Adding upstream version 3.7.9.upstream/3.7.9 upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-28 07:33:12 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-28 07:33:12 +0000
commit: 36082a2fe36ecd800d784ae44c14f1f18c66a7e9 (patch)
tree: 6c68e0c0097987aff85a01dabddd34b862309a7c /src/gl/tests
parent: Initial commit. (diff)
download: gnutls28-upstream.tar.xz
gnutls28-upstream.zip
266 files changed, 45483 insertions, 0 deletions
diff --git a/src/gl/tests/Makefile.am b/src/gl/tests/Makefile.am
new file mode 100644
index 0000000..d915da1
--- /dev/null
+++ b/src/gl/tests/Makefile.am
@@ -0,0 +1,1951 @@
+## DO NOT EDIT! GENERATED AUTOMATICALLY!
+## Process this file with automake to produce Makefile.in.
+# Copyright (C) 2002-2021 Free Software Foundation, Inc.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this file.  If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License,
+# this file may be distributed as part of a program that
+# contains a configuration script generated by Autoconf, under
+# the same distribution terms as the rest of that program.
+#
+# Generated by gnulib-tool.
+
+AUTOMAKE_OPTIONS = 1.11 foreign subdir-objects
+
+SUBDIRS = .
+TESTS =
+XFAIL_TESTS =
+TESTS_ENVIRONMENT =
+noinst_PROGRAMS =
+check_PROGRAMS =
+EXTRA_PROGRAMS =
+noinst_HEADERS =
+noinst_LIBRARIES =
+check_LIBRARIES = libtests.a
+EXTRA_DIST =
+BUILT_SOURCES =
+SUFFIXES =
+MOSTLYCLEANFILES = core *.stackdump
+MOSTLYCLEANDIRS =
+CLEANFILES =
+DISTCLEANFILES =
+MAINTAINERCLEANFILES =
+
+AM_CPPFLAGS = \
+  -D@ggltests_WITNESS@=1 \
+  -I. -I$(srcdir) \
+  -I../../.. -I$(srcdir)/../../.. \
+  -I../../../src/gl -I$(srcdir)/../../../src/gl
+
+LDADD = libtests.a ../../../src/gl/libgnu_gpl.la libtests.a ../../../src/gl/libgnu_gpl.la libtests.a $(LIBTESTS_LIBDEPS)
+
+libtests_a_SOURCES =
+libtests_a_LIBADD = $(ggltests_LIBOBJS)
+libtests_a_DEPENDENCIES = $(ggltests_LIBOBJS)
+EXTRA_libtests_a_SOURCES =
+AM_LIBTOOLFLAGS = --preserve-dup-deps
+
+TESTS_ENVIRONMENT += EXEEXT='@EXEEXT@' srcdir='$(srcdir)'
+
+## begin gnulib module accept-tests
+
+TESTS += test-accept
+check_PROGRAMS += test-accept
+test_accept_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-accept.c signature.h macros.h
+
+## end   gnulib module accept-tests
+
+## begin gnulib module alloca-opt-tests
+
+TESTS += test-alloca-opt
+check_PROGRAMS += test-alloca-opt
+
+EXTRA_DIST += test-alloca-opt.c
+
+## end   gnulib module alloca-opt-tests
+
+## begin gnulib module arpa_inet-tests
+
+TESTS += test-arpa_inet
+check_PROGRAMS += test-arpa_inet
+EXTRA_DIST += test-arpa_inet.c
+
+## end   gnulib module arpa_inet-tests
+
+## begin gnulib module array-list
+
+libtests_a_SOURCES += gl_array_list.h gl_array_list.c
+
+## end   gnulib module array-list
+
+## begin gnulib module array-list-tests
+
+TESTS += test-array_list
+check_PROGRAMS += test-array_list
+
+EXTRA_DIST += test-array_list.c macros.h
+
+## end   gnulib module array-list-tests
+
+## begin gnulib module atoll
+
+
+EXTRA_DIST += atoll.c
+
+EXTRA_libtests_a_SOURCES += atoll.c
+
+## end   gnulib module atoll
+
+## begin gnulib module binary-io
+
+libtests_a_SOURCES += binary-io.h binary-io.c
+
+## end   gnulib module binary-io
+
+## begin gnulib module binary-io-tests
+
+TESTS += test-binary-io.sh
+check_PROGRAMS += test-binary-io
+
+EXTRA_DIST += test-binary-io.sh test-binary-io.c macros.h
+
+## end   gnulib module binary-io-tests
+
+## begin gnulib module bind-tests
+
+TESTS += test-bind
+check_PROGRAMS += test-bind
+test_bind_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+EXTRA_DIST += test-bind.c signature.h macros.h
+
+## end   gnulib module bind-tests
+
+## begin gnulib module bitrotate-tests
+
+TESTS += test-bitrotate
+check_PROGRAMS += test-bitrotate
+EXTRA_DIST += test-bitrotate.c macros.h
+
+## end   gnulib module bitrotate-tests
+
+## begin gnulib module byteswap-tests
+
+TESTS += test-byteswap
+check_PROGRAMS += test-byteswap
+EXTRA_DIST += test-byteswap.c macros.h
+
+## end   gnulib module byteswap-tests
+
+## begin gnulib module c-ctype-tests
+
+TESTS += test-c-ctype
+check_PROGRAMS += test-c-ctype
+test_c_ctype_LDADD = $(LDADD) $(LIB_SETLOCALE)
+EXTRA_DIST += test-c-ctype.c macros.h
+
+## end   gnulib module c-ctype-tests
+
+## begin gnulib module c-strcase-tests
+
+TESTS += test-c-strcase.sh
+TESTS_ENVIRONMENT += LOCALE_FR='@LOCALE_FR@' LOCALE_TR_UTF8='@LOCALE_TR_UTF8@'
+check_PROGRAMS += test-c-strcasecmp test-c-strncasecmp
+test_c_strcasecmp_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_c_strncasecmp_LDADD = $(LDADD) $(LIB_SETLOCALE)
+EXTRA_DIST += test-c-strcase.sh test-c-strcasecmp.c test-c-strncasecmp.c macros.h
+
+## end   gnulib module c-strcase-tests
+
+## begin gnulib module calloc-gnu-tests
+
+TESTS += test-calloc-gnu
+check_PROGRAMS += test-calloc-gnu
+EXTRA_DIST += test-calloc-gnu.c macros.h
+
+## end   gnulib module calloc-gnu-tests
+
+## begin gnulib module cloexec-tests
+
+TESTS += test-cloexec
+check_PROGRAMS += test-cloexec
+EXTRA_DIST += test-cloexec.c macros.h
+
+## end   gnulib module cloexec-tests
+
+## begin gnulib module close-tests
+
+TESTS += test-close
+check_PROGRAMS += test-close
+EXTRA_DIST += test-close.c signature.h macros.h
+
+## end   gnulib module close-tests
+
+## begin gnulib module connect-tests
+
+TESTS += test-connect
+check_PROGRAMS += test-connect
+test_connect_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+EXTRA_DIST += test-connect.c signature.h macros.h
+
+## end   gnulib module connect-tests
+
+## begin gnulib module ctype
+
+BUILT_SOURCES += ctype.h
+
+# We need the following in order to create <ctype.h> when the system
+# doesn't have one that works with the given compiler.
+ctype.h: ctype.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_CTYPE_H''@|$(NEXT_CTYPE_H)|g' \
+	      -e 's/@''GNULIB_ISBLANK''@/$(GL_GGL_GNULIB_ISBLANK)/g' \
+	      -e 's/@''HAVE_ISBLANK''@/$(HAVE_ISBLANK)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/ctype.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += ctype.h ctype.h-t
+
+EXTRA_DIST += ctype.in.h
+
+## end   gnulib module ctype
+
+## begin gnulib module ctype-tests
+
+TESTS += test-ctype
+check_PROGRAMS += test-ctype
+EXTRA_DIST += test-ctype.c
+
+## end   gnulib module ctype-tests
+
+## begin gnulib module dtotimespec
+
+libtests_a_SOURCES += dtotimespec.c
+
+## end   gnulib module dtotimespec
+
+## begin gnulib module dup2-tests
+
+TESTS += test-dup2
+check_PROGRAMS += test-dup2
+EXTRA_DIST += test-dup2.c signature.h macros.h
+
+## end   gnulib module dup2-tests
+
+## begin gnulib module environ-tests
+
+TESTS += test-environ
+check_PROGRAMS += test-environ
+
+EXTRA_DIST += test-environ.c
+
+## end   gnulib module environ-tests
+
+## begin gnulib module errno-tests
+
+TESTS += test-errno
+check_PROGRAMS += test-errno
+
+EXTRA_DIST += test-errno.c
+
+## end   gnulib module errno-tests
+
+## begin gnulib module explicit_bzero-tests
+
+TESTS += test-explicit_bzero
+check_PROGRAMS += test-explicit_bzero
+EXTRA_DIST += test-explicit_bzero.c signature.h macros.h
+
+## end   gnulib module explicit_bzero-tests
+
+## begin gnulib module fcntl-h-tests
+
+TESTS += test-fcntl-h
+check_PROGRAMS += test-fcntl-h
+EXTRA_DIST += test-fcntl-h.c
+
+## end   gnulib module fcntl-h-tests
+
+## begin gnulib module fcntl-tests
+
+TESTS += test-fcntl
+check_PROGRAMS += test-fcntl
+EXTRA_DIST += test-fcntl.c signature.h macros.h
+
+## end   gnulib module fcntl-tests
+
+## begin gnulib module fdopen
+
+
+EXTRA_DIST += fdopen.c
+
+EXTRA_libtests_a_SOURCES += fdopen.c
+
+## end   gnulib module fdopen
+
+## begin gnulib module fdopen-tests
+
+TESTS += test-fdopen
+check_PROGRAMS += test-fdopen
+EXTRA_DIST += test-fdopen.c signature.h macros.h
+
+## end   gnulib module fdopen-tests
+
+## begin gnulib module fgetc-tests
+
+TESTS += test-fgetc
+check_PROGRAMS += test-fgetc
+EXTRA_DIST += test-fgetc.c signature.h macros.h
+
+## end   gnulib module fgetc-tests
+
+## begin gnulib module float-tests
+
+TESTS += test-float
+check_PROGRAMS += test-float
+EXTRA_DIST += test-float.c macros.h
+
+## end   gnulib module float-tests
+
+## begin gnulib module fopen-gnu-tests
+
+TESTS += test-fopen-gnu
+check_PROGRAMS += test-fopen-gnu
+EXTRA_DIST += test-fopen-gnu.c macros.h
+
+## end   gnulib module fopen-gnu-tests
+
+## begin gnulib module fopen-tests
+
+TESTS += test-fopen
+check_PROGRAMS += test-fopen
+
+EXTRA_DIST += test-fopen.h test-fopen.c signature.h macros.h
+
+## end   gnulib module fopen-tests
+
+## begin gnulib module fpending-tests
+
+TESTS += test-fpending.sh
+check_PROGRAMS += test-fpending
+MOSTLYCLEANFILES += test-fpending.t
+EXTRA_DIST += test-fpending.c test-fpending.sh macros.h
+
+## end   gnulib module fpending-tests
+
+## begin gnulib module fpucw
+
+
+EXTRA_DIST += fpucw.h
+
+## end   gnulib module fpucw
+
+## begin gnulib module fputc-tests
+
+TESTS += test-fputc
+check_PROGRAMS += test-fputc
+EXTRA_DIST += test-fputc.c signature.h macros.h
+
+## end   gnulib module fputc-tests
+
+## begin gnulib module fread-tests
+
+TESTS += test-fread
+check_PROGRAMS += test-fread
+EXTRA_DIST += test-fread.c signature.h macros.h
+
+## end   gnulib module fread-tests
+
+## begin gnulib module free-posix-tests
+
+TESTS += test-free
+check_PROGRAMS += test-free
+EXTRA_DIST += test-free.c macros.h
+
+## end   gnulib module free-posix-tests
+
+## begin gnulib module fseek-tests
+
+TESTS += test-fseek.sh test-fseek2.sh
+check_PROGRAMS += test-fseek
+EXTRA_DIST += test-fseek.c test-fseek.sh test-fseek2.sh signature.h macros.h
+
+## end   gnulib module fseek-tests
+
+## begin gnulib module fseeko-tests
+
+TESTS += test-fseeko.sh test-fseeko2.sh test-fseeko3.sh test-fseeko4.sh
+check_PROGRAMS += test-fseeko test-fseeko3 test-fseeko4
+EXTRA_DIST += test-fseeko.c test-fseeko.sh test-fseeko2.sh test-fseeko3.c test-fseeko3.sh test-fseeko4.c test-fseeko4.sh signature.h macros.h
+
+## end   gnulib module fseeko-tests
+
+## begin gnulib module fstat-tests
+
+TESTS += test-fstat
+check_PROGRAMS += test-fstat
+EXTRA_DIST += test-fstat.c signature.h macros.h
+
+## end   gnulib module fstat-tests
+
+## begin gnulib module ftell-tests
+
+TESTS += test-ftell.sh test-ftell2.sh test-ftell3
+check_PROGRAMS += test-ftell test-ftell3
+MOSTLYCLEANFILES += t-ftell3.tmp
+EXTRA_DIST += test-ftell.c test-ftell.sh test-ftell2.sh test-ftell3.c signature.h macros.h
+
+## end   gnulib module ftell-tests
+
+## begin gnulib module ftello-tests
+
+TESTS += test-ftello.sh test-ftello2.sh test-ftello3 test-ftello4.sh
+check_PROGRAMS += test-ftello test-ftello3 test-ftello4
+MOSTLYCLEANFILES += t-ftello3.tmp
+EXTRA_DIST += test-ftello.c test-ftello.sh test-ftello2.sh test-ftello3.c test-ftello4.c test-ftello4.sh signature.h macros.h
+
+## end   gnulib module ftello-tests
+
+## begin gnulib module ftruncate
+
+
+EXTRA_DIST += ftruncate.c
+
+EXTRA_libtests_a_SOURCES += ftruncate.c
+
+## end   gnulib module ftruncate
+
+## begin gnulib module ftruncate-tests
+
+TESTS += test-ftruncate.sh
+check_PROGRAMS += test-ftruncate
+EXTRA_DIST += test-ftruncate.c test-ftruncate.sh signature.h macros.h
+
+## end   gnulib module ftruncate-tests
+
+## begin gnulib module func-tests
+
+TESTS += test-func
+check_PROGRAMS += test-func
+EXTRA_DIST += test-func.c macros.h
+
+## end   gnulib module func-tests
+
+## begin gnulib module fwrite-tests
+
+TESTS += test-fwrite
+check_PROGRAMS += test-fwrite
+EXTRA_DIST += test-fwrite.c signature.h macros.h
+
+## end   gnulib module fwrite-tests
+
+## begin gnulib module getaddrinfo-tests
+
+TESTS += test-getaddrinfo
+check_PROGRAMS += test-getaddrinfo
+test_getaddrinfo_LDADD = $(LDADD) @GETADDRINFO_LIB@ @LIBINTL@
+EXTRA_DIST += signature.h test-getaddrinfo.c
+
+## end   gnulib module getaddrinfo-tests
+
+## begin gnulib module getcwd-lgpl
+
+
+EXTRA_DIST += getcwd-lgpl.c
+
+EXTRA_libtests_a_SOURCES += getcwd-lgpl.c
+
+## end   gnulib module getcwd-lgpl
+
+## begin gnulib module getcwd-lgpl-tests
+
+TESTS += test-getcwd-lgpl
+check_PROGRAMS += test-getcwd-lgpl
+test_getcwd_lgpl_LDADD = $(LDADD) $(LIBINTL)
+EXTRA_DIST += test-getcwd-lgpl.c signature.h macros.h
+
+## end   gnulib module getcwd-lgpl-tests
+
+## begin gnulib module getdelim-tests
+
+TESTS += test-getdelim
+check_PROGRAMS += test-getdelim
+MOSTLYCLEANFILES += test-getdelim.txt
+EXTRA_DIST += test-getdelim.c signature.h macros.h
+
+## end   gnulib module getdelim-tests
+
+## begin gnulib module getdtablesize-tests
+
+TESTS += test-getdtablesize
+check_PROGRAMS += test-getdtablesize
+EXTRA_DIST += test-getdtablesize.c signature.h macros.h
+
+## end   gnulib module getdtablesize-tests
+
+## begin gnulib module getline-tests
+
+TESTS += test-getline
+check_PROGRAMS += test-getline
+MOSTLYCLEANFILES += test-getline.txt
+EXTRA_DIST += test-getline.c signature.h macros.h
+
+## end   gnulib module getline-tests
+
+## begin gnulib module getpagesize
+
+
+EXTRA_DIST += getpagesize.c
+
+EXTRA_libtests_a_SOURCES += getpagesize.c
+
+## end   gnulib module getpagesize
+
+## begin gnulib module getpeername-tests
+
+TESTS += test-getpeername
+check_PROGRAMS += test-getpeername
+test_getpeername_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-getpeername.c signature.h macros.h
+
+## end   gnulib module getpeername-tests
+
+## begin gnulib module getprogname-tests
+
+DEFS += -DEXEEXT=\"@EXEEXT@\"
+TESTS += test-getprogname
+check_PROGRAMS += test-getprogname
+test_getprogname_LDADD = $(LDADD)
+EXTRA_DIST += test-getprogname.c
+
+## end   gnulib module getprogname-tests
+
+## begin gnulib module gettimeofday-tests
+
+TESTS += test-gettimeofday
+check_PROGRAMS += test-gettimeofday
+
+EXTRA_DIST += signature.h test-gettimeofday.c
+
+## end   gnulib module gettimeofday-tests
+
+## begin gnulib module hash-pjw
+
+libtests_a_SOURCES += hash-pjw.h hash-pjw.c
+
+## end   gnulib module hash-pjw
+
+## begin gnulib module hash-tests
+
+TESTS += test-hash
+check_PROGRAMS += test-hash
+EXTRA_DIST += test-hash.c macros.h
+
+## end   gnulib module hash-tests
+
+## begin gnulib module ignore-value
+
+
+EXTRA_DIST += ignore-value.h
+
+## end   gnulib module ignore-value
+
+## begin gnulib module ignore-value-tests
+
+TESTS += test-ignore-value
+check_PROGRAMS += test-ignore-value
+EXTRA_DIST += test-ignore-value.c
+
+## end   gnulib module ignore-value-tests
+
+## begin gnulib module inet_ntop-tests
+
+TESTS += test-inet_ntop
+check_PROGRAMS += test-inet_ntop
+test_inet_ntop_LDADD = $(LDADD) @INET_NTOP_LIB@
+EXTRA_DIST += test-inet_ntop.c signature.h macros.h
+
+## end   gnulib module inet_ntop-tests
+
+## begin gnulib module inet_pton-tests
+
+TESTS += test-inet_pton
+check_PROGRAMS += test-inet_pton
+test_inet_pton_LDADD = $(LDADD) @INET_PTON_LIB@
+EXTRA_DIST += test-inet_pton.c signature.h macros.h
+
+## end   gnulib module inet_pton-tests
+
+## begin gnulib module intprops-tests
+
+TESTS += test-intprops
+check_PROGRAMS += test-intprops
+EXTRA_DIST += test-intprops.c macros.h
+
+## end   gnulib module intprops-tests
+
+## begin gnulib module inttostr
+
+libtests_a_SOURCES +=    imaxtostr.c    inttostr.c    offtostr.c    uinttostr.c    umaxtostr.c
+
+EXTRA_DIST += anytostr.c inttostr.h
+
+EXTRA_libtests_a_SOURCES += anytostr.c
+
+## end   gnulib module inttostr
+
+## begin gnulib module inttostr-tests
+
+TESTS += test-inttostr
+check_PROGRAMS += test-inttostr
+EXTRA_DIST += macros.h test-inttostr.c
+
+## end   gnulib module inttostr-tests
+
+## begin gnulib module inttypes-tests
+
+TESTS += test-inttypes
+check_PROGRAMS += test-inttypes
+EXTRA_DIST += test-inttypes.c
+
+## end   gnulib module inttypes-tests
+
+## begin gnulib module ioctl
+
+
+EXTRA_DIST += ioctl.c w32sock.h
+
+EXTRA_libtests_a_SOURCES += ioctl.c
+
+## end   gnulib module ioctl
+
+## begin gnulib module ioctl-tests
+
+TESTS += test-ioctl
+check_PROGRAMS += test-ioctl
+EXTRA_DIST += test-ioctl.c signature.h macros.h
+
+## end   gnulib module ioctl-tests
+
+## begin gnulib module isblank
+
+
+EXTRA_DIST += isblank.c
+
+EXTRA_libtests_a_SOURCES += isblank.c
+
+## end   gnulib module isblank
+
+## begin gnulib module isblank-tests
+
+TESTS += test-isblank
+check_PROGRAMS += test-isblank
+EXTRA_DIST += test-isblank.c signature.h macros.h
+
+## end   gnulib module isblank-tests
+
+## begin gnulib module langinfo
+
+BUILT_SOURCES += langinfo.h
+
+# We need the following in order to create an empty placeholder for
+# <langinfo.h> when the system doesn't have one.
+langinfo.h: langinfo.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''HAVE_LANGINFO_H''@|$(HAVE_LANGINFO_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LANGINFO_H''@|$(NEXT_LANGINFO_H)|g' \
+	      -e 's/@''GNULIB_NL_LANGINFO''@/$(GL_GGL_GNULIB_NL_LANGINFO)/g' \
+	      -e 's|@''HAVE_LANGINFO_CODESET''@|$(HAVE_LANGINFO_CODESET)|g' \
+	      -e 's|@''HAVE_LANGINFO_T_FMT_AMPM''@|$(HAVE_LANGINFO_T_FMT_AMPM)|g' \
+	      -e 's|@''HAVE_LANGINFO_ALTMON''@|$(HAVE_LANGINFO_ALTMON)|g' \
+	      -e 's|@''HAVE_LANGINFO_ERA''@|$(HAVE_LANGINFO_ERA)|g' \
+	      -e 's|@''HAVE_LANGINFO_YESEXPR''@|$(HAVE_LANGINFO_YESEXPR)|g' \
+	      -e 's|@''HAVE_NL_LANGINFO''@|$(HAVE_NL_LANGINFO)|g' \
+	      -e 's|@''REPLACE_NL_LANGINFO''@|$(REPLACE_NL_LANGINFO)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/langinfo.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += langinfo.h langinfo.h-t
+
+EXTRA_DIST += langinfo.in.h
+
+## end   gnulib module langinfo
+
+## begin gnulib module langinfo-tests
+
+TESTS += test-langinfo
+check_PROGRAMS += test-langinfo
+EXTRA_DIST += test-langinfo.c
+
+## end   gnulib module langinfo-tests
+
+## begin gnulib module limits-h-tests
+
+TESTS += test-limits-h
+check_PROGRAMS += test-limits-h
+EXTRA_DIST += test-limits-h.c
+
+## end   gnulib module limits-h-tests
+
+## begin gnulib module linked-list-tests
+
+TESTS += test-linked_list
+check_PROGRAMS += test-linked_list
+EXTRA_DIST += test-linked_list.c macros.h
+
+## end   gnulib module linked-list-tests
+
+## begin gnulib module listen-tests
+
+TESTS += test-listen
+check_PROGRAMS += test-listen
+test_listen_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-listen.c signature.h macros.h
+
+## end   gnulib module listen-tests
+
+## begin gnulib module locale
+
+BUILT_SOURCES += locale.h
+
+# We need the following in order to create <locale.h> when the system
+# doesn't have one that provides all definitions.
+locale.h: locale.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LOCALE_H''@|$(NEXT_LOCALE_H)|g' \
+	      -e 's/@''GNULIB_LOCALECONV''@/$(GL_GGL_GNULIB_LOCALECONV)/g' \
+	      -e 's/@''GNULIB_SETLOCALE''@/$(GL_GGL_GNULIB_SETLOCALE)/g' \
+	      -e 's/@''GNULIB_SETLOCALE_NULL''@/$(GL_GGL_GNULIB_SETLOCALE_NULL)/g' \
+	      -e 's/@''GNULIB_DUPLOCALE''@/$(GL_GGL_GNULIB_DUPLOCALE)/g' \
+	      -e 's/@''GNULIB_LOCALENAME''@/$(GL_GGL_GNULIB_LOCALENAME)/g' \
+	      -e 's|@''HAVE_NEWLOCALE''@|$(HAVE_NEWLOCALE)|g' \
+	      -e 's|@''HAVE_DUPLOCALE''@|$(HAVE_DUPLOCALE)|g' \
+	      -e 's|@''HAVE_FREELOCALE''@|$(HAVE_FREELOCALE)|g' \
+	      -e 's|@''HAVE_XLOCALE_H''@|$(HAVE_XLOCALE_H)|g' \
+	      -e 's|@''REPLACE_LOCALECONV''@|$(REPLACE_LOCALECONV)|g' \
+	      -e 's|@''REPLACE_SETLOCALE''@|$(REPLACE_SETLOCALE)|g' \
+	      -e 's|@''REPLACE_NEWLOCALE''@|$(REPLACE_NEWLOCALE)|g' \
+	      -e 's|@''REPLACE_DUPLOCALE''@|$(REPLACE_DUPLOCALE)|g' \
+	      -e 's|@''REPLACE_FREELOCALE''@|$(REPLACE_FREELOCALE)|g' \
+	      -e 's|@''REPLACE_STRUCT_LCONV''@|$(REPLACE_STRUCT_LCONV)|g' \
+	      -e 's|@''LOCALENAME_ENHANCE_LOCALE_FUNCS''@|$(LOCALENAME_ENHANCE_LOCALE_FUNCS)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/locale.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += locale.h locale.h-t
+
+EXTRA_DIST += locale.in.h
+
+## end   gnulib module locale
+
+## begin gnulib module locale-tests
+
+TESTS += test-locale
+check_PROGRAMS += test-locale
+EXTRA_DIST += test-locale.c
+
+## end   gnulib module locale-tests
+
+## begin gnulib module localename
+
+libtests_a_SOURCES += localename.c localename-table.c
+
+EXTRA_DIST += localename-table.h localename.h
+
+## end   gnulib module localename
+
+## begin gnulib module localename-tests
+
+TESTS += test-localename
+check_PROGRAMS += test-localename
+test_localename_LDADD = $(LDADD) $(LIB_SETLOCALE) @INTL_MACOSX_LIBS@ $(LIBTHREAD)
+
+EXTRA_DIST += test-localename.c macros.h
+
+## end   gnulib module localename-tests
+
+## begin gnulib module lock-tests
+
+TESTS += test-rwlock1 test-lock test-once1 test-once2
+check_PROGRAMS += test-rwlock1 test-lock test-once1 test-once2
+test_rwlock1_LDADD = $(LDADD) @LIBMULTITHREAD@ @YIELD_LIB@
+test_lock_LDADD = $(LDADD) @LIBMULTITHREAD@ @YIELD_LIB@ @LIB_SEMAPHORE@
+test_once1_SOURCES = test-once.c
+test_once1_LDADD = $(LDADD) @LIBTHREAD@
+test_once2_SOURCES = test-once.c
+test_once2_LDADD = $(LDADD) @LIBMULTITHREAD@
+EXTRA_DIST += test-rwlock1.c test-lock.c test-once.c atomic-int-gnulib.h
+
+## end   gnulib module lock-tests
+
+## begin gnulib module lseek-tests
+
+TESTS += test-lseek.sh
+check_PROGRAMS += test-lseek
+EXTRA_DIST += test-lseek.c test-lseek.sh signature.h macros.h
+
+## end   gnulib module lseek-tests
+
+## begin gnulib module lstat
+
+
+EXTRA_DIST += lstat.c
+
+EXTRA_libtests_a_SOURCES += lstat.c
+
+## end   gnulib module lstat
+
+## begin gnulib module lstat-tests
+
+TESTS += test-lstat
+check_PROGRAMS += test-lstat
+EXTRA_DIST += test-lstat.h test-lstat.c signature.h macros.h
+
+## end   gnulib module lstat-tests
+
+## begin gnulib module malloc-gnu-tests
+
+TESTS += test-malloc-gnu
+check_PROGRAMS += test-malloc-gnu
+EXTRA_DIST += test-malloc-gnu.c macros.h
+
+## end   gnulib module malloc-gnu-tests
+
+## begin gnulib module malloca-tests
+
+TESTS += test-malloca
+check_PROGRAMS += test-malloca
+
+EXTRA_DIST += test-malloca.c
+
+## end   gnulib module malloca-tests
+
+## begin gnulib module memchr-tests
+
+TESTS += test-memchr
+check_PROGRAMS += test-memchr
+EXTRA_DIST += test-memchr.c zerosize-ptr.h signature.h macros.h
+
+## end   gnulib module memchr-tests
+
+## begin gnulib module nanosleep
+
+
+EXTRA_DIST += nanosleep.c
+
+EXTRA_libtests_a_SOURCES += nanosleep.c
+
+## end   gnulib module nanosleep
+
+## begin gnulib module nanosleep-tests
+
+TESTS += test-nanosleep
+check_PROGRAMS += test-nanosleep
+test_nanosleep_LDADD = $(LDADD) $(LIB_NANOSLEEP)
+EXTRA_DIST += test-nanosleep.c signature.h macros.h
+
+## end   gnulib module nanosleep-tests
+
+## begin gnulib module netdb-tests
+
+TESTS += test-netdb
+check_PROGRAMS += test-netdb
+EXTRA_DIST += test-netdb.c
+
+## end   gnulib module netdb-tests
+
+## begin gnulib module netinet_in-tests
+
+TESTS += test-netinet_in
+check_PROGRAMS += test-netinet_in
+EXTRA_DIST += test-netinet_in.c
+
+## end   gnulib module netinet_in-tests
+
+## begin gnulib module nstrftime-tests
+
+TESTS += test-nstrftime
+check_PROGRAMS += test-nstrftime
+EXTRA_DIST += test-nstrftime.c macros.h
+
+## end   gnulib module nstrftime-tests
+
+## begin gnulib module open-tests
+
+TESTS += test-open
+check_PROGRAMS += test-open
+EXTRA_DIST += test-open.h test-open.c signature.h macros.h
+
+## end   gnulib module open-tests
+
+## begin gnulib module parse-datetime-tests
+
+TESTS += test-parse-datetime
+check_PROGRAMS += test-parse-datetime
+test_parse_datetime_LDADD = $(LDADD) @LIBINTL@ $(LIB_CLOCK_GETTIME)
+EXTRA_DIST += test-parse-datetime.c macros.h
+
+## end   gnulib module parse-datetime-tests
+
+## begin gnulib module pathmax-tests
+
+TESTS += test-pathmax
+check_PROGRAMS += test-pathmax
+EXTRA_DIST += test-pathmax.c
+
+## end   gnulib module pathmax-tests
+
+## begin gnulib module perror
+
+
+EXTRA_DIST += perror.c
+
+EXTRA_libtests_a_SOURCES += perror.c
+
+## end   gnulib module perror
+
+## begin gnulib module perror-tests
+
+TESTS += test-perror.sh test-perror2
+check_PROGRAMS += test-perror test-perror2
+EXTRA_DIST += macros.h signature.h test-perror.c test-perror2.c test-perror.sh
+
+## end   gnulib module perror-tests
+
+## begin gnulib module pipe-posix
+
+
+EXTRA_DIST += pipe.c
+
+EXTRA_libtests_a_SOURCES += pipe.c
+
+## end   gnulib module pipe-posix
+
+## begin gnulib module pipe-posix-tests
+
+TESTS += test-pipe
+check_PROGRAMS += test-pipe
+EXTRA_DIST += test-pipe.c signature.h macros.h
+
+## end   gnulib module pipe-posix-tests
+
+## begin gnulib module pthread-h
+
+BUILT_SOURCES += pthread.h
+
+# We need the following in order to create <pthread.h> when the system
+# doesn't have one that works with the given compiler.
+pthread.h: pthread.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(_NORETURN_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''HAVE_PTHREAD_H''@|$(HAVE_PTHREAD_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_PTHREAD_H''@|$(NEXT_PTHREAD_H)|g' \
+	      -e 's/@''GNULIB_PTHREAD_THREAD''@/$(GL_GGL_GNULIB_PTHREAD_THREAD)/g' \
+	      -e 's/@''GNULIB_PTHREAD_ONCE''@/$(GL_GGL_GNULIB_PTHREAD_ONCE)/g' \
+	      -e 's/@''GNULIB_PTHREAD_MUTEX''@/$(GL_GGL_GNULIB_PTHREAD_MUTEX)/g' \
+	      -e 's/@''GNULIB_PTHREAD_RWLOCK''@/$(GL_GGL_GNULIB_PTHREAD_RWLOCK)/g' \
+	      -e 's/@''GNULIB_PTHREAD_COND''@/$(GL_GGL_GNULIB_PTHREAD_COND)/g' \
+	      -e 's/@''GNULIB_PTHREAD_TSS''@/$(GL_GGL_GNULIB_PTHREAD_TSS)/g' \
+	      -e 's/@''GNULIB_PTHREAD_SPIN''@/$(GL_GGL_GNULIB_PTHREAD_SPIN)/g' \
+	      -e 's/@''GNULIB_PTHREAD_MUTEX_TIMEDLOCK''@/$(GL_GGL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK)/g' \
+	      -e 's|@''HAVE_PTHREAD_T''@|$(HAVE_PTHREAD_T)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPINLOCK_T''@|$(HAVE_PTHREAD_SPINLOCK_T)|g' \
+	      -e 's|@''HAVE_PTHREAD_CREATE_DETACHED''@|$(HAVE_PTHREAD_CREATE_DETACHED)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_RECURSIVE''@|$(HAVE_PTHREAD_MUTEX_RECURSIVE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_ROBUST''@|$(HAVE_PTHREAD_MUTEX_ROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_PROCESS_SHARED''@|$(HAVE_PTHREAD_PROCESS_SHARED)|g' \
+	      -e 's|@''HAVE_PTHREAD_CREATE''@|$(HAVE_PTHREAD_CREATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_INIT''@|$(HAVE_PTHREAD_ATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_GETDETACHSTATE''@|$(HAVE_PTHREAD_ATTR_GETDETACHSTATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_SETDETACHSTATE''@|$(HAVE_PTHREAD_ATTR_SETDETACHSTATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_DESTROY''@|$(HAVE_PTHREAD_ATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_SELF''@|$(HAVE_PTHREAD_SELF)|g' \
+	      -e 's|@''HAVE_PTHREAD_EQUAL''@|$(HAVE_PTHREAD_EQUAL)|g' \
+	      -e 's|@''HAVE_PTHREAD_DETACH''@|$(HAVE_PTHREAD_DETACH)|g' \
+	      -e 's|@''HAVE_PTHREAD_JOIN''@|$(HAVE_PTHREAD_JOIN)|g' \
+	      -e 's|@''HAVE_PTHREAD_EXIT''@|$(HAVE_PTHREAD_EXIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_ONCE''@|$(HAVE_PTHREAD_ONCE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_INIT''@|$(HAVE_PTHREAD_MUTEX_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_INIT''@|$(HAVE_PTHREAD_MUTEXATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_GETTYPE''@|$(HAVE_PTHREAD_MUTEXATTR_GETTYPE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_SETTYPE''@|$(HAVE_PTHREAD_MUTEXATTR_SETTYPE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_GETROBUST''@|$(HAVE_PTHREAD_MUTEXATTR_GETROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_SETROBUST''@|$(HAVE_PTHREAD_MUTEXATTR_SETROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_DESTROY''@|$(HAVE_PTHREAD_MUTEXATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_LOCK''@|$(HAVE_PTHREAD_MUTEX_LOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_TRYLOCK''@|$(HAVE_PTHREAD_MUTEX_TRYLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_TIMEDLOCK''@|$(HAVE_PTHREAD_MUTEX_TIMEDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_UNLOCK''@|$(HAVE_PTHREAD_MUTEX_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_DESTROY''@|$(HAVE_PTHREAD_MUTEX_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_INIT''@|$(HAVE_PTHREAD_RWLOCK_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCKATTR_INIT''@|$(HAVE_PTHREAD_RWLOCKATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCKATTR_DESTROY''@|$(HAVE_PTHREAD_RWLOCKATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_RDLOCK''@|$(HAVE_PTHREAD_RWLOCK_RDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_WRLOCK''@|$(HAVE_PTHREAD_RWLOCK_WRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TRYRDLOCK''@|$(HAVE_PTHREAD_RWLOCK_TRYRDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TRYWRLOCK''@|$(HAVE_PTHREAD_RWLOCK_TRYWRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK''@|$(HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK''@|$(HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_UNLOCK''@|$(HAVE_PTHREAD_RWLOCK_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_DESTROY''@|$(HAVE_PTHREAD_RWLOCK_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_INIT''@|$(HAVE_PTHREAD_COND_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_CONDATTR_INIT''@|$(HAVE_PTHREAD_CONDATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_CONDATTR_DESTROY''@|$(HAVE_PTHREAD_CONDATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_WAIT''@|$(HAVE_PTHREAD_COND_WAIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_TIMEDWAIT''@|$(HAVE_PTHREAD_COND_TIMEDWAIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_SIGNAL''@|$(HAVE_PTHREAD_COND_SIGNAL)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_BROADCAST''@|$(HAVE_PTHREAD_COND_BROADCAST)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_DESTROY''@|$(HAVE_PTHREAD_COND_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_KEY_CREATE''@|$(HAVE_PTHREAD_KEY_CREATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_SETSPECIFIC''@|$(HAVE_PTHREAD_SETSPECIFIC)|g' \
+	      -e 's|@''HAVE_PTHREAD_GETSPECIFIC''@|$(HAVE_PTHREAD_GETSPECIFIC)|g' \
+	      -e 's|@''HAVE_PTHREAD_KEY_DELETE''@|$(HAVE_PTHREAD_KEY_DELETE)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_INIT''@|$(HAVE_PTHREAD_SPIN_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_LOCK''@|$(HAVE_PTHREAD_SPIN_LOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_TRYLOCK''@|$(HAVE_PTHREAD_SPIN_TRYLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_UNLOCK''@|$(HAVE_PTHREAD_SPIN_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_DESTROY''@|$(HAVE_PTHREAD_SPIN_DESTROY)|g' \
+	      < $(srcdir)/pthread.in.h | \
+	  sed -e 's|@''REPLACE_PTHREAD_CREATE''@|$(REPLACE_PTHREAD_CREATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_INIT''@|$(REPLACE_PTHREAD_ATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_GETDETACHSTATE''@|$(REPLACE_PTHREAD_ATTR_GETDETACHSTATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_SETDETACHSTATE''@|$(REPLACE_PTHREAD_ATTR_SETDETACHSTATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_DESTROY''@|$(REPLACE_PTHREAD_ATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SELF''@|$(REPLACE_PTHREAD_SELF)|g' \
+	      -e 's|@''REPLACE_PTHREAD_EQUAL''@|$(REPLACE_PTHREAD_EQUAL)|g' \
+	      -e 's|@''REPLACE_PTHREAD_DETACH''@|$(REPLACE_PTHREAD_DETACH)|g' \
+	      -e 's|@''REPLACE_PTHREAD_JOIN''@|$(REPLACE_PTHREAD_JOIN)|g' \
+	      -e 's|@''REPLACE_PTHREAD_EXIT''@|$(REPLACE_PTHREAD_EXIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ONCE''@|$(REPLACE_PTHREAD_ONCE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_INIT''@|$(REPLACE_PTHREAD_MUTEX_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_INIT''@|$(REPLACE_PTHREAD_MUTEXATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_GETTYPE''@|$(REPLACE_PTHREAD_MUTEXATTR_GETTYPE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_SETTYPE''@|$(REPLACE_PTHREAD_MUTEXATTR_SETTYPE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_GETROBUST''@|$(REPLACE_PTHREAD_MUTEXATTR_GETROBUST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_SETROBUST''@|$(REPLACE_PTHREAD_MUTEXATTR_SETROBUST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_DESTROY''@|$(REPLACE_PTHREAD_MUTEXATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_LOCK''@|$(REPLACE_PTHREAD_MUTEX_LOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_TRYLOCK''@|$(REPLACE_PTHREAD_MUTEX_TRYLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_TIMEDLOCK''@|$(REPLACE_PTHREAD_MUTEX_TIMEDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_UNLOCK''@|$(REPLACE_PTHREAD_MUTEX_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_DESTROY''@|$(REPLACE_PTHREAD_MUTEX_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_INIT''@|$(REPLACE_PTHREAD_RWLOCK_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCKATTR_INIT''@|$(REPLACE_PTHREAD_RWLOCKATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCKATTR_DESTROY''@|$(REPLACE_PTHREAD_RWLOCKATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_RDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_RDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_WRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_WRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TRYRDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TRYRDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TRYWRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TRYWRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_UNLOCK''@|$(REPLACE_PTHREAD_RWLOCK_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_DESTROY''@|$(REPLACE_PTHREAD_RWLOCK_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_INIT''@|$(REPLACE_PTHREAD_COND_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_CONDATTR_INIT''@|$(REPLACE_PTHREAD_CONDATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_CONDATTR_DESTROY''@|$(REPLACE_PTHREAD_CONDATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_WAIT''@|$(REPLACE_PTHREAD_COND_WAIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_TIMEDWAIT''@|$(REPLACE_PTHREAD_COND_TIMEDWAIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_SIGNAL''@|$(REPLACE_PTHREAD_COND_SIGNAL)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_BROADCAST''@|$(REPLACE_PTHREAD_COND_BROADCAST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_DESTROY''@|$(REPLACE_PTHREAD_COND_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_KEY_CREATE''@|$(REPLACE_PTHREAD_KEY_CREATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SETSPECIFIC''@|$(REPLACE_PTHREAD_SETSPECIFIC)|g' \
+	      -e 's|@''REPLACE_PTHREAD_GETSPECIFIC''@|$(REPLACE_PTHREAD_GETSPECIFIC)|g' \
+	      -e 's|@''REPLACE_PTHREAD_KEY_DELETE''@|$(REPLACE_PTHREAD_KEY_DELETE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_INIT''@|$(REPLACE_PTHREAD_SPIN_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_LOCK''@|$(REPLACE_PTHREAD_SPIN_LOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_TRYLOCK''@|$(REPLACE_PTHREAD_SPIN_TRYLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_UNLOCK''@|$(REPLACE_PTHREAD_SPIN_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_DESTROY''@|$(REPLACE_PTHREAD_SPIN_DESTROY)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _Noreturn/r $(_NORETURN_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += pthread.h pthread.h-t
+
+EXTRA_DIST += pthread.in.h
+
+## end   gnulib module pthread-h
+
+## begin gnulib module pthread-h-tests
+
+TESTS += test-pthread
+check_PROGRAMS += test-pthread
+EXTRA_DIST += test-pthread.c
+
+## end   gnulib module pthread-h-tests
+
+## begin gnulib module pthread-thread
+
+
+EXTRA_DIST += pthread-thread.c
+
+EXTRA_libtests_a_SOURCES += pthread-thread.c
+
+## end   gnulib module pthread-thread
+
+## begin gnulib module pthread-thread-tests
+
+TESTS += test-pthread-thread
+check_PROGRAMS += test-pthread-thread
+test_pthread_thread_LDADD = $(LDADD) @LIBPMULTITHREAD@
+EXTRA_DIST += test-pthread-thread.c macros.h
+
+## end   gnulib module pthread-thread-tests
+
+## begin gnulib module pthread_sigmask
+
+
+EXTRA_DIST += pthread_sigmask.c
+
+EXTRA_libtests_a_SOURCES += pthread_sigmask.c
+
+## end   gnulib module pthread_sigmask
+
+## begin gnulib module pthread_sigmask-tests
+
+TESTS += test-pthread_sigmask1 test-pthread_sigmask2
+check_PROGRAMS += test-pthread_sigmask1 test-pthread_sigmask2
+test_pthread_sigmask1_LDADD = $(LDADD) @LIB_PTHREAD_SIGMASK@
+test_pthread_sigmask2_LDADD = $(LDADD) @LIB_PTHREAD_SIGMASK@ @LIBMULTITHREAD@
+EXTRA_DIST += test-pthread_sigmask1.c test-pthread_sigmask2.c signature.h macros.h
+
+## end   gnulib module pthread_sigmask-tests
+
+## begin gnulib module putenv
+
+
+EXTRA_DIST += putenv.c
+
+EXTRA_libtests_a_SOURCES += putenv.c
+
+## end   gnulib module putenv
+
+## begin gnulib module raise
+
+
+EXTRA_DIST += raise.c
+
+EXTRA_libtests_a_SOURCES += raise.c
+
+## end   gnulib module raise
+
+## begin gnulib module raise-tests
+
+TESTS += test-raise
+check_PROGRAMS += test-raise
+EXTRA_DIST += test-raise.c signature.h macros.h
+
+## end   gnulib module raise-tests
+
+## begin gnulib module read-file-tests
+
+TESTS += test-read-file
+check_PROGRAMS += test-read-file
+EXTRA_DIST += test-read-file.c macros.h
+
+## end   gnulib module read-file-tests
+
+## begin gnulib module realloc-gnu-tests
+
+TESTS += test-realloc-gnu
+check_PROGRAMS += test-realloc-gnu
+EXTRA_DIST += test-realloc-gnu.c macros.h
+
+## end   gnulib module realloc-gnu-tests
+
+## begin gnulib module reallocarray-tests
+
+TESTS += test-reallocarray
+check_PROGRAMS += test-reallocarray
+EXTRA_DIST += test-reallocarray.c signature.h macros.h
+
+## end   gnulib module reallocarray-tests
+
+## begin gnulib module recv-tests
+
+TESTS += test-recv
+check_PROGRAMS += test-recv
+test_recv_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-recv.c signature.h macros.h
+
+## end   gnulib module recv-tests
+
+## begin gnulib module recvfrom-tests
+
+TESTS += test-recvfrom
+check_PROGRAMS += test-recvfrom
+test_recvfrom_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-recvfrom.c signature.h macros.h
+
+## end   gnulib module recvfrom-tests
+
+## begin gnulib module same-inode
+
+
+EXTRA_DIST += same-inode.h
+
+## end   gnulib module same-inode
+
+## begin gnulib module sched
+
+BUILT_SOURCES += sched.h
+
+# We need the following in order to create a replacement for <sched.h> when
+# the system doesn't have one.
+sched.h: sched.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''HAVE_SCHED_H''@|$(HAVE_SCHED_H)|g' \
+	      -e 's|@''HAVE_SYS_CDEFS_H''@|$(HAVE_SYS_CDEFS_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SCHED_H''@|$(NEXT_SCHED_H)|g' \
+	      -e 's|@''HAVE_STRUCT_SCHED_PARAM''@|$(HAVE_STRUCT_SCHED_PARAM)|g' \
+	      -e 's/@''GNULIB_SCHED_YIELD''@/$(GL_GGL_GNULIB_SCHED_YIELD)/g' \
+	      -e 's|@''HAVE_SCHED_YIELD''@|$(HAVE_SCHED_YIELD)|g' \
+	      -e 's|@''REPLACE_SCHED_YIELD''@|$(REPLACE_SCHED_YIELD)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sched.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += sched.h sched.h-t
+
+EXTRA_DIST += sched.in.h
+
+## end   gnulib module sched
+
+## begin gnulib module sched-tests
+
+TESTS += test-sched
+check_PROGRAMS += test-sched
+EXTRA_DIST += test-sched.c
+
+## end   gnulib module sched-tests
+
+## begin gnulib module sched_yield
+
+
+EXTRA_DIST += sched_yield.c
+
+EXTRA_libtests_a_SOURCES += sched_yield.c
+
+## end   gnulib module sched_yield
+
+## begin gnulib module select-tests
+
+TESTS += test-select test-select-in.sh test-select-out.sh
+# test-select-stdin has to be run by hand.
+check_PROGRAMS += test-select test-select-fd test-select-stdin
+test_select_LDADD = $(LDADD) @LIB_SELECT@ @LIBSOCKET@ $(INET_PTON_LIB)
+test_select_fd_LDADD = $(LDADD) @LIB_SELECT@
+test_select_stdin_LDADD = $(LDADD) @LIB_SELECT@
+EXTRA_DIST += macros.h signature.h test-select.c test-select.h test-select-fd.c test-select-in.sh test-select-out.sh test-select-stdin.c
+
+## end   gnulib module select-tests
+
+## begin gnulib module send-tests
+
+TESTS += test-send
+check_PROGRAMS += test-send
+test_send_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-send.c signature.h macros.h
+
+## end   gnulib module send-tests
+
+## begin gnulib module sendto-tests
+
+TESTS += test-sendto
+check_PROGRAMS += test-sendto
+test_sendto_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+EXTRA_DIST += test-sendto.c signature.h macros.h
+
+## end   gnulib module sendto-tests
+
+## begin gnulib module setenv-tests
+
+TESTS += test-setenv
+check_PROGRAMS += test-setenv
+EXTRA_DIST += test-setenv.c signature.h macros.h
+
+## end   gnulib module setenv-tests
+
+## begin gnulib module setlocale
+
+
+EXTRA_DIST += setlocale.c
+
+EXTRA_libtests_a_SOURCES += setlocale.c
+
+## end   gnulib module setlocale
+
+## begin gnulib module setlocale-null
+
+libtests_a_SOURCES += setlocale_null.c
+
+EXTRA_DIST += setlocale-lock.c setlocale_null.h windows-initguard.h
+
+EXTRA_libtests_a_SOURCES += setlocale-lock.c
+
+## end   gnulib module setlocale-null
+
+## begin gnulib module setlocale-null-tests
+
+TESTS += \
+  test-setlocale_null \
+  test-setlocale_null-mt-one \
+  test-setlocale_null-mt-all
+check_PROGRAMS += \
+  test-setlocale_null \
+  test-setlocale_null-mt-one \
+  test-setlocale_null-mt-all
+test_setlocale_null_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@
+test_setlocale_null_mt_one_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@ $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+test_setlocale_null_mt_all_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@ $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+EXTRA_DIST += test-setlocale_null.c test-setlocale_null-mt-one.c test-setlocale_null-mt-all.c
+
+## end   gnulib module setlocale-null-tests
+
+## begin gnulib module setlocale-tests
+
+TESTS += test-setlocale1.sh test-setlocale2.sh
+TESTS_ENVIRONMENT += \
+  LOCALE_FR='@LOCALE_FR@' \
+  LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
+  LOCALE_JA='@LOCALE_JA@' \
+  LOCALE_ZH_CN='@LOCALE_ZH_CN@'
+check_PROGRAMS += test-setlocale1 test-setlocale2
+test_setlocale1_LDADD = $(LDADD) @LIB_SETLOCALE@
+test_setlocale2_LDADD = $(LDADD) @LIB_SETLOCALE@
+EXTRA_DIST += test-setlocale1.sh test-setlocale1.c test-setlocale2.sh test-setlocale2.c signature.h macros.h
+
+## end   gnulib module setlocale-tests
+
+## begin gnulib module setsockopt-tests
+
+TESTS += test-setsockopt
+check_PROGRAMS += test-setsockopt
+test_setsockopt_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-setsockopt.c signature.h macros.h
+
+## end   gnulib module setsockopt-tests
+
+## begin gnulib module shutdown-tests
+
+TESTS += test-shutdown
+check_PROGRAMS += test-shutdown
+test_shutdown_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-shutdown.c signature.h macros.h
+
+## end   gnulib module shutdown-tests
+
+## begin gnulib module sigaction
+
+libtests_a_SOURCES += sig-handler.c
+
+EXTRA_DIST += sig-handler.h sigaction.c
+
+EXTRA_libtests_a_SOURCES += sigaction.c
+
+## end   gnulib module sigaction
+
+## begin gnulib module sigaction-tests
+
+TESTS += test-sigaction
+check_PROGRAMS += test-sigaction
+EXTRA_DIST += test-sigaction.c signature.h macros.h
+
+## end   gnulib module sigaction-tests
+
+## begin gnulib module signal-h-tests
+
+TESTS += test-signal-h
+check_PROGRAMS += test-signal-h
+EXTRA_DIST += test-signal-h.c
+
+## end   gnulib module signal-h-tests
+
+## begin gnulib module sigprocmask
+
+
+EXTRA_DIST += sigprocmask.c
+
+EXTRA_libtests_a_SOURCES += sigprocmask.c
+
+## end   gnulib module sigprocmask
+
+## begin gnulib module sigprocmask-tests
+
+TESTS += test-sigprocmask
+check_PROGRAMS += test-sigprocmask
+EXTRA_DIST += test-sigprocmask.c signature.h macros.h
+
+## end   gnulib module sigprocmask-tests
+
+## begin gnulib module sleep
+
+
+EXTRA_DIST += sleep.c
+
+EXTRA_libtests_a_SOURCES += sleep.c
+
+## end   gnulib module sleep
+
+## begin gnulib module sleep-tests
+
+TESTS += test-sleep
+check_PROGRAMS += test-sleep
+EXTRA_DIST += test-sleep.c signature.h macros.h
+
+## end   gnulib module sleep-tests
+
+## begin gnulib module snippet/_Noreturn
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+_NORETURN_H=$(srcdir)/_Noreturn.h
+
+EXTRA_DIST += _Noreturn.h
+
+## end   gnulib module snippet/_Noreturn
+
+## begin gnulib module snippet/arg-nonnull
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+ARG_NONNULL_H=$(srcdir)/arg-nonnull.h
+
+EXTRA_DIST += arg-nonnull.h
+
+## end   gnulib module snippet/arg-nonnull
+
+## begin gnulib module snippet/c++defs
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+CXXDEFS_H=$(srcdir)/c++defs.h
+
+EXTRA_DIST += c++defs.h
+
+## end   gnulib module snippet/c++defs
+
+## begin gnulib module snippet/warn-on-use
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+
+WARN_ON_USE_H=$(srcdir)/warn-on-use.h
+
+EXTRA_DIST += warn-on-use.h
+
+## end   gnulib module snippet/warn-on-use
+
+## begin gnulib module snprintf-tests
+
+TESTS += test-snprintf
+check_PROGRAMS += test-snprintf
+
+EXTRA_DIST += test-snprintf.c signature.h macros.h
+
+## end   gnulib module snprintf-tests
+
+## begin gnulib module sockets-tests
+
+TESTS += test-sockets
+check_PROGRAMS += test-sockets
+test_sockets_LDADD = $(LDADD) @LIBSOCKET@
+EXTRA_DIST += test-sockets.c
+
+## end   gnulib module sockets-tests
+
+## begin gnulib module stat-tests
+
+TESTS += test-stat
+check_PROGRAMS += test-stat
+test_stat_LDADD = $(LDADD) $(LIBINTL)
+EXTRA_DIST += test-stat.h test-stat.c signature.h macros.h
+
+## end   gnulib module stat-tests
+
+## begin gnulib module stat-time-tests
+
+TESTS += test-stat-time
+check_PROGRAMS += test-stat-time
+test_stat_time_LDADD = $(LDADD) $(LIB_NANOSLEEP)
+EXTRA_DIST += test-stat-time.c macros.h nap.h
+
+## end   gnulib module stat-time-tests
+
+## begin gnulib module stdalign-tests
+
+TESTS += test-stdalign
+check_PROGRAMS += test-stdalign
+EXTRA_DIST += test-stdalign.c macros.h
+
+## end   gnulib module stdalign-tests
+
+## begin gnulib module stdbool-tests
+
+TESTS += test-stdbool
+check_PROGRAMS += test-stdbool
+EXTRA_DIST += test-stdbool.c
+
+## end   gnulib module stdbool-tests
+
+## begin gnulib module stddef-tests
+
+TESTS += test-stddef
+check_PROGRAMS += test-stddef
+EXTRA_DIST += test-stddef.c
+
+## end   gnulib module stddef-tests
+
+## begin gnulib module stdint-tests
+
+TESTS += test-stdint
+check_PROGRAMS += test-stdint
+EXTRA_DIST += test-stdint.c
+
+## end   gnulib module stdint-tests
+
+## begin gnulib module stdio-tests
+
+TESTS += test-stdio
+check_PROGRAMS += test-stdio
+EXTRA_DIST += test-stdio.c
+
+## end   gnulib module stdio-tests
+
+## begin gnulib module stdlib-tests
+
+TESTS += test-stdlib
+check_PROGRAMS += test-stdlib
+EXTRA_DIST += test-stdlib.c test-sys_wait.h
+
+## end   gnulib module stdlib-tests
+
+## begin gnulib module strerror-tests
+
+TESTS += test-strerror
+check_PROGRAMS += test-strerror
+EXTRA_DIST += test-strerror.c signature.h macros.h
+
+## end   gnulib module strerror-tests
+
+## begin gnulib module strerror_r-posix
+
+
+EXTRA_DIST += strerror_r.c
+
+EXTRA_libtests_a_SOURCES += strerror_r.c
+
+## end   gnulib module strerror_r-posix
+
+## begin gnulib module strerror_r-posix-tests
+
+TESTS += test-strerror_r
+check_PROGRAMS += test-strerror_r
+EXTRA_DIST += test-strerror_r.c signature.h macros.h
+
+## end   gnulib module strerror_r-posix-tests
+
+## begin gnulib module string-tests
+
+TESTS += test-string
+check_PROGRAMS += test-string
+EXTRA_DIST += test-string.c
+
+## end   gnulib module string-tests
+
+## begin gnulib module strings-tests
+
+TESTS += test-strings
+check_PROGRAMS += test-strings
+EXTRA_DIST += test-strings.c
+
+## end   gnulib module strings-tests
+
+## begin gnulib module strnlen-tests
+
+TESTS += test-strnlen
+check_PROGRAMS += test-strnlen
+EXTRA_DIST += test-strnlen.c zerosize-ptr.h signature.h macros.h
+
+## end   gnulib module strnlen-tests
+
+## begin gnulib module strtoll
+
+
+EXTRA_DIST += strtol.c strtoll.c
+
+EXTRA_libtests_a_SOURCES += strtol.c strtoll.c
+
+## end   gnulib module strtoll
+
+## begin gnulib module strtoll-tests
+
+TESTS += test-strtoll
+check_PROGRAMS += test-strtoll
+EXTRA_DIST += test-strtoll.c signature.h macros.h
+
+## end   gnulib module strtoll-tests
+
+## begin gnulib module strverscmp-tests
+
+TESTS += test-strverscmp
+check_PROGRAMS += test-strverscmp
+EXTRA_DIST += test-strverscmp.c signature.h macros.h
+
+## end   gnulib module strverscmp-tests
+
+## begin gnulib module symlink
+
+
+EXTRA_DIST += symlink.c
+
+EXTRA_libtests_a_SOURCES += symlink.c
+
+## end   gnulib module symlink
+
+## begin gnulib module symlink-tests
+
+TESTS += test-symlink
+check_PROGRAMS += test-symlink
+EXTRA_DIST += test-symlink.h test-symlink.c signature.h macros.h
+
+## end   gnulib module symlink-tests
+
+## begin gnulib module sys_ioctl
+
+BUILT_SOURCES += sys/ioctl.h
+
+# We need the following in order to create <sys/ioctl.h> when the system
+# does not have a complete one.
+sys/ioctl.h: sys_ioctl.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''HAVE_SYS_IOCTL_H''@|$(HAVE_SYS_IOCTL_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_IOCTL_H''@|$(NEXT_SYS_IOCTL_H)|g' \
+	      -e 's/@''GNULIB_IOCTL''@/$(GL_GGL_GNULIB_IOCTL)/g' \
+	      -e 's|@''SYS_IOCTL_H_HAVE_WINSOCK2_H''@|$(SYS_IOCTL_H_HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS''@|$(SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS)|g' \
+	      -e 's|@''REPLACE_IOCTL''@|$(REPLACE_IOCTL)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_ioctl.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+MOSTLYCLEANFILES += sys/ioctl.h sys/ioctl.h-t
+MOSTLYCLEANDIRS += sys
+
+EXTRA_DIST += sys_ioctl.in.h
+
+## end   gnulib module sys_ioctl
+
+## begin gnulib module sys_ioctl-tests
+
+TESTS += test-sys_ioctl
+check_PROGRAMS += test-sys_ioctl
+EXTRA_DIST += test-sys_ioctl.c
+
+## end   gnulib module sys_ioctl-tests
+
+## begin gnulib module sys_select-tests
+
+TESTS += test-sys_select
+check_PROGRAMS += test-sys_select
+EXTRA_DIST += test-sys_select.c signature.h
+
+## end   gnulib module sys_select-tests
+
+## begin gnulib module sys_socket-tests
+
+TESTS += test-sys_socket
+check_PROGRAMS += test-sys_socket
+EXTRA_DIST += test-sys_socket.c
+
+## end   gnulib module sys_socket-tests
+
+## begin gnulib module sys_stat-tests
+
+TESTS += test-sys_stat
+check_PROGRAMS += test-sys_stat
+EXTRA_DIST += test-sys_stat.c
+
+## end   gnulib module sys_stat-tests
+
+## begin gnulib module sys_time-tests
+
+TESTS += test-sys_time
+check_PROGRAMS += test-sys_time
+EXTRA_DIST += test-sys_time.c
+
+## end   gnulib module sys_time-tests
+
+## begin gnulib module sys_types-tests
+
+TESTS += test-sys_types
+check_PROGRAMS += test-sys_types
+EXTRA_DIST += test-sys_types.c
+
+## end   gnulib module sys_types-tests
+
+## begin gnulib module sys_uio-tests
+
+TESTS += test-sys_uio
+check_PROGRAMS += test-sys_uio
+EXTRA_DIST += test-sys_uio.c
+
+## end   gnulib module sys_uio-tests
+
+## begin gnulib module test-framework-sh-tests
+
+TESTS += test-init.sh
+EXTRA_DIST += init.sh
+EXTRA_DIST += test-init.sh
+
+## end   gnulib module test-framework-sh-tests
+
+## begin gnulib module thread
+
+libtests_a_SOURCES += glthread/thread.h glthread/thread.c
+
+## end   gnulib module thread
+
+## begin gnulib module thread-optim
+
+
+EXTRA_DIST += thread-optim.h
+
+## end   gnulib module thread-optim
+
+## begin gnulib module thread-tests
+
+TESTS += test-thread_self test-thread_create
+check_PROGRAMS += test-thread_self test-thread_create
+test_thread_self_LDADD = $(LDADD) @LIBTHREAD@
+test_thread_create_LDADD = $(LDADD) @LIBMULTITHREAD@
+EXTRA_DIST += test-thread_self.c test-thread_create.c macros.h
+
+## end   gnulib module thread-tests
+
+## begin gnulib module time-tests
+
+TESTS += test-time
+check_PROGRAMS += test-time
+EXTRA_DIST += test-time.c
+
+## end   gnulib module time-tests
+
+## begin gnulib module timespec-add
+
+libtests_a_SOURCES += timespec-add.c
+
+## end   gnulib module timespec-add
+
+## begin gnulib module timespec-sub
+
+libtests_a_SOURCES += timespec-sub.c
+
+## end   gnulib module timespec-sub
+
+## begin gnulib module timespec-tests
+
+TESTS += test-timespec
+check_PROGRAMS += test-timespec
+EXTRA_DIST += test-timespec.c macros.h
+
+## end   gnulib module timespec-tests
+
+## begin gnulib module unistd-tests
+
+TESTS += test-unistd
+check_PROGRAMS += test-unistd
+EXTRA_DIST += test-unistd.c
+
+## end   gnulib module unistd-tests
+
+## begin gnulib module unsetenv-tests
+
+TESTS += test-unsetenv
+check_PROGRAMS += test-unsetenv
+EXTRA_DIST += test-unsetenv.c signature.h macros.h
+
+## end   gnulib module unsetenv-tests
+
+## begin gnulib module usleep
+
+
+EXTRA_DIST += usleep.c
+
+EXTRA_libtests_a_SOURCES += usleep.c
+
+## end   gnulib module usleep
+
+## begin gnulib module usleep-tests
+
+TESTS += test-usleep
+check_PROGRAMS += test-usleep
+EXTRA_DIST += test-usleep.c signature.h macros.h
+
+## end   gnulib module usleep-tests
+
+## begin gnulib module vasnprintf-tests
+
+TESTS += test-vasnprintf
+check_PROGRAMS += test-vasnprintf
+
+EXTRA_DIST += test-vasnprintf.c macros.h
+
+## end   gnulib module vasnprintf-tests
+
+## begin gnulib module vasprintf-tests
+
+TESTS += test-vasprintf
+check_PROGRAMS += test-vasprintf
+
+EXTRA_DIST += test-vasprintf.c signature.h macros.h
+
+## end   gnulib module vasprintf-tests
+
+## begin gnulib module verify-tests
+
+TESTS_ENVIRONMENT += MAKE='$(MAKE)'
+TESTS += test-verify test-verify.sh
+check_PROGRAMS += test-verify
+# test-verify-try is never built, but test-verify.sh needs a rule to
+# build test-verify-try.o.
+EXTRA_PROGRAMS += test-verify-try
+
+# This test expects compilation of test-verify-try.c to fail, and
+# each time it fails, the makefile rule does not perform the usual
+#  "mv -f $name.Tpo $name.po, so tell make clean to remove that file.
+MOSTLYCLEANFILES += .deps/test-verify-try.Tpo
+EXTRA_DIST += test-verify.c test-verify-try.c test-verify.sh
+
+## end   gnulib module verify-tests
+
+## begin gnulib module vma-iter
+
+libtests_a_SOURCES += vma-iter.c
+
+EXTRA_DIST += vma-iter.h
+
+## end   gnulib module vma-iter
+
+## begin gnulib module vsnprintf-tests
+
+TESTS += test-vsnprintf
+check_PROGRAMS += test-vsnprintf
+
+EXTRA_DIST += test-vsnprintf.c signature.h macros.h
+
+## end   gnulib module vsnprintf-tests
+
+## begin gnulib module wchar-tests
+
+TESTS += test-wchar
+check_PROGRAMS += test-wchar
+EXTRA_DIST += test-wchar.c
+
+## end   gnulib module wchar-tests
+
+## begin gnulib module windows-thread
+
+
+EXTRA_DIST += windows-thread.c windows-thread.h
+
+EXTRA_libtests_a_SOURCES += windows-thread.c
+
+## end   gnulib module windows-thread
+
+## begin gnulib module windows-tls
+
+
+EXTRA_DIST += windows-tls.c windows-tls.h
+
+EXTRA_libtests_a_SOURCES += windows-tls.c
+
+## end   gnulib module windows-tls
+
+## begin gnulib module xalloc-die-tests
+
+TESTS += test-xalloc-die.sh
+check_PROGRAMS += test-xalloc-die
+test_xalloc_die_LDADD = $(LDADD) @LIBINTL@
+EXTRA_DIST += test-xalloc-die.c test-xalloc-die.sh
+
+## end   gnulib module xalloc-die-tests
+
+## begin gnulib module yield
+
+libtests_a_SOURCES += glthread/yield.h
+
+## end   gnulib module yield
+
+# Clean up after Solaris cc.
+clean-local:
+	rm -rf SunWS_cache
+
+mostlyclean-local: mostlyclean-generic
+	@for dir in '' $(MOSTLYCLEANDIRS); do \
+	  if test -n "$$dir" && test -d $$dir; then \
+	    echo "rmdir $$dir"; rmdir $$dir; \
+	  fi; \
+	done; \
+	:
diff --git a/src/gl/tests/Makefile.in b/src/gl/tests/Makefile.in
new file mode 100644
index 0000000..f4d174b
--- /dev/null
+++ b/src/gl/tests/Makefile.in
@@ -0,0 +1,6834 @@
+# Makefile.in generated by automake 1.16.5 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2021 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+# Copyright (C) 2002-2021 Free Software Foundation, Inc.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this file.  If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception to the GNU General Public License,
+# this file may be distributed as part of a program that
+# contains a configuration script generated by Autoconf, under
+# the same distribution terms as the rest of that program.
+#
+# Generated by gnulib-tool.
+
+
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+TESTS = test-accept$(EXEEXT) test-alloca-opt$(EXEEXT) \
+	test-arpa_inet$(EXEEXT) test-array_list$(EXEEXT) \
+	test-binary-io.sh test-bind$(EXEEXT) test-bitrotate$(EXEEXT) \
+	test-byteswap$(EXEEXT) test-c-ctype$(EXEEXT) test-c-strcase.sh \
+	test-calloc-gnu$(EXEEXT) test-cloexec$(EXEEXT) \
+	test-close$(EXEEXT) test-connect$(EXEEXT) test-ctype$(EXEEXT) \
+	test-dup2$(EXEEXT) test-environ$(EXEEXT) test-errno$(EXEEXT) \
+	test-explicit_bzero$(EXEEXT) test-fcntl-h$(EXEEXT) \
+	test-fcntl$(EXEEXT) test-fdopen$(EXEEXT) test-fgetc$(EXEEXT) \
+	test-float$(EXEEXT) test-fopen-gnu$(EXEEXT) \
+	test-fopen$(EXEEXT) test-fpending.sh test-fputc$(EXEEXT) \
+	test-fread$(EXEEXT) test-free$(EXEEXT) test-fseek.sh \
+	test-fseek2.sh test-fseeko.sh test-fseeko2.sh test-fseeko3.sh \
+	test-fseeko4.sh test-fstat$(EXEEXT) test-ftell.sh \
+	test-ftell2.sh test-ftell3$(EXEEXT) test-ftello.sh \
+	test-ftello2.sh test-ftello3$(EXEEXT) test-ftello4.sh \
+	test-ftruncate.sh test-func$(EXEEXT) test-fwrite$(EXEEXT) \
+	test-getaddrinfo$(EXEEXT) test-getcwd-lgpl$(EXEEXT) \
+	test-getdelim$(EXEEXT) test-getdtablesize$(EXEEXT) \
+	test-getline$(EXEEXT) test-getpeername$(EXEEXT) \
+	test-getprogname$(EXEEXT) test-gettimeofday$(EXEEXT) \
+	test-hash$(EXEEXT) test-ignore-value$(EXEEXT) \
+	test-inet_ntop$(EXEEXT) test-inet_pton$(EXEEXT) \
+	test-intprops$(EXEEXT) test-inttostr$(EXEEXT) \
+	test-inttypes$(EXEEXT) test-ioctl$(EXEEXT) \
+	test-isblank$(EXEEXT) test-langinfo$(EXEEXT) \
+	test-limits-h$(EXEEXT) test-linked_list$(EXEEXT) \
+	test-listen$(EXEEXT) test-locale$(EXEEXT) \
+	test-localename$(EXEEXT) test-rwlock1$(EXEEXT) \
+	test-lock$(EXEEXT) test-once1$(EXEEXT) test-once2$(EXEEXT) \
+	test-lseek.sh test-lstat$(EXEEXT) test-malloc-gnu$(EXEEXT) \
+	test-malloca$(EXEEXT) test-memchr$(EXEEXT) \
+	test-nanosleep$(EXEEXT) test-netdb$(EXEEXT) \
+	test-netinet_in$(EXEEXT) test-nstrftime$(EXEEXT) \
+	test-open$(EXEEXT) test-parse-datetime$(EXEEXT) \
+	test-pathmax$(EXEEXT) test-perror.sh test-perror2$(EXEEXT) \
+	test-pipe$(EXEEXT) test-pthread$(EXEEXT) \
+	test-pthread-thread$(EXEEXT) test-pthread_sigmask1$(EXEEXT) \
+	test-pthread_sigmask2$(EXEEXT) test-raise$(EXEEXT) \
+	test-read-file$(EXEEXT) test-realloc-gnu$(EXEEXT) \
+	test-reallocarray$(EXEEXT) test-recv$(EXEEXT) \
+	test-recvfrom$(EXEEXT) test-sched$(EXEEXT) \
+	test-select$(EXEEXT) test-select-in.sh test-select-out.sh \
+	test-send$(EXEEXT) test-sendto$(EXEEXT) test-setenv$(EXEEXT) \
+	test-setlocale_null$(EXEEXT) \
+	test-setlocale_null-mt-one$(EXEEXT) \
+	test-setlocale_null-mt-all$(EXEEXT) test-setlocale1.sh \
+	test-setlocale2.sh test-setsockopt$(EXEEXT) \
+	test-shutdown$(EXEEXT) test-sigaction$(EXEEXT) \
+	test-signal-h$(EXEEXT) test-sigprocmask$(EXEEXT) \
+	test-sleep$(EXEEXT) test-snprintf$(EXEEXT) \
+	test-sockets$(EXEEXT) test-stat$(EXEEXT) \
+	test-stat-time$(EXEEXT) test-stdalign$(EXEEXT) \
+	test-stdbool$(EXEEXT) test-stddef$(EXEEXT) \
+	test-stdint$(EXEEXT) test-stdio$(EXEEXT) test-stdlib$(EXEEXT) \
+	test-strerror$(EXEEXT) test-strerror_r$(EXEEXT) \
+	test-string$(EXEEXT) test-strings$(EXEEXT) \
+	test-strnlen$(EXEEXT) test-strtoll$(EXEEXT) \
+	test-strverscmp$(EXEEXT) test-symlink$(EXEEXT) \
+	test-sys_ioctl$(EXEEXT) test-sys_select$(EXEEXT) \
+	test-sys_socket$(EXEEXT) test-sys_stat$(EXEEXT) \
+	test-sys_time$(EXEEXT) test-sys_types$(EXEEXT) \
+	test-sys_uio$(EXEEXT) test-init.sh test-thread_self$(EXEEXT) \
+	test-thread_create$(EXEEXT) test-time$(EXEEXT) \
+	test-timespec$(EXEEXT) test-unistd$(EXEEXT) \
+	test-unsetenv$(EXEEXT) test-usleep$(EXEEXT) \
+	test-vasnprintf$(EXEEXT) test-vasprintf$(EXEEXT) \
+	test-verify$(EXEEXT) test-verify.sh test-vsnprintf$(EXEEXT) \
+	test-wchar$(EXEEXT) test-xalloc-die.sh
+XFAIL_TESTS =
+noinst_PROGRAMS =
+check_PROGRAMS = test-accept$(EXEEXT) test-alloca-opt$(EXEEXT) \
+	test-arpa_inet$(EXEEXT) test-array_list$(EXEEXT) \
+	test-binary-io$(EXEEXT) test-bind$(EXEEXT) \
+	test-bitrotate$(EXEEXT) test-byteswap$(EXEEXT) \
+	test-c-ctype$(EXEEXT) test-c-strcasecmp$(EXEEXT) \
+	test-c-strncasecmp$(EXEEXT) test-calloc-gnu$(EXEEXT) \
+	test-cloexec$(EXEEXT) test-close$(EXEEXT) \
+	test-connect$(EXEEXT) test-ctype$(EXEEXT) test-dup2$(EXEEXT) \
+	test-environ$(EXEEXT) test-errno$(EXEEXT) \
+	test-explicit_bzero$(EXEEXT) test-fcntl-h$(EXEEXT) \
+	test-fcntl$(EXEEXT) test-fdopen$(EXEEXT) test-fgetc$(EXEEXT) \
+	test-float$(EXEEXT) test-fopen-gnu$(EXEEXT) \
+	test-fopen$(EXEEXT) test-fpending$(EXEEXT) test-fputc$(EXEEXT) \
+	test-fread$(EXEEXT) test-free$(EXEEXT) test-fseek$(EXEEXT) \
+	test-fseeko$(EXEEXT) test-fseeko3$(EXEEXT) \
+	test-fseeko4$(EXEEXT) test-fstat$(EXEEXT) test-ftell$(EXEEXT) \
+	test-ftell3$(EXEEXT) test-ftello$(EXEEXT) \
+	test-ftello3$(EXEEXT) test-ftello4$(EXEEXT) \
+	test-ftruncate$(EXEEXT) test-func$(EXEEXT) \
+	test-fwrite$(EXEEXT) test-getaddrinfo$(EXEEXT) \
+	test-getcwd-lgpl$(EXEEXT) test-getdelim$(EXEEXT) \
+	test-getdtablesize$(EXEEXT) test-getline$(EXEEXT) \
+	test-getpeername$(EXEEXT) test-getprogname$(EXEEXT) \
+	test-gettimeofday$(EXEEXT) test-hash$(EXEEXT) \
+	test-ignore-value$(EXEEXT) test-inet_ntop$(EXEEXT) \
+	test-inet_pton$(EXEEXT) test-intprops$(EXEEXT) \
+	test-inttostr$(EXEEXT) test-inttypes$(EXEEXT) \
+	test-ioctl$(EXEEXT) test-isblank$(EXEEXT) \
+	test-langinfo$(EXEEXT) test-limits-h$(EXEEXT) \
+	test-linked_list$(EXEEXT) test-listen$(EXEEXT) \
+	test-locale$(EXEEXT) test-localename$(EXEEXT) \
+	test-rwlock1$(EXEEXT) test-lock$(EXEEXT) test-once1$(EXEEXT) \
+	test-once2$(EXEEXT) test-lseek$(EXEEXT) test-lstat$(EXEEXT) \
+	test-malloc-gnu$(EXEEXT) test-malloca$(EXEEXT) \
+	test-memchr$(EXEEXT) test-nanosleep$(EXEEXT) \
+	test-netdb$(EXEEXT) test-netinet_in$(EXEEXT) \
+	test-nstrftime$(EXEEXT) test-open$(EXEEXT) \
+	test-parse-datetime$(EXEEXT) test-pathmax$(EXEEXT) \
+	test-perror$(EXEEXT) test-perror2$(EXEEXT) test-pipe$(EXEEXT) \
+	test-pthread$(EXEEXT) test-pthread-thread$(EXEEXT) \
+	test-pthread_sigmask1$(EXEEXT) test-pthread_sigmask2$(EXEEXT) \
+	test-raise$(EXEEXT) test-read-file$(EXEEXT) \
+	test-realloc-gnu$(EXEEXT) test-reallocarray$(EXEEXT) \
+	test-recv$(EXEEXT) test-recvfrom$(EXEEXT) test-sched$(EXEEXT) \
+	test-select$(EXEEXT) test-select-fd$(EXEEXT) \
+	test-select-stdin$(EXEEXT) test-send$(EXEEXT) \
+	test-sendto$(EXEEXT) test-setenv$(EXEEXT) \
+	test-setlocale_null$(EXEEXT) \
+	test-setlocale_null-mt-one$(EXEEXT) \
+	test-setlocale_null-mt-all$(EXEEXT) test-setlocale1$(EXEEXT) \
+	test-setlocale2$(EXEEXT) test-setsockopt$(EXEEXT) \
+	test-shutdown$(EXEEXT) test-sigaction$(EXEEXT) \
+	test-signal-h$(EXEEXT) test-sigprocmask$(EXEEXT) \
+	test-sleep$(EXEEXT) test-snprintf$(EXEEXT) \
+	test-sockets$(EXEEXT) test-stat$(EXEEXT) \
+	test-stat-time$(EXEEXT) test-stdalign$(EXEEXT) \
+	test-stdbool$(EXEEXT) test-stddef$(EXEEXT) \
+	test-stdint$(EXEEXT) test-stdio$(EXEEXT) test-stdlib$(EXEEXT) \
+	test-strerror$(EXEEXT) test-strerror_r$(EXEEXT) \
+	test-string$(EXEEXT) test-strings$(EXEEXT) \
+	test-strnlen$(EXEEXT) test-strtoll$(EXEEXT) \
+	test-strverscmp$(EXEEXT) test-symlink$(EXEEXT) \
+	test-sys_ioctl$(EXEEXT) test-sys_select$(EXEEXT) \
+	test-sys_socket$(EXEEXT) test-sys_stat$(EXEEXT) \
+	test-sys_time$(EXEEXT) test-sys_types$(EXEEXT) \
+	test-sys_uio$(EXEEXT) test-thread_self$(EXEEXT) \
+	test-thread_create$(EXEEXT) test-time$(EXEEXT) \
+	test-timespec$(EXEEXT) test-unistd$(EXEEXT) \
+	test-unsetenv$(EXEEXT) test-usleep$(EXEEXT) \
+	test-vasnprintf$(EXEEXT) test-vasprintf$(EXEEXT) \
+	test-verify$(EXEEXT) test-vsnprintf$(EXEEXT) \
+	test-wchar$(EXEEXT) test-xalloc-die$(EXEEXT)
+EXTRA_PROGRAMS = test-verify-try$(EXEEXT)
+subdir = src/gl/tests
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/lib/unistring/m4/gnulib-comp.m4 \
+	$(top_srcdir)/lib/unistring/m4/inline.m4 \
+	$(top_srcdir)/lib/unistring/m4/libunistring-base.m4 \
+	$(top_srcdir)/src/gl/m4/atoll.m4 \
+	$(top_srcdir)/src/gl/m4/bison.m4 \
+	$(top_srcdir)/src/gl/m4/calloc.m4 \
+	$(top_srcdir)/src/gl/m4/clock_time.m4 \
+	$(top_srcdir)/src/gl/m4/codeset.m4 \
+	$(top_srcdir)/src/gl/m4/ctype_h.m4 \
+	$(top_srcdir)/src/gl/m4/environ.m4 \
+	$(top_srcdir)/src/gl/m4/error.m4 \
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+	./$(DEPDIR)/test-read-file.Po ./$(DEPDIR)/test-realloc-gnu.Po \
+	./$(DEPDIR)/test-reallocarray.Po ./$(DEPDIR)/test-recv.Po \
+	./$(DEPDIR)/test-recvfrom.Po ./$(DEPDIR)/test-rwlock1.Po \
+	./$(DEPDIR)/test-sched.Po ./$(DEPDIR)/test-select-fd.Po \
+	./$(DEPDIR)/test-select-stdin.Po ./$(DEPDIR)/test-select.Po \
+	./$(DEPDIR)/test-send.Po ./$(DEPDIR)/test-sendto.Po \
+	./$(DEPDIR)/test-setenv.Po ./$(DEPDIR)/test-setlocale1.Po \
+	./$(DEPDIR)/test-setlocale2.Po \
+	./$(DEPDIR)/test-setlocale_null-mt-all.Po \
+	./$(DEPDIR)/test-setlocale_null-mt-one.Po \
+	./$(DEPDIR)/test-setlocale_null.Po \
+	./$(DEPDIR)/test-setsockopt.Po ./$(DEPDIR)/test-shutdown.Po \
+	./$(DEPDIR)/test-sigaction.Po ./$(DEPDIR)/test-signal-h.Po \
+	./$(DEPDIR)/test-sigprocmask.Po ./$(DEPDIR)/test-sleep.Po \
+	./$(DEPDIR)/test-snprintf.Po ./$(DEPDIR)/test-sockets.Po \
+	./$(DEPDIR)/test-stat-time.Po ./$(DEPDIR)/test-stat.Po \
+	./$(DEPDIR)/test-stdalign.Po ./$(DEPDIR)/test-stdbool.Po \
+	./$(DEPDIR)/test-stddef.Po ./$(DEPDIR)/test-stdint.Po \
+	./$(DEPDIR)/test-stdio.Po ./$(DEPDIR)/test-stdlib.Po \
+	./$(DEPDIR)/test-strerror.Po ./$(DEPDIR)/test-strerror_r.Po \
+	./$(DEPDIR)/test-string.Po ./$(DEPDIR)/test-strings.Po \
+	./$(DEPDIR)/test-strnlen.Po ./$(DEPDIR)/test-strtoll.Po \
+	./$(DEPDIR)/test-strverscmp.Po ./$(DEPDIR)/test-symlink.Po \
+	./$(DEPDIR)/test-sys_ioctl.Po ./$(DEPDIR)/test-sys_select.Po \
+	./$(DEPDIR)/test-sys_socket.Po ./$(DEPDIR)/test-sys_stat.Po \
+	./$(DEPDIR)/test-sys_time.Po ./$(DEPDIR)/test-sys_types.Po \
+	./$(DEPDIR)/test-sys_uio.Po ./$(DEPDIR)/test-thread_create.Po \
+	./$(DEPDIR)/test-thread_self.Po ./$(DEPDIR)/test-time.Po \
+	./$(DEPDIR)/test-timespec.Po ./$(DEPDIR)/test-unistd.Po \
+	./$(DEPDIR)/test-unsetenv.Po ./$(DEPDIR)/test-usleep.Po \
+	./$(DEPDIR)/test-vasnprintf.Po ./$(DEPDIR)/test-vasprintf.Po \
+	./$(DEPDIR)/test-verify-try.Po ./$(DEPDIR)/test-verify.Po \
+	./$(DEPDIR)/test-vsnprintf.Po ./$(DEPDIR)/test-wchar.Po \
+	./$(DEPDIR)/test-xalloc-die.Po ./$(DEPDIR)/timespec-add.Po \
+	./$(DEPDIR)/timespec-sub.Po ./$(DEPDIR)/uinttostr.Po \
+	./$(DEPDIR)/umaxtostr.Po ./$(DEPDIR)/usleep.Po \
+	./$(DEPDIR)/vma-iter.Po ./$(DEPDIR)/windows-thread.Po \
+	./$(DEPDIR)/windows-tls.Po glthread/$(DEPDIR)/thread.Po
+am__mv = mv -f
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) \
+	$(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \
+	$(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_@AM_V@)
+am__v_CC_ = $(am__v_CC_@AM_DEFAULT_V@)
+am__v_CC_0 = @echo "  CC      " $@;
+am__v_CC_1 = 
+CCLD = $(CC)
+LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_@AM_V@)
+am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
+am__v_CCLD_0 = @echo "  CCLD    " $@;
+am__v_CCLD_1 = 
+SOURCES = $(libtests_a_SOURCES) $(EXTRA_libtests_a_SOURCES) \
+	test-accept.c test-alloca-opt.c test-arpa_inet.c \
+	test-array_list.c test-binary-io.c test-bind.c \
+	test-bitrotate.c test-byteswap.c test-c-ctype.c \
+	test-c-strcasecmp.c test-c-strncasecmp.c test-calloc-gnu.c \
+	test-cloexec.c test-close.c test-connect.c test-ctype.c \
+	test-dup2.c test-environ.c test-errno.c test-explicit_bzero.c \
+	test-fcntl.c test-fcntl-h.c test-fdopen.c test-fgetc.c \
+	test-float.c test-fopen.c test-fopen-gnu.c test-fpending.c \
+	test-fputc.c test-fread.c test-free.c test-fseek.c \
+	test-fseeko.c test-fseeko3.c test-fseeko4.c test-fstat.c \
+	test-ftell.c test-ftell3.c test-ftello.c test-ftello3.c \
+	test-ftello4.c test-ftruncate.c test-func.c test-fwrite.c \
+	test-getaddrinfo.c test-getcwd-lgpl.c test-getdelim.c \
+	test-getdtablesize.c test-getline.c test-getpeername.c \
+	test-getprogname.c test-gettimeofday.c test-hash.c \
+	test-ignore-value.c test-inet_ntop.c test-inet_pton.c \
+	test-intprops.c test-inttostr.c test-inttypes.c test-ioctl.c \
+	test-isblank.c test-langinfo.c test-limits-h.c \
+	test-linked_list.c test-listen.c test-locale.c \
+	test-localename.c test-lock.c test-lseek.c test-lstat.c \
+	test-malloc-gnu.c test-malloca.c test-memchr.c \
+	test-nanosleep.c test-netdb.c test-netinet_in.c \
+	test-nstrftime.c $(test_once1_SOURCES) $(test_once2_SOURCES) \
+	test-open.c test-parse-datetime.c test-pathmax.c test-perror.c \
+	test-perror2.c test-pipe.c test-pthread.c \
+	test-pthread-thread.c test-pthread_sigmask1.c \
+	test-pthread_sigmask2.c test-raise.c test-read-file.c \
+	test-realloc-gnu.c test-reallocarray.c test-recv.c \
+	test-recvfrom.c test-rwlock1.c test-sched.c test-select.c \
+	test-select-fd.c test-select-stdin.c test-send.c test-sendto.c \
+	test-setenv.c test-setlocale1.c test-setlocale2.c \
+	test-setlocale_null.c test-setlocale_null-mt-all.c \
+	test-setlocale_null-mt-one.c test-setsockopt.c test-shutdown.c \
+	test-sigaction.c test-signal-h.c test-sigprocmask.c \
+	test-sleep.c test-snprintf.c test-sockets.c test-stat.c \
+	test-stat-time.c test-stdalign.c test-stdbool.c test-stddef.c \
+	test-stdint.c test-stdio.c test-stdlib.c test-strerror.c \
+	test-strerror_r.c test-string.c test-strings.c test-strnlen.c \
+	test-strtoll.c test-strverscmp.c test-symlink.c \
+	test-sys_ioctl.c test-sys_select.c test-sys_socket.c \
+	test-sys_stat.c test-sys_time.c test-sys_types.c \
+	test-sys_uio.c test-thread_create.c test-thread_self.c \
+	test-time.c test-timespec.c test-unistd.c test-unsetenv.c \
+	test-usleep.c test-vasnprintf.c test-vasprintf.c test-verify.c \
+	test-verify-try.c test-vsnprintf.c test-wchar.c \
+	test-xalloc-die.c
+DIST_SOURCES = $(libtests_a_SOURCES) $(EXTRA_libtests_a_SOURCES) \
+	test-accept.c test-alloca-opt.c test-arpa_inet.c \
+	test-array_list.c test-binary-io.c test-bind.c \
+	test-bitrotate.c test-byteswap.c test-c-ctype.c \
+	test-c-strcasecmp.c test-c-strncasecmp.c test-calloc-gnu.c \
+	test-cloexec.c test-close.c test-connect.c test-ctype.c \
+	test-dup2.c test-environ.c test-errno.c test-explicit_bzero.c \
+	test-fcntl.c test-fcntl-h.c test-fdopen.c test-fgetc.c \
+	test-float.c test-fopen.c test-fopen-gnu.c test-fpending.c \
+	test-fputc.c test-fread.c test-free.c test-fseek.c \
+	test-fseeko.c test-fseeko3.c test-fseeko4.c test-fstat.c \
+	test-ftell.c test-ftell3.c test-ftello.c test-ftello3.c \
+	test-ftello4.c test-ftruncate.c test-func.c test-fwrite.c \
+	test-getaddrinfo.c test-getcwd-lgpl.c test-getdelim.c \
+	test-getdtablesize.c test-getline.c test-getpeername.c \
+	test-getprogname.c test-gettimeofday.c test-hash.c \
+	test-ignore-value.c test-inet_ntop.c test-inet_pton.c \
+	test-intprops.c test-inttostr.c test-inttypes.c test-ioctl.c \
+	test-isblank.c test-langinfo.c test-limits-h.c \
+	test-linked_list.c test-listen.c test-locale.c \
+	test-localename.c test-lock.c test-lseek.c test-lstat.c \
+	test-malloc-gnu.c test-malloca.c test-memchr.c \
+	test-nanosleep.c test-netdb.c test-netinet_in.c \
+	test-nstrftime.c $(test_once1_SOURCES) $(test_once2_SOURCES) \
+	test-open.c test-parse-datetime.c test-pathmax.c test-perror.c \
+	test-perror2.c test-pipe.c test-pthread.c \
+	test-pthread-thread.c test-pthread_sigmask1.c \
+	test-pthread_sigmask2.c test-raise.c test-read-file.c \
+	test-realloc-gnu.c test-reallocarray.c test-recv.c \
+	test-recvfrom.c test-rwlock1.c test-sched.c test-select.c \
+	test-select-fd.c test-select-stdin.c test-send.c test-sendto.c \
+	test-setenv.c test-setlocale1.c test-setlocale2.c \
+	test-setlocale_null.c test-setlocale_null-mt-all.c \
+	test-setlocale_null-mt-one.c test-setsockopt.c test-shutdown.c \
+	test-sigaction.c test-signal-h.c test-sigprocmask.c \
+	test-sleep.c test-snprintf.c test-sockets.c test-stat.c \
+	test-stat-time.c test-stdalign.c test-stdbool.c test-stddef.c \
+	test-stdint.c test-stdio.c test-stdlib.c test-strerror.c \
+	test-strerror_r.c test-string.c test-strings.c test-strnlen.c \
+	test-strtoll.c test-strverscmp.c test-symlink.c \
+	test-sys_ioctl.c test-sys_select.c test-sys_socket.c \
+	test-sys_stat.c test-sys_time.c test-sys_types.c \
+	test-sys_uio.c test-thread_create.c test-thread_self.c \
+	test-time.c test-timespec.c test-unistd.c test-unsetenv.c \
+	test-usleep.c test-vasnprintf.c test-vasprintf.c test-verify.c \
+	test-verify-try.c test-vsnprintf.c test-wchar.c \
+	test-xalloc-die.c
+RECURSIVE_TARGETS = all-recursive check-recursive cscopelist-recursive \
+	ctags-recursive dvi-recursive html-recursive info-recursive \
+	install-data-recursive install-dvi-recursive \
+	install-exec-recursive install-html-recursive \
+	install-info-recursive install-pdf-recursive \
+	install-ps-recursive install-recursive installcheck-recursive \
+	installdirs-recursive pdf-recursive ps-recursive \
+	tags-recursive uninstall-recursive
+am__can_run_installinfo = \
+  case $$AM_UPDATE_INFO_DIR in \
+    n|no|NO) false;; \
+    *) (install-info --version) >/dev/null 2>&1;; \
+  esac
+HEADERS = $(noinst_HEADERS)
+RECURSIVE_CLEAN_TARGETS = mostlyclean-recursive clean-recursive	\
+  distclean-recursive maintainer-clean-recursive
+am__recursive_targets = \
+  $(RECURSIVE_TARGETS) \
+  $(RECURSIVE_CLEAN_TARGETS) \
+  $(am__extra_recursive_targets)
+AM_RECURSIVE_TARGETS = $(am__recursive_targets:-recursive=) TAGS CTAGS \
+	check recheck distdir distdir-am
+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
+# Read a list of newline-separated strings from the standard input,
+# and print each of them once, without duplicates.  Input order is
+# *not* preserved.
+am__uniquify_input = $(AWK) '\
+  BEGIN { nonempty = 0; } \
+  { items[$$0] = 1; nonempty = 1; } \
+  END { if (nonempty) { for (i in items) print i; }; } \
+'
+# Make sure the list of sources is unique.  This is necessary because,
+# e.g., the same source file might be shared among _SOURCES variables
+# for different programs/libraries.
+am__define_uniq_tagged_files = \
+  list='$(am__tagged_files)'; \
+  unique=`for i in $$list; do \
+    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+  done | $(am__uniquify_input)`
+am__tty_colors_dummy = \
+  mgn= red= grn= lgn= blu= brg= std=; \
+  am__color_tests=no
+am__tty_colors = { \
+  $(am__tty_colors_dummy); \
+  if test "X$(AM_COLOR_TESTS)" = Xno; then \
+    am__color_tests=no; \
+  elif test "X$(AM_COLOR_TESTS)" = Xalways; then \
+    am__color_tests=yes; \
+  elif test "X$$TERM" != Xdumb && { test -t 1; } 2>/dev/null; then \
+    am__color_tests=yes; \
+  fi; \
+  if test $$am__color_tests = yes; then \
+    red='[0;31m'; \
+    grn='[0;32m'; \
+    lgn='[1;32m'; \
+    blu='[1;34m'; \
+    mgn='[0;35m'; \
+    brg='[1m'; \
+    std='[m'; \
+  fi; \
+}
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+    *) f=$$p;; \
+  esac;
+am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
+am__install_max = 40
+am__nobase_strip_setup = \
+  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
+am__nobase_strip = \
+  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
+am__nobase_list = $(am__nobase_strip_setup); \
+  for p in $$list; do echo "$$p $$p"; done | \
+  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+    if (++n[$$2] == $(am__install_max)) \
+      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
+    END { for (dir in files) print dir, files[dir] }'
+am__base_list = \
+  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
+  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+am__uninstall_files_from_dir = { \
+  test -z "$$files" \
+    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
+    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
+         $(am__cd) "$$dir" && rm -f $$files; }; \
+  }
+am__recheck_rx = ^[ 	]*:recheck:[ 	]*
+am__global_test_result_rx = ^[ 	]*:global-test-result:[ 	]*
+am__copy_in_global_log_rx = ^[ 	]*:copy-in-global-log:[ 	]*
+# A command that, given a newline-separated list of test names on the
+# standard input, print the name of the tests that are to be re-run
+# upon "make recheck".
+am__list_recheck_tests = $(AWK) '{ \
+  recheck = 1; \
+  while ((rc = (getline line < ($$0 ".trs"))) != 0) \
+    { \
+      if (rc < 0) \
+        { \
+          if ((getline line2 < ($$0 ".log")) < 0) \
+	    recheck = 0; \
+          break; \
+        } \
+      else if (line ~ /$(am__recheck_rx)[nN][Oo]/) \
+        { \
+          recheck = 0; \
+          break; \
+        } \
+      else if (line ~ /$(am__recheck_rx)[yY][eE][sS]/) \
+        { \
+          break; \
+        } \
+    }; \
+  if (recheck) \
+    print $$0; \
+  close ($$0 ".trs"); \
+  close ($$0 ".log"); \
+}'
+# A command that, given a newline-separated list of test names on the
+# standard input, create the global log from their .trs and .log files.
+am__create_global_log = $(AWK) ' \
+function fatal(msg) \
+{ \
+  print "fatal: making $@: " msg | "cat >&2"; \
+  exit 1; \
+} \
+function rst_section(header) \
+{ \
+  print header; \
+  len = length(header); \
+  for (i = 1; i <= len; i = i + 1) \
+    printf "="; \
+  printf "\n\n"; \
+} \
+{ \
+  copy_in_global_log = 1; \
+  global_test_result = "RUN"; \
+  while ((rc = (getline line < ($$0 ".trs"))) != 0) \
+    { \
+      if (rc < 0) \
+         fatal("failed to read from " $$0 ".trs"); \
+      if (line ~ /$(am__global_test_result_rx)/) \
+        { \
+          sub("$(am__global_test_result_rx)", "", line); \
+          sub("[ 	]*$$", "", line); \
+          global_test_result = line; \
+        } \
+      else if (line ~ /$(am__copy_in_global_log_rx)[nN][oO]/) \
+        copy_in_global_log = 0; \
+    }; \
+  if (copy_in_global_log) \
+    { \
+      rst_section(global_test_result ": " $$0); \
+      while ((rc = (getline line < ($$0 ".log"))) != 0) \
+      { \
+        if (rc < 0) \
+          fatal("failed to read from " $$0 ".log"); \
+        print line; \
+      }; \
+      printf "\n"; \
+    }; \
+  close ($$0 ".trs"); \
+  close ($$0 ".log"); \
+}'
+# Restructured Text title.
+am__rst_title = { sed 's/.*/   &   /;h;s/./=/g;p;x;s/ *$$//;p;g' && echo; }
+# Solaris 10 'make', and several other traditional 'make' implementations,
+# pass "-e" to $(SHELL), and POSIX 2008 even requires this.  Work around it
+# by disabling -e (using the XSI extension "set +e") if it's set.
+am__sh_e_setup = case $$- in *e*) set +e;; esac
+# Default flags passed to test drivers.
+am__common_driver_flags = \
+  --color-tests "$$am__color_tests" \
+  --enable-hard-errors "$$am__enable_hard_errors" \
+  --expect-failure "$$am__expect_failure"
+# To be inserted before the command running the test.  Creates the
+# directory for the log if needed.  Stores in $dir the directory
+# containing $f, in $tst the test, in $log the log.  Executes the
+# developer- defined test setup AM_TESTS_ENVIRONMENT (if any), and
+# passes TESTS_ENVIRONMENT.  Set up options for the wrapper that
+# will run the test scripts (or their associated LOG_COMPILER, if
+# thy have one).
+am__check_pre = \
+$(am__sh_e_setup);					\
+$(am__vpath_adj_setup) $(am__vpath_adj)			\
+$(am__tty_colors);					\
+srcdir=$(srcdir); export srcdir;			\
+case "$@" in						\
+  */*) am__odir=`echo "./$@" | sed 's|/[^/]*$$||'`;;	\
+    *) am__odir=.;; 					\
+esac;							\
+test "x$$am__odir" = x"." || test -d "$$am__odir" 	\
+  || $(MKDIR_P) "$$am__odir" || exit $$?;		\
+if test -f "./$$f"; then dir=./;			\
+elif test -f "$$f"; then dir=;				\
+else dir="$(srcdir)/"; fi;				\
+tst=$$dir$$f; log='$@'; 				\
+if test -n '$(DISABLE_HARD_ERRORS)'; then		\
+  am__enable_hard_errors=no; 				\
+else							\
+  am__enable_hard_errors=yes; 				\
+fi; 							\
+case " $(XFAIL_TESTS) " in				\
+  *[\ \	]$$f[\ \	]* | *[\ \	]$$dir$$f[\ \	]*) \
+    am__expect_failure=yes;;				\
+  *)							\
+    am__expect_failure=no;;				\
+esac; 							\
+$(AM_TESTS_ENVIRONMENT) $(TESTS_ENVIRONMENT)
+# A shell command to get the names of the tests scripts with any registered
+# extension removed (i.e., equivalently, the names of the test logs, with
+# the '.log' extension removed).  The result is saved in the shell variable
+# '$bases'.  This honors runtime overriding of TESTS and TEST_LOGS.  Sadly,
+# we cannot use something simpler, involving e.g., "$(TEST_LOGS:.log=)",
+# since that might cause problem with VPATH rewrites for suffix-less tests.
+# See also 'test-harness-vpath-rewrite.sh' and 'test-trs-basic.sh'.
+am__set_TESTS_bases = \
+  bases='$(TEST_LOGS)'; \
+  bases=`for i in $$bases; do echo $$i; done | sed 's/\.log$$//'`; \
+  bases=`echo $$bases`
+AM_TESTSUITE_SUMMARY_HEADER = ' for $(PACKAGE_STRING)'
+RECHECK_LOGS = $(TEST_LOGS)
+TEST_SUITE_LOG = test-suite.log
+TEST_EXTENSIONS = @EXEEXT@ .test
+LOG_DRIVER = $(SHELL) $(top_srcdir)/build-aux/test-driver
+LOG_COMPILE = $(LOG_COMPILER) $(AM_LOG_FLAGS) $(LOG_FLAGS)
+am__set_b = \
+  case '$@' in \
+    */*) \
+      case '$*' in \
+        */*) b='$*';; \
+          *) b=`echo '$@' | sed 's/\.log$$//'`; \
+       esac;; \
+    *) \
+      b='$*';; \
+  esac
+am__test_logs1 = $(TESTS:=.log)
+am__test_logs2 = $(am__test_logs1:@EXEEXT@.log=.log)
+TEST_LOGS = $(am__test_logs2:.test.log=.log)
+TEST_LOG_DRIVER = $(SHELL) $(top_srcdir)/build-aux/test-driver
+TEST_LOG_COMPILE = $(TEST_LOG_COMPILER) $(AM_TEST_LOG_FLAGS) \
+	$(TEST_LOG_FLAGS)
+DIST_SUBDIRS = $(SUBDIRS)
+am__DIST_COMMON = $(srcdir)/Makefile.in \
+	$(top_srcdir)/build-aux/depcomp \
+	$(top_srcdir)/build-aux/test-driver
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+am__relativize = \
+  dir0=`pwd`; \
+  sed_first='s,^\([^/]*\)/.*$$,\1,'; \
+  sed_rest='s,^[^/]*/*,,'; \
+  sed_last='s,^.*/\([^/]*\)$$,\1,'; \
+  sed_butlast='s,/*[^/]*$$,,'; \
+  while test -n "$$dir1"; do \
+    first=`echo "$$dir1" | sed -e "$$sed_first"`; \
+    if test "$$first" != "."; then \
+      if test "$$first" = ".."; then \
+        dir2=`echo "$$dir0" | sed -e "$$sed_last"`/"$$dir2"; \
+        dir0=`echo "$$dir0" | sed -e "$$sed_butlast"`; \
+      else \
+        first2=`echo "$$dir2" | sed -e "$$sed_first"`; \
+        if test "$$first2" = "$$first"; then \
+          dir2=`echo "$$dir2" | sed -e "$$sed_rest"`; \
+        else \
+          dir2="../$$dir2"; \
+        fi; \
+        dir0="$$dir0"/"$$first"; \
+      fi; \
+    fi; \
+    dir1=`echo "$$dir1" | sed -e "$$sed_rest"`; \
+  done; \
+  reldir="$$dir2"
+AARCH64_CCASFLAGS = @AARCH64_CCASFLAGS@
+ACLOCAL = @ACLOCAL@
+ALLOCA = @ALLOCA@
+ALLOCA_H = @ALLOCA_H@
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+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+AM_VALGRINDFLAGS = @AM_VALGRINDFLAGS@
+APPLE_UNIVERSAL_BUILD = @APPLE_UNIVERSAL_BUILD@
+AR = @AR@
+ARFLAGS = @ARFLAGS@
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+BITSIZEOF_PTRDIFF_T = @BITSIZEOF_PTRDIFF_T@
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+BITSIZEOF_WCHAR_T = @BITSIZEOF_WCHAR_T@
+BITSIZEOF_WINT_T = @BITSIZEOF_WINT_T@
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+CFLAGS = @CFLAGS@
+CFLAG_VISIBILITY = @CFLAG_VISIBILITY@
+CMOCKA_CFLAGS = @CMOCKA_CFLAGS@
+CMOCKA_LIBS = @CMOCKA_LIBS@
+CODE_COVERAGE_CFLAGS = @CODE_COVERAGE_CFLAGS@
+CODE_COVERAGE_CPPFLAGS = @CODE_COVERAGE_CPPFLAGS@
+CODE_COVERAGE_CXXFLAGS = @CODE_COVERAGE_CXXFLAGS@
+CODE_COVERAGE_ENABLED = @CODE_COVERAGE_ENABLED@
+CODE_COVERAGE_LIBS = @CODE_COVERAGE_LIBS@
+CONFIG_INCLUDE = @CONFIG_INCLUDE@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CRYWRAP_PATCHLEVEL = @CRYWRAP_PATCHLEVEL@
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+CYGPATH_W = @CYGPATH_W@
+DEFAULT_VALGRINDFLAGS = @DEFAULT_VALGRINDFLAGS@
+DEFS = @DEFS@ -DEXEEXT=\"@EXEEXT@\"
+DEPDIR = @DEPDIR@
+DLLTOOL = @DLLTOOL@
+DLL_SSL_VERSION = @DLL_SSL_VERSION@
+DLL_VERSION = @DLL_VERSION@
+DSYMUTIL = @DSYMUTIL@
+DUMPBIN = @DUMPBIN@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
+EGREP = @EGREP@
+EMULTIHOP_HIDDEN = @EMULTIHOP_HIDDEN@
+EMULTIHOP_VALUE = @EMULTIHOP_VALUE@
+ENABLE_PADLOCK = @ENABLE_PADLOCK@
+ENOLINK_HIDDEN = @ENOLINK_HIDDEN@
+ENOLINK_VALUE = @ENOLINK_VALUE@
+EOVERFLOW_HIDDEN = @EOVERFLOW_HIDDEN@
+EOVERFLOW_VALUE = @EOVERFLOW_VALUE@
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+ETAGS = @ETAGS@
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+FGREP = @FGREP@
+FILECMD = @FILECMD@
+FIPS140_LIBS = @FIPS140_LIBS@
+FLOAT_H = @FLOAT_H@
+GCOV = @GCOV@
+GENHTML = @GENHTML@
+GETADDRINFO_LIB = @GETADDRINFO_LIB@
+GETTEXT_MACRO_VERSION = @GETTEXT_MACRO_VERSION@
+GL_GGL_GNULIB_ACCEPT = @GL_GGL_GNULIB_ACCEPT@
+GL_GGL_GNULIB_ACCEPT4 = @GL_GGL_GNULIB_ACCEPT4@
+GL_GGL_GNULIB_ACCESS = @GL_GGL_GNULIB_ACCESS@
+GL_GGL_GNULIB_ALIGNED_ALLOC = @GL_GGL_GNULIB_ALIGNED_ALLOC@
+GL_GGL_GNULIB_ATOLL = @GL_GGL_GNULIB_ATOLL@
+GL_GGL_GNULIB_BIND = @GL_GGL_GNULIB_BIND@
+GL_GGL_GNULIB_BTOWC = @GL_GGL_GNULIB_BTOWC@
+GL_GGL_GNULIB_CALLOC_POSIX = @GL_GGL_GNULIB_CALLOC_POSIX@
+GL_GGL_GNULIB_CANONICALIZE_FILE_NAME = @GL_GGL_GNULIB_CANONICALIZE_FILE_NAME@
+GL_GGL_GNULIB_CHDIR = @GL_GGL_GNULIB_CHDIR@
+GL_GGL_GNULIB_CHOWN = @GL_GGL_GNULIB_CHOWN@
+GL_GGL_GNULIB_CLOSE = @GL_GGL_GNULIB_CLOSE@
+GL_GGL_GNULIB_CONNECT = @GL_GGL_GNULIB_CONNECT@
+GL_GGL_GNULIB_COPY_FILE_RANGE = @GL_GGL_GNULIB_COPY_FILE_RANGE@
+GL_GGL_GNULIB_CREAT = @GL_GGL_GNULIB_CREAT@
+GL_GGL_GNULIB_CTIME = @GL_GGL_GNULIB_CTIME@
+GL_GGL_GNULIB_DPRINTF = @GL_GGL_GNULIB_DPRINTF@
+GL_GGL_GNULIB_DUP = @GL_GGL_GNULIB_DUP@
+GL_GGL_GNULIB_DUP2 = @GL_GGL_GNULIB_DUP2@
+GL_GGL_GNULIB_DUP3 = @GL_GGL_GNULIB_DUP3@
+GL_GGL_GNULIB_DUPLOCALE = @GL_GGL_GNULIB_DUPLOCALE@
+GL_GGL_GNULIB_ENVIRON = @GL_GGL_GNULIB_ENVIRON@
+GL_GGL_GNULIB_EUIDACCESS = @GL_GGL_GNULIB_EUIDACCESS@
+GL_GGL_GNULIB_EXECL = @GL_GGL_GNULIB_EXECL@
+GL_GGL_GNULIB_EXECLE = @GL_GGL_GNULIB_EXECLE@
+GL_GGL_GNULIB_EXECLP = @GL_GGL_GNULIB_EXECLP@
+GL_GGL_GNULIB_EXECV = @GL_GGL_GNULIB_EXECV@
+GL_GGL_GNULIB_EXECVE = @GL_GGL_GNULIB_EXECVE@
+GL_GGL_GNULIB_EXECVP = @GL_GGL_GNULIB_EXECVP@
+GL_GGL_GNULIB_EXECVPE = @GL_GGL_GNULIB_EXECVPE@
+GL_GGL_GNULIB_EXPLICIT_BZERO = @GL_GGL_GNULIB_EXPLICIT_BZERO@
+GL_GGL_GNULIB_FACCESSAT = @GL_GGL_GNULIB_FACCESSAT@
+GL_GGL_GNULIB_FCHDIR = @GL_GGL_GNULIB_FCHDIR@
+GL_GGL_GNULIB_FCHMODAT = @GL_GGL_GNULIB_FCHMODAT@
+GL_GGL_GNULIB_FCHOWNAT = @GL_GGL_GNULIB_FCHOWNAT@
+GL_GGL_GNULIB_FCLOSE = @GL_GGL_GNULIB_FCLOSE@
+GL_GGL_GNULIB_FCNTL = @GL_GGL_GNULIB_FCNTL@
+GL_GGL_GNULIB_FDATASYNC = @GL_GGL_GNULIB_FDATASYNC@
+GL_GGL_GNULIB_FDOPEN = @GL_GGL_GNULIB_FDOPEN@
+GL_GGL_GNULIB_FFLUSH = @GL_GGL_GNULIB_FFLUSH@
+GL_GGL_GNULIB_FFS = @GL_GGL_GNULIB_FFS@
+GL_GGL_GNULIB_FFSL = @GL_GGL_GNULIB_FFSL@
+GL_GGL_GNULIB_FFSLL = @GL_GGL_GNULIB_FFSLL@
+GL_GGL_GNULIB_FGETC = @GL_GGL_GNULIB_FGETC@
+GL_GGL_GNULIB_FGETS = @GL_GGL_GNULIB_FGETS@
+GL_GGL_GNULIB_FOPEN = @GL_GGL_GNULIB_FOPEN@
+GL_GGL_GNULIB_FPRINTF = @GL_GGL_GNULIB_FPRINTF@
+GL_GGL_GNULIB_FPRINTF_POSIX = @GL_GGL_GNULIB_FPRINTF_POSIX@
+GL_GGL_GNULIB_FPURGE = @GL_GGL_GNULIB_FPURGE@
+GL_GGL_GNULIB_FPUTC = @GL_GGL_GNULIB_FPUTC@
+GL_GGL_GNULIB_FPUTS = @GL_GGL_GNULIB_FPUTS@
+GL_GGL_GNULIB_FREAD = @GL_GGL_GNULIB_FREAD@
+GL_GGL_GNULIB_FREE_POSIX = @GL_GGL_GNULIB_FREE_POSIX@
+GL_GGL_GNULIB_FREOPEN = @GL_GGL_GNULIB_FREOPEN@
+GL_GGL_GNULIB_FSCANF = @GL_GGL_GNULIB_FSCANF@
+GL_GGL_GNULIB_FSEEK = @GL_GGL_GNULIB_FSEEK@
+GL_GGL_GNULIB_FSEEKO = @GL_GGL_GNULIB_FSEEKO@
+GL_GGL_GNULIB_FSTAT = @GL_GGL_GNULIB_FSTAT@
+GL_GGL_GNULIB_FSTATAT = @GL_GGL_GNULIB_FSTATAT@
+GL_GGL_GNULIB_FSYNC = @GL_GGL_GNULIB_FSYNC@
+GL_GGL_GNULIB_FTELL = @GL_GGL_GNULIB_FTELL@
+GL_GGL_GNULIB_FTELLO = @GL_GGL_GNULIB_FTELLO@
+GL_GGL_GNULIB_FTRUNCATE = @GL_GGL_GNULIB_FTRUNCATE@
+GL_GGL_GNULIB_FUTIMENS = @GL_GGL_GNULIB_FUTIMENS@
+GL_GGL_GNULIB_FWRITE = @GL_GGL_GNULIB_FWRITE@
+GL_GGL_GNULIB_GETADDRINFO = @GL_GGL_GNULIB_GETADDRINFO@
+GL_GGL_GNULIB_GETC = @GL_GGL_GNULIB_GETC@
+GL_GGL_GNULIB_GETCHAR = @GL_GGL_GNULIB_GETCHAR@
+GL_GGL_GNULIB_GETCWD = @GL_GGL_GNULIB_GETCWD@
+GL_GGL_GNULIB_GETDELIM = @GL_GGL_GNULIB_GETDELIM@
+GL_GGL_GNULIB_GETDOMAINNAME = @GL_GGL_GNULIB_GETDOMAINNAME@
+GL_GGL_GNULIB_GETDTABLESIZE = @GL_GGL_GNULIB_GETDTABLESIZE@
+GL_GGL_GNULIB_GETENTROPY = @GL_GGL_GNULIB_GETENTROPY@
+GL_GGL_GNULIB_GETGROUPS = @GL_GGL_GNULIB_GETGROUPS@
+GL_GGL_GNULIB_GETHOSTNAME = @GL_GGL_GNULIB_GETHOSTNAME@
+GL_GGL_GNULIB_GETLINE = @GL_GGL_GNULIB_GETLINE@
+GL_GGL_GNULIB_GETLOADAVG = @GL_GGL_GNULIB_GETLOADAVG@
+GL_GGL_GNULIB_GETLOGIN = @GL_GGL_GNULIB_GETLOGIN@
+GL_GGL_GNULIB_GETLOGIN_R = @GL_GGL_GNULIB_GETLOGIN_R@
+GL_GGL_GNULIB_GETOPT_POSIX = @GL_GGL_GNULIB_GETOPT_POSIX@
+GL_GGL_GNULIB_GETPAGESIZE = @GL_GGL_GNULIB_GETPAGESIZE@
+GL_GGL_GNULIB_GETPASS = @GL_GGL_GNULIB_GETPASS@
+GL_GGL_GNULIB_GETPEERNAME = @GL_GGL_GNULIB_GETPEERNAME@
+GL_GGL_GNULIB_GETSOCKNAME = @GL_GGL_GNULIB_GETSOCKNAME@
+GL_GGL_GNULIB_GETSOCKOPT = @GL_GGL_GNULIB_GETSOCKOPT@
+GL_GGL_GNULIB_GETSUBOPT = @GL_GGL_GNULIB_GETSUBOPT@
+GL_GGL_GNULIB_GETTIMEOFDAY = @GL_GGL_GNULIB_GETTIMEOFDAY@
+GL_GGL_GNULIB_GETUMASK = @GL_GGL_GNULIB_GETUMASK@
+GL_GGL_GNULIB_GETUSERSHELL = @GL_GGL_GNULIB_GETUSERSHELL@
+GL_GGL_GNULIB_GRANTPT = @GL_GGL_GNULIB_GRANTPT@
+GL_GGL_GNULIB_GROUP_MEMBER = @GL_GGL_GNULIB_GROUP_MEMBER@
+GL_GGL_GNULIB_IMAXABS = @GL_GGL_GNULIB_IMAXABS@
+GL_GGL_GNULIB_IMAXDIV = @GL_GGL_GNULIB_IMAXDIV@
+GL_GGL_GNULIB_INET_NTOP = @GL_GGL_GNULIB_INET_NTOP@
+GL_GGL_GNULIB_INET_PTON = @GL_GGL_GNULIB_INET_PTON@
+GL_GGL_GNULIB_IOCTL = @GL_GGL_GNULIB_IOCTL@
+GL_GGL_GNULIB_ISATTY = @GL_GGL_GNULIB_ISATTY@
+GL_GGL_GNULIB_ISBLANK = @GL_GGL_GNULIB_ISBLANK@
+GL_GGL_GNULIB_LCHMOD = @GL_GGL_GNULIB_LCHMOD@
+GL_GGL_GNULIB_LCHOWN = @GL_GGL_GNULIB_LCHOWN@
+GL_GGL_GNULIB_LINK = @GL_GGL_GNULIB_LINK@
+GL_GGL_GNULIB_LINKAT = @GL_GGL_GNULIB_LINKAT@
+GL_GGL_GNULIB_LISTEN = @GL_GGL_GNULIB_LISTEN@
+GL_GGL_GNULIB_LOCALECONV = @GL_GGL_GNULIB_LOCALECONV@
+GL_GGL_GNULIB_LOCALENAME = @GL_GGL_GNULIB_LOCALENAME@
+GL_GGL_GNULIB_LOCALTIME = @GL_GGL_GNULIB_LOCALTIME@
+GL_GGL_GNULIB_LSEEK = @GL_GGL_GNULIB_LSEEK@
+GL_GGL_GNULIB_LSTAT = @GL_GGL_GNULIB_LSTAT@
+GL_GGL_GNULIB_MALLOC_POSIX = @GL_GGL_GNULIB_MALLOC_POSIX@
+GL_GGL_GNULIB_MBRLEN = @GL_GGL_GNULIB_MBRLEN@
+GL_GGL_GNULIB_MBRTOWC = @GL_GGL_GNULIB_MBRTOWC@
+GL_GGL_GNULIB_MBSCASECMP = @GL_GGL_GNULIB_MBSCASECMP@
+GL_GGL_GNULIB_MBSCASESTR = @GL_GGL_GNULIB_MBSCASESTR@
+GL_GGL_GNULIB_MBSCHR = @GL_GGL_GNULIB_MBSCHR@
+GL_GGL_GNULIB_MBSCSPN = @GL_GGL_GNULIB_MBSCSPN@
+GL_GGL_GNULIB_MBSINIT = @GL_GGL_GNULIB_MBSINIT@
+GL_GGL_GNULIB_MBSLEN = @GL_GGL_GNULIB_MBSLEN@
+GL_GGL_GNULIB_MBSNCASECMP = @GL_GGL_GNULIB_MBSNCASECMP@
+GL_GGL_GNULIB_MBSNLEN = @GL_GGL_GNULIB_MBSNLEN@
+GL_GGL_GNULIB_MBSNRTOWCS = @GL_GGL_GNULIB_MBSNRTOWCS@
+GL_GGL_GNULIB_MBSPBRK = @GL_GGL_GNULIB_MBSPBRK@
+GL_GGL_GNULIB_MBSPCASECMP = @GL_GGL_GNULIB_MBSPCASECMP@
+GL_GGL_GNULIB_MBSRCHR = @GL_GGL_GNULIB_MBSRCHR@
+GL_GGL_GNULIB_MBSRTOWCS = @GL_GGL_GNULIB_MBSRTOWCS@
+GL_GGL_GNULIB_MBSSEP = @GL_GGL_GNULIB_MBSSEP@
+GL_GGL_GNULIB_MBSSPN = @GL_GGL_GNULIB_MBSSPN@
+GL_GGL_GNULIB_MBSSTR = @GL_GGL_GNULIB_MBSSTR@
+GL_GGL_GNULIB_MBSTOK_R = @GL_GGL_GNULIB_MBSTOK_R@
+GL_GGL_GNULIB_MBTOWC = @GL_GGL_GNULIB_MBTOWC@
+GL_GGL_GNULIB_MDA_ACCESS = @GL_GGL_GNULIB_MDA_ACCESS@
+GL_GGL_GNULIB_MDA_CHDIR = @GL_GGL_GNULIB_MDA_CHDIR@
+GL_GGL_GNULIB_MDA_CHMOD = @GL_GGL_GNULIB_MDA_CHMOD@
+GL_GGL_GNULIB_MDA_CLOSE = @GL_GGL_GNULIB_MDA_CLOSE@
+GL_GGL_GNULIB_MDA_CREAT = @GL_GGL_GNULIB_MDA_CREAT@
+GL_GGL_GNULIB_MDA_DUP = @GL_GGL_GNULIB_MDA_DUP@
+GL_GGL_GNULIB_MDA_DUP2 = @GL_GGL_GNULIB_MDA_DUP2@
+GL_GGL_GNULIB_MDA_ECVT = @GL_GGL_GNULIB_MDA_ECVT@
+GL_GGL_GNULIB_MDA_EXECL = @GL_GGL_GNULIB_MDA_EXECL@
+GL_GGL_GNULIB_MDA_EXECLE = @GL_GGL_GNULIB_MDA_EXECLE@
+GL_GGL_GNULIB_MDA_EXECLP = @GL_GGL_GNULIB_MDA_EXECLP@
+GL_GGL_GNULIB_MDA_EXECV = @GL_GGL_GNULIB_MDA_EXECV@
+GL_GGL_GNULIB_MDA_EXECVE = @GL_GGL_GNULIB_MDA_EXECVE@
+GL_GGL_GNULIB_MDA_EXECVP = @GL_GGL_GNULIB_MDA_EXECVP@
+GL_GGL_GNULIB_MDA_EXECVPE = @GL_GGL_GNULIB_MDA_EXECVPE@
+GL_GGL_GNULIB_MDA_FCLOSEALL = @GL_GGL_GNULIB_MDA_FCLOSEALL@
+GL_GGL_GNULIB_MDA_FCVT = @GL_GGL_GNULIB_MDA_FCVT@
+GL_GGL_GNULIB_MDA_FDOPEN = @GL_GGL_GNULIB_MDA_FDOPEN@
+GL_GGL_GNULIB_MDA_FILENO = @GL_GGL_GNULIB_MDA_FILENO@
+GL_GGL_GNULIB_MDA_GCVT = @GL_GGL_GNULIB_MDA_GCVT@
+GL_GGL_GNULIB_MDA_GETCWD = @GL_GGL_GNULIB_MDA_GETCWD@
+GL_GGL_GNULIB_MDA_GETPID = @GL_GGL_GNULIB_MDA_GETPID@
+GL_GGL_GNULIB_MDA_GETW = @GL_GGL_GNULIB_MDA_GETW@
+GL_GGL_GNULIB_MDA_ISATTY = @GL_GGL_GNULIB_MDA_ISATTY@
+GL_GGL_GNULIB_MDA_LSEEK = @GL_GGL_GNULIB_MDA_LSEEK@
+GL_GGL_GNULIB_MDA_MEMCCPY = @GL_GGL_GNULIB_MDA_MEMCCPY@
+GL_GGL_GNULIB_MDA_MKDIR = @GL_GGL_GNULIB_MDA_MKDIR@
+GL_GGL_GNULIB_MDA_MKTEMP = @GL_GGL_GNULIB_MDA_MKTEMP@
+GL_GGL_GNULIB_MDA_OPEN = @GL_GGL_GNULIB_MDA_OPEN@
+GL_GGL_GNULIB_MDA_PUTENV = @GL_GGL_GNULIB_MDA_PUTENV@
+GL_GGL_GNULIB_MDA_PUTW = @GL_GGL_GNULIB_MDA_PUTW@
+GL_GGL_GNULIB_MDA_READ = @GL_GGL_GNULIB_MDA_READ@
+GL_GGL_GNULIB_MDA_RMDIR = @GL_GGL_GNULIB_MDA_RMDIR@
+GL_GGL_GNULIB_MDA_STRDUP = @GL_GGL_GNULIB_MDA_STRDUP@
+GL_GGL_GNULIB_MDA_SWAB = @GL_GGL_GNULIB_MDA_SWAB@
+GL_GGL_GNULIB_MDA_TEMPNAM = @GL_GGL_GNULIB_MDA_TEMPNAM@
+GL_GGL_GNULIB_MDA_TZSET = @GL_GGL_GNULIB_MDA_TZSET@
+GL_GGL_GNULIB_MDA_UMASK = @GL_GGL_GNULIB_MDA_UMASK@
+GL_GGL_GNULIB_MDA_UNLINK = @GL_GGL_GNULIB_MDA_UNLINK@
+GL_GGL_GNULIB_MDA_WCSDUP = @GL_GGL_GNULIB_MDA_WCSDUP@
+GL_GGL_GNULIB_MDA_WRITE = @GL_GGL_GNULIB_MDA_WRITE@
+GL_GGL_GNULIB_MEMCHR = @GL_GGL_GNULIB_MEMCHR@
+GL_GGL_GNULIB_MEMMEM = @GL_GGL_GNULIB_MEMMEM@
+GL_GGL_GNULIB_MEMPCPY = @GL_GGL_GNULIB_MEMPCPY@
+GL_GGL_GNULIB_MEMRCHR = @GL_GGL_GNULIB_MEMRCHR@
+GL_GGL_GNULIB_MKDIR = @GL_GGL_GNULIB_MKDIR@
+GL_GGL_GNULIB_MKDIRAT = @GL_GGL_GNULIB_MKDIRAT@
+GL_GGL_GNULIB_MKDTEMP = @GL_GGL_GNULIB_MKDTEMP@
+GL_GGL_GNULIB_MKFIFO = @GL_GGL_GNULIB_MKFIFO@
+GL_GGL_GNULIB_MKFIFOAT = @GL_GGL_GNULIB_MKFIFOAT@
+GL_GGL_GNULIB_MKNOD = @GL_GGL_GNULIB_MKNOD@
+GL_GGL_GNULIB_MKNODAT = @GL_GGL_GNULIB_MKNODAT@
+GL_GGL_GNULIB_MKOSTEMP = @GL_GGL_GNULIB_MKOSTEMP@
+GL_GGL_GNULIB_MKOSTEMPS = @GL_GGL_GNULIB_MKOSTEMPS@
+GL_GGL_GNULIB_MKSTEMP = @GL_GGL_GNULIB_MKSTEMP@
+GL_GGL_GNULIB_MKSTEMPS = @GL_GGL_GNULIB_MKSTEMPS@
+GL_GGL_GNULIB_MKTIME = @GL_GGL_GNULIB_MKTIME@
+GL_GGL_GNULIB_NANOSLEEP = @GL_GGL_GNULIB_NANOSLEEP@
+GL_GGL_GNULIB_NL_LANGINFO = @GL_GGL_GNULIB_NL_LANGINFO@
+GL_GGL_GNULIB_NONBLOCKING = @GL_GGL_GNULIB_NONBLOCKING@
+GL_GGL_GNULIB_OBSTACK_PRINTF = @GL_GGL_GNULIB_OBSTACK_PRINTF@
+GL_GGL_GNULIB_OBSTACK_PRINTF_POSIX = @GL_GGL_GNULIB_OBSTACK_PRINTF_POSIX@
+GL_GGL_GNULIB_OPEN = @GL_GGL_GNULIB_OPEN@
+GL_GGL_GNULIB_OPENAT = @GL_GGL_GNULIB_OPENAT@
+GL_GGL_GNULIB_OVERRIDES_STRUCT_STAT = @GL_GGL_GNULIB_OVERRIDES_STRUCT_STAT@
+GL_GGL_GNULIB_PCLOSE = @GL_GGL_GNULIB_PCLOSE@
+GL_GGL_GNULIB_PERROR = @GL_GGL_GNULIB_PERROR@
+GL_GGL_GNULIB_PIPE = @GL_GGL_GNULIB_PIPE@
+GL_GGL_GNULIB_PIPE2 = @GL_GGL_GNULIB_PIPE2@
+GL_GGL_GNULIB_POPEN = @GL_GGL_GNULIB_POPEN@
+GL_GGL_GNULIB_POSIX_MEMALIGN = @GL_GGL_GNULIB_POSIX_MEMALIGN@
+GL_GGL_GNULIB_POSIX_OPENPT = @GL_GGL_GNULIB_POSIX_OPENPT@
+GL_GGL_GNULIB_PREAD = @GL_GGL_GNULIB_PREAD@
+GL_GGL_GNULIB_PRINTF = @GL_GGL_GNULIB_PRINTF@
+GL_GGL_GNULIB_PRINTF_POSIX = @GL_GGL_GNULIB_PRINTF_POSIX@
+GL_GGL_GNULIB_PSELECT = @GL_GGL_GNULIB_PSELECT@
+GL_GGL_GNULIB_PTHREAD_COND = @GL_GGL_GNULIB_PTHREAD_COND@
+GL_GGL_GNULIB_PTHREAD_MUTEX = @GL_GGL_GNULIB_PTHREAD_MUTEX@
+GL_GGL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK = @GL_GGL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK@
+GL_GGL_GNULIB_PTHREAD_ONCE = @GL_GGL_GNULIB_PTHREAD_ONCE@
+GL_GGL_GNULIB_PTHREAD_RWLOCK = @GL_GGL_GNULIB_PTHREAD_RWLOCK@
+GL_GGL_GNULIB_PTHREAD_SIGMASK = @GL_GGL_GNULIB_PTHREAD_SIGMASK@
+GL_GGL_GNULIB_PTHREAD_SPIN = @GL_GGL_GNULIB_PTHREAD_SPIN@
+GL_GGL_GNULIB_PTHREAD_THREAD = @GL_GGL_GNULIB_PTHREAD_THREAD@
+GL_GGL_GNULIB_PTHREAD_TSS = @GL_GGL_GNULIB_PTHREAD_TSS@
+GL_GGL_GNULIB_PTSNAME = @GL_GGL_GNULIB_PTSNAME@
+GL_GGL_GNULIB_PTSNAME_R = @GL_GGL_GNULIB_PTSNAME_R@
+GL_GGL_GNULIB_PUTC = @GL_GGL_GNULIB_PUTC@
+GL_GGL_GNULIB_PUTCHAR = @GL_GGL_GNULIB_PUTCHAR@
+GL_GGL_GNULIB_PUTENV = @GL_GGL_GNULIB_PUTENV@
+GL_GGL_GNULIB_PUTS = @GL_GGL_GNULIB_PUTS@
+GL_GGL_GNULIB_PWRITE = @GL_GGL_GNULIB_PWRITE@
+GL_GGL_GNULIB_QSORT_R = @GL_GGL_GNULIB_QSORT_R@
+GL_GGL_GNULIB_RAISE = @GL_GGL_GNULIB_RAISE@
+GL_GGL_GNULIB_RANDOM = @GL_GGL_GNULIB_RANDOM@
+GL_GGL_GNULIB_RANDOM_R = @GL_GGL_GNULIB_RANDOM_R@
+GL_GGL_GNULIB_RAWMEMCHR = @GL_GGL_GNULIB_RAWMEMCHR@
+GL_GGL_GNULIB_READ = @GL_GGL_GNULIB_READ@
+GL_GGL_GNULIB_READLINK = @GL_GGL_GNULIB_READLINK@
+GL_GGL_GNULIB_READLINKAT = @GL_GGL_GNULIB_READLINKAT@
+GL_GGL_GNULIB_REALLOCARRAY = @GL_GGL_GNULIB_REALLOCARRAY@
+GL_GGL_GNULIB_REALLOC_POSIX = @GL_GGL_GNULIB_REALLOC_POSIX@
+GL_GGL_GNULIB_REALPATH = @GL_GGL_GNULIB_REALPATH@
+GL_GGL_GNULIB_RECV = @GL_GGL_GNULIB_RECV@
+GL_GGL_GNULIB_RECVFROM = @GL_GGL_GNULIB_RECVFROM@
+GL_GGL_GNULIB_REMOVE = @GL_GGL_GNULIB_REMOVE@
+GL_GGL_GNULIB_RENAME = @GL_GGL_GNULIB_RENAME@
+GL_GGL_GNULIB_RENAMEAT = @GL_GGL_GNULIB_RENAMEAT@
+GL_GGL_GNULIB_RMDIR = @GL_GGL_GNULIB_RMDIR@
+GL_GGL_GNULIB_RPMATCH = @GL_GGL_GNULIB_RPMATCH@
+GL_GGL_GNULIB_SCANF = @GL_GGL_GNULIB_SCANF@
+GL_GGL_GNULIB_SCHED_YIELD = @GL_GGL_GNULIB_SCHED_YIELD@
+GL_GGL_GNULIB_SECURE_GETENV = @GL_GGL_GNULIB_SECURE_GETENV@
+GL_GGL_GNULIB_SELECT = @GL_GGL_GNULIB_SELECT@
+GL_GGL_GNULIB_SEND = @GL_GGL_GNULIB_SEND@
+GL_GGL_GNULIB_SENDTO = @GL_GGL_GNULIB_SENDTO@
+GL_GGL_GNULIB_SETENV = @GL_GGL_GNULIB_SETENV@
+GL_GGL_GNULIB_SETHOSTNAME = @GL_GGL_GNULIB_SETHOSTNAME@
+GL_GGL_GNULIB_SETLOCALE = @GL_GGL_GNULIB_SETLOCALE@
+GL_GGL_GNULIB_SETLOCALE_NULL = @GL_GGL_GNULIB_SETLOCALE_NULL@
+GL_GGL_GNULIB_SETSOCKOPT = @GL_GGL_GNULIB_SETSOCKOPT@
+GL_GGL_GNULIB_SHUTDOWN = @GL_GGL_GNULIB_SHUTDOWN@
+GL_GGL_GNULIB_SIGABBREV_NP = @GL_GGL_GNULIB_SIGABBREV_NP@
+GL_GGL_GNULIB_SIGACTION = @GL_GGL_GNULIB_SIGACTION@
+GL_GGL_GNULIB_SIGDESCR_NP = @GL_GGL_GNULIB_SIGDESCR_NP@
+GL_GGL_GNULIB_SIGNAL_H_SIGPIPE = @GL_GGL_GNULIB_SIGNAL_H_SIGPIPE@
+GL_GGL_GNULIB_SIGPROCMASK = @GL_GGL_GNULIB_SIGPROCMASK@
+GL_GGL_GNULIB_SLEEP = @GL_GGL_GNULIB_SLEEP@
+GL_GGL_GNULIB_SNPRINTF = @GL_GGL_GNULIB_SNPRINTF@
+GL_GGL_GNULIB_SOCKET = @GL_GGL_GNULIB_SOCKET@
+GL_GGL_GNULIB_SPRINTF_POSIX = @GL_GGL_GNULIB_SPRINTF_POSIX@
+GL_GGL_GNULIB_STAT = @GL_GGL_GNULIB_STAT@
+GL_GGL_GNULIB_STDIO_H_NONBLOCKING = @GL_GGL_GNULIB_STDIO_H_NONBLOCKING@
+GL_GGL_GNULIB_STDIO_H_SIGPIPE = @GL_GGL_GNULIB_STDIO_H_SIGPIPE@
+GL_GGL_GNULIB_STPCPY = @GL_GGL_GNULIB_STPCPY@
+GL_GGL_GNULIB_STPNCPY = @GL_GGL_GNULIB_STPNCPY@
+GL_GGL_GNULIB_STRCASESTR = @GL_GGL_GNULIB_STRCASESTR@
+GL_GGL_GNULIB_STRCHRNUL = @GL_GGL_GNULIB_STRCHRNUL@
+GL_GGL_GNULIB_STRDUP = @GL_GGL_GNULIB_STRDUP@
+GL_GGL_GNULIB_STRERROR = @GL_GGL_GNULIB_STRERROR@
+GL_GGL_GNULIB_STRERRORNAME_NP = @GL_GGL_GNULIB_STRERRORNAME_NP@
+GL_GGL_GNULIB_STRERROR_R = @GL_GGL_GNULIB_STRERROR_R@
+GL_GGL_GNULIB_STRFTIME = @GL_GGL_GNULIB_STRFTIME@
+GL_GGL_GNULIB_STRNCAT = @GL_GGL_GNULIB_STRNCAT@
+GL_GGL_GNULIB_STRNDUP = @GL_GGL_GNULIB_STRNDUP@
+GL_GGL_GNULIB_STRNLEN = @GL_GGL_GNULIB_STRNLEN@
+GL_GGL_GNULIB_STRPBRK = @GL_GGL_GNULIB_STRPBRK@
+GL_GGL_GNULIB_STRPTIME = @GL_GGL_GNULIB_STRPTIME@
+GL_GGL_GNULIB_STRSEP = @GL_GGL_GNULIB_STRSEP@
+GL_GGL_GNULIB_STRSIGNAL = @GL_GGL_GNULIB_STRSIGNAL@
+GL_GGL_GNULIB_STRSTR = @GL_GGL_GNULIB_STRSTR@
+GL_GGL_GNULIB_STRTOD = @GL_GGL_GNULIB_STRTOD@
+GL_GGL_GNULIB_STRTOIMAX = @GL_GGL_GNULIB_STRTOIMAX@
+GL_GGL_GNULIB_STRTOK_R = @GL_GGL_GNULIB_STRTOK_R@
+GL_GGL_GNULIB_STRTOL = @GL_GGL_GNULIB_STRTOL@
+GL_GGL_GNULIB_STRTOLD = @GL_GGL_GNULIB_STRTOLD@
+GL_GGL_GNULIB_STRTOLL = @GL_GGL_GNULIB_STRTOLL@
+GL_GGL_GNULIB_STRTOUL = @GL_GGL_GNULIB_STRTOUL@
+GL_GGL_GNULIB_STRTOULL = @GL_GGL_GNULIB_STRTOULL@
+GL_GGL_GNULIB_STRTOUMAX = @GL_GGL_GNULIB_STRTOUMAX@
+GL_GGL_GNULIB_STRVERSCMP = @GL_GGL_GNULIB_STRVERSCMP@
+GL_GGL_GNULIB_SYMLINK = @GL_GGL_GNULIB_SYMLINK@
+GL_GGL_GNULIB_SYMLINKAT = @GL_GGL_GNULIB_SYMLINKAT@
+GL_GGL_GNULIB_SYSTEM_POSIX = @GL_GGL_GNULIB_SYSTEM_POSIX@
+GL_GGL_GNULIB_TIMEGM = @GL_GGL_GNULIB_TIMEGM@
+GL_GGL_GNULIB_TIMESPEC_GET = @GL_GGL_GNULIB_TIMESPEC_GET@
+GL_GGL_GNULIB_TIME_R = @GL_GGL_GNULIB_TIME_R@
+GL_GGL_GNULIB_TIME_RZ = @GL_GGL_GNULIB_TIME_RZ@
+GL_GGL_GNULIB_TMPFILE = @GL_GGL_GNULIB_TMPFILE@
+GL_GGL_GNULIB_TRUNCATE = @GL_GGL_GNULIB_TRUNCATE@
+GL_GGL_GNULIB_TTYNAME_R = @GL_GGL_GNULIB_TTYNAME_R@
+GL_GGL_GNULIB_TZSET = @GL_GGL_GNULIB_TZSET@
+GL_GGL_GNULIB_UNISTD_H_NONBLOCKING = @GL_GGL_GNULIB_UNISTD_H_NONBLOCKING@
+GL_GGL_GNULIB_UNISTD_H_SIGPIPE = @GL_GGL_GNULIB_UNISTD_H_SIGPIPE@
+GL_GGL_GNULIB_UNLINK = @GL_GGL_GNULIB_UNLINK@
+GL_GGL_GNULIB_UNLINKAT = @GL_GGL_GNULIB_UNLINKAT@
+GL_GGL_GNULIB_UNLOCKPT = @GL_GGL_GNULIB_UNLOCKPT@
+GL_GGL_GNULIB_UNSETENV = @GL_GGL_GNULIB_UNSETENV@
+GL_GGL_GNULIB_USLEEP = @GL_GGL_GNULIB_USLEEP@
+GL_GGL_GNULIB_UTIMENSAT = @GL_GGL_GNULIB_UTIMENSAT@
+GL_GGL_GNULIB_VASPRINTF = @GL_GGL_GNULIB_VASPRINTF@
+GL_GGL_GNULIB_VDPRINTF = @GL_GGL_GNULIB_VDPRINTF@
+GL_GGL_GNULIB_VFPRINTF = @GL_GGL_GNULIB_VFPRINTF@
+GL_GGL_GNULIB_VFPRINTF_POSIX = @GL_GGL_GNULIB_VFPRINTF_POSIX@
+GL_GGL_GNULIB_VFSCANF = @GL_GGL_GNULIB_VFSCANF@
+GL_GGL_GNULIB_VPRINTF = @GL_GGL_GNULIB_VPRINTF@
+GL_GGL_GNULIB_VPRINTF_POSIX = @GL_GGL_GNULIB_VPRINTF_POSIX@
+GL_GGL_GNULIB_VSCANF = @GL_GGL_GNULIB_VSCANF@
+GL_GGL_GNULIB_VSNPRINTF = @GL_GGL_GNULIB_VSNPRINTF@
+GL_GGL_GNULIB_VSPRINTF_POSIX = @GL_GGL_GNULIB_VSPRINTF_POSIX@
+GL_GGL_GNULIB_WCPCPY = @GL_GGL_GNULIB_WCPCPY@
+GL_GGL_GNULIB_WCPNCPY = @GL_GGL_GNULIB_WCPNCPY@
+GL_GGL_GNULIB_WCRTOMB = @GL_GGL_GNULIB_WCRTOMB@
+GL_GGL_GNULIB_WCSCASECMP = @GL_GGL_GNULIB_WCSCASECMP@
+GL_GGL_GNULIB_WCSCAT = @GL_GGL_GNULIB_WCSCAT@
+GL_GGL_GNULIB_WCSCHR = @GL_GGL_GNULIB_WCSCHR@
+GL_GGL_GNULIB_WCSCMP = @GL_GGL_GNULIB_WCSCMP@
+GL_GGL_GNULIB_WCSCOLL = @GL_GGL_GNULIB_WCSCOLL@
+GL_GGL_GNULIB_WCSCPY = @GL_GGL_GNULIB_WCSCPY@
+GL_GGL_GNULIB_WCSCSPN = @GL_GGL_GNULIB_WCSCSPN@
+GL_GGL_GNULIB_WCSDUP = @GL_GGL_GNULIB_WCSDUP@
+GL_GGL_GNULIB_WCSFTIME = @GL_GGL_GNULIB_WCSFTIME@
+GL_GGL_GNULIB_WCSLEN = @GL_GGL_GNULIB_WCSLEN@
+GL_GGL_GNULIB_WCSNCASECMP = @GL_GGL_GNULIB_WCSNCASECMP@
+GL_GGL_GNULIB_WCSNCAT = @GL_GGL_GNULIB_WCSNCAT@
+GL_GGL_GNULIB_WCSNCMP = @GL_GGL_GNULIB_WCSNCMP@
+GL_GGL_GNULIB_WCSNCPY = @GL_GGL_GNULIB_WCSNCPY@
+GL_GGL_GNULIB_WCSNLEN = @GL_GGL_GNULIB_WCSNLEN@
+GL_GGL_GNULIB_WCSNRTOMBS = @GL_GGL_GNULIB_WCSNRTOMBS@
+GL_GGL_GNULIB_WCSPBRK = @GL_GGL_GNULIB_WCSPBRK@
+GL_GGL_GNULIB_WCSRCHR = @GL_GGL_GNULIB_WCSRCHR@
+GL_GGL_GNULIB_WCSRTOMBS = @GL_GGL_GNULIB_WCSRTOMBS@
+GL_GGL_GNULIB_WCSSPN = @GL_GGL_GNULIB_WCSSPN@
+GL_GGL_GNULIB_WCSSTR = @GL_GGL_GNULIB_WCSSTR@
+GL_GGL_GNULIB_WCSTOK = @GL_GGL_GNULIB_WCSTOK@
+GL_GGL_GNULIB_WCSWIDTH = @GL_GGL_GNULIB_WCSWIDTH@
+GL_GGL_GNULIB_WCSXFRM = @GL_GGL_GNULIB_WCSXFRM@
+GL_GGL_GNULIB_WCTOB = @GL_GGL_GNULIB_WCTOB@
+GL_GGL_GNULIB_WCTOMB = @GL_GGL_GNULIB_WCTOMB@
+GL_GGL_GNULIB_WCWIDTH = @GL_GGL_GNULIB_WCWIDTH@
+GL_GGL_GNULIB_WMEMCHR = @GL_GGL_GNULIB_WMEMCHR@
+GL_GGL_GNULIB_WMEMCMP = @GL_GGL_GNULIB_WMEMCMP@
+GL_GGL_GNULIB_WMEMCPY = @GL_GGL_GNULIB_WMEMCPY@
+GL_GGL_GNULIB_WMEMMOVE = @GL_GGL_GNULIB_WMEMMOVE@
+GL_GGL_GNULIB_WMEMPCPY = @GL_GGL_GNULIB_WMEMPCPY@
+GL_GGL_GNULIB_WMEMSET = @GL_GGL_GNULIB_WMEMSET@
+GL_GGL_GNULIB_WRITE = @GL_GGL_GNULIB_WRITE@
+GL_GGL_GNULIB__EXIT = @GL_GGL_GNULIB__EXIT@
+GL_GNULIB_ACCEPT = @GL_GNULIB_ACCEPT@
+GL_GNULIB_ACCEPT4 = @GL_GNULIB_ACCEPT4@
+GL_GNULIB_ACCESS = @GL_GNULIB_ACCESS@
+GL_GNULIB_ALIGNED_ALLOC = @GL_GNULIB_ALIGNED_ALLOC@
+GL_GNULIB_ATOLL = @GL_GNULIB_ATOLL@
+GL_GNULIB_BIND = @GL_GNULIB_BIND@
+GL_GNULIB_BTOWC = @GL_GNULIB_BTOWC@
+GL_GNULIB_CALLOC_POSIX = @GL_GNULIB_CALLOC_POSIX@
+GL_GNULIB_CANONICALIZE_FILE_NAME = @GL_GNULIB_CANONICALIZE_FILE_NAME@
+GL_GNULIB_CHDIR = @GL_GNULIB_CHDIR@
+GL_GNULIB_CHOWN = @GL_GNULIB_CHOWN@
+GL_GNULIB_CLOSE = @GL_GNULIB_CLOSE@
+GL_GNULIB_CONNECT = @GL_GNULIB_CONNECT@
+GL_GNULIB_COPY_FILE_RANGE = @GL_GNULIB_COPY_FILE_RANGE@
+GL_GNULIB_CREAT = @GL_GNULIB_CREAT@
+GL_GNULIB_CTIME = @GL_GNULIB_CTIME@
+GL_GNULIB_DPRINTF = @GL_GNULIB_DPRINTF@
+GL_GNULIB_DUP = @GL_GNULIB_DUP@
+GL_GNULIB_DUP2 = @GL_GNULIB_DUP2@
+GL_GNULIB_DUP3 = @GL_GNULIB_DUP3@
+GL_GNULIB_ENVIRON = @GL_GNULIB_ENVIRON@
+GL_GNULIB_EUIDACCESS = @GL_GNULIB_EUIDACCESS@
+GL_GNULIB_EXECL = @GL_GNULIB_EXECL@
+GL_GNULIB_EXECLE = @GL_GNULIB_EXECLE@
+GL_GNULIB_EXECLP = @GL_GNULIB_EXECLP@
+GL_GNULIB_EXECV = @GL_GNULIB_EXECV@
+GL_GNULIB_EXECVE = @GL_GNULIB_EXECVE@
+GL_GNULIB_EXECVP = @GL_GNULIB_EXECVP@
+GL_GNULIB_EXECVPE = @GL_GNULIB_EXECVPE@
+GL_GNULIB_EXPLICIT_BZERO = @GL_GNULIB_EXPLICIT_BZERO@
+GL_GNULIB_FACCESSAT = @GL_GNULIB_FACCESSAT@
+GL_GNULIB_FCHDIR = @GL_GNULIB_FCHDIR@
+GL_GNULIB_FCHMODAT = @GL_GNULIB_FCHMODAT@
+GL_GNULIB_FCHOWNAT = @GL_GNULIB_FCHOWNAT@
+GL_GNULIB_FCLOSE = @GL_GNULIB_FCLOSE@
+GL_GNULIB_FCNTL = @GL_GNULIB_FCNTL@
+GL_GNULIB_FDATASYNC = @GL_GNULIB_FDATASYNC@
+GL_GNULIB_FDOPEN = @GL_GNULIB_FDOPEN@
+GL_GNULIB_FFLUSH = @GL_GNULIB_FFLUSH@
+GL_GNULIB_FFS = @GL_GNULIB_FFS@
+GL_GNULIB_FFSL = @GL_GNULIB_FFSL@
+GL_GNULIB_FFSLL = @GL_GNULIB_FFSLL@
+GL_GNULIB_FGETC = @GL_GNULIB_FGETC@
+GL_GNULIB_FGETS = @GL_GNULIB_FGETS@
+GL_GNULIB_FOPEN = @GL_GNULIB_FOPEN@
+GL_GNULIB_FPRINTF = @GL_GNULIB_FPRINTF@
+GL_GNULIB_FPRINTF_POSIX = @GL_GNULIB_FPRINTF_POSIX@
+GL_GNULIB_FPURGE = @GL_GNULIB_FPURGE@
+GL_GNULIB_FPUTC = @GL_GNULIB_FPUTC@
+GL_GNULIB_FPUTS = @GL_GNULIB_FPUTS@
+GL_GNULIB_FREAD = @GL_GNULIB_FREAD@
+GL_GNULIB_FREE_POSIX = @GL_GNULIB_FREE_POSIX@
+GL_GNULIB_FREOPEN = @GL_GNULIB_FREOPEN@
+GL_GNULIB_FSCANF = @GL_GNULIB_FSCANF@
+GL_GNULIB_FSEEK = @GL_GNULIB_FSEEK@
+GL_GNULIB_FSEEKO = @GL_GNULIB_FSEEKO@
+GL_GNULIB_FSTAT = @GL_GNULIB_FSTAT@
+GL_GNULIB_FSTATAT = @GL_GNULIB_FSTATAT@
+GL_GNULIB_FSYNC = @GL_GNULIB_FSYNC@
+GL_GNULIB_FTELL = @GL_GNULIB_FTELL@
+GL_GNULIB_FTELLO = @GL_GNULIB_FTELLO@
+GL_GNULIB_FTRUNCATE = @GL_GNULIB_FTRUNCATE@
+GL_GNULIB_FUTIMENS = @GL_GNULIB_FUTIMENS@
+GL_GNULIB_FWRITE = @GL_GNULIB_FWRITE@
+GL_GNULIB_GETADDRINFO = @GL_GNULIB_GETADDRINFO@
+GL_GNULIB_GETC = @GL_GNULIB_GETC@
+GL_GNULIB_GETCHAR = @GL_GNULIB_GETCHAR@
+GL_GNULIB_GETCWD = @GL_GNULIB_GETCWD@
+GL_GNULIB_GETDELIM = @GL_GNULIB_GETDELIM@
+GL_GNULIB_GETDOMAINNAME = @GL_GNULIB_GETDOMAINNAME@
+GL_GNULIB_GETDTABLESIZE = @GL_GNULIB_GETDTABLESIZE@
+GL_GNULIB_GETENTROPY = @GL_GNULIB_GETENTROPY@
+GL_GNULIB_GETGROUPS = @GL_GNULIB_GETGROUPS@
+GL_GNULIB_GETHOSTNAME = @GL_GNULIB_GETHOSTNAME@
+GL_GNULIB_GETLINE = @GL_GNULIB_GETLINE@
+GL_GNULIB_GETLOADAVG = @GL_GNULIB_GETLOADAVG@
+GL_GNULIB_GETLOGIN = @GL_GNULIB_GETLOGIN@
+GL_GNULIB_GETLOGIN_R = @GL_GNULIB_GETLOGIN_R@
+GL_GNULIB_GETOPT_POSIX = @GL_GNULIB_GETOPT_POSIX@
+GL_GNULIB_GETPAGESIZE = @GL_GNULIB_GETPAGESIZE@
+GL_GNULIB_GETPASS = @GL_GNULIB_GETPASS@
+GL_GNULIB_GETPEERNAME = @GL_GNULIB_GETPEERNAME@
+GL_GNULIB_GETSOCKNAME = @GL_GNULIB_GETSOCKNAME@
+GL_GNULIB_GETSOCKOPT = @GL_GNULIB_GETSOCKOPT@
+GL_GNULIB_GETSUBOPT = @GL_GNULIB_GETSUBOPT@
+GL_GNULIB_GETTIMEOFDAY = @GL_GNULIB_GETTIMEOFDAY@
+GL_GNULIB_GETUMASK = @GL_GNULIB_GETUMASK@
+GL_GNULIB_GETUSERSHELL = @GL_GNULIB_GETUSERSHELL@
+GL_GNULIB_GRANTPT = @GL_GNULIB_GRANTPT@
+GL_GNULIB_GROUP_MEMBER = @GL_GNULIB_GROUP_MEMBER@
+GL_GNULIB_IMAXABS = @GL_GNULIB_IMAXABS@
+GL_GNULIB_IMAXDIV = @GL_GNULIB_IMAXDIV@
+GL_GNULIB_INET_NTOP = @GL_GNULIB_INET_NTOP@
+GL_GNULIB_INET_PTON = @GL_GNULIB_INET_PTON@
+GL_GNULIB_ISATTY = @GL_GNULIB_ISATTY@
+GL_GNULIB_LCHMOD = @GL_GNULIB_LCHMOD@
+GL_GNULIB_LCHOWN = @GL_GNULIB_LCHOWN@
+GL_GNULIB_LINK = @GL_GNULIB_LINK@
+GL_GNULIB_LINKAT = @GL_GNULIB_LINKAT@
+GL_GNULIB_LISTEN = @GL_GNULIB_LISTEN@
+GL_GNULIB_LOCALTIME = @GL_GNULIB_LOCALTIME@
+GL_GNULIB_LSEEK = @GL_GNULIB_LSEEK@
+GL_GNULIB_LSTAT = @GL_GNULIB_LSTAT@
+GL_GNULIB_MALLOC_POSIX = @GL_GNULIB_MALLOC_POSIX@
+GL_GNULIB_MBRLEN = @GL_GNULIB_MBRLEN@
+GL_GNULIB_MBRTOWC = @GL_GNULIB_MBRTOWC@
+GL_GNULIB_MBSCASECMP = @GL_GNULIB_MBSCASECMP@
+GL_GNULIB_MBSCASESTR = @GL_GNULIB_MBSCASESTR@
+GL_GNULIB_MBSCHR = @GL_GNULIB_MBSCHR@
+GL_GNULIB_MBSCSPN = @GL_GNULIB_MBSCSPN@
+GL_GNULIB_MBSINIT = @GL_GNULIB_MBSINIT@
+GL_GNULIB_MBSLEN = @GL_GNULIB_MBSLEN@
+GL_GNULIB_MBSNCASECMP = @GL_GNULIB_MBSNCASECMP@
+GL_GNULIB_MBSNLEN = @GL_GNULIB_MBSNLEN@
+GL_GNULIB_MBSNRTOWCS = @GL_GNULIB_MBSNRTOWCS@
+GL_GNULIB_MBSPBRK = @GL_GNULIB_MBSPBRK@
+GL_GNULIB_MBSPCASECMP = @GL_GNULIB_MBSPCASECMP@
+GL_GNULIB_MBSRCHR = @GL_GNULIB_MBSRCHR@
+GL_GNULIB_MBSRTOWCS = @GL_GNULIB_MBSRTOWCS@
+GL_GNULIB_MBSSEP = @GL_GNULIB_MBSSEP@
+GL_GNULIB_MBSSPN = @GL_GNULIB_MBSSPN@
+GL_GNULIB_MBSSTR = @GL_GNULIB_MBSSTR@
+GL_GNULIB_MBSTOK_R = @GL_GNULIB_MBSTOK_R@
+GL_GNULIB_MBTOWC = @GL_GNULIB_MBTOWC@
+GL_GNULIB_MDA_ACCESS = @GL_GNULIB_MDA_ACCESS@
+GL_GNULIB_MDA_CHDIR = @GL_GNULIB_MDA_CHDIR@
+GL_GNULIB_MDA_CHMOD = @GL_GNULIB_MDA_CHMOD@
+GL_GNULIB_MDA_CLOSE = @GL_GNULIB_MDA_CLOSE@
+GL_GNULIB_MDA_CREAT = @GL_GNULIB_MDA_CREAT@
+GL_GNULIB_MDA_DUP = @GL_GNULIB_MDA_DUP@
+GL_GNULIB_MDA_DUP2 = @GL_GNULIB_MDA_DUP2@
+GL_GNULIB_MDA_ECVT = @GL_GNULIB_MDA_ECVT@
+GL_GNULIB_MDA_EXECL = @GL_GNULIB_MDA_EXECL@
+GL_GNULIB_MDA_EXECLE = @GL_GNULIB_MDA_EXECLE@
+GL_GNULIB_MDA_EXECLP = @GL_GNULIB_MDA_EXECLP@
+GL_GNULIB_MDA_EXECV = @GL_GNULIB_MDA_EXECV@
+GL_GNULIB_MDA_EXECVE = @GL_GNULIB_MDA_EXECVE@
+GL_GNULIB_MDA_EXECVP = @GL_GNULIB_MDA_EXECVP@
+GL_GNULIB_MDA_EXECVPE = @GL_GNULIB_MDA_EXECVPE@
+GL_GNULIB_MDA_FCLOSEALL = @GL_GNULIB_MDA_FCLOSEALL@
+GL_GNULIB_MDA_FCVT = @GL_GNULIB_MDA_FCVT@
+GL_GNULIB_MDA_FDOPEN = @GL_GNULIB_MDA_FDOPEN@
+GL_GNULIB_MDA_FILENO = @GL_GNULIB_MDA_FILENO@
+GL_GNULIB_MDA_GCVT = @GL_GNULIB_MDA_GCVT@
+GL_GNULIB_MDA_GETCWD = @GL_GNULIB_MDA_GETCWD@
+GL_GNULIB_MDA_GETPID = @GL_GNULIB_MDA_GETPID@
+GL_GNULIB_MDA_GETW = @GL_GNULIB_MDA_GETW@
+GL_GNULIB_MDA_ISATTY = @GL_GNULIB_MDA_ISATTY@
+GL_GNULIB_MDA_LSEEK = @GL_GNULIB_MDA_LSEEK@
+GL_GNULIB_MDA_MEMCCPY = @GL_GNULIB_MDA_MEMCCPY@
+GL_GNULIB_MDA_MKDIR = @GL_GNULIB_MDA_MKDIR@
+GL_GNULIB_MDA_MKTEMP = @GL_GNULIB_MDA_MKTEMP@
+GL_GNULIB_MDA_OPEN = @GL_GNULIB_MDA_OPEN@
+GL_GNULIB_MDA_PUTENV = @GL_GNULIB_MDA_PUTENV@
+GL_GNULIB_MDA_PUTW = @GL_GNULIB_MDA_PUTW@
+GL_GNULIB_MDA_READ = @GL_GNULIB_MDA_READ@
+GL_GNULIB_MDA_RMDIR = @GL_GNULIB_MDA_RMDIR@
+GL_GNULIB_MDA_STRDUP = @GL_GNULIB_MDA_STRDUP@
+GL_GNULIB_MDA_SWAB = @GL_GNULIB_MDA_SWAB@
+GL_GNULIB_MDA_TEMPNAM = @GL_GNULIB_MDA_TEMPNAM@
+GL_GNULIB_MDA_TZSET = @GL_GNULIB_MDA_TZSET@
+GL_GNULIB_MDA_UMASK = @GL_GNULIB_MDA_UMASK@
+GL_GNULIB_MDA_UNLINK = @GL_GNULIB_MDA_UNLINK@
+GL_GNULIB_MDA_WCSDUP = @GL_GNULIB_MDA_WCSDUP@
+GL_GNULIB_MDA_WRITE = @GL_GNULIB_MDA_WRITE@
+GL_GNULIB_MEMCHR = @GL_GNULIB_MEMCHR@
+GL_GNULIB_MEMMEM = @GL_GNULIB_MEMMEM@
+GL_GNULIB_MEMPCPY = @GL_GNULIB_MEMPCPY@
+GL_GNULIB_MEMRCHR = @GL_GNULIB_MEMRCHR@
+GL_GNULIB_MKDIR = @GL_GNULIB_MKDIR@
+GL_GNULIB_MKDIRAT = @GL_GNULIB_MKDIRAT@
+GL_GNULIB_MKDTEMP = @GL_GNULIB_MKDTEMP@
+GL_GNULIB_MKFIFO = @GL_GNULIB_MKFIFO@
+GL_GNULIB_MKFIFOAT = @GL_GNULIB_MKFIFOAT@
+GL_GNULIB_MKNOD = @GL_GNULIB_MKNOD@
+GL_GNULIB_MKNODAT = @GL_GNULIB_MKNODAT@
+GL_GNULIB_MKOSTEMP = @GL_GNULIB_MKOSTEMP@
+GL_GNULIB_MKOSTEMPS = @GL_GNULIB_MKOSTEMPS@
+GL_GNULIB_MKSTEMP = @GL_GNULIB_MKSTEMP@
+GL_GNULIB_MKSTEMPS = @GL_GNULIB_MKSTEMPS@
+GL_GNULIB_MKTIME = @GL_GNULIB_MKTIME@
+GL_GNULIB_NANOSLEEP = @GL_GNULIB_NANOSLEEP@
+GL_GNULIB_NONBLOCKING = @GL_GNULIB_NONBLOCKING@
+GL_GNULIB_OBSTACK_PRINTF = @GL_GNULIB_OBSTACK_PRINTF@
+GL_GNULIB_OBSTACK_PRINTF_POSIX = @GL_GNULIB_OBSTACK_PRINTF_POSIX@
+GL_GNULIB_OPEN = @GL_GNULIB_OPEN@
+GL_GNULIB_OPENAT = @GL_GNULIB_OPENAT@
+GL_GNULIB_OVERRIDES_STRUCT_STAT = @GL_GNULIB_OVERRIDES_STRUCT_STAT@
+GL_GNULIB_PCLOSE = @GL_GNULIB_PCLOSE@
+GL_GNULIB_PERROR = @GL_GNULIB_PERROR@
+GL_GNULIB_PIPE = @GL_GNULIB_PIPE@
+GL_GNULIB_PIPE2 = @GL_GNULIB_PIPE2@
+GL_GNULIB_POPEN = @GL_GNULIB_POPEN@
+GL_GNULIB_POSIX_MEMALIGN = @GL_GNULIB_POSIX_MEMALIGN@
+GL_GNULIB_POSIX_OPENPT = @GL_GNULIB_POSIX_OPENPT@
+GL_GNULIB_PREAD = @GL_GNULIB_PREAD@
+GL_GNULIB_PRINTF = @GL_GNULIB_PRINTF@
+GL_GNULIB_PRINTF_POSIX = @GL_GNULIB_PRINTF_POSIX@
+GL_GNULIB_PTSNAME = @GL_GNULIB_PTSNAME@
+GL_GNULIB_PTSNAME_R = @GL_GNULIB_PTSNAME_R@
+GL_GNULIB_PUTC = @GL_GNULIB_PUTC@
+GL_GNULIB_PUTCHAR = @GL_GNULIB_PUTCHAR@
+GL_GNULIB_PUTENV = @GL_GNULIB_PUTENV@
+GL_GNULIB_PUTS = @GL_GNULIB_PUTS@
+GL_GNULIB_PWRITE = @GL_GNULIB_PWRITE@
+GL_GNULIB_QSORT_R = @GL_GNULIB_QSORT_R@
+GL_GNULIB_RANDOM = @GL_GNULIB_RANDOM@
+GL_GNULIB_RANDOM_R = @GL_GNULIB_RANDOM_R@
+GL_GNULIB_RAWMEMCHR = @GL_GNULIB_RAWMEMCHR@
+GL_GNULIB_READ = @GL_GNULIB_READ@
+GL_GNULIB_READLINK = @GL_GNULIB_READLINK@
+GL_GNULIB_READLINKAT = @GL_GNULIB_READLINKAT@
+GL_GNULIB_REALLOCARRAY = @GL_GNULIB_REALLOCARRAY@
+GL_GNULIB_REALLOC_POSIX = @GL_GNULIB_REALLOC_POSIX@
+GL_GNULIB_REALPATH = @GL_GNULIB_REALPATH@
+GL_GNULIB_RECV = @GL_GNULIB_RECV@
+GL_GNULIB_RECVFROM = @GL_GNULIB_RECVFROM@
+GL_GNULIB_REMOVE = @GL_GNULIB_REMOVE@
+GL_GNULIB_RENAME = @GL_GNULIB_RENAME@
+GL_GNULIB_RENAMEAT = @GL_GNULIB_RENAMEAT@
+GL_GNULIB_RMDIR = @GL_GNULIB_RMDIR@
+GL_GNULIB_RPMATCH = @GL_GNULIB_RPMATCH@
+GL_GNULIB_SCANF = @GL_GNULIB_SCANF@
+GL_GNULIB_SECURE_GETENV = @GL_GNULIB_SECURE_GETENV@
+GL_GNULIB_SEND = @GL_GNULIB_SEND@
+GL_GNULIB_SENDTO = @GL_GNULIB_SENDTO@
+GL_GNULIB_SETENV = @GL_GNULIB_SETENV@
+GL_GNULIB_SETHOSTNAME = @GL_GNULIB_SETHOSTNAME@
+GL_GNULIB_SETSOCKOPT = @GL_GNULIB_SETSOCKOPT@
+GL_GNULIB_SHUTDOWN = @GL_GNULIB_SHUTDOWN@
+GL_GNULIB_SIGABBREV_NP = @GL_GNULIB_SIGABBREV_NP@
+GL_GNULIB_SIGDESCR_NP = @GL_GNULIB_SIGDESCR_NP@
+GL_GNULIB_SLEEP = @GL_GNULIB_SLEEP@
+GL_GNULIB_SNPRINTF = @GL_GNULIB_SNPRINTF@
+GL_GNULIB_SOCKET = @GL_GNULIB_SOCKET@
+GL_GNULIB_SPRINTF_POSIX = @GL_GNULIB_SPRINTF_POSIX@
+GL_GNULIB_STAT = @GL_GNULIB_STAT@
+GL_GNULIB_STDIO_H_NONBLOCKING = @GL_GNULIB_STDIO_H_NONBLOCKING@
+GL_GNULIB_STDIO_H_SIGPIPE = @GL_GNULIB_STDIO_H_SIGPIPE@
+GL_GNULIB_STPCPY = @GL_GNULIB_STPCPY@
+GL_GNULIB_STPNCPY = @GL_GNULIB_STPNCPY@
+GL_GNULIB_STRCASESTR = @GL_GNULIB_STRCASESTR@
+GL_GNULIB_STRCHRNUL = @GL_GNULIB_STRCHRNUL@
+GL_GNULIB_STRDUP = @GL_GNULIB_STRDUP@
+GL_GNULIB_STRERROR = @GL_GNULIB_STRERROR@
+GL_GNULIB_STRERRORNAME_NP = @GL_GNULIB_STRERRORNAME_NP@
+GL_GNULIB_STRERROR_R = @GL_GNULIB_STRERROR_R@
+GL_GNULIB_STRFTIME = @GL_GNULIB_STRFTIME@
+GL_GNULIB_STRNCAT = @GL_GNULIB_STRNCAT@
+GL_GNULIB_STRNDUP = @GL_GNULIB_STRNDUP@
+GL_GNULIB_STRNLEN = @GL_GNULIB_STRNLEN@
+GL_GNULIB_STRPBRK = @GL_GNULIB_STRPBRK@
+GL_GNULIB_STRPTIME = @GL_GNULIB_STRPTIME@
+GL_GNULIB_STRSEP = @GL_GNULIB_STRSEP@
+GL_GNULIB_STRSIGNAL = @GL_GNULIB_STRSIGNAL@
+GL_GNULIB_STRSTR = @GL_GNULIB_STRSTR@
+GL_GNULIB_STRTOD = @GL_GNULIB_STRTOD@
+GL_GNULIB_STRTOIMAX = @GL_GNULIB_STRTOIMAX@
+GL_GNULIB_STRTOK_R = @GL_GNULIB_STRTOK_R@
+GL_GNULIB_STRTOL = @GL_GNULIB_STRTOL@
+GL_GNULIB_STRTOLD = @GL_GNULIB_STRTOLD@
+GL_GNULIB_STRTOLL = @GL_GNULIB_STRTOLL@
+GL_GNULIB_STRTOUL = @GL_GNULIB_STRTOUL@
+GL_GNULIB_STRTOULL = @GL_GNULIB_STRTOULL@
+GL_GNULIB_STRTOUMAX = @GL_GNULIB_STRTOUMAX@
+GL_GNULIB_STRVERSCMP = @GL_GNULIB_STRVERSCMP@
+GL_GNULIB_SYMLINK = @GL_GNULIB_SYMLINK@
+GL_GNULIB_SYMLINKAT = @GL_GNULIB_SYMLINKAT@
+GL_GNULIB_SYSTEM_POSIX = @GL_GNULIB_SYSTEM_POSIX@
+GL_GNULIB_TIMEGM = @GL_GNULIB_TIMEGM@
+GL_GNULIB_TIMESPEC_GET = @GL_GNULIB_TIMESPEC_GET@
+GL_GNULIB_TIME_R = @GL_GNULIB_TIME_R@
+GL_GNULIB_TIME_RZ = @GL_GNULIB_TIME_RZ@
+GL_GNULIB_TMPFILE = @GL_GNULIB_TMPFILE@
+GL_GNULIB_TRUNCATE = @GL_GNULIB_TRUNCATE@
+GL_GNULIB_TTYNAME_R = @GL_GNULIB_TTYNAME_R@
+GL_GNULIB_TZSET = @GL_GNULIB_TZSET@
+GL_GNULIB_UNISTD_H_NONBLOCKING = @GL_GNULIB_UNISTD_H_NONBLOCKING@
+GL_GNULIB_UNISTD_H_SIGPIPE = @GL_GNULIB_UNISTD_H_SIGPIPE@
+GL_GNULIB_UNLINK = @GL_GNULIB_UNLINK@
+GL_GNULIB_UNLINKAT = @GL_GNULIB_UNLINKAT@
+GL_GNULIB_UNLOCKPT = @GL_GNULIB_UNLOCKPT@
+GL_GNULIB_UNSETENV = @GL_GNULIB_UNSETENV@
+GL_GNULIB_USLEEP = @GL_GNULIB_USLEEP@
+GL_GNULIB_UTIMENSAT = @GL_GNULIB_UTIMENSAT@
+GL_GNULIB_VASPRINTF = @GL_GNULIB_VASPRINTF@
+GL_GNULIB_VDPRINTF = @GL_GNULIB_VDPRINTF@
+GL_GNULIB_VFPRINTF = @GL_GNULIB_VFPRINTF@
+GL_GNULIB_VFPRINTF_POSIX = @GL_GNULIB_VFPRINTF_POSIX@
+GL_GNULIB_VFSCANF = @GL_GNULIB_VFSCANF@
+GL_GNULIB_VPRINTF = @GL_GNULIB_VPRINTF@
+GL_GNULIB_VPRINTF_POSIX = @GL_GNULIB_VPRINTF_POSIX@
+GL_GNULIB_VSCANF = @GL_GNULIB_VSCANF@
+GL_GNULIB_VSNPRINTF = @GL_GNULIB_VSNPRINTF@
+GL_GNULIB_VSPRINTF_POSIX = @GL_GNULIB_VSPRINTF_POSIX@
+GL_GNULIB_WCPCPY = @GL_GNULIB_WCPCPY@
+GL_GNULIB_WCPNCPY = @GL_GNULIB_WCPNCPY@
+GL_GNULIB_WCRTOMB = @GL_GNULIB_WCRTOMB@
+GL_GNULIB_WCSCASECMP = @GL_GNULIB_WCSCASECMP@
+GL_GNULIB_WCSCAT = @GL_GNULIB_WCSCAT@
+GL_GNULIB_WCSCHR = @GL_GNULIB_WCSCHR@
+GL_GNULIB_WCSCMP = @GL_GNULIB_WCSCMP@
+GL_GNULIB_WCSCOLL = @GL_GNULIB_WCSCOLL@
+GL_GNULIB_WCSCPY = @GL_GNULIB_WCSCPY@
+GL_GNULIB_WCSCSPN = @GL_GNULIB_WCSCSPN@
+GL_GNULIB_WCSDUP = @GL_GNULIB_WCSDUP@
+GL_GNULIB_WCSFTIME = @GL_GNULIB_WCSFTIME@
+GL_GNULIB_WCSLEN = @GL_GNULIB_WCSLEN@
+GL_GNULIB_WCSNCASECMP = @GL_GNULIB_WCSNCASECMP@
+GL_GNULIB_WCSNCAT = @GL_GNULIB_WCSNCAT@
+GL_GNULIB_WCSNCMP = @GL_GNULIB_WCSNCMP@
+GL_GNULIB_WCSNCPY = @GL_GNULIB_WCSNCPY@
+GL_GNULIB_WCSNLEN = @GL_GNULIB_WCSNLEN@
+GL_GNULIB_WCSNRTOMBS = @GL_GNULIB_WCSNRTOMBS@
+GL_GNULIB_WCSPBRK = @GL_GNULIB_WCSPBRK@
+GL_GNULIB_WCSRCHR = @GL_GNULIB_WCSRCHR@
+GL_GNULIB_WCSRTOMBS = @GL_GNULIB_WCSRTOMBS@
+GL_GNULIB_WCSSPN = @GL_GNULIB_WCSSPN@
+GL_GNULIB_WCSSTR = @GL_GNULIB_WCSSTR@
+GL_GNULIB_WCSTOK = @GL_GNULIB_WCSTOK@
+GL_GNULIB_WCSWIDTH = @GL_GNULIB_WCSWIDTH@
+GL_GNULIB_WCSXFRM = @GL_GNULIB_WCSXFRM@
+GL_GNULIB_WCTOB = @GL_GNULIB_WCTOB@
+GL_GNULIB_WCTOMB = @GL_GNULIB_WCTOMB@
+GL_GNULIB_WCWIDTH = @GL_GNULIB_WCWIDTH@
+GL_GNULIB_WMEMCHR = @GL_GNULIB_WMEMCHR@
+GL_GNULIB_WMEMCMP = @GL_GNULIB_WMEMCMP@
+GL_GNULIB_WMEMCPY = @GL_GNULIB_WMEMCPY@
+GL_GNULIB_WMEMMOVE = @GL_GNULIB_WMEMMOVE@
+GL_GNULIB_WMEMPCPY = @GL_GNULIB_WMEMPCPY@
+GL_GNULIB_WMEMSET = @GL_GNULIB_WMEMSET@
+GL_GNULIB_WRITE = @GL_GNULIB_WRITE@
+GL_GNULIB__EXIT = @GL_GNULIB__EXIT@
+GMP_CFLAGS = @GMP_CFLAGS@
+GMP_LIBS = @GMP_LIBS@
+GMSGFMT = @GMSGFMT@
+GMSGFMT_015 = @GMSGFMT_015@
+GNULIBHEADERS_OVERRIDE_WINT_T = @GNULIBHEADERS_OVERRIDE_WINT_T@
+GNULIB_GETTIMEOFDAY = @GNULIB_GETTIMEOFDAY@
+GNUTLS_LIBS_PRIVATE = @GNUTLS_LIBS_PRIVATE@
+GNUTLS_REQUIRES_PRIVATE = @GNUTLS_REQUIRES_PRIVATE@
+GPERF = @GPERF@
+GREP = @GREP@
+GTKDOC_CHECK = @GTKDOC_CHECK@
+GTKDOC_CHECK_PATH = @GTKDOC_CHECK_PATH@
+GTKDOC_DEPS_CFLAGS = @GTKDOC_DEPS_CFLAGS@
+GTKDOC_DEPS_LIBS = @GTKDOC_DEPS_LIBS@
+GTKDOC_MKPDF = @GTKDOC_MKPDF@
+GTKDOC_REBASE = @GTKDOC_REBASE@
+GUILD = @GUILD@
+GUILE = @GUILE@
+GUILE_CFLAGS = @GUILE_CFLAGS@
+GUILE_CONFIG = @GUILE_CONFIG@
+GUILE_EFFECTIVE_VERSION = @GUILE_EFFECTIVE_VERSION@
+GUILE_EXTENSION = @GUILE_EXTENSION@
+GUILE_LDFLAGS = @GUILE_LDFLAGS@
+GUILE_LIBS = @GUILE_LIBS@
+GUILE_LTLIBS = @GUILE_LTLIBS@
+GUILE_SITE = @GUILE_SITE@
+GUILE_SITE_CCACHE = @GUILE_SITE_CCACHE@
+GUILE_TOOLS = @GUILE_TOOLS@
+HAVE_ACCEPT4 = @HAVE_ACCEPT4@
+HAVE_ALIGNED_ALLOC = @HAVE_ALIGNED_ALLOC@
+HAVE_ALLOCA_H = @HAVE_ALLOCA_H@
+HAVE_ARPA_INET_H = @HAVE_ARPA_INET_H@
+HAVE_ATOLL = @HAVE_ATOLL@
+HAVE_BTOWC = @HAVE_BTOWC@
+HAVE_C99_STDINT_H = @HAVE_C99_STDINT_H@
+HAVE_CANONICALIZE_FILE_NAME = @HAVE_CANONICALIZE_FILE_NAME@
+HAVE_CHOWN = @HAVE_CHOWN@
+HAVE_COPY_FILE_RANGE = @HAVE_COPY_FILE_RANGE@
+HAVE_CRTDEFS_H = @HAVE_CRTDEFS_H@
+HAVE_DECL_ECVT = @HAVE_DECL_ECVT@
+HAVE_DECL_ENVIRON = @HAVE_DECL_ENVIRON@
+HAVE_DECL_EXECVPE = @HAVE_DECL_EXECVPE@
+HAVE_DECL_FCHDIR = @HAVE_DECL_FCHDIR@
+HAVE_DECL_FCLOSEALL = @HAVE_DECL_FCLOSEALL@
+HAVE_DECL_FCVT = @HAVE_DECL_FCVT@
+HAVE_DECL_FDATASYNC = @HAVE_DECL_FDATASYNC@
+HAVE_DECL_FPURGE = @HAVE_DECL_FPURGE@
+HAVE_DECL_FREEADDRINFO = @HAVE_DECL_FREEADDRINFO@
+HAVE_DECL_FSEEKO = @HAVE_DECL_FSEEKO@
+HAVE_DECL_FTELLO = @HAVE_DECL_FTELLO@
+HAVE_DECL_GAI_STRERROR = @HAVE_DECL_GAI_STRERROR@
+HAVE_DECL_GCVT = @HAVE_DECL_GCVT@
+HAVE_DECL_GETADDRINFO = @HAVE_DECL_GETADDRINFO@
+HAVE_DECL_GETDELIM = @HAVE_DECL_GETDELIM@
+HAVE_DECL_GETDOMAINNAME = @HAVE_DECL_GETDOMAINNAME@
+HAVE_DECL_GETLINE = @HAVE_DECL_GETLINE@
+HAVE_DECL_GETLOADAVG = @HAVE_DECL_GETLOADAVG@
+HAVE_DECL_GETLOGIN = @HAVE_DECL_GETLOGIN@
+HAVE_DECL_GETLOGIN_R = @HAVE_DECL_GETLOGIN_R@
+HAVE_DECL_GETNAMEINFO = @HAVE_DECL_GETNAMEINFO@
+HAVE_DECL_GETPAGESIZE = @HAVE_DECL_GETPAGESIZE@
+HAVE_DECL_GETUSERSHELL = @HAVE_DECL_GETUSERSHELL@
+HAVE_DECL_IMAXABS = @HAVE_DECL_IMAXABS@
+HAVE_DECL_IMAXDIV = @HAVE_DECL_IMAXDIV@
+HAVE_DECL_INET_NTOP = @HAVE_DECL_INET_NTOP@
+HAVE_DECL_INET_PTON = @HAVE_DECL_INET_PTON@
+HAVE_DECL_INITSTATE = @HAVE_DECL_INITSTATE@
+HAVE_DECL_LOCALTIME_R = @HAVE_DECL_LOCALTIME_R@
+HAVE_DECL_MEMMEM = @HAVE_DECL_MEMMEM@
+HAVE_DECL_MEMRCHR = @HAVE_DECL_MEMRCHR@
+HAVE_DECL_OBSTACK_PRINTF = @HAVE_DECL_OBSTACK_PRINTF@
+HAVE_DECL_SETENV = @HAVE_DECL_SETENV@
+HAVE_DECL_SETHOSTNAME = @HAVE_DECL_SETHOSTNAME@
+HAVE_DECL_SETSTATE = @HAVE_DECL_SETSTATE@
+HAVE_DECL_SNPRINTF = @HAVE_DECL_SNPRINTF@
+HAVE_DECL_STRDUP = @HAVE_DECL_STRDUP@
+HAVE_DECL_STRERROR_R = @HAVE_DECL_STRERROR_R@
+HAVE_DECL_STRNCASECMP = @HAVE_DECL_STRNCASECMP@
+HAVE_DECL_STRNDUP = @HAVE_DECL_STRNDUP@
+HAVE_DECL_STRNLEN = @HAVE_DECL_STRNLEN@
+HAVE_DECL_STRSIGNAL = @HAVE_DECL_STRSIGNAL@
+HAVE_DECL_STRTOIMAX = @HAVE_DECL_STRTOIMAX@
+HAVE_DECL_STRTOK_R = @HAVE_DECL_STRTOK_R@
+HAVE_DECL_STRTOUMAX = @HAVE_DECL_STRTOUMAX@
+HAVE_DECL_TRUNCATE = @HAVE_DECL_TRUNCATE@
+HAVE_DECL_TTYNAME_R = @HAVE_DECL_TTYNAME_R@
+HAVE_DECL_UNSETENV = @HAVE_DECL_UNSETENV@
+HAVE_DECL_VSNPRINTF = @HAVE_DECL_VSNPRINTF@
+HAVE_DECL_WCSDUP = @HAVE_DECL_WCSDUP@
+HAVE_DECL_WCTOB = @HAVE_DECL_WCTOB@
+HAVE_DECL_WCWIDTH = @HAVE_DECL_WCWIDTH@
+HAVE_DPRINTF = @HAVE_DPRINTF@
+HAVE_DUP3 = @HAVE_DUP3@
+HAVE_DUPLOCALE = @HAVE_DUPLOCALE@
+HAVE_EUIDACCESS = @HAVE_EUIDACCESS@
+HAVE_EXECVPE = @HAVE_EXECVPE@
+HAVE_EXPLICIT_BZERO = @HAVE_EXPLICIT_BZERO@
+HAVE_FACCESSAT = @HAVE_FACCESSAT@
+HAVE_FCHDIR = @HAVE_FCHDIR@
+HAVE_FCHMODAT = @HAVE_FCHMODAT@
+HAVE_FCHOWNAT = @HAVE_FCHOWNAT@
+HAVE_FCNTL = @HAVE_FCNTL@
+HAVE_FDATASYNC = @HAVE_FDATASYNC@
+HAVE_FEATURES_H = @HAVE_FEATURES_H@
+HAVE_FFS = @HAVE_FFS@
+HAVE_FFSL = @HAVE_FFSL@
+HAVE_FFSLL = @HAVE_FFSLL@
+HAVE_FREELOCALE = @HAVE_FREELOCALE@
+HAVE_FSEEKO = @HAVE_FSEEKO@
+HAVE_FSTATAT = @HAVE_FSTATAT@
+HAVE_FSYNC = @HAVE_FSYNC@
+HAVE_FTELLO = @HAVE_FTELLO@
+HAVE_FTRUNCATE = @HAVE_FTRUNCATE@
+HAVE_FUTIMENS = @HAVE_FUTIMENS@
+HAVE_GETDTABLESIZE = @HAVE_GETDTABLESIZE@
+HAVE_GETENTROPY = @HAVE_GETENTROPY@
+HAVE_GETGROUPS = @HAVE_GETGROUPS@
+HAVE_GETHOSTNAME = @HAVE_GETHOSTNAME@
+HAVE_GETLOGIN = @HAVE_GETLOGIN@
+HAVE_GETPAGESIZE = @HAVE_GETPAGESIZE@
+HAVE_GETPASS = @HAVE_GETPASS@
+HAVE_GETSUBOPT = @HAVE_GETSUBOPT@
+HAVE_GETTIMEOFDAY = @HAVE_GETTIMEOFDAY@
+HAVE_GETUMASK = @HAVE_GETUMASK@
+HAVE_GRANTPT = @HAVE_GRANTPT@
+HAVE_GROUP_MEMBER = @HAVE_GROUP_MEMBER@
+HAVE_IMAXDIV_T = @HAVE_IMAXDIV_T@
+HAVE_INITSTATE = @HAVE_INITSTATE@
+HAVE_INTTYPES_H = @HAVE_INTTYPES_H@
+HAVE_ISBLANK = @HAVE_ISBLANK@
+HAVE_LANGINFO_ALTMON = @HAVE_LANGINFO_ALTMON@
+HAVE_LANGINFO_CODESET = @HAVE_LANGINFO_CODESET@
+HAVE_LANGINFO_ERA = @HAVE_LANGINFO_ERA@
+HAVE_LANGINFO_H = @HAVE_LANGINFO_H@
+HAVE_LANGINFO_T_FMT_AMPM = @HAVE_LANGINFO_T_FMT_AMPM@
+HAVE_LANGINFO_YESEXPR = @HAVE_LANGINFO_YESEXPR@
+HAVE_LCHMOD = @HAVE_LCHMOD@
+HAVE_LCHOWN = @HAVE_LCHOWN@
+HAVE_LIBCRYPTO = @HAVE_LIBCRYPTO@
+HAVE_LIBDL = @HAVE_LIBDL@
+HAVE_LIBEV = @HAVE_LIBEV@
+HAVE_LIBPTHREAD = @HAVE_LIBPTHREAD@
+HAVE_LIBRT = @HAVE_LIBRT@
+HAVE_LIBSECCOMP = @HAVE_LIBSECCOMP@
+HAVE_LIBZ = @HAVE_LIBZ@
+HAVE_LINK = @HAVE_LINK@
+HAVE_LINKAT = @HAVE_LINKAT@
+HAVE_LSTAT = @HAVE_LSTAT@
+HAVE_MAX_ALIGN_T = @HAVE_MAX_ALIGN_T@
+HAVE_MBRLEN = @HAVE_MBRLEN@
+HAVE_MBRTOWC = @HAVE_MBRTOWC@
+HAVE_MBSINIT = @HAVE_MBSINIT@
+HAVE_MBSLEN = @HAVE_MBSLEN@
+HAVE_MBSNRTOWCS = @HAVE_MBSNRTOWCS@
+HAVE_MBSRTOWCS = @HAVE_MBSRTOWCS@
+HAVE_MBTOWC = @HAVE_MBTOWC@
+HAVE_MEMPCPY = @HAVE_MEMPCPY@
+HAVE_MKDIRAT = @HAVE_MKDIRAT@
+HAVE_MKDTEMP = @HAVE_MKDTEMP@
+HAVE_MKFIFO = @HAVE_MKFIFO@
+HAVE_MKFIFOAT = @HAVE_MKFIFOAT@
+HAVE_MKNOD = @HAVE_MKNOD@
+HAVE_MKNODAT = @HAVE_MKNODAT@
+HAVE_MKOSTEMP = @HAVE_MKOSTEMP@
+HAVE_MKOSTEMPS = @HAVE_MKOSTEMPS@
+HAVE_MKSTEMP = @HAVE_MKSTEMP@
+HAVE_MKSTEMPS = @HAVE_MKSTEMPS@
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+HAVE_NETINET_IN_H = @HAVE_NETINET_IN_H@
+HAVE_NEWLOCALE = @HAVE_NEWLOCALE@
+HAVE_NL_LANGINFO = @HAVE_NL_LANGINFO@
+HAVE_OPENAT = @HAVE_OPENAT@
+HAVE_OS_H = @HAVE_OS_H@
+HAVE_PCLOSE = @HAVE_PCLOSE@
+HAVE_PIPE = @HAVE_PIPE@
+HAVE_PIPE2 = @HAVE_PIPE2@
+HAVE_POPEN = @HAVE_POPEN@
+HAVE_POSIX_MEMALIGN = @HAVE_POSIX_MEMALIGN@
+HAVE_POSIX_OPENPT = @HAVE_POSIX_OPENPT@
+HAVE_POSIX_SIGNALBLOCKING = @HAVE_POSIX_SIGNALBLOCKING@
+HAVE_PREAD = @HAVE_PREAD@
+HAVE_PSELECT = @HAVE_PSELECT@
+HAVE_PTHREAD_ATTR_DESTROY = @HAVE_PTHREAD_ATTR_DESTROY@
+HAVE_PTHREAD_ATTR_GETDETACHSTATE = @HAVE_PTHREAD_ATTR_GETDETACHSTATE@
+HAVE_PTHREAD_ATTR_INIT = @HAVE_PTHREAD_ATTR_INIT@
+HAVE_PTHREAD_ATTR_SETDETACHSTATE = @HAVE_PTHREAD_ATTR_SETDETACHSTATE@
+HAVE_PTHREAD_CONDATTR_DESTROY = @HAVE_PTHREAD_CONDATTR_DESTROY@
+HAVE_PTHREAD_CONDATTR_INIT = @HAVE_PTHREAD_CONDATTR_INIT@
+HAVE_PTHREAD_COND_BROADCAST = @HAVE_PTHREAD_COND_BROADCAST@
+HAVE_PTHREAD_COND_DESTROY = @HAVE_PTHREAD_COND_DESTROY@
+HAVE_PTHREAD_COND_INIT = @HAVE_PTHREAD_COND_INIT@
+HAVE_PTHREAD_COND_SIGNAL = @HAVE_PTHREAD_COND_SIGNAL@
+HAVE_PTHREAD_COND_TIMEDWAIT = @HAVE_PTHREAD_COND_TIMEDWAIT@
+HAVE_PTHREAD_COND_WAIT = @HAVE_PTHREAD_COND_WAIT@
+HAVE_PTHREAD_CREATE = @HAVE_PTHREAD_CREATE@
+HAVE_PTHREAD_CREATE_DETACHED = @HAVE_PTHREAD_CREATE_DETACHED@
+HAVE_PTHREAD_DETACH = @HAVE_PTHREAD_DETACH@
+HAVE_PTHREAD_EQUAL = @HAVE_PTHREAD_EQUAL@
+HAVE_PTHREAD_EXIT = @HAVE_PTHREAD_EXIT@
+HAVE_PTHREAD_GETSPECIFIC = @HAVE_PTHREAD_GETSPECIFIC@
+HAVE_PTHREAD_H = @HAVE_PTHREAD_H@
+HAVE_PTHREAD_JOIN = @HAVE_PTHREAD_JOIN@
+HAVE_PTHREAD_KEY_CREATE = @HAVE_PTHREAD_KEY_CREATE@
+HAVE_PTHREAD_KEY_DELETE = @HAVE_PTHREAD_KEY_DELETE@
+HAVE_PTHREAD_MUTEXATTR_DESTROY = @HAVE_PTHREAD_MUTEXATTR_DESTROY@
+HAVE_PTHREAD_MUTEXATTR_GETROBUST = @HAVE_PTHREAD_MUTEXATTR_GETROBUST@
+HAVE_PTHREAD_MUTEXATTR_GETTYPE = @HAVE_PTHREAD_MUTEXATTR_GETTYPE@
+HAVE_PTHREAD_MUTEXATTR_INIT = @HAVE_PTHREAD_MUTEXATTR_INIT@
+HAVE_PTHREAD_MUTEXATTR_SETROBUST = @HAVE_PTHREAD_MUTEXATTR_SETROBUST@
+HAVE_PTHREAD_MUTEXATTR_SETTYPE = @HAVE_PTHREAD_MUTEXATTR_SETTYPE@
+HAVE_PTHREAD_MUTEX_DESTROY = @HAVE_PTHREAD_MUTEX_DESTROY@
+HAVE_PTHREAD_MUTEX_INIT = @HAVE_PTHREAD_MUTEX_INIT@
+HAVE_PTHREAD_MUTEX_LOCK = @HAVE_PTHREAD_MUTEX_LOCK@
+HAVE_PTHREAD_MUTEX_RECURSIVE = @HAVE_PTHREAD_MUTEX_RECURSIVE@
+HAVE_PTHREAD_MUTEX_ROBUST = @HAVE_PTHREAD_MUTEX_ROBUST@
+HAVE_PTHREAD_MUTEX_TIMEDLOCK = @HAVE_PTHREAD_MUTEX_TIMEDLOCK@
+HAVE_PTHREAD_MUTEX_TRYLOCK = @HAVE_PTHREAD_MUTEX_TRYLOCK@
+HAVE_PTHREAD_MUTEX_UNLOCK = @HAVE_PTHREAD_MUTEX_UNLOCK@
+HAVE_PTHREAD_ONCE = @HAVE_PTHREAD_ONCE@
+HAVE_PTHREAD_PROCESS_SHARED = @HAVE_PTHREAD_PROCESS_SHARED@
+HAVE_PTHREAD_RWLOCKATTR_DESTROY = @HAVE_PTHREAD_RWLOCKATTR_DESTROY@
+HAVE_PTHREAD_RWLOCKATTR_INIT = @HAVE_PTHREAD_RWLOCKATTR_INIT@
+HAVE_PTHREAD_RWLOCK_DESTROY = @HAVE_PTHREAD_RWLOCK_DESTROY@
+HAVE_PTHREAD_RWLOCK_INIT = @HAVE_PTHREAD_RWLOCK_INIT@
+HAVE_PTHREAD_RWLOCK_RDLOCK = @HAVE_PTHREAD_RWLOCK_RDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK = @HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+HAVE_PTHREAD_RWLOCK_TRYRDLOCK = @HAVE_PTHREAD_RWLOCK_TRYRDLOCK@
+HAVE_PTHREAD_RWLOCK_TRYWRLOCK = @HAVE_PTHREAD_RWLOCK_TRYWRLOCK@
+HAVE_PTHREAD_RWLOCK_UNLOCK = @HAVE_PTHREAD_RWLOCK_UNLOCK@
+HAVE_PTHREAD_RWLOCK_WRLOCK = @HAVE_PTHREAD_RWLOCK_WRLOCK@
+HAVE_PTHREAD_SELF = @HAVE_PTHREAD_SELF@
+HAVE_PTHREAD_SETSPECIFIC = @HAVE_PTHREAD_SETSPECIFIC@
+HAVE_PTHREAD_SIGMASK = @HAVE_PTHREAD_SIGMASK@
+HAVE_PTHREAD_SPINLOCK_T = @HAVE_PTHREAD_SPINLOCK_T@
+HAVE_PTHREAD_SPIN_DESTROY = @HAVE_PTHREAD_SPIN_DESTROY@
+HAVE_PTHREAD_SPIN_INIT = @HAVE_PTHREAD_SPIN_INIT@
+HAVE_PTHREAD_SPIN_LOCK = @HAVE_PTHREAD_SPIN_LOCK@
+HAVE_PTHREAD_SPIN_TRYLOCK = @HAVE_PTHREAD_SPIN_TRYLOCK@
+HAVE_PTHREAD_SPIN_UNLOCK = @HAVE_PTHREAD_SPIN_UNLOCK@
+HAVE_PTHREAD_T = @HAVE_PTHREAD_T@
+HAVE_PTSNAME = @HAVE_PTSNAME@
+HAVE_PTSNAME_R = @HAVE_PTSNAME_R@
+HAVE_PWRITE = @HAVE_PWRITE@
+HAVE_QSORT_R = @HAVE_QSORT_R@
+HAVE_RAISE = @HAVE_RAISE@
+HAVE_RANDOM = @HAVE_RANDOM@
+HAVE_RANDOM_H = @HAVE_RANDOM_H@
+HAVE_RANDOM_R = @HAVE_RANDOM_R@
+HAVE_RAWMEMCHR = @HAVE_RAWMEMCHR@
+HAVE_READLINK = @HAVE_READLINK@
+HAVE_READLINKAT = @HAVE_READLINKAT@
+HAVE_REALLOCARRAY = @HAVE_REALLOCARRAY@
+HAVE_REALPATH = @HAVE_REALPATH@
+HAVE_RENAMEAT = @HAVE_RENAMEAT@
+HAVE_RPMATCH = @HAVE_RPMATCH@
+HAVE_SA_FAMILY_T = @HAVE_SA_FAMILY_T@
+HAVE_SCHED_H = @HAVE_SCHED_H@
+HAVE_SCHED_YIELD = @HAVE_SCHED_YIELD@
+HAVE_SECURE_GETENV = @HAVE_SECURE_GETENV@
+HAVE_SETENV = @HAVE_SETENV@
+HAVE_SETHOSTNAME = @HAVE_SETHOSTNAME@
+HAVE_SETSTATE = @HAVE_SETSTATE@
+HAVE_SIGABBREV_NP = @HAVE_SIGABBREV_NP@
+HAVE_SIGACTION = @HAVE_SIGACTION@
+HAVE_SIGDESCR_NP = @HAVE_SIGDESCR_NP@
+HAVE_SIGHANDLER_T = @HAVE_SIGHANDLER_T@
+HAVE_SIGINFO_T = @HAVE_SIGINFO_T@
+HAVE_SIGNED_SIG_ATOMIC_T = @HAVE_SIGNED_SIG_ATOMIC_T@
+HAVE_SIGNED_WCHAR_T = @HAVE_SIGNED_WCHAR_T@
+HAVE_SIGNED_WINT_T = @HAVE_SIGNED_WINT_T@
+HAVE_SIGSET_T = @HAVE_SIGSET_T@
+HAVE_SLEEP = @HAVE_SLEEP@
+HAVE_STDINT_H = @HAVE_STDINT_H@
+HAVE_STPCPY = @HAVE_STPCPY@
+HAVE_STPNCPY = @HAVE_STPNCPY@
+HAVE_STRCASECMP = @HAVE_STRCASECMP@
+HAVE_STRCASESTR = @HAVE_STRCASESTR@
+HAVE_STRCHRNUL = @HAVE_STRCHRNUL@
+HAVE_STRERRORNAME_NP = @HAVE_STRERRORNAME_NP@
+HAVE_STRINGS_H = @HAVE_STRINGS_H@
+HAVE_STRPBRK = @HAVE_STRPBRK@
+HAVE_STRPTIME = @HAVE_STRPTIME@
+HAVE_STRSEP = @HAVE_STRSEP@
+HAVE_STRTOD = @HAVE_STRTOD@
+HAVE_STRTOL = @HAVE_STRTOL@
+HAVE_STRTOLD = @HAVE_STRTOLD@
+HAVE_STRTOLL = @HAVE_STRTOLL@
+HAVE_STRTOUL = @HAVE_STRTOUL@
+HAVE_STRTOULL = @HAVE_STRTOULL@
+HAVE_STRUCT_ADDRINFO = @HAVE_STRUCT_ADDRINFO@
+HAVE_STRUCT_RANDOM_DATA = @HAVE_STRUCT_RANDOM_DATA@
+HAVE_STRUCT_SCHED_PARAM = @HAVE_STRUCT_SCHED_PARAM@
+HAVE_STRUCT_SIGACTION_SA_SIGACTION = @HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+HAVE_STRUCT_SOCKADDR_STORAGE = @HAVE_STRUCT_SOCKADDR_STORAGE@
+HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = @HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
+HAVE_STRUCT_TIMEVAL = @HAVE_STRUCT_TIMEVAL@
+HAVE_STRVERSCMP = @HAVE_STRVERSCMP@
+HAVE_SYMLINK = @HAVE_SYMLINK@
+HAVE_SYMLINKAT = @HAVE_SYMLINKAT@
+HAVE_SYS_BITYPES_H = @HAVE_SYS_BITYPES_H@
+HAVE_SYS_CDEFS_H = @HAVE_SYS_CDEFS_H@
+HAVE_SYS_INTTYPES_H = @HAVE_SYS_INTTYPES_H@
+HAVE_SYS_IOCTL_H = @HAVE_SYS_IOCTL_H@
+HAVE_SYS_LOADAVG_H = @HAVE_SYS_LOADAVG_H@
+HAVE_SYS_PARAM_H = @HAVE_SYS_PARAM_H@
+HAVE_SYS_SELECT_H = @HAVE_SYS_SELECT_H@
+HAVE_SYS_SOCKET_H = @HAVE_SYS_SOCKET_H@
+HAVE_SYS_TIME_H = @HAVE_SYS_TIME_H@
+HAVE_SYS_TYPES_H = @HAVE_SYS_TYPES_H@
+HAVE_SYS_UIO_H = @HAVE_SYS_UIO_H@
+HAVE_TIMEGM = @HAVE_TIMEGM@
+HAVE_TIMESPEC_GET = @HAVE_TIMESPEC_GET@
+HAVE_TIMEZONE_T = @HAVE_TIMEZONE_T@
+HAVE_TYPE_VOLATILE_SIG_ATOMIC_T = @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+HAVE_UNISTD_H = @HAVE_UNISTD_H@
+HAVE_UNLINKAT = @HAVE_UNLINKAT@
+HAVE_UNLOCKPT = @HAVE_UNLOCKPT@
+HAVE_USLEEP = @HAVE_USLEEP@
+HAVE_UTIMENSAT = @HAVE_UTIMENSAT@
+HAVE_VASPRINTF = @HAVE_VASPRINTF@
+HAVE_VDPRINTF = @HAVE_VDPRINTF@
+HAVE_VISIBILITY = @HAVE_VISIBILITY@
+HAVE_WCHAR_H = @HAVE_WCHAR_H@
+HAVE_WCHAR_T = @HAVE_WCHAR_T@
+HAVE_WCPCPY = @HAVE_WCPCPY@
+HAVE_WCPNCPY = @HAVE_WCPNCPY@
+HAVE_WCRTOMB = @HAVE_WCRTOMB@
+HAVE_WCSCASECMP = @HAVE_WCSCASECMP@
+HAVE_WCSCAT = @HAVE_WCSCAT@
+HAVE_WCSCHR = @HAVE_WCSCHR@
+HAVE_WCSCMP = @HAVE_WCSCMP@
+HAVE_WCSCOLL = @HAVE_WCSCOLL@
+HAVE_WCSCPY = @HAVE_WCSCPY@
+HAVE_WCSCSPN = @HAVE_WCSCSPN@
+HAVE_WCSDUP = @HAVE_WCSDUP@
+HAVE_WCSFTIME = @HAVE_WCSFTIME@
+HAVE_WCSLEN = @HAVE_WCSLEN@
+HAVE_WCSNCASECMP = @HAVE_WCSNCASECMP@
+HAVE_WCSNCAT = @HAVE_WCSNCAT@
+HAVE_WCSNCMP = @HAVE_WCSNCMP@
+HAVE_WCSNCPY = @HAVE_WCSNCPY@
+HAVE_WCSNLEN = @HAVE_WCSNLEN@
+HAVE_WCSNRTOMBS = @HAVE_WCSNRTOMBS@
+HAVE_WCSPBRK = @HAVE_WCSPBRK@
+HAVE_WCSRCHR = @HAVE_WCSRCHR@
+HAVE_WCSRTOMBS = @HAVE_WCSRTOMBS@
+HAVE_WCSSPN = @HAVE_WCSSPN@
+HAVE_WCSSTR = @HAVE_WCSSTR@
+HAVE_WCSTOK = @HAVE_WCSTOK@
+HAVE_WCSWIDTH = @HAVE_WCSWIDTH@
+HAVE_WCSXFRM = @HAVE_WCSXFRM@
+HAVE_WINSOCK2_H = @HAVE_WINSOCK2_H@
+HAVE_WINT_T = @HAVE_WINT_T@
+HAVE_WMEMCHR = @HAVE_WMEMCHR@
+HAVE_WMEMCMP = @HAVE_WMEMCMP@
+HAVE_WMEMCPY = @HAVE_WMEMCPY@
+HAVE_WMEMMOVE = @HAVE_WMEMMOVE@
+HAVE_WMEMPCPY = @HAVE_WMEMPCPY@
+HAVE_WMEMSET = @HAVE_WMEMSET@
+HAVE_WS2TCPIP_H = @HAVE_WS2TCPIP_H@
+HAVE_XLOCALE_H = @HAVE_XLOCALE_H@
+HAVE__BOOL = @HAVE__BOOL@
+HAVE__EXIT = @HAVE__EXIT@
+HOGWEED_CFLAGS = @HOGWEED_CFLAGS@
+HOGWEED_LIBS = @HOGWEED_LIBS@
+HOSTENT_LIB = @HOSTENT_LIB@
+HTML_DIR = @HTML_DIR@
+INCLUDE_NEXT = @INCLUDE_NEXT@
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE = @INCLUDE_NEXT_AS_FIRST_DIRECTIVE@
+INET_NTOP_LIB = @INET_NTOP_LIB@
+INET_PTON_LIB = @INET_PTON_LIB@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+INT32_MAX_LT_INTMAX_MAX = @INT32_MAX_LT_INTMAX_MAX@
+INT64_MAX_EQ_LONG_MAX = @INT64_MAX_EQ_LONG_MAX@
+INTLLIBS = @INTLLIBS@
+INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
+LCOV = @LCOV@
+LD = @LD@
+LDDPOSTPROC = @LDDPOSTPROC@
+LDDPROG = @LDDPROG@
+LDFLAGS = @LDFLAGS@
+LIBATOMIC_LIBS = @LIBATOMIC_LIBS@
+LIBBROTLIDEC_CFLAGS = @LIBBROTLIDEC_CFLAGS@
+LIBBROTLIDEC_LIBS = @LIBBROTLIDEC_LIBS@
+LIBBROTLIENC_CFLAGS = @LIBBROTLIENC_CFLAGS@
+LIBBROTLIENC_LIBS = @LIBBROTLIENC_LIBS@
+LIBCRYPTO = @LIBCRYPTO@
+LIBCRYPTO_PREFIX = @LIBCRYPTO_PREFIX@
+LIBDL = @LIBDL@
+LIBDL_PREFIX = @LIBDL_PREFIX@
+LIBEV = @LIBEV@
+LIBEV_LIBS = @LIBEV_LIBS@
+LIBEV_PREFIX = @LIBEV_PREFIX@
+LIBGNUTLS_CFLAGS = @LIBGNUTLS_CFLAGS@
+LIBGNUTLS_LIBS = @LIBGNUTLS_LIBS@
+LIBICONV = @LIBICONV@
+LIBIDN2_CFLAGS = @LIBIDN2_CFLAGS@
+LIBIDN2_LIBS = @LIBIDN2_LIBS@
+LIBINTL = @LIBINTL@
+LIBKCAPI_CFLAGS = @LIBKCAPI_CFLAGS@
+LIBKCAPI_LIBS = @LIBKCAPI_LIBS@
+LIBMULTITHREAD = @LIBMULTITHREAD@
+LIBOBJS = @LIBOBJS@
+LIBPMULTITHREAD = @LIBPMULTITHREAD@
+LIBPTHREAD = @LIBPTHREAD@
+LIBPTHREAD_PREFIX = @LIBPTHREAD_PREFIX@
+LIBRT = @LIBRT@
+LIBRT_PREFIX = @LIBRT_PREFIX@
+LIBS = @LIBS@
+LIBSECCOMP = @LIBSECCOMP@
+LIBSECCOMP_PREFIX = @LIBSECCOMP_PREFIX@
+LIBSOCKET = @LIBSOCKET@
+LIBSTDTHREAD = @LIBSTDTHREAD@
+LIBTASN1_CFLAGS = @LIBTASN1_CFLAGS@
+LIBTASN1_LIBS = @LIBTASN1_LIBS@
+LIBTESTS_LIBDEPS = @LIBTESTS_LIBDEPS@
+LIBTHREAD = @LIBTHREAD@
+LIBTOOL = @LIBTOOL@
+LIBUNISTRING = @LIBUNISTRING@
+LIBUNISTRING_UNICTYPE_H = @LIBUNISTRING_UNICTYPE_H@
+LIBUNISTRING_UNINORM_H = @LIBUNISTRING_UNINORM_H@
+LIBUNISTRING_UNISTR_H = @LIBUNISTRING_UNISTR_H@
+LIBUNISTRING_UNITYPES_H = @LIBUNISTRING_UNITYPES_H@
+LIBZ = @LIBZ@
+LIBZSTD_CFLAGS = @LIBZSTD_CFLAGS@
+LIBZSTD_LIBS = @LIBZSTD_LIBS@
+LIBZ_PC = @LIBZ_PC@
+LIBZ_PREFIX = @LIBZ_PREFIX@
+LIB_CLOCK_GETTIME = @LIB_CLOCK_GETTIME@
+LIB_NANOSLEEP = @LIB_NANOSLEEP@
+LIB_PTHREAD = @LIB_PTHREAD@
+LIB_PTHREAD_SIGMASK = @LIB_PTHREAD_SIGMASK@
+LIB_SCHED_YIELD = @LIB_SCHED_YIELD@
+LIB_SELECT = @LIB_SELECT@
+LIB_SEMAPHORE = @LIB_SEMAPHORE@
+LIB_SETLOCALE = @LIB_SETLOCALE@
+LIB_SETLOCALE_NULL = @LIB_SETLOCALE_NULL@
+LIMITS_H = @LIMITS_H@
+LIPO = @LIPO@
+LN_S = @LN_S@
+LOCALENAME_ENHANCE_LOCALE_FUNCS = @LOCALENAME_ENHANCE_LOCALE_FUNCS@
+LOCALE_FR = @LOCALE_FR@
+LOCALE_FR_UTF8 = @LOCALE_FR_UTF8@
+LOCALE_JA = @LOCALE_JA@
+LOCALE_TR_UTF8 = @LOCALE_TR_UTF8@
+LOCALE_ZH_CN = @LOCALE_ZH_CN@
+LOG_VALGRIND = @LOG_VALGRIND@
+LTALLOCA = @LTALLOCA@
+LTLIBCRYPTO = @LTLIBCRYPTO@
+LTLIBDL = @LTLIBDL@
+LTLIBEV = @LTLIBEV@
+LTLIBICONV = @LTLIBICONV@
+LTLIBINTL = @LTLIBINTL@
+LTLIBMULTITHREAD = @LTLIBMULTITHREAD@
+LTLIBOBJS = @LTLIBOBJS@
+LTLIBPTHREAD = @LTLIBPTHREAD@
+LTLIBRT = @LTLIBRT@
+LTLIBSECCOMP = @LTLIBSECCOMP@
+LTLIBTHREAD = @LTLIBTHREAD@
+LTLIBZ = @LTLIBZ@
+LT_AGE = @LT_AGE@
+LT_CURRENT = @LT_CURRENT@
+LT_DANE_AGE = @LT_DANE_AGE@
+LT_DANE_CURRENT = @LT_DANE_CURRENT@
+LT_DANE_REVISION = @LT_DANE_REVISION@
+LT_REVISION = @LT_REVISION@
+LT_SSL_AGE = @LT_SSL_AGE@
+LT_SSL_CURRENT = @LT_SSL_CURRENT@
+LT_SSL_REVISION = @LT_SSL_REVISION@
+LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
+LT_XSSL_AGE = @LT_XSSL_AGE@
+LT_XSSL_CURRENT = @LT_XSSL_CURRENT@
+LT_XSSL_REVISION = @LT_XSSL_REVISION@
+MAINT = @MAINT@
+MAJOR_VERSION = @MAJOR_VERSION@
+MAKEINFO = @MAKEINFO@
+MANIFEST_TOOL = @MANIFEST_TOOL@
+MINOR_VERSION = @MINOR_VERSION@
+MKDIR_P = @MKDIR_P@
+MSGFMT = @MSGFMT@
+MSGMERGE = @MSGMERGE@
+MSGMERGE_FOR_MSGFMT_OPTION = @MSGMERGE_FOR_MSGFMT_OPTION@
+NETINET_IN_H = @NETINET_IN_H@
+NETTLE_CFLAGS = @NETTLE_CFLAGS@
+NETTLE_LIBS = @NETTLE_LIBS@
+NEXT_ARPA_INET_H = @NEXT_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H = @NEXT_AS_FIRST_DIRECTIVE_ARPA_INET_H@
+NEXT_AS_FIRST_DIRECTIVE_CTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_CTYPE_H@
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
+NEXT_AS_FIRST_DIRECTIVE_FCNTL_H = @NEXT_AS_FIRST_DIRECTIVE_FCNTL_H@
+NEXT_AS_FIRST_DIRECTIVE_FLOAT_H = @NEXT_AS_FIRST_DIRECTIVE_FLOAT_H@
+NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = @NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H = @NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H@
+NEXT_AS_FIRST_DIRECTIVE_LIMITS_H = @NEXT_AS_FIRST_DIRECTIVE_LIMITS_H@
+NEXT_AS_FIRST_DIRECTIVE_LOCALE_H = @NEXT_AS_FIRST_DIRECTIVE_LOCALE_H@
+NEXT_AS_FIRST_DIRECTIVE_NETDB_H = @NEXT_AS_FIRST_DIRECTIVE_NETDB_H@
+NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H = @NEXT_AS_FIRST_DIRECTIVE_NETINET_IN_H@
+NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H = @NEXT_AS_FIRST_DIRECTIVE_PTHREAD_H@
+NEXT_AS_FIRST_DIRECTIVE_SCHED_H = @NEXT_AS_FIRST_DIRECTIVE_SCHED_H@
+NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H = @NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H@
+NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
+NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
+NEXT_AS_FIRST_DIRECTIVE_STDIO_H = @NEXT_AS_FIRST_DIRECTIVE_STDIO_H@
+NEXT_AS_FIRST_DIRECTIVE_STDLIB_H = @NEXT_AS_FIRST_DIRECTIVE_STDLIB_H@
+NEXT_AS_FIRST_DIRECTIVE_STRINGS_H = @NEXT_AS_FIRST_DIRECTIVE_STRINGS_H@
+NEXT_AS_FIRST_DIRECTIVE_STRING_H = @NEXT_AS_FIRST_DIRECTIVE_STRING_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H@
+NEXT_AS_FIRST_DIRECTIVE_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_UNISTD_H = @NEXT_AS_FIRST_DIRECTIVE_UNISTD_H@
+NEXT_AS_FIRST_DIRECTIVE_WCHAR_H = @NEXT_AS_FIRST_DIRECTIVE_WCHAR_H@
+NEXT_CTYPE_H = @NEXT_CTYPE_H@
+NEXT_ERRNO_H = @NEXT_ERRNO_H@
+NEXT_FCNTL_H = @NEXT_FCNTL_H@
+NEXT_FLOAT_H = @NEXT_FLOAT_H@
+NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
+NEXT_LANGINFO_H = @NEXT_LANGINFO_H@
+NEXT_LIMITS_H = @NEXT_LIMITS_H@
+NEXT_LOCALE_H = @NEXT_LOCALE_H@
+NEXT_NETDB_H = @NEXT_NETDB_H@
+NEXT_NETINET_IN_H = @NEXT_NETINET_IN_H@
+NEXT_PTHREAD_H = @NEXT_PTHREAD_H@
+NEXT_SCHED_H = @NEXT_SCHED_H@
+NEXT_SIGNAL_H = @NEXT_SIGNAL_H@
+NEXT_STDDEF_H = @NEXT_STDDEF_H@
+NEXT_STDINT_H = @NEXT_STDINT_H@
+NEXT_STDIO_H = @NEXT_STDIO_H@
+NEXT_STDLIB_H = @NEXT_STDLIB_H@
+NEXT_STRINGS_H = @NEXT_STRINGS_H@
+NEXT_STRING_H = @NEXT_STRING_H@
+NEXT_SYS_IOCTL_H = @NEXT_SYS_IOCTL_H@
+NEXT_SYS_SELECT_H = @NEXT_SYS_SELECT_H@
+NEXT_SYS_SOCKET_H = @NEXT_SYS_SOCKET_H@
+NEXT_SYS_STAT_H = @NEXT_SYS_STAT_H@
+NEXT_SYS_TIME_H = @NEXT_SYS_TIME_H@
+NEXT_SYS_TYPES_H = @NEXT_SYS_TYPES_H@
+NEXT_SYS_UIO_H = @NEXT_SYS_UIO_H@
+NEXT_TIME_H = @NEXT_TIME_H@
+NEXT_UNISTD_H = @NEXT_UNISTD_H@
+NEXT_WCHAR_H = @NEXT_WCHAR_H@
+NM = @NM@
+NMEDIT = @NMEDIT@
+NUMBER_VERSION = @NUMBER_VERSION@
+OBJDUMP = @OBJDUMP@
+OBJEXT = @OBJEXT@
+OTOOL = @OTOOL@
+OTOOL64 = @OTOOL64@
+P11_KIT_CFLAGS = @P11_KIT_CFLAGS@
+P11_KIT_LIBS = @P11_KIT_LIBS@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
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+PATCH_VERSION = @PATCH_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PKCS12_ITER_COUNT = @PKCS12_ITER_COUNT@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+PMCCABE = @PMCCABE@
+POSUB = @POSUB@
+PRAGMA_COLUMNS = @PRAGMA_COLUMNS@
+PRAGMA_SYSTEM_HEADER = @PRAGMA_SYSTEM_HEADER@
+PRIPTR_PREFIX = @PRIPTR_PREFIX@
+PTHREAD_H_DEFINES_STRUCT_TIMESPEC = @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
+PTRDIFF_T_SUFFIX = @PTRDIFF_T_SUFFIX@
+PYTHON = @PYTHON@
+PYTHON_EXEC_PREFIX = @PYTHON_EXEC_PREFIX@
+PYTHON_PLATFORM = @PYTHON_PLATFORM@
+PYTHON_PREFIX = @PYTHON_PREFIX@
+PYTHON_VERSION = @PYTHON_VERSION@
+RANLIB = @RANLIB@
+REPLACE_ACCESS = @REPLACE_ACCESS@
+REPLACE_ALIGNED_ALLOC = @REPLACE_ALIGNED_ALLOC@
+REPLACE_BTOWC = @REPLACE_BTOWC@
+REPLACE_CALLOC = @REPLACE_CALLOC@
+REPLACE_CANONICALIZE_FILE_NAME = @REPLACE_CANONICALIZE_FILE_NAME@
+REPLACE_CHOWN = @REPLACE_CHOWN@
+REPLACE_CLOSE = @REPLACE_CLOSE@
+REPLACE_CREAT = @REPLACE_CREAT@
+REPLACE_CTIME = @REPLACE_CTIME@
+REPLACE_DPRINTF = @REPLACE_DPRINTF@
+REPLACE_DUP = @REPLACE_DUP@
+REPLACE_DUP2 = @REPLACE_DUP2@
+REPLACE_DUPLOCALE = @REPLACE_DUPLOCALE@
+REPLACE_EXECL = @REPLACE_EXECL@
+REPLACE_EXECLE = @REPLACE_EXECLE@
+REPLACE_EXECLP = @REPLACE_EXECLP@
+REPLACE_EXECV = @REPLACE_EXECV@
+REPLACE_EXECVE = @REPLACE_EXECVE@
+REPLACE_EXECVP = @REPLACE_EXECVP@
+REPLACE_EXECVPE = @REPLACE_EXECVPE@
+REPLACE_FACCESSAT = @REPLACE_FACCESSAT@
+REPLACE_FCHMODAT = @REPLACE_FCHMODAT@
+REPLACE_FCHOWNAT = @REPLACE_FCHOWNAT@
+REPLACE_FCLOSE = @REPLACE_FCLOSE@
+REPLACE_FCNTL = @REPLACE_FCNTL@
+REPLACE_FDOPEN = @REPLACE_FDOPEN@
+REPLACE_FFLUSH = @REPLACE_FFLUSH@
+REPLACE_FFSLL = @REPLACE_FFSLL@
+REPLACE_FOPEN = @REPLACE_FOPEN@
+REPLACE_FPRINTF = @REPLACE_FPRINTF@
+REPLACE_FPURGE = @REPLACE_FPURGE@
+REPLACE_FREE = @REPLACE_FREE@
+REPLACE_FREELOCALE = @REPLACE_FREELOCALE@
+REPLACE_FREOPEN = @REPLACE_FREOPEN@
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+REPLACE_FSEEKO = @REPLACE_FSEEKO@
+REPLACE_FSTAT = @REPLACE_FSTAT@
+REPLACE_FSTATAT = @REPLACE_FSTATAT@
+REPLACE_FTELL = @REPLACE_FTELL@
+REPLACE_FTELLO = @REPLACE_FTELLO@
+REPLACE_FTRUNCATE = @REPLACE_FTRUNCATE@
+REPLACE_FUTIMENS = @REPLACE_FUTIMENS@
+REPLACE_GAI_STRERROR = @REPLACE_GAI_STRERROR@
+REPLACE_GETADDRINFO = @REPLACE_GETADDRINFO@
+REPLACE_GETCWD = @REPLACE_GETCWD@
+REPLACE_GETDELIM = @REPLACE_GETDELIM@
+REPLACE_GETDOMAINNAME = @REPLACE_GETDOMAINNAME@
+REPLACE_GETDTABLESIZE = @REPLACE_GETDTABLESIZE@
+REPLACE_GETGROUPS = @REPLACE_GETGROUPS@
+REPLACE_GETLINE = @REPLACE_GETLINE@
+REPLACE_GETLOGIN_R = @REPLACE_GETLOGIN_R@
+REPLACE_GETPAGESIZE = @REPLACE_GETPAGESIZE@
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+REPLACE_GETTIMEOFDAY = @REPLACE_GETTIMEOFDAY@
+REPLACE_GMTIME = @REPLACE_GMTIME@
+REPLACE_INET_NTOP = @REPLACE_INET_NTOP@
+REPLACE_INET_PTON = @REPLACE_INET_PTON@
+REPLACE_INITSTATE = @REPLACE_INITSTATE@
+REPLACE_IOCTL = @REPLACE_IOCTL@
+REPLACE_ISATTY = @REPLACE_ISATTY@
+REPLACE_ITOLD = @REPLACE_ITOLD@
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+REPLACE_LINK = @REPLACE_LINK@
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+REPLACE_LOCALTIME_R = @REPLACE_LOCALTIME_R@
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+REPLACE_MBRTOWC = @REPLACE_MBRTOWC@
+REPLACE_MBSINIT = @REPLACE_MBSINIT@
+REPLACE_MBSNRTOWCS = @REPLACE_MBSNRTOWCS@
+REPLACE_MBSRTOWCS = @REPLACE_MBSRTOWCS@
+REPLACE_MBSTATE_T = @REPLACE_MBSTATE_T@
+REPLACE_MBTOWC = @REPLACE_MBTOWC@
+REPLACE_MEMCHR = @REPLACE_MEMCHR@
+REPLACE_MEMMEM = @REPLACE_MEMMEM@
+REPLACE_MKDIR = @REPLACE_MKDIR@
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+REPLACE_MKNODAT = @REPLACE_MKNODAT@
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+REPLACE_PTHREAD_ATTR_DESTROY = @REPLACE_PTHREAD_ATTR_DESTROY@
+REPLACE_PTHREAD_ATTR_GETDETACHSTATE = @REPLACE_PTHREAD_ATTR_GETDETACHSTATE@
+REPLACE_PTHREAD_ATTR_INIT = @REPLACE_PTHREAD_ATTR_INIT@
+REPLACE_PTHREAD_ATTR_SETDETACHSTATE = @REPLACE_PTHREAD_ATTR_SETDETACHSTATE@
+REPLACE_PTHREAD_CONDATTR_DESTROY = @REPLACE_PTHREAD_CONDATTR_DESTROY@
+REPLACE_PTHREAD_CONDATTR_INIT = @REPLACE_PTHREAD_CONDATTR_INIT@
+REPLACE_PTHREAD_COND_BROADCAST = @REPLACE_PTHREAD_COND_BROADCAST@
+REPLACE_PTHREAD_COND_DESTROY = @REPLACE_PTHREAD_COND_DESTROY@
+REPLACE_PTHREAD_COND_INIT = @REPLACE_PTHREAD_COND_INIT@
+REPLACE_PTHREAD_COND_SIGNAL = @REPLACE_PTHREAD_COND_SIGNAL@
+REPLACE_PTHREAD_COND_TIMEDWAIT = @REPLACE_PTHREAD_COND_TIMEDWAIT@
+REPLACE_PTHREAD_COND_WAIT = @REPLACE_PTHREAD_COND_WAIT@
+REPLACE_PTHREAD_CREATE = @REPLACE_PTHREAD_CREATE@
+REPLACE_PTHREAD_DETACH = @REPLACE_PTHREAD_DETACH@
+REPLACE_PTHREAD_EQUAL = @REPLACE_PTHREAD_EQUAL@
+REPLACE_PTHREAD_EXIT = @REPLACE_PTHREAD_EXIT@
+REPLACE_PTHREAD_GETSPECIFIC = @REPLACE_PTHREAD_GETSPECIFIC@
+REPLACE_PTHREAD_JOIN = @REPLACE_PTHREAD_JOIN@
+REPLACE_PTHREAD_KEY_CREATE = @REPLACE_PTHREAD_KEY_CREATE@
+REPLACE_PTHREAD_KEY_DELETE = @REPLACE_PTHREAD_KEY_DELETE@
+REPLACE_PTHREAD_MUTEXATTR_DESTROY = @REPLACE_PTHREAD_MUTEXATTR_DESTROY@
+REPLACE_PTHREAD_MUTEXATTR_GETROBUST = @REPLACE_PTHREAD_MUTEXATTR_GETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_GETTYPE = @REPLACE_PTHREAD_MUTEXATTR_GETTYPE@
+REPLACE_PTHREAD_MUTEXATTR_INIT = @REPLACE_PTHREAD_MUTEXATTR_INIT@
+REPLACE_PTHREAD_MUTEXATTR_SETROBUST = @REPLACE_PTHREAD_MUTEXATTR_SETROBUST@
+REPLACE_PTHREAD_MUTEXATTR_SETTYPE = @REPLACE_PTHREAD_MUTEXATTR_SETTYPE@
+REPLACE_PTHREAD_MUTEX_DESTROY = @REPLACE_PTHREAD_MUTEX_DESTROY@
+REPLACE_PTHREAD_MUTEX_INIT = @REPLACE_PTHREAD_MUTEX_INIT@
+REPLACE_PTHREAD_MUTEX_LOCK = @REPLACE_PTHREAD_MUTEX_LOCK@
+REPLACE_PTHREAD_MUTEX_TIMEDLOCK = @REPLACE_PTHREAD_MUTEX_TIMEDLOCK@
+REPLACE_PTHREAD_MUTEX_TRYLOCK = @REPLACE_PTHREAD_MUTEX_TRYLOCK@
+REPLACE_PTHREAD_MUTEX_UNLOCK = @REPLACE_PTHREAD_MUTEX_UNLOCK@
+REPLACE_PTHREAD_ONCE = @REPLACE_PTHREAD_ONCE@
+REPLACE_PTHREAD_RWLOCKATTR_DESTROY = @REPLACE_PTHREAD_RWLOCKATTR_DESTROY@
+REPLACE_PTHREAD_RWLOCKATTR_INIT = @REPLACE_PTHREAD_RWLOCKATTR_INIT@
+REPLACE_PTHREAD_RWLOCK_DESTROY = @REPLACE_PTHREAD_RWLOCK_DESTROY@
+REPLACE_PTHREAD_RWLOCK_INIT = @REPLACE_PTHREAD_RWLOCK_INIT@
+REPLACE_PTHREAD_RWLOCK_RDLOCK = @REPLACE_PTHREAD_RWLOCK_RDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK = @REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYRDLOCK = @REPLACE_PTHREAD_RWLOCK_TRYRDLOCK@
+REPLACE_PTHREAD_RWLOCK_TRYWRLOCK = @REPLACE_PTHREAD_RWLOCK_TRYWRLOCK@
+REPLACE_PTHREAD_RWLOCK_UNLOCK = @REPLACE_PTHREAD_RWLOCK_UNLOCK@
+REPLACE_PTHREAD_RWLOCK_WRLOCK = @REPLACE_PTHREAD_RWLOCK_WRLOCK@
+REPLACE_PTHREAD_SELF = @REPLACE_PTHREAD_SELF@
+REPLACE_PTHREAD_SETSPECIFIC = @REPLACE_PTHREAD_SETSPECIFIC@
+REPLACE_PTHREAD_SIGMASK = @REPLACE_PTHREAD_SIGMASK@
+REPLACE_PTHREAD_SPIN_DESTROY = @REPLACE_PTHREAD_SPIN_DESTROY@
+REPLACE_PTHREAD_SPIN_INIT = @REPLACE_PTHREAD_SPIN_INIT@
+REPLACE_PTHREAD_SPIN_LOCK = @REPLACE_PTHREAD_SPIN_LOCK@
+REPLACE_PTHREAD_SPIN_TRYLOCK = @REPLACE_PTHREAD_SPIN_TRYLOCK@
+REPLACE_PTHREAD_SPIN_UNLOCK = @REPLACE_PTHREAD_SPIN_UNLOCK@
+REPLACE_PTSNAME = @REPLACE_PTSNAME@
+REPLACE_PTSNAME_R = @REPLACE_PTSNAME_R@
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+REPLACE_RAISE = @REPLACE_RAISE@
+REPLACE_RANDOM = @REPLACE_RANDOM@
+REPLACE_RANDOM_R = @REPLACE_RANDOM_R@
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+REPLACE_READLINK = @REPLACE_READLINK@
+REPLACE_READLINKAT = @REPLACE_READLINKAT@
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+REPLACE_REALLOCARRAY = @REPLACE_REALLOCARRAY@
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+REPLACE_SPRINTF = @REPLACE_SPRINTF@
+REPLACE_STAT = @REPLACE_STAT@
+REPLACE_STDIO_READ_FUNCS = @REPLACE_STDIO_READ_FUNCS@
+REPLACE_STDIO_WRITE_FUNCS = @REPLACE_STDIO_WRITE_FUNCS@
+REPLACE_STPNCPY = @REPLACE_STPNCPY@
+REPLACE_STRCASESTR = @REPLACE_STRCASESTR@
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+REPLACE_STRTOUMAX = @REPLACE_STRTOUMAX@
+REPLACE_STRUCT_LCONV = @REPLACE_STRUCT_LCONV@
+REPLACE_STRUCT_TIMEVAL = @REPLACE_STRUCT_TIMEVAL@
+REPLACE_SYMLINK = @REPLACE_SYMLINK@
+REPLACE_SYMLINKAT = @REPLACE_SYMLINKAT@
+REPLACE_TIMEGM = @REPLACE_TIMEGM@
+REPLACE_TMPFILE = @REPLACE_TMPFILE@
+REPLACE_TRUNCATE = @REPLACE_TRUNCATE@
+REPLACE_TTYNAME_R = @REPLACE_TTYNAME_R@
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+REPLACE_USLEEP = @REPLACE_USLEEP@
+REPLACE_UTIMENSAT = @REPLACE_UTIMENSAT@
+REPLACE_VASPRINTF = @REPLACE_VASPRINTF@
+REPLACE_VDPRINTF = @REPLACE_VDPRINTF@
+REPLACE_VFPRINTF = @REPLACE_VFPRINTF@
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+REPLACE_VSNPRINTF = @REPLACE_VSNPRINTF@
+REPLACE_VSPRINTF = @REPLACE_VSPRINTF@
+REPLACE_WCRTOMB = @REPLACE_WCRTOMB@
+REPLACE_WCSFTIME = @REPLACE_WCSFTIME@
+REPLACE_WCSNRTOMBS = @REPLACE_WCSNRTOMBS@
+REPLACE_WCSRTOMBS = @REPLACE_WCSRTOMBS@
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+REPLACE_WCSWIDTH = @REPLACE_WCSWIDTH@
+REPLACE_WCTOB = @REPLACE_WCTOB@
+REPLACE_WCTOMB = @REPLACE_WCTOMB@
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+REPLACE_WRITE = @REPLACE_WRITE@
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+SERVENT_LIB = @SERVENT_LIB@
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+SIZE_T_SUFFIX = @SIZE_T_SUFFIX@
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+STDINT_H = @STDINT_H@
+STRIP = @STRIP@
+SYS_IOCTL_H_HAVE_WINSOCK2_H = @SYS_IOCTL_H_HAVE_WINSOCK2_H@
+SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+SYS_TIME_H_DEFINES_STRUCT_TIMESPEC = @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_STRUCT_TIMESPEC = @TIME_H_DEFINES_STRUCT_TIMESPEC@
+TIME_H_DEFINES_TIME_UTC = @TIME_H_DEFINES_TIME_UTC@
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+UINT32_MAX_LT_UINTMAX_MAX = @UINT32_MAX_LT_UINTMAX_MAX@
+UINT64_MAX_EQ_ULONG_MAX = @UINT64_MAX_EQ_ULONG_MAX@
+UNBOUND_CFLAGS = @UNBOUND_CFLAGS@
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+UNDEFINE_STRTOK_R = @UNDEFINE_STRTOK_R@
+UNISTD_H_DEFINES_STRUCT_TIMESPEC = @UNISTD_H_DEFINES_STRUCT_TIMESPEC@
+UNISTD_H_HAVE_SYS_RANDOM_H = @UNISTD_H_HAVE_SYS_RANDOM_H@
+UNISTD_H_HAVE_WINSOCK2_H = @UNISTD_H_HAVE_WINSOCK2_H@
+UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS = @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
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+ggltests_WITNESS = @ggltests_WITNESS@
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+gltests_LIBOBJS = @gltests_LIBOBJS@
+gltests_LTLIBOBJS = @gltests_LTLIBOBJS@
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+host_vendor = @host_vendor@
+htmldir = @htmldir@
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+infodir = @infodir@
+install_sh = @install_sh@
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+unistring_LIBOBJS = @unistring_LIBOBJS@
+unistring_LTLIBOBJS = @unistring_LTLIBOBJS@
+unistringtests_LIBOBJS = @unistringtests_LIBOBJS@
+unistringtests_LTLIBOBJS = @unistringtests_LTLIBOBJS@
+unistringtests_WITNESS = @unistringtests_WITNESS@
+AUTOMAKE_OPTIONS = 1.11 foreign subdir-objects
+SUBDIRS = .
+TESTS_ENVIRONMENT = EXEEXT='@EXEEXT@' srcdir='$(srcdir)' \
+	LOCALE_FR='@LOCALE_FR@' LOCALE_TR_UTF8='@LOCALE_TR_UTF8@' \
+	LOCALE_FR='@LOCALE_FR@' LOCALE_FR_UTF8='@LOCALE_FR_UTF8@' \
+	LOCALE_JA='@LOCALE_JA@' LOCALE_ZH_CN='@LOCALE_ZH_CN@' \
+	MAKE='$(MAKE)'
+noinst_HEADERS = 
+noinst_LIBRARIES = 
+check_LIBRARIES = libtests.a
+EXTRA_DIST = test-accept.c signature.h macros.h test-alloca-opt.c \
+	test-arpa_inet.c test-array_list.c macros.h atoll.c \
+	test-binary-io.sh test-binary-io.c macros.h test-bind.c \
+	signature.h macros.h test-bitrotate.c macros.h test-byteswap.c \
+	macros.h test-c-ctype.c macros.h test-c-strcase.sh \
+	test-c-strcasecmp.c test-c-strncasecmp.c macros.h \
+	test-calloc-gnu.c macros.h test-cloexec.c macros.h \
+	test-close.c signature.h macros.h test-connect.c signature.h \
+	macros.h ctype.in.h test-ctype.c test-dup2.c signature.h \
+	macros.h test-environ.c test-errno.c test-explicit_bzero.c \
+	signature.h macros.h test-fcntl-h.c test-fcntl.c signature.h \
+	macros.h fdopen.c test-fdopen.c signature.h macros.h \
+	test-fgetc.c signature.h macros.h test-float.c macros.h \
+	test-fopen-gnu.c macros.h test-fopen.h test-fopen.c \
+	signature.h macros.h test-fpending.c test-fpending.sh macros.h \
+	fpucw.h test-fputc.c signature.h macros.h test-fread.c \
+	signature.h macros.h test-free.c macros.h test-fseek.c \
+	test-fseek.sh test-fseek2.sh signature.h macros.h \
+	test-fseeko.c test-fseeko.sh test-fseeko2.sh test-fseeko3.c \
+	test-fseeko3.sh test-fseeko4.c test-fseeko4.sh signature.h \
+	macros.h test-fstat.c signature.h macros.h test-ftell.c \
+	test-ftell.sh test-ftell2.sh test-ftell3.c signature.h \
+	macros.h test-ftello.c test-ftello.sh test-ftello2.sh \
+	test-ftello3.c test-ftello4.c test-ftello4.sh signature.h \
+	macros.h ftruncate.c test-ftruncate.c test-ftruncate.sh \
+	signature.h macros.h test-func.c macros.h test-fwrite.c \
+	signature.h macros.h signature.h test-getaddrinfo.c \
+	getcwd-lgpl.c test-getcwd-lgpl.c signature.h macros.h \
+	test-getdelim.c signature.h macros.h test-getdtablesize.c \
+	signature.h macros.h test-getline.c signature.h macros.h \
+	getpagesize.c test-getpeername.c signature.h macros.h \
+	test-getprogname.c signature.h test-gettimeofday.c test-hash.c \
+	macros.h ignore-value.h test-ignore-value.c test-inet_ntop.c \
+	signature.h macros.h test-inet_pton.c signature.h macros.h \
+	test-intprops.c macros.h anytostr.c inttostr.h macros.h \
+	test-inttostr.c test-inttypes.c ioctl.c w32sock.h test-ioctl.c \
+	signature.h macros.h isblank.c test-isblank.c signature.h \
+	macros.h langinfo.in.h test-langinfo.c test-limits-h.c \
+	test-linked_list.c macros.h test-listen.c signature.h macros.h \
+	locale.in.h test-locale.c localename-table.h localename.h \
+	test-localename.c macros.h test-rwlock1.c test-lock.c \
+	test-once.c atomic-int-gnulib.h test-lseek.c test-lseek.sh \
+	signature.h macros.h lstat.c test-lstat.h test-lstat.c \
+	signature.h macros.h test-malloc-gnu.c macros.h test-malloca.c \
+	test-memchr.c zerosize-ptr.h signature.h macros.h nanosleep.c \
+	test-nanosleep.c signature.h macros.h test-netdb.c \
+	test-netinet_in.c test-nstrftime.c macros.h test-open.h \
+	test-open.c signature.h macros.h test-parse-datetime.c \
+	macros.h test-pathmax.c perror.c macros.h signature.h \
+	test-perror.c test-perror2.c test-perror.sh pipe.c test-pipe.c \
+	signature.h macros.h pthread.in.h test-pthread.c \
+	pthread-thread.c test-pthread-thread.c macros.h \
+	pthread_sigmask.c test-pthread_sigmask1.c \
+	test-pthread_sigmask2.c signature.h macros.h putenv.c raise.c \
+	test-raise.c signature.h macros.h test-read-file.c macros.h \
+	test-realloc-gnu.c macros.h test-reallocarray.c signature.h \
+	macros.h test-recv.c signature.h macros.h test-recvfrom.c \
+	signature.h macros.h same-inode.h sched.in.h test-sched.c \
+	sched_yield.c macros.h signature.h test-select.c test-select.h \
+	test-select-fd.c test-select-in.sh test-select-out.sh \
+	test-select-stdin.c test-send.c signature.h macros.h \
+	test-sendto.c signature.h macros.h test-setenv.c signature.h \
+	macros.h setlocale.c setlocale-lock.c setlocale_null.h \
+	windows-initguard.h test-setlocale_null.c \
+	test-setlocale_null-mt-one.c test-setlocale_null-mt-all.c \
+	test-setlocale1.sh test-setlocale1.c test-setlocale2.sh \
+	test-setlocale2.c signature.h macros.h test-setsockopt.c \
+	signature.h macros.h test-shutdown.c signature.h macros.h \
+	sig-handler.h sigaction.c test-sigaction.c signature.h \
+	macros.h test-signal-h.c sigprocmask.c test-sigprocmask.c \
+	signature.h macros.h sleep.c test-sleep.c signature.h macros.h \
+	_Noreturn.h arg-nonnull.h c++defs.h warn-on-use.h \
+	test-snprintf.c signature.h macros.h test-sockets.c \
+	test-stat.h test-stat.c signature.h macros.h test-stat-time.c \
+	macros.h nap.h test-stdalign.c macros.h test-stdbool.c \
+	test-stddef.c test-stdint.c test-stdio.c test-stdlib.c \
+	test-sys_wait.h test-strerror.c signature.h macros.h \
+	strerror_r.c test-strerror_r.c signature.h macros.h \
+	test-string.c test-strings.c test-strnlen.c zerosize-ptr.h \
+	signature.h macros.h strtol.c strtoll.c test-strtoll.c \
+	signature.h macros.h test-strverscmp.c signature.h macros.h \
+	symlink.c test-symlink.h test-symlink.c signature.h macros.h \
+	sys_ioctl.in.h test-sys_ioctl.c test-sys_select.c signature.h \
+	test-sys_socket.c test-sys_stat.c test-sys_time.c \
+	test-sys_types.c test-sys_uio.c init.sh test-init.sh \
+	thread-optim.h test-thread_self.c test-thread_create.c \
+	macros.h test-time.c test-timespec.c macros.h test-unistd.c \
+	test-unsetenv.c signature.h macros.h usleep.c test-usleep.c \
+	signature.h macros.h test-vasnprintf.c macros.h \
+	test-vasprintf.c signature.h macros.h test-verify.c \
+	test-verify-try.c test-verify.sh vma-iter.h test-vsnprintf.c \
+	signature.h macros.h test-wchar.c windows-thread.c \
+	windows-thread.h windows-tls.c windows-tls.h test-xalloc-die.c \
+	test-xalloc-die.sh
+BUILT_SOURCES = ctype.h langinfo.h locale.h pthread.h sched.h \
+	sys/ioctl.h
+SUFFIXES = 
+
+# This test expects compilation of test-verify-try.c to fail, and
+# each time it fails, the makefile rule does not perform the usual
+#  "mv -f $name.Tpo $name.po, so tell make clean to remove that file.
+MOSTLYCLEANFILES = core *.stackdump ctype.h ctype.h-t test-fpending.t \
+	t-ftell3.tmp t-ftello3.tmp test-getdelim.txt test-getline.txt \
+	langinfo.h langinfo.h-t locale.h locale.h-t pthread.h \
+	pthread.h-t sched.h sched.h-t sys/ioctl.h sys/ioctl.h-t \
+	.deps/test-verify-try.Tpo
+MOSTLYCLEANDIRS = sys
+CLEANFILES = 
+DISTCLEANFILES = 
+MAINTAINERCLEANFILES = 
+AM_CPPFLAGS = \
+  -D@ggltests_WITNESS@=1 \
+  -I. -I$(srcdir) \
+  -I../../.. -I$(srcdir)/../../.. \
+  -I../../../src/gl -I$(srcdir)/../../../src/gl
+
+LDADD = libtests.a ../../../src/gl/libgnu_gpl.la libtests.a ../../../src/gl/libgnu_gpl.la libtests.a $(LIBTESTS_LIBDEPS)
+libtests_a_SOURCES = gl_array_list.h gl_array_list.c binary-io.h \
+	binary-io.c dtotimespec.c hash-pjw.h hash-pjw.c imaxtostr.c \
+	inttostr.c offtostr.c uinttostr.c umaxtostr.c localename.c \
+	localename-table.c setlocale_null.c sig-handler.c \
+	glthread/thread.h glthread/thread.c timespec-add.c \
+	timespec-sub.c vma-iter.c glthread/yield.h
+libtests_a_LIBADD = $(ggltests_LIBOBJS)
+libtests_a_DEPENDENCIES = $(ggltests_LIBOBJS)
+EXTRA_libtests_a_SOURCES = atoll.c fdopen.c ftruncate.c getcwd-lgpl.c \
+	getpagesize.c anytostr.c ioctl.c isblank.c lstat.c nanosleep.c \
+	perror.c pipe.c pthread-thread.c pthread_sigmask.c putenv.c \
+	raise.c sched_yield.c setlocale.c setlocale-lock.c sigaction.c \
+	sigprocmask.c sleep.c strerror_r.c strtol.c strtoll.c \
+	symlink.c usleep.c windows-thread.c windows-tls.c
+AM_LIBTOOLFLAGS = --preserve-dup-deps
+test_accept_LDADD = $(LDADD) @LIBSOCKET@
+test_bind_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+test_c_ctype_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_c_strcasecmp_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_c_strncasecmp_LDADD = $(LDADD) $(LIB_SETLOCALE)
+test_connect_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+test_getaddrinfo_LDADD = $(LDADD) @GETADDRINFO_LIB@ @LIBINTL@
+test_getcwd_lgpl_LDADD = $(LDADD) $(LIBINTL)
+test_getpeername_LDADD = $(LDADD) @LIBSOCKET@
+test_getprogname_LDADD = $(LDADD)
+test_inet_ntop_LDADD = $(LDADD) @INET_NTOP_LIB@
+test_inet_pton_LDADD = $(LDADD) @INET_PTON_LIB@
+test_listen_LDADD = $(LDADD) @LIBSOCKET@
+test_localename_LDADD = $(LDADD) $(LIB_SETLOCALE) @INTL_MACOSX_LIBS@ $(LIBTHREAD)
+test_rwlock1_LDADD = $(LDADD) @LIBMULTITHREAD@ @YIELD_LIB@
+test_lock_LDADD = $(LDADD) @LIBMULTITHREAD@ @YIELD_LIB@ @LIB_SEMAPHORE@
+test_once1_SOURCES = test-once.c
+test_once1_LDADD = $(LDADD) @LIBTHREAD@
+test_once2_SOURCES = test-once.c
+test_once2_LDADD = $(LDADD) @LIBMULTITHREAD@
+test_nanosleep_LDADD = $(LDADD) $(LIB_NANOSLEEP)
+test_parse_datetime_LDADD = $(LDADD) @LIBINTL@ $(LIB_CLOCK_GETTIME)
+test_pthread_thread_LDADD = $(LDADD) @LIBPMULTITHREAD@
+test_pthread_sigmask1_LDADD = $(LDADD) @LIB_PTHREAD_SIGMASK@
+test_pthread_sigmask2_LDADD = $(LDADD) @LIB_PTHREAD_SIGMASK@ @LIBMULTITHREAD@
+test_recv_LDADD = $(LDADD) @LIBSOCKET@
+test_recvfrom_LDADD = $(LDADD) @LIBSOCKET@
+test_select_LDADD = $(LDADD) @LIB_SELECT@ @LIBSOCKET@ $(INET_PTON_LIB)
+test_select_fd_LDADD = $(LDADD) @LIB_SELECT@
+test_select_stdin_LDADD = $(LDADD) @LIB_SELECT@
+test_send_LDADD = $(LDADD) @LIBSOCKET@
+test_sendto_LDADD = $(LDADD) @LIBSOCKET@ $(INET_PTON_LIB)
+test_setlocale_null_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@
+test_setlocale_null_mt_one_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@ $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+test_setlocale_null_mt_all_LDADD = $(LDADD) @LIB_SETLOCALE_NULL@ $(LIBMULTITHREAD) $(LIB_NANOSLEEP)
+test_setlocale1_LDADD = $(LDADD) @LIB_SETLOCALE@
+test_setlocale2_LDADD = $(LDADD) @LIB_SETLOCALE@
+test_setsockopt_LDADD = $(LDADD) @LIBSOCKET@
+test_shutdown_LDADD = $(LDADD) @LIBSOCKET@
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+_NORETURN_H = $(srcdir)/_Noreturn.h
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+ARG_NONNULL_H = $(srcdir)/arg-nonnull.h
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+CXXDEFS_H = $(srcdir)/c++defs.h
+
+# Because this Makefile snippet defines a variable used by other
+# gnulib Makefile snippets, it must be present in all makefiles that
+# need it. This is ensured by the applicability 'all' defined above.
+WARN_ON_USE_H = $(srcdir)/warn-on-use.h
+test_sockets_LDADD = $(LDADD) @LIBSOCKET@
+test_stat_LDADD = $(LDADD) $(LIBINTL)
+test_stat_time_LDADD = $(LDADD) $(LIB_NANOSLEEP)
+test_thread_self_LDADD = $(LDADD) @LIBTHREAD@
+test_thread_create_LDADD = $(LDADD) @LIBMULTITHREAD@
+test_xalloc_die_LDADD = $(LDADD) @LIBINTL@
+all: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) all-recursive
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .log .o .obj .test .test$(EXEEXT) .trs
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign src/gl/tests/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --foreign src/gl/tests/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-checkPROGRAMS:
+	@list='$(check_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+
+clean-noinstPROGRAMS:
+	@list='$(noinst_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+
+clean-checkLIBRARIES:
+	-test -z "$(check_LIBRARIES)" || rm -f $(check_LIBRARIES)
+
+clean-noinstLIBRARIES:
+	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)
+glthread/$(am__dirstamp):
+	@$(MKDIR_P) glthread
+	@: > glthread/$(am__dirstamp)
+glthread/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) glthread/$(DEPDIR)
+	@: > glthread/$(DEPDIR)/$(am__dirstamp)
+glthread/thread.$(OBJEXT): glthread/$(am__dirstamp) \
+	glthread/$(DEPDIR)/$(am__dirstamp)
+
+libtests.a: $(libtests_a_OBJECTS) $(libtests_a_DEPENDENCIES) $(EXTRA_libtests_a_DEPENDENCIES) 
+	$(AM_V_at)-rm -f libtests.a
+	$(AM_V_AR)$(libtests_a_AR) libtests.a $(libtests_a_OBJECTS) $(libtests_a_LIBADD)
+	$(AM_V_at)$(RANLIB) libtests.a
+
+test-accept$(EXEEXT): $(test_accept_OBJECTS) $(test_accept_DEPENDENCIES) $(EXTRA_test_accept_DEPENDENCIES) 
+	@rm -f test-accept$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_accept_OBJECTS) $(test_accept_LDADD) $(LIBS)
+
+test-alloca-opt$(EXEEXT): $(test_alloca_opt_OBJECTS) $(test_alloca_opt_DEPENDENCIES) $(EXTRA_test_alloca_opt_DEPENDENCIES) 
+	@rm -f test-alloca-opt$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_alloca_opt_OBJECTS) $(test_alloca_opt_LDADD) $(LIBS)
+
+test-arpa_inet$(EXEEXT): $(test_arpa_inet_OBJECTS) $(test_arpa_inet_DEPENDENCIES) $(EXTRA_test_arpa_inet_DEPENDENCIES) 
+	@rm -f test-arpa_inet$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_arpa_inet_OBJECTS) $(test_arpa_inet_LDADD) $(LIBS)
+
+test-array_list$(EXEEXT): $(test_array_list_OBJECTS) $(test_array_list_DEPENDENCIES) $(EXTRA_test_array_list_DEPENDENCIES) 
+	@rm -f test-array_list$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_array_list_OBJECTS) $(test_array_list_LDADD) $(LIBS)
+
+test-binary-io$(EXEEXT): $(test_binary_io_OBJECTS) $(test_binary_io_DEPENDENCIES) $(EXTRA_test_binary_io_DEPENDENCIES) 
+	@rm -f test-binary-io$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_binary_io_OBJECTS) $(test_binary_io_LDADD) $(LIBS)
+
+test-bind$(EXEEXT): $(test_bind_OBJECTS) $(test_bind_DEPENDENCIES) $(EXTRA_test_bind_DEPENDENCIES) 
+	@rm -f test-bind$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_bind_OBJECTS) $(test_bind_LDADD) $(LIBS)
+
+test-bitrotate$(EXEEXT): $(test_bitrotate_OBJECTS) $(test_bitrotate_DEPENDENCIES) $(EXTRA_test_bitrotate_DEPENDENCIES) 
+	@rm -f test-bitrotate$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_bitrotate_OBJECTS) $(test_bitrotate_LDADD) $(LIBS)
+
+test-byteswap$(EXEEXT): $(test_byteswap_OBJECTS) $(test_byteswap_DEPENDENCIES) $(EXTRA_test_byteswap_DEPENDENCIES) 
+	@rm -f test-byteswap$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_byteswap_OBJECTS) $(test_byteswap_LDADD) $(LIBS)
+
+test-c-ctype$(EXEEXT): $(test_c_ctype_OBJECTS) $(test_c_ctype_DEPENDENCIES) $(EXTRA_test_c_ctype_DEPENDENCIES) 
+	@rm -f test-c-ctype$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_c_ctype_OBJECTS) $(test_c_ctype_LDADD) $(LIBS)
+
+test-c-strcasecmp$(EXEEXT): $(test_c_strcasecmp_OBJECTS) $(test_c_strcasecmp_DEPENDENCIES) $(EXTRA_test_c_strcasecmp_DEPENDENCIES) 
+	@rm -f test-c-strcasecmp$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_c_strcasecmp_OBJECTS) $(test_c_strcasecmp_LDADD) $(LIBS)
+
+test-c-strncasecmp$(EXEEXT): $(test_c_strncasecmp_OBJECTS) $(test_c_strncasecmp_DEPENDENCIES) $(EXTRA_test_c_strncasecmp_DEPENDENCIES) 
+	@rm -f test-c-strncasecmp$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_c_strncasecmp_OBJECTS) $(test_c_strncasecmp_LDADD) $(LIBS)
+
+test-calloc-gnu$(EXEEXT): $(test_calloc_gnu_OBJECTS) $(test_calloc_gnu_DEPENDENCIES) $(EXTRA_test_calloc_gnu_DEPENDENCIES) 
+	@rm -f test-calloc-gnu$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_calloc_gnu_OBJECTS) $(test_calloc_gnu_LDADD) $(LIBS)
+
+test-cloexec$(EXEEXT): $(test_cloexec_OBJECTS) $(test_cloexec_DEPENDENCIES) $(EXTRA_test_cloexec_DEPENDENCIES) 
+	@rm -f test-cloexec$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_cloexec_OBJECTS) $(test_cloexec_LDADD) $(LIBS)
+
+test-close$(EXEEXT): $(test_close_OBJECTS) $(test_close_DEPENDENCIES) $(EXTRA_test_close_DEPENDENCIES) 
+	@rm -f test-close$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_close_OBJECTS) $(test_close_LDADD) $(LIBS)
+
+test-connect$(EXEEXT): $(test_connect_OBJECTS) $(test_connect_DEPENDENCIES) $(EXTRA_test_connect_DEPENDENCIES) 
+	@rm -f test-connect$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_connect_OBJECTS) $(test_connect_LDADD) $(LIBS)
+
+test-ctype$(EXEEXT): $(test_ctype_OBJECTS) $(test_ctype_DEPENDENCIES) $(EXTRA_test_ctype_DEPENDENCIES) 
+	@rm -f test-ctype$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ctype_OBJECTS) $(test_ctype_LDADD) $(LIBS)
+
+test-dup2$(EXEEXT): $(test_dup2_OBJECTS) $(test_dup2_DEPENDENCIES) $(EXTRA_test_dup2_DEPENDENCIES) 
+	@rm -f test-dup2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_dup2_OBJECTS) $(test_dup2_LDADD) $(LIBS)
+
+test-environ$(EXEEXT): $(test_environ_OBJECTS) $(test_environ_DEPENDENCIES) $(EXTRA_test_environ_DEPENDENCIES) 
+	@rm -f test-environ$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_environ_OBJECTS) $(test_environ_LDADD) $(LIBS)
+
+test-errno$(EXEEXT): $(test_errno_OBJECTS) $(test_errno_DEPENDENCIES) $(EXTRA_test_errno_DEPENDENCIES) 
+	@rm -f test-errno$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_errno_OBJECTS) $(test_errno_LDADD) $(LIBS)
+
+test-explicit_bzero$(EXEEXT): $(test_explicit_bzero_OBJECTS) $(test_explicit_bzero_DEPENDENCIES) $(EXTRA_test_explicit_bzero_DEPENDENCIES) 
+	@rm -f test-explicit_bzero$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_explicit_bzero_OBJECTS) $(test_explicit_bzero_LDADD) $(LIBS)
+
+test-fcntl$(EXEEXT): $(test_fcntl_OBJECTS) $(test_fcntl_DEPENDENCIES) $(EXTRA_test_fcntl_DEPENDENCIES) 
+	@rm -f test-fcntl$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fcntl_OBJECTS) $(test_fcntl_LDADD) $(LIBS)
+
+test-fcntl-h$(EXEEXT): $(test_fcntl_h_OBJECTS) $(test_fcntl_h_DEPENDENCIES) $(EXTRA_test_fcntl_h_DEPENDENCIES) 
+	@rm -f test-fcntl-h$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fcntl_h_OBJECTS) $(test_fcntl_h_LDADD) $(LIBS)
+
+test-fdopen$(EXEEXT): $(test_fdopen_OBJECTS) $(test_fdopen_DEPENDENCIES) $(EXTRA_test_fdopen_DEPENDENCIES) 
+	@rm -f test-fdopen$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fdopen_OBJECTS) $(test_fdopen_LDADD) $(LIBS)
+
+test-fgetc$(EXEEXT): $(test_fgetc_OBJECTS) $(test_fgetc_DEPENDENCIES) $(EXTRA_test_fgetc_DEPENDENCIES) 
+	@rm -f test-fgetc$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fgetc_OBJECTS) $(test_fgetc_LDADD) $(LIBS)
+
+test-float$(EXEEXT): $(test_float_OBJECTS) $(test_float_DEPENDENCIES) $(EXTRA_test_float_DEPENDENCIES) 
+	@rm -f test-float$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_float_OBJECTS) $(test_float_LDADD) $(LIBS)
+
+test-fopen$(EXEEXT): $(test_fopen_OBJECTS) $(test_fopen_DEPENDENCIES) $(EXTRA_test_fopen_DEPENDENCIES) 
+	@rm -f test-fopen$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fopen_OBJECTS) $(test_fopen_LDADD) $(LIBS)
+
+test-fopen-gnu$(EXEEXT): $(test_fopen_gnu_OBJECTS) $(test_fopen_gnu_DEPENDENCIES) $(EXTRA_test_fopen_gnu_DEPENDENCIES) 
+	@rm -f test-fopen-gnu$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fopen_gnu_OBJECTS) $(test_fopen_gnu_LDADD) $(LIBS)
+
+test-fpending$(EXEEXT): $(test_fpending_OBJECTS) $(test_fpending_DEPENDENCIES) $(EXTRA_test_fpending_DEPENDENCIES) 
+	@rm -f test-fpending$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fpending_OBJECTS) $(test_fpending_LDADD) $(LIBS)
+
+test-fputc$(EXEEXT): $(test_fputc_OBJECTS) $(test_fputc_DEPENDENCIES) $(EXTRA_test_fputc_DEPENDENCIES) 
+	@rm -f test-fputc$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fputc_OBJECTS) $(test_fputc_LDADD) $(LIBS)
+
+test-fread$(EXEEXT): $(test_fread_OBJECTS) $(test_fread_DEPENDENCIES) $(EXTRA_test_fread_DEPENDENCIES) 
+	@rm -f test-fread$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fread_OBJECTS) $(test_fread_LDADD) $(LIBS)
+
+test-free$(EXEEXT): $(test_free_OBJECTS) $(test_free_DEPENDENCIES) $(EXTRA_test_free_DEPENDENCIES) 
+	@rm -f test-free$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_free_OBJECTS) $(test_free_LDADD) $(LIBS)
+
+test-fseek$(EXEEXT): $(test_fseek_OBJECTS) $(test_fseek_DEPENDENCIES) $(EXTRA_test_fseek_DEPENDENCIES) 
+	@rm -f test-fseek$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fseek_OBJECTS) $(test_fseek_LDADD) $(LIBS)
+
+test-fseeko$(EXEEXT): $(test_fseeko_OBJECTS) $(test_fseeko_DEPENDENCIES) $(EXTRA_test_fseeko_DEPENDENCIES) 
+	@rm -f test-fseeko$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fseeko_OBJECTS) $(test_fseeko_LDADD) $(LIBS)
+
+test-fseeko3$(EXEEXT): $(test_fseeko3_OBJECTS) $(test_fseeko3_DEPENDENCIES) $(EXTRA_test_fseeko3_DEPENDENCIES) 
+	@rm -f test-fseeko3$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fseeko3_OBJECTS) $(test_fseeko3_LDADD) $(LIBS)
+
+test-fseeko4$(EXEEXT): $(test_fseeko4_OBJECTS) $(test_fseeko4_DEPENDENCIES) $(EXTRA_test_fseeko4_DEPENDENCIES) 
+	@rm -f test-fseeko4$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fseeko4_OBJECTS) $(test_fseeko4_LDADD) $(LIBS)
+
+test-fstat$(EXEEXT): $(test_fstat_OBJECTS) $(test_fstat_DEPENDENCIES) $(EXTRA_test_fstat_DEPENDENCIES) 
+	@rm -f test-fstat$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fstat_OBJECTS) $(test_fstat_LDADD) $(LIBS)
+
+test-ftell$(EXEEXT): $(test_ftell_OBJECTS) $(test_ftell_DEPENDENCIES) $(EXTRA_test_ftell_DEPENDENCIES) 
+	@rm -f test-ftell$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ftell_OBJECTS) $(test_ftell_LDADD) $(LIBS)
+
+test-ftell3$(EXEEXT): $(test_ftell3_OBJECTS) $(test_ftell3_DEPENDENCIES) $(EXTRA_test_ftell3_DEPENDENCIES) 
+	@rm -f test-ftell3$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ftell3_OBJECTS) $(test_ftell3_LDADD) $(LIBS)
+
+test-ftello$(EXEEXT): $(test_ftello_OBJECTS) $(test_ftello_DEPENDENCIES) $(EXTRA_test_ftello_DEPENDENCIES) 
+	@rm -f test-ftello$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ftello_OBJECTS) $(test_ftello_LDADD) $(LIBS)
+
+test-ftello3$(EXEEXT): $(test_ftello3_OBJECTS) $(test_ftello3_DEPENDENCIES) $(EXTRA_test_ftello3_DEPENDENCIES) 
+	@rm -f test-ftello3$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ftello3_OBJECTS) $(test_ftello3_LDADD) $(LIBS)
+
+test-ftello4$(EXEEXT): $(test_ftello4_OBJECTS) $(test_ftello4_DEPENDENCIES) $(EXTRA_test_ftello4_DEPENDENCIES) 
+	@rm -f test-ftello4$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ftello4_OBJECTS) $(test_ftello4_LDADD) $(LIBS)
+
+test-ftruncate$(EXEEXT): $(test_ftruncate_OBJECTS) $(test_ftruncate_DEPENDENCIES) $(EXTRA_test_ftruncate_DEPENDENCIES) 
+	@rm -f test-ftruncate$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ftruncate_OBJECTS) $(test_ftruncate_LDADD) $(LIBS)
+
+test-func$(EXEEXT): $(test_func_OBJECTS) $(test_func_DEPENDENCIES) $(EXTRA_test_func_DEPENDENCIES) 
+	@rm -f test-func$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_func_OBJECTS) $(test_func_LDADD) $(LIBS)
+
+test-fwrite$(EXEEXT): $(test_fwrite_OBJECTS) $(test_fwrite_DEPENDENCIES) $(EXTRA_test_fwrite_DEPENDENCIES) 
+	@rm -f test-fwrite$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_fwrite_OBJECTS) $(test_fwrite_LDADD) $(LIBS)
+
+test-getaddrinfo$(EXEEXT): $(test_getaddrinfo_OBJECTS) $(test_getaddrinfo_DEPENDENCIES) $(EXTRA_test_getaddrinfo_DEPENDENCIES) 
+	@rm -f test-getaddrinfo$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getaddrinfo_OBJECTS) $(test_getaddrinfo_LDADD) $(LIBS)
+
+test-getcwd-lgpl$(EXEEXT): $(test_getcwd_lgpl_OBJECTS) $(test_getcwd_lgpl_DEPENDENCIES) $(EXTRA_test_getcwd_lgpl_DEPENDENCIES) 
+	@rm -f test-getcwd-lgpl$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getcwd_lgpl_OBJECTS) $(test_getcwd_lgpl_LDADD) $(LIBS)
+
+test-getdelim$(EXEEXT): $(test_getdelim_OBJECTS) $(test_getdelim_DEPENDENCIES) $(EXTRA_test_getdelim_DEPENDENCIES) 
+	@rm -f test-getdelim$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getdelim_OBJECTS) $(test_getdelim_LDADD) $(LIBS)
+
+test-getdtablesize$(EXEEXT): $(test_getdtablesize_OBJECTS) $(test_getdtablesize_DEPENDENCIES) $(EXTRA_test_getdtablesize_DEPENDENCIES) 
+	@rm -f test-getdtablesize$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getdtablesize_OBJECTS) $(test_getdtablesize_LDADD) $(LIBS)
+
+test-getline$(EXEEXT): $(test_getline_OBJECTS) $(test_getline_DEPENDENCIES) $(EXTRA_test_getline_DEPENDENCIES) 
+	@rm -f test-getline$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getline_OBJECTS) $(test_getline_LDADD) $(LIBS)
+
+test-getpeername$(EXEEXT): $(test_getpeername_OBJECTS) $(test_getpeername_DEPENDENCIES) $(EXTRA_test_getpeername_DEPENDENCIES) 
+	@rm -f test-getpeername$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getpeername_OBJECTS) $(test_getpeername_LDADD) $(LIBS)
+
+test-getprogname$(EXEEXT): $(test_getprogname_OBJECTS) $(test_getprogname_DEPENDENCIES) $(EXTRA_test_getprogname_DEPENDENCIES) 
+	@rm -f test-getprogname$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_getprogname_OBJECTS) $(test_getprogname_LDADD) $(LIBS)
+
+test-gettimeofday$(EXEEXT): $(test_gettimeofday_OBJECTS) $(test_gettimeofday_DEPENDENCIES) $(EXTRA_test_gettimeofday_DEPENDENCIES) 
+	@rm -f test-gettimeofday$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_gettimeofday_OBJECTS) $(test_gettimeofday_LDADD) $(LIBS)
+
+test-hash$(EXEEXT): $(test_hash_OBJECTS) $(test_hash_DEPENDENCIES) $(EXTRA_test_hash_DEPENDENCIES) 
+	@rm -f test-hash$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_hash_OBJECTS) $(test_hash_LDADD) $(LIBS)
+
+test-ignore-value$(EXEEXT): $(test_ignore_value_OBJECTS) $(test_ignore_value_DEPENDENCIES) $(EXTRA_test_ignore_value_DEPENDENCIES) 
+	@rm -f test-ignore-value$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ignore_value_OBJECTS) $(test_ignore_value_LDADD) $(LIBS)
+
+test-inet_ntop$(EXEEXT): $(test_inet_ntop_OBJECTS) $(test_inet_ntop_DEPENDENCIES) $(EXTRA_test_inet_ntop_DEPENDENCIES) 
+	@rm -f test-inet_ntop$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_inet_ntop_OBJECTS) $(test_inet_ntop_LDADD) $(LIBS)
+
+test-inet_pton$(EXEEXT): $(test_inet_pton_OBJECTS) $(test_inet_pton_DEPENDENCIES) $(EXTRA_test_inet_pton_DEPENDENCIES) 
+	@rm -f test-inet_pton$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_inet_pton_OBJECTS) $(test_inet_pton_LDADD) $(LIBS)
+
+test-intprops$(EXEEXT): $(test_intprops_OBJECTS) $(test_intprops_DEPENDENCIES) $(EXTRA_test_intprops_DEPENDENCIES) 
+	@rm -f test-intprops$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_intprops_OBJECTS) $(test_intprops_LDADD) $(LIBS)
+
+test-inttostr$(EXEEXT): $(test_inttostr_OBJECTS) $(test_inttostr_DEPENDENCIES) $(EXTRA_test_inttostr_DEPENDENCIES) 
+	@rm -f test-inttostr$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_inttostr_OBJECTS) $(test_inttostr_LDADD) $(LIBS)
+
+test-inttypes$(EXEEXT): $(test_inttypes_OBJECTS) $(test_inttypes_DEPENDENCIES) $(EXTRA_test_inttypes_DEPENDENCIES) 
+	@rm -f test-inttypes$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_inttypes_OBJECTS) $(test_inttypes_LDADD) $(LIBS)
+
+test-ioctl$(EXEEXT): $(test_ioctl_OBJECTS) $(test_ioctl_DEPENDENCIES) $(EXTRA_test_ioctl_DEPENDENCIES) 
+	@rm -f test-ioctl$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_ioctl_OBJECTS) $(test_ioctl_LDADD) $(LIBS)
+
+test-isblank$(EXEEXT): $(test_isblank_OBJECTS) $(test_isblank_DEPENDENCIES) $(EXTRA_test_isblank_DEPENDENCIES) 
+	@rm -f test-isblank$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_isblank_OBJECTS) $(test_isblank_LDADD) $(LIBS)
+
+test-langinfo$(EXEEXT): $(test_langinfo_OBJECTS) $(test_langinfo_DEPENDENCIES) $(EXTRA_test_langinfo_DEPENDENCIES) 
+	@rm -f test-langinfo$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_langinfo_OBJECTS) $(test_langinfo_LDADD) $(LIBS)
+
+test-limits-h$(EXEEXT): $(test_limits_h_OBJECTS) $(test_limits_h_DEPENDENCIES) $(EXTRA_test_limits_h_DEPENDENCIES) 
+	@rm -f test-limits-h$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_limits_h_OBJECTS) $(test_limits_h_LDADD) $(LIBS)
+
+test-linked_list$(EXEEXT): $(test_linked_list_OBJECTS) $(test_linked_list_DEPENDENCIES) $(EXTRA_test_linked_list_DEPENDENCIES) 
+	@rm -f test-linked_list$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_linked_list_OBJECTS) $(test_linked_list_LDADD) $(LIBS)
+
+test-listen$(EXEEXT): $(test_listen_OBJECTS) $(test_listen_DEPENDENCIES) $(EXTRA_test_listen_DEPENDENCIES) 
+	@rm -f test-listen$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_listen_OBJECTS) $(test_listen_LDADD) $(LIBS)
+
+test-locale$(EXEEXT): $(test_locale_OBJECTS) $(test_locale_DEPENDENCIES) $(EXTRA_test_locale_DEPENDENCIES) 
+	@rm -f test-locale$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_locale_OBJECTS) $(test_locale_LDADD) $(LIBS)
+
+test-localename$(EXEEXT): $(test_localename_OBJECTS) $(test_localename_DEPENDENCIES) $(EXTRA_test_localename_DEPENDENCIES) 
+	@rm -f test-localename$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_localename_OBJECTS) $(test_localename_LDADD) $(LIBS)
+
+test-lock$(EXEEXT): $(test_lock_OBJECTS) $(test_lock_DEPENDENCIES) $(EXTRA_test_lock_DEPENDENCIES) 
+	@rm -f test-lock$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_lock_OBJECTS) $(test_lock_LDADD) $(LIBS)
+
+test-lseek$(EXEEXT): $(test_lseek_OBJECTS) $(test_lseek_DEPENDENCIES) $(EXTRA_test_lseek_DEPENDENCIES) 
+	@rm -f test-lseek$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_lseek_OBJECTS) $(test_lseek_LDADD) $(LIBS)
+
+test-lstat$(EXEEXT): $(test_lstat_OBJECTS) $(test_lstat_DEPENDENCIES) $(EXTRA_test_lstat_DEPENDENCIES) 
+	@rm -f test-lstat$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_lstat_OBJECTS) $(test_lstat_LDADD) $(LIBS)
+
+test-malloc-gnu$(EXEEXT): $(test_malloc_gnu_OBJECTS) $(test_malloc_gnu_DEPENDENCIES) $(EXTRA_test_malloc_gnu_DEPENDENCIES) 
+	@rm -f test-malloc-gnu$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_malloc_gnu_OBJECTS) $(test_malloc_gnu_LDADD) $(LIBS)
+
+test-malloca$(EXEEXT): $(test_malloca_OBJECTS) $(test_malloca_DEPENDENCIES) $(EXTRA_test_malloca_DEPENDENCIES) 
+	@rm -f test-malloca$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_malloca_OBJECTS) $(test_malloca_LDADD) $(LIBS)
+
+test-memchr$(EXEEXT): $(test_memchr_OBJECTS) $(test_memchr_DEPENDENCIES) $(EXTRA_test_memchr_DEPENDENCIES) 
+	@rm -f test-memchr$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_memchr_OBJECTS) $(test_memchr_LDADD) $(LIBS)
+
+test-nanosleep$(EXEEXT): $(test_nanosleep_OBJECTS) $(test_nanosleep_DEPENDENCIES) $(EXTRA_test_nanosleep_DEPENDENCIES) 
+	@rm -f test-nanosleep$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_nanosleep_OBJECTS) $(test_nanosleep_LDADD) $(LIBS)
+
+test-netdb$(EXEEXT): $(test_netdb_OBJECTS) $(test_netdb_DEPENDENCIES) $(EXTRA_test_netdb_DEPENDENCIES) 
+	@rm -f test-netdb$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_netdb_OBJECTS) $(test_netdb_LDADD) $(LIBS)
+
+test-netinet_in$(EXEEXT): $(test_netinet_in_OBJECTS) $(test_netinet_in_DEPENDENCIES) $(EXTRA_test_netinet_in_DEPENDENCIES) 
+	@rm -f test-netinet_in$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_netinet_in_OBJECTS) $(test_netinet_in_LDADD) $(LIBS)
+
+test-nstrftime$(EXEEXT): $(test_nstrftime_OBJECTS) $(test_nstrftime_DEPENDENCIES) $(EXTRA_test_nstrftime_DEPENDENCIES) 
+	@rm -f test-nstrftime$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_nstrftime_OBJECTS) $(test_nstrftime_LDADD) $(LIBS)
+
+test-once1$(EXEEXT): $(test_once1_OBJECTS) $(test_once1_DEPENDENCIES) $(EXTRA_test_once1_DEPENDENCIES) 
+	@rm -f test-once1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_once1_OBJECTS) $(test_once1_LDADD) $(LIBS)
+
+test-once2$(EXEEXT): $(test_once2_OBJECTS) $(test_once2_DEPENDENCIES) $(EXTRA_test_once2_DEPENDENCIES) 
+	@rm -f test-once2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_once2_OBJECTS) $(test_once2_LDADD) $(LIBS)
+
+test-open$(EXEEXT): $(test_open_OBJECTS) $(test_open_DEPENDENCIES) $(EXTRA_test_open_DEPENDENCIES) 
+	@rm -f test-open$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_open_OBJECTS) $(test_open_LDADD) $(LIBS)
+
+test-parse-datetime$(EXEEXT): $(test_parse_datetime_OBJECTS) $(test_parse_datetime_DEPENDENCIES) $(EXTRA_test_parse_datetime_DEPENDENCIES) 
+	@rm -f test-parse-datetime$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_parse_datetime_OBJECTS) $(test_parse_datetime_LDADD) $(LIBS)
+
+test-pathmax$(EXEEXT): $(test_pathmax_OBJECTS) $(test_pathmax_DEPENDENCIES) $(EXTRA_test_pathmax_DEPENDENCIES) 
+	@rm -f test-pathmax$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pathmax_OBJECTS) $(test_pathmax_LDADD) $(LIBS)
+
+test-perror$(EXEEXT): $(test_perror_OBJECTS) $(test_perror_DEPENDENCIES) $(EXTRA_test_perror_DEPENDENCIES) 
+	@rm -f test-perror$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_perror_OBJECTS) $(test_perror_LDADD) $(LIBS)
+
+test-perror2$(EXEEXT): $(test_perror2_OBJECTS) $(test_perror2_DEPENDENCIES) $(EXTRA_test_perror2_DEPENDENCIES) 
+	@rm -f test-perror2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_perror2_OBJECTS) $(test_perror2_LDADD) $(LIBS)
+
+test-pipe$(EXEEXT): $(test_pipe_OBJECTS) $(test_pipe_DEPENDENCIES) $(EXTRA_test_pipe_DEPENDENCIES) 
+	@rm -f test-pipe$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pipe_OBJECTS) $(test_pipe_LDADD) $(LIBS)
+
+test-pthread$(EXEEXT): $(test_pthread_OBJECTS) $(test_pthread_DEPENDENCIES) $(EXTRA_test_pthread_DEPENDENCIES) 
+	@rm -f test-pthread$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pthread_OBJECTS) $(test_pthread_LDADD) $(LIBS)
+
+test-pthread-thread$(EXEEXT): $(test_pthread_thread_OBJECTS) $(test_pthread_thread_DEPENDENCIES) $(EXTRA_test_pthread_thread_DEPENDENCIES) 
+	@rm -f test-pthread-thread$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pthread_thread_OBJECTS) $(test_pthread_thread_LDADD) $(LIBS)
+
+test-pthread_sigmask1$(EXEEXT): $(test_pthread_sigmask1_OBJECTS) $(test_pthread_sigmask1_DEPENDENCIES) $(EXTRA_test_pthread_sigmask1_DEPENDENCIES) 
+	@rm -f test-pthread_sigmask1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pthread_sigmask1_OBJECTS) $(test_pthread_sigmask1_LDADD) $(LIBS)
+
+test-pthread_sigmask2$(EXEEXT): $(test_pthread_sigmask2_OBJECTS) $(test_pthread_sigmask2_DEPENDENCIES) $(EXTRA_test_pthread_sigmask2_DEPENDENCIES) 
+	@rm -f test-pthread_sigmask2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_pthread_sigmask2_OBJECTS) $(test_pthread_sigmask2_LDADD) $(LIBS)
+
+test-raise$(EXEEXT): $(test_raise_OBJECTS) $(test_raise_DEPENDENCIES) $(EXTRA_test_raise_DEPENDENCIES) 
+	@rm -f test-raise$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_raise_OBJECTS) $(test_raise_LDADD) $(LIBS)
+
+test-read-file$(EXEEXT): $(test_read_file_OBJECTS) $(test_read_file_DEPENDENCIES) $(EXTRA_test_read_file_DEPENDENCIES) 
+	@rm -f test-read-file$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_read_file_OBJECTS) $(test_read_file_LDADD) $(LIBS)
+
+test-realloc-gnu$(EXEEXT): $(test_realloc_gnu_OBJECTS) $(test_realloc_gnu_DEPENDENCIES) $(EXTRA_test_realloc_gnu_DEPENDENCIES) 
+	@rm -f test-realloc-gnu$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_realloc_gnu_OBJECTS) $(test_realloc_gnu_LDADD) $(LIBS)
+
+test-reallocarray$(EXEEXT): $(test_reallocarray_OBJECTS) $(test_reallocarray_DEPENDENCIES) $(EXTRA_test_reallocarray_DEPENDENCIES) 
+	@rm -f test-reallocarray$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_reallocarray_OBJECTS) $(test_reallocarray_LDADD) $(LIBS)
+
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+	@rm -f test-recv$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_recv_OBJECTS) $(test_recv_LDADD) $(LIBS)
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+	@rm -f test-recvfrom$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_recvfrom_OBJECTS) $(test_recvfrom_LDADD) $(LIBS)
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+	@rm -f test-rwlock1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_rwlock1_OBJECTS) $(test_rwlock1_LDADD) $(LIBS)
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+	@rm -f test-sched$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sched_OBJECTS) $(test_sched_LDADD) $(LIBS)
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+	@rm -f test-select$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_select_OBJECTS) $(test_select_LDADD) $(LIBS)
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+	@rm -f test-select-fd$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_select_fd_OBJECTS) $(test_select_fd_LDADD) $(LIBS)
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+	@rm -f test-select-stdin$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_select_stdin_OBJECTS) $(test_select_stdin_LDADD) $(LIBS)
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+	@rm -f test-send$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_send_OBJECTS) $(test_send_LDADD) $(LIBS)
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+	@rm -f test-sendto$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sendto_OBJECTS) $(test_sendto_LDADD) $(LIBS)
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+	@rm -f test-setenv$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setenv_OBJECTS) $(test_setenv_LDADD) $(LIBS)
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+	@rm -f test-setlocale1$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale1_OBJECTS) $(test_setlocale1_LDADD) $(LIBS)
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+	@rm -f test-setlocale2$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale2_OBJECTS) $(test_setlocale2_LDADD) $(LIBS)
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+	@rm -f test-setlocale_null$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale_null_OBJECTS) $(test_setlocale_null_LDADD) $(LIBS)
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+	@rm -f test-setlocale_null-mt-all$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale_null_mt_all_OBJECTS) $(test_setlocale_null_mt_all_LDADD) $(LIBS)
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+	@rm -f test-setlocale_null-mt-one$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setlocale_null_mt_one_OBJECTS) $(test_setlocale_null_mt_one_LDADD) $(LIBS)
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+	@rm -f test-setsockopt$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_setsockopt_OBJECTS) $(test_setsockopt_LDADD) $(LIBS)
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+	@rm -f test-shutdown$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_shutdown_OBJECTS) $(test_shutdown_LDADD) $(LIBS)
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+	@rm -f test-sigaction$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sigaction_OBJECTS) $(test_sigaction_LDADD) $(LIBS)
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+	@rm -f test-signal-h$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_signal_h_OBJECTS) $(test_signal_h_LDADD) $(LIBS)
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+	@rm -f test-sigprocmask$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sigprocmask_OBJECTS) $(test_sigprocmask_LDADD) $(LIBS)
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+	@rm -f test-sleep$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sleep_OBJECTS) $(test_sleep_LDADD) $(LIBS)
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+	@rm -f test-snprintf$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_snprintf_OBJECTS) $(test_snprintf_LDADD) $(LIBS)
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+	@rm -f test-sockets$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_sockets_OBJECTS) $(test_sockets_LDADD) $(LIBS)
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+	$(AM_V_CCLD)$(LINK) $(test_stat_OBJECTS) $(test_stat_LDADD) $(LIBS)
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+	@rm -f test-stat-time$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_stat_time_OBJECTS) $(test_stat_time_LDADD) $(LIBS)
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+	@rm -f test-stdalign$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_stdalign_OBJECTS) $(test_stdalign_LDADD) $(LIBS)
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+	@rm -f test-stdbool$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_stdbool_OBJECTS) $(test_stdbool_LDADD) $(LIBS)
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+	@rm -f test-stddef$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_stddef_OBJECTS) $(test_stddef_LDADD) $(LIBS)
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+	@rm -f test-stdint$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_stdint_OBJECTS) $(test_stdint_LDADD) $(LIBS)
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+	@rm -f test-stdio$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_stdio_OBJECTS) $(test_stdio_LDADD) $(LIBS)
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+	@rm -f test-stdlib$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_stdlib_OBJECTS) $(test_stdlib_LDADD) $(LIBS)
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+	@rm -f test-strerror$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_strerror_OBJECTS) $(test_strerror_LDADD) $(LIBS)
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+	@rm -f test-strerror_r$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_strerror_r_OBJECTS) $(test_strerror_r_LDADD) $(LIBS)
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+	@rm -f test-strnlen$(EXEEXT)
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+	@rm -f test-strtoll$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_strtoll_OBJECTS) $(test_strtoll_LDADD) $(LIBS)
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+	@rm -f test-sys_ioctl$(EXEEXT)
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+	@rm -f test-sys_socket$(EXEEXT)
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+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	set x; \
+	here=`pwd`; \
+	if ($(ETAGS) --etags-include --version) >/dev/null 2>&1; then \
+	  include_option=--etags-include; \
+	  empty_fix=.; \
+	else \
+	  include_option=--include; \
+	  empty_fix=; \
+	fi; \
+	list='$(SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    test ! -f $$subdir/TAGS || \
+	      set "$$@" "$$include_option=$$here/$$subdir/TAGS"; \
+	  fi; \
+	done; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-recursive
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-recursive
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+# Recover from deleted '.trs' file; this should ensure that
+# "rm -f foo.log; make foo.trs" re-run 'foo.test', and re-create
+# both 'foo.log' and 'foo.trs'.  Break the recipe in two subshells
+# to avoid problems with "make -n".
+.log.trs:
+	rm -f $< $@
+	$(MAKE) $(AM_MAKEFLAGS) $<
+
+# Leading 'am--fnord' is there to ensure the list of targets does not
+# expand to empty, as could happen e.g. with make check TESTS=''.
+am--fnord $(TEST_LOGS) $(TEST_LOGS:.log=.trs): $(am__force_recheck)
+am--force-recheck:
+	@:
+
+$(TEST_SUITE_LOG): $(TEST_LOGS)
+	@$(am__set_TESTS_bases); \
+	am__f_ok () { test -f "$$1" && test -r "$$1"; }; \
+	redo_bases=`for i in $$bases; do \
+	              am__f_ok $$i.trs && am__f_ok $$i.log || echo $$i; \
+	            done`; \
+	if test -n "$$redo_bases"; then \
+	  redo_logs=`for i in $$redo_bases; do echo $$i.log; done`; \
+	  redo_results=`for i in $$redo_bases; do echo $$i.trs; done`; \
+	  if $(am__make_dryrun); then :; else \
+	    rm -f $$redo_logs && rm -f $$redo_results || exit 1; \
+	  fi; \
+	fi; \
+	if test -n "$$am__remaking_logs"; then \
+	  echo "fatal: making $(TEST_SUITE_LOG): possible infinite" \
+	       "recursion detected" >&2; \
+	elif test -n "$$redo_logs"; then \
+	  am__remaking_logs=yes $(MAKE) $(AM_MAKEFLAGS) $$redo_logs; \
+	fi; \
+	if $(am__make_dryrun); then :; else \
+	  st=0;  \
+	  errmsg="fatal: making $(TEST_SUITE_LOG): failed to create"; \
+	  for i in $$redo_bases; do \
+	    test -f $$i.trs && test -r $$i.trs \
+	      || { echo "$$errmsg $$i.trs" >&2; st=1; }; \
+	    test -f $$i.log && test -r $$i.log \
+	      || { echo "$$errmsg $$i.log" >&2; st=1; }; \
+	  done; \
+	  test $$st -eq 0 || exit 1; \
+	fi
+	@$(am__sh_e_setup); $(am__tty_colors); $(am__set_TESTS_bases); \
+	ws='[ 	]'; \
+	results=`for b in $$bases; do echo $$b.trs; done`; \
+	test -n "$$results" || results=/dev/null; \
+	all=`  grep "^$$ws*:test-result:"           $$results | wc -l`; \
+	pass=` grep "^$$ws*:test-result:$$ws*PASS"  $$results | wc -l`; \
+	fail=` grep "^$$ws*:test-result:$$ws*FAIL"  $$results | wc -l`; \
+	skip=` grep "^$$ws*:test-result:$$ws*SKIP"  $$results | wc -l`; \
+	xfail=`grep "^$$ws*:test-result:$$ws*XFAIL" $$results | wc -l`; \
+	xpass=`grep "^$$ws*:test-result:$$ws*XPASS" $$results | wc -l`; \
+	error=`grep "^$$ws*:test-result:$$ws*ERROR" $$results | wc -l`; \
+	if test `expr $$fail + $$xpass + $$error` -eq 0; then \
+	  success=true; \
+	else \
+	  success=false; \
+	fi; \
+	br='==================='; br=$$br$$br$$br$$br; \
+	result_count () \
+	{ \
+	    if test x"$$1" = x"--maybe-color"; then \
+	      maybe_colorize=yes; \
+	    elif test x"$$1" = x"--no-color"; then \
+	      maybe_colorize=no; \
+	    else \
+	      echo "$@: invalid 'result_count' usage" >&2; exit 4; \
+	    fi; \
+	    shift; \
+	    desc=$$1 count=$$2; \
+	    if test $$maybe_colorize = yes && test $$count -gt 0; then \
+	      color_start=$$3 color_end=$$std; \
+	    else \
+	      color_start= color_end=; \
+	    fi; \
+	    echo "$${color_start}# $$desc $$count$${color_end}"; \
+	}; \
+	create_testsuite_report () \
+	{ \
+	  result_count $$1 "TOTAL:" $$all   "$$brg"; \
+	  result_count $$1 "PASS: " $$pass  "$$grn"; \
+	  result_count $$1 "SKIP: " $$skip  "$$blu"; \
+	  result_count $$1 "XFAIL:" $$xfail "$$lgn"; \
+	  result_count $$1 "FAIL: " $$fail  "$$red"; \
+	  result_count $$1 "XPASS:" $$xpass "$$red"; \
+	  result_count $$1 "ERROR:" $$error "$$mgn"; \
+	}; \
+	{								\
+	  echo "$(PACKAGE_STRING): $(subdir)/$(TEST_SUITE_LOG)" |	\
+	    $(am__rst_title);						\
+	  create_testsuite_report --no-color;				\
+	  echo;								\
+	  echo ".. contents:: :depth: 2";				\
+	  echo;								\
+	  for b in $$bases; do echo $$b; done				\
+	    | $(am__create_global_log);					\
+	} >$(TEST_SUITE_LOG).tmp || exit 1;				\
+	mv $(TEST_SUITE_LOG).tmp $(TEST_SUITE_LOG);			\
+	if $$success; then						\
+	  col="$$grn";							\
+	 else								\
+	  col="$$red";							\
+	  test x"$$VERBOSE" = x || cat $(TEST_SUITE_LOG);		\
+	fi;								\
+	echo "$${col}$$br$${std}"; 					\
+	echo "$${col}Testsuite summary"$(AM_TESTSUITE_SUMMARY_HEADER)"$${std}";	\
+	echo "$${col}$$br$${std}"; 					\
+	create_testsuite_report --maybe-color;				\
+	echo "$$col$$br$$std";						\
+	if $$success; then :; else					\
+	  echo "$${col}See $(subdir)/$(TEST_SUITE_LOG)$${std}";		\
+	  if test -n "$(PACKAGE_BUGREPORT)"; then			\
+	    echo "$${col}Please report to $(PACKAGE_BUGREPORT)$${std}";	\
+	  fi;								\
+	  echo "$$col$$br$$std";					\
+	fi;								\
+	$$success || exit 1
+
+check-TESTS: $(check_PROGRAMS) $(check_LIBRARIES)
+	@list='$(RECHECK_LOGS)';           test -z "$$list" || rm -f $$list
+	@list='$(RECHECK_LOGS:.log=.trs)'; test -z "$$list" || rm -f $$list
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	trs_list=`for i in $$bases; do echo $$i.trs; done`; \
+	log_list=`echo $$log_list`; trs_list=`echo $$trs_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) TEST_LOGS="$$log_list"; \
+	exit $$?;
+recheck: all $(check_PROGRAMS) $(check_LIBRARIES)
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	bases=`for i in $$bases; do echo $$i; done \
+	         | $(am__list_recheck_tests)` || exit 1; \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	log_list=`echo $$log_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) \
+	        am__force_recheck=am--force-recheck \
+	        TEST_LOGS="$$log_list"; \
+	exit $$?
+test-accept.log: test-accept$(EXEEXT)
+	@p='test-accept$(EXEEXT)'; \
+	b='test-accept'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-alloca-opt.log: test-alloca-opt$(EXEEXT)
+	@p='test-alloca-opt$(EXEEXT)'; \
+	b='test-alloca-opt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-arpa_inet.log: test-arpa_inet$(EXEEXT)
+	@p='test-arpa_inet$(EXEEXT)'; \
+	b='test-arpa_inet'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-array_list.log: test-array_list$(EXEEXT)
+	@p='test-array_list$(EXEEXT)'; \
+	b='test-array_list'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-binary-io.sh.log: test-binary-io.sh
+	@p='test-binary-io.sh'; \
+	b='test-binary-io.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-bind.log: test-bind$(EXEEXT)
+	@p='test-bind$(EXEEXT)'; \
+	b='test-bind'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-bitrotate.log: test-bitrotate$(EXEEXT)
+	@p='test-bitrotate$(EXEEXT)'; \
+	b='test-bitrotate'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-byteswap.log: test-byteswap$(EXEEXT)
+	@p='test-byteswap$(EXEEXT)'; \
+	b='test-byteswap'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-c-ctype.log: test-c-ctype$(EXEEXT)
+	@p='test-c-ctype$(EXEEXT)'; \
+	b='test-c-ctype'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-c-strcase.sh.log: test-c-strcase.sh
+	@p='test-c-strcase.sh'; \
+	b='test-c-strcase.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-calloc-gnu.log: test-calloc-gnu$(EXEEXT)
+	@p='test-calloc-gnu$(EXEEXT)'; \
+	b='test-calloc-gnu'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-cloexec.log: test-cloexec$(EXEEXT)
+	@p='test-cloexec$(EXEEXT)'; \
+	b='test-cloexec'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-close.log: test-close$(EXEEXT)
+	@p='test-close$(EXEEXT)'; \
+	b='test-close'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-connect.log: test-connect$(EXEEXT)
+	@p='test-connect$(EXEEXT)'; \
+	b='test-connect'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ctype.log: test-ctype$(EXEEXT)
+	@p='test-ctype$(EXEEXT)'; \
+	b='test-ctype'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-dup2.log: test-dup2$(EXEEXT)
+	@p='test-dup2$(EXEEXT)'; \
+	b='test-dup2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-environ.log: test-environ$(EXEEXT)
+	@p='test-environ$(EXEEXT)'; \
+	b='test-environ'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-errno.log: test-errno$(EXEEXT)
+	@p='test-errno$(EXEEXT)'; \
+	b='test-errno'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-explicit_bzero.log: test-explicit_bzero$(EXEEXT)
+	@p='test-explicit_bzero$(EXEEXT)'; \
+	b='test-explicit_bzero'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fcntl-h.log: test-fcntl-h$(EXEEXT)
+	@p='test-fcntl-h$(EXEEXT)'; \
+	b='test-fcntl-h'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fcntl.log: test-fcntl$(EXEEXT)
+	@p='test-fcntl$(EXEEXT)'; \
+	b='test-fcntl'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fdopen.log: test-fdopen$(EXEEXT)
+	@p='test-fdopen$(EXEEXT)'; \
+	b='test-fdopen'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fgetc.log: test-fgetc$(EXEEXT)
+	@p='test-fgetc$(EXEEXT)'; \
+	b='test-fgetc'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-float.log: test-float$(EXEEXT)
+	@p='test-float$(EXEEXT)'; \
+	b='test-float'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fopen-gnu.log: test-fopen-gnu$(EXEEXT)
+	@p='test-fopen-gnu$(EXEEXT)'; \
+	b='test-fopen-gnu'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fopen.log: test-fopen$(EXEEXT)
+	@p='test-fopen$(EXEEXT)'; \
+	b='test-fopen'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fpending.sh.log: test-fpending.sh
+	@p='test-fpending.sh'; \
+	b='test-fpending.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fputc.log: test-fputc$(EXEEXT)
+	@p='test-fputc$(EXEEXT)'; \
+	b='test-fputc'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fread.log: test-fread$(EXEEXT)
+	@p='test-fread$(EXEEXT)'; \
+	b='test-fread'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-free.log: test-free$(EXEEXT)
+	@p='test-free$(EXEEXT)'; \
+	b='test-free'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fseek.sh.log: test-fseek.sh
+	@p='test-fseek.sh'; \
+	b='test-fseek.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fseek2.sh.log: test-fseek2.sh
+	@p='test-fseek2.sh'; \
+	b='test-fseek2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fseeko.sh.log: test-fseeko.sh
+	@p='test-fseeko.sh'; \
+	b='test-fseeko.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fseeko2.sh.log: test-fseeko2.sh
+	@p='test-fseeko2.sh'; \
+	b='test-fseeko2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fseeko3.sh.log: test-fseeko3.sh
+	@p='test-fseeko3.sh'; \
+	b='test-fseeko3.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fseeko4.sh.log: test-fseeko4.sh
+	@p='test-fseeko4.sh'; \
+	b='test-fseeko4.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fstat.log: test-fstat$(EXEEXT)
+	@p='test-fstat$(EXEEXT)'; \
+	b='test-fstat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ftell.sh.log: test-ftell.sh
+	@p='test-ftell.sh'; \
+	b='test-ftell.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ftell2.sh.log: test-ftell2.sh
+	@p='test-ftell2.sh'; \
+	b='test-ftell2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ftell3.log: test-ftell3$(EXEEXT)
+	@p='test-ftell3$(EXEEXT)'; \
+	b='test-ftell3'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ftello.sh.log: test-ftello.sh
+	@p='test-ftello.sh'; \
+	b='test-ftello.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ftello2.sh.log: test-ftello2.sh
+	@p='test-ftello2.sh'; \
+	b='test-ftello2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ftello3.log: test-ftello3$(EXEEXT)
+	@p='test-ftello3$(EXEEXT)'; \
+	b='test-ftello3'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ftello4.sh.log: test-ftello4.sh
+	@p='test-ftello4.sh'; \
+	b='test-ftello4.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ftruncate.sh.log: test-ftruncate.sh
+	@p='test-ftruncate.sh'; \
+	b='test-ftruncate.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-func.log: test-func$(EXEEXT)
+	@p='test-func$(EXEEXT)'; \
+	b='test-func'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-fwrite.log: test-fwrite$(EXEEXT)
+	@p='test-fwrite$(EXEEXT)'; \
+	b='test-fwrite'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getaddrinfo.log: test-getaddrinfo$(EXEEXT)
+	@p='test-getaddrinfo$(EXEEXT)'; \
+	b='test-getaddrinfo'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getcwd-lgpl.log: test-getcwd-lgpl$(EXEEXT)
+	@p='test-getcwd-lgpl$(EXEEXT)'; \
+	b='test-getcwd-lgpl'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getdelim.log: test-getdelim$(EXEEXT)
+	@p='test-getdelim$(EXEEXT)'; \
+	b='test-getdelim'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getdtablesize.log: test-getdtablesize$(EXEEXT)
+	@p='test-getdtablesize$(EXEEXT)'; \
+	b='test-getdtablesize'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getline.log: test-getline$(EXEEXT)
+	@p='test-getline$(EXEEXT)'; \
+	b='test-getline'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getpeername.log: test-getpeername$(EXEEXT)
+	@p='test-getpeername$(EXEEXT)'; \
+	b='test-getpeername'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-getprogname.log: test-getprogname$(EXEEXT)
+	@p='test-getprogname$(EXEEXT)'; \
+	b='test-getprogname'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-gettimeofday.log: test-gettimeofday$(EXEEXT)
+	@p='test-gettimeofday$(EXEEXT)'; \
+	b='test-gettimeofday'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-hash.log: test-hash$(EXEEXT)
+	@p='test-hash$(EXEEXT)'; \
+	b='test-hash'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ignore-value.log: test-ignore-value$(EXEEXT)
+	@p='test-ignore-value$(EXEEXT)'; \
+	b='test-ignore-value'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-inet_ntop.log: test-inet_ntop$(EXEEXT)
+	@p='test-inet_ntop$(EXEEXT)'; \
+	b='test-inet_ntop'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-inet_pton.log: test-inet_pton$(EXEEXT)
+	@p='test-inet_pton$(EXEEXT)'; \
+	b='test-inet_pton'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-intprops.log: test-intprops$(EXEEXT)
+	@p='test-intprops$(EXEEXT)'; \
+	b='test-intprops'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-inttostr.log: test-inttostr$(EXEEXT)
+	@p='test-inttostr$(EXEEXT)'; \
+	b='test-inttostr'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-inttypes.log: test-inttypes$(EXEEXT)
+	@p='test-inttypes$(EXEEXT)'; \
+	b='test-inttypes'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-ioctl.log: test-ioctl$(EXEEXT)
+	@p='test-ioctl$(EXEEXT)'; \
+	b='test-ioctl'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-isblank.log: test-isblank$(EXEEXT)
+	@p='test-isblank$(EXEEXT)'; \
+	b='test-isblank'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-langinfo.log: test-langinfo$(EXEEXT)
+	@p='test-langinfo$(EXEEXT)'; \
+	b='test-langinfo'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-limits-h.log: test-limits-h$(EXEEXT)
+	@p='test-limits-h$(EXEEXT)'; \
+	b='test-limits-h'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-linked_list.log: test-linked_list$(EXEEXT)
+	@p='test-linked_list$(EXEEXT)'; \
+	b='test-linked_list'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-listen.log: test-listen$(EXEEXT)
+	@p='test-listen$(EXEEXT)'; \
+	b='test-listen'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-locale.log: test-locale$(EXEEXT)
+	@p='test-locale$(EXEEXT)'; \
+	b='test-locale'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-localename.log: test-localename$(EXEEXT)
+	@p='test-localename$(EXEEXT)'; \
+	b='test-localename'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-rwlock1.log: test-rwlock1$(EXEEXT)
+	@p='test-rwlock1$(EXEEXT)'; \
+	b='test-rwlock1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-lock.log: test-lock$(EXEEXT)
+	@p='test-lock$(EXEEXT)'; \
+	b='test-lock'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-once1.log: test-once1$(EXEEXT)
+	@p='test-once1$(EXEEXT)'; \
+	b='test-once1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-once2.log: test-once2$(EXEEXT)
+	@p='test-once2$(EXEEXT)'; \
+	b='test-once2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-lseek.sh.log: test-lseek.sh
+	@p='test-lseek.sh'; \
+	b='test-lseek.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-lstat.log: test-lstat$(EXEEXT)
+	@p='test-lstat$(EXEEXT)'; \
+	b='test-lstat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-malloc-gnu.log: test-malloc-gnu$(EXEEXT)
+	@p='test-malloc-gnu$(EXEEXT)'; \
+	b='test-malloc-gnu'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-malloca.log: test-malloca$(EXEEXT)
+	@p='test-malloca$(EXEEXT)'; \
+	b='test-malloca'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-memchr.log: test-memchr$(EXEEXT)
+	@p='test-memchr$(EXEEXT)'; \
+	b='test-memchr'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-nanosleep.log: test-nanosleep$(EXEEXT)
+	@p='test-nanosleep$(EXEEXT)'; \
+	b='test-nanosleep'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-netdb.log: test-netdb$(EXEEXT)
+	@p='test-netdb$(EXEEXT)'; \
+	b='test-netdb'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-netinet_in.log: test-netinet_in$(EXEEXT)
+	@p='test-netinet_in$(EXEEXT)'; \
+	b='test-netinet_in'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-nstrftime.log: test-nstrftime$(EXEEXT)
+	@p='test-nstrftime$(EXEEXT)'; \
+	b='test-nstrftime'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-open.log: test-open$(EXEEXT)
+	@p='test-open$(EXEEXT)'; \
+	b='test-open'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-parse-datetime.log: test-parse-datetime$(EXEEXT)
+	@p='test-parse-datetime$(EXEEXT)'; \
+	b='test-parse-datetime'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pathmax.log: test-pathmax$(EXEEXT)
+	@p='test-pathmax$(EXEEXT)'; \
+	b='test-pathmax'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-perror.sh.log: test-perror.sh
+	@p='test-perror.sh'; \
+	b='test-perror.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-perror2.log: test-perror2$(EXEEXT)
+	@p='test-perror2$(EXEEXT)'; \
+	b='test-perror2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pipe.log: test-pipe$(EXEEXT)
+	@p='test-pipe$(EXEEXT)'; \
+	b='test-pipe'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pthread.log: test-pthread$(EXEEXT)
+	@p='test-pthread$(EXEEXT)'; \
+	b='test-pthread'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pthread-thread.log: test-pthread-thread$(EXEEXT)
+	@p='test-pthread-thread$(EXEEXT)'; \
+	b='test-pthread-thread'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pthread_sigmask1.log: test-pthread_sigmask1$(EXEEXT)
+	@p='test-pthread_sigmask1$(EXEEXT)'; \
+	b='test-pthread_sigmask1'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-pthread_sigmask2.log: test-pthread_sigmask2$(EXEEXT)
+	@p='test-pthread_sigmask2$(EXEEXT)'; \
+	b='test-pthread_sigmask2'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-raise.log: test-raise$(EXEEXT)
+	@p='test-raise$(EXEEXT)'; \
+	b='test-raise'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-read-file.log: test-read-file$(EXEEXT)
+	@p='test-read-file$(EXEEXT)'; \
+	b='test-read-file'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-realloc-gnu.log: test-realloc-gnu$(EXEEXT)
+	@p='test-realloc-gnu$(EXEEXT)'; \
+	b='test-realloc-gnu'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-reallocarray.log: test-reallocarray$(EXEEXT)
+	@p='test-reallocarray$(EXEEXT)'; \
+	b='test-reallocarray'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-recv.log: test-recv$(EXEEXT)
+	@p='test-recv$(EXEEXT)'; \
+	b='test-recv'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-recvfrom.log: test-recvfrom$(EXEEXT)
+	@p='test-recvfrom$(EXEEXT)'; \
+	b='test-recvfrom'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sched.log: test-sched$(EXEEXT)
+	@p='test-sched$(EXEEXT)'; \
+	b='test-sched'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-select.log: test-select$(EXEEXT)
+	@p='test-select$(EXEEXT)'; \
+	b='test-select'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-select-in.sh.log: test-select-in.sh
+	@p='test-select-in.sh'; \
+	b='test-select-in.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-select-out.sh.log: test-select-out.sh
+	@p='test-select-out.sh'; \
+	b='test-select-out.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-send.log: test-send$(EXEEXT)
+	@p='test-send$(EXEEXT)'; \
+	b='test-send'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sendto.log: test-sendto$(EXEEXT)
+	@p='test-sendto$(EXEEXT)'; \
+	b='test-sendto'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setenv.log: test-setenv$(EXEEXT)
+	@p='test-setenv$(EXEEXT)'; \
+	b='test-setenv'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale_null.log: test-setlocale_null$(EXEEXT)
+	@p='test-setlocale_null$(EXEEXT)'; \
+	b='test-setlocale_null'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale_null-mt-one.log: test-setlocale_null-mt-one$(EXEEXT)
+	@p='test-setlocale_null-mt-one$(EXEEXT)'; \
+	b='test-setlocale_null-mt-one'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale_null-mt-all.log: test-setlocale_null-mt-all$(EXEEXT)
+	@p='test-setlocale_null-mt-all$(EXEEXT)'; \
+	b='test-setlocale_null-mt-all'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale1.sh.log: test-setlocale1.sh
+	@p='test-setlocale1.sh'; \
+	b='test-setlocale1.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setlocale2.sh.log: test-setlocale2.sh
+	@p='test-setlocale2.sh'; \
+	b='test-setlocale2.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-setsockopt.log: test-setsockopt$(EXEEXT)
+	@p='test-setsockopt$(EXEEXT)'; \
+	b='test-setsockopt'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-shutdown.log: test-shutdown$(EXEEXT)
+	@p='test-shutdown$(EXEEXT)'; \
+	b='test-shutdown'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sigaction.log: test-sigaction$(EXEEXT)
+	@p='test-sigaction$(EXEEXT)'; \
+	b='test-sigaction'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-signal-h.log: test-signal-h$(EXEEXT)
+	@p='test-signal-h$(EXEEXT)'; \
+	b='test-signal-h'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sigprocmask.log: test-sigprocmask$(EXEEXT)
+	@p='test-sigprocmask$(EXEEXT)'; \
+	b='test-sigprocmask'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sleep.log: test-sleep$(EXEEXT)
+	@p='test-sleep$(EXEEXT)'; \
+	b='test-sleep'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-snprintf.log: test-snprintf$(EXEEXT)
+	@p='test-snprintf$(EXEEXT)'; \
+	b='test-snprintf'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sockets.log: test-sockets$(EXEEXT)
+	@p='test-sockets$(EXEEXT)'; \
+	b='test-sockets'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stat.log: test-stat$(EXEEXT)
+	@p='test-stat$(EXEEXT)'; \
+	b='test-stat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stat-time.log: test-stat-time$(EXEEXT)
+	@p='test-stat-time$(EXEEXT)'; \
+	b='test-stat-time'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdalign.log: test-stdalign$(EXEEXT)
+	@p='test-stdalign$(EXEEXT)'; \
+	b='test-stdalign'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdbool.log: test-stdbool$(EXEEXT)
+	@p='test-stdbool$(EXEEXT)'; \
+	b='test-stdbool'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stddef.log: test-stddef$(EXEEXT)
+	@p='test-stddef$(EXEEXT)'; \
+	b='test-stddef'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdint.log: test-stdint$(EXEEXT)
+	@p='test-stdint$(EXEEXT)'; \
+	b='test-stdint'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdio.log: test-stdio$(EXEEXT)
+	@p='test-stdio$(EXEEXT)'; \
+	b='test-stdio'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-stdlib.log: test-stdlib$(EXEEXT)
+	@p='test-stdlib$(EXEEXT)'; \
+	b='test-stdlib'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strerror.log: test-strerror$(EXEEXT)
+	@p='test-strerror$(EXEEXT)'; \
+	b='test-strerror'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strerror_r.log: test-strerror_r$(EXEEXT)
+	@p='test-strerror_r$(EXEEXT)'; \
+	b='test-strerror_r'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-string.log: test-string$(EXEEXT)
+	@p='test-string$(EXEEXT)'; \
+	b='test-string'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strings.log: test-strings$(EXEEXT)
+	@p='test-strings$(EXEEXT)'; \
+	b='test-strings'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strnlen.log: test-strnlen$(EXEEXT)
+	@p='test-strnlen$(EXEEXT)'; \
+	b='test-strnlen'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strtoll.log: test-strtoll$(EXEEXT)
+	@p='test-strtoll$(EXEEXT)'; \
+	b='test-strtoll'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-strverscmp.log: test-strverscmp$(EXEEXT)
+	@p='test-strverscmp$(EXEEXT)'; \
+	b='test-strverscmp'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-symlink.log: test-symlink$(EXEEXT)
+	@p='test-symlink$(EXEEXT)'; \
+	b='test-symlink'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_ioctl.log: test-sys_ioctl$(EXEEXT)
+	@p='test-sys_ioctl$(EXEEXT)'; \
+	b='test-sys_ioctl'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_select.log: test-sys_select$(EXEEXT)
+	@p='test-sys_select$(EXEEXT)'; \
+	b='test-sys_select'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_socket.log: test-sys_socket$(EXEEXT)
+	@p='test-sys_socket$(EXEEXT)'; \
+	b='test-sys_socket'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_stat.log: test-sys_stat$(EXEEXT)
+	@p='test-sys_stat$(EXEEXT)'; \
+	b='test-sys_stat'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_time.log: test-sys_time$(EXEEXT)
+	@p='test-sys_time$(EXEEXT)'; \
+	b='test-sys_time'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_types.log: test-sys_types$(EXEEXT)
+	@p='test-sys_types$(EXEEXT)'; \
+	b='test-sys_types'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-sys_uio.log: test-sys_uio$(EXEEXT)
+	@p='test-sys_uio$(EXEEXT)'; \
+	b='test-sys_uio'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-init.sh.log: test-init.sh
+	@p='test-init.sh'; \
+	b='test-init.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-thread_self.log: test-thread_self$(EXEEXT)
+	@p='test-thread_self$(EXEEXT)'; \
+	b='test-thread_self'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-thread_create.log: test-thread_create$(EXEEXT)
+	@p='test-thread_create$(EXEEXT)'; \
+	b='test-thread_create'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
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+	@p='test-time$(EXEEXT)'; \
+	b='test-time'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-timespec.log: test-timespec$(EXEEXT)
+	@p='test-timespec$(EXEEXT)'; \
+	b='test-timespec'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-unistd.log: test-unistd$(EXEEXT)
+	@p='test-unistd$(EXEEXT)'; \
+	b='test-unistd'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-unsetenv.log: test-unsetenv$(EXEEXT)
+	@p='test-unsetenv$(EXEEXT)'; \
+	b='test-unsetenv'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-usleep.log: test-usleep$(EXEEXT)
+	@p='test-usleep$(EXEEXT)'; \
+	b='test-usleep'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
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+	@p='test-vasnprintf$(EXEEXT)'; \
+	b='test-vasnprintf'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-vasprintf.log: test-vasprintf$(EXEEXT)
+	@p='test-vasprintf$(EXEEXT)'; \
+	b='test-vasprintf'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
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+	b='test-verify'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
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+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	b='test-vsnprintf'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	b='test-wchar'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+test-xalloc-die.sh.log: test-xalloc-die.sh
+	@p='test-xalloc-die.sh'; \
+	b='test-xalloc-die.sh'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
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+	    || exit 1; \
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
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+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
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+	-rm -f ./$(DEPDIR)/binary-io.Po
+	-rm -f ./$(DEPDIR)/dtotimespec.Po
+	-rm -f ./$(DEPDIR)/fdopen.Po
+	-rm -f ./$(DEPDIR)/ftruncate.Po
+	-rm -f ./$(DEPDIR)/getcwd-lgpl.Po
+	-rm -f ./$(DEPDIR)/getpagesize.Po
+	-rm -f ./$(DEPDIR)/gl_array_list.Po
+	-rm -f ./$(DEPDIR)/hash-pjw.Po
+	-rm -f ./$(DEPDIR)/imaxtostr.Po
+	-rm -f ./$(DEPDIR)/inttostr.Po
+	-rm -f ./$(DEPDIR)/ioctl.Po
+	-rm -f ./$(DEPDIR)/isblank.Po
+	-rm -f ./$(DEPDIR)/localename-table.Po
+	-rm -f ./$(DEPDIR)/localename.Po
+	-rm -f ./$(DEPDIR)/lstat.Po
+	-rm -f ./$(DEPDIR)/nanosleep.Po
+	-rm -f ./$(DEPDIR)/offtostr.Po
+	-rm -f ./$(DEPDIR)/perror.Po
+	-rm -f ./$(DEPDIR)/pipe.Po
+	-rm -f ./$(DEPDIR)/pthread-thread.Po
+	-rm -f ./$(DEPDIR)/pthread_sigmask.Po
+	-rm -f ./$(DEPDIR)/putenv.Po
+	-rm -f ./$(DEPDIR)/raise.Po
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+	-rm -f ./$(DEPDIR)/setlocale-lock.Po
+	-rm -f ./$(DEPDIR)/setlocale.Po
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+	-rm -f ./$(DEPDIR)/sig-handler.Po
+	-rm -f ./$(DEPDIR)/sigaction.Po
+	-rm -f ./$(DEPDIR)/sigprocmask.Po
+	-rm -f ./$(DEPDIR)/sleep.Po
+	-rm -f ./$(DEPDIR)/strerror_r.Po
+	-rm -f ./$(DEPDIR)/strtol.Po
+	-rm -f ./$(DEPDIR)/strtoll.Po
+	-rm -f ./$(DEPDIR)/symlink.Po
+	-rm -f ./$(DEPDIR)/test-accept.Po
+	-rm -f ./$(DEPDIR)/test-alloca-opt.Po
+	-rm -f ./$(DEPDIR)/test-arpa_inet.Po
+	-rm -f ./$(DEPDIR)/test-array_list.Po
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+	-rm -f ./$(DEPDIR)/test-bitrotate.Po
+	-rm -f ./$(DEPDIR)/test-byteswap.Po
+	-rm -f ./$(DEPDIR)/test-c-ctype.Po
+	-rm -f ./$(DEPDIR)/test-c-strcasecmp.Po
+	-rm -f ./$(DEPDIR)/test-c-strncasecmp.Po
+	-rm -f ./$(DEPDIR)/test-calloc-gnu.Po
+	-rm -f ./$(DEPDIR)/test-cloexec.Po
+	-rm -f ./$(DEPDIR)/test-close.Po
+	-rm -f ./$(DEPDIR)/test-connect.Po
+	-rm -f ./$(DEPDIR)/test-ctype.Po
+	-rm -f ./$(DEPDIR)/test-dup2.Po
+	-rm -f ./$(DEPDIR)/test-environ.Po
+	-rm -f ./$(DEPDIR)/test-errno.Po
+	-rm -f ./$(DEPDIR)/test-explicit_bzero.Po
+	-rm -f ./$(DEPDIR)/test-fcntl-h.Po
+	-rm -f ./$(DEPDIR)/test-fcntl.Po
+	-rm -f ./$(DEPDIR)/test-fdopen.Po
+	-rm -f ./$(DEPDIR)/test-fgetc.Po
+	-rm -f ./$(DEPDIR)/test-float.Po
+	-rm -f ./$(DEPDIR)/test-fopen-gnu.Po
+	-rm -f ./$(DEPDIR)/test-fopen.Po
+	-rm -f ./$(DEPDIR)/test-fpending.Po
+	-rm -f ./$(DEPDIR)/test-fputc.Po
+	-rm -f ./$(DEPDIR)/test-fread.Po
+	-rm -f ./$(DEPDIR)/test-free.Po
+	-rm -f ./$(DEPDIR)/test-fseek.Po
+	-rm -f ./$(DEPDIR)/test-fseeko.Po
+	-rm -f ./$(DEPDIR)/test-fseeko3.Po
+	-rm -f ./$(DEPDIR)/test-fseeko4.Po
+	-rm -f ./$(DEPDIR)/test-fstat.Po
+	-rm -f ./$(DEPDIR)/test-ftell.Po
+	-rm -f ./$(DEPDIR)/test-ftell3.Po
+	-rm -f ./$(DEPDIR)/test-ftello.Po
+	-rm -f ./$(DEPDIR)/test-ftello3.Po
+	-rm -f ./$(DEPDIR)/test-ftello4.Po
+	-rm -f ./$(DEPDIR)/test-ftruncate.Po
+	-rm -f ./$(DEPDIR)/test-func.Po
+	-rm -f ./$(DEPDIR)/test-fwrite.Po
+	-rm -f ./$(DEPDIR)/test-getaddrinfo.Po
+	-rm -f ./$(DEPDIR)/test-getcwd-lgpl.Po
+	-rm -f ./$(DEPDIR)/test-getdelim.Po
+	-rm -f ./$(DEPDIR)/test-getdtablesize.Po
+	-rm -f ./$(DEPDIR)/test-getline.Po
+	-rm -f ./$(DEPDIR)/test-getpeername.Po
+	-rm -f ./$(DEPDIR)/test-getprogname.Po
+	-rm -f ./$(DEPDIR)/test-gettimeofday.Po
+	-rm -f ./$(DEPDIR)/test-hash.Po
+	-rm -f ./$(DEPDIR)/test-ignore-value.Po
+	-rm -f ./$(DEPDIR)/test-inet_ntop.Po
+	-rm -f ./$(DEPDIR)/test-inet_pton.Po
+	-rm -f ./$(DEPDIR)/test-intprops.Po
+	-rm -f ./$(DEPDIR)/test-inttostr.Po
+	-rm -f ./$(DEPDIR)/test-inttypes.Po
+	-rm -f ./$(DEPDIR)/test-ioctl.Po
+	-rm -f ./$(DEPDIR)/test-isblank.Po
+	-rm -f ./$(DEPDIR)/test-langinfo.Po
+	-rm -f ./$(DEPDIR)/test-limits-h.Po
+	-rm -f ./$(DEPDIR)/test-linked_list.Po
+	-rm -f ./$(DEPDIR)/test-listen.Po
+	-rm -f ./$(DEPDIR)/test-locale.Po
+	-rm -f ./$(DEPDIR)/test-localename.Po
+	-rm -f ./$(DEPDIR)/test-lock.Po
+	-rm -f ./$(DEPDIR)/test-lseek.Po
+	-rm -f ./$(DEPDIR)/test-lstat.Po
+	-rm -f ./$(DEPDIR)/test-malloc-gnu.Po
+	-rm -f ./$(DEPDIR)/test-malloca.Po
+	-rm -f ./$(DEPDIR)/test-memchr.Po
+	-rm -f ./$(DEPDIR)/test-nanosleep.Po
+	-rm -f ./$(DEPDIR)/test-netdb.Po
+	-rm -f ./$(DEPDIR)/test-netinet_in.Po
+	-rm -f ./$(DEPDIR)/test-nstrftime.Po
+	-rm -f ./$(DEPDIR)/test-once.Po
+	-rm -f ./$(DEPDIR)/test-open.Po
+	-rm -f ./$(DEPDIR)/test-parse-datetime.Po
+	-rm -f ./$(DEPDIR)/test-pathmax.Po
+	-rm -f ./$(DEPDIR)/test-perror.Po
+	-rm -f ./$(DEPDIR)/test-perror2.Po
+	-rm -f ./$(DEPDIR)/test-pipe.Po
+	-rm -f ./$(DEPDIR)/test-pthread-thread.Po
+	-rm -f ./$(DEPDIR)/test-pthread.Po
+	-rm -f ./$(DEPDIR)/test-pthread_sigmask1.Po
+	-rm -f ./$(DEPDIR)/test-pthread_sigmask2.Po
+	-rm -f ./$(DEPDIR)/test-raise.Po
+	-rm -f ./$(DEPDIR)/test-read-file.Po
+	-rm -f ./$(DEPDIR)/test-realloc-gnu.Po
+	-rm -f ./$(DEPDIR)/test-reallocarray.Po
+	-rm -f ./$(DEPDIR)/test-recv.Po
+	-rm -f ./$(DEPDIR)/test-recvfrom.Po
+	-rm -f ./$(DEPDIR)/test-rwlock1.Po
+	-rm -f ./$(DEPDIR)/test-sched.Po
+	-rm -f ./$(DEPDIR)/test-select-fd.Po
+	-rm -f ./$(DEPDIR)/test-select-stdin.Po
+	-rm -f ./$(DEPDIR)/test-select.Po
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+	-rm -f ./$(DEPDIR)/test-setenv.Po
+	-rm -f ./$(DEPDIR)/test-setlocale1.Po
+	-rm -f ./$(DEPDIR)/test-setlocale2.Po
+	-rm -f ./$(DEPDIR)/test-setlocale_null-mt-all.Po
+	-rm -f ./$(DEPDIR)/test-setlocale_null-mt-one.Po
+	-rm -f ./$(DEPDIR)/test-setlocale_null.Po
+	-rm -f ./$(DEPDIR)/test-setsockopt.Po
+	-rm -f ./$(DEPDIR)/test-shutdown.Po
+	-rm -f ./$(DEPDIR)/test-sigaction.Po
+	-rm -f ./$(DEPDIR)/test-signal-h.Po
+	-rm -f ./$(DEPDIR)/test-sigprocmask.Po
+	-rm -f ./$(DEPDIR)/test-sleep.Po
+	-rm -f ./$(DEPDIR)/test-snprintf.Po
+	-rm -f ./$(DEPDIR)/test-sockets.Po
+	-rm -f ./$(DEPDIR)/test-stat-time.Po
+	-rm -f ./$(DEPDIR)/test-stat.Po
+	-rm -f ./$(DEPDIR)/test-stdalign.Po
+	-rm -f ./$(DEPDIR)/test-stdbool.Po
+	-rm -f ./$(DEPDIR)/test-stddef.Po
+	-rm -f ./$(DEPDIR)/test-stdint.Po
+	-rm -f ./$(DEPDIR)/test-stdio.Po
+	-rm -f ./$(DEPDIR)/test-stdlib.Po
+	-rm -f ./$(DEPDIR)/test-strerror.Po
+	-rm -f ./$(DEPDIR)/test-strerror_r.Po
+	-rm -f ./$(DEPDIR)/test-string.Po
+	-rm -f ./$(DEPDIR)/test-strings.Po
+	-rm -f ./$(DEPDIR)/test-strnlen.Po
+	-rm -f ./$(DEPDIR)/test-strtoll.Po
+	-rm -f ./$(DEPDIR)/test-strverscmp.Po
+	-rm -f ./$(DEPDIR)/test-symlink.Po
+	-rm -f ./$(DEPDIR)/test-sys_ioctl.Po
+	-rm -f ./$(DEPDIR)/test-sys_select.Po
+	-rm -f ./$(DEPDIR)/test-sys_socket.Po
+	-rm -f ./$(DEPDIR)/test-sys_stat.Po
+	-rm -f ./$(DEPDIR)/test-sys_time.Po
+	-rm -f ./$(DEPDIR)/test-sys_types.Po
+	-rm -f ./$(DEPDIR)/test-sys_uio.Po
+	-rm -f ./$(DEPDIR)/test-thread_create.Po
+	-rm -f ./$(DEPDIR)/test-thread_self.Po
+	-rm -f ./$(DEPDIR)/test-time.Po
+	-rm -f ./$(DEPDIR)/test-timespec.Po
+	-rm -f ./$(DEPDIR)/test-unistd.Po
+	-rm -f ./$(DEPDIR)/test-unsetenv.Po
+	-rm -f ./$(DEPDIR)/test-usleep.Po
+	-rm -f ./$(DEPDIR)/test-vasnprintf.Po
+	-rm -f ./$(DEPDIR)/test-vasprintf.Po
+	-rm -f ./$(DEPDIR)/test-verify-try.Po
+	-rm -f ./$(DEPDIR)/test-verify.Po
+	-rm -f ./$(DEPDIR)/test-vsnprintf.Po
+	-rm -f ./$(DEPDIR)/test-wchar.Po
+	-rm -f ./$(DEPDIR)/test-xalloc-die.Po
+	-rm -f ./$(DEPDIR)/timespec-add.Po
+	-rm -f ./$(DEPDIR)/timespec-sub.Po
+	-rm -f ./$(DEPDIR)/uinttostr.Po
+	-rm -f ./$(DEPDIR)/umaxtostr.Po
+	-rm -f ./$(DEPDIR)/usleep.Po
+	-rm -f ./$(DEPDIR)/vma-iter.Po
+	-rm -f ./$(DEPDIR)/windows-thread.Po
+	-rm -f ./$(DEPDIR)/windows-tls.Po
+	-rm -f glthread/$(DEPDIR)/thread.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-recursive
+
+dvi-am:
+
+html: html-recursive
+
+html-am:
+
+info: info-recursive
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-recursive
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-recursive
+
+install-html-am:
+
+install-info: install-info-recursive
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-recursive
+
+install-pdf-am:
+
+install-ps: install-ps-recursive
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-recursive
+		-rm -f ./$(DEPDIR)/anytostr.Po
+	-rm -f ./$(DEPDIR)/atoll.Po
+	-rm -f ./$(DEPDIR)/binary-io.Po
+	-rm -f ./$(DEPDIR)/dtotimespec.Po
+	-rm -f ./$(DEPDIR)/fdopen.Po
+	-rm -f ./$(DEPDIR)/ftruncate.Po
+	-rm -f ./$(DEPDIR)/getcwd-lgpl.Po
+	-rm -f ./$(DEPDIR)/getpagesize.Po
+	-rm -f ./$(DEPDIR)/gl_array_list.Po
+	-rm -f ./$(DEPDIR)/hash-pjw.Po
+	-rm -f ./$(DEPDIR)/imaxtostr.Po
+	-rm -f ./$(DEPDIR)/inttostr.Po
+	-rm -f ./$(DEPDIR)/ioctl.Po
+	-rm -f ./$(DEPDIR)/isblank.Po
+	-rm -f ./$(DEPDIR)/localename-table.Po
+	-rm -f ./$(DEPDIR)/localename.Po
+	-rm -f ./$(DEPDIR)/lstat.Po
+	-rm -f ./$(DEPDIR)/nanosleep.Po
+	-rm -f ./$(DEPDIR)/offtostr.Po
+	-rm -f ./$(DEPDIR)/perror.Po
+	-rm -f ./$(DEPDIR)/pipe.Po
+	-rm -f ./$(DEPDIR)/pthread-thread.Po
+	-rm -f ./$(DEPDIR)/pthread_sigmask.Po
+	-rm -f ./$(DEPDIR)/putenv.Po
+	-rm -f ./$(DEPDIR)/raise.Po
+	-rm -f ./$(DEPDIR)/sched_yield.Po
+	-rm -f ./$(DEPDIR)/setlocale-lock.Po
+	-rm -f ./$(DEPDIR)/setlocale.Po
+	-rm -f ./$(DEPDIR)/setlocale_null.Po
+	-rm -f ./$(DEPDIR)/sig-handler.Po
+	-rm -f ./$(DEPDIR)/sigaction.Po
+	-rm -f ./$(DEPDIR)/sigprocmask.Po
+	-rm -f ./$(DEPDIR)/sleep.Po
+	-rm -f ./$(DEPDIR)/strerror_r.Po
+	-rm -f ./$(DEPDIR)/strtol.Po
+	-rm -f ./$(DEPDIR)/strtoll.Po
+	-rm -f ./$(DEPDIR)/symlink.Po
+	-rm -f ./$(DEPDIR)/test-accept.Po
+	-rm -f ./$(DEPDIR)/test-alloca-opt.Po
+	-rm -f ./$(DEPDIR)/test-arpa_inet.Po
+	-rm -f ./$(DEPDIR)/test-array_list.Po
+	-rm -f ./$(DEPDIR)/test-binary-io.Po
+	-rm -f ./$(DEPDIR)/test-bind.Po
+	-rm -f ./$(DEPDIR)/test-bitrotate.Po
+	-rm -f ./$(DEPDIR)/test-byteswap.Po
+	-rm -f ./$(DEPDIR)/test-c-ctype.Po
+	-rm -f ./$(DEPDIR)/test-c-strcasecmp.Po
+	-rm -f ./$(DEPDIR)/test-c-strncasecmp.Po
+	-rm -f ./$(DEPDIR)/test-calloc-gnu.Po
+	-rm -f ./$(DEPDIR)/test-cloexec.Po
+	-rm -f ./$(DEPDIR)/test-close.Po
+	-rm -f ./$(DEPDIR)/test-connect.Po
+	-rm -f ./$(DEPDIR)/test-ctype.Po
+	-rm -f ./$(DEPDIR)/test-dup2.Po
+	-rm -f ./$(DEPDIR)/test-environ.Po
+	-rm -f ./$(DEPDIR)/test-errno.Po
+	-rm -f ./$(DEPDIR)/test-explicit_bzero.Po
+	-rm -f ./$(DEPDIR)/test-fcntl-h.Po
+	-rm -f ./$(DEPDIR)/test-fcntl.Po
+	-rm -f ./$(DEPDIR)/test-fdopen.Po
+	-rm -f ./$(DEPDIR)/test-fgetc.Po
+	-rm -f ./$(DEPDIR)/test-float.Po
+	-rm -f ./$(DEPDIR)/test-fopen-gnu.Po
+	-rm -f ./$(DEPDIR)/test-fopen.Po
+	-rm -f ./$(DEPDIR)/test-fpending.Po
+	-rm -f ./$(DEPDIR)/test-fputc.Po
+	-rm -f ./$(DEPDIR)/test-fread.Po
+	-rm -f ./$(DEPDIR)/test-free.Po
+	-rm -f ./$(DEPDIR)/test-fseek.Po
+	-rm -f ./$(DEPDIR)/test-fseeko.Po
+	-rm -f ./$(DEPDIR)/test-fseeko3.Po
+	-rm -f ./$(DEPDIR)/test-fseeko4.Po
+	-rm -f ./$(DEPDIR)/test-fstat.Po
+	-rm -f ./$(DEPDIR)/test-ftell.Po
+	-rm -f ./$(DEPDIR)/test-ftell3.Po
+	-rm -f ./$(DEPDIR)/test-ftello.Po
+	-rm -f ./$(DEPDIR)/test-ftello3.Po
+	-rm -f ./$(DEPDIR)/test-ftello4.Po
+	-rm -f ./$(DEPDIR)/test-ftruncate.Po
+	-rm -f ./$(DEPDIR)/test-func.Po
+	-rm -f ./$(DEPDIR)/test-fwrite.Po
+	-rm -f ./$(DEPDIR)/test-getaddrinfo.Po
+	-rm -f ./$(DEPDIR)/test-getcwd-lgpl.Po
+	-rm -f ./$(DEPDIR)/test-getdelim.Po
+	-rm -f ./$(DEPDIR)/test-getdtablesize.Po
+	-rm -f ./$(DEPDIR)/test-getline.Po
+	-rm -f ./$(DEPDIR)/test-getpeername.Po
+	-rm -f ./$(DEPDIR)/test-getprogname.Po
+	-rm -f ./$(DEPDIR)/test-gettimeofday.Po
+	-rm -f ./$(DEPDIR)/test-hash.Po
+	-rm -f ./$(DEPDIR)/test-ignore-value.Po
+	-rm -f ./$(DEPDIR)/test-inet_ntop.Po
+	-rm -f ./$(DEPDIR)/test-inet_pton.Po
+	-rm -f ./$(DEPDIR)/test-intprops.Po
+	-rm -f ./$(DEPDIR)/test-inttostr.Po
+	-rm -f ./$(DEPDIR)/test-inttypes.Po
+	-rm -f ./$(DEPDIR)/test-ioctl.Po
+	-rm -f ./$(DEPDIR)/test-isblank.Po
+	-rm -f ./$(DEPDIR)/test-langinfo.Po
+	-rm -f ./$(DEPDIR)/test-limits-h.Po
+	-rm -f ./$(DEPDIR)/test-linked_list.Po
+	-rm -f ./$(DEPDIR)/test-listen.Po
+	-rm -f ./$(DEPDIR)/test-locale.Po
+	-rm -f ./$(DEPDIR)/test-localename.Po
+	-rm -f ./$(DEPDIR)/test-lock.Po
+	-rm -f ./$(DEPDIR)/test-lseek.Po
+	-rm -f ./$(DEPDIR)/test-lstat.Po
+	-rm -f ./$(DEPDIR)/test-malloc-gnu.Po
+	-rm -f ./$(DEPDIR)/test-malloca.Po
+	-rm -f ./$(DEPDIR)/test-memchr.Po
+	-rm -f ./$(DEPDIR)/test-nanosleep.Po
+	-rm -f ./$(DEPDIR)/test-netdb.Po
+	-rm -f ./$(DEPDIR)/test-netinet_in.Po
+	-rm -f ./$(DEPDIR)/test-nstrftime.Po
+	-rm -f ./$(DEPDIR)/test-once.Po
+	-rm -f ./$(DEPDIR)/test-open.Po
+	-rm -f ./$(DEPDIR)/test-parse-datetime.Po
+	-rm -f ./$(DEPDIR)/test-pathmax.Po
+	-rm -f ./$(DEPDIR)/test-perror.Po
+	-rm -f ./$(DEPDIR)/test-perror2.Po
+	-rm -f ./$(DEPDIR)/test-pipe.Po
+	-rm -f ./$(DEPDIR)/test-pthread-thread.Po
+	-rm -f ./$(DEPDIR)/test-pthread.Po
+	-rm -f ./$(DEPDIR)/test-pthread_sigmask1.Po
+	-rm -f ./$(DEPDIR)/test-pthread_sigmask2.Po
+	-rm -f ./$(DEPDIR)/test-raise.Po
+	-rm -f ./$(DEPDIR)/test-read-file.Po
+	-rm -f ./$(DEPDIR)/test-realloc-gnu.Po
+	-rm -f ./$(DEPDIR)/test-reallocarray.Po
+	-rm -f ./$(DEPDIR)/test-recv.Po
+	-rm -f ./$(DEPDIR)/test-recvfrom.Po
+	-rm -f ./$(DEPDIR)/test-rwlock1.Po
+	-rm -f ./$(DEPDIR)/test-sched.Po
+	-rm -f ./$(DEPDIR)/test-select-fd.Po
+	-rm -f ./$(DEPDIR)/test-select-stdin.Po
+	-rm -f ./$(DEPDIR)/test-select.Po
+	-rm -f ./$(DEPDIR)/test-send.Po
+	-rm -f ./$(DEPDIR)/test-sendto.Po
+	-rm -f ./$(DEPDIR)/test-setenv.Po
+	-rm -f ./$(DEPDIR)/test-setlocale1.Po
+	-rm -f ./$(DEPDIR)/test-setlocale2.Po
+	-rm -f ./$(DEPDIR)/test-setlocale_null-mt-all.Po
+	-rm -f ./$(DEPDIR)/test-setlocale_null-mt-one.Po
+	-rm -f ./$(DEPDIR)/test-setlocale_null.Po
+	-rm -f ./$(DEPDIR)/test-setsockopt.Po
+	-rm -f ./$(DEPDIR)/test-shutdown.Po
+	-rm -f ./$(DEPDIR)/test-sigaction.Po
+	-rm -f ./$(DEPDIR)/test-signal-h.Po
+	-rm -f ./$(DEPDIR)/test-sigprocmask.Po
+	-rm -f ./$(DEPDIR)/test-sleep.Po
+	-rm -f ./$(DEPDIR)/test-snprintf.Po
+	-rm -f ./$(DEPDIR)/test-sockets.Po
+	-rm -f ./$(DEPDIR)/test-stat-time.Po
+	-rm -f ./$(DEPDIR)/test-stat.Po
+	-rm -f ./$(DEPDIR)/test-stdalign.Po
+	-rm -f ./$(DEPDIR)/test-stdbool.Po
+	-rm -f ./$(DEPDIR)/test-stddef.Po
+	-rm -f ./$(DEPDIR)/test-stdint.Po
+	-rm -f ./$(DEPDIR)/test-stdio.Po
+	-rm -f ./$(DEPDIR)/test-stdlib.Po
+	-rm -f ./$(DEPDIR)/test-strerror.Po
+	-rm -f ./$(DEPDIR)/test-strerror_r.Po
+	-rm -f ./$(DEPDIR)/test-string.Po
+	-rm -f ./$(DEPDIR)/test-strings.Po
+	-rm -f ./$(DEPDIR)/test-strnlen.Po
+	-rm -f ./$(DEPDIR)/test-strtoll.Po
+	-rm -f ./$(DEPDIR)/test-strverscmp.Po
+	-rm -f ./$(DEPDIR)/test-symlink.Po
+	-rm -f ./$(DEPDIR)/test-sys_ioctl.Po
+	-rm -f ./$(DEPDIR)/test-sys_select.Po
+	-rm -f ./$(DEPDIR)/test-sys_socket.Po
+	-rm -f ./$(DEPDIR)/test-sys_stat.Po
+	-rm -f ./$(DEPDIR)/test-sys_time.Po
+	-rm -f ./$(DEPDIR)/test-sys_types.Po
+	-rm -f ./$(DEPDIR)/test-sys_uio.Po
+	-rm -f ./$(DEPDIR)/test-thread_create.Po
+	-rm -f ./$(DEPDIR)/test-thread_self.Po
+	-rm -f ./$(DEPDIR)/test-time.Po
+	-rm -f ./$(DEPDIR)/test-timespec.Po
+	-rm -f ./$(DEPDIR)/test-unistd.Po
+	-rm -f ./$(DEPDIR)/test-unsetenv.Po
+	-rm -f ./$(DEPDIR)/test-usleep.Po
+	-rm -f ./$(DEPDIR)/test-vasnprintf.Po
+	-rm -f ./$(DEPDIR)/test-vasprintf.Po
+	-rm -f ./$(DEPDIR)/test-verify-try.Po
+	-rm -f ./$(DEPDIR)/test-verify.Po
+	-rm -f ./$(DEPDIR)/test-vsnprintf.Po
+	-rm -f ./$(DEPDIR)/test-wchar.Po
+	-rm -f ./$(DEPDIR)/test-xalloc-die.Po
+	-rm -f ./$(DEPDIR)/timespec-add.Po
+	-rm -f ./$(DEPDIR)/timespec-sub.Po
+	-rm -f ./$(DEPDIR)/uinttostr.Po
+	-rm -f ./$(DEPDIR)/umaxtostr.Po
+	-rm -f ./$(DEPDIR)/usleep.Po
+	-rm -f ./$(DEPDIR)/vma-iter.Po
+	-rm -f ./$(DEPDIR)/windows-thread.Po
+	-rm -f ./$(DEPDIR)/windows-tls.Po
+	-rm -f glthread/$(DEPDIR)/thread.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-recursive
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool mostlyclean-local
+
+pdf: pdf-recursive
+
+pdf-am:
+
+ps: ps-recursive
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: $(am__recursive_targets) all check check-am install install-am \
+	install-exec install-strip
+
+.PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am \
+	am--depfiles check check-TESTS check-am clean \
+	clean-checkLIBRARIES clean-checkPROGRAMS clean-generic \
+	clean-libtool clean-local clean-noinstLIBRARIES \
+	clean-noinstPROGRAMS cscopelist-am ctags ctags-am distclean \
+	distclean-compile distclean-generic distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	installdirs-am maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool mostlyclean-local pdf pdf-am ps ps-am \
+	recheck tags tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# We need the following in order to create <ctype.h> when the system
+# doesn't have one that works with the given compiler.
+ctype.h: ctype.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_CTYPE_H''@|$(NEXT_CTYPE_H)|g' \
+	      -e 's/@''GNULIB_ISBLANK''@/$(GL_GGL_GNULIB_ISBLANK)/g' \
+	      -e 's/@''HAVE_ISBLANK''@/$(HAVE_ISBLANK)/g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/ctype.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create an empty placeholder for
+# <langinfo.h> when the system doesn't have one.
+langinfo.h: langinfo.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''HAVE_LANGINFO_H''@|$(HAVE_LANGINFO_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LANGINFO_H''@|$(NEXT_LANGINFO_H)|g' \
+	      -e 's/@''GNULIB_NL_LANGINFO''@/$(GL_GGL_GNULIB_NL_LANGINFO)/g' \
+	      -e 's|@''HAVE_LANGINFO_CODESET''@|$(HAVE_LANGINFO_CODESET)|g' \
+	      -e 's|@''HAVE_LANGINFO_T_FMT_AMPM''@|$(HAVE_LANGINFO_T_FMT_AMPM)|g' \
+	      -e 's|@''HAVE_LANGINFO_ALTMON''@|$(HAVE_LANGINFO_ALTMON)|g' \
+	      -e 's|@''HAVE_LANGINFO_ERA''@|$(HAVE_LANGINFO_ERA)|g' \
+	      -e 's|@''HAVE_LANGINFO_YESEXPR''@|$(HAVE_LANGINFO_YESEXPR)|g' \
+	      -e 's|@''HAVE_NL_LANGINFO''@|$(HAVE_NL_LANGINFO)|g' \
+	      -e 's|@''REPLACE_NL_LANGINFO''@|$(REPLACE_NL_LANGINFO)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/langinfo.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <locale.h> when the system
+# doesn't have one that provides all definitions.
+locale.h: locale.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_LOCALE_H''@|$(NEXT_LOCALE_H)|g' \
+	      -e 's/@''GNULIB_LOCALECONV''@/$(GL_GGL_GNULIB_LOCALECONV)/g' \
+	      -e 's/@''GNULIB_SETLOCALE''@/$(GL_GGL_GNULIB_SETLOCALE)/g' \
+	      -e 's/@''GNULIB_SETLOCALE_NULL''@/$(GL_GGL_GNULIB_SETLOCALE_NULL)/g' \
+	      -e 's/@''GNULIB_DUPLOCALE''@/$(GL_GGL_GNULIB_DUPLOCALE)/g' \
+	      -e 's/@''GNULIB_LOCALENAME''@/$(GL_GGL_GNULIB_LOCALENAME)/g' \
+	      -e 's|@''HAVE_NEWLOCALE''@|$(HAVE_NEWLOCALE)|g' \
+	      -e 's|@''HAVE_DUPLOCALE''@|$(HAVE_DUPLOCALE)|g' \
+	      -e 's|@''HAVE_FREELOCALE''@|$(HAVE_FREELOCALE)|g' \
+	      -e 's|@''HAVE_XLOCALE_H''@|$(HAVE_XLOCALE_H)|g' \
+	      -e 's|@''REPLACE_LOCALECONV''@|$(REPLACE_LOCALECONV)|g' \
+	      -e 's|@''REPLACE_SETLOCALE''@|$(REPLACE_SETLOCALE)|g' \
+	      -e 's|@''REPLACE_NEWLOCALE''@|$(REPLACE_NEWLOCALE)|g' \
+	      -e 's|@''REPLACE_DUPLOCALE''@|$(REPLACE_DUPLOCALE)|g' \
+	      -e 's|@''REPLACE_FREELOCALE''@|$(REPLACE_FREELOCALE)|g' \
+	      -e 's|@''REPLACE_STRUCT_LCONV''@|$(REPLACE_STRUCT_LCONV)|g' \
+	      -e 's|@''LOCALENAME_ENHANCE_LOCALE_FUNCS''@|$(LOCALENAME_ENHANCE_LOCALE_FUNCS)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/locale.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <pthread.h> when the system
+# doesn't have one that works with the given compiler.
+pthread.h: pthread.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(_NORETURN_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''HAVE_PTHREAD_H''@|$(HAVE_PTHREAD_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_PTHREAD_H''@|$(NEXT_PTHREAD_H)|g' \
+	      -e 's/@''GNULIB_PTHREAD_THREAD''@/$(GL_GGL_GNULIB_PTHREAD_THREAD)/g' \
+	      -e 's/@''GNULIB_PTHREAD_ONCE''@/$(GL_GGL_GNULIB_PTHREAD_ONCE)/g' \
+	      -e 's/@''GNULIB_PTHREAD_MUTEX''@/$(GL_GGL_GNULIB_PTHREAD_MUTEX)/g' \
+	      -e 's/@''GNULIB_PTHREAD_RWLOCK''@/$(GL_GGL_GNULIB_PTHREAD_RWLOCK)/g' \
+	      -e 's/@''GNULIB_PTHREAD_COND''@/$(GL_GGL_GNULIB_PTHREAD_COND)/g' \
+	      -e 's/@''GNULIB_PTHREAD_TSS''@/$(GL_GGL_GNULIB_PTHREAD_TSS)/g' \
+	      -e 's/@''GNULIB_PTHREAD_SPIN''@/$(GL_GGL_GNULIB_PTHREAD_SPIN)/g' \
+	      -e 's/@''GNULIB_PTHREAD_MUTEX_TIMEDLOCK''@/$(GL_GGL_GNULIB_PTHREAD_MUTEX_TIMEDLOCK)/g' \
+	      -e 's|@''HAVE_PTHREAD_T''@|$(HAVE_PTHREAD_T)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPINLOCK_T''@|$(HAVE_PTHREAD_SPINLOCK_T)|g' \
+	      -e 's|@''HAVE_PTHREAD_CREATE_DETACHED''@|$(HAVE_PTHREAD_CREATE_DETACHED)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_RECURSIVE''@|$(HAVE_PTHREAD_MUTEX_RECURSIVE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_ROBUST''@|$(HAVE_PTHREAD_MUTEX_ROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_PROCESS_SHARED''@|$(HAVE_PTHREAD_PROCESS_SHARED)|g' \
+	      -e 's|@''HAVE_PTHREAD_CREATE''@|$(HAVE_PTHREAD_CREATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_INIT''@|$(HAVE_PTHREAD_ATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_GETDETACHSTATE''@|$(HAVE_PTHREAD_ATTR_GETDETACHSTATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_SETDETACHSTATE''@|$(HAVE_PTHREAD_ATTR_SETDETACHSTATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_ATTR_DESTROY''@|$(HAVE_PTHREAD_ATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_SELF''@|$(HAVE_PTHREAD_SELF)|g' \
+	      -e 's|@''HAVE_PTHREAD_EQUAL''@|$(HAVE_PTHREAD_EQUAL)|g' \
+	      -e 's|@''HAVE_PTHREAD_DETACH''@|$(HAVE_PTHREAD_DETACH)|g' \
+	      -e 's|@''HAVE_PTHREAD_JOIN''@|$(HAVE_PTHREAD_JOIN)|g' \
+	      -e 's|@''HAVE_PTHREAD_EXIT''@|$(HAVE_PTHREAD_EXIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_ONCE''@|$(HAVE_PTHREAD_ONCE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_INIT''@|$(HAVE_PTHREAD_MUTEX_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_INIT''@|$(HAVE_PTHREAD_MUTEXATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_GETTYPE''@|$(HAVE_PTHREAD_MUTEXATTR_GETTYPE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_SETTYPE''@|$(HAVE_PTHREAD_MUTEXATTR_SETTYPE)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_GETROBUST''@|$(HAVE_PTHREAD_MUTEXATTR_GETROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_SETROBUST''@|$(HAVE_PTHREAD_MUTEXATTR_SETROBUST)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEXATTR_DESTROY''@|$(HAVE_PTHREAD_MUTEXATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_LOCK''@|$(HAVE_PTHREAD_MUTEX_LOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_TRYLOCK''@|$(HAVE_PTHREAD_MUTEX_TRYLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_TIMEDLOCK''@|$(HAVE_PTHREAD_MUTEX_TIMEDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_UNLOCK''@|$(HAVE_PTHREAD_MUTEX_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_MUTEX_DESTROY''@|$(HAVE_PTHREAD_MUTEX_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_INIT''@|$(HAVE_PTHREAD_RWLOCK_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCKATTR_INIT''@|$(HAVE_PTHREAD_RWLOCKATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCKATTR_DESTROY''@|$(HAVE_PTHREAD_RWLOCKATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_RDLOCK''@|$(HAVE_PTHREAD_RWLOCK_RDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_WRLOCK''@|$(HAVE_PTHREAD_RWLOCK_WRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TRYRDLOCK''@|$(HAVE_PTHREAD_RWLOCK_TRYRDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TRYWRLOCK''@|$(HAVE_PTHREAD_RWLOCK_TRYWRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK''@|$(HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK''@|$(HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_UNLOCK''@|$(HAVE_PTHREAD_RWLOCK_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_RWLOCK_DESTROY''@|$(HAVE_PTHREAD_RWLOCK_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_INIT''@|$(HAVE_PTHREAD_COND_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_CONDATTR_INIT''@|$(HAVE_PTHREAD_CONDATTR_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_CONDATTR_DESTROY''@|$(HAVE_PTHREAD_CONDATTR_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_WAIT''@|$(HAVE_PTHREAD_COND_WAIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_TIMEDWAIT''@|$(HAVE_PTHREAD_COND_TIMEDWAIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_SIGNAL''@|$(HAVE_PTHREAD_COND_SIGNAL)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_BROADCAST''@|$(HAVE_PTHREAD_COND_BROADCAST)|g' \
+	      -e 's|@''HAVE_PTHREAD_COND_DESTROY''@|$(HAVE_PTHREAD_COND_DESTROY)|g' \
+	      -e 's|@''HAVE_PTHREAD_KEY_CREATE''@|$(HAVE_PTHREAD_KEY_CREATE)|g' \
+	      -e 's|@''HAVE_PTHREAD_SETSPECIFIC''@|$(HAVE_PTHREAD_SETSPECIFIC)|g' \
+	      -e 's|@''HAVE_PTHREAD_GETSPECIFIC''@|$(HAVE_PTHREAD_GETSPECIFIC)|g' \
+	      -e 's|@''HAVE_PTHREAD_KEY_DELETE''@|$(HAVE_PTHREAD_KEY_DELETE)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_INIT''@|$(HAVE_PTHREAD_SPIN_INIT)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_LOCK''@|$(HAVE_PTHREAD_SPIN_LOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_TRYLOCK''@|$(HAVE_PTHREAD_SPIN_TRYLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_UNLOCK''@|$(HAVE_PTHREAD_SPIN_UNLOCK)|g' \
+	      -e 's|@''HAVE_PTHREAD_SPIN_DESTROY''@|$(HAVE_PTHREAD_SPIN_DESTROY)|g' \
+	      < $(srcdir)/pthread.in.h | \
+	  sed -e 's|@''REPLACE_PTHREAD_CREATE''@|$(REPLACE_PTHREAD_CREATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_INIT''@|$(REPLACE_PTHREAD_ATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_GETDETACHSTATE''@|$(REPLACE_PTHREAD_ATTR_GETDETACHSTATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_SETDETACHSTATE''@|$(REPLACE_PTHREAD_ATTR_SETDETACHSTATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ATTR_DESTROY''@|$(REPLACE_PTHREAD_ATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SELF''@|$(REPLACE_PTHREAD_SELF)|g' \
+	      -e 's|@''REPLACE_PTHREAD_EQUAL''@|$(REPLACE_PTHREAD_EQUAL)|g' \
+	      -e 's|@''REPLACE_PTHREAD_DETACH''@|$(REPLACE_PTHREAD_DETACH)|g' \
+	      -e 's|@''REPLACE_PTHREAD_JOIN''@|$(REPLACE_PTHREAD_JOIN)|g' \
+	      -e 's|@''REPLACE_PTHREAD_EXIT''@|$(REPLACE_PTHREAD_EXIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_ONCE''@|$(REPLACE_PTHREAD_ONCE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_INIT''@|$(REPLACE_PTHREAD_MUTEX_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_INIT''@|$(REPLACE_PTHREAD_MUTEXATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_GETTYPE''@|$(REPLACE_PTHREAD_MUTEXATTR_GETTYPE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_SETTYPE''@|$(REPLACE_PTHREAD_MUTEXATTR_SETTYPE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_GETROBUST''@|$(REPLACE_PTHREAD_MUTEXATTR_GETROBUST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_SETROBUST''@|$(REPLACE_PTHREAD_MUTEXATTR_SETROBUST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEXATTR_DESTROY''@|$(REPLACE_PTHREAD_MUTEXATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_LOCK''@|$(REPLACE_PTHREAD_MUTEX_LOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_TRYLOCK''@|$(REPLACE_PTHREAD_MUTEX_TRYLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_TIMEDLOCK''@|$(REPLACE_PTHREAD_MUTEX_TIMEDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_UNLOCK''@|$(REPLACE_PTHREAD_MUTEX_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_MUTEX_DESTROY''@|$(REPLACE_PTHREAD_MUTEX_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_INIT''@|$(REPLACE_PTHREAD_RWLOCK_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCKATTR_INIT''@|$(REPLACE_PTHREAD_RWLOCKATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCKATTR_DESTROY''@|$(REPLACE_PTHREAD_RWLOCKATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_RDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_RDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_WRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_WRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TRYRDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TRYRDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TRYWRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TRYWRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK''@|$(REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_UNLOCK''@|$(REPLACE_PTHREAD_RWLOCK_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_RWLOCK_DESTROY''@|$(REPLACE_PTHREAD_RWLOCK_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_INIT''@|$(REPLACE_PTHREAD_COND_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_CONDATTR_INIT''@|$(REPLACE_PTHREAD_CONDATTR_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_CONDATTR_DESTROY''@|$(REPLACE_PTHREAD_CONDATTR_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_WAIT''@|$(REPLACE_PTHREAD_COND_WAIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_TIMEDWAIT''@|$(REPLACE_PTHREAD_COND_TIMEDWAIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_SIGNAL''@|$(REPLACE_PTHREAD_COND_SIGNAL)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_BROADCAST''@|$(REPLACE_PTHREAD_COND_BROADCAST)|g' \
+	      -e 's|@''REPLACE_PTHREAD_COND_DESTROY''@|$(REPLACE_PTHREAD_COND_DESTROY)|g' \
+	      -e 's|@''REPLACE_PTHREAD_KEY_CREATE''@|$(REPLACE_PTHREAD_KEY_CREATE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SETSPECIFIC''@|$(REPLACE_PTHREAD_SETSPECIFIC)|g' \
+	      -e 's|@''REPLACE_PTHREAD_GETSPECIFIC''@|$(REPLACE_PTHREAD_GETSPECIFIC)|g' \
+	      -e 's|@''REPLACE_PTHREAD_KEY_DELETE''@|$(REPLACE_PTHREAD_KEY_DELETE)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_INIT''@|$(REPLACE_PTHREAD_SPIN_INIT)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_LOCK''@|$(REPLACE_PTHREAD_SPIN_LOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_TRYLOCK''@|$(REPLACE_PTHREAD_SPIN_TRYLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_UNLOCK''@|$(REPLACE_PTHREAD_SPIN_UNLOCK)|g' \
+	      -e 's|@''REPLACE_PTHREAD_SPIN_DESTROY''@|$(REPLACE_PTHREAD_SPIN_DESTROY)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _Noreturn/r $(_NORETURN_H)' \
+	      -e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)'; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create a replacement for <sched.h> when
+# the system doesn't have one.
+sched.h: sched.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''HAVE_SCHED_H''@|$(HAVE_SCHED_H)|g' \
+	      -e 's|@''HAVE_SYS_CDEFS_H''@|$(HAVE_SYS_CDEFS_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SCHED_H''@|$(NEXT_SCHED_H)|g' \
+	      -e 's|@''HAVE_STRUCT_SCHED_PARAM''@|$(HAVE_STRUCT_SCHED_PARAM)|g' \
+	      -e 's/@''GNULIB_SCHED_YIELD''@/$(GL_GGL_GNULIB_SCHED_YIELD)/g' \
+	      -e 's|@''HAVE_SCHED_YIELD''@|$(HAVE_SCHED_YIELD)|g' \
+	      -e 's|@''REPLACE_SCHED_YIELD''@|$(REPLACE_SCHED_YIELD)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sched.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# We need the following in order to create <sys/ioctl.h> when the system
+# does not have a complete one.
+sys/ioctl.h: sys_ioctl.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(WARN_ON_USE_H)
+	$(AM_V_at)$(MKDIR_P) sys
+	$(AM_V_GEN)rm -f $@-t $@ && \
+	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
+	  sed -e 's|@''GUARD_PREFIX''@|GL_GGL|g' \
+	      -e 's|@''HAVE_SYS_IOCTL_H''@|$(HAVE_SYS_IOCTL_H)|g' \
+	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''NEXT_SYS_IOCTL_H''@|$(NEXT_SYS_IOCTL_H)|g' \
+	      -e 's/@''GNULIB_IOCTL''@/$(GL_GGL_GNULIB_IOCTL)/g' \
+	      -e 's|@''SYS_IOCTL_H_HAVE_WINSOCK2_H''@|$(SYS_IOCTL_H_HAVE_WINSOCK2_H)|g' \
+	      -e 's|@''SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS''@|$(SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS)|g' \
+	      -e 's|@''REPLACE_IOCTL''@|$(REPLACE_IOCTL)|g' \
+	      -e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
+	      -e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
+	      < $(srcdir)/sys_ioctl.in.h; \
+	} > $@-t && \
+	mv $@-t $@
+
+# Clean up after Solaris cc.
+clean-local:
+	rm -rf SunWS_cache
+
+mostlyclean-local: mostlyclean-generic
+	@for dir in '' $(MOSTLYCLEANDIRS); do \
+	  if test -n "$$dir" && test -d $$dir; then \
+	    echo "rmdir $$dir"; rmdir $$dir; \
+	  fi; \
+	done; \
+	:
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/gl/tests/_Noreturn.h b/src/gl/tests/_Noreturn.h
new file mode 100644
index 0000000..fb718bc
--- /dev/null
+++ b/src/gl/tests/_Noreturn.h
@@ -0,0 +1,45 @@
+/* A C macro for declaring that a function does not return.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _Noreturn
+# if (defined __cplusplus \
+      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
+#  define _Noreturn [[noreturn]]
+# elif ((!defined __cplusplus || defined __clang__) \
+        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+            || (!defined __STRICT_ANSI__ \
+                && (__4 < __GNUC__ + (7 <= __GNUC_MINOR__) \
+                    || (defined __apple_build_version__ \
+                        ? 6000000 <= __apple_build_version__ \
+                        : 3 < __clang_major__ + (5 <= __clang_minor__))))))
+   /* _Noreturn works as-is.  */
+# elif (2 < __GNUC__ + (8 <= __GNUC_MINOR__) || defined __clang__ \
+        || 0x5110 <= __SUNPRO_C)
+#  define _Noreturn __attribute__ ((__noreturn__))
+# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn
+# endif
+#endif
diff --git a/src/gl/tests/anytostr.c b/src/gl/tests/anytostr.c
new file mode 100644
index 0000000..780b7be
--- /dev/null
+++ b/src/gl/tests/anytostr.c
@@ -0,0 +1,57 @@
+/* anytostr.c -- convert integers to printable strings
+
+   Copyright (C) 2001, 2006, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert */
+
+/* Tell gcc not to warn about the (i < 0) test, below.  */
+#if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
+# pragma GCC diagnostic ignored "-Wtype-limits"
+#elif defined __clang__
+# pragma clang diagnostic ignored "-Wtautological-compare"
+#endif
+
+#include <config.h>
+
+#include "inttostr.h"
+
+/* Convert I to a printable string in BUF, which must be at least
+   INT_BUFSIZE_BOUND (INTTYPE) bytes long.  Return the address of the
+   printable string, which need not start at BUF.  */
+
+char * _GL_ATTRIBUTE_NODISCARD
+anytostr (inttype i, char *buf)
+{
+  char *p = buf + INT_STRLEN_BOUND (inttype);
+  *p = 0;
+
+  if (i < 0)
+    {
+      do
+        *--p = '0' - i % 10;
+      while ((i /= 10) != 0);
+
+      *--p = '-';
+    }
+  else
+    {
+      do
+        *--p = '0' + i % 10;
+      while ((i /= 10) != 0);
+    }
+
+  return p;
+}
diff --git a/src/gl/tests/arg-nonnull.h b/src/gl/tests/arg-nonnull.h
new file mode 100644
index 0000000..5b81b50
--- /dev/null
+++ b/src/gl/tests/arg-nonnull.h
@@ -0,0 +1,26 @@
+/* A C macro for declaring that specific arguments must not be NULL.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
+   that the values passed as arguments n, ..., m must be non-NULL pointers.
+   n = 1 stands for the first argument, n = 2 for the second argument etc.  */
+#ifndef _GL_ARG_NONNULL
+# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined __clang__
+#  define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
+# else
+#  define _GL_ARG_NONNULL(params)
+# endif
+#endif
diff --git a/src/gl/tests/atoll.c b/src/gl/tests/atoll.c
new file mode 100644
index 0000000..bf50bfc
--- /dev/null
+++ b/src/gl/tests/atoll.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 1991, 1997-1998, 2008-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if !_LIBC
+# include <config.h>
+#endif
+
+/* Specification.  */
+#include <stdlib.h>
+
+#if _LIBC
+# undef atoll
+#endif
+
+
+/* Convert a string to a long long int.  */
+long long int
+atoll (const char *nptr)
+{
+  return strtoll (nptr, (char **) NULL, 10);
+}
diff --git a/src/gl/tests/atomic-int-gnulib.h b/src/gl/tests/atomic-int-gnulib.h
new file mode 100644
index 0000000..1836970
--- /dev/null
+++ b/src/gl/tests/atomic-int-gnulib.h
@@ -0,0 +1,173 @@
+/* Atomic integers.  Useful for testing multithreaded locking primitives.
+   Copyright (C) 2005, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+
+/* Whether to use 'volatile' on some variables that communicate information
+   between threads.  If set to 0, a semaphore or a lock is used to protect
+   these variables.  If set to 1, 'volatile' is used; this is theoretically
+   equivalent but can lead to much slower execution (e.g. 30x slower total
+   run time on a 40-core machine), because 'volatile' does not imply any
+   synchronization/communication between different CPUs.  */
+#define USE_VOLATILE 0
+
+#if USE_POSIX_THREADS && HAVE_SEMAPHORE_H
+/* Whether to use a semaphore to communicate information between threads.
+   If set to 0, a lock is used. If set to 1, a semaphore is used.
+   Uncomment this to reduce the dependencies of this test.  */
+# define USE_SEMAPHORE 1
+/* Mac OS X provides only named semaphores (sem_open); its facility for
+   unnamed semaphores (sem_init) does not work.  */
+# if defined __APPLE__ && defined __MACH__
+#  define USE_NAMED_SEMAPHORE 1
+# else
+#  define USE_UNNAMED_SEMAPHORE 1
+# endif
+#endif
+
+
+#if USE_SEMAPHORE
+# include <errno.h>
+# include <fcntl.h>
+# include <semaphore.h>
+# include <unistd.h>
+#endif
+
+
+#if USE_VOLATILE
+struct atomic_int {
+  volatile int value;
+};
+static void
+init_atomic_int (struct atomic_int *ai)
+{
+}
+static int
+get_atomic_int_value (struct atomic_int *ai)
+{
+  return ai->value;
+}
+static void
+set_atomic_int_value (struct atomic_int *ai, int new_value)
+{
+  ai->value = new_value;
+}
+#elif USE_SEMAPHORE
+/* This atomic_int implementation can only support the values 0 and 1.
+   It is initially 0 and can be set to 1 only once.  */
+# if USE_UNNAMED_SEMAPHORE
+struct atomic_int {
+  sem_t semaphore;
+};
+#define atomic_int_semaphore(ai) (&(ai)->semaphore)
+static void
+init_atomic_int (struct atomic_int *ai)
+{
+  sem_init (&ai->semaphore, 0, 0);
+}
+# endif
+# if USE_NAMED_SEMAPHORE
+struct atomic_int {
+  sem_t *semaphore;
+};
+#define atomic_int_semaphore(ai) ((ai)->semaphore)
+static void
+init_atomic_int (struct atomic_int *ai)
+{
+  sem_t *s;
+  unsigned int count;
+  for (count = 0; ; count++)
+    {
+      char name[80];
+      /* Use getpid() in the name, so that different processes running at the
+         same time will not interfere.  Use ai in the name, so that different
+         atomic_int in the same process will not interfere.  Use a count in
+         the name, so that even in the (unlikely) case that a semaphore with
+         the specified name already exists, we can try a different name.  */
+      sprintf (name, "test-lock-%lu-%p-%u",
+               (unsigned long) getpid (), ai, count);
+      s = sem_open (name, O_CREAT | O_EXCL, 0600, 0);
+      if (s == SEM_FAILED)
+        {
+          if (errno == EEXIST)
+            /* Retry with a different name.  */
+            continue;
+          else
+            {
+              perror ("sem_open failed");
+              abort ();
+            }
+        }
+      else
+        {
+          /* Try not to leave a semaphore hanging around on the file system
+             eternally, if we can avoid it.  */
+          sem_unlink (name);
+          break;
+        }
+    }
+  ai->semaphore = s;
+}
+# endif
+static int
+get_atomic_int_value (struct atomic_int *ai)
+{
+  if (sem_trywait (atomic_int_semaphore (ai)) == 0)
+    {
+      if (sem_post (atomic_int_semaphore (ai)))
+        abort ();
+      return 1;
+    }
+  else if (errno == EAGAIN)
+    return 0;
+  else
+    abort ();
+}
+static void
+set_atomic_int_value (struct atomic_int *ai, int new_value)
+{
+  if (new_value == 0)
+    /* It's already initialized with 0.  */
+    return;
+  /* To set the value 1: */
+  if (sem_post (atomic_int_semaphore (ai)))
+    abort ();
+}
+#else
+struct atomic_int {
+  gl_lock_define (, lock)
+  int value;
+};
+static void
+init_atomic_int (struct atomic_int *ai)
+{
+  gl_lock_init (ai->lock);
+}
+static int
+get_atomic_int_value (struct atomic_int *ai)
+{
+  gl_lock_lock (ai->lock);
+  int ret = ai->value;
+  gl_lock_unlock (ai->lock);
+  return ret;
+}
+static void
+set_atomic_int_value (struct atomic_int *ai, int new_value)
+{
+  gl_lock_lock (ai->lock);
+  ai->value = new_value;
+  gl_lock_unlock (ai->lock);
+}
+#endif
diff --git a/src/gl/tests/binary-io.c b/src/gl/tests/binary-io.c
new file mode 100644
index 0000000..f267897
--- /dev/null
+++ b/src/gl/tests/binary-io.c
@@ -0,0 +1,39 @@
+/* Binary mode I/O.
+   Copyright 2017-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#define BINARY_IO_INLINE _GL_EXTERN_INLINE
+#include "binary-io.h"
+
+#if defined __DJGPP__ || defined __EMX__
+# include <unistd.h>
+
+int
+set_binary_mode (int fd, int mode)
+{
+  if (isatty (fd))
+    /* If FD refers to a console (not a pipe, not a regular file),
+       O_TEXT is the only reasonable mode, both on input and on output.
+       Silently ignore the request.  If we were to return -1 here,
+       all programs that use xset_binary_mode would fail when run
+       with console input or console output.  */
+    return O_TEXT;
+  else
+    return __gl_setmode (fd, mode);
+}
+
+#endif
diff --git a/src/gl/tests/binary-io.h b/src/gl/tests/binary-io.h
new file mode 100644
index 0000000..8654fd2
--- /dev/null
+++ b/src/gl/tests/binary-io.h
@@ -0,0 +1,77 @@
+/* Binary mode I/O.
+   Copyright (C) 2001, 2003, 2005, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _BINARY_H
+#define _BINARY_H
+
+/* For systems that distinguish between text and binary I/O.
+   O_BINARY is guaranteed by the gnulib <fcntl.h>. */
+#include <fcntl.h>
+
+/* The MSVC7 <stdio.h> doesn't like to be included after '#define fileno ...',
+   so we include it here first.  */
+#include <stdio.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef BINARY_IO_INLINE
+# define BINARY_IO_INLINE _GL_INLINE
+#endif
+
+#if O_BINARY
+# if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__
+#  include <io.h> /* declares setmode() */
+#  define __gl_setmode setmode
+# else
+#  define __gl_setmode _setmode
+#  undef fileno
+#  define fileno _fileno
+# endif
+#else
+  /* On reasonable systems, binary I/O is the only choice.  */
+  /* Use a function rather than a macro, to avoid gcc warnings
+     "warning: statement with no effect".  */
+BINARY_IO_INLINE int
+__gl_setmode (int fd _GL_UNUSED, int mode _GL_UNUSED)
+{
+  return O_BINARY;
+}
+#endif
+
+/* Set FD's mode to MODE, which should be either O_TEXT or O_BINARY.
+   Return the old mode if successful, -1 (setting errno) on failure.
+   Ordinarily this function would be called 'setmode', since that is
+   its old name on MS-Windows, but it is called 'set_binary_mode' here
+   to avoid colliding with a BSD function of another name.  */
+
+#if defined __DJGPP__ || defined __EMX__
+extern int set_binary_mode (int fd, int mode);
+#else
+BINARY_IO_INLINE int
+set_binary_mode (int fd, int mode)
+{
+  return __gl_setmode (fd, mode);
+}
+#endif
+
+/* This macro is obsolescent.  */
+#define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY))
+
+_GL_INLINE_HEADER_END
+
+#endif /* _BINARY_H */
diff --git a/src/gl/tests/c++defs.h b/src/gl/tests/c++defs.h
new file mode 100644
index 0000000..39df1bc
--- /dev/null
+++ b/src/gl/tests/c++defs.h
@@ -0,0 +1,331 @@
+/* C++ compatible function declaration macros.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_CXXDEFS_H
+#define _GL_CXXDEFS_H
+
+/* Begin/end the GNULIB_NAMESPACE namespace.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_BEGIN_NAMESPACE namespace GNULIB_NAMESPACE {
+# define _GL_END_NAMESPACE }
+#else
+# define _GL_BEGIN_NAMESPACE
+# define _GL_END_NAMESPACE
+#endif
+
+/* The three most frequent use cases of these macros are:
+
+   * For providing a substitute for a function that is missing on some
+     platforms, but is declared and works fine on the platforms on which
+     it exists:
+
+       #if @GNULIB_FOO@
+       # if !@HAVE_FOO@
+       _GL_FUNCDECL_SYS (foo, ...);
+       # endif
+       _GL_CXXALIAS_SYS (foo, ...);
+       _GL_CXXALIASWARN (foo);
+       #elif defined GNULIB_POSIXCHECK
+       ...
+       #endif
+
+   * For providing a replacement for a function that exists on all platforms,
+     but is broken/insufficient and needs to be replaced on some platforms:
+
+       #if @GNULIB_FOO@
+       # if @REPLACE_FOO@
+       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+       #   undef foo
+       #   define foo rpl_foo
+       #  endif
+       _GL_FUNCDECL_RPL (foo, ...);
+       _GL_CXXALIAS_RPL (foo, ...);
+       # else
+       _GL_CXXALIAS_SYS (foo, ...);
+       # endif
+       _GL_CXXALIASWARN (foo);
+       #elif defined GNULIB_POSIXCHECK
+       ...
+       #endif
+
+   * For providing a replacement for a function that exists on some platforms
+     but is broken/insufficient and needs to be replaced on some of them and
+     is additionally either missing or undeclared on some other platforms:
+
+       #if @GNULIB_FOO@
+       # if @REPLACE_FOO@
+       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+       #   undef foo
+       #   define foo rpl_foo
+       #  endif
+       _GL_FUNCDECL_RPL (foo, ...);
+       _GL_CXXALIAS_RPL (foo, ...);
+       # else
+       #  if !@HAVE_FOO@   or   if !@HAVE_DECL_FOO@
+       _GL_FUNCDECL_SYS (foo, ...);
+       #  endif
+       _GL_CXXALIAS_SYS (foo, ...);
+       # endif
+       _GL_CXXALIASWARN (foo);
+       #elif defined GNULIB_POSIXCHECK
+       ...
+       #endif
+*/
+
+/* _GL_EXTERN_C declaration;
+   performs the declaration with C linkage.  */
+#if defined __cplusplus
+# define _GL_EXTERN_C extern "C"
+#else
+# define _GL_EXTERN_C extern
+#endif
+
+/* _GL_FUNCDECL_RPL (func, rettype, parameters_and_attributes);
+   declares a replacement function, named rpl_func, with the given prototype,
+   consisting of return type, parameters, and attributes.
+   Example:
+     _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
+                                  _GL_ARG_NONNULL ((1)));
+ */
+#define _GL_FUNCDECL_RPL(func,rettype,parameters_and_attributes) \
+  _GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters_and_attributes)
+#define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters_and_attributes) \
+  _GL_EXTERN_C rettype rpl_func parameters_and_attributes
+
+/* _GL_FUNCDECL_SYS (func, rettype, parameters_and_attributes);
+   declares the system function, named func, with the given prototype,
+   consisting of return type, parameters, and attributes.
+   Example:
+     _GL_FUNCDECL_SYS (open, int, (const char *filename, int flags, ...)
+                                  _GL_ARG_NONNULL ((1)));
+ */
+#define _GL_FUNCDECL_SYS(func,rettype,parameters_and_attributes) \
+  _GL_EXTERN_C rettype func parameters_and_attributes
+
+/* _GL_CXXALIAS_RPL (func, rettype, parameters);
+   declares a C++ alias called GNULIB_NAMESPACE::func
+   that redirects to rpl_func, if GNULIB_NAMESPACE is defined.
+   Example:
+     _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
+
+   Wrapping rpl_func in an object with an inline conversion operator
+   avoids a reference to rpl_func unless GNULIB_NAMESPACE::func is
+   actually used in the program.  */
+#define _GL_CXXALIAS_RPL(func,rettype,parameters) \
+  _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters)
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
+    namespace GNULIB_NAMESPACE                                \
+    {                                                         \
+      static const struct _gl_ ## func ## _wrapper            \
+      {                                                       \
+        typedef rettype (*type) parameters;                   \
+                                                              \
+        inline operator type () const                         \
+        {                                                     \
+          return ::rpl_func;                                  \
+        }                                                     \
+      } func = {};                                            \
+    }                                                         \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_MDA (func, rettype, parameters);
+   is to be used when func is a Microsoft deprecated alias, on native Windows.
+   It declares a C++ alias called GNULIB_NAMESPACE::func
+   that redirects to _func, if GNULIB_NAMESPACE is defined.
+   Example:
+     _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...));
+ */
+#define _GL_CXXALIAS_MDA(func,rettype,parameters) \
+  _GL_CXXALIAS_RPL_1 (func, _##func, rettype, parameters)
+
+/* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters);
+   is like  _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters);
+   except that the C function rpl_func may have a slightly different
+   declaration.  A cast is used to silence the "invalid conversion" error
+   that would otherwise occur.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
+    namespace GNULIB_NAMESPACE                                     \
+    {                                                              \
+      static const struct _gl_ ## func ## _wrapper                 \
+      {                                                            \
+        typedef rettype (*type) parameters;                        \
+                                                                   \
+        inline operator type () const                              \
+        {                                                          \
+          return reinterpret_cast<type>(::rpl_func);               \
+        }                                                          \
+      } func = {};                                                 \
+    }                                                              \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_MDA_CAST (func, rettype, parameters);
+   is like  _GL_CXXALIAS_MDA (func, rettype, parameters);
+   except that the C function func may have a slightly different declaration.
+   A cast is used to silence the "invalid conversion" error that would
+   otherwise occur.  */
+#define _GL_CXXALIAS_MDA_CAST(func,rettype,parameters) \
+  _GL_CXXALIAS_RPL_CAST_1 (func, _##func, rettype, parameters)
+
+/* _GL_CXXALIAS_SYS (func, rettype, parameters);
+   declares a C++ alias called GNULIB_NAMESPACE::func
+   that redirects to the system provided function func, if GNULIB_NAMESPACE
+   is defined.
+   Example:
+     _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
+
+   Wrapping func in an object with an inline conversion operator
+   avoids a reference to func unless GNULIB_NAMESPACE::func is
+   actually used in the program.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_SYS(func,rettype,parameters)            \
+    namespace GNULIB_NAMESPACE                                \
+    {                                                         \
+      static const struct _gl_ ## func ## _wrapper            \
+      {                                                       \
+        typedef rettype (*type) parameters;                   \
+                                                              \
+        inline operator type () const                         \
+        {                                                     \
+          return ::func;                                      \
+        }                                                     \
+      } func = {};                                            \
+    }                                                         \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_SYS(func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters);
+   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
+   except that the C function func may have a slightly different declaration.
+   A cast is used to silence the "invalid conversion" error that would
+   otherwise occur.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
+    namespace GNULIB_NAMESPACE                          \
+    {                                                   \
+      static const struct _gl_ ## func ## _wrapper      \
+      {                                                 \
+        typedef rettype (*type) parameters;             \
+                                                        \
+        inline operator type () const                   \
+        {                                               \
+          return reinterpret_cast<type>(::func);        \
+        }                                               \
+      } func = {};                                      \
+    }                                                   \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2);
+   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
+   except that the C function is picked among a set of overloaded functions,
+   namely the one with rettype2 and parameters2.  Two consecutive casts
+   are used to silence the "cannot find a match" and "invalid conversion"
+   errors that would otherwise occur.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+  /* The outer cast must be a reinterpret_cast.
+     The inner cast: When the function is defined as a set of overloaded
+     functions, it works as a static_cast<>, choosing the designated variant.
+     When the function is defined as a single variant, it works as a
+     reinterpret_cast<>. The parenthesized cast syntax works both ways.  */
+# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
+    namespace GNULIB_NAMESPACE                                                \
+    {                                                                         \
+      static const struct _gl_ ## func ## _wrapper                            \
+      {                                                                       \
+        typedef rettype (*type) parameters;                                   \
+                                                                              \
+        inline operator type () const                                         \
+        {                                                                     \
+          return reinterpret_cast<type>((rettype2 (*) parameters2)(::func));  \
+        }                                                                     \
+      } func = {};                                                            \
+    }                                                                         \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#else
+# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIASWARN (func);
+   causes a warning to be emitted when ::func is used but not when
+   GNULIB_NAMESPACE::func is used.  func must be defined without overloaded
+   variants.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIASWARN(func) \
+   _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE)
+# define _GL_CXXALIASWARN_1(func,namespace) \
+   _GL_CXXALIASWARN_2 (func, namespace)
+/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
+   we enable the warning only when not optimizing.  */
+# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
+#  define _GL_CXXALIASWARN_2(func,namespace) \
+    _GL_WARN_ON_USE (func, \
+                     "The symbol ::" #func " refers to the system function. " \
+                     "Use " #namespace "::" #func " instead.")
+# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
+#  define _GL_CXXALIASWARN_2(func,namespace) \
+     extern __typeof__ (func) func
+# else
+#  define _GL_CXXALIASWARN_2(func,namespace) \
+     _GL_EXTERN_C int _gl_cxxalias_dummy
+# endif
+#else
+# define _GL_CXXALIASWARN(func) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+/* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes);
+   causes a warning to be emitted when the given overloaded variant of ::func
+   is used but not when GNULIB_NAMESPACE::func is used.  */
+#if defined __cplusplus && defined GNULIB_NAMESPACE
+# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
+   _GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \
+                        GNULIB_NAMESPACE)
+# define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \
+   _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace)
+/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
+   we enable the warning only when not optimizing.  */
+# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
+#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
+    _GL_WARN_ON_USE_CXX (func, rettype, rettype, parameters_and_attributes, \
+                         "The symbol ::" #func " refers to the system function. " \
+                         "Use " #namespace "::" #func " instead.")
+# else
+#  define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
+     _GL_EXTERN_C int _gl_cxxalias_dummy
+# endif
+#else
+# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
+    _GL_EXTERN_C int _gl_cxxalias_dummy
+#endif
+
+#endif /* _GL_CXXDEFS_H */
diff --git a/src/gl/tests/ctype.in.h b/src/gl/tests/ctype.in.h
new file mode 100644
index 0000000..511a362
--- /dev/null
+++ b/src/gl/tests/ctype.in.h
@@ -0,0 +1,57 @@
+/* A substitute for ISO C99 <ctype.h>, for platforms on which it is incomplete.
+
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible.  */
+
+/*
+ * ISO C 99 <ctype.h> for platforms on which it is incomplete.
+ * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/ctype.h.html>
+ */
+
+#ifndef _@GUARD_PREFIX@_CTYPE_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* Include the original <ctype.h>.  */
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_CTYPE_H@
+
+#ifndef _@GUARD_PREFIX@_CTYPE_H
+#define _@GUARD_PREFIX@_CTYPE_H
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* Return non-zero if c is a blank, i.e. a space or tab character.  */
+#if @GNULIB_ISBLANK@
+# if !@HAVE_ISBLANK@
+_GL_EXTERN_C int isblank (int c);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef isblank
+# if HAVE_RAW_DECL_ISBLANK
+_GL_WARN_ON_USE (isblank, "isblank is unportable - "
+                 "use gnulib module isblank for portability");
+# endif
+#endif
+
+#endif /* _@GUARD_PREFIX@_CTYPE_H */
+#endif /* _@GUARD_PREFIX@_CTYPE_H */
diff --git a/src/gl/tests/dtotimespec.c b/src/gl/tests/dtotimespec.c
new file mode 100644
index 0000000..73061a3
--- /dev/null
+++ b/src/gl/tests/dtotimespec.c
@@ -0,0 +1,53 @@
+/* Convert double to timespec.
+
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Paul Eggert */
+
+/* Convert the double value SEC to a struct timespec.  Round toward
+   positive infinity.  On overflow, return an extremal value.  */
+
+#include <config.h>
+
+#include "timespec.h"
+
+#include "intprops.h"
+
+struct timespec
+dtotimespec (double sec)
+{
+  if (! (TYPE_MINIMUM (time_t) < sec))
+    return make_timespec (TYPE_MINIMUM (time_t), 0);
+  else if (! (sec < 1.0 + TYPE_MAXIMUM (time_t)))
+    return make_timespec (TYPE_MAXIMUM (time_t), TIMESPEC_HZ - 1);
+  else
+    {
+      time_t s = sec;
+      double frac = TIMESPEC_HZ * (sec - s);
+      long ns = frac;
+      ns += ns < frac;
+      s += ns / TIMESPEC_HZ;
+      ns %= TIMESPEC_HZ;
+
+      if (ns < 0)
+        {
+          s--;
+          ns += TIMESPEC_HZ;
+        }
+
+      return make_timespec (s, ns);
+    }
+}
diff --git a/src/gl/tests/fdopen.c b/src/gl/tests/fdopen.c
new file mode 100644
index 0000000..3ef9a1d
--- /dev/null
+++ b/src/gl/tests/fdopen.c
@@ -0,0 +1,73 @@
+/* Open a stream with a given file descriptor.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <errno.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#undef fdopen
+
+#if defined _WIN32 && !defined __CYGWIN__
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static FILE *
+fdopen_nothrow (int fd, const char *mode)
+{
+  FILE *result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _fdopen (fd, mode);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = NULL;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+# else
+#  define fdopen_nothrow _fdopen
+# endif
+#else
+# define fdopen_nothrow fdopen
+#endif
+
+FILE *
+rpl_fdopen (int fd, const char *mode)
+{
+  int saved_errno = errno;
+  FILE *fp;
+
+  errno = 0;
+  fp = fdopen_nothrow (fd, mode);
+  if (fp == NULL)
+    {
+      if (errno == 0)
+        errno = EBADF;
+    }
+  else
+    errno = saved_errno;
+
+  return fp;
+}
diff --git a/src/gl/tests/fpucw.h b/src/gl/tests/fpucw.h
new file mode 100644
index 0000000..f6ed550
--- /dev/null
+++ b/src/gl/tests/fpucw.h
@@ -0,0 +1,108 @@
+/* Manipulating the FPU control word.  -*- coding: utf-8 -*-
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2007.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _FPUCW_H
+#define _FPUCW_H
+
+/* The i386 floating point hardware (the 387 compatible FPU, not the modern
+   SSE/SSE2 hardware) has a controllable rounding precision.  It is specified
+   through the 'PC' bits in the FPU control word ('fctrl' register).  (See
+   the GNU libc i386 <fpu_control.h> header for details.)
+
+   On some platforms, such as Linux or Solaris, the default precision setting
+   is set to "extended precision".  This means that 'long double' instructions
+   operate correctly, but 'double' computations often produce slightly
+   different results as on strictly IEEE 754 conforming systems.
+
+   On some platforms, such as NetBSD, the default precision is set to
+   "double precision".  This means that 'long double' instructions will operate
+   only as 'double', i.e. lead to wrong results.  Similarly on FreeBSD 6.4, at
+   least for the division of 'long double' numbers.
+
+   The FPU control word is under control of the application, i.e. it is
+   not required to be set either way by the ABI.  (In fact, the i386 ABI
+   https://www.linux-mips.org/pub/linux/mips/doc/ABI/abi386-4.pdf page 3-12 = page 38
+   is not clear about it.  But in any case, gcc treats the control word
+   like a "preserved" register: it emits code that assumes that the control
+   word is preserved across calls, and it restores the control word at the
+   end of functions that modify it.)
+
+   See Vincent Lefèvre's page https://www.vinc17.net/research/extended.en.html
+   for a good explanation.
+   See https://web.archive.org/web/20060905133417/http://www.uwsg.iu.edu/hypermail/linux/kernel/0103.0/0453.html
+   some argumentation which setting should be the default.  */
+
+/* This header file provides the following facilities:
+     fpucw_t                        integral type holding the value of 'fctrl'
+     FPU_PC_MASK                    bit mask denoting the precision control
+     FPU_PC_DOUBLE                  precision control for 53 bits mantissa
+     FPU_PC_EXTENDED                precision control for 64 bits mantissa
+     GET_FPUCW ()                   yields the current FPU control word
+     SET_FPUCW (word)               sets the FPU control word
+     DECL_LONG_DOUBLE_ROUNDING      variable declaration for
+                                    BEGIN/END_LONG_DOUBLE_ROUNDING
+     BEGIN_LONG_DOUBLE_ROUNDING ()  starts a sequence of instructions with
+                                    'long double' safe operation precision
+     END_LONG_DOUBLE_ROUNDING ()    ends a sequence of instructions with
+                                    'long double' safe operation precision
+ */
+
+/* Inline assembler like this works only with GNU C and clang.  */
+#if (defined __i386__ || defined __x86_64__) && (defined __GNUC__ || defined __clang__)
+
+typedef unsigned short fpucw_t; /* glibc calls this fpu_control_t */
+
+# define FPU_PC_MASK 0x0300
+# define FPU_PC_DOUBLE 0x200    /* glibc calls this _FPU_DOUBLE */
+# define FPU_PC_EXTENDED 0x300  /* glibc calls this _FPU_EXTENDED */
+
+# define GET_FPUCW() __extension__ \
+  ({ fpucw_t _cw;                                               \
+     __asm__ __volatile__ ("fnstcw %0" : "=m" (*&_cw));         \
+     _cw;                                                       \
+   })
+# define SET_FPUCW(word) __extension__ \
+  (void)({ fpucw_t _ncw = (word);                               \
+           __asm__ __volatile__ ("fldcw %0" : : "m" (*&_ncw));  \
+         })
+
+# define DECL_LONG_DOUBLE_ROUNDING \
+  fpucw_t oldcw;
+# define BEGIN_LONG_DOUBLE_ROUNDING() \
+  (void)(oldcw = GET_FPUCW (),                                  \
+         SET_FPUCW ((oldcw & ~FPU_PC_MASK) | FPU_PC_EXTENDED))
+# define END_LONG_DOUBLE_ROUNDING() \
+  SET_FPUCW (oldcw)
+
+#else
+
+typedef unsigned int fpucw_t;
+
+# define FPU_PC_MASK 0
+# define FPU_PC_DOUBLE 0
+# define FPU_PC_EXTENDED 0
+
+# define GET_FPUCW() 0
+# define SET_FPUCW(word) (void)(word)
+
+# define DECL_LONG_DOUBLE_ROUNDING
+# define BEGIN_LONG_DOUBLE_ROUNDING()
+# define END_LONG_DOUBLE_ROUNDING()
+
+#endif
+
+#endif /* _FPUCW_H */
diff --git a/src/gl/tests/ftruncate.c b/src/gl/tests/ftruncate.c
new file mode 100644
index 0000000..873f302
--- /dev/null
+++ b/src/gl/tests/ftruncate.c
@@ -0,0 +1,195 @@
+/* ftruncate emulations for native Windows.
+   Copyright (C) 1992-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#if HAVE__CHSIZE
+/* A native Windows platform.  */
+
+# include <errno.h>
+
+# if _GL_WINDOWS_64_BIT_OFF_T
+
+/* Large File Support: off_t is 64-bit, but _chsize() takes only a 32-bit
+   argument.  So, define a 64-bit safe SetFileSize function ourselves.  */
+
+/* Ensure that <windows.h> declares GetFileSizeEx.  */
+#  if !defined _WIN32_WINNT || (_WIN32_WINNT < _WIN32_WINNT_WIN2K)
+#   undef _WIN32_WINNT
+#   define _WIN32_WINNT _WIN32_WINNT_WIN2K
+#  endif
+
+/* Get declarations of the native Windows API functions.  */
+#  define WIN32_LEAN_AND_MEAN
+#  include <windows.h>
+
+/* Get _get_osfhandle.  */
+#  if GNULIB_MSVC_NOTHROW
+#   include "msvc-nothrow.h"
+#  else
+#   include <io.h>
+#  endif
+
+static BOOL
+SetFileSize (HANDLE h, LONGLONG size)
+{
+  LARGE_INTEGER old_size;
+
+  if (!GetFileSizeEx (h, &old_size))
+    return FALSE;
+
+  if (size != old_size.QuadPart)
+    {
+      /* Duplicate the handle, so we are free to modify its file position.  */
+      HANDLE curr_process = GetCurrentProcess ();
+      HANDLE tmph;
+
+      if (!DuplicateHandle (curr_process,           /* SourceProcessHandle */
+                            h,                      /* SourceHandle */
+                            curr_process,           /* TargetProcessHandle */
+                            (PHANDLE) &tmph,        /* TargetHandle */
+                            (DWORD) 0,              /* DesiredAccess */
+                            FALSE,                  /* InheritHandle */
+                            DUPLICATE_SAME_ACCESS)) /* Options */
+        return FALSE;
+
+      if (size < old_size.QuadPart)
+        {
+          /* Reduce the size.  */
+          LONG size_hi = (LONG) (size >> 32);
+          if (SetFilePointer (tmph, (LONG) size, &size_hi, FILE_BEGIN)
+              == INVALID_SET_FILE_POINTER
+              && GetLastError() != NO_ERROR)
+            {
+              CloseHandle (tmph);
+              return FALSE;
+            }
+          if (!SetEndOfFile (tmph))
+            {
+              CloseHandle (tmph);
+              return FALSE;
+            }
+        }
+      else
+        {
+          /* Increase the size by adding zero bytes at the end.  */
+          static char zero_bytes[1024];
+          LONG pos_hi = 0;
+          LONG pos_lo = SetFilePointer (tmph, (LONG) 0, &pos_hi, FILE_END);
+          LONGLONG pos;
+          if (pos_lo == INVALID_SET_FILE_POINTER
+              && GetLastError() != NO_ERROR)
+            {
+              CloseHandle (tmph);
+              return FALSE;
+            }
+          pos = ((LONGLONG) pos_hi << 32) | (ULONGLONG) (ULONG) pos_lo;
+          while (pos < size)
+            {
+              DWORD written;
+              LONGLONG count = size - pos;
+              if (count > sizeof (zero_bytes))
+                count = sizeof (zero_bytes);
+              if (!WriteFile (tmph, zero_bytes, (DWORD) count, &written, NULL)
+                  || written == 0)
+                {
+                  CloseHandle (tmph);
+                  return FALSE;
+                }
+              pos += (ULONGLONG) (ULONG) written;
+            }
+        }
+      /* Close the handle.  */
+      CloseHandle (tmph);
+    }
+  return TRUE;
+}
+
+int
+ftruncate (int fd, off_t length)
+{
+  HANDLE handle = (HANDLE) _get_osfhandle (fd);
+
+  if (handle == INVALID_HANDLE_VALUE)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  if (length < 0)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  if (!SetFileSize (handle, length))
+    {
+      switch (GetLastError ())
+        {
+        case ERROR_ACCESS_DENIED:
+          errno = EACCES;
+          break;
+        case ERROR_HANDLE_DISK_FULL:
+        case ERROR_DISK_FULL:
+        case ERROR_DISK_TOO_FRAGMENTED:
+          errno = ENOSPC;
+          break;
+        default:
+          errno = EIO;
+          break;
+        }
+      return -1;
+    }
+  return 0;
+}
+
+# else
+
+#  include <io.h>
+
+#  if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+#   include "msvc-inval.h"
+static int
+chsize_nothrow (int fd, long length)
+{
+  int result;
+
+  TRY_MSVC_INVAL
+    {
+      result = _chsize (fd, length);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = -1;
+      errno = EBADF;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+#  else
+#   define chsize_nothrow _chsize
+#  endif
+
+int
+ftruncate (int fd, off_t length)
+{
+  return chsize_nothrow (fd, length);
+}
+
+# endif
+#endif
diff --git a/src/gl/tests/getcwd-lgpl.c b/src/gl/tests/getcwd-lgpl.c
new file mode 100644
index 0000000..bfb33a8
--- /dev/null
+++ b/src/gl/tests/getcwd-lgpl.c
@@ -0,0 +1,127 @@
+/* Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   This file is part of gnulib.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification */
+#include <unistd.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if GNULIB_GETCWD
+/* Favor GPL getcwd.c if both getcwd and getcwd-lgpl modules are in use.  */
+typedef int dummy;
+#else
+
+/* Get the name of the current working directory, and put it in SIZE
+   bytes of BUF.  Returns NULL if the directory couldn't be determined
+   (perhaps because the absolute name was longer than PATH_MAX, or
+   because of missing read/search permissions on parent directories)
+   or SIZE was too small.  If successful, returns BUF.  If BUF is
+   NULL, an array is allocated with 'malloc'; the array is SIZE bytes
+   long, unless SIZE == 0, in which case it is as big as
+   necessary.  */
+
+# undef getcwd
+# if defined _WIN32 && !defined __CYGWIN__
+#  define getcwd _getcwd
+# endif
+
+char *
+rpl_getcwd (char *buf, size_t size)
+{
+  char *ptr;
+  char *result;
+
+  /* Handle single size operations.  */
+  if (buf)
+    {
+      if (!size)
+        {
+          errno = EINVAL;
+          return NULL;
+        }
+      return getcwd (buf, size);
+    }
+
+  if (size)
+    {
+      buf = malloc (size);
+      if (!buf)
+        {
+          errno = ENOMEM;
+          return NULL;
+        }
+      result = getcwd (buf, size);
+      if (!result)
+        free (buf);
+      return result;
+    }
+
+  /* Flexible sizing requested.  Avoid over-allocation for the common
+     case of a name that fits within a 4k page, minus some space for
+     local variables, to be sure we don't skip over a guard page.  */
+  {
+    char tmp[4032];
+    size = sizeof tmp;
+    ptr = getcwd (tmp, size);
+    if (ptr)
+      {
+        result = strdup (ptr);
+        if (!result)
+          errno = ENOMEM;
+        return result;
+      }
+    if (errno != ERANGE)
+      return NULL;
+  }
+
+  /* My what a large directory name we have.  */
+  do
+    {
+      size <<= 1;
+      ptr = realloc (buf, size);
+      if (ptr == NULL)
+        {
+          free (buf);
+          errno = ENOMEM;
+          return NULL;
+        }
+      buf = ptr;
+      result = getcwd (buf, size);
+    }
+  while (!result && errno == ERANGE);
+
+  if (!result)
+    free (buf);
+  else
+    {
+      /* Here result == buf.  */
+      /* Shrink result before returning it.  */
+      size_t actual_size = strlen (result) + 1;
+      if (actual_size < size)
+        {
+          char *shrinked_result = realloc (result, actual_size);
+          if (shrinked_result != NULL)
+            result = shrinked_result;
+        }
+    }
+  return result;
+}
+
+#endif
diff --git a/src/gl/tests/getpagesize.c b/src/gl/tests/getpagesize.c
new file mode 100644
index 0000000..dab0462
--- /dev/null
+++ b/src/gl/tests/getpagesize.c
@@ -0,0 +1,39 @@
+/* getpagesize emulation for systems where it cannot be done in a C macro.
+
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible and Martin Lambers.  */
+
+#include <config.h>
+
+/* Specification. */
+#include <unistd.h>
+
+/* This implementation is only for native Windows systems.  */
+#if defined _WIN32 && ! defined __CYGWIN__
+
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+
+int
+getpagesize (void)
+{
+  SYSTEM_INFO system_info;
+  GetSystemInfo (&system_info);
+  return system_info.dwPageSize;
+}
+
+#endif
diff --git a/src/gl/tests/gl_array_list.c b/src/gl/tests/gl_array_list.c
new file mode 100644
index 0000000..203e618
--- /dev/null
+++ b/src/gl/tests/gl_array_list.c
@@ -0,0 +1,697 @@
+/* Sequential list data type implemented by an array.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2006.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "gl_array_list.h"
+
+#include <stdint.h>
+#include <stdlib.h>
+/* Get memcpy.  */
+#include <string.h>
+
+/* Checked size_t computations.  */
+#include "xsize.h"
+
+/* -------------------------- gl_list_t Data Type -------------------------- */
+
+/* Concrete gl_list_impl type, valid for this file only.  */
+struct gl_list_impl
+{
+  struct gl_list_impl_base base;
+  /* An array of ALLOCATED elements, of which the first COUNT are used.
+     0 <= COUNT <= ALLOCATED.  */
+  const void **elements;
+  size_t count;
+  size_t allocated;
+};
+
+/* struct gl_list_node_impl doesn't exist here.  The pointers are actually
+   indices + 1.  */
+#define INDEX_TO_NODE(index) (gl_list_node_t)(uintptr_t)(size_t)((index) + 1)
+#define NODE_TO_INDEX(node) ((uintptr_t)(node) - 1)
+
+static gl_list_t
+gl_array_nx_create_empty (gl_list_implementation_t implementation,
+                          gl_listelement_equals_fn equals_fn,
+                          gl_listelement_hashcode_fn hashcode_fn,
+                          gl_listelement_dispose_fn dispose_fn,
+                          bool allow_duplicates)
+{
+  struct gl_list_impl *list =
+    (struct gl_list_impl *) malloc (sizeof (struct gl_list_impl));
+
+  if (list == NULL)
+    return NULL;
+
+  list->base.vtable = implementation;
+  list->base.equals_fn = equals_fn;
+  list->base.hashcode_fn = hashcode_fn;
+  list->base.dispose_fn = dispose_fn;
+  list->base.allow_duplicates = allow_duplicates;
+  list->elements = NULL;
+  list->count = 0;
+  list->allocated = 0;
+
+  return list;
+}
+
+static gl_list_t
+gl_array_nx_create (gl_list_implementation_t implementation,
+                    gl_listelement_equals_fn equals_fn,
+                    gl_listelement_hashcode_fn hashcode_fn,
+                    gl_listelement_dispose_fn dispose_fn,
+                    bool allow_duplicates,
+                    size_t count, const void **contents)
+{
+  struct gl_list_impl *list =
+    (struct gl_list_impl *) malloc (sizeof (struct gl_list_impl));
+
+  if (list == NULL)
+    return NULL;
+
+  list->base.vtable = implementation;
+  list->base.equals_fn = equals_fn;
+  list->base.hashcode_fn = hashcode_fn;
+  list->base.dispose_fn = dispose_fn;
+  list->base.allow_duplicates = allow_duplicates;
+  if (count > 0)
+    {
+      if (size_overflow_p (xtimes (count, sizeof (const void *))))
+        goto fail;
+      list->elements = (const void **) malloc (count * sizeof (const void *));
+      if (list->elements == NULL)
+        goto fail;
+      memcpy (list->elements, contents, count * sizeof (const void *));
+    }
+  else
+    list->elements = NULL;
+  list->count = count;
+  list->allocated = count;
+
+  return list;
+
+ fail:
+  free (list);
+  return NULL;
+}
+
+static size_t _GL_ATTRIBUTE_PURE
+gl_array_size (gl_list_t list)
+{
+  return list->count;
+}
+
+static const void * _GL_ATTRIBUTE_PURE
+gl_array_node_value (gl_list_t list, gl_list_node_t node)
+{
+  uintptr_t index = NODE_TO_INDEX (node);
+  if (!(index < list->count))
+    /* Invalid argument.  */
+    abort ();
+  return list->elements[index];
+}
+
+static int
+gl_array_node_nx_set_value (gl_list_t list, gl_list_node_t node,
+                            const void *elt)
+{
+  uintptr_t index = NODE_TO_INDEX (node);
+  if (!(index < list->count))
+    /* Invalid argument.  */
+    abort ();
+  list->elements[index] = elt;
+  return 0;
+}
+
+static gl_list_node_t _GL_ATTRIBUTE_PURE
+gl_array_next_node (gl_list_t list, gl_list_node_t node)
+{
+  uintptr_t index = NODE_TO_INDEX (node);
+  if (!(index < list->count))
+    /* Invalid argument.  */
+    abort ();
+  index++;
+  if (index < list->count)
+    return INDEX_TO_NODE (index);
+  else
+    return NULL;
+}
+
+static gl_list_node_t _GL_ATTRIBUTE_PURE
+gl_array_previous_node (gl_list_t list, gl_list_node_t node)
+{
+  uintptr_t index = NODE_TO_INDEX (node);
+  if (!(index < list->count))
+    /* Invalid argument.  */
+    abort ();
+  if (index > 0)
+    return INDEX_TO_NODE (index - 1);
+  else
+    return NULL;
+}
+
+static gl_list_node_t _GL_ATTRIBUTE_PURE
+gl_array_first_node (gl_list_t list)
+{
+  if (list->count > 0)
+    return INDEX_TO_NODE (0);
+  else
+    return NULL;
+}
+
+static gl_list_node_t _GL_ATTRIBUTE_PURE
+gl_array_last_node (gl_list_t list)
+{
+  if (list->count > 0)
+    return INDEX_TO_NODE (list->count - 1);
+  else
+    return NULL;
+}
+
+static const void * _GL_ATTRIBUTE_PURE
+gl_array_get_at (gl_list_t list, size_t position)
+{
+  size_t count = list->count;
+
+  if (!(position < count))
+    /* Invalid argument.  */
+    abort ();
+  return list->elements[position];
+}
+
+static gl_list_node_t
+gl_array_nx_set_at (gl_list_t list, size_t position, const void *elt)
+{
+  size_t count = list->count;
+
+  if (!(position < count))
+    /* Invalid argument.  */
+    abort ();
+  list->elements[position] = elt;
+  return INDEX_TO_NODE (position);
+}
+
+static size_t _GL_ATTRIBUTE_PURE
+gl_array_indexof_from_to (gl_list_t list, size_t start_index, size_t end_index,
+                          const void *elt)
+{
+  size_t count = list->count;
+
+  if (!(start_index <= end_index && end_index <= count))
+    /* Invalid arguments.  */
+    abort ();
+
+  if (start_index < end_index)
+    {
+      gl_listelement_equals_fn equals = list->base.equals_fn;
+      if (equals != NULL)
+        {
+          size_t i;
+
+          for (i = start_index;;)
+            {
+              if (equals (elt, list->elements[i]))
+                return i;
+              i++;
+              if (i == end_index)
+                break;
+            }
+        }
+      else
+        {
+          size_t i;
+
+          for (i = start_index;;)
+            {
+              if (elt == list->elements[i])
+                return i;
+              i++;
+              if (i == end_index)
+                break;
+            }
+        }
+    }
+  return (size_t)(-1);
+}
+
+static gl_list_node_t _GL_ATTRIBUTE_PURE
+gl_array_search_from_to (gl_list_t list, size_t start_index, size_t end_index,
+                         const void *elt)
+{
+  size_t index = gl_array_indexof_from_to (list, start_index, end_index, elt);
+  return INDEX_TO_NODE (index);
+}
+
+/* Ensure that list->allocated > list->count.
+   Return 0 upon success, -1 upon out-of-memory.  */
+static int
+grow (gl_list_t list)
+{
+  size_t new_allocated;
+  size_t memory_size;
+  const void **memory;
+
+  new_allocated = xtimes (list->allocated, 2);
+  new_allocated = xsum (new_allocated, 1);
+  memory_size = xtimes (new_allocated, sizeof (const void *));
+  if (size_overflow_p (memory_size))
+    /* Overflow, would lead to out of memory.  */
+    return -1;
+  memory = (const void **) realloc (list->elements, memory_size);
+  if (memory == NULL)
+    /* Out of memory.  */
+    return -1;
+  list->elements = memory;
+  list->allocated = new_allocated;
+  return 0;
+}
+
+static gl_list_node_t
+gl_array_nx_add_first (gl_list_t list, const void *elt)
+{
+  size_t count = list->count;
+  const void **elements;
+  size_t i;
+
+  if (count == list->allocated)
+    if (grow (list) < 0)
+      return NULL;
+  elements = list->elements;
+  for (i = count; i > 0; i--)
+    elements[i] = elements[i - 1];
+  elements[0] = elt;
+  list->count = count + 1;
+  return INDEX_TO_NODE (0);
+}
+
+static gl_list_node_t
+gl_array_nx_add_last (gl_list_t list, const void *elt)
+{
+  size_t count = list->count;
+
+  if (count == list->allocated)
+    if (grow (list) < 0)
+      return NULL;
+  list->elements[count] = elt;
+  list->count = count + 1;
+  return INDEX_TO_NODE (count);
+}
+
+static gl_list_node_t
+gl_array_nx_add_before (gl_list_t list, gl_list_node_t node, const void *elt)
+{
+  size_t count = list->count;
+  uintptr_t index = NODE_TO_INDEX (node);
+  size_t position;
+  const void **elements;
+  size_t i;
+
+  if (!(index < count))
+    /* Invalid argument.  */
+    abort ();
+  position = index;
+  if (count == list->allocated)
+    if (grow (list) < 0)
+      return NULL;
+  elements = list->elements;
+  for (i = count; i > position; i--)
+    elements[i] = elements[i - 1];
+  elements[position] = elt;
+  list->count = count + 1;
+  return INDEX_TO_NODE (position);
+}
+
+static gl_list_node_t
+gl_array_nx_add_after (gl_list_t list, gl_list_node_t node, const void *elt)
+{
+  size_t count = list->count;
+  uintptr_t index = NODE_TO_INDEX (node);
+  size_t position;
+  const void **elements;
+  size_t i;
+
+  if (!(index < count))
+    /* Invalid argument.  */
+    abort ();
+  position = index + 1;
+  if (count == list->allocated)
+    if (grow (list) < 0)
+      return NULL;
+  elements = list->elements;
+  for (i = count; i > position; i--)
+    elements[i] = elements[i - 1];
+  elements[position] = elt;
+  list->count = count + 1;
+  return INDEX_TO_NODE (position);
+}
+
+static gl_list_node_t
+gl_array_nx_add_at (gl_list_t list, size_t position, const void *elt)
+{
+  size_t count = list->count;
+  const void **elements;
+  size_t i;
+
+  if (!(position <= count))
+    /* Invalid argument.  */
+    abort ();
+  if (count == list->allocated)
+    if (grow (list) < 0)
+      return NULL;
+  elements = list->elements;
+  for (i = count; i > position; i--)
+    elements[i] = elements[i - 1];
+  elements[position] = elt;
+  list->count = count + 1;
+  return INDEX_TO_NODE (position);
+}
+
+static bool
+gl_array_remove_node (gl_list_t list, gl_list_node_t node)
+{
+  size_t count = list->count;
+  uintptr_t index = NODE_TO_INDEX (node);
+  size_t position;
+  const void **elements;
+  size_t i;
+
+  if (!(index < count))
+    /* Invalid argument.  */
+    abort ();
+  position = index;
+  elements = list->elements;
+  if (list->base.dispose_fn != NULL)
+    list->base.dispose_fn (elements[position]);
+  for (i = position + 1; i < count; i++)
+    elements[i - 1] = elements[i];
+  list->count = count - 1;
+  return true;
+}
+
+static bool
+gl_array_remove_at (gl_list_t list, size_t position)
+{
+  size_t count = list->count;
+  const void **elements;
+  size_t i;
+
+  if (!(position < count))
+    /* Invalid argument.  */
+    abort ();
+  elements = list->elements;
+  if (list->base.dispose_fn != NULL)
+    list->base.dispose_fn (elements[position]);
+  for (i = position + 1; i < count; i++)
+    elements[i - 1] = elements[i];
+  list->count = count - 1;
+  return true;
+}
+
+static bool
+gl_array_remove (gl_list_t list, const void *elt)
+{
+  size_t position = gl_array_indexof_from_to (list, 0, list->count, elt);
+  if (position == (size_t)(-1))
+    return false;
+  else
+    return gl_array_remove_at (list, position);
+}
+
+static void
+gl_array_list_free (gl_list_t list)
+{
+  if (list->elements != NULL)
+    {
+      if (list->base.dispose_fn != NULL)
+        {
+          size_t count = list->count;
+
+          if (count > 0)
+            {
+              gl_listelement_dispose_fn dispose = list->base.dispose_fn;
+              const void **elements = list->elements;
+
+              do
+                dispose (*elements++);
+              while (--count > 0);
+            }
+        }
+      free (list->elements);
+    }
+  free (list);
+}
+
+/* --------------------- gl_list_iterator_t Data Type --------------------- */
+
+static gl_list_iterator_t _GL_ATTRIBUTE_PURE
+gl_array_iterator (gl_list_t list)
+{
+  gl_list_iterator_t result;
+
+  result.vtable = list->base.vtable;
+  result.list = list;
+  result.count = list->count;
+  result.p = list->elements + 0;
+  result.q = list->elements + list->count;
+#if defined GCC_LINT || defined lint
+  result.i = 0;
+  result.j = 0;
+#endif
+
+  return result;
+}
+
+static gl_list_iterator_t _GL_ATTRIBUTE_PURE
+gl_array_iterator_from_to (gl_list_t list, size_t start_index, size_t end_index)
+{
+  gl_list_iterator_t result;
+
+  if (!(start_index <= end_index && end_index <= list->count))
+    /* Invalid arguments.  */
+    abort ();
+  result.vtable = list->base.vtable;
+  result.list = list;
+  result.count = list->count;
+  result.p = list->elements + start_index;
+  result.q = list->elements + end_index;
+#if defined GCC_LINT || defined lint
+  result.i = 0;
+  result.j = 0;
+#endif
+
+  return result;
+}
+
+static bool
+gl_array_iterator_next (gl_list_iterator_t *iterator,
+                        const void **eltp, gl_list_node_t *nodep)
+{
+  gl_list_t list = iterator->list;
+  if (iterator->count != list->count)
+    {
+      if (iterator->count != list->count + 1)
+        /* Concurrent modifications were done on the list.  */
+        abort ();
+      /* The last returned element was removed.  */
+      iterator->count--;
+      iterator->p = (const void **) iterator->p - 1;
+      iterator->q = (const void **) iterator->q - 1;
+    }
+  if (iterator->p < iterator->q)
+    {
+      const void **p = (const void **) iterator->p;
+      *eltp = *p;
+      if (nodep != NULL)
+        *nodep = INDEX_TO_NODE (p - list->elements);
+      iterator->p = p + 1;
+      return true;
+    }
+  else
+    return false;
+}
+
+static void
+gl_array_iterator_free (gl_list_iterator_t *iterator _GL_ATTRIBUTE_MAYBE_UNUSED)
+{
+}
+
+/* ---------------------- Sorted gl_list_t Data Type ---------------------- */
+
+static size_t _GL_ATTRIBUTE_PURE
+gl_array_sortedlist_indexof_from_to (gl_list_t list,
+                                     gl_listelement_compar_fn compar,
+                                     size_t low, size_t high,
+                                     const void *elt)
+{
+  if (!(low <= high && high <= list->count))
+    /* Invalid arguments.  */
+    abort ();
+  if (low < high)
+    {
+      /* At each loop iteration, low < high; for indices < low the values
+         are smaller than ELT; for indices >= high the values are greater
+         than ELT.  So, if the element occurs in the list, it is at
+         low <= position < high.  */
+      do
+        {
+          size_t mid = low + (high - low) / 2; /* low <= mid < high */
+          int cmp = compar (list->elements[mid], elt);
+
+          if (cmp < 0)
+            low = mid + 1;
+          else if (cmp > 0)
+            high = mid;
+          else /* cmp == 0 */
+            {
+              /* We have an element equal to ELT at index MID.  But we need
+                 the minimal such index.  */
+              high = mid;
+              /* At each loop iteration, low <= high and
+                   compar (list->elements[high], elt) == 0,
+                 and we know that the first occurrence of the element is at
+                 low <= position <= high.  */
+              while (low < high)
+                {
+                  size_t mid2 = low + (high - low) / 2; /* low <= mid2 < high */
+                  int cmp2 = compar (list->elements[mid2], elt);
+
+                  if (cmp2 < 0)
+                    low = mid2 + 1;
+                  else if (cmp2 > 0)
+                    /* The list was not sorted.  */
+                    abort ();
+                  else /* cmp2 == 0 */
+                    {
+                      if (mid2 == low)
+                        break;
+                      high = mid2 - 1;
+                    }
+                }
+              return low;
+            }
+        }
+      while (low < high);
+      /* Here low == high.  */
+    }
+  return (size_t)(-1);
+}
+
+static size_t _GL_ATTRIBUTE_PURE
+gl_array_sortedlist_indexof (gl_list_t list, gl_listelement_compar_fn compar,
+                             const void *elt)
+{
+  return gl_array_sortedlist_indexof_from_to (list, compar, 0, list->count,
+                                              elt);
+}
+
+static gl_list_node_t _GL_ATTRIBUTE_PURE
+gl_array_sortedlist_search_from_to (gl_list_t list,
+                                    gl_listelement_compar_fn compar,
+                                    size_t low, size_t high,
+                                    const void *elt)
+{
+  size_t index =
+    gl_array_sortedlist_indexof_from_to (list, compar, low, high, elt);
+  return INDEX_TO_NODE (index);
+}
+
+static gl_list_node_t _GL_ATTRIBUTE_PURE
+gl_array_sortedlist_search (gl_list_t list, gl_listelement_compar_fn compar,
+                            const void *elt)
+{
+  size_t index =
+    gl_array_sortedlist_indexof_from_to (list, compar, 0, list->count, elt);
+  return INDEX_TO_NODE (index);
+}
+
+static gl_list_node_t
+gl_array_sortedlist_nx_add (gl_list_t list, gl_listelement_compar_fn compar,
+                            const void *elt)
+{
+  size_t count = list->count;
+  size_t low = 0;
+  size_t high = count;
+
+  /* At each loop iteration, low <= high; for indices < low the values are
+     smaller than ELT; for indices >= high the values are greater than ELT.  */
+  while (low < high)
+    {
+      size_t mid = low + (high - low) / 2; /* low <= mid < high */
+      int cmp = compar (list->elements[mid], elt);
+
+      if (cmp < 0)
+        low = mid + 1;
+      else if (cmp > 0)
+        high = mid;
+      else /* cmp == 0 */
+        {
+          low = mid;
+          break;
+        }
+    }
+  return gl_array_nx_add_at (list, low, elt);
+}
+
+static bool
+gl_array_sortedlist_remove (gl_list_t list, gl_listelement_compar_fn compar,
+                            const void *elt)
+{
+  size_t index = gl_array_sortedlist_indexof (list, compar, elt);
+  if (index == (size_t)(-1))
+    return false;
+  else
+    return gl_array_remove_at (list, index);
+}
+
+
+const struct gl_list_implementation gl_array_list_implementation =
+  {
+    gl_array_nx_create_empty,
+    gl_array_nx_create,
+    gl_array_size,
+    gl_array_node_value,
+    gl_array_node_nx_set_value,
+    gl_array_next_node,
+    gl_array_previous_node,
+    gl_array_first_node,
+    gl_array_last_node,
+    gl_array_get_at,
+    gl_array_nx_set_at,
+    gl_array_search_from_to,
+    gl_array_indexof_from_to,
+    gl_array_nx_add_first,
+    gl_array_nx_add_last,
+    gl_array_nx_add_before,
+    gl_array_nx_add_after,
+    gl_array_nx_add_at,
+    gl_array_remove_node,
+    gl_array_remove_at,
+    gl_array_remove,
+    gl_array_list_free,
+    gl_array_iterator,
+    gl_array_iterator_from_to,
+    gl_array_iterator_next,
+    gl_array_iterator_free,
+    gl_array_sortedlist_search,
+    gl_array_sortedlist_search_from_to,
+    gl_array_sortedlist_indexof,
+    gl_array_sortedlist_indexof_from_to,
+    gl_array_sortedlist_nx_add,
+    gl_array_sortedlist_remove
+  };
diff --git a/src/gl/tests/gl_array_list.h b/src/gl/tests/gl_array_list.h
new file mode 100644
index 0000000..99b6bf1
--- /dev/null
+++ b/src/gl/tests/gl_array_list.h
@@ -0,0 +1,34 @@
+/* Sequential list data type implemented by an array.
+   Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2006.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_ARRAY_LIST_H
+#define _GL_ARRAY_LIST_H
+
+#include "gl_list.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern const struct gl_list_implementation gl_array_list_implementation;
+#define GL_ARRAY_LIST &gl_array_list_implementation
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _GL_ARRAY_LIST_H */
diff --git a/src/gl/tests/glthread/thread.c b/src/gl/tests/glthread/thread.c
new file mode 100644
index 0000000..12ff5bb
--- /dev/null
+++ b/src/gl/tests/glthread/thread.c
@@ -0,0 +1,205 @@
+/* Creating and controlling threads.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-win32.h.  */
+
+#include <config.h>
+
+/* Specification.  */
+# define _GLTHREAD_THREAD_INLINE _GL_EXTERN_INLINE
+#include "glthread/thread.h"
+
+#include <stdlib.h>
+#include "glthread/lock.h"
+
+/* ========================================================================= */
+
+#if USE_ISOC_THREADS
+
+struct thrd_with_exitvalue
+{
+  thrd_t volatile tid;
+  void * volatile exitvalue;
+};
+
+/* The Thread-Specific Storage (TSS) key that allows to access each thread's
+   'struct thrd_with_exitvalue *' pointer.  */
+static tss_t thrd_with_exitvalue_key;
+
+/* Initializes thrd_with_exitvalue_key.
+   This function must only be called once.  */
+static void
+do_init_thrd_with_exitvalue_key (void)
+{
+  if (tss_create (&thrd_with_exitvalue_key, NULL) != thrd_success)
+    abort ();
+}
+
+/* Initializes thrd_with_exitvalue_key.  */
+static void
+init_thrd_with_exitvalue_key (void)
+{
+  static once_flag once = ONCE_FLAG_INIT;
+  call_once (&once, do_init_thrd_with_exitvalue_key);
+}
+
+typedef union
+        {
+          struct thrd_with_exitvalue t;
+          struct
+          {
+            thrd_t tid; /* reserve memory for t.tid */
+            void *(*mainfunc) (void *);
+            void *arg;
+          } a;
+        }
+        main_arg_t;
+
+static int
+thrd_main_func (void *pmarg)
+{
+  /* Unpack the object that combines mainfunc and arg.  */
+  main_arg_t *main_arg = (main_arg_t *) pmarg;
+  void *(*mainfunc) (void *) = main_arg->a.mainfunc;
+  void *arg = main_arg->a.arg;
+
+  if (tss_set (thrd_with_exitvalue_key, &main_arg->t) != thrd_success)
+    abort ();
+
+  /* Execute mainfunc, with arg as argument.  */
+  {
+    void *exitvalue = mainfunc (arg);
+    /* Store the exitvalue, for use by glthread_join().  */
+    main_arg->t.exitvalue = exitvalue;
+    return 0;
+  }
+}
+
+int
+glthread_create (gl_thread_t *threadp, void *(*mainfunc) (void *), void *arg)
+{
+  init_thrd_with_exitvalue_key ();
+  {
+    /* Combine mainfunc and arg in a single object.
+       A stack-allocated object does not work, because it would be out of
+       existence when thrd_create returns before thrd_main_func is
+       entered.  So, allocate it in the heap.  */
+    main_arg_t *main_arg = (main_arg_t *) malloc (sizeof (main_arg_t));
+    if (main_arg == NULL)
+      return ENOMEM;
+    main_arg->a.mainfunc = mainfunc;
+    main_arg->a.arg = arg;
+    switch (thrd_create ((thrd_t *) &main_arg->t.tid, thrd_main_func, main_arg))
+      {
+      case thrd_success:
+        break;
+      case thrd_nomem:
+        free (main_arg);
+        return ENOMEM;
+      default:
+        free (main_arg);
+        return EAGAIN;
+      }
+    *threadp = &main_arg->t;
+    return 0;
+  }
+}
+
+gl_thread_t
+gl_thread_self (void)
+{
+  init_thrd_with_exitvalue_key ();
+  {
+    gl_thread_t thread =
+      (struct thrd_with_exitvalue *) tss_get (thrd_with_exitvalue_key);
+    if (thread == NULL)
+      {
+        /* This happens only in threads that have not been created through
+           glthread_create(), such as the main thread.  */
+        for (;;)
+          {
+            thread =
+              (struct thrd_with_exitvalue *)
+              malloc (sizeof (struct thrd_with_exitvalue));
+            if (thread != NULL)
+              break;
+            /* Memory allocation failed.  There is not much we can do.  Have to
+               busy-loop, waiting for the availability of memory.  */
+            {
+              struct timespec ts;
+              ts.tv_sec = 1;
+              ts.tv_nsec = 0;
+              thrd_sleep (&ts, NULL);
+            }
+          }
+        thread->tid = thrd_current ();
+        thread->exitvalue = NULL; /* just to be deterministic */
+        if (tss_set (thrd_with_exitvalue_key, thread) != thrd_success)
+          abort ();
+      }
+    return thread;
+  }
+}
+
+int
+glthread_join (gl_thread_t thread, void **return_value_ptr)
+{
+  /* On Solaris 11.4, thrd_join crashes when the second argument we pass is
+     NULL.  */
+  int dummy;
+
+  if (thread == gl_thread_self ())
+    return EINVAL;
+  if (thrd_join (thread->tid, &dummy) != thrd_success)
+    return EINVAL;
+  if (return_value_ptr != NULL)
+    *return_value_ptr = thread->exitvalue;
+  free (thread);
+  return 0;
+}
+
+_Noreturn void
+gl_thread_exit (void *return_value)
+{
+  gl_thread_t thread = gl_thread_self ();
+  thread->exitvalue = return_value;
+  thrd_exit (0);
+}
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+#include <pthread.h>
+
+#if defined PTW32_VERSION || defined __MVS__
+
+const gl_thread_t gl_null_thread /* = { .p = NULL } */;
+
+#endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WINDOWS_THREADS
+
+#endif
+
+/* ========================================================================= */
diff --git a/src/gl/tests/glthread/thread.h b/src/gl/tests/glthread/thread.h
new file mode 100644
index 0000000..b2e858b
--- /dev/null
+++ b/src/gl/tests/glthread/thread.h
@@ -0,0 +1,356 @@
+/* Creating and controlling threads.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-win32.h.  */
+
+/* This file contains primitives for creating and controlling threads.
+
+   Thread data type: gl_thread_t.
+
+   Creating a thread:
+       thread = gl_thread_create (func, arg);
+   Or with control of error handling:
+       err = glthread_create (&thread, func, arg);
+       extern int glthread_create (gl_thread_t *result,
+                                   void *(*func) (void *), void *arg);
+
+   Querying and changing the signal mask of a thread (not supported on all
+   platforms):
+       gl_thread_sigmask (how, newmask, oldmask);
+   Or with control of error handling:
+       err = glthread_sigmask (how, newmask, oldmask);
+       extern int glthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask);
+
+   Waiting for termination of another thread:
+       gl_thread_join (thread, &return_value);
+   Or with control of error handling:
+       err = glthread_join (thread, &return_value);
+       extern int glthread_join (gl_thread_t thread, void **return_value_ptr);
+
+   Getting a reference to the current thread:
+       current = gl_thread_self ();
+       extern gl_thread_t gl_thread_self (void);
+
+   Getting a reference to the current thread as a pointer, for debugging:
+       ptr = gl_thread_self_pointer ();
+       extern void * gl_thread_self_pointer (void);
+
+   Terminating the current thread:
+       gl_thread_exit (return_value);
+       extern _Noreturn void gl_thread_exit (void *return_value);
+
+   Requesting custom code to be executed at fork() time (not supported on all
+   platforms):
+       gl_thread_atfork (prepare_func, parent_func, child_func);
+   Or with control of error handling:
+       err = glthread_atfork (prepare_func, parent_func, child_func);
+       extern int glthread_atfork (void (*prepare_func) (void),
+                                   void (*parent_func) (void),
+                                   void (*child_func) (void));
+   Note that even on platforms where this is supported, use of fork() and
+   threads together is problematic, see
+     <https://lists.gnu.org/r/bug-gnulib/2008-08/msg00062.html>
+ */
+
+
+#ifndef _GLTHREAD_THREAD_H
+#define _GLTHREAD_THREAD_H
+
+#include <errno.h>
+#include <stdlib.h>
+
+#if !defined c11_threads_in_use
+# if HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
+#  include <threads.h>
+#  pragma weak thrd_exit
+#  define c11_threads_in_use() (thrd_exit != NULL)
+# else
+#  define c11_threads_in_use() 0
+# endif
+#endif
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef _GLTHREAD_THREAD_INLINE
+# define _GLTHREAD_THREAD_INLINE _GL_INLINE
+#endif
+
+/* ========================================================================= */
+
+#if USE_ISOC_THREADS
+
+/* Use the ISO C threads library.  */
+
+# include <threads.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/* -------------------------- gl_thread_t datatype -------------------------- */
+
+typedef struct thrd_with_exitvalue *gl_thread_t;
+extern int glthread_create (gl_thread_t *threadp,
+                            void *(*func) (void *), void *arg);
+# define glthread_sigmask(HOW, SET, OSET) \
+    pthread_sigmask (HOW, SET, OSET)
+extern int glthread_join (gl_thread_t thread, void **return_value_ptr);
+extern gl_thread_t gl_thread_self (void);
+# define gl_thread_self_pointer() \
+    (void *) gl_thread_self ()
+extern _Noreturn void gl_thread_exit (void *return_value);
+# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+/* Use the POSIX threads library.  */
+
+# include <pthread.h>
+
+/* On IRIX, pthread_atfork is declared in <unistd.h>, not in <pthread.h>.  */
+# if defined __sgi
+#  include <unistd.h>
+# endif
+
+# if USE_POSIX_THREADS_WEAK
+/* Compilers other than GCC need to see the declaration of pthread_sigmask
+   before the "#pragma weak pthread_sigmask" below.  */
+#  include <signal.h>
+# endif
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# if PTHREAD_IN_USE_DETECTION_HARD
+
+/* The pthread_in_use() detection needs to be done at runtime.  */
+#  define pthread_in_use() \
+     glthread_in_use ()
+extern int glthread_in_use (void);
+
+# endif
+
+# if USE_POSIX_THREADS_WEAK
+
+/* Use weak references to the POSIX threads library.  */
+
+/* Weak references avoid dragging in external libraries if the other parts
+   of the program don't use them.  Here we use them, because we don't want
+   every program that uses libintl to depend on libpthread.  This assumes
+   that libpthread would not be loaded after libintl; i.e. if libintl is
+   loaded first, by an executable that does not depend on libpthread, and
+   then a module is dynamically loaded that depends on libpthread, libintl
+   will not be multithread-safe.  */
+
+/* The way to test at runtime whether libpthread is present is to test
+   whether a function pointer's value, such as &pthread_mutex_init, is
+   non-NULL.  However, some versions of GCC have a bug through which, in
+   PIC mode, &foo != NULL always evaluates to true if there is a direct
+   call to foo(...) in the same function.  To avoid this, we test the
+   address of a function in libpthread that we don't use.  */
+
+#  ifndef pthread_sigmask /* Do not declare rpl_pthread_sigmask weak.  */
+#   pragma weak pthread_sigmask
+#  endif
+
+#  pragma weak pthread_join
+#  ifndef pthread_self
+#   pragma weak pthread_self
+#  endif
+#  pragma weak pthread_exit
+#  if HAVE_PTHREAD_ATFORK
+#   pragma weak pthread_atfork
+#  endif
+
+#  if !PTHREAD_IN_USE_DETECTION_HARD
+#   pragma weak pthread_mutexattr_gettype
+#   define pthread_in_use() \
+      (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
+#  endif
+
+# else
+
+#  if !PTHREAD_IN_USE_DETECTION_HARD
+#   define pthread_in_use() 1
+#  endif
+
+# endif
+
+/* -------------------------- gl_thread_t datatype -------------------------- */
+
+/* This choice of gl_thread_t assumes that
+     pthread_equal (a, b)  is equivalent to  ((a) == (b)).
+   This is the case on all platforms in use in 2008.  */
+typedef pthread_t gl_thread_t;
+# define glthread_create(THREADP, FUNC, ARG) \
+    (pthread_in_use () ? pthread_create (THREADP, NULL, FUNC, ARG) : ENOSYS)
+# define glthread_sigmask(HOW, SET, OSET) \
+    (pthread_in_use () ? pthread_sigmask (HOW, SET, OSET) : 0)
+# define glthread_join(THREAD, RETVALP) \
+    (pthread_in_use () ? pthread_join (THREAD, RETVALP) : 0)
+# ifdef PTW32_VERSION
+   /* In pthreads-win32, pthread_t is a struct with a pointer field 'p' and
+      other fields.  */
+#  define gl_thread_self() \
+     (pthread_in_use () ? pthread_self () : gl_null_thread)
+#  define gl_thread_self_pointer() \
+     (pthread_in_use () ? pthread_self ().p : NULL)
+extern const gl_thread_t gl_null_thread;
+# elif defined __MVS__
+   /* On IBM z/OS, pthread_t is a struct with an 8-byte '__' field.
+      The first three bytes of this field appear to uniquely identify a
+      pthread_t, though not necessarily representing a pointer.  */
+#  define gl_thread_self() \
+     (pthread_in_use () ? pthread_self () : gl_null_thread)
+#  define gl_thread_self_pointer() \
+     (pthread_in_use () ? *((void **) pthread_self ().__) : NULL)
+extern const gl_thread_t gl_null_thread;
+# else
+#  define gl_thread_self() \
+     (pthread_in_use () ? pthread_self () : (pthread_t) 0)
+#  define gl_thread_self_pointer() \
+     (pthread_in_use () ? (void *) pthread_self () : NULL)
+# endif
+# define gl_thread_exit(RETVAL) \
+    (void) (pthread_in_use () ? (pthread_exit (RETVAL), 0) : 0)
+
+# if HAVE_PTHREAD_ATFORK
+#  define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) \
+     (pthread_in_use () ? pthread_atfork (PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) : 0)
+# else
+#  define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
+# endif
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WINDOWS_THREADS
+
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+
+# include "windows-thread.h"
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/* -------------------------- gl_thread_t datatype -------------------------- */
+
+typedef glwthread_thread_t gl_thread_t;
+# define glthread_create(THREADP, FUNC, ARG) \
+    glwthread_thread_create (THREADP, 0, FUNC, ARG)
+# define glthread_sigmask(HOW, SET, OSET) \
+    /* unsupported */ 0
+# define glthread_join(THREAD, RETVALP) \
+    glwthread_thread_join (THREAD, RETVALP)
+# define gl_thread_self() \
+    glwthread_thread_self ()
+# define gl_thread_self_pointer() \
+    gl_thread_self ()
+# define gl_thread_exit(RETVAL) \
+    glwthread_thread_exit (RETVAL)
+# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if !(USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS)
+
+/* Provide dummy implementation if threads are not supported.  */
+
+typedef int gl_thread_t;
+# define glthread_create(THREADP, FUNC, ARG) ENOSYS
+# define glthread_sigmask(HOW, SET, OSET) 0
+# define glthread_join(THREAD, RETVALP) 0
+# define gl_thread_self() 0
+# define gl_thread_self_pointer() \
+    ((void *) gl_thread_self ())
+# define gl_thread_exit(RETVAL) (void)0
+# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
+
+#endif
+
+/* ========================================================================= */
+
+/* Macros with built-in error handling.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+_GLTHREAD_THREAD_INLINE gl_thread_t
+gl_thread_create (void *(*func) (void *arg), void *arg)
+{
+  gl_thread_t thread;
+  int ret;
+
+  ret = glthread_create (&thread, func, arg);
+  if (ret != 0)
+    abort ();
+  return thread;
+}
+#define gl_thread_sigmask(HOW, SET, OSET)     \
+   do                                         \
+     {                                        \
+       if (glthread_sigmask (HOW, SET, OSET)) \
+         abort ();                            \
+     }                                        \
+   while (0)
+#define gl_thread_join(THREAD, RETVAL)     \
+   do                                      \
+     {                                     \
+       if (glthread_join (THREAD, RETVAL)) \
+         abort ();                         \
+     }                                     \
+   while (0)
+#define gl_thread_atfork(PREPARE, PARENT, CHILD)     \
+   do                                                \
+     {                                               \
+       if (glthread_atfork (PREPARE, PARENT, CHILD)) \
+         abort ();                                   \
+     }                                               \
+   while (0)
+
+#ifdef __cplusplus
+}
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif /* _GLTHREAD_THREAD_H */
diff --git a/src/gl/tests/glthread/yield.h b/src/gl/tests/glthread/yield.h
new file mode 100644
index 0000000..bde0782
--- /dev/null
+++ b/src/gl/tests/glthread/yield.h
@@ -0,0 +1,100 @@
+/* Yielding the processor to other threads and processes.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* This file contains a primitive for yielding the processor to other threads.
+     extern void gl_thread_yield (void);
+ */
+
+#ifndef _GLTHREAD_YIELD_H
+#define _GLTHREAD_YIELD_H
+
+#include <errno.h>
+
+/* ========================================================================= */
+
+#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+/* Use the ISO C threads library.  */
+
+# include <threads.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# define gl_thread_yield() \
+    thrd_yield ()
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_POSIX_THREADS
+
+/* Use the POSIX threads library.  */
+
+# include <sched.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# define gl_thread_yield() \
+    sched_yield ()
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if USE_WINDOWS_THREADS
+
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+# define gl_thread_yield() \
+    Sleep (0)
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+
+/* ========================================================================= */
+
+#if !(USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS)
+
+/* Provide dummy implementation if threads are not supported.  */
+
+# define gl_thread_yield() 0
+
+#endif
+
+/* ========================================================================= */
+
+#endif /* _GLTHREAD_YIELD_H */
diff --git a/src/gl/tests/hash-pjw.c b/src/gl/tests/hash-pjw.c
new file mode 100644
index 0000000..f725db0
--- /dev/null
+++ b/src/gl/tests/hash-pjw.c
@@ -0,0 +1,40 @@
+/* hash-pjw.c -- compute a hash value from a NUL-terminated string.
+
+   Copyright (C) 2001, 2003, 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "hash-pjw.h"
+
+#include <limits.h>
+
+#define SIZE_BITS (sizeof (size_t) * CHAR_BIT)
+
+/* A hash function for NUL-terminated char* strings using
+   the method described by Bruno Haible.
+   See https://www.haible.de/bruno/hashfunc.html.  */
+
+size_t
+hash_pjw (const void *x, size_t tablesize)
+{
+  const char *s;
+  size_t h = 0;
+
+  for (s = x; *s; s++)
+    h = *s + ((h << 9) | (h >> (SIZE_BITS - 9)));
+
+  return h % tablesize;
+}
diff --git a/src/gl/tests/hash-pjw.h b/src/gl/tests/hash-pjw.h
new file mode 100644
index 0000000..c8a911f
--- /dev/null
+++ b/src/gl/tests/hash-pjw.h
@@ -0,0 +1,23 @@
+/* hash-pjw.h -- declaration for a simple hash function
+   Copyright (C) 2001, 2003, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stddef.h>
+
+/* Compute a hash code for a NUL-terminated string starting at X,
+   and return the hash code modulo TABLESIZE.
+   The result is platform dependent: it depends on the size of the 'size_t'
+   type and on the signedness of the 'char' type.  */
+extern size_t hash_pjw (void const *x, size_t tablesize) _GL_ATTRIBUTE_PURE;
diff --git a/src/gl/tests/ignore-value.h b/src/gl/tests/ignore-value.h
new file mode 100644
index 0000000..0a3cf1e
--- /dev/null
+++ b/src/gl/tests/ignore-value.h
@@ -0,0 +1,51 @@
+/* ignore a function return without a compiler warning.  -*- coding: utf-8 -*-
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering, Eric Blake and Pádraig Brady.  */
+
+/* Use "ignore_value" to avoid a warning when using a function declared with
+   gcc's warn_unused_result attribute, but for which you really do want to
+   ignore the result.  Traditionally, people have used a "(void)" cast to
+   indicate that a function's return value is deliberately unused.  However,
+   if the function is declared with __attribute__((warn_unused_result)),
+   gcc issues a warning even with the cast.
+
+   Caution: most of the time, you really should heed gcc's warning, and
+   check the return value.  However, in those exceptional cases in which
+   you're sure you know what you're doing, use this function.
+
+   For the record, here's one of the ignorable warnings:
+   "copy.c:233: warning: ignoring return value of 'fchown',
+   declared with attribute warn_unused_result".  */
+
+#ifndef _GL_IGNORE_VALUE_H
+#define _GL_IGNORE_VALUE_H
+
+/* Normally casting an expression to void discards its value, but GCC
+   versions 3.4 and newer have __attribute__ ((__warn_unused_result__))
+   which may cause unwanted diagnostics in that case.  Use __typeof__
+   and __extension__ to work around the problem, if the workaround is
+   known to be needed.
+   The workaround is not needed with clang.  */
+#if (3 < __GNUC__ + (4 <= __GNUC_MINOR__)) && !defined __clang__
+# define ignore_value(x) \
+    (__extension__ ({ __typeof__ (x) __x = (x); (void) __x; }))
+#else
+# define ignore_value(x) ((void) (x))
+#endif
+
+#endif
diff --git a/src/gl/tests/imaxtostr.c b/src/gl/tests/imaxtostr.c
new file mode 100644
index 0000000..b91ac98
--- /dev/null
+++ b/src/gl/tests/imaxtostr.c
@@ -0,0 +1,3 @@
+#define anytostr imaxtostr
+#define inttype intmax_t
+#include "anytostr.c"
diff --git a/src/gl/tests/init.sh b/src/gl/tests/init.sh
new file mode 100644
index 0000000..9ef8348
--- /dev/null
+++ b/src/gl/tests/init.sh
@@ -0,0 +1,683 @@
+# source this file; set up for tests
+
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Using this file in a test
+# =========================
+#
+# The typical skeleton of a test looks like this:
+#
+#   #!/bin/sh
+#   . "${srcdir=.}/init.sh"; path_prepend_ .
+#   Execute some commands.
+#   Note that these commands are executed in a subdirectory, therefore you
+#   need to prepend "../" to relative filenames in the build directory.
+#   Note that the "path_prepend_ ." is useful only if the body of your
+#   test invokes programs residing in the initial directory.
+#   For example, if the programs you want to test are in src/, and this test
+#   script is named tests/test-1, then you would use "path_prepend_ ../src",
+#   or perhaps export PATH='$(abs_top_builddir)/src$(PATH_SEPARATOR)'"$$PATH"
+#   to all tests via automake's TESTS_ENVIRONMENT.
+#   Set the exit code 0 for success, 77 for skipped, or 1 or other for failure.
+#   Use the skip_ and fail_ functions to print a diagnostic and then exit
+#   with the corresponding exit code.
+#   Exit $?
+
+# Executing a test that uses this file
+# ====================================
+#
+# Running a single test:
+#   $ make check TESTS=test-foo.sh
+#
+# Running a single test, with verbose output:
+#   $ make check TESTS=test-foo.sh VERBOSE=yes
+#
+# Running a single test, keeping the temporary directory:
+#   $ make check TESTS=test-foo.sh KEEP=yes
+#
+# Running a single test, with single-stepping:
+#   1. Go into a sub-shell:
+#   $ bash
+#   2. Set relevant environment variables from TESTS_ENVIRONMENT in the
+#      Makefile:
+#   $ export srcdir=../../tests # this is an example
+#   3. Execute the commands from the test, copy&pasting them one by one:
+#   $ . "$srcdir/init.sh"; path_prepend_ .
+#   ...
+#   4. Finally
+#   $ exit
+
+# =============================================================================
+# Elementary diagnostics
+
+ME_=`expr "./$0" : '.*/\(.*\)$'`
+
+# Prepare PATH_SEPARATOR.
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
+  # contains only /bin. Note that ksh looks also at the FPATH variable,
+  # so we have to set that as well for the test.
+  PATH_SEPARATOR=:
+  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+    && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
+           || PATH_SEPARATOR=';'
+       }
+fi
+
+# We use a trap below for cleanup.  This requires us to go through
+# hoops to get the right exit status transported through the handler.
+# So use 'Exit STATUS' instead of 'exit STATUS' inside of the tests.
+# Turn off errexit here so that we don't trip the bug with OSF1/Tru64
+# sh inside this function.
+Exit () { set +e; (exit $1); exit $1; }
+
+# Print warnings (e.g., about skipped and failed tests) to this file number.
+# Override by defining to say, 9, in init.cfg, and putting say,
+#   export ...ENVVAR_SETTINGS...; $(SHELL) 9>&2
+# in the definition of TESTS_ENVIRONMENT in your tests/Makefile.am file.
+# This is useful when using automake's parallel tests mode, to print
+# the reason for skip/failure to console, rather than to the .log files.
+: ${stderr_fileno_=2}
+
+# Note that correct expansion of "$*" depends on IFS starting with ' '.
+# Always write the full diagnostic to stderr.
+# When stderr_fileno_ is not 2, also emit the first line of the
+# diagnostic to that file descriptor.
+warn_ ()
+{
+  # If IFS does not start with ' ', set it and emit the warning in a subshell.
+  case $IFS in
+    ' '*) printf '%s\n' "$*" >&2
+          test $stderr_fileno_ = 2 \
+            || { printf '%s\n' "$*" | sed 1q >&$stderr_fileno_ ; } ;;
+    *) (IFS=' '; warn_ "$@");;
+  esac
+}
+fail_ () { warn_ "$ME_: failed test: $@"; Exit 1; }
+skip_ () { warn_ "$ME_: skipped test: $@"; Exit 77; }
+fatal_ () { warn_ "$ME_: hard error: $@"; Exit 99; }
+framework_failure_ () { warn_ "$ME_: set-up failure: $@"; Exit 99; }
+
+# =============================================================================
+# Ensure the shell supports modern syntax.
+
+# Sanitize this shell to POSIX mode, if possible.
+DUALCASE=1; export DUALCASE
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  alias -g '${1+"$@"}'='"$@"'
+  setopt NO_GLOB_SUBST
+else
+  case `(set -o) 2>/dev/null` in
+    *posix*) set -o posix ;;
+  esac
+fi
+
+# We require $(...) support unconditionally.
+# We require that the printf built-in work correctly regarding octal escapes;
+# this eliminates /bin/sh on AIX 7.2.
+# We require non-surprising "local" semantics (this eliminates dash).
+# This takes the admittedly draconian step of eliminating dash, because the
+# assignment tab=$(printf '\t') works fine, yet preceding it with "local "
+# transforms it into an assignment that sets the variable to the empty string.
+# That is too counter-intuitive, and can lead to subtle run-time malfunction.
+# The example below is less subtle in that with dash, it evokes the run-time
+# exception "dash: 1: local: 1: bad variable name".
+# We require a few additional shell features only when $EXEEXT is nonempty,
+# in order to support automatic $EXEEXT emulation:
+# - hyphen-containing alias names
+# - we prefer to use ${var#...} substitution, rather than having
+#   to work around lack of support for that feature.
+# The following code attempts to find a shell with support for these features.
+# If the current shell passes the test, we're done.  Otherwise, test other
+# shells until we find one that passes.  If one is found, re-exec it.
+# If no acceptable shell is found, skip the current test.
+#
+# The "...set -x; P=1 true 2>err..." test is to disqualify any shell that
+# emits "P=1" into err, as /bin/sh from SunOS 5.11 and OpenBSD 4.7 do.
+#
+# Use "9" to indicate success (rather than 0), in case some shell acts
+# like Solaris 10's /bin/sh but exits successfully instead of with status 2.
+
+# Eval this code in a subshell to determine a shell's suitability.
+# 10 - passes all tests; ok to use
+#  9 - ok, but enabling "set -x" corrupts app stderr; prefer higher score
+#  ? - not ok
+gl_shell_test_script_='
+test $(echo y) = y || exit 1
+LC_ALL=en_US.UTF-8 printf "\\351" 2>/dev/null \
+  | LC_ALL=C tr "\\351" x | LC_ALL=C grep "^x$" > /dev/null \
+  || exit 1
+printf "\\351" 2>/dev/null \
+  | LC_ALL=C tr "\\351" x | LC_ALL=C grep "^x$" > /dev/null \
+  || exit 1
+f_local_() { local v=1; }; f_local_ || exit 1
+f_dash_local_fail_() { local t=$(printf " 1"); }; f_dash_local_fail_
+score_=10
+if test "$VERBOSE" = yes; then
+  test -n "$( (exec 3>&1; set -x; P=1 true 2>&3) 2> /dev/null)" && score_=9
+fi
+test -z "$EXEEXT" && exit $score_
+shopt -s expand_aliases
+alias a-b="echo zoo"
+v=abx
+     test ${v%x} = ab \
+  && test ${v#a} = bx \
+  && test $(a-b) = zoo \
+  && exit $score_
+'
+
+if test "x$1" = "x--no-reexec"; then
+  shift
+else
+  # Assume a working shell.  Export to subshells (setup_ needs this).
+  gl_set_x_corrupts_stderr_=false
+  export gl_set_x_corrupts_stderr_
+
+  # Record the first marginally acceptable shell.
+  marginal_=
+
+  # Search for a shell that meets our requirements.
+  for re_shell_ in __current__ "${CONFIG_SHELL:-no_shell}" \
+      /bin/sh bash dash zsh pdksh fail
+  do
+    test "$re_shell_" = no_shell && continue
+
+    # If we've made it all the way to the sentinel, "fail" without
+    # finding even a marginal shell, skip this test.
+    if test "$re_shell_" = fail; then
+      test -z "$marginal_" && skip_ failed to find an adequate shell
+      re_shell_=$marginal_
+      break
+    fi
+
+    # When testing the current shell, simply "eval" the test code.
+    # Otherwise, run it via $re_shell_ -c ...
+    if test "$re_shell_" = __current__; then
+      # 'eval'ing this code makes Solaris 10's /bin/sh exit with
+      # $? set to 2.  It does not evaluate any of the code after the
+      # "unexpected" first '('.  Thus, we must run it in a subshell.
+      ( eval "$gl_shell_test_script_" ) > /dev/null 2>&1
+    else
+      "$re_shell_" -c "$gl_shell_test_script_" 2>/dev/null
+    fi
+
+    st_=$?
+
+    # $re_shell_ works just fine.  Use it.
+    if test $st_ = 10; then
+      gl_set_x_corrupts_stderr_=false
+      break
+    fi
+
+    # If this is our first marginally acceptable shell, remember it.
+    if test "$st_:$marginal_" = 9: ; then
+      marginal_="$re_shell_"
+      gl_set_x_corrupts_stderr_=true
+    fi
+  done
+
+  if test "$re_shell_" != __current__; then
+    # Found a usable shell.  Preserve -v and -x.
+    case $- in
+      *v*x* | *x*v*) opts_=-vx ;;
+      *v*) opts_=-v ;;
+      *x*) opts_=-x ;;
+      *) opts_= ;;
+    esac
+    re_shell=$re_shell_
+    export re_shell
+    exec "$re_shell_" $opts_ "$0" --no-reexec "$@"
+    echo "$ME_: exec failed" 1>&2
+    exit 127
+  fi
+fi
+
+# =============================================================================
+# Ensure the shell behaves reasonably.
+
+# If this is bash, turn off all aliases.
+test -n "$BASH_VERSION" && unalias -a
+
+# Note that when supporting $EXEEXT (transparently mapping from PROG_NAME to
+# PROG_NAME.exe), we want to support hyphen-containing names like test-acos.
+# That is part of the shell-selection test above.  Why use aliases rather
+# than functions?  Because support for hyphen-containing aliases is more
+# widespread than that for hyphen-containing function names.
+test -n "$EXEEXT" && test -n "$BASH_VERSION" && shopt -s expand_aliases
+
+# =============================================================================
+# Creating a temporary directory (needed by the core test framework)
+
+# Create a temporary directory, much like mktemp -d does.
+# Written by Jim Meyering.
+#
+# Usage: mktempd_ /tmp phoey.XXXXXXXXXX
+#
+# First, try to use the mktemp program.
+# Failing that, we'll roll our own mktemp-like function:
+#  - try to get random bytes from /dev/urandom
+#  - failing that, generate output from a combination of quickly-varying
+#      sources and gzip.  Ignore non-varying gzip header, and extract
+#      "random" bits from there.
+#  - given those bits, map to file-name bytes using tr, and try to create
+#      the desired directory.
+#  - make only $MAX_TRIES_ attempts
+
+# Helper function.  Print $N pseudo-random bytes from a-zA-Z0-9.
+rand_bytes_ ()
+{
+  n_=$1
+
+  # Maybe try openssl rand -base64 $n_prime_|tr '+/=\012' abcd first?
+  # But if they have openssl, they probably have mktemp, too.
+
+  chars_=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
+  dev_rand_=/dev/urandom
+  if test -r "$dev_rand_"; then
+    # Note: 256-length($chars_) == 194; 3 copies of $chars_ is 186 + 8 = 194.
+    dd ibs=$n_ count=1 if=$dev_rand_ 2>/dev/null \
+      | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
+    return
+  fi
+
+  n_plus_50_=`expr $n_ + 50`
+  cmds_='date; date +%N; free; who -a; w; ps auxww; ps -ef'
+  data_=` (eval "$cmds_") 2>&1 | gzip `
+
+  # Ensure that $data_ has length at least 50+$n_
+  while :; do
+    len_=`echo "$data_"|wc -c`
+    test $n_plus_50_ -le $len_ && break;
+    data_=` (echo "$data_"; eval "$cmds_") 2>&1 | gzip `
+  done
+
+  echo "$data_" \
+    | dd bs=1 skip=50 count=$n_ 2>/dev/null \
+    | LC_ALL=C tr -c $chars_ 01234567$chars_$chars_$chars_
+}
+
+mktempd_ ()
+{
+  case $# in
+  2);;
+  *) fail_ "Usage: mktempd_ DIR TEMPLATE";;
+  esac
+
+  destdir_=$1
+  template_=$2
+
+  MAX_TRIES_=4
+
+  # Disallow any trailing slash on specified destdir:
+  # it would subvert the post-mktemp "case"-based destdir test.
+  case $destdir_ in
+  / | //) destdir_slash_=$destdir;;
+  */) fail_ "invalid destination dir: remove trailing slash(es)";;
+  *) destdir_slash_=$destdir_/;;
+  esac
+
+  case $template_ in
+  *XXXX) ;;
+  *) fail_ \
+       "invalid template: $template_ (must have a suffix of at least 4 X's)";;
+  esac
+
+  # First, try to use mktemp.
+  d=`unset TMPDIR; { mktemp -d -t -p "$destdir_" "$template_"; } 2>/dev/null` &&
+
+  # The resulting name must be in the specified directory.
+  case $d in "$destdir_slash_"*) :;; *) false;; esac &&
+
+  # It must have created the directory.
+  test -d "$d" &&
+
+  # It must have 0700 permissions.  Handle sticky "S" bits.
+  perms=`ls -dgo "$d" 2>/dev/null` &&
+  case $perms in drwx--[-S]---*) :;; *) false;; esac && {
+    echo "$d"
+    return
+  }
+
+  # If we reach this point, we'll have to create a directory manually.
+
+  # Get a copy of the template without its suffix of X's.
+  base_template_=`echo "$template_"|sed 's/XX*$//'`
+
+  # Calculate how many X's we've just removed.
+  template_length_=`echo "$template_" | wc -c`
+  nx_=`echo "$base_template_" | wc -c`
+  nx_=`expr $template_length_ - $nx_`
+
+  err_=
+  i_=1
+  while :; do
+    X_=`rand_bytes_ $nx_`
+    candidate_dir_="$destdir_slash_$base_template_$X_"
+    err_=`mkdir -m 0700 "$candidate_dir_" 2>&1` \
+      && { echo "$candidate_dir_"; return; }
+    test $MAX_TRIES_ -le $i_ && break;
+    i_=`expr $i_ + 1`
+  done
+  fail_ "$err_"
+}
+
+# =============================================================================
+# Core test framework
+
+# An arbitrary prefix to help distinguish test directories.
+testdir_prefix_ () { printf gt; }
+
+# Set up the environment for the test to run in.
+setup_ ()
+{
+  if test "$VERBOSE" = yes; then
+    # Test whether set -x may cause the selected shell to corrupt an
+    # application's stderr.  Many do, including zsh-4.3.10 and the /bin/sh
+    # from SunOS 5.11, OpenBSD 4.7 and Irix 6.5.
+    # If enabling verbose output this way would cause trouble, simply
+    # issue a warning and refrain.
+    if $gl_set_x_corrupts_stderr_; then
+      warn_ "using SHELL=$SHELL with 'set -x' corrupts stderr"
+    else
+      set -x
+    fi
+  fi
+
+  initial_cwd_=$PWD
+
+  # Create and enter the temporary directory.
+  pfx_=`testdir_prefix_`
+  test_dir_=`mktempd_ "$initial_cwd_" "$pfx_-$ME_.XXXX"` \
+    || fail_ "failed to create temporary directory in $initial_cwd_"
+  cd "$test_dir_" || fail_ "failed to cd to temporary directory"
+  # Set variables srcdir, builddir, for the convenience of the test.
+  case $srcdir in
+    /* | ?:*) ;;
+    *) srcdir="../$srcdir" ;;
+  esac
+  builddir=".."
+  export srcdir builddir
+
+  # As autoconf-generated configure scripts do, ensure that IFS
+  # is defined initially, so that saving and restoring $IFS works.
+  gl_init_sh_nl_='
+'
+  IFS=" ""	$gl_init_sh_nl_"
+
+  # This trap statement, along with a trap on 0 below, ensure that the
+  # temporary directory, $test_dir_, is removed upon exit as well as
+  # upon receipt of any of the listed signals.
+  for sig_ in 1 2 3 13 15; do
+    eval "trap 'Exit $(expr $sig_ + 128)' $sig_"
+  done
+}
+
+# This is a stub function that is run upon trap (upon regular exit and
+# interrupt).  Override it with a per-test function, e.g., to unmount
+# a partition, or to undo any other global state changes.
+cleanup_ () { :; }
+
+# Run the user-overridable cleanup_ function, remove the temporary
+# directory and exit with the incoming value of $?.
+remove_tmp_ ()
+{
+  __st=$?
+  cleanup_
+  if test "$KEEP" = yes; then
+    echo "Not removing temporary directory $test_dir_"
+  else
+    # cd out of the directory we're about to remove
+    cd "$initial_cwd_" || cd / || cd /tmp
+    chmod -R u+rwx "$test_dir_"
+    # If removal fails and exit status was to be 0, then change it to 1.
+    rm -rf "$test_dir_" || { test $__st = 0 && __st=1; }
+  fi
+  exit $__st
+}
+
+# =============================================================================
+# Prepending directories to PATH
+
+# Given a directory name, DIR, if every entry in it that matches *.exe
+# contains only the specified bytes (see the case stmt below), then print
+# a space-separated list of those names and return 0.  Otherwise, don't
+# print anything and return 1.  Naming constraints apply also to DIR.
+find_exe_basenames_ ()
+{
+  feb_dir_=$1
+  feb_fail_=0
+  feb_result_=
+  feb_sp_=
+  for feb_file_ in $feb_dir_/*.exe; do
+    # If there was no *.exe file, or there existed a file named "*.exe" that
+    # was deleted between the above glob expansion and the existence test
+    # below, just skip it.
+    test "x$feb_file_" = "x$feb_dir_/*.exe" && test ! -f "$feb_file_" \
+      && continue
+    # Exempt [.exe, since we can't create a function by that name, yet
+    # we can't invoke [ by PATH search anyways due to shell builtins.
+    test "x$feb_file_" = "x$feb_dir_/[.exe" && continue
+    case $feb_file_ in
+      *[!-a-zA-Z/0-9_.+]*) feb_fail_=1; break;;
+      *) # Remove leading file name components as well as the .exe suffix.
+         feb_file_=${feb_file_##*/}
+         feb_file_=${feb_file_%.exe}
+         feb_result_="$feb_result_$feb_sp_$feb_file_";;
+    esac
+    feb_sp_=' '
+  done
+  test $feb_fail_ = 0 && printf %s "$feb_result_"
+  return $feb_fail_
+}
+
+# Consider the files in directory, $1.
+# For each file name of the form PROG.exe, create an alias named
+# PROG that simply invokes PROG.exe, then return 0.  If any selected
+# file name or the directory name, $1, contains an unexpected character,
+# define no alias and return 1.
+create_exe_shims_ ()
+{
+  case $EXEEXT in
+    '') return 0 ;;
+    .exe) ;;
+    *) echo "$0: unexpected \$EXEEXT value: $EXEEXT" 1>&2; return 1 ;;
+  esac
+
+  base_names_=`find_exe_basenames_ $1` \
+    || { echo "$0 (exe_shim): skipping directory: $1" 1>&2; return 0; }
+
+  if test -n "$base_names_"; then
+    for base_ in $base_names_; do
+      alias "$base_"="$base_$EXEEXT"
+    done
+  fi
+
+  return 0
+}
+
+# Use this function to prepend to PATH an absolute name for each
+# specified, possibly-$initial_cwd_-relative, directory.
+path_prepend_ ()
+{
+  while test $# != 0; do
+    path_dir_=$1
+    case $path_dir_ in
+      '') fail_ "invalid path dir: '$1'";;
+      /* | ?:*) abs_path_dir_=$path_dir_;;
+      *) abs_path_dir_=$initial_cwd_/$path_dir_;;
+    esac
+    case $abs_path_dir_ in
+      *$PATH_SEPARATOR*) fail_ "invalid path dir: '$abs_path_dir_'";;
+    esac
+    PATH="$abs_path_dir_$PATH_SEPARATOR$PATH"
+
+    # Create an alias, FOO, for each FOO.exe in this directory.
+    create_exe_shims_ "$abs_path_dir_" \
+      || fail_ "something failed (above): $abs_path_dir_"
+    shift
+  done
+  export PATH
+}
+
+# =============================================================================
+# Convenience environment variables for the tests
+
+# -----------------------------------------------------------------------------
+
+# Enable glibc's malloc-perturbing option.
+# This is useful for exposing code that depends on the fact that
+# malloc-related functions often return memory that is mostly zeroed.
+# If you have the time and cycles, use valgrind to do an even better job.
+: ${MALLOC_PERTURB_=87}
+export MALLOC_PERTURB_
+
+# -----------------------------------------------------------------------------
+
+# The interpreter for Bourne-shell scripts.
+# No special standards compatibility requirements.
+# Some environments, such as Android, don't have /bin/sh.
+if test -f /bin/sh$EXEEXT; then
+  BOURNE_SHELL=/bin/sh
+else
+  BOURNE_SHELL=sh
+fi
+
+# =============================================================================
+# Convenience functions for the tests
+
+# -----------------------------------------------------------------------------
+# Return value checking
+
+# This is used to simplify checking of the return value
+# which is useful when ensuring a command fails as desired.
+# I.e., just doing `command ... &&fail=1` will not catch
+# a segfault in command for example.  With this helper you
+# instead check an explicit exit code like
+#   returns_ 1 command ... || fail
+returns_ () {
+  # Disable tracing so it doesn't interfere with stderr of the wrapped command
+  { set +x; } 2>/dev/null
+
+  local exp_exit="$1"
+  shift
+  "$@"
+  test $? -eq $exp_exit && ret_=0 || ret_=1
+
+  if test "$VERBOSE" = yes && test "$gl_set_x_corrupts_stderr_" = false; then
+    set -x
+  fi
+  { return $ret_; } 2>/dev/null
+}
+
+# -----------------------------------------------------------------------------
+# Text file comparison
+
+# Emit a header similar to that from diff -u;  Print the simulated "diff"
+# command so that the order of arguments is clear.  Don't bother with @@ lines.
+emit_diff_u_header_ ()
+{
+  printf '%s\n' "diff -u $*" \
+    "--- $1	1970-01-01" \
+    "+++ $2	1970-01-01"
+}
+
+# Arrange not to let diff or cmp operate on /dev/null,
+# since on some systems (at least OSF/1 5.1), that doesn't work.
+# When there are not two arguments, or no argument is /dev/null, return 2.
+# When one argument is /dev/null and the other is not empty,
+# cat the nonempty file to stderr and return 1.
+# Otherwise, return 0.
+compare_dev_null_ ()
+{
+  test $# = 2 || return 2
+
+  if test "x$1" = x/dev/null; then
+    test -s "$2" || return 0
+    emit_diff_u_header_ "$@"; sed 's/^/+/' "$2"
+    return 1
+  fi
+
+  if test "x$2" = x/dev/null; then
+    test -s "$1" || return 0
+    emit_diff_u_header_ "$@"; sed 's/^/-/' "$1"
+    return 1
+  fi
+
+  return 2
+}
+
+for diff_opt_ in -u -U3 -c '' no; do
+  test "$diff_opt_" != no &&
+    diff_out_=`exec 2>/dev/null; diff $diff_opt_ "$0" "$0" < /dev/null` &&
+    break
+done
+if test "$diff_opt_" != no; then
+  if test -z "$diff_out_"; then
+    compare_ () { diff $diff_opt_ "$@"; }
+  else
+    compare_ ()
+    {
+      # If no differences were found, AIX and HP-UX 'diff' produce output
+      # like "No differences encountered".  Hide this output.
+      diff $diff_opt_ "$@" > diff.out
+      diff_status_=$?
+      test $diff_status_ -eq 0 || cat diff.out || diff_status_=2
+      rm -f diff.out || diff_status_=2
+      return $diff_status_
+    }
+  fi
+elif cmp -s /dev/null /dev/null 2>/dev/null; then
+  compare_ () { cmp -s "$@"; }
+else
+  compare_ () { cmp "$@"; }
+fi
+
+# Usage: compare EXPECTED ACTUAL
+#
+# Given compare_dev_null_'s preprocessing, defer to compare_ if 2 or more.
+# Otherwise, propagate $? to caller: any diffs have already been printed.
+compare ()
+{
+  # This looks like it can be factored to use a simple "case $?"
+  # after unchecked compare_dev_null_ invocation, but that would
+  # fail in a "set -e" environment.
+  if compare_dev_null_ "$@"; then
+    return 0
+  else
+    case $? in
+      1) return 1;;
+      *) compare_ "$@";;
+    esac
+  fi
+}
+
+# -----------------------------------------------------------------------------
+
+# If you want to override the testdir_prefix_ function,
+# or to add more utility functions, use this file.
+test -f "$srcdir/init.cfg" \
+  && . "$srcdir/init.cfg"
+
+# =============================================================================
+# Set up the environment for the test to run in.
+
+setup_ "$@"
+# This trap is here, rather than in the setup_ function, because some
+# shells run the exit trap at shell function exit, rather than script exit.
+trap remove_tmp_ 0
diff --git a/src/gl/tests/inttostr.c b/src/gl/tests/inttostr.c
new file mode 100644
index 0000000..c96b5ca
--- /dev/null
+++ b/src/gl/tests/inttostr.c
@@ -0,0 +1,3 @@
+#define anytostr inttostr
+#define inttype int
+#include "anytostr.c"
diff --git a/src/gl/tests/inttostr.h b/src/gl/tests/inttostr.h
new file mode 100644
index 0000000..8fc22aa
--- /dev/null
+++ b/src/gl/tests/inttostr.h
@@ -0,0 +1,29 @@
+/* inttostr.h -- convert integers to printable strings
+
+   Copyright (C) 2001-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert */
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include "intprops.h"
+
+char *imaxtostr (intmax_t, char *) _GL_ATTRIBUTE_NODISCARD;
+char *inttostr (int, char *) _GL_ATTRIBUTE_NODISCARD;
+char *offtostr (off_t, char *) _GL_ATTRIBUTE_NODISCARD;
+char *uinttostr (unsigned int, char *) _GL_ATTRIBUTE_NODISCARD;
+char *umaxtostr (uintmax_t, char *) _GL_ATTRIBUTE_NODISCARD;
diff --git a/src/gl/tests/ioctl.c b/src/gl/tests/ioctl.c
new file mode 100644
index 0000000..5c5e7a4
--- /dev/null
+++ b/src/gl/tests/ioctl.c
@@ -0,0 +1,92 @@
+/* ioctl.c --- wrappers for Windows ioctl function
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <config.h>
+
+#include <sys/ioctl.h>
+
+#include <stdarg.h>
+
+#if HAVE_IOCTL
+
+/* Provide a wrapper with the POSIX prototype.  */
+# undef ioctl
+int
+rpl_ioctl (int fd, int request, ... /* {void *,char *} arg */)
+{
+  void *buf;
+  va_list args;
+
+  va_start (args, request);
+  buf = va_arg (args, void *);
+  va_end (args);
+
+  /* Cast 'request' so that when the system's ioctl function takes a 64-bit
+     request argument, the value gets zero-extended, not sign-extended.  */
+  return ioctl (fd, (unsigned int) request, buf);
+}
+
+#else /* mingw */
+
+# include <errno.h>
+
+/* Get HANDLE.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+
+# include "fd-hook.h"
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+
+static int
+primary_ioctl (int fd, int request, void *arg)
+{
+  /* We don't support FIONBIO on pipes here.  If you want to make pipe
+     fds non-blocking, use the gnulib 'nonblocking' module, until
+     gnulib implements fcntl F_GETFL / F_SETFL with O_NONBLOCK.  */
+
+  if ((HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE)
+    errno = ENOSYS;
+  else
+    errno = EBADF;
+  return -1;
+}
+
+int
+ioctl (int fd, int request, ... /* {void *,char *} arg */)
+{
+  void *arg;
+  va_list args;
+
+  va_start (args, request);
+  arg = va_arg (args, void *);
+  va_end (args);
+
+# if WINDOWS_SOCKETS
+  return execute_all_ioctl_hooks (primary_ioctl, fd, request, arg);
+# else
+  return primary_ioctl (fd, request, arg);
+# endif
+}
+
+#endif
diff --git a/src/gl/tests/isblank.c b/src/gl/tests/isblank.c
new file mode 100644
index 0000000..44a9a20
--- /dev/null
+++ b/src/gl/tests/isblank.c
@@ -0,0 +1,33 @@
+/* Test whether a character is a blank.
+
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <ctype.h>
+
+int
+isblank (int c)
+{
+  /* On all known platforms, in all predefined locales, isblank(c) is likely
+     equivalent with  (c == ' ' || c == '\t').  Look at the glibc definition
+     (in glibc/localedata/locales/i18n): The "blank" characters are '\t', ' ',
+     U+1680, U+180E, U+2000..U+2006, U+2008..U+200A, U+205F, U+3000, and none
+     except the first two is present in a common 8-bit encoding.  Therefore
+     the substitute for other platforms is not more complicated than this.  */
+  return (c == ' ' || c == '\t');
+}
diff --git a/src/gl/tests/langinfo.in.h b/src/gl/tests/langinfo.in.h
new file mode 100644
index 0000000..52d5b29
--- /dev/null
+++ b/src/gl/tests/langinfo.in.h
@@ -0,0 +1,222 @@
+/* Substitute for and wrapper around <langinfo.h>.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/*
+ * POSIX <langinfo.h> for platforms that lack it or have an incomplete one.
+ * <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/langinfo.h.html>
+ */
+
+#ifndef _@GUARD_PREFIX@_LANGINFO_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_LANGINFO_H@
+# @INCLUDE_NEXT@ @NEXT_LANGINFO_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_LANGINFO_H
+#define _@GUARD_PREFIX@_LANGINFO_H
+
+
+#if !@HAVE_LANGINFO_H@
+
+/* A platform that lacks <langinfo.h>.  */
+
+/* Assume that it also lacks <nl_types.h> and the nl_item type.  */
+# if !GNULIB_defined_nl_item
+typedef int nl_item;
+#  define GNULIB_defined_nl_item 1
+# endif
+
+/* nl_langinfo items of the LC_CTYPE category */
+# define CODESET     10000
+/* nl_langinfo items of the LC_NUMERIC category */
+# define RADIXCHAR   10001
+# define DECIMAL_POINT RADIXCHAR
+# define THOUSEP     10002
+# define THOUSANDS_SEP THOUSEP
+# define GROUPING    10114
+/* nl_langinfo items of the LC_TIME category */
+# define D_T_FMT     10003
+# define D_FMT       10004
+# define T_FMT       10005
+# define T_FMT_AMPM  10006
+# define AM_STR      10007
+# define PM_STR      10008
+# define DAY_1       10009
+# define DAY_2       (DAY_1 + 1)
+# define DAY_3       (DAY_1 + 2)
+# define DAY_4       (DAY_1 + 3)
+# define DAY_5       (DAY_1 + 4)
+# define DAY_6       (DAY_1 + 5)
+# define DAY_7       (DAY_1 + 6)
+# define ABDAY_1     10016
+# define ABDAY_2     (ABDAY_1 + 1)
+# define ABDAY_3     (ABDAY_1 + 2)
+# define ABDAY_4     (ABDAY_1 + 3)
+# define ABDAY_5     (ABDAY_1 + 4)
+# define ABDAY_6     (ABDAY_1 + 5)
+# define ABDAY_7     (ABDAY_1 + 6)
+# define MON_1       10023
+# define MON_2       (MON_1 + 1)
+# define MON_3       (MON_1 + 2)
+# define MON_4       (MON_1 + 3)
+# define MON_5       (MON_1 + 4)
+# define MON_6       (MON_1 + 5)
+# define MON_7       (MON_1 + 6)
+# define MON_8       (MON_1 + 7)
+# define MON_9       (MON_1 + 8)
+# define MON_10      (MON_1 + 9)
+# define MON_11      (MON_1 + 10)
+# define MON_12      (MON_1 + 11)
+# define ALTMON_1    10200
+# define ALTMON_2    (ALTMON_1 + 1)
+# define ALTMON_3    (ALTMON_1 + 2)
+# define ALTMON_4    (ALTMON_1 + 3)
+# define ALTMON_5    (ALTMON_1 + 4)
+# define ALTMON_6    (ALTMON_1 + 5)
+# define ALTMON_7    (ALTMON_1 + 6)
+# define ALTMON_8    (ALTMON_1 + 7)
+# define ALTMON_9    (ALTMON_1 + 8)
+# define ALTMON_10   (ALTMON_1 + 9)
+# define ALTMON_11   (ALTMON_1 + 10)
+# define ALTMON_12   (ALTMON_1 + 11)
+# define ABMON_1     10035
+# define ABMON_2     (ABMON_1 + 1)
+# define ABMON_3     (ABMON_1 + 2)
+# define ABMON_4     (ABMON_1 + 3)
+# define ABMON_5     (ABMON_1 + 4)
+# define ABMON_6     (ABMON_1 + 5)
+# define ABMON_7     (ABMON_1 + 6)
+# define ABMON_8     (ABMON_1 + 7)
+# define ABMON_9     (ABMON_1 + 8)
+# define ABMON_10    (ABMON_1 + 9)
+# define ABMON_11    (ABMON_1 + 10)
+# define ABMON_12    (ABMON_1 + 11)
+# define ERA         10047
+# define ERA_D_FMT   10048
+# define ERA_D_T_FMT 10049
+# define ERA_T_FMT   10050
+# define ALT_DIGITS  10051
+/* nl_langinfo items of the LC_MONETARY category */
+# define CRNCYSTR    10052
+# define CURRENCY_SYMBOL   CRNCYSTR
+# define INT_CURR_SYMBOL   10100
+# define MON_DECIMAL_POINT 10101
+# define MON_THOUSANDS_SEP 10102
+# define MON_GROUPING      10103
+# define POSITIVE_SIGN     10104
+# define NEGATIVE_SIGN     10105
+# define FRAC_DIGITS       10106
+# define INT_FRAC_DIGITS   10107
+# define P_CS_PRECEDES     10108
+# define N_CS_PRECEDES     10109
+# define P_SEP_BY_SPACE    10110
+# define N_SEP_BY_SPACE    10111
+# define P_SIGN_POSN       10112
+# define N_SIGN_POSN       10113
+/* nl_langinfo items of the LC_MESSAGES category */
+# define YESEXPR     10053
+# define NOEXPR      10054
+
+#else
+
+/* A platform that has <langinfo.h>.  */
+
+# if !@HAVE_LANGINFO_CODESET@
+#  define CODESET     10000
+#  define GNULIB_defined_CODESET 1
+# endif
+
+# if !@HAVE_LANGINFO_T_FMT_AMPM@
+#  define T_FMT_AMPM  10006
+#  define GNULIB_defined_T_FMT_AMPM 1
+# endif
+
+# if !@HAVE_LANGINFO_ALTMON@
+#  define ALTMON_1    10200
+#  define ALTMON_2    (ALTMON_1 + 1)
+#  define ALTMON_3    (ALTMON_1 + 2)
+#  define ALTMON_4    (ALTMON_1 + 3)
+#  define ALTMON_5    (ALTMON_1 + 4)
+#  define ALTMON_6    (ALTMON_1 + 5)
+#  define ALTMON_7    (ALTMON_1 + 6)
+#  define ALTMON_8    (ALTMON_1 + 7)
+#  define ALTMON_9    (ALTMON_1 + 8)
+#  define ALTMON_10   (ALTMON_1 + 9)
+#  define ALTMON_11   (ALTMON_1 + 10)
+#  define ALTMON_12   (ALTMON_1 + 11)
+#  define GNULIB_defined_ALTMON 1
+# endif
+
+# if !@HAVE_LANGINFO_ERA@
+#  define ERA         10047
+#  define ERA_D_FMT   10048
+#  define ERA_D_T_FMT 10049
+#  define ERA_T_FMT   10050
+#  define ALT_DIGITS  10051
+#  define GNULIB_defined_ERA 1
+# endif
+
+# if !@HAVE_LANGINFO_YESEXPR@
+#  define YESEXPR     10053
+#  define NOEXPR      10054
+#  define GNULIB_defined_YESEXPR 1
+# endif
+
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* Declare overridden functions.  */
+
+
+/* Return a piece of locale dependent information.
+   Note: The difference between nl_langinfo (CODESET) and locale_charset ()
+   is that the latter normalizes the encoding names to GNU conventions.  */
+
+#if @GNULIB_NL_LANGINFO@
+# if @REPLACE_NL_LANGINFO@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef nl_langinfo
+#   define nl_langinfo rpl_nl_langinfo
+#  endif
+_GL_FUNCDECL_RPL (nl_langinfo, char *, (nl_item item));
+_GL_CXXALIAS_RPL (nl_langinfo, char *, (nl_item item));
+# else
+#  if !@HAVE_NL_LANGINFO@
+_GL_FUNCDECL_SYS (nl_langinfo, char *, (nl_item item));
+#  endif
+_GL_CXXALIAS_SYS (nl_langinfo, char *, (nl_item item));
+# endif
+_GL_CXXALIASWARN (nl_langinfo);
+#elif defined GNULIB_POSIXCHECK
+# undef nl_langinfo
+# if HAVE_RAW_DECL_NL_LANGINFO
+_GL_WARN_ON_USE (nl_langinfo, "nl_langinfo is not portable - "
+                 "use gnulib module nl_langinfo for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_LANGINFO_H */
+#endif /* _@GUARD_PREFIX@_LANGINFO_H */
diff --git a/src/gl/tests/locale.in.h b/src/gl/tests/locale.in.h
new file mode 100644
index 0000000..13d1cf2
--- /dev/null
+++ b/src/gl/tests/locale.in.h
@@ -0,0 +1,305 @@
+/* A POSIX <locale.h>.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if (defined _WIN32 && !defined __CYGWIN__ && defined __need_locale_t) \
+    || defined _GL_ALREADY_INCLUDING_LOCALE_H
+
+/* Special invocation convention:
+   - Inside mingw header files,
+   - To handle Solaris header files (through Solaris 10) when combined
+     with gettext's libintl.h.  */
+
+#@INCLUDE_NEXT@ @NEXT_LOCALE_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_LOCALE_H
+
+#define _GL_ALREADY_INCLUDING_LOCALE_H
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_LOCALE_H@
+
+#undef _GL_ALREADY_INCLUDING_LOCALE_H
+
+#ifndef _@GUARD_PREFIX@_LOCALE_H
+#define _@GUARD_PREFIX@_LOCALE_H
+
+/* NetBSD 5.0 mis-defines NULL.  */
+#include <stddef.h>
+
+/* Mac OS X 10.5 defines the locale_t type in <xlocale.h>.  */
+#if @HAVE_XLOCALE_H@
+# include <xlocale.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* The LC_MESSAGES locale category is specified in POSIX, but not in ISO C.
+   On systems that don't define it, use the same value as GNU libintl.  */
+#if !defined LC_MESSAGES
+# define LC_MESSAGES 1729
+#endif
+
+/* On native Windows with MSVC, 'struct lconv' lacks the members int_p_* and
+   int_n_*.  Instead of overriding 'struct lconv', merely define these member
+   names as macros.  This avoids trouble in C++ mode.  */
+#if defined _MSC_VER
+# define int_p_cs_precedes   p_cs_precedes
+# define int_p_sign_posn     p_sign_posn
+# define int_p_sep_by_space  p_sep_by_space
+# define int_n_cs_precedes   n_cs_precedes
+# define int_n_sign_posn     n_sign_posn
+# define int_n_sep_by_space  n_sep_by_space
+#endif
+
+/* Bionic libc's 'struct lconv' is just a dummy.  */
+#if @REPLACE_STRUCT_LCONV@
+# define lconv rpl_lconv
+struct lconv
+{
+  /* All 'char *' are actually 'const char *'.  */
+
+  /* Members that depend on the LC_NUMERIC category of the locale.  See
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_04> */
+
+  /* Symbol used as decimal point.  */
+  char *decimal_point;
+  /* Symbol used to separate groups of digits to the left of the decimal
+     point.  */
+  char *thousands_sep;
+  /* Definition of the size of groups of digits to the left of the decimal
+     point.  */
+  char *grouping;
+
+  /* Members that depend on the LC_MONETARY category of the locale.  See
+     <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_03> */
+
+  /* Symbol used as decimal point.  */
+  char *mon_decimal_point;
+  /* Symbol used to separate groups of digits to the left of the decimal
+     point.  */
+  char *mon_thousands_sep;
+  /* Definition of the size of groups of digits to the left of the decimal
+     point.  */
+  char *mon_grouping;
+  /* Sign used to indicate a value >= 0.  */
+  char *positive_sign;
+  /* Sign used to indicate a value < 0.  */
+  char *negative_sign;
+
+  /* For formatting local currency.  */
+  /* Currency symbol (3 characters) followed by separator (1 character).  */
+  char *currency_symbol;
+  /* Number of digits after the decimal point.  */
+  char frac_digits;
+  /* For values >= 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char p_cs_precedes;
+  /* For values >= 0: Position of the sign.  */
+  char p_sign_posn;
+  /* For values >= 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char p_sep_by_space;
+  /* For values < 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char n_cs_precedes;
+  /* For values < 0: Position of the sign.  */
+  char n_sign_posn;
+  /* For values < 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char n_sep_by_space;
+
+  /* For formatting international currency.  */
+  /* Currency symbol (3 characters) followed by separator (1 character).  */
+  char *int_curr_symbol;
+  /* Number of digits after the decimal point.  */
+  char int_frac_digits;
+  /* For values >= 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char int_p_cs_precedes;
+  /* For values >= 0: Position of the sign.  */
+  char int_p_sign_posn;
+  /* For values >= 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char int_p_sep_by_space;
+  /* For values < 0: 1 if the currency symbol precedes the number, 0 if it
+     comes after the number.  */
+  char int_n_cs_precedes;
+  /* For values < 0: Position of the sign.  */
+  char int_n_sign_posn;
+  /* For values < 0: Placement of spaces between currency symbol, sign, and
+     number.  */
+  char int_n_sep_by_space;
+};
+#endif
+
+#if @GNULIB_LOCALECONV@
+# if @REPLACE_LOCALECONV@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef localeconv
+#   define localeconv rpl_localeconv
+#  endif
+_GL_FUNCDECL_RPL (localeconv, struct lconv *, (void));
+_GL_CXXALIAS_RPL (localeconv, struct lconv *, (void));
+# else
+_GL_CXXALIAS_SYS (localeconv, struct lconv *, (void));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (localeconv);
+# endif
+#elif @REPLACE_STRUCT_LCONV@
+# undef localeconv
+# define localeconv localeconv_used_without_requesting_gnulib_module_localeconv
+#elif defined GNULIB_POSIXCHECK
+# undef localeconv
+# if HAVE_RAW_DECL_LOCALECONV
+_GL_WARN_ON_USE (localeconv,
+                 "localeconv returns too few information on some platforms - "
+                 "use gnulib module localeconv for portability");
+# endif
+#endif
+
+#if @GNULIB_SETLOCALE@
+# if @REPLACE_SETLOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef setlocale
+#   define setlocale rpl_setlocale
+#   define GNULIB_defined_setlocale 1
+#  endif
+_GL_FUNCDECL_RPL (setlocale, char *, (int category, const char *locale));
+_GL_CXXALIAS_RPL (setlocale, char *, (int category, const char *locale));
+# else
+_GL_CXXALIAS_SYS (setlocale, char *, (int category, const char *locale));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (setlocale);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef setlocale
+# if HAVE_RAW_DECL_SETLOCALE
+_GL_WARN_ON_USE (setlocale, "setlocale works differently on native Windows - "
+                 "use gnulib module setlocale for portability");
+# endif
+#endif
+
+#if @GNULIB_SETLOCALE_NULL@
+/* Included here for convenience.  */
+# include "setlocale_null.h"
+#endif
+
+#if /*@GNULIB_NEWLOCALE@ ||*/ (@GNULIB_LOCALENAME@ && @LOCALENAME_ENHANCE_LOCALE_FUNCS@ && @HAVE_NEWLOCALE@)
+# if @REPLACE_NEWLOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef newlocale
+#   define newlocale rpl_newlocale
+#   define GNULIB_defined_newlocale 1
+#  endif
+_GL_FUNCDECL_RPL (newlocale, locale_t,
+                  (int category_mask, const char *name, locale_t base)
+                  _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (newlocale, locale_t,
+                  (int category_mask, const char *name, locale_t base));
+# else
+#  if @HAVE_NEWLOCALE@
+_GL_CXXALIAS_SYS (newlocale, locale_t,
+                  (int category_mask, const char *name, locale_t base));
+#  endif
+# endif
+# if @HAVE_NEWLOCALE@
+_GL_CXXALIASWARN (newlocale);
+# endif
+# if @HAVE_NEWLOCALE@ || @REPLACE_NEWLOCALE@
+#  ifndef HAVE_WORKING_NEWLOCALE
+#   define HAVE_WORKING_NEWLOCALE 1
+#  endif
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef newlocale
+# if HAVE_RAW_DECL_NEWLOCALE
+_GL_WARN_ON_USE (newlocale, "newlocale is not portable");
+# endif
+#endif
+
+#if @GNULIB_DUPLOCALE@ || (@GNULIB_LOCALENAME@ && @LOCALENAME_ENHANCE_LOCALE_FUNCS@ && @HAVE_DUPLOCALE@)
+# if @REPLACE_DUPLOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef duplocale
+#   define duplocale rpl_duplocale
+#   define GNULIB_defined_duplocale 1
+#  endif
+_GL_FUNCDECL_RPL (duplocale, locale_t, (locale_t locale) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (duplocale, locale_t, (locale_t locale));
+# else
+#  if @HAVE_DUPLOCALE@
+_GL_CXXALIAS_SYS (duplocale, locale_t, (locale_t locale));
+#  endif
+# endif
+# if @HAVE_DUPLOCALE@
+_GL_CXXALIASWARN (duplocale);
+# endif
+# if @HAVE_DUPLOCALE@ || @REPLACE_DUPLOCALE@
+#  ifndef HAVE_WORKING_DUPLOCALE
+#   define HAVE_WORKING_DUPLOCALE 1
+#  endif
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef duplocale
+# if HAVE_RAW_DECL_DUPLOCALE
+_GL_WARN_ON_USE (duplocale, "duplocale is buggy on some glibc systems - "
+                 "use gnulib module duplocale for portability");
+# endif
+#endif
+
+#if /*@GNULIB_FREELOCALE@ ||*/ (@GNULIB_LOCALENAME@ && @LOCALENAME_ENHANCE_LOCALE_FUNCS@ && @HAVE_FREELOCALE@)
+# if @REPLACE_FREELOCALE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef freelocale
+#   define freelocale rpl_freelocale
+#   define GNULIB_defined_freelocale 1
+#  endif
+_GL_FUNCDECL_RPL (freelocale, void, (locale_t locale) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (freelocale, void, (locale_t locale));
+# else
+#  if @HAVE_FREELOCALE@
+/* Need to cast, because on FreeBSD and Mac OS X 10.13, the return type is
+                                   int.  */
+_GL_CXXALIAS_SYS_CAST (freelocale, void, (locale_t locale));
+#  endif
+# endif
+# if @HAVE_FREELOCALE@
+_GL_CXXALIASWARN (freelocale);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef freelocale
+# if HAVE_RAW_DECL_FREELOCALE
+_GL_WARN_ON_USE (freelocale, "freelocale is not portable");
+# endif
+#endif
+
+#endif /* _@GUARD_PREFIX@_LOCALE_H */
+#endif /* _@GUARD_PREFIX@_LOCALE_H */
+#endif /* !(__need_locale_t || _GL_ALREADY_INCLUDING_LOCALE_H) */
diff --git a/src/gl/tests/localename-table.c b/src/gl/tests/localename-table.c
new file mode 100644
index 0000000..c7a3d0b
--- /dev/null
+++ b/src/gl/tests/localename-table.c
@@ -0,0 +1,48 @@
+/* Table that maps a locale object to the names of the locale categories.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#include <config.h>
+
+#if HAVE_WORKING_USELOCALE && HAVE_NAMELESS_LOCALES
+
+/* Specification.  */
+#include "localename-table.h"
+
+#include <stdint.h>
+
+/* A hash function for pointers.  */
+size_t _GL_ATTRIBUTE_CONST
+locale_hash_function (locale_t x)
+{
+  uintptr_t p = (uintptr_t) x;
+  size_t h = ((p % 4177) << 12) + ((p % 79) << 6) + (p % 61);
+  return h;
+}
+
+struct locale_hash_node * locale_hash_table[LOCALE_HASH_TABLE_SIZE]
+  /* = { NULL, ..., NULL } */;
+
+gl_rwlock_define_initialized(, locale_lock)
+
+#else
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#endif
diff --git a/src/gl/tests/localename-table.h b/src/gl/tests/localename-table.h
new file mode 100644
index 0000000..b4377c2
--- /dev/null
+++ b/src/gl/tests/localename-table.h
@@ -0,0 +1,73 @@
+/* Table that maps a locale object to the names of the locale categories.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#if HAVE_WORKING_USELOCALE && HAVE_NAMELESS_LOCALES
+
+# include <stddef.h>
+# include <locale.h>
+
+# ifdef IN_LIBINTL
+#  include "lock.h"
+# else
+#  include "glthread/lock.h"
+# endif
+
+struct locale_categories_names
+  {
+    /* Locale category -> name (allocated with indefinite extent).  */
+    const char *category_name[6];
+  };
+
+/* A hash table of fixed size.  Multiple threads can access it read-only
+   simultaneously, but only one thread can insert into it or remove from it
+   at the same time.
+   This hash table has global scope, so that when an application uses both
+   GNU libintl and gnulib, the application sees only one hash table.  (When
+   linking statically with libintl, the fact that localename-table.c is a
+   separate compilation unit resolves the duplicate symbol conflict.  When
+   linking with libintl as a shared library, we rely on ELF and the symbol
+   conflict resolution implemented in the ELF dynamic loader here.)
+   Both the libintl overrides and the gnulib overrides of the functions
+   newlocale, duplocale, freelocale see the same hash table (and the same lock).
+   For this reason, the internal layout of the hash table and the hash function
+   MUST NEVER CHANGE.  If you need to change the internal layout or the hash
+   function, introduce versioning by appending a version suffix to the symbols
+   at the linker level.  */
+# define locale_hash_function libintl_locale_hash_function
+# define locale_hash_table libintl_locale_hash_table
+# define locale_lock libintl_locale_lock
+
+extern size_t _GL_ATTRIBUTE_CONST locale_hash_function (locale_t x);
+
+/* A node in a hash bucket collision list.  */
+struct locale_hash_node
+  {
+    struct locale_hash_node *next;
+    locale_t locale;
+    struct locale_categories_names names;
+  };
+
+# define LOCALE_HASH_TABLE_SIZE 101
+extern struct locale_hash_node * locale_hash_table[LOCALE_HASH_TABLE_SIZE];
+
+/* This lock protects the locale_hash_table against multiple simultaneous
+   accesses (except that multiple simultaneous read accesses are allowed).  */
+
+gl_rwlock_define(extern, locale_lock)
+
+#endif
diff --git a/src/gl/tests/localename.c b/src/gl/tests/localename.c
new file mode 100644
index 0000000..5e393a2
--- /dev/null
+++ b/src/gl/tests/localename.c
@@ -0,0 +1,3459 @@
+/* Determine name of the currently selected locale.
+   Copyright (C) 1995-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Ulrich Drepper <drepper@gnu.org>, 1995.  */
+/* Native Windows code written by Tor Lillqvist <tml@iki.fi>.  */
+/* Mac OS X code written by Bruno Haible <bruno@clisp.org>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#ifdef IN_LIBINTL
+# include "gettextP.h"
+#else
+# include "localename.h"
+#endif
+
+#include <limits.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <locale.h>
+#include <string.h>
+
+#include "flexmember.h"
+#include "setlocale_null.h"
+#include "thread-optim.h"
+
+#if HAVE_GOOD_USELOCALE
+/* Mac OS X 10.5 defines the locale_t type in <xlocale.h>.  */
+# if defined __APPLE__ && defined __MACH__
+#  include <xlocale.h>
+# endif
+# if (__GLIBC__ >= 2 && !defined __UCLIBC__) || (defined __linux__ && HAVE_LANGINFO_H) || defined __CYGWIN__
+#  include <langinfo.h>
+# endif
+# if !defined IN_LIBINTL
+#  include "glthread/lock.h"
+# endif
+# if defined __sun
+#  if HAVE_GETLOCALENAME_L
+/* Solaris >= 12.  */
+extern char * getlocalename_l(int, locale_t);
+#  elif HAVE_SOLARIS114_LOCALES
+#   include <sys/localedef.h>
+#  endif
+# endif
+# if HAVE_NAMELESS_LOCALES
+#  include "localename-table.h"
+# endif
+#endif
+
+#if HAVE_CFPREFERENCESCOPYAPPVALUE
+# include <CoreFoundation/CFString.h>
+# include <CoreFoundation/CFPreferences.h>
+#endif
+
+#if defined _WIN32 && !defined __CYGWIN__
+# define WINDOWS_NATIVE
+# if !defined IN_LIBINTL
+#  include "glthread/lock.h"
+# endif
+#endif
+
+#if defined WINDOWS_NATIVE || defined __CYGWIN__ /* Native Windows or Cygwin */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# include <winnls.h>
+/* List of language codes, sorted by value:
+   0x01 LANG_ARABIC
+   0x02 LANG_BULGARIAN
+   0x03 LANG_CATALAN
+   0x04 LANG_CHINESE
+   0x05 LANG_CZECH
+   0x06 LANG_DANISH
+   0x07 LANG_GERMAN
+   0x08 LANG_GREEK
+   0x09 LANG_ENGLISH
+   0x0a LANG_SPANISH
+   0x0b LANG_FINNISH
+   0x0c LANG_FRENCH
+   0x0d LANG_HEBREW
+   0x0e LANG_HUNGARIAN
+   0x0f LANG_ICELANDIC
+   0x10 LANG_ITALIAN
+   0x11 LANG_JAPANESE
+   0x12 LANG_KOREAN
+   0x13 LANG_DUTCH
+   0x14 LANG_NORWEGIAN
+   0x15 LANG_POLISH
+   0x16 LANG_PORTUGUESE
+   0x17 LANG_ROMANSH
+   0x18 LANG_ROMANIAN
+   0x19 LANG_RUSSIAN
+   0x1a LANG_CROATIAN == LANG_SERBIAN
+   0x1b LANG_SLOVAK
+   0x1c LANG_ALBANIAN
+   0x1d LANG_SWEDISH
+   0x1e LANG_THAI
+   0x1f LANG_TURKISH
+   0x20 LANG_URDU
+   0x21 LANG_INDONESIAN
+   0x22 LANG_UKRAINIAN
+   0x23 LANG_BELARUSIAN
+   0x24 LANG_SLOVENIAN
+   0x25 LANG_ESTONIAN
+   0x26 LANG_LATVIAN
+   0x27 LANG_LITHUANIAN
+   0x28 LANG_TAJIK
+   0x29 LANG_FARSI
+   0x2a LANG_VIETNAMESE
+   0x2b LANG_ARMENIAN
+   0x2c LANG_AZERI
+   0x2d LANG_BASQUE
+   0x2e LANG_SORBIAN
+   0x2f LANG_MACEDONIAN
+   0x30 LANG_SUTU
+   0x31 LANG_TSONGA
+   0x32 LANG_TSWANA
+   0x33 LANG_VENDA
+   0x34 LANG_XHOSA
+   0x35 LANG_ZULU
+   0x36 LANG_AFRIKAANS
+   0x37 LANG_GEORGIAN
+   0x38 LANG_FAEROESE
+   0x39 LANG_HINDI
+   0x3a LANG_MALTESE
+   0x3b LANG_SAMI
+   0x3c LANG_GAELIC
+   0x3d LANG_YIDDISH
+   0x3e LANG_MALAY
+   0x3f LANG_KAZAK
+   0x40 LANG_KYRGYZ
+   0x41 LANG_SWAHILI
+   0x42 LANG_TURKMEN
+   0x43 LANG_UZBEK
+   0x44 LANG_TATAR
+   0x45 LANG_BENGALI
+   0x46 LANG_PUNJABI
+   0x47 LANG_GUJARATI
+   0x48 LANG_ORIYA
+   0x49 LANG_TAMIL
+   0x4a LANG_TELUGU
+   0x4b LANG_KANNADA
+   0x4c LANG_MALAYALAM
+   0x4d LANG_ASSAMESE
+   0x4e LANG_MARATHI
+   0x4f LANG_SANSKRIT
+   0x50 LANG_MONGOLIAN
+   0x51 LANG_TIBETAN
+   0x52 LANG_WELSH
+   0x53 LANG_CAMBODIAN
+   0x54 LANG_LAO
+   0x55 LANG_BURMESE
+   0x56 LANG_GALICIAN
+   0x57 LANG_KONKANI
+   0x58 LANG_MANIPURI
+   0x59 LANG_SINDHI
+   0x5a LANG_SYRIAC
+   0x5b LANG_SINHALESE
+   0x5c LANG_CHEROKEE
+   0x5d LANG_INUKTITUT
+   0x5e LANG_AMHARIC
+   0x5f LANG_TAMAZIGHT
+   0x60 LANG_KASHMIRI
+   0x61 LANG_NEPALI
+   0x62 LANG_FRISIAN
+   0x63 LANG_PASHTO
+   0x64 LANG_TAGALOG
+   0x65 LANG_DIVEHI
+   0x66 LANG_EDO
+   0x67 LANG_FULFULDE
+   0x68 LANG_HAUSA
+   0x69 LANG_IBIBIO
+   0x6a LANG_YORUBA
+   0x6d LANG_BASHKIR
+   0x6e LANG_LUXEMBOURGISH
+   0x6f LANG_GREENLANDIC
+   0x70 LANG_IGBO
+   0x71 LANG_KANURI
+   0x72 LANG_OROMO
+   0x73 LANG_TIGRINYA
+   0x74 LANG_GUARANI
+   0x75 LANG_HAWAIIAN
+   0x76 LANG_LATIN
+   0x77 LANG_SOMALI
+   0x78 LANG_YI
+   0x79 LANG_PAPIAMENTU
+   0x7a LANG_MAPUDUNGUN
+   0x7c LANG_MOHAWK
+   0x7e LANG_BRETON
+   0x82 LANG_OCCITAN
+   0x83 LANG_CORSICAN
+   0x84 LANG_ALSATIAN
+   0x85 LANG_YAKUT
+   0x86 LANG_KICHE
+   0x87 LANG_KINYARWANDA
+   0x88 LANG_WOLOF
+   0x8c LANG_DARI
+   0x91 LANG_SCOTTISH_GAELIC
+*/
+/* Mingw headers don't have latest language and sublanguage codes.  */
+# ifndef LANG_AFRIKAANS
+# define LANG_AFRIKAANS 0x36
+# endif
+# ifndef LANG_ALBANIAN
+# define LANG_ALBANIAN 0x1c
+# endif
+# ifndef LANG_ALSATIAN
+# define LANG_ALSATIAN 0x84
+# endif
+# ifndef LANG_AMHARIC
+# define LANG_AMHARIC 0x5e
+# endif
+# ifndef LANG_ARABIC
+# define LANG_ARABIC 0x01
+# endif
+# ifndef LANG_ARMENIAN
+# define LANG_ARMENIAN 0x2b
+# endif
+# ifndef LANG_ASSAMESE
+# define LANG_ASSAMESE 0x4d
+# endif
+# ifndef LANG_AZERI
+# define LANG_AZERI 0x2c
+# endif
+# ifndef LANG_BASHKIR
+# define LANG_BASHKIR 0x6d
+# endif
+# ifndef LANG_BASQUE
+# define LANG_BASQUE 0x2d
+# endif
+# ifndef LANG_BELARUSIAN
+# define LANG_BELARUSIAN 0x23
+# endif
+# ifndef LANG_BENGALI
+# define LANG_BENGALI 0x45
+# endif
+# ifndef LANG_BRETON
+# define LANG_BRETON 0x7e
+# endif
+# ifndef LANG_BURMESE
+# define LANG_BURMESE 0x55
+# endif
+# ifndef LANG_CAMBODIAN
+# define LANG_CAMBODIAN 0x53
+# endif
+# ifndef LANG_CATALAN
+# define LANG_CATALAN 0x03
+# endif
+# ifndef LANG_CHEROKEE
+# define LANG_CHEROKEE 0x5c
+# endif
+# ifndef LANG_CORSICAN
+# define LANG_CORSICAN 0x83
+# endif
+# ifndef LANG_DARI
+# define LANG_DARI 0x8c
+# endif
+# ifndef LANG_DIVEHI
+# define LANG_DIVEHI 0x65
+# endif
+# ifndef LANG_EDO
+# define LANG_EDO 0x66
+# endif
+# ifndef LANG_ESTONIAN
+# define LANG_ESTONIAN 0x25
+# endif
+# ifndef LANG_FAEROESE
+# define LANG_FAEROESE 0x38
+# endif
+# ifndef LANG_FARSI
+# define LANG_FARSI 0x29
+# endif
+# ifndef LANG_FRISIAN
+# define LANG_FRISIAN 0x62
+# endif
+# ifndef LANG_FULFULDE
+# define LANG_FULFULDE 0x67
+# endif
+# ifndef LANG_GAELIC
+# define LANG_GAELIC 0x3c
+# endif
+# ifndef LANG_GALICIAN
+# define LANG_GALICIAN 0x56
+# endif
+# ifndef LANG_GEORGIAN
+# define LANG_GEORGIAN 0x37
+# endif
+# ifndef LANG_GREENLANDIC
+# define LANG_GREENLANDIC 0x6f
+# endif
+# ifndef LANG_GUARANI
+# define LANG_GUARANI 0x74
+# endif
+# ifndef LANG_GUJARATI
+# define LANG_GUJARATI 0x47
+# endif
+# ifndef LANG_HAUSA
+# define LANG_HAUSA 0x68
+# endif
+# ifndef LANG_HAWAIIAN
+# define LANG_HAWAIIAN 0x75
+# endif
+# ifndef LANG_HEBREW
+# define LANG_HEBREW 0x0d
+# endif
+# ifndef LANG_HINDI
+# define LANG_HINDI 0x39
+# endif
+# ifndef LANG_IBIBIO
+# define LANG_IBIBIO 0x69
+# endif
+# ifndef LANG_IGBO
+# define LANG_IGBO 0x70
+# endif
+# ifndef LANG_INDONESIAN
+# define LANG_INDONESIAN 0x21
+# endif
+# ifndef LANG_INUKTITUT
+# define LANG_INUKTITUT 0x5d
+# endif
+# ifndef LANG_KANNADA
+# define LANG_KANNADA 0x4b
+# endif
+# ifndef LANG_KANURI
+# define LANG_KANURI 0x71
+# endif
+# ifndef LANG_KASHMIRI
+# define LANG_KASHMIRI 0x60
+# endif
+# ifndef LANG_KAZAK
+# define LANG_KAZAK 0x3f
+# endif
+# ifndef LANG_KICHE
+# define LANG_KICHE 0x86
+# endif
+# ifndef LANG_KINYARWANDA
+# define LANG_KINYARWANDA 0x87
+# endif
+# ifndef LANG_KONKANI
+# define LANG_KONKANI 0x57
+# endif
+# ifndef LANG_KYRGYZ
+# define LANG_KYRGYZ 0x40
+# endif
+# ifndef LANG_LAO
+# define LANG_LAO 0x54
+# endif
+# ifndef LANG_LATIN
+# define LANG_LATIN 0x76
+# endif
+# ifndef LANG_LATVIAN
+# define LANG_LATVIAN 0x26
+# endif
+# ifndef LANG_LITHUANIAN
+# define LANG_LITHUANIAN 0x27
+# endif
+# ifndef LANG_LUXEMBOURGISH
+# define LANG_LUXEMBOURGISH 0x6e
+# endif
+# ifndef LANG_MACEDONIAN
+# define LANG_MACEDONIAN 0x2f
+# endif
+# ifndef LANG_MALAY
+# define LANG_MALAY 0x3e
+# endif
+# ifndef LANG_MALAYALAM
+# define LANG_MALAYALAM 0x4c
+# endif
+# ifndef LANG_MALTESE
+# define LANG_MALTESE 0x3a
+# endif
+# ifndef LANG_MANIPURI
+# define LANG_MANIPURI 0x58
+# endif
+# ifndef LANG_MAORI
+# define LANG_MAORI 0x81
+# endif
+# ifndef LANG_MAPUDUNGUN
+# define LANG_MAPUDUNGUN 0x7a
+# endif
+# ifndef LANG_MARATHI
+# define LANG_MARATHI 0x4e
+# endif
+# ifndef LANG_MOHAWK
+# define LANG_MOHAWK 0x7c
+# endif
+# ifndef LANG_MONGOLIAN
+# define LANG_MONGOLIAN 0x50
+# endif
+# ifndef LANG_NEPALI
+# define LANG_NEPALI 0x61
+# endif
+# ifndef LANG_OCCITAN
+# define LANG_OCCITAN 0x82
+# endif
+# ifndef LANG_ORIYA
+# define LANG_ORIYA 0x48
+# endif
+# ifndef LANG_OROMO
+# define LANG_OROMO 0x72
+# endif
+# ifndef LANG_PAPIAMENTU
+# define LANG_PAPIAMENTU 0x79
+# endif
+# ifndef LANG_PASHTO
+# define LANG_PASHTO 0x63
+# endif
+# ifndef LANG_PUNJABI
+# define LANG_PUNJABI 0x46
+# endif
+# ifndef LANG_QUECHUA
+# define LANG_QUECHUA 0x6b
+# endif
+# ifndef LANG_ROMANSH
+# define LANG_ROMANSH 0x17
+# endif
+# ifndef LANG_SAMI
+# define LANG_SAMI 0x3b
+# endif
+# ifndef LANG_SANSKRIT
+# define LANG_SANSKRIT 0x4f
+# endif
+# ifndef LANG_SCOTTISH_GAELIC
+# define LANG_SCOTTISH_GAELIC 0x91
+# endif
+# ifndef LANG_SERBIAN
+# define LANG_SERBIAN 0x1a
+# endif
+# ifndef LANG_SINDHI
+# define LANG_SINDHI 0x59
+# endif
+# ifndef LANG_SINHALESE
+# define LANG_SINHALESE 0x5b
+# endif
+# ifndef LANG_SLOVAK
+# define LANG_SLOVAK 0x1b
+# endif
+# ifndef LANG_SOMALI
+# define LANG_SOMALI 0x77
+# endif
+# ifndef LANG_SORBIAN
+# define LANG_SORBIAN 0x2e
+# endif
+# ifndef LANG_SOTHO
+# define LANG_SOTHO 0x6c
+# endif
+# ifndef LANG_SUTU
+# define LANG_SUTU 0x30
+# endif
+# ifndef LANG_SWAHILI
+# define LANG_SWAHILI 0x41
+# endif
+# ifndef LANG_SYRIAC
+# define LANG_SYRIAC 0x5a
+# endif
+# ifndef LANG_TAGALOG
+# define LANG_TAGALOG 0x64
+# endif
+# ifndef LANG_TAJIK
+# define LANG_TAJIK 0x28
+# endif
+# ifndef LANG_TAMAZIGHT
+# define LANG_TAMAZIGHT 0x5f
+# endif
+# ifndef LANG_TAMIL
+# define LANG_TAMIL 0x49
+# endif
+# ifndef LANG_TATAR
+# define LANG_TATAR 0x44
+# endif
+# ifndef LANG_TELUGU
+# define LANG_TELUGU 0x4a
+# endif
+# ifndef LANG_THAI
+# define LANG_THAI 0x1e
+# endif
+# ifndef LANG_TIBETAN
+# define LANG_TIBETAN 0x51
+# endif
+# ifndef LANG_TIGRINYA
+# define LANG_TIGRINYA 0x73
+# endif
+# ifndef LANG_TSONGA
+# define LANG_TSONGA 0x31
+# endif
+# ifndef LANG_TSWANA
+# define LANG_TSWANA 0x32
+# endif
+# ifndef LANG_TURKMEN
+# define LANG_TURKMEN 0x42
+# endif
+# ifndef LANG_UIGHUR
+# define LANG_UIGHUR 0x80
+# endif
+# ifndef LANG_UKRAINIAN
+# define LANG_UKRAINIAN 0x22
+# endif
+# ifndef LANG_URDU
+# define LANG_URDU 0x20
+# endif
+# ifndef LANG_UZBEK
+# define LANG_UZBEK 0x43
+# endif
+# ifndef LANG_VENDA
+# define LANG_VENDA 0x33
+# endif
+# ifndef LANG_VIETNAMESE
+# define LANG_VIETNAMESE 0x2a
+# endif
+# ifndef LANG_WELSH
+# define LANG_WELSH 0x52
+# endif
+# ifndef LANG_WOLOF
+# define LANG_WOLOF 0x88
+# endif
+# ifndef LANG_XHOSA
+# define LANG_XHOSA 0x34
+# endif
+# ifndef LANG_YAKUT
+# define LANG_YAKUT 0x85
+# endif
+# ifndef LANG_YI
+# define LANG_YI 0x78
+# endif
+# ifndef LANG_YIDDISH
+# define LANG_YIDDISH 0x3d
+# endif
+# ifndef LANG_YORUBA
+# define LANG_YORUBA 0x6a
+# endif
+# ifndef LANG_ZULU
+# define LANG_ZULU 0x35
+# endif
+# ifndef SUBLANG_AFRIKAANS_SOUTH_AFRICA
+# define SUBLANG_AFRIKAANS_SOUTH_AFRICA 0x01
+# endif
+# ifndef SUBLANG_ALBANIAN_ALBANIA
+# define SUBLANG_ALBANIAN_ALBANIA 0x01
+# endif
+# ifndef SUBLANG_ALSATIAN_FRANCE
+# define SUBLANG_ALSATIAN_FRANCE 0x01
+# endif
+# ifndef SUBLANG_AMHARIC_ETHIOPIA
+# define SUBLANG_AMHARIC_ETHIOPIA 0x01
+# endif
+# ifndef SUBLANG_ARABIC_SAUDI_ARABIA
+# define SUBLANG_ARABIC_SAUDI_ARABIA 0x01
+# endif
+# ifndef SUBLANG_ARABIC_IRAQ
+# define SUBLANG_ARABIC_IRAQ 0x02
+# endif
+# ifndef SUBLANG_ARABIC_EGYPT
+# define SUBLANG_ARABIC_EGYPT 0x03
+# endif
+# ifndef SUBLANG_ARABIC_LIBYA
+# define SUBLANG_ARABIC_LIBYA 0x04
+# endif
+# ifndef SUBLANG_ARABIC_ALGERIA
+# define SUBLANG_ARABIC_ALGERIA 0x05
+# endif
+# ifndef SUBLANG_ARABIC_MOROCCO
+# define SUBLANG_ARABIC_MOROCCO 0x06
+# endif
+# ifndef SUBLANG_ARABIC_TUNISIA
+# define SUBLANG_ARABIC_TUNISIA 0x07
+# endif
+# ifndef SUBLANG_ARABIC_OMAN
+# define SUBLANG_ARABIC_OMAN 0x08
+# endif
+# ifndef SUBLANG_ARABIC_YEMEN
+# define SUBLANG_ARABIC_YEMEN 0x09
+# endif
+# ifndef SUBLANG_ARABIC_SYRIA
+# define SUBLANG_ARABIC_SYRIA 0x0a
+# endif
+# ifndef SUBLANG_ARABIC_JORDAN
+# define SUBLANG_ARABIC_JORDAN 0x0b
+# endif
+# ifndef SUBLANG_ARABIC_LEBANON
+# define SUBLANG_ARABIC_LEBANON 0x0c
+# endif
+# ifndef SUBLANG_ARABIC_KUWAIT
+# define SUBLANG_ARABIC_KUWAIT 0x0d
+# endif
+# ifndef SUBLANG_ARABIC_UAE
+# define SUBLANG_ARABIC_UAE 0x0e
+# endif
+# ifndef SUBLANG_ARABIC_BAHRAIN
+# define SUBLANG_ARABIC_BAHRAIN 0x0f
+# endif
+# ifndef SUBLANG_ARABIC_QATAR
+# define SUBLANG_ARABIC_QATAR 0x10
+# endif
+# ifndef SUBLANG_ARMENIAN_ARMENIA
+# define SUBLANG_ARMENIAN_ARMENIA 0x01
+# endif
+# ifndef SUBLANG_ASSAMESE_INDIA
+# define SUBLANG_ASSAMESE_INDIA 0x01
+# endif
+# ifndef SUBLANG_AZERI_LATIN
+# define SUBLANG_AZERI_LATIN 0x01
+# endif
+# ifndef SUBLANG_AZERI_CYRILLIC
+# define SUBLANG_AZERI_CYRILLIC 0x02
+# endif
+# ifndef SUBLANG_BASHKIR_RUSSIA
+# define SUBLANG_BASHKIR_RUSSIA 0x01
+# endif
+# ifndef SUBLANG_BASQUE_BASQUE
+# define SUBLANG_BASQUE_BASQUE 0x01
+# endif
+# ifndef SUBLANG_BELARUSIAN_BELARUS
+# define SUBLANG_BELARUSIAN_BELARUS 0x01
+# endif
+# ifndef SUBLANG_BENGALI_INDIA
+# define SUBLANG_BENGALI_INDIA 0x01
+# endif
+# ifndef SUBLANG_BENGALI_BANGLADESH
+# define SUBLANG_BENGALI_BANGLADESH 0x02
+# endif
+# ifndef SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_LATIN
+# define SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_LATIN 0x05
+# endif
+# ifndef SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_CYRILLIC
+# define SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_CYRILLIC 0x08
+# endif
+# ifndef SUBLANG_BRETON_FRANCE
+# define SUBLANG_BRETON_FRANCE 0x01
+# endif
+# ifndef SUBLANG_BULGARIAN_BULGARIA
+# define SUBLANG_BULGARIAN_BULGARIA 0x01
+# endif
+# ifndef SUBLANG_CAMBODIAN_CAMBODIA
+# define SUBLANG_CAMBODIAN_CAMBODIA 0x01
+# endif
+# ifndef SUBLANG_CATALAN_SPAIN
+# define SUBLANG_CATALAN_SPAIN 0x01
+# endif
+# ifndef SUBLANG_CORSICAN_FRANCE
+# define SUBLANG_CORSICAN_FRANCE 0x01
+# endif
+# ifndef SUBLANG_CROATIAN_CROATIA
+# define SUBLANG_CROATIAN_CROATIA 0x01
+# endif
+# ifndef SUBLANG_CROATIAN_BOSNIA_HERZEGOVINA_LATIN
+# define SUBLANG_CROATIAN_BOSNIA_HERZEGOVINA_LATIN 0x04
+# endif
+# ifndef SUBLANG_CHINESE_MACAU
+# define SUBLANG_CHINESE_MACAU 0x05
+# endif
+# ifndef SUBLANG_CZECH_CZECH_REPUBLIC
+# define SUBLANG_CZECH_CZECH_REPUBLIC 0x01
+# endif
+# ifndef SUBLANG_DANISH_DENMARK
+# define SUBLANG_DANISH_DENMARK 0x01
+# endif
+# ifndef SUBLANG_DARI_AFGHANISTAN
+# define SUBLANG_DARI_AFGHANISTAN 0x01
+# endif
+# ifndef SUBLANG_DIVEHI_MALDIVES
+# define SUBLANG_DIVEHI_MALDIVES 0x01
+# endif
+# ifndef SUBLANG_DUTCH_SURINAM
+# define SUBLANG_DUTCH_SURINAM 0x03
+# endif
+# ifndef SUBLANG_ENGLISH_SOUTH_AFRICA
+# define SUBLANG_ENGLISH_SOUTH_AFRICA 0x07
+# endif
+# ifndef SUBLANG_ENGLISH_JAMAICA
+# define SUBLANG_ENGLISH_JAMAICA 0x08
+# endif
+# ifndef SUBLANG_ENGLISH_CARIBBEAN
+# define SUBLANG_ENGLISH_CARIBBEAN 0x09
+# endif
+# ifndef SUBLANG_ENGLISH_BELIZE
+# define SUBLANG_ENGLISH_BELIZE 0x0a
+# endif
+# ifndef SUBLANG_ENGLISH_TRINIDAD
+# define SUBLANG_ENGLISH_TRINIDAD 0x0b
+# endif
+# ifndef SUBLANG_ENGLISH_ZIMBABWE
+# define SUBLANG_ENGLISH_ZIMBABWE 0x0c
+# endif
+# ifndef SUBLANG_ENGLISH_PHILIPPINES
+# define SUBLANG_ENGLISH_PHILIPPINES 0x0d
+# endif
+# ifndef SUBLANG_ENGLISH_INDONESIA
+# define SUBLANG_ENGLISH_INDONESIA 0x0e
+# endif
+# ifndef SUBLANG_ENGLISH_HONGKONG
+# define SUBLANG_ENGLISH_HONGKONG 0x0f
+# endif
+# ifndef SUBLANG_ENGLISH_INDIA
+# define SUBLANG_ENGLISH_INDIA 0x10
+# endif
+# ifndef SUBLANG_ENGLISH_MALAYSIA
+# define SUBLANG_ENGLISH_MALAYSIA 0x11
+# endif
+# ifndef SUBLANG_ENGLISH_SINGAPORE
+# define SUBLANG_ENGLISH_SINGAPORE 0x12
+# endif
+# ifndef SUBLANG_ESTONIAN_ESTONIA
+# define SUBLANG_ESTONIAN_ESTONIA 0x01
+# endif
+# ifndef SUBLANG_FAEROESE_FAROE_ISLANDS
+# define SUBLANG_FAEROESE_FAROE_ISLANDS 0x01
+# endif
+# ifndef SUBLANG_FARSI_IRAN
+# define SUBLANG_FARSI_IRAN 0x01
+# endif
+# ifndef SUBLANG_FINNISH_FINLAND
+# define SUBLANG_FINNISH_FINLAND 0x01
+# endif
+# ifndef SUBLANG_FRENCH_LUXEMBOURG
+# define SUBLANG_FRENCH_LUXEMBOURG 0x05
+# endif
+# ifndef SUBLANG_FRENCH_MONACO
+# define SUBLANG_FRENCH_MONACO 0x06
+# endif
+# ifndef SUBLANG_FRENCH_WESTINDIES
+# define SUBLANG_FRENCH_WESTINDIES 0x07
+# endif
+# ifndef SUBLANG_FRENCH_REUNION
+# define SUBLANG_FRENCH_REUNION 0x08
+# endif
+# ifndef SUBLANG_FRENCH_CONGO
+# define SUBLANG_FRENCH_CONGO 0x09
+# endif
+# ifndef SUBLANG_FRENCH_SENEGAL
+# define SUBLANG_FRENCH_SENEGAL 0x0a
+# endif
+# ifndef SUBLANG_FRENCH_CAMEROON
+# define SUBLANG_FRENCH_CAMEROON 0x0b
+# endif
+# ifndef SUBLANG_FRENCH_COTEDIVOIRE
+# define SUBLANG_FRENCH_COTEDIVOIRE 0x0c
+# endif
+# ifndef SUBLANG_FRENCH_MALI
+# define SUBLANG_FRENCH_MALI 0x0d
+# endif
+# ifndef SUBLANG_FRENCH_MOROCCO
+# define SUBLANG_FRENCH_MOROCCO 0x0e
+# endif
+# ifndef SUBLANG_FRENCH_HAITI
+# define SUBLANG_FRENCH_HAITI 0x0f
+# endif
+# ifndef SUBLANG_FRISIAN_NETHERLANDS
+# define SUBLANG_FRISIAN_NETHERLANDS 0x01
+# endif
+# ifndef SUBLANG_GALICIAN_SPAIN
+# define SUBLANG_GALICIAN_SPAIN 0x01
+# endif
+# ifndef SUBLANG_GEORGIAN_GEORGIA
+# define SUBLANG_GEORGIAN_GEORGIA 0x01
+# endif
+# ifndef SUBLANG_GERMAN_LUXEMBOURG
+# define SUBLANG_GERMAN_LUXEMBOURG 0x04
+# endif
+# ifndef SUBLANG_GERMAN_LIECHTENSTEIN
+# define SUBLANG_GERMAN_LIECHTENSTEIN 0x05
+# endif
+# ifndef SUBLANG_GREEK_GREECE
+# define SUBLANG_GREEK_GREECE 0x01
+# endif
+# ifndef SUBLANG_GREENLANDIC_GREENLAND
+# define SUBLANG_GREENLANDIC_GREENLAND 0x01
+# endif
+# ifndef SUBLANG_GUJARATI_INDIA
+# define SUBLANG_GUJARATI_INDIA 0x01
+# endif
+# ifndef SUBLANG_HAUSA_NIGERIA_LATIN
+# define SUBLANG_HAUSA_NIGERIA_LATIN 0x01
+# endif
+# ifndef SUBLANG_HEBREW_ISRAEL
+# define SUBLANG_HEBREW_ISRAEL 0x01
+# endif
+# ifndef SUBLANG_HINDI_INDIA
+# define SUBLANG_HINDI_INDIA 0x01
+# endif
+# ifndef SUBLANG_HUNGARIAN_HUNGARY
+# define SUBLANG_HUNGARIAN_HUNGARY 0x01
+# endif
+# ifndef SUBLANG_ICELANDIC_ICELAND
+# define SUBLANG_ICELANDIC_ICELAND 0x01
+# endif
+# ifndef SUBLANG_IGBO_NIGERIA
+# define SUBLANG_IGBO_NIGERIA 0x01
+# endif
+# ifndef SUBLANG_INDONESIAN_INDONESIA
+# define SUBLANG_INDONESIAN_INDONESIA 0x01
+# endif
+# ifndef SUBLANG_INUKTITUT_CANADA
+# define SUBLANG_INUKTITUT_CANADA 0x01
+# endif
+# undef SUBLANG_INUKTITUT_CANADA_LATIN
+# define SUBLANG_INUKTITUT_CANADA_LATIN 0x02
+# undef SUBLANG_IRISH_IRELAND
+# define SUBLANG_IRISH_IRELAND 0x02
+# ifndef SUBLANG_JAPANESE_JAPAN
+# define SUBLANG_JAPANESE_JAPAN 0x01
+# endif
+# ifndef SUBLANG_KANNADA_INDIA
+# define SUBLANG_KANNADA_INDIA 0x01
+# endif
+# ifndef SUBLANG_KASHMIRI_INDIA
+# define SUBLANG_KASHMIRI_INDIA 0x02
+# endif
+# ifndef SUBLANG_KAZAK_KAZAKHSTAN
+# define SUBLANG_KAZAK_KAZAKHSTAN 0x01
+# endif
+# ifndef SUBLANG_KICHE_GUATEMALA
+# define SUBLANG_KICHE_GUATEMALA 0x01
+# endif
+# ifndef SUBLANG_KINYARWANDA_RWANDA
+# define SUBLANG_KINYARWANDA_RWANDA 0x01
+# endif
+# ifndef SUBLANG_KONKANI_INDIA
+# define SUBLANG_KONKANI_INDIA 0x01
+# endif
+# ifndef SUBLANG_KYRGYZ_KYRGYZSTAN
+# define SUBLANG_KYRGYZ_KYRGYZSTAN 0x01
+# endif
+# ifndef SUBLANG_LAO_LAOS
+# define SUBLANG_LAO_LAOS 0x01
+# endif
+# ifndef SUBLANG_LATVIAN_LATVIA
+# define SUBLANG_LATVIAN_LATVIA 0x01
+# endif
+# ifndef SUBLANG_LITHUANIAN_LITHUANIA
+# define SUBLANG_LITHUANIAN_LITHUANIA 0x01
+# endif
+# undef SUBLANG_LOWER_SORBIAN_GERMANY
+# define SUBLANG_LOWER_SORBIAN_GERMANY 0x02
+# ifndef SUBLANG_LUXEMBOURGISH_LUXEMBOURG
+# define SUBLANG_LUXEMBOURGISH_LUXEMBOURG 0x01
+# endif
+# ifndef SUBLANG_MACEDONIAN_MACEDONIA
+# define SUBLANG_MACEDONIAN_MACEDONIA 0x01
+# endif
+# ifndef SUBLANG_MALAY_MALAYSIA
+# define SUBLANG_MALAY_MALAYSIA 0x01
+# endif
+# ifndef SUBLANG_MALAY_BRUNEI_DARUSSALAM
+# define SUBLANG_MALAY_BRUNEI_DARUSSALAM 0x02
+# endif
+# ifndef SUBLANG_MALAYALAM_INDIA
+# define SUBLANG_MALAYALAM_INDIA 0x01
+# endif
+# ifndef SUBLANG_MALTESE_MALTA
+# define SUBLANG_MALTESE_MALTA 0x01
+# endif
+# ifndef SUBLANG_MAORI_NEW_ZEALAND
+# define SUBLANG_MAORI_NEW_ZEALAND 0x01
+# endif
+# ifndef SUBLANG_MAPUDUNGUN_CHILE
+# define SUBLANG_MAPUDUNGUN_CHILE 0x01
+# endif
+# ifndef SUBLANG_MARATHI_INDIA
+# define SUBLANG_MARATHI_INDIA 0x01
+# endif
+# ifndef SUBLANG_MOHAWK_CANADA
+# define SUBLANG_MOHAWK_CANADA 0x01
+# endif
+# ifndef SUBLANG_MONGOLIAN_CYRILLIC_MONGOLIA
+# define SUBLANG_MONGOLIAN_CYRILLIC_MONGOLIA 0x01
+# endif
+# ifndef SUBLANG_MONGOLIAN_PRC
+# define SUBLANG_MONGOLIAN_PRC 0x02
+# endif
+# ifndef SUBLANG_NEPALI_NEPAL
+# define SUBLANG_NEPALI_NEPAL 0x01
+# endif
+# ifndef SUBLANG_NEPALI_INDIA
+# define SUBLANG_NEPALI_INDIA 0x02
+# endif
+# ifndef SUBLANG_OCCITAN_FRANCE
+# define SUBLANG_OCCITAN_FRANCE 0x01
+# endif
+# ifndef SUBLANG_ORIYA_INDIA
+# define SUBLANG_ORIYA_INDIA 0x01
+# endif
+# ifndef SUBLANG_PASHTO_AFGHANISTAN
+# define SUBLANG_PASHTO_AFGHANISTAN 0x01
+# endif
+# ifndef SUBLANG_POLISH_POLAND
+# define SUBLANG_POLISH_POLAND 0x01
+# endif
+# ifndef SUBLANG_PUNJABI_INDIA
+# define SUBLANG_PUNJABI_INDIA 0x01
+# endif
+# ifndef SUBLANG_PUNJABI_PAKISTAN
+# define SUBLANG_PUNJABI_PAKISTAN 0x02
+# endif
+# ifndef SUBLANG_QUECHUA_BOLIVIA
+# define SUBLANG_QUECHUA_BOLIVIA 0x01
+# endif
+# ifndef SUBLANG_QUECHUA_ECUADOR
+# define SUBLANG_QUECHUA_ECUADOR 0x02
+# endif
+# ifndef SUBLANG_QUECHUA_PERU
+# define SUBLANG_QUECHUA_PERU 0x03
+# endif
+# ifndef SUBLANG_ROMANIAN_ROMANIA
+# define SUBLANG_ROMANIAN_ROMANIA 0x01
+# endif
+# ifndef SUBLANG_ROMANIAN_MOLDOVA
+# define SUBLANG_ROMANIAN_MOLDOVA 0x02
+# endif
+# ifndef SUBLANG_ROMANSH_SWITZERLAND
+# define SUBLANG_ROMANSH_SWITZERLAND 0x01
+# endif
+# ifndef SUBLANG_RUSSIAN_RUSSIA
+# define SUBLANG_RUSSIAN_RUSSIA 0x01
+# endif
+# ifndef SUBLANG_RUSSIAN_MOLDAVIA
+# define SUBLANG_RUSSIAN_MOLDAVIA 0x02
+# endif
+# ifndef SUBLANG_SAMI_NORTHERN_NORWAY
+# define SUBLANG_SAMI_NORTHERN_NORWAY 0x01
+# endif
+# ifndef SUBLANG_SAMI_NORTHERN_SWEDEN
+# define SUBLANG_SAMI_NORTHERN_SWEDEN 0x02
+# endif
+# ifndef SUBLANG_SAMI_NORTHERN_FINLAND
+# define SUBLANG_SAMI_NORTHERN_FINLAND 0x03
+# endif
+# ifndef SUBLANG_SAMI_LULE_NORWAY
+# define SUBLANG_SAMI_LULE_NORWAY 0x04
+# endif
+# ifndef SUBLANG_SAMI_LULE_SWEDEN
+# define SUBLANG_SAMI_LULE_SWEDEN 0x05
+# endif
+# ifndef SUBLANG_SAMI_SOUTHERN_NORWAY
+# define SUBLANG_SAMI_SOUTHERN_NORWAY 0x06
+# endif
+# ifndef SUBLANG_SAMI_SOUTHERN_SWEDEN
+# define SUBLANG_SAMI_SOUTHERN_SWEDEN 0x07
+# endif
+# undef SUBLANG_SAMI_SKOLT_FINLAND
+# define SUBLANG_SAMI_SKOLT_FINLAND 0x08
+# undef SUBLANG_SAMI_INARI_FINLAND
+# define SUBLANG_SAMI_INARI_FINLAND 0x09
+# ifndef SUBLANG_SANSKRIT_INDIA
+# define SUBLANG_SANSKRIT_INDIA 0x01
+# endif
+# ifndef SUBLANG_SERBIAN_LATIN
+# define SUBLANG_SERBIAN_LATIN 0x02
+# endif
+# ifndef SUBLANG_SERBIAN_CYRILLIC
+# define SUBLANG_SERBIAN_CYRILLIC 0x03
+# endif
+# ifndef SUBLANG_SINDHI_INDIA
+# define SUBLANG_SINDHI_INDIA 0x01
+# endif
+# undef SUBLANG_SINDHI_PAKISTAN
+# define SUBLANG_SINDHI_PAKISTAN 0x02
+# ifndef SUBLANG_SINDHI_AFGHANISTAN
+# define SUBLANG_SINDHI_AFGHANISTAN 0x02
+# endif
+# ifndef SUBLANG_SINHALESE_SRI_LANKA
+# define SUBLANG_SINHALESE_SRI_LANKA 0x01
+# endif
+# ifndef SUBLANG_SLOVAK_SLOVAKIA
+# define SUBLANG_SLOVAK_SLOVAKIA 0x01
+# endif
+# ifndef SUBLANG_SLOVENIAN_SLOVENIA
+# define SUBLANG_SLOVENIAN_SLOVENIA 0x01
+# endif
+# ifndef SUBLANG_SOTHO_SOUTH_AFRICA
+# define SUBLANG_SOTHO_SOUTH_AFRICA 0x01
+# endif
+# ifndef SUBLANG_SPANISH_GUATEMALA
+# define SUBLANG_SPANISH_GUATEMALA 0x04
+# endif
+# ifndef SUBLANG_SPANISH_COSTA_RICA
+# define SUBLANG_SPANISH_COSTA_RICA 0x05
+# endif
+# ifndef SUBLANG_SPANISH_PANAMA
+# define SUBLANG_SPANISH_PANAMA 0x06
+# endif
+# ifndef SUBLANG_SPANISH_DOMINICAN_REPUBLIC
+# define SUBLANG_SPANISH_DOMINICAN_REPUBLIC 0x07
+# endif
+# ifndef SUBLANG_SPANISH_VENEZUELA
+# define SUBLANG_SPANISH_VENEZUELA 0x08
+# endif
+# ifndef SUBLANG_SPANISH_COLOMBIA
+# define SUBLANG_SPANISH_COLOMBIA 0x09
+# endif
+# ifndef SUBLANG_SPANISH_PERU
+# define SUBLANG_SPANISH_PERU 0x0a
+# endif
+# ifndef SUBLANG_SPANISH_ARGENTINA
+# define SUBLANG_SPANISH_ARGENTINA 0x0b
+# endif
+# ifndef SUBLANG_SPANISH_ECUADOR
+# define SUBLANG_SPANISH_ECUADOR 0x0c
+# endif
+# ifndef SUBLANG_SPANISH_CHILE
+# define SUBLANG_SPANISH_CHILE 0x0d
+# endif
+# ifndef SUBLANG_SPANISH_URUGUAY
+# define SUBLANG_SPANISH_URUGUAY 0x0e
+# endif
+# ifndef SUBLANG_SPANISH_PARAGUAY
+# define SUBLANG_SPANISH_PARAGUAY 0x0f
+# endif
+# ifndef SUBLANG_SPANISH_BOLIVIA
+# define SUBLANG_SPANISH_BOLIVIA 0x10
+# endif
+# ifndef SUBLANG_SPANISH_EL_SALVADOR
+# define SUBLANG_SPANISH_EL_SALVADOR 0x11
+# endif
+# ifndef SUBLANG_SPANISH_HONDURAS
+# define SUBLANG_SPANISH_HONDURAS 0x12
+# endif
+# ifndef SUBLANG_SPANISH_NICARAGUA
+# define SUBLANG_SPANISH_NICARAGUA 0x13
+# endif
+# ifndef SUBLANG_SPANISH_PUERTO_RICO
+# define SUBLANG_SPANISH_PUERTO_RICO 0x14
+# endif
+# ifndef SUBLANG_SPANISH_US
+# define SUBLANG_SPANISH_US 0x15
+# endif
+# ifndef SUBLANG_SWAHILI_KENYA
+# define SUBLANG_SWAHILI_KENYA 0x01
+# endif
+# ifndef SUBLANG_SWEDISH_SWEDEN
+# define SUBLANG_SWEDISH_SWEDEN 0x01
+# endif
+# ifndef SUBLANG_SWEDISH_FINLAND
+# define SUBLANG_SWEDISH_FINLAND 0x02
+# endif
+# ifndef SUBLANG_SYRIAC_SYRIA
+# define SUBLANG_SYRIAC_SYRIA 0x01
+# endif
+# ifndef SUBLANG_TAGALOG_PHILIPPINES
+# define SUBLANG_TAGALOG_PHILIPPINES 0x01
+# endif
+# ifndef SUBLANG_TAJIK_TAJIKISTAN
+# define SUBLANG_TAJIK_TAJIKISTAN 0x01
+# endif
+# ifndef SUBLANG_TAMAZIGHT_ARABIC
+# define SUBLANG_TAMAZIGHT_ARABIC 0x01
+# endif
+# ifndef SUBLANG_TAMAZIGHT_ALGERIA_LATIN
+# define SUBLANG_TAMAZIGHT_ALGERIA_LATIN 0x02
+# endif
+# ifndef SUBLANG_TAMIL_INDIA
+# define SUBLANG_TAMIL_INDIA 0x01
+# endif
+# ifndef SUBLANG_TATAR_RUSSIA
+# define SUBLANG_TATAR_RUSSIA 0x01
+# endif
+# ifndef SUBLANG_TELUGU_INDIA
+# define SUBLANG_TELUGU_INDIA 0x01
+# endif
+# ifndef SUBLANG_THAI_THAILAND
+# define SUBLANG_THAI_THAILAND 0x01
+# endif
+# ifndef SUBLANG_TIBETAN_PRC
+# define SUBLANG_TIBETAN_PRC 0x01
+# endif
+# undef SUBLANG_TIBETAN_BHUTAN
+# define SUBLANG_TIBETAN_BHUTAN 0x02
+# ifndef SUBLANG_TIGRINYA_ETHIOPIA
+# define SUBLANG_TIGRINYA_ETHIOPIA 0x01
+# endif
+# ifndef SUBLANG_TIGRINYA_ERITREA
+# define SUBLANG_TIGRINYA_ERITREA 0x02
+# endif
+# ifndef SUBLANG_TSWANA_SOUTH_AFRICA
+# define SUBLANG_TSWANA_SOUTH_AFRICA 0x01
+# endif
+# ifndef SUBLANG_TURKISH_TURKEY
+# define SUBLANG_TURKISH_TURKEY 0x01
+# endif
+# ifndef SUBLANG_TURKMEN_TURKMENISTAN
+# define SUBLANG_TURKMEN_TURKMENISTAN 0x01
+# endif
+# ifndef SUBLANG_UIGHUR_PRC
+# define SUBLANG_UIGHUR_PRC 0x01
+# endif
+# ifndef SUBLANG_UKRAINIAN_UKRAINE
+# define SUBLANG_UKRAINIAN_UKRAINE 0x01
+# endif
+# ifndef SUBLANG_UPPER_SORBIAN_GERMANY
+# define SUBLANG_UPPER_SORBIAN_GERMANY 0x01
+# endif
+# ifndef SUBLANG_URDU_PAKISTAN
+# define SUBLANG_URDU_PAKISTAN 0x01
+# endif
+# ifndef SUBLANG_URDU_INDIA
+# define SUBLANG_URDU_INDIA 0x02
+# endif
+# ifndef SUBLANG_UZBEK_LATIN
+# define SUBLANG_UZBEK_LATIN 0x01
+# endif
+# ifndef SUBLANG_UZBEK_CYRILLIC
+# define SUBLANG_UZBEK_CYRILLIC 0x02
+# endif
+# ifndef SUBLANG_VIETNAMESE_VIETNAM
+# define SUBLANG_VIETNAMESE_VIETNAM 0x01
+# endif
+# ifndef SUBLANG_WELSH_UNITED_KINGDOM
+# define SUBLANG_WELSH_UNITED_KINGDOM 0x01
+# endif
+# ifndef SUBLANG_WOLOF_SENEGAL
+# define SUBLANG_WOLOF_SENEGAL 0x01
+# endif
+# ifndef SUBLANG_XHOSA_SOUTH_AFRICA
+# define SUBLANG_XHOSA_SOUTH_AFRICA 0x01
+# endif
+# ifndef SUBLANG_YAKUT_RUSSIA
+# define SUBLANG_YAKUT_RUSSIA 0x01
+# endif
+# ifndef SUBLANG_YI_PRC
+# define SUBLANG_YI_PRC 0x01
+# endif
+# ifndef SUBLANG_YORUBA_NIGERIA
+# define SUBLANG_YORUBA_NIGERIA 0x01
+# endif
+# ifndef SUBLANG_ZULU_SOUTH_AFRICA
+# define SUBLANG_ZULU_SOUTH_AFRICA 0x01
+# endif
+/* GetLocaleInfoA operations.  */
+# ifndef LOCALE_SNAME
+# define LOCALE_SNAME 0x5c
+# endif
+# ifndef LOCALE_NAME_MAX_LENGTH
+# define LOCALE_NAME_MAX_LENGTH 85
+# endif
+/* Don't assume that UNICODE is not defined.  */
+# undef GetLocaleInfo
+# define GetLocaleInfo GetLocaleInfoA
+# undef EnumSystemLocales
+# define EnumSystemLocales EnumSystemLocalesA
+#endif
+
+/* We want to use the system's setlocale() function here, not the gnulib
+   override.  */
+#undef setlocale
+
+
+#if HAVE_CFPREFERENCESCOPYAPPVALUE
+/* Mac OS X 10.4 or newer */
+
+/* Canonicalize a Mac OS X locale name to a Unix locale name.
+   NAME is a sufficiently large buffer.
+   On input, it contains the Mac OS X locale name.
+   On output, it contains the Unix locale name.  */
+# if !defined IN_LIBINTL
+static
+# endif
+void
+gl_locale_name_canonicalize (char *name)
+{
+  /* This conversion is based on a posting by
+     Deborah GoldSmith <goldsmit@apple.com> on 2005-03-08,
+     https://lists.apple.com/archives/carbon-dev/2005/Mar/msg00293.html */
+
+  /* Convert legacy (NeXTstep inherited) English names to Unix (ISO 639 and
+     ISO 3166) names.  Prior to Mac OS X 10.3, there is no API for doing this.
+     Therefore we do it ourselves, using a table based on the results of the
+     Mac OS X 10.3.8 function
+     CFLocaleCreateCanonicalLocaleIdentifierFromString().  */
+  typedef struct { const char legacy[21+1]; const char unixy[5+1]; }
+          legacy_entry;
+  static const legacy_entry legacy_table[] = {
+    { "Afrikaans",             "af" },
+    { "Albanian",              "sq" },
+    { "Amharic",               "am" },
+    { "Arabic",                "ar" },
+    { "Armenian",              "hy" },
+    { "Assamese",              "as" },
+    { "Aymara",                "ay" },
+    { "Azerbaijani",           "az" },
+    { "Basque",                "eu" },
+    { "Belarusian",            "be" },
+    { "Belorussian",           "be" },
+    { "Bengali",               "bn" },
+    { "Brazilian Portugese",   "pt_BR" },
+    { "Brazilian Portuguese",  "pt_BR" },
+    { "Breton",                "br" },
+    { "Bulgarian",             "bg" },
+    { "Burmese",               "my" },
+    { "Byelorussian",          "be" },
+    { "Catalan",               "ca" },
+    { "Chewa",                 "ny" },
+    { "Chichewa",              "ny" },
+    { "Chinese",               "zh" },
+    { "Chinese, Simplified",   "zh_CN" },
+    { "Chinese, Traditional",  "zh_TW" },
+    { "Chinese, Tradtional",   "zh_TW" },
+    { "Croatian",              "hr" },
+    { "Czech",                 "cs" },
+    { "Danish",                "da" },
+    { "Dutch",                 "nl" },
+    { "Dzongkha",              "dz" },
+    { "English",               "en" },
+    { "Esperanto",             "eo" },
+    { "Estonian",              "et" },
+    { "Faroese",               "fo" },
+    { "Farsi",                 "fa" },
+    { "Finnish",               "fi" },
+    { "Flemish",               "nl_BE" },
+    { "French",                "fr" },
+    { "Galician",              "gl" },
+    { "Gallegan",              "gl" },
+    { "Georgian",              "ka" },
+    { "German",                "de" },
+    { "Greek",                 "el" },
+    { "Greenlandic",           "kl" },
+    { "Guarani",               "gn" },
+    { "Gujarati",              "gu" },
+    { "Hawaiian",              "haw" }, /* Yes, "haw", not "cpe".  */
+    { "Hebrew",                "he" },
+    { "Hindi",                 "hi" },
+    { "Hungarian",             "hu" },
+    { "Icelandic",             "is" },
+    { "Indonesian",            "id" },
+    { "Inuktitut",             "iu" },
+    { "Irish",                 "ga" },
+    { "Italian",               "it" },
+    { "Japanese",              "ja" },
+    { "Javanese",              "jv" },
+    { "Kalaallisut",           "kl" },
+    { "Kannada",               "kn" },
+    { "Kashmiri",              "ks" },
+    { "Kazakh",                "kk" },
+    { "Khmer",                 "km" },
+    { "Kinyarwanda",           "rw" },
+    { "Kirghiz",               "ky" },
+    { "Korean",                "ko" },
+    { "Kurdish",               "ku" },
+    { "Latin",                 "la" },
+    { "Latvian",               "lv" },
+    { "Lithuanian",            "lt" },
+    { "Macedonian",            "mk" },
+    { "Malagasy",              "mg" },
+    { "Malay",                 "ms" },
+    { "Malayalam",             "ml" },
+    { "Maltese",               "mt" },
+    { "Manx",                  "gv" },
+    { "Marathi",               "mr" },
+    { "Moldavian",             "mo" },
+    { "Mongolian",             "mn" },
+    { "Nepali",                "ne" },
+    { "Norwegian",             "nb" }, /* Yes, "nb", not the obsolete "no".  */
+    { "Nyanja",                "ny" },
+    { "Nynorsk",               "nn" },
+    { "Oriya",                 "or" },
+    { "Oromo",                 "om" },
+    { "Panjabi",               "pa" },
+    { "Pashto",                "ps" },
+    { "Persian",               "fa" },
+    { "Polish",                "pl" },
+    { "Portuguese",            "pt" },
+    { "Portuguese, Brazilian", "pt_BR" },
+    { "Punjabi",               "pa" },
+    { "Pushto",                "ps" },
+    { "Quechua",               "qu" },
+    { "Romanian",              "ro" },
+    { "Ruanda",                "rw" },
+    { "Rundi",                 "rn" },
+    { "Russian",               "ru" },
+    { "Sami",                  "se_NO" }, /* Not just "se".  */
+    { "Sanskrit",              "sa" },
+    { "Scottish",              "gd" },
+    { "Serbian",               "sr" },
+    { "Simplified Chinese",    "zh_CN" },
+    { "Sindhi",                "sd" },
+    { "Sinhalese",             "si" },
+    { "Slovak",                "sk" },
+    { "Slovenian",             "sl" },
+    { "Somali",                "so" },
+    { "Spanish",               "es" },
+    { "Sundanese",             "su" },
+    { "Swahili",               "sw" },
+    { "Swedish",               "sv" },
+    { "Tagalog",               "tl" },
+    { "Tajik",                 "tg" },
+    { "Tajiki",                "tg" },
+    { "Tamil",                 "ta" },
+    { "Tatar",                 "tt" },
+    { "Telugu",                "te" },
+    { "Thai",                  "th" },
+    { "Tibetan",               "bo" },
+    { "Tigrinya",              "ti" },
+    { "Tongan",                "to" },
+    { "Traditional Chinese",   "zh_TW" },
+    { "Turkish",               "tr" },
+    { "Turkmen",               "tk" },
+    { "Uighur",                "ug" },
+    { "Ukrainian",             "uk" },
+    { "Urdu",                  "ur" },
+    { "Uzbek",                 "uz" },
+    { "Vietnamese",            "vi" },
+    { "Welsh",                 "cy" },
+    { "Yiddish",               "yi" }
+  };
+
+  /* Convert new-style locale names with language tags (ISO 639 and ISO 15924)
+     to Unix (ISO 639 and ISO 3166) names.  */
+  typedef struct { const char langtag[7+1]; const char unixy[12+1]; }
+          langtag_entry;
+  static const langtag_entry langtag_table[] = {
+    /* Mac OS X has "az-Arab", "az-Cyrl", "az-Latn".
+       The default script for az on Unix is Latin.  */
+    { "az-Latn", "az" },
+    /* Mac OS X has "bs-Cyrl", "bs-Latn".
+       The default script for bs on Unix is Latin.  */
+    { "bs-Latn", "bs" },
+    /* Mac OS X has "ga-dots".  Does not yet exist on Unix.  */
+    { "ga-dots", "ga" },
+    /* Mac OS X has "kk-Cyrl".
+       The default script for kk on Unix is Cyrillic.  */
+    { "kk-Cyrl", "kk" },
+    /* Mac OS X has "mn-Cyrl", "mn-Mong".
+       The default script for mn on Unix is Cyrillic.  */
+    { "mn-Cyrl", "mn" },
+    /* Mac OS X has "ms-Arab", "ms-Latn".
+       The default script for ms on Unix is Latin.  */
+    { "ms-Latn", "ms" },
+    /* Mac OS X has "pa-Arab", "pa-Guru".
+       Country codes are used to distinguish these on Unix.  */
+    { "pa-Arab", "pa_PK" },
+    { "pa-Guru", "pa_IN" },
+    /* Mac OS X has "shi-Latn", "shi-Tfng".  Does not yet exist on Unix.  */
+    /* Mac OS X has "sr-Cyrl", "sr-Latn".
+       The default script for sr on Unix is Cyrillic.  */
+    { "sr-Cyrl", "sr" },
+    /* Mac OS X has "tg-Cyrl".
+       The default script for tg on Unix is Cyrillic.  */
+    { "tg-Cyrl", "tg" },
+    /* Mac OS X has "tk-Cyrl".
+       The default script for tk on Unix is Cyrillic.  */
+    { "tk-Cyrl", "tk" },
+    /* Mac OS X has "tt-Cyrl".
+       The default script for tt on Unix is Cyrillic.  */
+    { "tt-Cyrl", "tt" },
+    /* Mac OS X has "uz-Arab", "uz-Cyrl", "uz-Latn".
+       The default script for uz on Unix is Latin.  */
+    { "uz-Latn", "uz" },
+    /* Mac OS X has "vai-Latn", "vai-Vaii".  Does not yet exist on Unix.  */
+    /* Mac OS X has "yue-Hans", "yue-Hant".
+       The default script for yue on Unix is Simplified Han.  */
+    { "yue-Hans", "yue" },
+    /* Mac OS X has "zh-Hans", "zh-Hant".
+       Country codes are used to distinguish these on Unix.  */
+    { "zh-Hans", "zh_CN" },
+    { "zh-Hant", "zh_TW" }
+  };
+
+  /* Convert script names (ISO 15924) to Unix conventions.
+     See https://www.unicode.org/iso15924/iso15924-codes.html  */
+  typedef struct { const char script[4+1]; const char unixy[9+1]; }
+          script_entry;
+  static const script_entry script_table[] = {
+    { "Arab", "arabic" },
+    { "Cyrl", "cyrillic" },
+    { "Latn", "latin" },
+    { "Mong", "mongolian" }
+  };
+
+  /* Step 1: Convert using legacy_table.  */
+  if (name[0] >= 'A' && name[0] <= 'Z')
+    {
+      unsigned int i1, i2;
+      i1 = 0;
+      i2 = sizeof (legacy_table) / sizeof (legacy_entry);
+      while (i2 - i1 > 1)
+        {
+          /* At this point we know that if name occurs in legacy_table,
+             its index must be >= i1 and < i2.  */
+          unsigned int i = (i1 + i2) >> 1;
+          const legacy_entry *p = &legacy_table[i];
+          if (strcmp (name, p->legacy) < 0)
+            i2 = i;
+          else
+            i1 = i;
+        }
+      if (strcmp (name, legacy_table[i1].legacy) == 0)
+        {
+          strcpy (name, legacy_table[i1].unixy);
+          return;
+        }
+    }
+
+  /* Step 2: Convert using langtag_table and script_table.  */
+  if (strlen (name) == 7 && name[2] == '-')
+    {
+      unsigned int i1, i2;
+      i1 = 0;
+      i2 = sizeof (langtag_table) / sizeof (langtag_entry);
+      while (i2 - i1 > 1)
+        {
+          /* At this point we know that if name occurs in langtag_table,
+             its index must be >= i1 and < i2.  */
+          unsigned int i = (i1 + i2) >> 1;
+          const langtag_entry *p = &langtag_table[i];
+          if (strcmp (name, p->langtag) < 0)
+            i2 = i;
+          else
+            i1 = i;
+        }
+      if (strcmp (name, langtag_table[i1].langtag) == 0)
+        {
+          strcpy (name, langtag_table[i1].unixy);
+          return;
+        }
+
+      i1 = 0;
+      i2 = sizeof (script_table) / sizeof (script_entry);
+      while (i2 - i1 > 1)
+        {
+          /* At this point we know that if (name + 3) occurs in script_table,
+             its index must be >= i1 and < i2.  */
+          unsigned int i = (i1 + i2) >> 1;
+          const script_entry *p = &script_table[i];
+          if (strcmp (name + 3, p->script) < 0)
+            i2 = i;
+          else
+            i1 = i;
+        }
+      if (strcmp (name + 3, script_table[i1].script) == 0)
+        {
+          name[2] = '@';
+          strcpy (name + 3, script_table[i1].unixy);
+          return;
+        }
+    }
+
+  /* Step 3: Convert new-style dash to Unix underscore. */
+  {
+    char *p;
+    for (p = name; *p != '\0'; p++)
+      if (*p == '-')
+        *p = '_';
+  }
+}
+
+#endif
+
+
+#if defined WINDOWS_NATIVE || defined __CYGWIN__ /* Native Windows or Cygwin */
+
+/* Canonicalize a Windows native locale name to a Unix locale name.
+   NAME is a sufficiently large buffer.
+   On input, it contains the Windows locale name.
+   On output, it contains the Unix locale name.  */
+# if !defined IN_LIBINTL
+static
+# endif
+void
+gl_locale_name_canonicalize (char *name)
+{
+  /* FIXME: This is probably incomplete: it does not handle "zh-Hans" and
+     "zh-Hant".  */
+  char *p;
+
+  for (p = name; *p != '\0'; p++)
+    if (*p == '-')
+      {
+        *p = '_';
+        p++;
+        for (; *p != '\0'; p++)
+          {
+            if (*p >= 'a' && *p <= 'z')
+              *p += 'A' - 'a';
+            if (*p == '-')
+              {
+                *p = '\0';
+                return;
+              }
+          }
+        return;
+      }
+}
+
+# if !defined IN_LIBINTL
+static
+# endif
+const char *
+gl_locale_name_from_win32_LANGID (LANGID langid)
+{
+  /* Activate the new code only when the GETTEXT_MUI environment variable is
+     set, for the time being, since the new code is not well tested.  */
+  if (getenv ("GETTEXT_MUI") != NULL)
+    {
+      static char namebuf[256];
+
+      /* Query the system's notion of locale name.
+         On Windows95/98/ME, GetLocaleInfoA returns some incorrect results.
+         But we don't need to support systems that are so old.  */
+      if (GetLocaleInfoA (MAKELCID (langid, SORT_DEFAULT), LOCALE_SNAME,
+                          namebuf, sizeof (namebuf) - 1))
+        {
+          /* Convert it to a Unix locale name.  */
+          gl_locale_name_canonicalize (namebuf);
+          return namebuf;
+        }
+    }
+  /* Internet Explorer has an LCID to RFC3066 name mapping stored in
+     HKEY_CLASSES_ROOT\Mime\Database\Rfc1766.  But we better don't use that
+     since IE's i18n subsystem is known to be inconsistent with the native
+     Windows base (e.g. they have different character conversion facilities
+     that produce different results).  */
+  /* Use our own table.  */
+  {
+    int primary, sub;
+
+    /* Split into language and territory part.  */
+    primary = PRIMARYLANGID (langid);
+    sub = SUBLANGID (langid);
+
+    /* Dispatch on language.
+       See also https://www.unicode.org/unicode/onlinedat/languages.html .
+       For details about languages, see https://www.ethnologue.com/ .  */
+    switch (primary)
+      {
+      case LANG_AFRIKAANS:
+        switch (sub)
+          {
+          case SUBLANG_AFRIKAANS_SOUTH_AFRICA: return "af_ZA";
+          }
+        return "af";
+      case LANG_ALBANIAN:
+        switch (sub)
+          {
+          case SUBLANG_ALBANIAN_ALBANIA: return "sq_AL";
+          }
+        return "sq";
+      case LANG_ALSATIAN:
+        switch (sub)
+          {
+          case SUBLANG_ALSATIAN_FRANCE: return "gsw_FR";
+          }
+        return "gsw";
+      case LANG_AMHARIC:
+        switch (sub)
+          {
+          case SUBLANG_AMHARIC_ETHIOPIA: return "am_ET";
+          }
+        return "am";
+      case LANG_ARABIC:
+        switch (sub)
+          {
+          case SUBLANG_ARABIC_SAUDI_ARABIA: return "ar_SA";
+          case SUBLANG_ARABIC_IRAQ: return "ar_IQ";
+          case SUBLANG_ARABIC_EGYPT: return "ar_EG";
+          case SUBLANG_ARABIC_LIBYA: return "ar_LY";
+          case SUBLANG_ARABIC_ALGERIA: return "ar_DZ";
+          case SUBLANG_ARABIC_MOROCCO: return "ar_MA";
+          case SUBLANG_ARABIC_TUNISIA: return "ar_TN";
+          case SUBLANG_ARABIC_OMAN: return "ar_OM";
+          case SUBLANG_ARABIC_YEMEN: return "ar_YE";
+          case SUBLANG_ARABIC_SYRIA: return "ar_SY";
+          case SUBLANG_ARABIC_JORDAN: return "ar_JO";
+          case SUBLANG_ARABIC_LEBANON: return "ar_LB";
+          case SUBLANG_ARABIC_KUWAIT: return "ar_KW";
+          case SUBLANG_ARABIC_UAE: return "ar_AE";
+          case SUBLANG_ARABIC_BAHRAIN: return "ar_BH";
+          case SUBLANG_ARABIC_QATAR: return "ar_QA";
+          }
+        return "ar";
+      case LANG_ARMENIAN:
+        switch (sub)
+          {
+          case SUBLANG_ARMENIAN_ARMENIA: return "hy_AM";
+          }
+        return "hy";
+      case LANG_ASSAMESE:
+        switch (sub)
+          {
+          case SUBLANG_ASSAMESE_INDIA: return "as_IN";
+          }
+        return "as";
+      case LANG_AZERI:
+        switch (sub)
+          {
+          /* FIXME: Adjust this when Azerbaijani locales appear on Unix.  */
+          case 0x1e: return "az@latin";
+          case SUBLANG_AZERI_LATIN: return "az_AZ@latin";
+          case 0x1d: return "az@cyrillic";
+          case SUBLANG_AZERI_CYRILLIC: return "az_AZ@cyrillic";
+          }
+        return "az";
+      case LANG_BASHKIR:
+        switch (sub)
+          {
+          case SUBLANG_BASHKIR_RUSSIA: return "ba_RU";
+          }
+        return "ba";
+      case LANG_BASQUE:
+        switch (sub)
+          {
+          case SUBLANG_BASQUE_BASQUE: return "eu_ES";
+          }
+        return "eu"; /* Ambiguous: could be "eu_ES" or "eu_FR".  */
+      case LANG_BELARUSIAN:
+        switch (sub)
+          {
+          case SUBLANG_BELARUSIAN_BELARUS: return "be_BY";
+          }
+        return "be";
+      case LANG_BENGALI:
+        switch (sub)
+          {
+          case SUBLANG_BENGALI_INDIA: return "bn_IN";
+          case SUBLANG_BENGALI_BANGLADESH: return "bn_BD";
+          }
+        return "bn";
+      case LANG_BRETON:
+        switch (sub)
+          {
+          case SUBLANG_BRETON_FRANCE: return "br_FR";
+          }
+        return "br";
+      case LANG_BULGARIAN:
+        switch (sub)
+          {
+          case SUBLANG_BULGARIAN_BULGARIA: return "bg_BG";
+          }
+        return "bg";
+      case LANG_BURMESE:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "my_MM";
+          }
+        return "my";
+      case LANG_CAMBODIAN:
+        switch (sub)
+          {
+          case SUBLANG_CAMBODIAN_CAMBODIA: return "km_KH";
+          }
+        return "km";
+      case LANG_CATALAN:
+        switch (sub)
+          {
+          case SUBLANG_CATALAN_SPAIN: return "ca_ES";
+          }
+        return "ca";
+      case LANG_CHEROKEE:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "chr_US";
+          }
+        return "chr";
+      case LANG_CHINESE:
+        switch (sub)
+          {
+          case SUBLANG_CHINESE_TRADITIONAL: case 0x1f: return "zh_TW";
+          case SUBLANG_CHINESE_SIMPLIFIED: case 0x00: return "zh_CN";
+          case SUBLANG_CHINESE_HONGKONG: return "zh_HK"; /* traditional */
+          case SUBLANG_CHINESE_SINGAPORE: return "zh_SG"; /* simplified */
+          case SUBLANG_CHINESE_MACAU: return "zh_MO"; /* traditional */
+          }
+        return "zh";
+      case LANG_CORSICAN:
+        switch (sub)
+          {
+          case SUBLANG_CORSICAN_FRANCE: return "co_FR";
+          }
+        return "co";
+      case LANG_CROATIAN:      /* LANG_CROATIAN == LANG_SERBIAN == LANG_BOSNIAN
+                                * What used to be called Serbo-Croatian
+                                * should really now be two separate
+                                * languages because of political reasons.
+                                * (Says tml, who knows nothing about Serbian
+                                * or Croatian.)
+                                * (I can feel those flames coming already.)
+                                */
+        switch (sub)
+          {
+          /* Croatian */
+          case 0x00: return "hr";
+          case SUBLANG_CROATIAN_CROATIA: return "hr_HR";
+          case SUBLANG_CROATIAN_BOSNIA_HERZEGOVINA_LATIN: return "hr_BA";
+          /* Serbian */
+          case 0x1f: return "sr";
+          case 0x1c: return "sr"; /* latin */
+          case SUBLANG_SERBIAN_LATIN: return "sr_CS"; /* latin */
+          case 0x09: return "sr_RS"; /* latin */
+          case 0x0b: return "sr_ME"; /* latin */
+          case 0x06: return "sr_BA"; /* latin */
+          case 0x1b: return "sr@cyrillic";
+          case SUBLANG_SERBIAN_CYRILLIC: return "sr_CS@cyrillic";
+          case 0x0a: return "sr_RS@cyrillic";
+          case 0x0c: return "sr_ME@cyrillic";
+          case 0x07: return "sr_BA@cyrillic";
+          /* Bosnian */
+          case 0x1e: return "bs";
+          case 0x1a: return "bs"; /* latin */
+          case SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_LATIN: return "bs_BA"; /* latin */
+          case 0x19: return "bs@cyrillic";
+          case SUBLANG_BOSNIAN_BOSNIA_HERZEGOVINA_CYRILLIC: return "bs_BA@cyrillic";
+          }
+        return "hr";
+      case LANG_CZECH:
+        switch (sub)
+          {
+          case SUBLANG_CZECH_CZECH_REPUBLIC: return "cs_CZ";
+          }
+        return "cs";
+      case LANG_DANISH:
+        switch (sub)
+          {
+          case SUBLANG_DANISH_DENMARK: return "da_DK";
+          }
+        return "da";
+      case LANG_DARI:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          case SUBLANG_DARI_AFGHANISTAN: return "prs_AF";
+          }
+        return "prs";
+      case LANG_DIVEHI:
+        switch (sub)
+          {
+          case SUBLANG_DIVEHI_MALDIVES: return "dv_MV";
+          }
+        return "dv";
+      case LANG_DUTCH:
+        switch (sub)
+          {
+          case SUBLANG_DUTCH: return "nl_NL";
+          case SUBLANG_DUTCH_BELGIAN: /* FLEMISH, VLAAMS */ return "nl_BE";
+          case SUBLANG_DUTCH_SURINAM: return "nl_SR";
+          }
+        return "nl";
+      case LANG_EDO:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "bin_NG";
+          }
+        return "bin";
+      case LANG_ENGLISH:
+        switch (sub)
+          {
+          /* SUBLANG_ENGLISH_US == SUBLANG_DEFAULT. Heh. I thought
+           * English was the language spoken in England.
+           * Oh well.
+           */
+          case SUBLANG_ENGLISH_US: return "en_US";
+          case SUBLANG_ENGLISH_UK: return "en_GB";
+          case SUBLANG_ENGLISH_AUS: return "en_AU";
+          case SUBLANG_ENGLISH_CAN: return "en_CA";
+          case SUBLANG_ENGLISH_NZ: return "en_NZ";
+          case SUBLANG_ENGLISH_EIRE: return "en_IE";
+          case SUBLANG_ENGLISH_SOUTH_AFRICA: return "en_ZA";
+          case SUBLANG_ENGLISH_JAMAICA: return "en_JM";
+          case SUBLANG_ENGLISH_CARIBBEAN: return "en_GD"; /* Grenada? */
+          case SUBLANG_ENGLISH_BELIZE: return "en_BZ";
+          case SUBLANG_ENGLISH_TRINIDAD: return "en_TT";
+          case SUBLANG_ENGLISH_ZIMBABWE: return "en_ZW";
+          case SUBLANG_ENGLISH_PHILIPPINES: return "en_PH";
+          case SUBLANG_ENGLISH_INDONESIA: return "en_ID";
+          case SUBLANG_ENGLISH_HONGKONG: return "en_HK";
+          case SUBLANG_ENGLISH_INDIA: return "en_IN";
+          case SUBLANG_ENGLISH_MALAYSIA: return "en_MY";
+          case SUBLANG_ENGLISH_SINGAPORE: return "en_SG";
+          }
+        return "en";
+      case LANG_ESTONIAN:
+        switch (sub)
+          {
+          case SUBLANG_ESTONIAN_ESTONIA: return "et_EE";
+          }
+        return "et";
+      case LANG_FAEROESE:
+        switch (sub)
+          {
+          case SUBLANG_FAEROESE_FAROE_ISLANDS: return "fo_FO";
+          }
+        return "fo";
+      case LANG_FARSI:
+        switch (sub)
+          {
+          case SUBLANG_FARSI_IRAN: return "fa_IR";
+          }
+        return "fa";
+      case LANG_FINNISH:
+        switch (sub)
+          {
+          case SUBLANG_FINNISH_FINLAND: return "fi_FI";
+          }
+        return "fi";
+      case LANG_FRENCH:
+        switch (sub)
+          {
+          case SUBLANG_FRENCH: return "fr_FR";
+          case SUBLANG_FRENCH_BELGIAN: /* WALLOON */ return "fr_BE";
+          case SUBLANG_FRENCH_CANADIAN: return "fr_CA";
+          case SUBLANG_FRENCH_SWISS: return "fr_CH";
+          case SUBLANG_FRENCH_LUXEMBOURG: return "fr_LU";
+          case SUBLANG_FRENCH_MONACO: return "fr_MC";
+          case SUBLANG_FRENCH_WESTINDIES: return "fr"; /* Caribbean? */
+          case SUBLANG_FRENCH_REUNION: return "fr_RE";
+          case SUBLANG_FRENCH_CONGO: return "fr_CG";
+          case SUBLANG_FRENCH_SENEGAL: return "fr_SN";
+          case SUBLANG_FRENCH_CAMEROON: return "fr_CM";
+          case SUBLANG_FRENCH_COTEDIVOIRE: return "fr_CI";
+          case SUBLANG_FRENCH_MALI: return "fr_ML";
+          case SUBLANG_FRENCH_MOROCCO: return "fr_MA";
+          case SUBLANG_FRENCH_HAITI: return "fr_HT";
+          }
+        return "fr";
+      case LANG_FRISIAN:
+        switch (sub)
+          {
+          case SUBLANG_FRISIAN_NETHERLANDS: return "fy_NL";
+          }
+        return "fy";
+      case LANG_FULFULDE:
+        /* Spoken in Nigeria, Guinea, Senegal, Mali, Niger, Cameroon, Benin.  */
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ff_NG";
+          }
+        return "ff";
+      case LANG_GAELIC:
+        switch (sub)
+          {
+          case 0x01: /* SCOTTISH */
+            /* old, superseded by LANG_SCOTTISH_GAELIC */
+            return "gd_GB";
+          case SUBLANG_IRISH_IRELAND: return "ga_IE";
+          }
+        return "ga";
+      case LANG_GALICIAN:
+        switch (sub)
+          {
+          case SUBLANG_GALICIAN_SPAIN: return "gl_ES";
+          }
+        return "gl";
+      case LANG_GEORGIAN:
+        switch (sub)
+          {
+          case SUBLANG_GEORGIAN_GEORGIA: return "ka_GE";
+          }
+        return "ka";
+      case LANG_GERMAN:
+        switch (sub)
+          {
+          case SUBLANG_GERMAN: return "de_DE";
+          case SUBLANG_GERMAN_SWISS: return "de_CH";
+          case SUBLANG_GERMAN_AUSTRIAN: return "de_AT";
+          case SUBLANG_GERMAN_LUXEMBOURG: return "de_LU";
+          case SUBLANG_GERMAN_LIECHTENSTEIN: return "de_LI";
+          }
+        return "de";
+      case LANG_GREEK:
+        switch (sub)
+          {
+          case SUBLANG_GREEK_GREECE: return "el_GR";
+          }
+        return "el";
+      case LANG_GREENLANDIC:
+        switch (sub)
+          {
+          case SUBLANG_GREENLANDIC_GREENLAND: return "kl_GL";
+          }
+        return "kl";
+      case LANG_GUARANI:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "gn_PY";
+          }
+        return "gn";
+      case LANG_GUJARATI:
+        switch (sub)
+          {
+          case SUBLANG_GUJARATI_INDIA: return "gu_IN";
+          }
+        return "gu";
+      case LANG_HAUSA:
+        switch (sub)
+          {
+          case 0x1f: return "ha";
+          case SUBLANG_HAUSA_NIGERIA_LATIN: return "ha_NG";
+          }
+        return "ha";
+      case LANG_HAWAIIAN:
+        /* FIXME: Do they mean Hawaiian ("haw_US", 1000 speakers)
+           or Hawaii Creole English ("cpe_US", 600000 speakers)?  */
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "cpe_US";
+          }
+        return "cpe";
+      case LANG_HEBREW:
+        switch (sub)
+          {
+          case SUBLANG_HEBREW_ISRAEL: return "he_IL";
+          }
+        return "he";
+      case LANG_HINDI:
+        switch (sub)
+          {
+          case SUBLANG_HINDI_INDIA: return "hi_IN";
+          }
+        return "hi";
+      case LANG_HUNGARIAN:
+        switch (sub)
+          {
+          case SUBLANG_HUNGARIAN_HUNGARY: return "hu_HU";
+          }
+        return "hu";
+      case LANG_IBIBIO:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "nic_NG";
+          }
+        return "nic";
+      case LANG_ICELANDIC:
+        switch (sub)
+          {
+          case SUBLANG_ICELANDIC_ICELAND: return "is_IS";
+          }
+        return "is";
+      case LANG_IGBO:
+        switch (sub)
+          {
+          case SUBLANG_IGBO_NIGERIA: return "ig_NG";
+          }
+        return "ig";
+      case LANG_INDONESIAN:
+        switch (sub)
+          {
+          case SUBLANG_INDONESIAN_INDONESIA: return "id_ID";
+          }
+        return "id";
+      case LANG_INUKTITUT:
+        switch (sub)
+          {
+          case 0x1e: return "iu"; /* syllabic */
+          case SUBLANG_INUKTITUT_CANADA: return "iu_CA"; /* syllabic */
+          case 0x1f: return "iu@latin";
+          case SUBLANG_INUKTITUT_CANADA_LATIN: return "iu_CA@latin";
+          }
+        return "iu";
+      case LANG_ITALIAN:
+        switch (sub)
+          {
+          case SUBLANG_ITALIAN: return "it_IT";
+          case SUBLANG_ITALIAN_SWISS: return "it_CH";
+          }
+        return "it";
+      case LANG_JAPANESE:
+        switch (sub)
+          {
+          case SUBLANG_JAPANESE_JAPAN: return "ja_JP";
+          }
+        return "ja";
+      case LANG_KANNADA:
+        switch (sub)
+          {
+          case SUBLANG_KANNADA_INDIA: return "kn_IN";
+          }
+        return "kn";
+      case LANG_KANURI:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "kr_NG";
+          }
+        return "kr";
+      case LANG_KASHMIRI:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ks_PK";
+          case SUBLANG_KASHMIRI_INDIA: return "ks_IN";
+          }
+        return "ks";
+      case LANG_KAZAK:
+        switch (sub)
+          {
+          case SUBLANG_KAZAK_KAZAKHSTAN: return "kk_KZ";
+          }
+        return "kk";
+      case LANG_KICHE:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          case SUBLANG_KICHE_GUATEMALA: return "qut_GT";
+          }
+        return "qut";
+      case LANG_KINYARWANDA:
+        switch (sub)
+          {
+          case SUBLANG_KINYARWANDA_RWANDA: return "rw_RW";
+          }
+        return "rw";
+      case LANG_KONKANI:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          case SUBLANG_KONKANI_INDIA: return "kok_IN";
+          }
+        return "kok";
+      case LANG_KOREAN:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ko_KR";
+          }
+        return "ko";
+      case LANG_KYRGYZ:
+        switch (sub)
+          {
+          case SUBLANG_KYRGYZ_KYRGYZSTAN: return "ky_KG";
+          }
+        return "ky";
+      case LANG_LAO:
+        switch (sub)
+          {
+          case SUBLANG_LAO_LAOS: return "lo_LA";
+          }
+        return "lo";
+      case LANG_LATIN:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "la_VA";
+          }
+        return "la";
+      case LANG_LATVIAN:
+        switch (sub)
+          {
+          case SUBLANG_LATVIAN_LATVIA: return "lv_LV";
+          }
+        return "lv";
+      case LANG_LITHUANIAN:
+        switch (sub)
+          {
+          case SUBLANG_LITHUANIAN_LITHUANIA: return "lt_LT";
+          }
+        return "lt";
+      case LANG_LUXEMBOURGISH:
+        switch (sub)
+          {
+          case SUBLANG_LUXEMBOURGISH_LUXEMBOURG: return "lb_LU";
+          }
+        return "lb";
+      case LANG_MACEDONIAN:
+        switch (sub)
+          {
+          case SUBLANG_MACEDONIAN_MACEDONIA: return "mk_MK";
+          }
+        return "mk";
+      case LANG_MALAY:
+        switch (sub)
+          {
+          case SUBLANG_MALAY_MALAYSIA: return "ms_MY";
+          case SUBLANG_MALAY_BRUNEI_DARUSSALAM: return "ms_BN";
+          }
+        return "ms";
+      case LANG_MALAYALAM:
+        switch (sub)
+          {
+          case SUBLANG_MALAYALAM_INDIA: return "ml_IN";
+          }
+        return "ml";
+      case LANG_MALTESE:
+        switch (sub)
+          {
+          case SUBLANG_MALTESE_MALTA: return "mt_MT";
+          }
+        return "mt";
+      case LANG_MANIPURI:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "mni_IN";
+          }
+        return "mni";
+      case LANG_MAORI:
+        switch (sub)
+          {
+          case SUBLANG_MAORI_NEW_ZEALAND: return "mi_NZ";
+          }
+        return "mi";
+      case LANG_MAPUDUNGUN:
+        switch (sub)
+          {
+          case SUBLANG_MAPUDUNGUN_CHILE: return "arn_CL";
+          }
+        return "arn";
+      case LANG_MARATHI:
+        switch (sub)
+          {
+          case SUBLANG_MARATHI_INDIA: return "mr_IN";
+          }
+        return "mr";
+      case LANG_MOHAWK:
+        switch (sub)
+          {
+          case SUBLANG_MOHAWK_CANADA: return "moh_CA";
+          }
+        return "moh";
+      case LANG_MONGOLIAN:
+        switch (sub)
+          {
+          case SUBLANG_MONGOLIAN_CYRILLIC_MONGOLIA: case 0x1e: return "mn_MN";
+          case SUBLANG_MONGOLIAN_PRC: case 0x1f: return "mn_CN";
+          }
+        return "mn"; /* Ambiguous: could be "mn_CN" or "mn_MN".  */
+      case LANG_NEPALI:
+        switch (sub)
+          {
+          case SUBLANG_NEPALI_NEPAL: return "ne_NP";
+          case SUBLANG_NEPALI_INDIA: return "ne_IN";
+          }
+        return "ne";
+      case LANG_NORWEGIAN:
+        switch (sub)
+          {
+          case 0x1f: return "nb";
+          case SUBLANG_NORWEGIAN_BOKMAL: return "nb_NO";
+          case 0x1e: return "nn";
+          case SUBLANG_NORWEGIAN_NYNORSK: return "nn_NO";
+          }
+        return "no";
+      case LANG_OCCITAN:
+        switch (sub)
+          {
+          case SUBLANG_OCCITAN_FRANCE: return "oc_FR";
+          }
+        return "oc";
+      case LANG_ORIYA:
+        switch (sub)
+          {
+          case SUBLANG_ORIYA_INDIA: return "or_IN";
+          }
+        return "or";
+      case LANG_OROMO:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "om_ET";
+          }
+        return "om";
+      case LANG_PAPIAMENTU:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "pap_AN";
+          }
+        return "pap";
+      case LANG_PASHTO:
+        switch (sub)
+          {
+          case SUBLANG_PASHTO_AFGHANISTAN: return "ps_AF";
+          }
+        return "ps"; /* Ambiguous: could be "ps_PK" or "ps_AF".  */
+      case LANG_POLISH:
+        switch (sub)
+          {
+          case SUBLANG_POLISH_POLAND: return "pl_PL";
+          }
+        return "pl";
+      case LANG_PORTUGUESE:
+        switch (sub)
+          {
+          /* Hmm. SUBLANG_PORTUGUESE_BRAZILIAN == SUBLANG_DEFAULT.
+             Same phenomenon as SUBLANG_ENGLISH_US == SUBLANG_DEFAULT. */
+          case SUBLANG_PORTUGUESE_BRAZILIAN: return "pt_BR";
+          case SUBLANG_PORTUGUESE: return "pt_PT";
+          }
+        return "pt";
+      case LANG_PUNJABI:
+        switch (sub)
+          {
+          case SUBLANG_PUNJABI_INDIA: return "pa_IN"; /* Gurmukhi script */
+          case SUBLANG_PUNJABI_PAKISTAN: return "pa_PK"; /* Arabic script */
+          }
+        return "pa";
+      case LANG_QUECHUA:
+        /* Note: Microsoft uses the non-ISO language code "quz".  */
+        switch (sub)
+          {
+          case SUBLANG_QUECHUA_BOLIVIA: return "qu_BO";
+          case SUBLANG_QUECHUA_ECUADOR: return "qu_EC";
+          case SUBLANG_QUECHUA_PERU: return "qu_PE";
+          }
+        return "qu";
+      case LANG_ROMANIAN:
+        switch (sub)
+          {
+          case SUBLANG_ROMANIAN_ROMANIA: return "ro_RO";
+          case SUBLANG_ROMANIAN_MOLDOVA: return "ro_MD";
+          }
+        return "ro";
+      case LANG_ROMANSH:
+        switch (sub)
+          {
+          case SUBLANG_ROMANSH_SWITZERLAND: return "rm_CH";
+          }
+        return "rm";
+      case LANG_RUSSIAN:
+        switch (sub)
+          {
+          case SUBLANG_RUSSIAN_RUSSIA: return "ru_RU";
+          case SUBLANG_RUSSIAN_MOLDAVIA: return "ru_MD";
+          }
+        return "ru"; /* Ambiguous: could be "ru_RU" or "ru_UA" or "ru_MD".  */
+      case LANG_SAMI:
+        switch (sub)
+          {
+          /* Northern Sami */
+          case 0x00: return "se";
+          case SUBLANG_SAMI_NORTHERN_NORWAY: return "se_NO";
+          case SUBLANG_SAMI_NORTHERN_SWEDEN: return "se_SE";
+          case SUBLANG_SAMI_NORTHERN_FINLAND: return "se_FI";
+          /* Lule Sami */
+          case 0x1f: return "smj";
+          case SUBLANG_SAMI_LULE_NORWAY: return "smj_NO";
+          case SUBLANG_SAMI_LULE_SWEDEN: return "smj_SE";
+          /* Southern Sami */
+          case 0x1e: return "sma";
+          case SUBLANG_SAMI_SOUTHERN_NORWAY: return "sma_NO";
+          case SUBLANG_SAMI_SOUTHERN_SWEDEN: return "sma_SE";
+          /* Skolt Sami */
+          case 0x1d: return "sms";
+          case SUBLANG_SAMI_SKOLT_FINLAND: return "sms_FI";
+          /* Inari Sami */
+          case 0x1c: return "smn";
+          case SUBLANG_SAMI_INARI_FINLAND: return "smn_FI";
+          }
+        return "se"; /* or "smi"? */
+      case LANG_SANSKRIT:
+        switch (sub)
+          {
+          case SUBLANG_SANSKRIT_INDIA: return "sa_IN";
+          }
+        return "sa";
+      case LANG_SCOTTISH_GAELIC:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "gd_GB";
+          }
+        return "gd";
+      case LANG_SINDHI:
+        switch (sub)
+          {
+          case SUBLANG_SINDHI_INDIA: return "sd_IN";
+          case SUBLANG_SINDHI_PAKISTAN: return "sd_PK";
+          /*case SUBLANG_SINDHI_AFGHANISTAN: return "sd_AF";*/
+          }
+        return "sd";
+      case LANG_SINHALESE:
+        switch (sub)
+          {
+          case SUBLANG_SINHALESE_SRI_LANKA: return "si_LK";
+          }
+        return "si";
+      case LANG_SLOVAK:
+        switch (sub)
+          {
+          case SUBLANG_SLOVAK_SLOVAKIA: return "sk_SK";
+          }
+        return "sk";
+      case LANG_SLOVENIAN:
+        switch (sub)
+          {
+          case SUBLANG_SLOVENIAN_SLOVENIA: return "sl_SI";
+          }
+        return "sl";
+      case LANG_SOMALI:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "so_SO";
+          }
+        return "so";
+      case LANG_SORBIAN:
+        /* FIXME: Adjust this when such locales appear on Unix.  */
+        switch (sub)
+          {
+          /* Upper Sorbian */
+          case 0x00: return "hsb";
+          case SUBLANG_UPPER_SORBIAN_GERMANY: return "hsb_DE";
+          /* Lower Sorbian */
+          case 0x1f: return "dsb";
+          case SUBLANG_LOWER_SORBIAN_GERMANY: return "dsb_DE";
+          }
+        return "wen";
+      case LANG_SOTHO:
+        /* <https://docs.microsoft.com/en-us/windows/desktop/Intl/language-identifier-constants-and-strings>
+           calls it "Sesotho sa Leboa"; according to
+           <https://www.ethnologue.com/show_language.asp?code=nso>
+           <https://www.ethnologue.com/show_language.asp?code=sot>
+           it's the same as Northern Sotho.  */
+        switch (sub)
+          {
+          case SUBLANG_SOTHO_SOUTH_AFRICA: return "nso_ZA";
+          }
+        return "nso";
+      case LANG_SPANISH:
+        switch (sub)
+          {
+          case SUBLANG_SPANISH: return "es_ES";
+          case SUBLANG_SPANISH_MEXICAN: return "es_MX";
+          case SUBLANG_SPANISH_MODERN:
+            return "es_ES@modern";      /* not seen on Unix */
+          case SUBLANG_SPANISH_GUATEMALA: return "es_GT";
+          case SUBLANG_SPANISH_COSTA_RICA: return "es_CR";
+          case SUBLANG_SPANISH_PANAMA: return "es_PA";
+          case SUBLANG_SPANISH_DOMINICAN_REPUBLIC: return "es_DO";
+          case SUBLANG_SPANISH_VENEZUELA: return "es_VE";
+          case SUBLANG_SPANISH_COLOMBIA: return "es_CO";
+          case SUBLANG_SPANISH_PERU: return "es_PE";
+          case SUBLANG_SPANISH_ARGENTINA: return "es_AR";
+          case SUBLANG_SPANISH_ECUADOR: return "es_EC";
+          case SUBLANG_SPANISH_CHILE: return "es_CL";
+          case SUBLANG_SPANISH_URUGUAY: return "es_UY";
+          case SUBLANG_SPANISH_PARAGUAY: return "es_PY";
+          case SUBLANG_SPANISH_BOLIVIA: return "es_BO";
+          case SUBLANG_SPANISH_EL_SALVADOR: return "es_SV";
+          case SUBLANG_SPANISH_HONDURAS: return "es_HN";
+          case SUBLANG_SPANISH_NICARAGUA: return "es_NI";
+          case SUBLANG_SPANISH_PUERTO_RICO: return "es_PR";
+          case SUBLANG_SPANISH_US: return "es_US";
+          }
+        return "es";
+      case LANG_SUTU:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "bnt_TZ"; /* or "st_LS" or "nso_ZA"? */
+          }
+        return "bnt";
+      case LANG_SWAHILI:
+        switch (sub)
+          {
+          case SUBLANG_SWAHILI_KENYA: return "sw_KE";
+          }
+        return "sw";
+      case LANG_SWEDISH:
+        switch (sub)
+          {
+          case SUBLANG_SWEDISH_SWEDEN: return "sv_SE";
+          case SUBLANG_SWEDISH_FINLAND: return "sv_FI";
+          }
+        return "sv";
+      case LANG_SYRIAC:
+        switch (sub)
+          {
+          case SUBLANG_SYRIAC_SYRIA: return "syr_SY"; /* An extinct language.  */
+          }
+        return "syr";
+      case LANG_TAGALOG:
+        switch (sub)
+          {
+          case SUBLANG_TAGALOG_PHILIPPINES: return "tl_PH"; /* or "fil_PH"? */
+          }
+        return "tl"; /* or "fil"? */
+      case LANG_TAJIK:
+        switch (sub)
+          {
+          case 0x1f: return "tg";
+          case SUBLANG_TAJIK_TAJIKISTAN: return "tg_TJ";
+          }
+        return "tg";
+      case LANG_TAMAZIGHT:
+        /* Note: Microsoft uses the non-ISO language code "tmz".  */
+        switch (sub)
+          {
+          /* FIXME: Adjust this when Tamazight locales appear on Unix.  */
+          case SUBLANG_TAMAZIGHT_ARABIC: return "ber_MA@arabic";
+          case 0x1f: return "ber@latin";
+          case SUBLANG_TAMAZIGHT_ALGERIA_LATIN: return "ber_DZ@latin";
+          }
+        return "ber";
+      case LANG_TAMIL:
+        switch (sub)
+          {
+          case SUBLANG_TAMIL_INDIA: return "ta_IN";
+          }
+        return "ta"; /* Ambiguous: could be "ta_IN" or "ta_LK" or "ta_SG".  */
+      case LANG_TATAR:
+        switch (sub)
+          {
+          case SUBLANG_TATAR_RUSSIA: return "tt_RU";
+          }
+        return "tt";
+      case LANG_TELUGU:
+        switch (sub)
+          {
+          case SUBLANG_TELUGU_INDIA: return "te_IN";
+          }
+        return "te";
+      case LANG_THAI:
+        switch (sub)
+          {
+          case SUBLANG_THAI_THAILAND: return "th_TH";
+          }
+        return "th";
+      case LANG_TIBETAN:
+        switch (sub)
+          {
+          case SUBLANG_TIBETAN_PRC:
+            /* Most Tibetans would not like "bo_CN".  But Tibet does not yet
+               have a country code of its own.  */
+            return "bo";
+          case SUBLANG_TIBETAN_BHUTAN: return "bo_BT";
+          }
+        return "bo";
+      case LANG_TIGRINYA:
+        switch (sub)
+          {
+          case SUBLANG_TIGRINYA_ETHIOPIA: return "ti_ET";
+          case SUBLANG_TIGRINYA_ERITREA: return "ti_ER";
+          }
+        return "ti";
+      case LANG_TSONGA:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ts_ZA";
+          }
+        return "ts";
+      case LANG_TSWANA:
+        /* Spoken in South Africa, Botswana.  */
+        switch (sub)
+          {
+          case SUBLANG_TSWANA_SOUTH_AFRICA: return "tn_ZA";
+          }
+        return "tn";
+      case LANG_TURKISH:
+        switch (sub)
+          {
+          case SUBLANG_TURKISH_TURKEY: return "tr_TR";
+          }
+        return "tr";
+      case LANG_TURKMEN:
+        switch (sub)
+          {
+          case SUBLANG_TURKMEN_TURKMENISTAN: return "tk_TM";
+          }
+        return "tk";
+      case LANG_UIGHUR:
+        switch (sub)
+          {
+          case SUBLANG_UIGHUR_PRC: return "ug_CN";
+          }
+        return "ug";
+      case LANG_UKRAINIAN:
+        switch (sub)
+          {
+          case SUBLANG_UKRAINIAN_UKRAINE: return "uk_UA";
+          }
+        return "uk";
+      case LANG_URDU:
+        switch (sub)
+          {
+          case SUBLANG_URDU_PAKISTAN: return "ur_PK";
+          case SUBLANG_URDU_INDIA: return "ur_IN";
+          }
+        return "ur";
+      case LANG_UZBEK:
+        switch (sub)
+          {
+          case 0x1f: return "uz";
+          case SUBLANG_UZBEK_LATIN: return "uz_UZ";
+          case 0x1e: return "uz@cyrillic";
+          case SUBLANG_UZBEK_CYRILLIC: return "uz_UZ@cyrillic";
+          }
+        return "uz";
+      case LANG_VENDA:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "ve_ZA";
+          }
+        return "ve";
+      case LANG_VIETNAMESE:
+        switch (sub)
+          {
+          case SUBLANG_VIETNAMESE_VIETNAM: return "vi_VN";
+          }
+        return "vi";
+      case LANG_WELSH:
+        switch (sub)
+          {
+          case SUBLANG_WELSH_UNITED_KINGDOM: return "cy_GB";
+          }
+        return "cy";
+      case LANG_WOLOF:
+        switch (sub)
+          {
+          case SUBLANG_WOLOF_SENEGAL: return "wo_SN";
+          }
+        return "wo";
+      case LANG_XHOSA:
+        switch (sub)
+          {
+          case SUBLANG_XHOSA_SOUTH_AFRICA: return "xh_ZA";
+          }
+        return "xh";
+      case LANG_YAKUT:
+        switch (sub)
+          {
+          case SUBLANG_YAKUT_RUSSIA: return "sah_RU";
+          }
+        return "sah";
+      case LANG_YI:
+        switch (sub)
+          {
+          case SUBLANG_YI_PRC: return "ii_CN";
+          }
+        return "ii";
+      case LANG_YIDDISH:
+        switch (sub)
+          {
+          case SUBLANG_DEFAULT: return "yi_IL";
+          }
+        return "yi";
+      case LANG_YORUBA:
+        switch (sub)
+          {
+          case SUBLANG_YORUBA_NIGERIA: return "yo_NG";
+          }
+        return "yo";
+      case LANG_ZULU:
+        switch (sub)
+          {
+          case SUBLANG_ZULU_SOUTH_AFRICA: return "zu_ZA";
+          }
+        return "zu";
+      default: return "C";
+      }
+  }
+}
+
+# if !defined IN_LIBINTL
+static
+# endif
+const char *
+gl_locale_name_from_win32_LCID (LCID lcid)
+{
+  LANGID langid;
+
+  /* Strip off the sorting rules, keep only the language part.  */
+  langid = LANGIDFROMLCID (lcid);
+
+  return gl_locale_name_from_win32_LANGID (langid);
+}
+
+# ifdef WINDOWS_NATIVE
+
+/* Two variables to interface between get_lcid and the EnumLocales
+   callback function below.  */
+static LCID found_lcid;
+static char lname[LC_MAX * (LOCALE_NAME_MAX_LENGTH + 1) + 1];
+
+/* Callback function for EnumLocales.  */
+static BOOL CALLBACK
+enum_locales_fn (LPSTR locale_num_str)
+{
+  char *endp;
+  char locval[2 * LOCALE_NAME_MAX_LENGTH + 1 + 1];
+  LCID try_lcid = strtoul (locale_num_str, &endp, 16);
+
+  if (GetLocaleInfo (try_lcid, LOCALE_SENGLANGUAGE,
+                    locval, LOCALE_NAME_MAX_LENGTH))
+    {
+      strcat (locval, "_");
+      if (GetLocaleInfo (try_lcid, LOCALE_SENGCOUNTRY,
+                        locval + strlen (locval), LOCALE_NAME_MAX_LENGTH))
+       {
+         size_t locval_len = strlen (locval);
+
+         if (strncmp (locval, lname, locval_len) == 0
+             && (lname[locval_len] == '.'
+                 || lname[locval_len] == '\0'))
+           {
+             found_lcid = try_lcid;
+             return FALSE;
+           }
+       }
+    }
+  return TRUE;
+}
+
+/* This lock protects the get_lcid against multiple simultaneous calls.  */
+gl_lock_define_initialized(static, get_lcid_lock)
+
+/* Return the Locale ID (LCID) number given the locale's name, a
+   string, in LOCALE_NAME.  This works by enumerating all the locales
+   supported by the system, until we find one whose name matches
+   LOCALE_NAME.  */
+static LCID
+get_lcid (const char *locale_name)
+{
+  /* A simple cache.  */
+  static LCID last_lcid;
+  static char last_locale[1000];
+
+  /* Lock while looking for an LCID, to protect access to static
+     variables: last_lcid, last_locale, found_lcid, and lname.  */
+  gl_lock_lock (get_lcid_lock);
+  if (last_lcid > 0 && strcmp (locale_name, last_locale) == 0)
+    {
+      gl_lock_unlock (get_lcid_lock);
+      return last_lcid;
+    }
+  strncpy (lname, locale_name, sizeof (lname) - 1);
+  lname[sizeof (lname) - 1] = '\0';
+  found_lcid = 0;
+  EnumSystemLocales (enum_locales_fn, LCID_SUPPORTED);
+  if (found_lcid > 0)
+    {
+      last_lcid = found_lcid;
+      strcpy (last_locale, locale_name);
+    }
+  gl_lock_unlock (get_lcid_lock);
+  return found_lcid;
+}
+
+# endif
+#endif
+
+
+#if HAVE_GOOD_USELOCALE /* glibc, Mac OS X, FreeBSD >= 9.1, Cygwin >= 2.6,
+                           Solaris 11 OpenIndiana, or Solaris >= 11.4  */
+
+/* Simple hash set of strings.  We don't want to drag in lots of hash table
+   code here.  */
+
+# define SIZE_BITS (sizeof (size_t) * CHAR_BIT)
+
+/* A hash function for NUL-terminated char* strings using
+   the method described by Bruno Haible.
+   See https://www.haible.de/bruno/hashfunc.html.  */
+static size_t _GL_ATTRIBUTE_PURE
+string_hash (const void *x)
+{
+  const char *s = (const char *) x;
+  size_t h = 0;
+
+  for (; *s; s++)
+    h = *s + ((h << 9) | (h >> (SIZE_BITS - 9)));
+
+  return h;
+}
+
+/* A hash table of fixed size.  Multiple threads can access it read-only
+   simultaneously, but only one thread can insert into it at the same time.  */
+
+/* A node in a hash bucket collision list.  */
+struct struniq_hash_node
+  {
+    struct struniq_hash_node * volatile next;
+    char contents[FLEXIBLE_ARRAY_MEMBER];
+  };
+
+# define STRUNIQ_HASH_TABLE_SIZE 257
+static struct struniq_hash_node * volatile struniq_hash_table[STRUNIQ_HASH_TABLE_SIZE]
+  /* = { NULL, ..., NULL } */;
+
+/* This lock protects the struniq_hash_table against multiple simultaneous
+   insertions.  */
+gl_lock_define_initialized(static, struniq_lock)
+
+/* Store a copy of the given string in a string pool with indefinite extent.
+   Return a pointer to this copy.  */
+static const char *
+struniq (const char *string)
+{
+  size_t hashcode = string_hash (string);
+  size_t slot = hashcode % STRUNIQ_HASH_TABLE_SIZE;
+  size_t size;
+  struct struniq_hash_node *new_node;
+  struct struniq_hash_node *p;
+  for (p = struniq_hash_table[slot]; p != NULL; p = p->next)
+    if (strcmp (p->contents, string) == 0)
+      return p->contents;
+  size = strlen (string) + 1;
+  new_node =
+    (struct struniq_hash_node *)
+    malloc (FLEXSIZEOF (struct struniq_hash_node, contents, size));
+  if (new_node == NULL)
+    /* Out of memory.  Return a statically allocated string.  */
+    return "C";
+  memcpy (new_node->contents, string, size);
+  {
+    bool mt = gl_multithreaded ();
+    /* Lock while inserting new_node.  */
+    if (mt) gl_lock_lock (struniq_lock);
+    /* Check whether another thread already added the string while we were
+       waiting on the lock.  */
+    for (p = struniq_hash_table[slot]; p != NULL; p = p->next)
+      if (strcmp (p->contents, string) == 0)
+        {
+          free (new_node);
+          new_node = p;
+          goto done;
+        }
+    /* Really insert new_node into the hash table.  Fill new_node entirely
+       first, because other threads may be iterating over the linked list.  */
+    new_node->next = struniq_hash_table[slot];
+    struniq_hash_table[slot] = new_node;
+   done:
+    /* Unlock after new_node is inserted.  */
+    if (mt) gl_lock_unlock (struniq_lock);
+  }
+  return new_node->contents;
+}
+
+#endif
+
+
+#if LOCALENAME_ENHANCE_LOCALE_FUNCS
+
+/* The 'locale_t' object does not contain the names of the locale categories.
+   We have to associate them with the object through a hash table.
+   The hash table is defined in localename-table.[hc].  */
+
+/* Returns the name of a given locale category in a given locale_t object,
+   allocated as a string with indefinite extent.  */
+static const char *
+get_locale_t_name (int category, locale_t locale)
+{
+  if (locale == LC_GLOBAL_LOCALE)
+    {
+      /* Query the global locale.  */
+      const char *name = setlocale_null (category);
+      if (name != NULL)
+        return struniq (name);
+      else
+        /* Should normally not happen.  */
+        return "";
+    }
+  else
+    {
+      /* Look up the names in the hash table.  */
+      size_t hashcode = locale_hash_function (locale);
+      size_t slot = hashcode % LOCALE_HASH_TABLE_SIZE;
+      /* If the locale was not found in the table, return "".  This can
+         happen if the application uses the original newlocale()/duplocale()
+         functions instead of the overridden ones.  */
+      const char *name = "";
+      struct locale_hash_node *p;
+      /* Lock while looking up the hash node.  */
+      gl_rwlock_rdlock (locale_lock);
+      for (p = locale_hash_table[slot]; p != NULL; p = p->next)
+        if (p->locale == locale)
+          {
+            name = p->names.category_name[category];
+            break;
+          }
+      gl_rwlock_unlock (locale_lock);
+      return name;
+    }
+}
+
+# if !(defined newlocale && defined duplocale && defined freelocale)
+#  error "newlocale, duplocale, freelocale not being replaced as expected!"
+# endif
+
+/* newlocale() override.  */
+locale_t
+newlocale (int category_mask, const char *name, locale_t base)
+#undef newlocale
+{
+  struct locale_categories_names names;
+  struct locale_hash_node *node;
+  locale_t result;
+
+  /* Make sure name has indefinite extent.  */
+  if (((LC_CTYPE_MASK | LC_NUMERIC_MASK | LC_TIME_MASK | LC_COLLATE_MASK
+        | LC_MONETARY_MASK | LC_MESSAGES_MASK)
+       & category_mask) != 0)
+    name = struniq (name);
+
+  /* Determine the category names of the result.  */
+  if (((LC_CTYPE_MASK | LC_NUMERIC_MASK | LC_TIME_MASK | LC_COLLATE_MASK
+        | LC_MONETARY_MASK | LC_MESSAGES_MASK)
+       & ~category_mask) == 0)
+    {
+      /* Use name, ignore base.  */
+      int category;
+
+      name = struniq (name);
+      for (category = 0; category < 6; category++)
+        names.category_name[category] = name;
+    }
+  else
+    {
+      /* Use base, possibly also name.  */
+      if (base == NULL)
+        {
+          int category;
+
+          for (category = 0; category < 6; category++)
+            {
+              int mask;
+
+              switch (category)
+                {
+                case LC_CTYPE:
+                  mask = LC_CTYPE_MASK;
+                  break;
+                case LC_NUMERIC:
+                  mask = LC_NUMERIC_MASK;
+                  break;
+                case LC_TIME:
+                  mask = LC_TIME_MASK;
+                  break;
+                case LC_COLLATE:
+                  mask = LC_COLLATE_MASK;
+                  break;
+                case LC_MONETARY:
+                  mask = LC_MONETARY_MASK;
+                  break;
+                case LC_MESSAGES:
+                  mask = LC_MESSAGES_MASK;
+                  break;
+                default:
+                  abort ();
+                }
+              names.category_name[category] =
+                ((mask & category_mask) != 0 ? name : "C");
+            }
+        }
+      else if (base == LC_GLOBAL_LOCALE)
+        {
+          int category;
+
+          for (category = 0; category < 6; category++)
+            {
+              int mask;
+
+              switch (category)
+                {
+                case LC_CTYPE:
+                  mask = LC_CTYPE_MASK;
+                  break;
+                case LC_NUMERIC:
+                  mask = LC_NUMERIC_MASK;
+                  break;
+                case LC_TIME:
+                  mask = LC_TIME_MASK;
+                  break;
+                case LC_COLLATE:
+                  mask = LC_COLLATE_MASK;
+                  break;
+                case LC_MONETARY:
+                  mask = LC_MONETARY_MASK;
+                  break;
+                case LC_MESSAGES:
+                  mask = LC_MESSAGES_MASK;
+                  break;
+                default:
+                  abort ();
+                }
+              names.category_name[category] =
+                ((mask & category_mask) != 0
+                 ? name
+                 : get_locale_t_name (category, LC_GLOBAL_LOCALE));
+            }
+        }
+      else
+        {
+          /* Look up the names of base in the hash table.  Like multiple calls
+             of get_locale_t_name, but locking only once.  */
+          struct locale_hash_node *p;
+          int category;
+
+          /* Lock while looking up the hash node.  */
+          gl_rwlock_rdlock (locale_lock);
+          for (p = locale_hash_table[locale_hash_function (base) % LOCALE_HASH_TABLE_SIZE];
+               p != NULL;
+               p = p->next)
+            if (p->locale == base)
+              break;
+
+          for (category = 0; category < 6; category++)
+            {
+              int mask;
+
+              switch (category)
+                {
+                case LC_CTYPE:
+                  mask = LC_CTYPE_MASK;
+                  break;
+                case LC_NUMERIC:
+                  mask = LC_NUMERIC_MASK;
+                  break;
+                case LC_TIME:
+                  mask = LC_TIME_MASK;
+                  break;
+                case LC_COLLATE:
+                  mask = LC_COLLATE_MASK;
+                  break;
+                case LC_MONETARY:
+                  mask = LC_MONETARY_MASK;
+                  break;
+                case LC_MESSAGES:
+                  mask = LC_MESSAGES_MASK;
+                  break;
+                default:
+                  abort ();
+                }
+              names.category_name[category] =
+                ((mask & category_mask) != 0
+                 ? name
+                 : (p != NULL ? p->names.category_name[category] : ""));
+            }
+
+          gl_rwlock_unlock (locale_lock);
+        }
+    }
+
+  node = (struct locale_hash_node *) malloc (sizeof (struct locale_hash_node));
+  if (node == NULL)
+    /* errno is set to ENOMEM.  */
+    return NULL;
+
+  result = newlocale (category_mask, name, base);
+  if (result == NULL)
+    {
+      free (node);
+      return NULL;
+    }
+
+  /* Fill the hash node.  */
+  node->locale = result;
+  node->names = names;
+
+  /* Insert it in the hash table.  */
+  {
+    size_t hashcode = locale_hash_function (result);
+    size_t slot = hashcode % LOCALE_HASH_TABLE_SIZE;
+    struct locale_hash_node *p;
+
+    /* Lock while inserting the new node.  */
+    gl_rwlock_wrlock (locale_lock);
+    for (p = locale_hash_table[slot]; p != NULL; p = p->next)
+      if (p->locale == result)
+        {
+          /* This can happen if the application uses the original freelocale()
+             function instead of the overridden one.  */
+          p->names = node->names;
+          break;
+        }
+    if (p == NULL)
+      {
+        node->next = locale_hash_table[slot];
+        locale_hash_table[slot] = node;
+      }
+
+    gl_rwlock_unlock (locale_lock);
+
+    if (p != NULL)
+      free (node);
+  }
+
+  return result;
+}
+
+/* duplocale() override.  */
+locale_t
+duplocale (locale_t locale)
+#undef duplocale
+{
+  struct locale_hash_node *node;
+  locale_t result;
+
+  if (locale == NULL)
+    /* Invalid argument.  */
+    abort ();
+
+  node = (struct locale_hash_node *) malloc (sizeof (struct locale_hash_node));
+  if (node == NULL)
+    /* errno is set to ENOMEM.  */
+    return NULL;
+
+  result = duplocale (locale);
+  if (result == NULL)
+    {
+      free (node);
+      return NULL;
+    }
+
+  /* Fill the hash node.  */
+  node->locale = result;
+  if (locale == LC_GLOBAL_LOCALE)
+    {
+      int category;
+
+      for (category = 0; category < 6; category++)
+        node->names.category_name[category] =
+          get_locale_t_name (category, LC_GLOBAL_LOCALE);
+
+      /* Lock before inserting the new node.  */
+      gl_rwlock_wrlock (locale_lock);
+    }
+  else
+    {
+      struct locale_hash_node *p;
+
+      /* Lock once, for the lookup and the insertion.  */
+      gl_rwlock_wrlock (locale_lock);
+
+      for (p = locale_hash_table[locale_hash_function (locale) % LOCALE_HASH_TABLE_SIZE];
+           p != NULL;
+           p = p->next)
+        if (p->locale == locale)
+          break;
+      if (p != NULL)
+        node->names = p->names;
+      else
+        {
+          /* This can happen if the application uses the original
+             newlocale()/duplocale() functions instead of the overridden
+             ones.  */
+          int category;
+
+          for (category = 0; category < 6; category++)
+            node->names.category_name[category] = "";
+        }
+    }
+
+  /* Insert it in the hash table.  */
+  {
+    size_t hashcode = locale_hash_function (result);
+    size_t slot = hashcode % LOCALE_HASH_TABLE_SIZE;
+    struct locale_hash_node *p;
+
+    for (p = locale_hash_table[slot]; p != NULL; p = p->next)
+      if (p->locale == result)
+        {
+          /* This can happen if the application uses the original freelocale()
+             function instead of the overridden one.  */
+          p->names = node->names;
+          break;
+        }
+    if (p == NULL)
+      {
+        node->next = locale_hash_table[slot];
+        locale_hash_table[slot] = node;
+      }
+
+    gl_rwlock_unlock (locale_lock);
+
+    if (p != NULL)
+      free (node);
+  }
+
+  return result;
+}
+
+/* freelocale() override.  */
+void
+freelocale (locale_t locale)
+#undef freelocale
+{
+  if (locale == NULL || locale == LC_GLOBAL_LOCALE)
+    /* Invalid argument.  */
+    abort ();
+
+  {
+    size_t hashcode = locale_hash_function (locale);
+    size_t slot = hashcode % LOCALE_HASH_TABLE_SIZE;
+    struct locale_hash_node *found;
+    struct locale_hash_node **p;
+
+    found = NULL;
+    /* Lock while removing the hash node.  */
+    gl_rwlock_wrlock (locale_lock);
+    for (p = &locale_hash_table[slot]; *p != NULL; p = &(*p)->next)
+      if ((*p)->locale == locale)
+        {
+          found = *p;
+          *p = (*p)->next;
+          break;
+        }
+    gl_rwlock_unlock (locale_lock);
+    free (found);
+  }
+
+  freelocale (locale);
+}
+
+#endif
+
+
+#if defined IN_LIBINTL || HAVE_GOOD_USELOCALE
+
+/* Like gl_locale_name_thread, except that the result is not in storage of
+   indefinite extent.  */
+# if !defined IN_LIBINTL
+static
+# endif
+const char *
+gl_locale_name_thread_unsafe (int category, const char *categoryname _GL_UNUSED)
+{
+# if HAVE_GOOD_USELOCALE
+  {
+    locale_t thread_locale = uselocale (NULL);
+    if (thread_locale != LC_GLOBAL_LOCALE)
+      {
+#  if __GLIBC__ >= 2 && !defined __UCLIBC__
+        /* Work around an incorrect definition of the _NL_LOCALE_NAME macro in
+           glibc < 2.12.
+           See <https://sourceware.org/bugzilla/show_bug.cgi?id=10968>.  */
+        const char *name =
+          nl_langinfo (_NL_ITEM ((category), _NL_ITEM_INDEX (-1)));
+        if (name[0] == '\0')
+          /* Fallback code for glibc < 2.4, which did not implement
+             nl_langinfo (_NL_LOCALE_NAME (category)).  */
+          name = thread_locale->__names[category];
+        return name;
+#  elif defined __linux__ && HAVE_LANGINFO_H && defined NL_LOCALE_NAME
+        /* musl libc */
+        return nl_langinfo_l (NL_LOCALE_NAME (category), thread_locale);
+#  elif (defined __FreeBSD__ || defined __DragonFly__) || (defined __APPLE__ && defined __MACH__)
+        /* FreeBSD, Mac OS X */
+        int mask;
+
+        switch (category)
+          {
+          case LC_CTYPE:
+            mask = LC_CTYPE_MASK;
+            break;
+          case LC_NUMERIC:
+            mask = LC_NUMERIC_MASK;
+            break;
+          case LC_TIME:
+            mask = LC_TIME_MASK;
+            break;
+          case LC_COLLATE:
+            mask = LC_COLLATE_MASK;
+            break;
+          case LC_MONETARY:
+            mask = LC_MONETARY_MASK;
+            break;
+          case LC_MESSAGES:
+            mask = LC_MESSAGES_MASK;
+            break;
+          default: /* We shouldn't get here.  */
+            return "";
+          }
+        return querylocale (mask, thread_locale);
+#  elif defined __sun
+#   if HAVE_GETLOCALENAME_L
+        /* Solaris >= 12.  */
+        return getlocalename_l (category, thread_locale);
+#   elif HAVE_SOLARIS114_LOCALES
+        /* Solaris >= 11.4.  */
+        void *lcp = (*thread_locale)->core.data->lcp;
+        if (lcp != NULL)
+          switch (category)
+            {
+            case LC_CTYPE:
+            case LC_NUMERIC:
+            case LC_TIME:
+            case LC_COLLATE:
+            case LC_MONETARY:
+            case LC_MESSAGES:
+              return ((const char * const *) lcp)[category];
+            default: /* We shouldn't get here.  */
+              return "";
+            }
+#   elif HAVE_NAMELESS_LOCALES
+        return get_locale_t_name (category, thread_locale);
+#   else
+        /* Solaris 11 OpenIndiana.
+           For the internal structure of locale objects, see
+           https://github.com/OpenIndiana/illumos-gate/blob/master/usr/src/lib/libc/port/locale/localeimpl.h  */
+        switch (category)
+          {
+          case LC_CTYPE:
+          case LC_NUMERIC:
+          case LC_TIME:
+          case LC_COLLATE:
+          case LC_MONETARY:
+          case LC_MESSAGES:
+            return ((const char * const *) thread_locale)[category];
+          default: /* We shouldn't get here.  */
+            return "";
+          }
+#   endif
+#  elif defined _AIX && HAVE_NAMELESS_LOCALES
+        return get_locale_t_name (category, thread_locale);
+#  elif defined __CYGWIN__
+        /* Cygwin < 2.6 lacks uselocale and thread-local locales altogether.
+           Cygwin <= 2.6.1 lacks NL_LOCALE_NAME, requiring peeking inside
+           an opaque struct.  */
+#   ifdef NL_LOCALE_NAME
+        return nl_langinfo_l (NL_LOCALE_NAME (category), thread_locale);
+#   else
+        /* FIXME: Remove when we can assume new-enough Cygwin.  */
+        struct __locale_t {
+          char categories[7][32];
+        };
+        return ((struct __locale_t *) thread_locale)->categories[category];
+#   endif
+#  elif defined __ANDROID__
+        return MB_CUR_MAX == 4 ? "C.UTF-8" : "C";
+#  endif
+      }
+  }
+# endif
+  return NULL;
+}
+
+#endif
+
+const char *
+gl_locale_name_thread (int category, const char *categoryname _GL_UNUSED)
+{
+#if HAVE_GOOD_USELOCALE
+  const char *name = gl_locale_name_thread_unsafe (category, categoryname);
+  if (name != NULL)
+    return struniq (name);
+#endif
+  /* On WINDOWS_NATIVE, don't use GetThreadLocale() here, because when
+     SetThreadLocale has not been called - which is a very frequent case -
+     the value of GetThreadLocale() ignores past calls to 'setlocale'.  */
+  return NULL;
+}
+
+/* XPG3 defines the result of 'setlocale (category, NULL)' as:
+   "Directs 'setlocale()' to query 'category' and return the current
+    setting of 'local'."
+   However it does not specify the exact format.  Neither do SUSV2 and
+   ISO C 99.  So we can use this feature only on selected systems (e.g.
+   those using GNU C Library).  */
+#if defined _LIBC || ((defined __GLIBC__ && __GLIBC__ >= 2) && !defined __UCLIBC__)
+# define HAVE_LOCALE_NULL
+#endif
+
+const char *
+gl_locale_name_posix (int category, const char *categoryname _GL_UNUSED)
+{
+#if defined WINDOWS_NATIVE
+  if (LC_MIN <= category && category <= LC_MAX)
+    {
+      const char *locname =
+        /* setlocale_null (category) is identical to setlocale (category, NULL)
+           on this platform.  */
+        setlocale (category, NULL);
+
+      /* Convert locale name to LCID.  We don't want to use
+         LocaleNameToLCID because (a) it is only available since Vista,
+         and (b) it doesn't accept locale names returned by 'setlocale'.  */
+      LCID lcid = get_lcid (locname);
+
+      if (lcid > 0)
+        return gl_locale_name_from_win32_LCID (lcid);
+    }
+#endif
+  {
+    const char *locname;
+
+    /* Use the POSIX methods of looking to 'LC_ALL', 'LC_xxx', and 'LANG'.
+       On some systems this can be done by the 'setlocale' function itself.  */
+#if defined HAVE_LC_MESSAGES && defined HAVE_LOCALE_NULL
+    locname = setlocale_null (category);
+#else
+    /* On other systems we ignore what setlocale reports and instead look at the
+       environment variables directly.  This is necessary
+         1. on systems which have a facility for customizing the default locale
+            (Mac OS X, native Windows, Cygwin) and where the system's setlocale()
+            function ignores this default locale (Mac OS X, Cygwin), in two cases:
+            a. when the user missed to use the setlocale() override from libintl
+               (for example by not including <libintl.h>),
+            b. when setlocale supports only the "C" locale, such as on Cygwin
+               1.5.x.  In this case even the override from libintl cannot help.
+         2. on all systems where setlocale supports only the "C" locale.  */
+    /* Strictly speaking, it is a POSIX violation to look at the environment
+       variables regardless whether setlocale has been called or not.  POSIX
+       says:
+           "For C-language programs, the POSIX locale shall be the
+            default locale when the setlocale() function is not called."
+       But we assume that all programs that use internationalized APIs call
+       setlocale (LC_ALL, "").  */
+    locname = gl_locale_name_environ (category, categoryname);
+#endif
+    /* Convert the locale name from the format returned by setlocale() or found
+       in the environment variables to the XPG syntax.  */
+#if defined WINDOWS_NATIVE
+    if (locname != NULL)
+      {
+        /* Convert locale name to LCID.  We don't want to use
+           LocaleNameToLCID because (a) it is only available since Vista,
+           and (b) it doesn't accept locale names returned by 'setlocale'.  */
+        LCID lcid = get_lcid (locname);
+
+        if (lcid > 0)
+          return gl_locale_name_from_win32_LCID (lcid);
+      }
+#endif
+    return locname;
+  }
+}
+
+const char *
+gl_locale_name_environ (int category _GL_UNUSED, const char *categoryname)
+{
+  const char *retval;
+
+  /* Setting of LC_ALL overrides all other.  */
+  retval = getenv ("LC_ALL");
+  if (retval != NULL && retval[0] != '\0')
+    return retval;
+  /* Next comes the name of the desired category.  */
+  retval = getenv (categoryname);
+  if (retval != NULL && retval[0] != '\0')
+    return retval;
+  /* Last possibility is the LANG environment variable.  */
+  retval = getenv ("LANG");
+  if (retval != NULL && retval[0] != '\0')
+    {
+#if HAVE_CFPREFERENCESCOPYAPPVALUE
+      /* Mac OS X 10.2 or newer.
+         Ignore invalid LANG value set by the Terminal application.  */
+      if (strcmp (retval, "UTF-8") != 0)
+#endif
+#if defined __CYGWIN__
+      /* Cygwin.
+         Ignore dummy LANG value set by ~/.profile.  */
+      if (strcmp (retval, "C.UTF-8") != 0)
+#endif
+        return retval;
+    }
+
+  return NULL;
+}
+
+const char *
+gl_locale_name_default (void)
+{
+  /* POSIX:2001 says:
+     "All implementations shall define a locale as the default locale, to be
+      invoked when no environment variables are set, or set to the empty
+      string.  This default locale can be the POSIX locale or any other
+      implementation-defined locale.  Some implementations may provide
+      facilities for local installation administrators to set the default
+      locale, customizing it for each location.  POSIX:2001 does not require
+      such a facility.
+
+     The systems with such a facility are Mac OS X and Windows: They provide a
+     GUI that allows the user to choose a locale.
+       - On Mac OS X, by default, none of LC_* or LANG are set.  Starting with
+         Mac OS X 10.4 or 10.5, LANG is set for processes launched by the
+         'Terminal' application (but sometimes to an incorrect value "UTF-8").
+         When no environment variable is set, setlocale (LC_ALL, "") uses the
+         "C" locale.
+       - On native Windows, by default, none of LC_* or LANG are set.
+         When no environment variable is set, setlocale (LC_ALL, "") uses the
+         locale chosen by the user.
+       - On Cygwin 1.5.x, by default, none of LC_* or LANG are set.
+         When no environment variable is set, setlocale (LC_ALL, "") uses the
+         "C" locale.
+       - On Cygwin 1.7, by default, LANG is set to "C.UTF-8" when the default
+         ~/.profile is executed.
+         When no environment variable is set, setlocale (LC_ALL, "") uses the
+         "C.UTF-8" locale, which operates in the same way as the "C" locale.
+  */
+
+#if !(HAVE_CFPREFERENCESCOPYAPPVALUE || defined WINDOWS_NATIVE || defined __CYGWIN__)
+
+  /* The system does not have a way of setting the locale, other than the
+     POSIX specified environment variables.  We use C as default locale.  */
+  return "C";
+
+#else
+
+  /* Return an XPG style locale name language[_territory][@modifier].
+     Don't even bother determining the codeset; it's not useful in this
+     context, because message catalogs are not specific to a single
+     codeset.  */
+
+# if HAVE_CFPREFERENCESCOPYAPPVALUE
+  /* Mac OS X 10.4 or newer */
+  /* Don't use the API introduced in Mac OS X 10.5, CFLocaleCopyCurrent,
+     because in macOS 10.13.4 it has the following behaviour:
+     When two or more languages are specified in the
+     "System Preferences > Language & Region > Preferred Languages" panel,
+     it returns en_CC where CC is the territory (even when English is not among
+     the preferred languages!).  What we want instead is what
+     CFLocaleCopyCurrent returned in earlier macOS releases and what
+     CFPreferencesCopyAppValue still returns, namely ll_CC where ll is the
+     first among the preferred languages and CC is the territory.  */
+  {
+    /* Cache the locale name, since CoreFoundation calls are expensive.  */
+    static const char *cached_localename;
+
+    if (cached_localename == NULL)
+      {
+        char namebuf[256];
+        CFTypeRef value =
+          CFPreferencesCopyAppValue (CFSTR ("AppleLocale"),
+                                     kCFPreferencesCurrentApplication);
+        if (value != NULL && CFGetTypeID (value) == CFStringGetTypeID ())
+          {
+            CFStringRef name = (CFStringRef)value;
+
+            if (CFStringGetCString (name, namebuf, sizeof (namebuf),
+                                    kCFStringEncodingASCII))
+              {
+                gl_locale_name_canonicalize (namebuf);
+                cached_localename = strdup (namebuf);
+              }
+          }
+        if (cached_localename == NULL)
+          cached_localename = "C";
+      }
+    return cached_localename;
+  }
+
+# endif
+
+# if defined WINDOWS_NATIVE || defined __CYGWIN__ /* Native Windows or Cygwin */
+  {
+    LCID lcid;
+
+    /* Use native Windows API locale ID.  */
+    lcid = GetThreadLocale ();
+
+    return gl_locale_name_from_win32_LCID (lcid);
+  }
+# endif
+#endif
+}
+
+/* Determine the current locale's name, and canonicalize it into XPG syntax
+     language[_territory][.codeset][@modifier]
+   The codeset part in the result is not reliable; the locale_charset()
+   should be used for codeset information instead.
+   The result must not be freed; it is statically allocated.  */
+
+const char *
+gl_locale_name (int category, const char *categoryname)
+{
+  const char *retval;
+
+  retval = gl_locale_name_thread (category, categoryname);
+  if (retval != NULL)
+    return retval;
+
+  retval = gl_locale_name_posix (category, categoryname);
+  if (retval != NULL)
+    return retval;
+
+  return gl_locale_name_default ();
+}
diff --git a/src/gl/tests/localename.h b/src/gl/tests/localename.h
new file mode 100644
index 0000000..dab1d0b
--- /dev/null
+++ b/src/gl/tests/localename.h
@@ -0,0 +1,98 @@
+/* Determine name of the currently selected locale.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_LOCALENAME_H
+#define _GL_LOCALENAME_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Determine the current locale's name.
+   It considers both the POSIX notion of locale name (see functions
+   gl_locale_name_thread and gl_locale_name_posix) and the system notion
+   of locale name (see function gl_locale_name_default).
+   CATEGORY is a locale category abbreviation, as defined in <locale.h>,
+   but not LC_ALL. E.g. LC_MESSAGES.
+   CATEGORYNAME is the name of CATEGORY as a string, e.g. "LC_MESSAGES".
+   Return the locale category's name, canonicalized into XPG syntax
+     language[_territory][.codeset][@modifier]
+   The codeset part in the result is not reliable; the locale_charset()
+   should be used for codeset information instead.
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name (int category, const char *categoryname);
+
+/* Determine the current per-thread locale's name, as specified by uselocale()
+   calls.
+   CATEGORY is a locale category abbreviation, as defined in <locale.h>,
+   but not LC_ALL. E.g. LC_MESSAGES.
+   CATEGORYNAME is the name of CATEGORY as a string, e.g. "LC_MESSAGES".
+   Return the locale category's name, canonicalized into XPG syntax
+     language[_territory][.codeset][@modifier]
+   or NULL if no locale has been specified for the current thread.
+   The codeset part in the result is not reliable; the locale_charset()
+   should be used for codeset information instead.
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name_thread (int category, const char *categoryname);
+
+/* Determine the thread-independent current locale's name, as specified by
+   setlocale() calls or by environment variables.
+   CATEGORY is a locale category abbreviation, as defined in <locale.h>,
+   but not LC_ALL. E.g. LC_MESSAGES.
+   CATEGORYNAME is the name of CATEGORY as a string, e.g. "LC_MESSAGES".
+   Return the locale category's name, canonicalized into XPG syntax
+     language[_territory][.codeset][@modifier]
+   or NULL if no locale has been specified to setlocale() or by environment
+   variables.
+   The codeset part in the result is not reliable; the locale_charset()
+   should be used for codeset information instead.
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name_posix (int category, const char *categoryname);
+
+/* Determine the default locale's name, as specified by environment
+   variables.
+   Return the locale category's name, or NULL if no locale has been specified
+   by environment variables.
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name_environ (int category, const char *categoryname);
+
+/* Determine the default locale's name.  This is the current locale's name,
+   if not specified by uselocale() calls, by setlocale() calls, or by
+   environment variables.  This locale name is usually determined by systems
+   settings that the user can manipulate through a GUI.
+
+   Quoting POSIX:2001:
+     "All implementations shall define a locale as the default locale,
+      to be invoked when no environment variables are set, or set to the
+      empty string.  This default locale can be the C locale or any other
+      implementation-defined locale.  Some implementations may provide
+      facilities for local installation administrators to set the default
+      locale, customizing it for each location.  IEEE Std 1003.1-2001 does
+      not require such a facility."
+
+   The result must not be freed; it is statically allocated.  */
+extern const char * gl_locale_name_default (void)
+#if !(HAVE_CFPREFERENCESCOPYAPPVALUE || defined _WIN32 || defined __CYGWIN__)
+  _GL_ATTRIBUTE_CONST
+#endif
+  ;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _GL_LOCALENAME_H */
diff --git a/src/gl/tests/lstat.c b/src/gl/tests/lstat.c
new file mode 100644
index 0000000..a584c6a
--- /dev/null
+++ b/src/gl/tests/lstat.c
@@ -0,0 +1,104 @@
+/* Work around a bug of lstat on some systems
+
+   Copyright (C) 1997-2006, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering */
+
+/* If the user's config.h happens to include <sys/stat.h>, let it include only
+   the system's <sys/stat.h> here, so that orig_lstat doesn't recurse to
+   rpl_lstat.  */
+#define __need_system_sys_stat_h
+#include <config.h>
+
+#if !HAVE_LSTAT
+/* On systems that lack symlinks, our replacement <sys/stat.h> already
+   defined lstat as stat, so there is nothing further to do other than
+   avoid an empty file.  */
+typedef int dummy;
+#else /* HAVE_LSTAT */
+
+/* Get the original definition of lstat.  It might be defined as a macro.  */
+# include <sys/types.h>
+# include <sys/stat.h>
+# undef __need_system_sys_stat_h
+
+static int
+orig_lstat (const char *filename, struct stat *buf)
+{
+  return lstat (filename, buf);
+}
+
+/* Specification.  */
+# ifdef __osf__
+/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
+   eliminates this include because of the preliminary #include <sys/stat.h>
+   above.  */
+#  include "sys/stat.h"
+# else
+#  include <sys/stat.h>
+# endif
+
+# include "stat-time.h"
+
+# include <string.h>
+# include <errno.h>
+
+/* lstat works differently on Linux and Solaris systems.  POSIX (see
+   "pathname resolution" in the glossary) requires that programs like
+   'ls' take into consideration the fact that FILE has a trailing slash
+   when FILE is a symbolic link.  On Linux and Solaris 10 systems, the
+   lstat function already has the desired semantics (in treating
+   'lstat ("symlink/", sbuf)' just like 'lstat ("symlink/.", sbuf)',
+   but on Solaris 9 and earlier it does not.
+
+   If FILE has a trailing slash and specifies a symbolic link,
+   then use stat() to get more info on the referent of FILE.
+   If the referent is a non-directory, then set errno to ENOTDIR
+   and return -1.  Otherwise, return stat's result.  */
+
+int
+rpl_lstat (const char *file, struct stat *sbuf)
+{
+  int result = orig_lstat (file, sbuf);
+
+  /* This replacement file can blindly check against '/' rather than
+     using the ISSLASH macro, because all platforms with '\\' either
+     lack symlinks (mingw) or have working lstat (cygwin) and thus do
+     not compile this file.  0 len should have already been filtered
+     out above, with a failure return of ENOENT.  */
+  if (result == 0)
+    {
+      if (S_ISDIR (sbuf->st_mode) || file[strlen (file) - 1] != '/')
+        result = stat_time_normalize (result, sbuf);
+      else
+        {
+          /* At this point, a trailing slash is permitted only on
+             symlink-to-dir; but it should have found information on the
+             directory, not the symlink.  Call 'stat' to get info about the
+             link's referent.  Our replacement stat guarantees valid results,
+             even if the symlink is not pointing to a directory.  */
+          if (!S_ISLNK (sbuf->st_mode))
+            {
+              errno = ENOTDIR;
+              return -1;
+            }
+          result = stat (file, sbuf);
+        }
+    }
+  return result;
+}
+
+#endif /* HAVE_LSTAT */
diff --git a/src/gl/tests/macros.h b/src/gl/tests/macros.h
new file mode 100644
index 0000000..fccfc50
--- /dev/null
+++ b/src/gl/tests/macros.h
@@ -0,0 +1,109 @@
+/* Common macros used by gnulib tests.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+
+/* This file contains macros that are used by many gnulib tests.
+   Put here only frequently used macros, say, used by 10 tests or more.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifndef FALLTHROUGH
+# if (__GNUC__ >= 7) || (__clang_major__ >= 10)
+#  define FALLTHROUGH __attribute__ ((__fallthrough__))
+# else
+#  define FALLTHROUGH ((void) 0)
+# endif
+#endif
+
+/* Define ASSERT_STREAM before including this file if ASSERT must
+   target a stream other than stderr.  */
+#ifndef ASSERT_STREAM
+# define ASSERT_STREAM stderr
+#endif
+
+/* ASSERT (condition);
+   verifies that the specified condition is fulfilled.  If not, a message
+   is printed to ASSERT_STREAM if defined (defaulting to stderr if
+   undefined) and the program is terminated with an error code.
+
+   This macro has the following properties:
+     - The programmer specifies the expected condition, not the failure
+       condition.  This simplifies thinking.
+     - The condition is tested always, regardless of compilation flags.
+       (Unlike the macro from <assert.h>.)
+     - On Unix platforms, the tester can debug the test program with a
+       debugger (provided core dumps are enabled: "ulimit -c unlimited").
+     - For the sake of platforms where no debugger is available (such as
+       some mingw systems), an error message is printed on the error
+       stream that includes the source location of the ASSERT invocation.
+ */
+#define ASSERT(expr) \
+  do                                                                         \
+    {                                                                        \
+      if (!(expr))                                                           \
+        {                                                                    \
+          fprintf (ASSERT_STREAM, "%s:%d: assertion '%s' failed\n",          \
+                   __FILE__, __LINE__, #expr);                               \
+          fflush (ASSERT_STREAM);                                            \
+          abort ();                                                          \
+        }                                                                    \
+    }                                                                        \
+  while (0)
+
+/* Like ASSERT, except that it uses no stdio.
+   Requires #include <string.h> and #include <unistd.h>.  */
+#define ASSERT_NO_STDIO(expr) \
+  do                                                        \
+    {                                                       \
+      if (!(expr))                                          \
+        {                                                   \
+          WRITE_TO_STDERR (__FILE__);                       \
+          WRITE_TO_STDERR (":");                            \
+          WRITE_MACROEXPANDED_INTEGER_TO_STDERR (__LINE__); \
+          WRITE_TO_STDERR (": assertion '");                \
+          WRITE_TO_STDERR (#expr);                          \
+          WRITE_TO_STDERR ("' failed\n");                   \
+          abort ();                                         \
+        }                                                   \
+    }                                                       \
+  while (0)
+#define WRITE_MACROEXPANDED_INTEGER_TO_STDERR(integer) \
+  WRITE_INTEGER_TO_STDERR(integer)
+#define WRITE_INTEGER_TO_STDERR(integer) \
+  WRITE_TO_STDERR (#integer)
+#define WRITE_TO_STDERR(string_literal) \
+  {                                     \
+    const char *s = string_literal;     \
+    int ret = write (2, s, strlen (s)); \
+    (void) ret;                         \
+  }
+
+/* SIZEOF (array)
+   returns the number of elements of an array.  It works for arrays that are
+   declared outside functions and for local variables of array type.  It does
+   *not* work for function parameters of array type, because they are actually
+   parameters of pointer type.  */
+#define SIZEOF(array) (sizeof (array) / sizeof (array[0]))
+
+/* STREQ (str1, str2)
+   Return true if two strings compare equal.  */
+#define STREQ(a, b) (strcmp (a, b) == 0)
+
+/* Some numbers in the interval [0,1).  */
+extern const float randomf[1000];
+extern const double randomd[1000];
+extern const long double randoml[1000];
diff --git a/src/gl/tests/nanosleep.c b/src/gl/tests/nanosleep.c
new file mode 100644
index 0000000..b8146d8
--- /dev/null
+++ b/src/gl/tests/nanosleep.c
@@ -0,0 +1,276 @@
+/* Provide a replacement for the POSIX nanosleep function.
+
+   Copyright (C) 1999-2000, 2002, 2004-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering
+   and Bruno Haible for the native Windows part */
+
+#include <config.h>
+
+#include <time.h>
+
+#include "intprops.h"
+#include "sig-handler.h"
+#include "verify.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/select.h>
+#include <signal.h>
+
+#include <sys/time.h>
+#include <errno.h>
+
+#include <unistd.h>
+
+
+enum { BILLION = 1000 * 1000 * 1000 };
+
+#if HAVE_BUG_BIG_NANOSLEEP
+
+int
+nanosleep (const struct timespec *requested_delay,
+           struct timespec *remaining_delay)
+# undef nanosleep
+{
+  /* nanosleep mishandles large sleeps due to internal overflow problems.
+     The worst known case of this is Linux 2.6.9 with glibc 2.3.4, which
+     can't sleep more than 24.85 days (2^31 milliseconds).  Similarly,
+     cygwin 1.5.x, which can't sleep more than 49.7 days (2^32 milliseconds).
+     Solve this by breaking the sleep up into smaller chunks.  */
+
+  if (requested_delay->tv_nsec < 0 || BILLION <= requested_delay->tv_nsec)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  {
+    /* Verify that time_t is large enough.  */
+    verify (TYPE_MAXIMUM (time_t) / 24 / 24 / 60 / 60);
+    const time_t limit = 24 * 24 * 60 * 60;
+    time_t seconds = requested_delay->tv_sec;
+    struct timespec intermediate;
+    intermediate.tv_nsec = requested_delay->tv_nsec;
+
+    while (limit < seconds)
+      {
+        int result;
+        intermediate.tv_sec = limit;
+        result = nanosleep (&intermediate, remaining_delay);
+        seconds -= limit;
+        if (result)
+          {
+            if (remaining_delay)
+              remaining_delay->tv_sec += seconds;
+            return result;
+          }
+        intermediate.tv_nsec = 0;
+      }
+    intermediate.tv_sec = seconds;
+    return nanosleep (&intermediate, remaining_delay);
+  }
+}
+
+#elif defined _WIN32 && ! defined __CYGWIN__
+/* Native Windows platforms.  */
+
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+
+/* The Windows API function Sleep() has a resolution of about 15 ms and takes
+   at least 5 ms to execute.  We use this function for longer time periods.
+   Additionally, we use busy-looping over short time periods, to get a
+   resolution of about 0.01 ms.  In order to measure such short timespans,
+   we use the QueryPerformanceCounter() function.  */
+
+int
+nanosleep (const struct timespec *requested_delay,
+           struct timespec *remaining_delay)
+{
+  static bool initialized;
+  /* Number of performance counter increments per nanosecond,
+     or zero if it could not be determined.  */
+  static double ticks_per_nanosecond;
+
+  if (requested_delay->tv_nsec < 0 || BILLION <= requested_delay->tv_nsec)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  /* For requested delays of one second or more, 15ms resolution is
+     sufficient.  */
+  if (requested_delay->tv_sec == 0)
+    {
+      if (!initialized)
+        {
+          /* Initialize ticks_per_nanosecond.  */
+          LARGE_INTEGER ticks_per_second;
+
+          if (QueryPerformanceFrequency (&ticks_per_second))
+            ticks_per_nanosecond =
+              (double) ticks_per_second.QuadPart / 1000000000.0;
+
+          initialized = true;
+        }
+      if (ticks_per_nanosecond)
+        {
+          /* QueryPerformanceFrequency worked.  We can use
+             QueryPerformanceCounter.  Use a combination of Sleep and
+             busy-looping.  */
+          /* Number of milliseconds to pass to the Sleep function.
+             Since Sleep can take up to 8 ms less or 8 ms more than requested
+             (or maybe more if the system is loaded), we subtract 10 ms.  */
+          int sleep_millis = (int) requested_delay->tv_nsec / 1000000 - 10;
+          /* Determine how many ticks to delay.  */
+          LONGLONG wait_ticks = requested_delay->tv_nsec * ticks_per_nanosecond;
+          /* Start.  */
+          LARGE_INTEGER counter_before;
+          if (QueryPerformanceCounter (&counter_before))
+            {
+              /* Wait until the performance counter has reached this value.
+                 We don't need to worry about overflow, because the performance
+                 counter is reset at reboot, and with a frequency of 3.6E6
+                 ticks per second 63 bits suffice for over 80000 years.  */
+              LONGLONG wait_until = counter_before.QuadPart + wait_ticks;
+              /* Use Sleep for the longest part.  */
+              if (sleep_millis > 0)
+                Sleep (sleep_millis);
+              /* Busy-loop for the rest.  */
+              for (;;)
+                {
+                  LARGE_INTEGER counter_after;
+                  if (!QueryPerformanceCounter (&counter_after))
+                    /* QueryPerformanceCounter failed, but succeeded earlier.
+                       Should not happen.  */
+                    break;
+                  if (counter_after.QuadPart >= wait_until)
+                    /* The requested time has elapsed.  */
+                    break;
+                }
+              goto done;
+            }
+        }
+    }
+  /* Implementation for long delays and as fallback.  */
+  Sleep (requested_delay->tv_sec * 1000 + requested_delay->tv_nsec / 1000000);
+
+ done:
+  /* Sleep is not interruptible.  So there is no remaining delay.  */
+  if (remaining_delay != NULL)
+    {
+      remaining_delay->tv_sec = 0;
+      remaining_delay->tv_nsec = 0;
+    }
+  return 0;
+}
+
+#else
+/* Unix platforms lacking nanosleep. */
+
+/* Some systems (MSDOS) don't have SIGCONT.
+   Using SIGTERM here turns the signal-handling code below
+   into a no-op on such systems. */
+# ifndef SIGCONT
+#  define SIGCONT SIGTERM
+# endif
+
+static sig_atomic_t volatile suspended;
+
+/* Handle SIGCONT. */
+
+static _GL_ASYNC_SAFE void
+sighandler (int sig)
+{
+  suspended = 1;
+}
+
+/* Suspend execution for at least *TS_DELAY seconds.  */
+
+static int
+my_usleep (const struct timespec *ts_delay)
+{
+  struct timeval tv_delay;
+  tv_delay.tv_sec = ts_delay->tv_sec;
+  tv_delay.tv_usec = (ts_delay->tv_nsec + 999) / 1000;
+  if (tv_delay.tv_usec == 1000000)
+    {
+      if (tv_delay.tv_sec == TYPE_MAXIMUM (time_t))
+        tv_delay.tv_usec = 1000000 - 1; /* close enough */
+      else
+        {
+          tv_delay.tv_sec++;
+          tv_delay.tv_usec = 0;
+        }
+    }
+  return select (0, NULL, NULL, NULL, &tv_delay);
+}
+
+/* Suspend execution for at least *REQUESTED_DELAY seconds.  The
+   *REMAINING_DELAY part isn't implemented yet.  */
+
+int
+nanosleep (const struct timespec *requested_delay,
+           struct timespec *remaining_delay)
+{
+  static bool initialized;
+
+  if (requested_delay->tv_nsec < 0 || BILLION <= requested_delay->tv_nsec)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  /* set up sig handler */
+  if (! initialized)
+    {
+      struct sigaction oldact;
+
+      sigaction (SIGCONT, NULL, &oldact);
+      if (get_handler (&oldact) != SIG_IGN)
+        {
+          struct sigaction newact;
+
+          newact.sa_handler = sighandler;
+          sigemptyset (&newact.sa_mask);
+          newact.sa_flags = 0;
+          sigaction (SIGCONT, &newact, NULL);
+        }
+      initialized = true;
+    }
+
+  suspended = 0;
+
+  if (my_usleep (requested_delay) == -1)
+    {
+      if (suspended)
+        {
+          /* Calculate time remaining.  */
+          /* FIXME: the code in sleep doesn't use this, so there's no
+             rush to implement it.  */
+
+          errno = EINTR;
+        }
+      return -1;
+    }
+
+  /* FIXME: Restore sig handler?  */
+
+  return 0;
+}
+#endif
diff --git a/src/gl/tests/nap.h b/src/gl/tests/nap.h
new file mode 100644
index 0000000..3d0a51d
--- /dev/null
+++ b/src/gl/tests/nap.h
@@ -0,0 +1,162 @@
+/* Assist in file system timestamp tests.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#ifndef GLTEST_NAP_H
+# define GLTEST_NAP_H
+
+# include <limits.h>
+# include <stdbool.h>
+
+# include <intprops.h>
+
+/* Avoid a conflict with a function called nap() on UnixWare.  */
+# if defined _SCO_DS || (defined __SCO_VERSION__ || defined __sysv5__)  /* OpenServer, UnixWare */
+#  include <unistd.h>
+#  undef nap
+#  define nap gl_nap
+# endif
+
+/* Name of the witness file.  */
+#define TEMPFILE BASE "nap.tmp"
+
+/* File descriptor used for the witness file.  */
+static int nap_fd = -1;
+
+/* Return A - B, in ns.
+   Return 0 if the true result would be negative.
+   Return INT_MAX if the true result would be greater than INT_MAX.  */
+static int
+diff_timespec (struct timespec a, struct timespec b)
+{
+  time_t as = a.tv_sec;
+  time_t bs = b.tv_sec;
+  int ans = a.tv_nsec;
+  int bns = b.tv_nsec;
+  int sdiff;
+
+  ASSERT (0 <= ans && ans < 2000000000);
+  ASSERT (0 <= bns && bns < 2000000000);
+
+  if (! (bs < as || (bs == as && bns < ans)))
+    return 0;
+
+  if (INT_SUBTRACT_WRAPV (as, bs, &sdiff)
+      || INT_MULTIPLY_WRAPV (sdiff, 1000000000, &sdiff)
+      || INT_ADD_WRAPV (sdiff, ans - bns, &sdiff))
+    return INT_MAX;
+
+  return sdiff;
+}
+
+/* If DO_WRITE, bump the modification time of the file designated by NAP_FD.
+   Then fetch the new STAT information of NAP_FD.  */
+static void
+nap_get_stat (struct stat *st, int do_write)
+{
+  if (do_write)
+    {
+      ASSERT (write (nap_fd, "\n", 1) == 1);
+#if defined _WIN32 || defined __CYGWIN__
+      /* On Windows, the modification times are not changed until NAP_FD
+         is closed. See
+         <https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-writefile> */
+      close (nap_fd);
+      nap_fd = open (TEMPFILE, O_RDWR, 0600);
+      ASSERT (nap_fd != -1);
+      lseek (nap_fd, 0, SEEK_END);
+#endif
+    }
+  ASSERT (fstat (nap_fd, st) == 0);
+}
+
+/* Given a file whose descriptor is FD, see whether delaying by DELAY
+   nanoseconds causes a change in a file's mtime.
+   OLD_ST is the file's status, recently gotten.  */
+static bool
+nap_works (int delay, struct stat old_st)
+{
+  struct stat st;
+  struct timespec delay_spec;
+  delay_spec.tv_sec = delay / 1000000000;
+  delay_spec.tv_nsec = delay % 1000000000;
+  ASSERT (nanosleep (&delay_spec, 0) == 0);
+  nap_get_stat (&st, 1);
+
+  if (diff_timespec (get_stat_mtime (&st), get_stat_mtime (&old_st)))
+    return true;
+
+  return false;
+}
+
+static void
+clear_temp_file (void)
+{
+  if (0 <= nap_fd)
+    {
+      ASSERT (close (nap_fd) != -1);
+      ASSERT (unlink (TEMPFILE) != -1);
+    }
+}
+
+/* Sleep long enough to notice a timestamp difference on the file
+   system in the current directory.  Use an adaptive approach, trying
+   to find the smallest delay which works on the current file system
+   to make the timestamp difference appear.  Assert a maximum delay of
+   ~2 seconds, more precisely sum(2^n) from 0 to 30 = 2^31 - 1 = 2.1s.
+   Assumes that BASE is defined, and requires that the test module
+   depends on nanosleep.  */
+static void
+nap (void)
+{
+  struct stat old_st;
+  static int delay = 1;
+
+  if (-1 == nap_fd)
+    {
+      atexit (clear_temp_file);
+      ASSERT ((nap_fd = creat (TEMPFILE, 0600)) != -1);
+      nap_get_stat (&old_st, 0);
+    }
+  else
+    {
+      ASSERT (0 <= nap_fd);
+      nap_get_stat (&old_st, 1);
+    }
+
+  if (1 < delay)
+    delay = delay / 2;  /* Try half of the previous delay.  */
+  ASSERT (0 < delay);
+
+  for (;;)
+    {
+      if (nap_works (delay, old_st))
+        return;
+      if (delay <= (2147483647 - 1) / 2)
+        {
+          delay = delay * 2 + 1;
+          continue;
+        }
+      else
+        break;
+    }
+
+  /* Bummer: even the highest nap delay didn't work. */
+  ASSERT (0);
+}
+
+#endif /* GLTEST_NAP_H */
diff --git a/src/gl/tests/offtostr.c b/src/gl/tests/offtostr.c
new file mode 100644
index 0000000..96082aa
--- /dev/null
+++ b/src/gl/tests/offtostr.c
@@ -0,0 +1,3 @@
+#define anytostr offtostr
+#define inttype off_t
+#include "anytostr.c"
diff --git a/src/gl/tests/perror.c b/src/gl/tests/perror.c
new file mode 100644
index 0000000..d57331c
--- /dev/null
+++ b/src/gl/tests/perror.c
@@ -0,0 +1,49 @@
+/* Print a message describing error code.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible and Simon Josefsson.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "strerror-override.h"
+
+/* Use the system functions, not the gnulib overrides in this file.  */
+#undef fprintf
+
+void
+perror (const char *string)
+{
+  char stackbuf[STACKBUF_LEN];
+  int ret;
+
+  /* Our implementation guarantees that this will be a non-empty
+     string, even if it returns EINVAL; and stackbuf should be sized
+     large enough to avoid ERANGE.  */
+  ret = strerror_r (errno, stackbuf, sizeof stackbuf);
+  if (ret == ERANGE)
+    abort ();
+
+  if (string != NULL && *string != '\0')
+    fprintf (stderr, "%s: %s\n", string, stackbuf);
+  else
+    fprintf (stderr, "%s\n", stackbuf);
+}
diff --git a/src/gl/tests/pipe.c b/src/gl/tests/pipe.c
new file mode 100644
index 0000000..584965a
--- /dev/null
+++ b/src/gl/tests/pipe.c
@@ -0,0 +1,50 @@
+/* Create a pipe.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Native Windows API.  */
+
+/* Get _pipe().  */
+# include <io.h>
+
+/* Get _O_BINARY.  */
+# include <fcntl.h>
+
+int
+pipe (int fd[2])
+{
+  /* Mingw changes fd to {-1,-1} on failure, but this violates
+     http://austingroupbugs.net/view.php?id=467 */
+  int tmp[2];
+  int result = _pipe (tmp, 4096, _O_BINARY);
+  if (!result)
+    {
+      fd[0] = tmp[0];
+      fd[1] = tmp[1];
+    }
+  return result;
+}
+
+#else
+
+# error "This platform lacks a pipe function, and Gnulib doesn't provide a replacement. This is a bug in Gnulib."
+
+#endif
diff --git a/src/gl/tests/pthread-thread.c b/src/gl/tests/pthread-thread.c
new file mode 100644
index 0000000..664ea77
--- /dev/null
+++ b/src/gl/tests/pthread-thread.c
@@ -0,0 +1,178 @@
+/* Creating and controlling POSIX threads.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert, 2010, and Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <pthread.h>
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# include "windows-thread.h"
+#else
+# include <stdlib.h>
+#endif
+
+typedef void * (* pthread_main_function_t) (void *);
+
+#if ((defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS) || !HAVE_PTHREAD_H
+
+int
+pthread_attr_init (pthread_attr_t *attr)
+{
+  *attr = PTHREAD_CREATE_JOINABLE;
+  return 0;
+}
+
+int
+pthread_attr_getdetachstate (const pthread_attr_t *attr, int *detachstatep)
+{
+  *detachstatep = *attr & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED);
+  return 0;
+}
+
+int
+pthread_attr_setdetachstate (pthread_attr_t *attr, int detachstate)
+{
+  if (!(detachstate == PTHREAD_CREATE_JOINABLE
+        || detachstate == PTHREAD_CREATE_DETACHED))
+    return EINVAL;
+  *attr ^= (*attr ^ detachstate)
+           & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED);
+  return 0;
+}
+
+int
+pthread_attr_destroy (pthread_attr_t *attr _GL_UNUSED)
+{
+  return 0;
+}
+
+#endif
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+/* Use Windows threads.  */
+
+int
+pthread_create (pthread_t *threadp, const pthread_attr_t *attr,
+                pthread_main_function_t mainfunc, void *arg)
+{
+  unsigned int glwthread_attr =
+    (attr != NULL
+     && (*attr & (PTHREAD_CREATE_JOINABLE | PTHREAD_CREATE_DETACHED))
+        != PTHREAD_CREATE_JOINABLE
+     ? GLWTHREAD_ATTR_DETACHED
+     : 0);
+  return glwthread_thread_create (threadp, glwthread_attr, mainfunc, arg);
+}
+
+pthread_t
+pthread_self (void)
+{
+  return glwthread_thread_self ();
+}
+
+int
+pthread_equal (pthread_t thread1, pthread_t thread2)
+{
+  return thread1 == thread2;
+}
+
+int
+pthread_detach (pthread_t thread)
+{
+  return glwthread_thread_detach (thread);
+}
+
+int
+pthread_join (pthread_t thread, void **valuep)
+{
+  return glwthread_thread_join (thread, valuep);
+}
+
+void
+pthread_exit (void *value)
+{
+  glwthread_thread_exit (value);
+}
+
+#elif HAVE_PTHREAD_H
+/* Provide workarounds for POSIX threads.  */
+
+# if PTHREAD_CREATE_IS_INLINE
+int
+pthread_create (pthread_t *threadp, const pthread_attr_t *attr,
+                pthread_main_function_t mainfunc, void *arg)
+#  undef pthread_create
+{
+  return pthread_create (threadp, attr, mainfunc, arg);
+}
+
+int
+pthread_attr_init (pthread_attr_t *attr)
+#  undef pthread_attr_init
+{
+  return pthread_attr_init (attr);
+}
+
+# endif
+
+#else
+/* Provide a dummy implementation for single-threaded applications.  */
+
+int
+pthread_create (pthread_t *threadp, const pthread_attr_t *attr,
+                pthread_main_function_t mainfunc, void *arg)
+{
+  /* The maximum number of threads is reached.  Do not create a thread.  */
+  return EAGAIN;
+}
+
+pthread_t
+pthread_self (void)
+{
+  return 42;
+}
+
+int
+pthread_equal (pthread_t thread1, pthread_t thread2)
+{
+  return thread1 == thread2;
+}
+
+int
+pthread_detach (pthread_t thread)
+{
+  /* There are no joinable threads.  */
+  return EINVAL;
+}
+
+int
+pthread_join (pthread_t thread, void **valuep)
+{
+  /* There are no joinable threads.  */
+  return EINVAL;
+}
+
+void
+pthread_exit (void *value)
+{
+  /* There is just one thread, so the process exits.  */
+  exit (0);
+}
+
+#endif
diff --git a/src/gl/tests/pthread.in.h b/src/gl/tests/pthread.in.h
new file mode 100644
index 0000000..dcfb1f3
--- /dev/null
+++ b/src/gl/tests/pthread.in.h
@@ -0,0 +1,1963 @@
+/* Implement the most essential subset of POSIX 1003.1-2008 pthread.h.
+
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert, Glen Lenker, and Bruno Haible.  */
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+#if defined _GL_ALREADY_INCLUDING_PTHREAD_H
+/* Special invocation convention:
+   On Android, we have a sequence of nested includes
+   <pthread.h> -> <time.h> -> <sys/time.h> -> <sys/select.h> ->
+   <signal.h> -> <pthread.h>.
+   In this situation, PTHREAD_COND_INITIALIZER is not yet defined,
+   therefore we should not attempt to define PTHREAD_MUTEX_NORMAL etc.  */
+
+#@INCLUDE_NEXT@ @NEXT_PTHREAD_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_PTHREAD_H_
+
+#if @HAVE_PTHREAD_H@
+
+# define _GL_ALREADY_INCLUDING_PTHREAD_H
+
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_PTHREAD_H@
+
+# undef _GL_ALREADY_INCLUDING_PTHREAD_H
+
+#endif
+
+#ifndef _@GUARD_PREFIX@_PTHREAD_H_
+#define _@GUARD_PREFIX@_PTHREAD_H_
+
+#define __need_system_stdlib_h
+#include <stdlib.h>
+#undef __need_system_stdlib_h
+
+
+/* The pthreads-win32 <pthread.h> defines a couple of broken macros.  */
+#undef asctime_r
+#undef ctime_r
+#undef gmtime_r
+#undef localtime_r
+#undef rand_r
+#undef strtok_r
+
+#include <errno.h>
+#include <sched.h>
+#include <sys/types.h>
+#include <time.h>
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _Noreturn is copied here.  */
+
+/* The definition of _GL_ARG_NONNULL is copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+/* =========== Thread types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_THREAD@
+#  include "windows-thread.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_t rpl_pthread_t
+#   define pthread_attr_t rpl_pthread_attr_t
+#  endif
+#  if !GNULIB_defined_pthread_thread_types
+typedef glwthread_thread_t pthread_t;
+typedef unsigned int pthread_attr_t;
+#   define GNULIB_defined_pthread_thread_types 1
+#  endif
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_t rpl_pthread_t
+#   define pthread_attr_t rpl_pthread_attr_t
+#  endif
+#  if !GNULIB_defined_pthread_thread_types
+typedef int pthread_t;
+typedef unsigned int pthread_attr_t;
+#   define GNULIB_defined_pthread_thread_types 1
+#  endif
+# endif
+# undef PTHREAD_CREATE_JOINABLE
+# undef PTHREAD_CREATE_DETACHED
+# define PTHREAD_CREATE_JOINABLE 0
+# define PTHREAD_CREATE_DETACHED 1
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_thread_types
+typedef int pthread_t;
+typedef unsigned int pthread_attr_t;
+#   define GNULIB_defined_pthread_thread_types 1
+#  endif
+# endif
+# if !@HAVE_PTHREAD_CREATE_DETACHED@
+#  define PTHREAD_CREATE_JOINABLE 0
+#  define PTHREAD_CREATE_DETACHED 1
+# endif
+#endif
+
+/* =========== Once-only control (initialization) types and macros ========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_ONCE@
+#  include "windows-once.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_once_t rpl_pthread_once_t
+#  endif
+#  if !GNULIB_defined_pthread_once_types
+typedef glwthread_once_t pthread_once_t;
+#   define GNULIB_defined_pthread_once_types 1
+#  endif
+#  undef PTHREAD_ONCE_INIT
+#  define PTHREAD_ONCE_INIT GLWTHREAD_ONCE_INIT
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_once_t rpl_pthread_once_t
+#  endif
+#  if !GNULIB_defined_pthread_once_types
+typedef int pthread_once_t;
+#   define GNULIB_defined_pthread_once_types 1
+#  endif
+#  undef PTHREAD_ONCE_INIT
+#  define PTHREAD_ONCE_INIT { 0 }
+# endif
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_once_types
+typedef int pthread_once_t;
+#   define GNULIB_defined_pthread_once_types 1
+#  endif
+#  undef PTHREAD_ONCE_INIT
+#  define PTHREAD_ONCE_INIT { 0 }
+# endif
+#endif
+
+/* =========== Mutex types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_MUTEX@
+#  include "windows-timedmutex.h"
+#  include "windows-timedrecmutex.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_mutex_t rpl_pthread_mutex_t
+#   define pthread_mutexattr_t rpl_pthread_mutexattr_t
+#  endif
+#  if !GNULIB_defined_pthread_mutex_types
+typedef struct
+        {
+          int type;
+          union
+            {
+              glwthread_timedmutex_t    u_timedmutex;
+              glwthread_timedrecmutex_t u_timedrecmutex;
+            }
+          u;
+        }
+        pthread_mutex_t;
+typedef unsigned int pthread_mutexattr_t;
+#   define GNULIB_defined_pthread_mutex_types 1
+#  endif
+#  undef PTHREAD_MUTEX_INITIALIZER
+#  define PTHREAD_MUTEX_INITIALIZER { 1, { GLWTHREAD_TIMEDMUTEX_INIT } }
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_mutex_t rpl_pthread_mutex_t
+#   define pthread_mutexattr_t rpl_pthread_mutexattr_t
+#  endif
+#  if !GNULIB_defined_pthread_mutex_types
+typedef int pthread_mutex_t;
+typedef unsigned int pthread_mutexattr_t;
+#   define GNULIB_defined_pthread_mutex_types 1
+#  endif
+#  undef PTHREAD_MUTEX_INITIALIZER
+#  define PTHREAD_MUTEX_INITIALIZER { 0 }
+# endif
+# undef PTHREAD_MUTEX_DEFAULT
+# undef PTHREAD_MUTEX_NORMAL
+# undef PTHREAD_MUTEX_ERRORCHECK
+# undef PTHREAD_MUTEX_RECURSIVE
+# define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
+# define PTHREAD_MUTEX_NORMAL 0
+# define PTHREAD_MUTEX_ERRORCHECK 1
+# define PTHREAD_MUTEX_RECURSIVE 2
+# undef PTHREAD_MUTEX_STALLED
+# undef PTHREAD_MUTEX_ROBUST
+# define PTHREAD_MUTEX_STALLED 0
+# define PTHREAD_MUTEX_ROBUST 1
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_mutex_types
+typedef int pthread_mutex_t;
+typedef unsigned int pthread_mutexattr_t;
+#   define GNULIB_defined_pthread_mutex_types 1
+#  endif
+#  undef PTHREAD_MUTEX_INITIALIZER
+#  define PTHREAD_MUTEX_INITIALIZER { 0 }
+# endif
+# if !@HAVE_PTHREAD_MUTEX_RECURSIVE@
+#  define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
+#  define PTHREAD_MUTEX_NORMAL 0
+#  define PTHREAD_MUTEX_ERRORCHECK 1
+#  define PTHREAD_MUTEX_RECURSIVE 2
+# endif
+# if !@HAVE_PTHREAD_MUTEX_ROBUST@
+#  define PTHREAD_MUTEX_STALLED 0
+#  define PTHREAD_MUTEX_ROBUST 1
+# endif
+#endif
+
+/* =========== Read-write lock types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_RWLOCK@
+#  include "windows-timedrwlock.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_rwlock_t rpl_pthread_rwlock_t
+#   define pthread_rwlockattr_t rpl_pthread_rwlockattr_t
+#  endif
+#  if !GNULIB_defined_pthread_rwlock_types
+typedef glwthread_timedrwlock_t pthread_rwlock_t;
+typedef unsigned int pthread_rwlockattr_t;
+#   define GNULIB_defined_pthread_rwlock_types 1
+#  endif
+#  undef PTHREAD_RWLOCK_INITIALIZER
+#  define PTHREAD_RWLOCK_INITIALIZER GLWTHREAD_TIMEDRWLOCK_INIT
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_rwlock_t rpl_pthread_rwlock_t
+#   define pthread_rwlockattr_t rpl_pthread_rwlockattr_t
+#  endif
+#  if !GNULIB_defined_pthread_rwlock_types
+typedef int pthread_rwlock_t;
+typedef unsigned int pthread_rwlockattr_t;
+#   define GNULIB_defined_pthread_rwlock_types 1
+#  endif
+#  undef PTHREAD_RWLOCK_INITIALIZER
+#  define PTHREAD_RWLOCK_INITIALIZER { 0 }
+# endif
+#elif @GNULIB_PTHREAD_RWLOCK@ && @REPLACE_PTHREAD_RWLOCK_INIT@ /* i.e. PTHREAD_RWLOCK_UNIMPLEMENTED */
+# if @HAVE_PTHREAD_T@
+#  define pthread_rwlock_t rpl_pthread_rwlock_t
+#  define pthread_rwlockattr_t rpl_pthread_rwlockattr_t
+# endif
+# if !GNULIB_defined_pthread_rwlock_types
+typedef struct
+        {
+          pthread_mutex_t lock; /* protects the remaining fields */
+          pthread_cond_t waiting_readers; /* waiting readers */
+          pthread_cond_t waiting_writers; /* waiting writers */
+          unsigned int waiting_writers_count; /* number of waiting writers */
+          int runcount; /* number of readers running, or -1 when a writer runs */
+        }
+        pthread_rwlock_t;
+typedef unsigned int pthread_rwlockattr_t;
+#  define GNULIB_defined_pthread_rwlock_types 1
+# endif
+# undef PTHREAD_RWLOCK_INITIALIZER
+# define PTHREAD_RWLOCK_INITIALIZER \
+   { PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER, 0, 0 }
+#else
+# if @HAVE_PTHREAD_T@
+#  if !defined PTHREAD_RWLOCK_INITIALIZER && defined PTHREAD_RWLOCK_INITIALIZER_NP /* z/OS */
+#   define PTHREAD_RWLOCK_INITIALIZER PTHREAD_RWLOCK_INITIALIZER_NP
+#  endif
+# else
+#  if !GNULIB_defined_pthread_rwlock_types
+typedef int pthread_rwlock_t;
+typedef unsigned int pthread_rwlockattr_t;
+#   define GNULIB_defined_pthread_rwlock_types 1
+#  endif
+#  undef PTHREAD_RWLOCK_INITIALIZER
+#  define PTHREAD_RWLOCK_INITIALIZER { 0 }
+# endif
+#endif
+
+/* =========== Condition variable types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_COND@
+#  include "windows-cond.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_cond_t rpl_pthread_cond_t
+#   define pthread_condattr_t rpl_pthread_condattr_t
+#  endif
+#  if !GNULIB_defined_pthread_cond_types
+typedef glwthread_cond_t pthread_cond_t;
+typedef unsigned int pthread_condattr_t;
+#   define GNULIB_defined_pthread_cond_types 1
+#  endif
+#  undef PTHREAD_COND_INITIALIZER
+#  define PTHREAD_COND_INITIALIZER GLWTHREAD_COND_INIT
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_cond_t rpl_pthread_cond_t
+#   define pthread_condattr_t rpl_pthread_condattr_t
+#  endif
+#  if !GNULIB_defined_pthread_cond_types
+typedef int pthread_cond_t;
+typedef unsigned int pthread_condattr_t;
+#   define GNULIB_defined_pthread_cond_types 1
+#  endif
+#  undef PTHREAD_COND_INITIALIZER
+#  define PTHREAD_COND_INITIALIZER { 0 }
+# endif
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_cond_types
+typedef int pthread_cond_t;
+typedef unsigned int pthread_condattr_t;
+#   define GNULIB_defined_pthread_cond_types 1
+#  endif
+#  undef PTHREAD_COND_INITIALIZER
+#  define PTHREAD_COND_INITIALIZER { 0 }
+# endif
+#endif
+
+/* =========== Thread-specific storage types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_TSS@
+#  include "windows-tls.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_key_t rpl_pthread_key_t
+#  endif
+#  if !GNULIB_defined_pthread_tss_types
+typedef glwthread_tls_key_t pthread_key_t;
+#   define GNULIB_defined_pthread_tss_types 1
+#  endif
+#  undef PTHREAD_DESTRUCTOR_ITERATIONS
+#  define PTHREAD_DESTRUCTOR_ITERATIONS GLWTHREAD_DESTRUCTOR_ITERATIONS
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_key_t rpl_pthread_key_t
+#  endif
+#  if !GNULIB_defined_pthread_tss_types
+typedef void ** pthread_key_t;
+#   define GNULIB_defined_pthread_tss_types 1
+#  endif
+#  undef PTHREAD_DESTRUCTOR_ITERATIONS
+#  define PTHREAD_DESTRUCTOR_ITERATIONS 0
+# endif
+#else
+# if !@HAVE_PTHREAD_T@
+#  if !GNULIB_defined_pthread_tss_types
+typedef void ** pthread_key_t;
+#   define GNULIB_defined_pthread_tss_types 1
+#  endif
+#  undef PTHREAD_DESTRUCTOR_ITERATIONS
+#  define PTHREAD_DESTRUCTOR_ITERATIONS 0
+# endif
+#endif
+
+/* =========== Spinlock types and macros =========== */
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# if @GNULIB_PTHREAD_SPIN@
+#  include "windows-spin.h"
+#  if @HAVE_PTHREAD_T@
+#   define pthread_spinlock_t rpl_pthread_spinlock_t
+#  endif
+#  if !GNULIB_defined_pthread_spin_types
+typedef glwthread_spinlock_t pthread_spinlock_t;
+#   define GNULIB_defined_pthread_spin_types 1
+#  endif
+# else
+#  if @HAVE_PTHREAD_T@
+#   define pthread_spinlock_t rpl_pthread_spinlock_t
+#  endif
+#  if !GNULIB_defined_pthread_spin_types
+typedef pthread_mutex_t pthread_spinlock_t;
+#   define GNULIB_defined_pthread_spin_types 1
+#  endif
+# endif
+# undef PTHREAD_PROCESS_PRIVATE
+# undef PTHREAD_PROCESS_SHARED
+# define PTHREAD_PROCESS_PRIVATE 0
+# define PTHREAD_PROCESS_SHARED 1
+#else
+# if !@HAVE_PTHREAD_SPINLOCK_T@
+/* Approximate spinlocks with mutexes.  */
+#  if !GNULIB_defined_pthread_spin_types
+typedef pthread_mutex_t pthread_spinlock_t;
+#   define GNULIB_defined_pthread_spin_types 1
+#  endif
+# endif
+# if !@HAVE_PTHREAD_PROCESS_SHARED@
+#  define PTHREAD_PROCESS_PRIVATE 0
+#  define PTHREAD_PROCESS_SHARED 1
+# endif
+#endif
+
+/* =========== Other types and macros =========== */
+
+#if !@HAVE_PTHREAD_T@
+# if !GNULIB_defined_other_pthread_types
+typedef int pthread_barrier_t;
+typedef unsigned int pthread_barrierattr_t;
+#  define GNULIB_defined_other_pthread_types 1
+# endif
+#endif
+
+#if !defined PTHREAD_CANCELED
+
+# define PTHREAD_BARRIER_SERIAL_THREAD (-1)
+
+# define PTHREAD_CANCEL_DEFERRED 0
+# define PTHREAD_CANCEL_ASYNCHRONOUS 1
+
+# define PTHREAD_CANCEL_ENABLE 0
+# define PTHREAD_CANCEL_DISABLE 1
+
+# define PTHREAD_CANCELED ((void *) -1)
+
+# define PTHREAD_INHERIT_SCHED 0
+# define PTHREAD_EXPLICIT_SCHED 1
+
+# define PTHREAD_PRIO_NONE 0
+# define PTHREAD_PRIO_INHERIT 1
+# define PTHREAD_PRIO_PROTECT 2
+
+# define PTHREAD_SCOPE_SYSTEM 0
+# define PTHREAD_SCOPE_PROCESS 1
+
+#endif
+
+/* =========== Thread functions =========== */
+
+#if @GNULIB_PTHREAD_THREAD@
+/* The 'restrict' qualifier on ARG is nonsense, but POSIX specifies it this way.
+   Sigh.  */
+# if @REPLACE_PTHREAD_CREATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_create
+#   define pthread_create rpl_pthread_create
+#  endif
+_GL_FUNCDECL_RPL (pthread_create, int,
+                  (pthread_t *restrict threadp,
+                   const pthread_attr_t *restrict attr,
+                   void * (*mainfunc) (void *), void *restrict arg)
+                  _GL_ARG_NONNULL ((1, 3)));
+_GL_CXXALIAS_RPL (pthread_create, int,
+                  (pthread_t *restrict threadp,
+                   const pthread_attr_t *restrict attr,
+                   void * (*mainfunc) (void *), void *restrict arg));
+# else
+#  if !@HAVE_PTHREAD_CREATE@
+_GL_FUNCDECL_SYS (pthread_create, int,
+                  (pthread_t *restrict threadp,
+                   const pthread_attr_t *restrict attr,
+                   void * (*mainfunc) (void *), void *restrict arg)
+                  _GL_ARG_NONNULL ((1, 3)));
+#  endif
+_GL_CXXALIAS_SYS_CAST (pthread_create, int,
+                       (pthread_t *restrict threadp,
+                        const pthread_attr_t *restrict attr,
+                        void * (*mainfunc) (void *), void *restrict arg));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_create);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_create
+# if HAVE_RAW_DECL_PTHREAD_CREATE
+_GL_WARN_ON_USE (pthread_create, "pthread_create is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_ATTR_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_attr_init
+#   define pthread_attr_init rpl_pthread_attr_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_attr_init, int, (pthread_attr_t *attr)
+                                          _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_attr_init, int, (pthread_attr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_ATTR_INIT@
+_GL_FUNCDECL_SYS (pthread_attr_init, int, (pthread_attr_t *attr)
+                                          _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_attr_init, int, (pthread_attr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_attr_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_attr_init
+# if HAVE_RAW_DECL_PTHREAD_ATTR_INIT
+_GL_WARN_ON_USE (pthread_attr_init, "pthread_attr_init is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_ATTR_GETDETACHSTATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_attr_getdetachstate
+#   define pthread_attr_getdetachstate rpl_pthread_attr_getdetachstate
+#  endif
+_GL_FUNCDECL_RPL (pthread_attr_getdetachstate, int,
+                  (const pthread_attr_t *attr, int *detachstatep)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_attr_getdetachstate, int,
+                  (const pthread_attr_t *attr, int *detachstatep));
+# else
+#  if !@HAVE_PTHREAD_ATTR_GETDETACHSTATE@
+_GL_FUNCDECL_SYS (pthread_attr_getdetachstate, int,
+                  (const pthread_attr_t *attr, int *detachstatep)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_attr_getdetachstate, int,
+                  (const pthread_attr_t *attr, int *detachstatep));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_attr_getdetachstate);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_attr_getdetachstate
+# if HAVE_RAW_DECL_PTHREAD_ATTR_GETDETACHSTATE
+_GL_WARN_ON_USE (pthread_attr_getdetachstate, "pthread_attr_getdetachstate is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_ATTR_SETDETACHSTATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_attr_setdetachstate
+#   define pthread_attr_setdetachstate rpl_pthread_attr_setdetachstate
+#  endif
+_GL_FUNCDECL_RPL (pthread_attr_setdetachstate, int,
+                  (pthread_attr_t *attr, int detachstate)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_attr_setdetachstate, int,
+                  (pthread_attr_t *attr, int detachstate));
+# else
+#  if !@HAVE_PTHREAD_ATTR_SETDETACHSTATE@
+_GL_FUNCDECL_SYS (pthread_attr_setdetachstate, int,
+                  (pthread_attr_t *attr, int detachstate)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_attr_setdetachstate, int,
+                  (pthread_attr_t *attr, int detachstate));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_attr_setdetachstate);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_attr_setdetachstate
+# if HAVE_RAW_DECL_PTHREAD_ATTR_SETDETACHSTATE
+_GL_WARN_ON_USE (pthread_attr_setdetachstate, "pthread_attr_setdetachstate is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_ATTR_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_attr_destroy
+#   define pthread_attr_destroy rpl_pthread_attr_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_attr_destroy, int, (pthread_attr_t *attr)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_attr_destroy, int, (pthread_attr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_ATTR_DESTROY@
+_GL_FUNCDECL_SYS (pthread_attr_destroy, int, (pthread_attr_t *attr)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_attr_destroy, int, (pthread_attr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_attr_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_attr_destroy
+# if HAVE_RAW_DECL_PTHREAD_ATTR_DESTROY
+_GL_WARN_ON_USE (pthread_attr_destroy, "pthread_attr_destroy is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_SELF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_self
+#   define pthread_self rpl_pthread_self
+#  endif
+_GL_FUNCDECL_RPL (pthread_self, pthread_t, (void) _GL_ATTRIBUTE_PURE);
+_GL_CXXALIAS_RPL (pthread_self, pthread_t, (void));
+# else
+#  if !@HAVE_PTHREAD_SELF@
+_GL_FUNCDECL_SYS (pthread_self, pthread_t, (void) _GL_ATTRIBUTE_PURE);
+#  endif
+_GL_CXXALIAS_SYS (pthread_self, pthread_t, (void));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_self);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_self
+# if HAVE_RAW_DECL_PTHREAD_SELF
+_GL_WARN_ON_USE (pthread_self, "pthread_self is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_EQUAL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_equal
+#   define pthread_equal rpl_pthread_equal
+#  endif
+_GL_FUNCDECL_RPL (pthread_equal, int, (pthread_t thread1, pthread_t thread2));
+_GL_CXXALIAS_RPL (pthread_equal, int, (pthread_t thread1, pthread_t thread2));
+# else
+#  if !@HAVE_PTHREAD_EQUAL@
+_GL_FUNCDECL_SYS (pthread_equal, int, (pthread_t thread1, pthread_t thread2));
+#  endif
+_GL_CXXALIAS_SYS (pthread_equal, int, (pthread_t thread1, pthread_t thread2));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_equal);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_equal
+# if HAVE_RAW_DECL_PTHREAD_EQUAL
+_GL_WARN_ON_USE (pthread_equal, "pthread_equal is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_DETACH@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_detach
+#   define pthread_detach rpl_pthread_detach
+#  endif
+_GL_FUNCDECL_RPL (pthread_detach, int, (pthread_t thread));
+_GL_CXXALIAS_RPL (pthread_detach, int, (pthread_t thread));
+# else
+#  if !@HAVE_PTHREAD_DETACH@
+_GL_FUNCDECL_SYS (pthread_detach, int, (pthread_t thread));
+#  endif
+_GL_CXXALIAS_SYS (pthread_detach, int, (pthread_t thread));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_detach);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_detach
+# if HAVE_RAW_DECL_PTHREAD_DETACH
+_GL_WARN_ON_USE (pthread_detach, "pthread_detach is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_JOIN@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_join
+#   define pthread_join rpl_pthread_join
+#  endif
+_GL_FUNCDECL_RPL (pthread_join, int, (pthread_t thread, void **valuep));
+_GL_CXXALIAS_RPL (pthread_join, int, (pthread_t thread, void **valuep));
+# else
+#  if !@HAVE_PTHREAD_JOIN@
+_GL_FUNCDECL_SYS (pthread_join, int, (pthread_t thread, void **valuep));
+#  endif
+_GL_CXXALIAS_SYS (pthread_join, int, (pthread_t thread, void **valuep));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_join);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_join
+# if HAVE_RAW_DECL_PTHREAD_JOIN
+_GL_WARN_ON_USE (pthread_join, "pthread_join is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_THREAD@
+# if @REPLACE_PTHREAD_EXIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_exit
+#   define pthread_exit rpl_pthread_exit
+#  endif
+_GL_FUNCDECL_RPL (pthread_exit, _Noreturn void, (void *value));
+_GL_CXXALIAS_RPL (pthread_exit, void, (void *value));
+# else
+#  if !@HAVE_PTHREAD_EXIT@
+_GL_FUNCDECL_SYS (pthread_exit, _Noreturn void, (void *value));
+#  endif
+/* Need to cast because of AIX with xlclang++.  */
+_GL_CXXALIAS_SYS_CAST (pthread_exit, void, (void *value));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_exit);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_exit
+# if HAVE_RAW_DECL_PTHREAD_EXIT
+_GL_WARN_ON_USE (pthread_exit, "pthread_exit is not portable - "
+                 "use gnulib module pthread-thread for portability");
+# endif
+#endif
+
+/* =========== Once-only control (initialization) functions =========== */
+
+#if @GNULIB_PTHREAD_ONCE@
+# if @REPLACE_PTHREAD_ONCE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_once
+#   define pthread_once rpl_pthread_once
+#  endif
+_GL_FUNCDECL_RPL (pthread_once, int,
+                  (pthread_once_t *once_control, void (*initfunction) (void))
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_once, int,
+                  (pthread_once_t *once_control, void (*initfunction) (void)));
+# else
+#  if !@HAVE_PTHREAD_ONCE@
+_GL_FUNCDECL_SYS (pthread_once, int,
+                  (pthread_once_t *once_control, void (*initfunction) (void))
+                   _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS_CAST (pthread_once, int,
+                       (pthread_once_t *once_control,
+                        void (*initfunction) (void)));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_once);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_once
+# if HAVE_RAW_DECL_PTHREAD_ONCE
+_GL_WARN_ON_USE (pthread_once, "pthread_once is not portable - "
+                 "use gnulib module pthread-once for portability");
+# endif
+#endif
+
+/* =========== Mutex functions =========== */
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_init
+#   define pthread_mutex_init rpl_pthread_mutex_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_init, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const pthread_mutexattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_init, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const pthread_mutexattr_t *restrict attr));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_INIT@
+_GL_FUNCDECL_SYS (pthread_mutex_init, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const pthread_mutexattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_init, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const pthread_mutexattr_t *restrict attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_init
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_INIT
+_GL_WARN_ON_USE (pthread_mutex_init, "pthread_mutex_init is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_init
+#   define pthread_mutexattr_init rpl_pthread_mutexattr_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_init, int, (pthread_mutexattr_t *attr)
+                                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_init, int, (pthread_mutexattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_INIT@
+_GL_FUNCDECL_SYS (pthread_mutexattr_init, int, (pthread_mutexattr_t *attr)
+                                               _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutexattr_init, int, (pthread_mutexattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_init
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_INIT
+_GL_WARN_ON_USE (pthread_mutexattr_init, "pthread_mutexattr_init is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_GETTYPE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_gettype
+#   define pthread_mutexattr_gettype rpl_pthread_mutexattr_gettype
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_gettype, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict typep)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_gettype, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict typep));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_GETTYPE@
+_GL_FUNCDECL_SYS (pthread_mutexattr_gettype, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict typep)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+/* Need to cast, because on FreeBSD the first parameter is
+                        pthread_mutexattr_t *attr.  */
+_GL_CXXALIAS_SYS_CAST (pthread_mutexattr_gettype, int,
+                       (const pthread_mutexattr_t *restrict attr,
+                        int *restrict typep));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_gettype);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_gettype
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_GETTYPE
+_GL_WARN_ON_USE (pthread_mutexattr_gettype, "pthread_mutexattr_gettype is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_SETTYPE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_settype
+#   define pthread_mutexattr_settype rpl_pthread_mutexattr_settype
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_settype, int,
+                  (pthread_mutexattr_t *attr, int type) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_settype, int,
+                  (pthread_mutexattr_t *attr, int type));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_SETTYPE@
+_GL_FUNCDECL_SYS (pthread_mutexattr_settype, int,
+                  (pthread_mutexattr_t *attr, int type) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutexattr_settype, int,
+                  (pthread_mutexattr_t *attr, int type));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_settype);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_settype
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_SETTYPE
+_GL_WARN_ON_USE (pthread_mutexattr_settype, "pthread_mutexattr_settype is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_GETROBUST@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_getrobust
+#   define pthread_mutexattr_getrobust rpl_pthread_mutexattr_getrobust
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_getrobust, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict robustp)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_getrobust, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict robustp));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_GETROBUST@
+_GL_FUNCDECL_SYS (pthread_mutexattr_getrobust, int,
+                  (const pthread_mutexattr_t *restrict attr,
+                   int *restrict robustp)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+/* Need to cast, because on FreeBSD the first parameter is
+                        pthread_mutexattr_t *attr.  */
+_GL_CXXALIAS_SYS_CAST (pthread_mutexattr_getrobust, int,
+                       (const pthread_mutexattr_t *restrict attr,
+                        int *restrict robustp));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_getrobust);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_getrobust
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_GETROBUST
+_GL_WARN_ON_USE (pthread_mutexattr_getrobust, "pthread_mutexattr_getrobust is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_SETROBUST@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_setrobust
+#   define pthread_mutexattr_setrobust rpl_pthread_mutexattr_setrobust
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_setrobust, int,
+                  (pthread_mutexattr_t *attr, int robust)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_setrobust, int,
+                  (pthread_mutexattr_t *attr, int robust));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_SETROBUST@
+_GL_FUNCDECL_SYS (pthread_mutexattr_setrobust, int,
+                  (pthread_mutexattr_t *attr, int robust)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutexattr_setrobust, int,
+                  (pthread_mutexattr_t *attr, int robust));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_setrobust);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_setrobust
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_SETROBUST
+_GL_WARN_ON_USE (pthread_mutexattr_setrobust, "pthread_mutexattr_setrobust is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEXATTR_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutexattr_destroy
+#   define pthread_mutexattr_destroy rpl_pthread_mutexattr_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutexattr_destroy, int, (pthread_mutexattr_t *attr)
+                                                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutexattr_destroy, int, (pthread_mutexattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_MUTEXATTR_DESTROY@
+_GL_FUNCDECL_SYS (pthread_mutexattr_destroy, int, (pthread_mutexattr_t *attr)
+                                                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutexattr_destroy, int, (pthread_mutexattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutexattr_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutexattr_destroy
+# if HAVE_RAW_DECL_PTHREAD_MUTEXATTR_DESTROY
+_GL_WARN_ON_USE (pthread_mutexattr_destroy, "pthread_mutexattr_destroy is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_LOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_lock
+#   define pthread_mutex_lock rpl_pthread_mutex_lock
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_lock, int, (pthread_mutex_t *mutex)
+                                           _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_lock, int, (pthread_mutex_t *mutex));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_LOCK@
+_GL_FUNCDECL_SYS (pthread_mutex_lock, int, (pthread_mutex_t *mutex)
+                                           _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_lock, int, (pthread_mutex_t *mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_lock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_lock
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_LOCK
+_GL_WARN_ON_USE (pthread_mutex_lock, "pthread_mutex_lock is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_TRYLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_trylock
+#   define pthread_mutex_trylock rpl_pthread_mutex_trylock
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_trylock, int, (pthread_mutex_t *mutex)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_trylock, int, (pthread_mutex_t *mutex));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_TRYLOCK@
+_GL_FUNCDECL_SYS (pthread_mutex_trylock, int, (pthread_mutex_t *mutex)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_trylock, int, (pthread_mutex_t *mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_trylock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_trylock
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_TRYLOCK
+_GL_WARN_ON_USE (pthread_mutex_trylock, "pthread_mutex_trylock is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX_TIMEDLOCK@
+# if @REPLACE_PTHREAD_MUTEX_TIMEDLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_timedlock
+#   define pthread_mutex_timedlock rpl_pthread_mutex_timedlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_timedlock, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_mutex_timedlock, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_TIMEDLOCK@
+_GL_FUNCDECL_SYS (pthread_mutex_timedlock, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_timedlock, int,
+                  (pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_timedlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_timedlock
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_TIMEDLOCK
+_GL_WARN_ON_USE (pthread_mutex_timedlock, "pthread_mutex_timedlock is not portable - "
+                 "use gnulib module pthread_mutex_timedlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_UNLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_unlock
+#   define pthread_mutex_unlock rpl_pthread_mutex_unlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_unlock, int, (pthread_mutex_t *mutex)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_unlock, int, (pthread_mutex_t *mutex));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_UNLOCK@
+_GL_FUNCDECL_SYS (pthread_mutex_unlock, int, (pthread_mutex_t *mutex)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_unlock, int, (pthread_mutex_t *mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_unlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_unlock
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_UNLOCK
+_GL_WARN_ON_USE (pthread_mutex_unlock, "pthread_mutex_unlock is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_MUTEX@
+# if @REPLACE_PTHREAD_MUTEX_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_mutex_destroy
+#   define pthread_mutex_destroy rpl_pthread_mutex_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_mutex_destroy, int, (pthread_mutex_t *mutex)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_mutex_destroy, int, (pthread_mutex_t *mutex));
+# else
+#  if !@HAVE_PTHREAD_MUTEX_DESTROY@
+_GL_FUNCDECL_SYS (pthread_mutex_destroy, int, (pthread_mutex_t *mutex)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_mutex_destroy, int, (pthread_mutex_t *mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_mutex_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_mutex_destroy
+# if HAVE_RAW_DECL_PTHREAD_MUTEX_DESTROY
+_GL_WARN_ON_USE (pthread_mutex_destroy, "pthread_mutex_destroy is not portable - "
+                 "use gnulib module pthread-mutex for portability");
+# endif
+#endif
+
+/* =========== Read-write lock functions =========== */
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_init
+#   define pthread_rwlock_init rpl_pthread_rwlock_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_init, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const pthread_rwlockattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_init, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const pthread_rwlockattr_t *restrict attr));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_INIT@
+_GL_FUNCDECL_SYS (pthread_rwlock_init, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const pthread_rwlockattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_init, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const pthread_rwlockattr_t *restrict attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_init
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_INIT
+_GL_WARN_ON_USE (pthread_rwlock_init, "pthread_rwlock_init is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCKATTR_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlockattr_init
+#   define pthread_rwlockattr_init rpl_pthread_rwlockattr_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlockattr_init, int, (pthread_rwlockattr_t *attr)
+                                                _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlockattr_init, int, (pthread_rwlockattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_RWLOCKATTR_INIT@
+_GL_FUNCDECL_SYS (pthread_rwlockattr_init, int, (pthread_rwlockattr_t *attr)
+                                                _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlockattr_init, int, (pthread_rwlockattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlockattr_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlockattr_init
+# if HAVE_RAW_DECL_PTHREAD_RWLOCKATTR_INIT
+_GL_WARN_ON_USE (pthread_rwlockattr_init, "pthread_rwlockattr_init is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCKATTR_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlockattr_destroy
+#   define pthread_rwlockattr_destroy rpl_pthread_rwlockattr_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlockattr_destroy, int,
+                  (pthread_rwlockattr_t *attr) _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlockattr_destroy, int,
+                  (pthread_rwlockattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_RWLOCKATTR_DESTROY@
+_GL_FUNCDECL_SYS (pthread_rwlockattr_destroy, int,
+                  (pthread_rwlockattr_t *attr) _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlockattr_destroy, int,
+                  (pthread_rwlockattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlockattr_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlockattr_destroy
+# if HAVE_RAW_DECL_PTHREAD_RWLOCKATTR_DESTROY
+_GL_WARN_ON_USE (pthread_rwlockattr_destroy, "pthread_rwlockattr_destroy is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_RDLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_rdlock
+#   define pthread_rwlock_rdlock rpl_pthread_rwlock_rdlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_rdlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_rdlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_RDLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_rdlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_rdlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_rdlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_rdlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_RDLOCK
+_GL_WARN_ON_USE (pthread_rwlock_rdlock, "pthread_rwlock_rdlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_WRLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_wrlock
+#   define pthread_rwlock_wrlock rpl_pthread_rwlock_wrlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_wrlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_wrlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_WRLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_wrlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_wrlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_wrlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_wrlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_WRLOCK
+_GL_WARN_ON_USE (pthread_rwlock_wrlock, "pthread_rwlock_wrlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_TRYRDLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_tryrdlock
+#   define pthread_rwlock_tryrdlock rpl_pthread_rwlock_tryrdlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_tryrdlock, int, (pthread_rwlock_t *lock)
+                                                 _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_tryrdlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_TRYRDLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_tryrdlock, int, (pthread_rwlock_t *lock)
+                                                 _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_tryrdlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_tryrdlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_tryrdlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_TRYRDLOCK
+_GL_WARN_ON_USE (pthread_rwlock_tryrdlock, "pthread_rwlock_tryrdlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_TRYWRLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_trywrlock
+#   define pthread_rwlock_trywrlock rpl_pthread_rwlock_trywrlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_trywrlock, int, (pthread_rwlock_t *lock)
+                                                 _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_trywrlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_TRYWRLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_trywrlock, int, (pthread_rwlock_t *lock)
+                                                 _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_trywrlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_trywrlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_trywrlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_TRYWRLOCK
+_GL_WARN_ON_USE (pthread_rwlock_trywrlock, "pthread_rwlock_trywrlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_timedrdlock
+#   define pthread_rwlock_timedrdlock rpl_pthread_rwlock_timedrdlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_timedrdlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_rwlock_timedrdlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_timedrdlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_timedrdlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_timedrdlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_timedrdlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_TIMEDRDLOCK
+_GL_WARN_ON_USE (pthread_rwlock_timedrdlock, "pthread_rwlock_timedrdlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_timedwrlock
+#   define pthread_rwlock_timedwrlock rpl_pthread_rwlock_timedwrlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_timedwrlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_rwlock_timedwrlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_timedwrlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_timedwrlock, int,
+                  (pthread_rwlock_t *restrict lock,
+                   const struct timespec *restrict abstime));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_timedwrlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_timedwrlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_TIMEDWRLOCK
+_GL_WARN_ON_USE (pthread_rwlock_timedwrlock, "pthread_rwlock_timedwrlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_UNLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_unlock
+#   define pthread_rwlock_unlock rpl_pthread_rwlock_unlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_unlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_unlock, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_UNLOCK@
+_GL_FUNCDECL_SYS (pthread_rwlock_unlock, int, (pthread_rwlock_t *lock)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_unlock, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_unlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_unlock
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_UNLOCK
+_GL_WARN_ON_USE (pthread_rwlock_unlock, "pthread_rwlock_unlock is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_RWLOCK@
+# if @REPLACE_PTHREAD_RWLOCK_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_rwlock_destroy
+#   define pthread_rwlock_destroy rpl_pthread_rwlock_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_rwlock_destroy, int, (pthread_rwlock_t *lock)
+                                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_rwlock_destroy, int, (pthread_rwlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_RWLOCK_DESTROY@
+_GL_FUNCDECL_SYS (pthread_rwlock_destroy, int, (pthread_rwlock_t *lock)
+                                               _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_rwlock_destroy, int, (pthread_rwlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_rwlock_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_rwlock_destroy
+# if HAVE_RAW_DECL_PTHREAD_RWLOCK_DESTROY
+_GL_WARN_ON_USE (pthread_rwlock_destroy, "pthread_rwlock_destroy is not portable - "
+                 "use gnulib module pthread-rwlock for portability");
+# endif
+#endif
+
+/* =========== Condition variable functions =========== */
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_init
+#   define pthread_cond_init rpl_pthread_cond_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_init, int,
+                  (pthread_cond_t *restrict cond,
+                   const pthread_condattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_cond_init, int,
+                  (pthread_cond_t *restrict cond,
+                   const pthread_condattr_t *restrict attr));
+# else
+#  if !@HAVE_PTHREAD_COND_INIT@
+_GL_FUNCDECL_SYS (pthread_cond_init, int,
+                  (pthread_cond_t *restrict cond,
+                   const pthread_condattr_t *restrict attr)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_init, int,
+                  (pthread_cond_t *restrict cond,
+                   const pthread_condattr_t *restrict attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_init
+# if HAVE_RAW_DECL_PTHREAD_COND_INIT
+_GL_WARN_ON_USE (pthread_cond_init, "pthread_cond_init is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_CONDATTR_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_condattr_init
+#   define pthread_condattr_init rpl_pthread_condattr_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_condattr_init, int, (pthread_condattr_t *attr)
+                                              _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_condattr_init, int, (pthread_condattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_CONDATTR_INIT@
+_GL_FUNCDECL_SYS (pthread_condattr_init, int, (pthread_condattr_t *attr)
+                                              _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_condattr_init, int, (pthread_condattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_condattr_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_condattr_init
+# if HAVE_RAW_DECL_PTHREAD_CONDATTR_INIT
+_GL_WARN_ON_USE (pthread_condattr_init, "pthread_condattr_init is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_CONDATTR_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_condattr_destroy
+#   define pthread_condattr_destroy rpl_pthread_condattr_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_condattr_destroy, int, (pthread_condattr_t *attr)
+                                                 _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_condattr_destroy, int, (pthread_condattr_t *attr));
+# else
+#  if !@HAVE_PTHREAD_CONDATTR_DESTROY@
+_GL_FUNCDECL_SYS (pthread_condattr_destroy, int, (pthread_condattr_t *attr)
+                                                 _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_condattr_destroy, int, (pthread_condattr_t *attr));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_condattr_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_condattr_destroy
+# if HAVE_RAW_DECL_PTHREAD_CONDATTR_DESTROY
+_GL_WARN_ON_USE (pthread_condattr_destroy, "pthread_condattr_destroy is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_WAIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_wait
+#   define pthread_cond_wait rpl_pthread_cond_wait
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_wait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex)
+                  _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (pthread_cond_wait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex));
+# else
+#  if !@HAVE_PTHREAD_COND_WAIT@
+_GL_FUNCDECL_SYS (pthread_cond_wait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex)
+                  _GL_ARG_NONNULL ((1, 2)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_wait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_wait);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_wait
+# if HAVE_RAW_DECL_PTHREAD_COND_WAIT
+_GL_WARN_ON_USE (pthread_cond_wait, "pthread_cond_wait is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_TIMEDWAIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_timedwait
+#   define pthread_cond_timedwait rpl_pthread_cond_timedwait
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_timedwait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+_GL_CXXALIAS_RPL (pthread_cond_timedwait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime));
+# else
+#  if !@HAVE_PTHREAD_COND_TIMEDWAIT@
+_GL_FUNCDECL_SYS (pthread_cond_timedwait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime)
+                  _GL_ARG_NONNULL ((1, 2, 3)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_timedwait, int,
+                  (pthread_cond_t *restrict cond,
+                   pthread_mutex_t *restrict mutex,
+                   const struct timespec *restrict abstime));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_timedwait);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_timedwait
+# if HAVE_RAW_DECL_PTHREAD_COND_TIMEDWAIT
+_GL_WARN_ON_USE (pthread_cond_timedwait, "pthread_cond_timedwait is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_SIGNAL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_signal
+#   define pthread_cond_signal rpl_pthread_cond_signal
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_signal, int, (pthread_cond_t *cond)
+                                            _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_cond_signal, int, (pthread_cond_t *cond));
+# else
+#  if !@HAVE_PTHREAD_COND_SIGNAL@
+_GL_FUNCDECL_SYS (pthread_cond_signal, int, (pthread_cond_t *cond)
+                                            _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_signal, int, (pthread_cond_t *cond));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_signal);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_signal
+# if HAVE_RAW_DECL_PTHREAD_COND_SIGNAL
+_GL_WARN_ON_USE (pthread_cond_signal, "pthread_cond_signal is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_BROADCAST@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_broadcast
+#   define pthread_cond_broadcast rpl_pthread_cond_broadcast
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_broadcast, int, (pthread_cond_t *cond)
+                                               _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_cond_broadcast, int, (pthread_cond_t *cond));
+# else
+#  if !@HAVE_PTHREAD_COND_BROADCAST@
+_GL_FUNCDECL_SYS (pthread_cond_broadcast, int, (pthread_cond_t *cond)
+                                               _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_broadcast, int, (pthread_cond_t *cond));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_broadcast);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_broadcast
+# if HAVE_RAW_DECL_PTHREAD_COND_BROADCAST
+_GL_WARN_ON_USE (pthread_cond_broadcast, "pthread_cond_broadcast is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_COND@
+# if @REPLACE_PTHREAD_COND_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_cond_destroy
+#   define pthread_cond_destroy rpl_pthread_cond_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_cond_destroy, int, (pthread_cond_t *cond)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_cond_destroy, int, (pthread_cond_t *cond));
+# else
+#  if !@HAVE_PTHREAD_COND_DESTROY@
+_GL_FUNCDECL_SYS (pthread_cond_destroy, int, (pthread_cond_t *cond)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_cond_destroy, int, (pthread_cond_t *cond));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_cond_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_cond_destroy
+# if HAVE_RAW_DECL_PTHREAD_COND_DESTROY
+_GL_WARN_ON_USE (pthread_cond_destroy, "pthread_cond_destroy is not portable - "
+                 "use gnulib module pthread-cond for portability");
+# endif
+#endif
+
+/* =========== Thread-specific storage functions =========== */
+
+#if @GNULIB_PTHREAD_TSS@
+# if @REPLACE_PTHREAD_KEY_CREATE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_key_create
+#   define pthread_key_create rpl_pthread_key_create
+#  endif
+_GL_FUNCDECL_RPL (pthread_key_create, int,
+                  (pthread_key_t *keyp, void (*destructor) (void *))
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_key_create, int,
+                  (pthread_key_t *keyp, void (*destructor) (void *)));
+# else
+#  if !@HAVE_PTHREAD_KEY_CREATE@
+_GL_FUNCDECL_SYS (pthread_key_create, int,
+                  (pthread_key_t *keyp, void (*destructor) (void *))
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS_CAST (pthread_key_create, int,
+                       (pthread_key_t *keyp, void (*destructor) (void *)));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_key_create);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_key_create
+# if HAVE_RAW_DECL_PTHREAD_KEY_CREATE
+_GL_WARN_ON_USE (pthread_key_create, "pthread_key_create is not portable - "
+                 "use gnulib module pthread-tss for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_TSS@
+# if @REPLACE_PTHREAD_SETSPECIFIC@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_setspecific
+#   define pthread_setspecific rpl_pthread_setspecific
+#  endif
+_GL_FUNCDECL_RPL (pthread_setspecific, int,
+                  (pthread_key_t key, const void *value));
+_GL_CXXALIAS_RPL (pthread_setspecific, int,
+                  (pthread_key_t key, const void *value));
+# else
+#  if !@HAVE_PTHREAD_SETSPECIFIC@
+_GL_FUNCDECL_SYS (pthread_setspecific, int,
+                  (pthread_key_t key, const void *value));
+#  endif
+_GL_CXXALIAS_SYS (pthread_setspecific, int,
+                  (pthread_key_t key, const void *value));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_setspecific);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_setspecific
+# if HAVE_RAW_DECL_PTHREAD_SETSPECIFIC
+_GL_WARN_ON_USE (pthread_setspecific, "pthread_setspecific is not portable - "
+                 "use gnulib module pthread-tss for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_TSS@
+# if @REPLACE_PTHREAD_GETSPECIFIC@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_getspecific
+#   define pthread_getspecific rpl_pthread_getspecific
+#  endif
+_GL_FUNCDECL_RPL (pthread_getspecific, void *, (pthread_key_t key));
+_GL_CXXALIAS_RPL (pthread_getspecific, void *, (pthread_key_t key));
+# else
+#  if !@HAVE_PTHREAD_GETSPECIFIC@
+_GL_FUNCDECL_SYS (pthread_getspecific, void *, (pthread_key_t key));
+#  endif
+_GL_CXXALIAS_SYS (pthread_getspecific, void *, (pthread_key_t key));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_getspecific);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_getspecific
+# if HAVE_RAW_DECL_PTHREAD_GETSPECIFIC
+_GL_WARN_ON_USE (pthread_getspecific, "pthread_getspecific is not portable - "
+                 "use gnulib module pthread-tss for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_TSS@
+# if @REPLACE_PTHREAD_KEY_DELETE@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_key_delete
+#   define pthread_key_delete rpl_pthread_key_delete
+#  endif
+_GL_FUNCDECL_RPL (pthread_key_delete, int, (pthread_key_t key));
+_GL_CXXALIAS_RPL (pthread_key_delete, int, (pthread_key_t key));
+# else
+#  if !@HAVE_PTHREAD_KEY_DELETE@
+_GL_FUNCDECL_SYS (pthread_key_delete, int, (pthread_key_t key));
+#  endif
+_GL_CXXALIAS_SYS (pthread_key_delete, int, (pthread_key_t key));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_key_delete);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_key_delete
+# if HAVE_RAW_DECL_PTHREAD_KEY_DELETE
+_GL_WARN_ON_USE (pthread_key_delete, "pthread_key_delete is not portable - "
+                 "use gnulib module pthread-tss for portability");
+# endif
+#endif
+
+/* =========== Spinlock functions =========== */
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_INIT@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_init
+#   define pthread_spin_init rpl_pthread_spin_init
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_init, int,
+                  (pthread_spinlock_t *lock, int shared_across_processes)
+                  _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_init, int,
+                  (pthread_spinlock_t *lock, int shared_across_processes));
+# else
+#  if !@HAVE_PTHREAD_SPIN_INIT@
+_GL_FUNCDECL_SYS (pthread_spin_init, int,
+                  (pthread_spinlock_t *lock, int shared_across_processes)
+                  _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_init, int,
+                  (pthread_spinlock_t *lock, int shared_across_processes));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_init);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_init
+# if HAVE_RAW_DECL_PTHREAD_SPIN_INIT
+_GL_WARN_ON_USE (pthread_spin_init, "pthread_spin_init is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_LOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_lock
+#   define pthread_spin_lock rpl_pthread_spin_lock
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_lock, int, (pthread_spinlock_t *lock)
+                                          _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_lock, int, (pthread_spinlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_SPIN_LOCK@
+_GL_FUNCDECL_SYS (pthread_spin_lock, int, (pthread_spinlock_t *lock)
+                                          _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_lock, int, (pthread_spinlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_lock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_lock
+# if HAVE_RAW_DECL_PTHREAD_SPIN_LOCK
+_GL_WARN_ON_USE (pthread_spin_lock, "pthread_spin_lock is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_TRYLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_trylock
+#   define pthread_spin_trylock rpl_pthread_spin_trylock
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_trylock, int, (pthread_spinlock_t *lock)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_trylock, int, (pthread_spinlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_SPIN_TRYLOCK@
+_GL_FUNCDECL_SYS (pthread_spin_trylock, int, (pthread_spinlock_t *lock)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_trylock, int, (pthread_spinlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_trylock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_trylock
+# if HAVE_RAW_DECL_PTHREAD_SPIN_TRYLOCK
+_GL_WARN_ON_USE (pthread_spin_trylock, "pthread_spin_trylock is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_UNLOCK@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_unlock
+#   define pthread_spin_unlock rpl_pthread_spin_unlock
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_unlock, int, (pthread_spinlock_t *lock)
+                                            _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_unlock, int, (pthread_spinlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_SPIN_UNLOCK@
+_GL_FUNCDECL_SYS (pthread_spin_unlock, int, (pthread_spinlock_t *lock)
+                                            _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_unlock, int, (pthread_spinlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_unlock);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_unlock
+# if HAVE_RAW_DECL_PTHREAD_SPIN_UNLOCK
+_GL_WARN_ON_USE (pthread_spin_unlock, "pthread_spin_unlock is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+#if @GNULIB_PTHREAD_SPIN@
+# if @REPLACE_PTHREAD_SPIN_DESTROY@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef pthread_spin_destroy
+#   define pthread_spin_destroy rpl_pthread_spin_destroy
+#  endif
+_GL_FUNCDECL_RPL (pthread_spin_destroy, int, (pthread_spinlock_t *lock)
+                                             _GL_ARG_NONNULL ((1)));
+_GL_CXXALIAS_RPL (pthread_spin_destroy, int, (pthread_spinlock_t *lock));
+# else
+#  if !@HAVE_PTHREAD_SPIN_DESTROY@
+_GL_FUNCDECL_SYS (pthread_spin_destroy, int, (pthread_spinlock_t *lock)
+                                             _GL_ARG_NONNULL ((1)));
+#  endif
+_GL_CXXALIAS_SYS (pthread_spin_destroy, int, (pthread_spinlock_t *lock));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (pthread_spin_destroy);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pthread_spin_destroy
+# if HAVE_RAW_DECL_PTHREAD_SPIN_DESTROY
+_GL_WARN_ON_USE (pthread_spin_destroy, "pthread_spin_destroy is not portable - "
+                 "use gnulib module pthread-spin for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_PTHREAD_H_ */
+#endif /* _@GUARD_PREFIX@_PTHREAD_H_ */
+#endif
diff --git a/src/gl/tests/pthread_sigmask.c b/src/gl/tests/pthread_sigmask.c
new file mode 100644
index 0000000..8a69204
--- /dev/null
+++ b/src/gl/tests/pthread_sigmask.c
@@ -0,0 +1,92 @@
+/* POSIX compatible signal blocking for threads.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <signal.h>
+
+#include <errno.h>
+#include <stddef.h>
+
+#if PTHREAD_SIGMASK_INEFFECTIVE
+# include <string.h>
+#endif
+
+#if PTHREAD_SIGMASK_UNBLOCK_BUG
+# include <unistd.h>
+#endif
+
+int
+pthread_sigmask (int how, const sigset_t *new_mask, sigset_t *old_mask)
+#undef pthread_sigmask
+{
+#if HAVE_PTHREAD_SIGMASK
+  int ret;
+
+# if PTHREAD_SIGMASK_INEFFECTIVE
+  sigset_t omask, omask_copy;
+  sigset_t *old_mask_ptr = &omask;
+  sigemptyset (&omask);
+  /* Add a signal unlikely to be blocked, so that OMASK_COPY
+     is unlikely to match the actual mask.  */
+  sigaddset (&omask, SIGILL);
+  memcpy (&omask_copy, &omask, sizeof omask);
+# else
+  sigset_t *old_mask_ptr = old_mask;
+# endif
+
+  ret = pthread_sigmask (how, new_mask, old_mask_ptr);
+
+# if PTHREAD_SIGMASK_INEFFECTIVE
+  if (ret == 0)
+    {
+      /* Detect whether pthread_sigmask is currently ineffective.
+         Don't cache the information: libpthread.so could be dynamically
+         loaded after the program started and after pthread_sigmask was
+         called for the first time.  */
+      if (memcmp (&omask_copy, &omask, sizeof omask) == 0
+          && pthread_sigmask (1729, &omask_copy, NULL) == 0)
+        {
+          /* pthread_sigmask is currently ineffective.  The program is not
+             linked to -lpthread.  So use sigprocmask instead.  */
+          return (sigprocmask (how, new_mask, old_mask) < 0 ? errno : 0);
+        }
+
+      if (old_mask)
+        memcpy (old_mask, &omask, sizeof omask);
+    }
+# endif
+# if PTHREAD_SIGMASK_FAILS_WITH_ERRNO
+  if (ret == -1)
+    return errno;
+# endif
+# if PTHREAD_SIGMASK_UNBLOCK_BUG
+  if (ret == 0
+      && new_mask != NULL
+      && (how == SIG_UNBLOCK || how == SIG_SETMASK))
+    {
+      /* Give the OS the opportunity to raise signals that were pending before
+         the pthread_sigmask call and have now been unblocked.  */
+      usleep (1);
+    }
+# endif
+  return ret;
+#else
+  int ret = sigprocmask (how, new_mask, old_mask);
+  return (ret < 0 ? errno : 0);
+#endif
+}
diff --git a/src/gl/tests/putenv.c b/src/gl/tests/putenv.c
new file mode 100644
index 0000000..555474f
--- /dev/null
+++ b/src/gl/tests/putenv.c
@@ -0,0 +1,196 @@
+/* Copyright (C) 1991, 1994, 1997-1998, 2000, 2003-2021 Free Software
+   Foundation, Inc.
+
+   NOTE: The canonical source of this file is maintained with the GNU C
+   Library.  Bugs can be reported to bug-glibc@prep.ai.mit.edu.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 3 of the License, or any
+   later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <stddef.h>
+
+/* Include errno.h *after* sys/types.h to work around header problems
+   on AIX 3.2.5.  */
+#include <errno.h>
+#ifndef __set_errno
+# define __set_errno(ev) ((errno) = (ev))
+#endif
+
+#include <string.h>
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+#endif
+
+#if _LIBC
+# if HAVE_GNU_LD
+#  define environ __environ
+# else
+extern char **environ;
+# endif
+#endif
+
+#if _LIBC
+/* This lock protects against simultaneous modifications of 'environ'.  */
+# include <bits/libc-lock.h>
+__libc_lock_define_initialized (static, envlock)
+# define LOCK   __libc_lock_lock (envlock)
+# define UNLOCK __libc_lock_unlock (envlock)
+#else
+# define LOCK
+# define UNLOCK
+#endif
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Don't assume that UNICODE is not defined.  */
+# undef SetEnvironmentVariable
+# define SetEnvironmentVariable SetEnvironmentVariableA
+#endif
+
+static int
+_unsetenv (const char *name)
+{
+  size_t len;
+#if !HAVE_DECL__PUTENV
+  char **ep;
+#endif
+
+  if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  len = strlen (name);
+
+#if HAVE_DECL__PUTENV
+  {
+    int putenv_result;
+    char *name_ = malloc (len + 2);
+    memcpy (name_, name, len);
+    name_[len] = '=';
+    name_[len + 1] = 0;
+    putenv_result = _putenv (name_);
+    free (name_);
+    return putenv_result;
+  }
+#else
+
+  LOCK;
+
+  ep = environ;
+  while (*ep != NULL)
+    if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
+      {
+        /* Found it.  Remove this pointer by moving later ones back.  */
+        char **dp = ep;
+
+        do
+          dp[0] = dp[1];
+        while (*dp++);
+        /* Continue the loop in case NAME appears again.  */
+      }
+    else
+      ++ep;
+
+  UNLOCK;
+
+  return 0;
+#endif
+}
+
+
+/* Put STRING, which is of the form "NAME=VALUE", in the environment.
+   If STRING contains no '=', then remove STRING from the environment.  */
+int
+putenv (char *string)
+{
+  const char *name_end = strchr (string, '=');
+  char **ep;
+
+  if (name_end == NULL)
+    {
+      /* Remove the variable from the environment.  */
+      return _unsetenv (string);
+    }
+
+#if HAVE_DECL__PUTENV
+  /* Rely on _putenv to allocate the new environment.  If other
+     parts of the application use _putenv, the !HAVE_DECL__PUTENV code
+     would fight over who owns the environ vector, causing a crash.  */
+  if (name_end[1])
+    return _putenv (string);
+  else
+    {
+      /* _putenv ("NAME=") unsets NAME, so invoke _putenv ("NAME= ")
+         to allocate the environ vector and then replace the new
+         entry with "NAME=".  */
+      int putenv_result;
+      char *name_x = malloc (name_end - string + sizeof "= ");
+      if (!name_x)
+        return -1;
+      memcpy (name_x, string, name_end - string + 1);
+      name_x[name_end - string + 1] = ' ';
+      name_x[name_end - string + 2] = 0;
+      putenv_result = _putenv (name_x);
+      for (ep = environ; *ep; ep++)
+        if (strcmp (*ep, name_x) == 0)
+          {
+            *ep = string;
+            break;
+          }
+# if defined _WIN32 && ! defined __CYGWIN__
+      if (putenv_result == 0)
+        {
+          /* _putenv propagated "NAME= " into the subprocess environment;
+             fix that by calling SetEnvironmentVariable directly.  */
+          name_x[name_end - string] = 0;
+          putenv_result = SetEnvironmentVariable (name_x, "") ? 0 : -1;
+          errno = ENOMEM; /* ENOMEM is the only way to fail.  */
+        }
+# endif
+      free (name_x);
+      return putenv_result;
+    }
+#else
+  for (ep = environ; *ep; ep++)
+    if (strncmp (*ep, string, name_end - string) == 0
+        && (*ep)[name_end - string] == '=')
+      break;
+
+  if (*ep)
+    *ep = string;
+  else
+    {
+      static char **last_environ = NULL;
+      size_t size = ep - environ;
+      char **new_environ = malloc ((size + 2) * sizeof *new_environ);
+      if (! new_environ)
+        return -1;
+      new_environ[0] = string;
+      memcpy (new_environ + 1, environ, (size + 1) * sizeof *new_environ);
+      free (last_environ);
+      last_environ = new_environ;
+      environ = new_environ;
+    }
+
+  return 0;
+#endif
+}
diff --git a/src/gl/tests/raise.c b/src/gl/tests/raise.c
new file mode 100644
index 0000000..e1dda1d
--- /dev/null
+++ b/src/gl/tests/raise.c
@@ -0,0 +1,83 @@
+/* Provide a non-threads replacement for the POSIX raise function.
+
+   Copyright (C) 2002-2003, 2005-2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* written by Jim Meyering and Bruno Haible */
+
+#include <config.h>
+
+/* Specification.  */
+#include <signal.h>
+
+#if HAVE_RAISE
+/* Native Windows platform.  */
+
+# include <errno.h>
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+#  include "msvc-inval.h"
+# endif
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+/* Forward declaration.  */
+static int raise_nothrow (int sig);
+# else
+#  define raise_nothrow raise
+# endif
+
+#else
+/* An old Unix platform.  */
+
+# include <unistd.h>
+
+#endif
+
+int
+raise (int sig)
+#undef raise
+{
+#if GNULIB_defined_signal_blocking && GNULIB_defined_SIGPIPE
+  if (sig == SIGPIPE)
+    return _gl_raise_SIGPIPE ();
+#endif
+
+#if HAVE_RAISE
+  return raise_nothrow (sig);
+#else
+  return kill (getpid (), sig);
+#endif
+}
+
+#if HAVE_RAISE && HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static int
+raise_nothrow (int sig)
+{
+  int result;
+
+  TRY_MSVC_INVAL
+    {
+      result = raise (sig);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = -1;
+      errno = EINVAL;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+#endif
diff --git a/src/gl/tests/same-inode.h b/src/gl/tests/same-inode.h
new file mode 100644
index 0000000..cf1c96e
--- /dev/null
+++ b/src/gl/tests/same-inode.h
@@ -0,0 +1,47 @@
+/* Determine whether two stat buffers are known to refer to the same file.
+
+   Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef SAME_INODE_H
+# define SAME_INODE_H 1
+
+# include <sys/types.h>
+
+# if defined __VMS && __CRTL_VER < 80200000
+#  define SAME_INODE(a, b)             \
+    ((a).st_ino[0] == (b).st_ino[0]    \
+     && (a).st_ino[1] == (b).st_ino[1] \
+     && (a).st_ino[2] == (b).st_ino[2] \
+     && (a).st_dev == (b).st_dev)
+# elif defined _WIN32 && ! defined __CYGWIN__
+   /* Native Windows.  */
+#  if _GL_WINDOWS_STAT_INODES
+    /* stat() and fstat() set st_dev and st_ino to 0 if information about
+       the inode is not available.  */
+#   define SAME_INODE(a, b) \
+     (!((a).st_ino == 0 && (a).st_dev == 0) \
+      && (a).st_ino == (b).st_ino && (a).st_dev == (b).st_dev)
+#  else
+    /* stat() and fstat() set st_ino to 0 always.  */
+#   define SAME_INODE(a, b) 0
+#  endif
+# else
+#  define SAME_INODE(a, b)    \
+    ((a).st_ino == (b).st_ino \
+     && (a).st_dev == (b).st_dev)
+# endif
+
+#endif
diff --git a/src/gl/tests/sched.in.h b/src/gl/tests/sched.in.h
new file mode 100644
index 0000000..dfa29c7
--- /dev/null
+++ b/src/gl/tests/sched.in.h
@@ -0,0 +1,99 @@
+/* A GNU-like <sched.h>.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_SCHED_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_SCHED_H@
+# if @HAVE_SYS_CDEFS_H@
+#  include <sys/cdefs.h>
+# endif
+# @INCLUDE_NEXT@ @NEXT_SCHED_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_SCHED_H
+#define _@GUARD_PREFIX@_SCHED_H
+
+/* Get pid_t.
+   This is needed on glibc 2.11 (see
+   glibc bug <https://sourceware.org/bugzilla/show_bug.cgi?id=13198>)
+   and Mac OS X 10.5.  */
+#include <sys/types.h>
+
+#ifdef __KLIBC__
+/* On OS/2 kLIBC, struct sched_param is in spawn.h.  */
+# include <spawn.h>
+#endif
+
+#ifdef __VMS
+/* On OpenVMS, struct sched_param is in <pthread.h>.  */
+# include <pthread.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+#if !@HAVE_STRUCT_SCHED_PARAM@
+
+# if !GNULIB_defined_struct_sched_param
+struct sched_param
+{
+  int sched_priority;
+};
+#  define GNULIB_defined_struct_sched_param 1
+# endif
+
+#endif
+
+#if !(defined SCHED_FIFO && defined SCHED_RR && defined SCHED_OTHER)
+# define SCHED_FIFO   1
+# define SCHED_RR     2
+# define SCHED_OTHER  0
+#endif
+
+#if @GNULIB_SCHED_YIELD@
+# if @REPLACE_SCHED_YIELD@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef sched_yield
+#   define sched_yield rpl_sched_yield
+#  endif
+_GL_FUNCDECL_RPL (sched_yield, int, (void));
+_GL_CXXALIAS_RPL (sched_yield, int, (void));
+# else
+#  if !@HAVE_SCHED_YIELD@
+_GL_FUNCDECL_SYS (sched_yield, int, (void));
+#  endif
+_GL_CXXALIAS_SYS (sched_yield, int, (void));
+# endif
+# if __GLIBC__ >= 2
+_GL_CXXALIASWARN (sched_yield);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef sched_yield
+# if HAVE_RAW_DECL_SCHED_YIELD
+_GL_WARN_ON_USE (sched_yield, "sched_yield is not portable - "
+                 "use gnulib module sched_yield for portability");
+# endif
+#endif
+
+#endif /* _@GUARD_PREFIX@_SCHED_H */
+#endif /* _@GUARD_PREFIX@_SCHED_H */
diff --git a/src/gl/tests/sched_yield.c b/src/gl/tests/sched_yield.c
new file mode 100644
index 0000000..ae0e936
--- /dev/null
+++ b/src/gl/tests/sched_yield.c
@@ -0,0 +1,59 @@
+/* Schedule other threads to run.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <sched.h>
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+/* Use Windows threads.  */
+
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+
+int
+sched_yield (void)
+{
+  Sleep (0);
+  return 0;
+}
+
+#elif defined __KLIBC__
+/* OS/2 kLIBC implementation */
+
+# define INCL_DOS
+# include <os2.h>
+
+int
+sched_yield (void)
+{
+  DosSleep (0);
+  return 0;
+}
+
+#else
+/* Provide a dummy implementation for single-threaded applications.  */
+
+int
+sched_yield (void)
+{
+  return 0;
+}
+
+#endif
diff --git a/src/gl/tests/setlocale-lock.c b/src/gl/tests/setlocale-lock.c
new file mode 100644
index 0000000..5474ae0
--- /dev/null
+++ b/src/gl/tests/setlocale-lock.c
@@ -0,0 +1,150 @@
+/* Return the internal lock used by setlocale_null_r.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* When it is known that the gl_get_setlocale_null_lock function is defined
+   by a dependency library, it should not be defined here.  */
+#if OMIT_SETLOCALE_LOCK
+
+/* This declaration is solely to ensure that after preprocessing
+   this file is never empty.  */
+typedef int dummy;
+
+#else
+
+/* This file defines the internal lock used by setlocale_null_r.
+   It is a separate compilation unit, so that only one copy of it is
+   present when linking statically.  */
+
+/* Prohibit renaming this symbol.  */
+# undef gl_get_setlocale_null_lock
+
+/* Macro for exporting a symbol (function, not variable) defined in this file,
+   when compiled into a shared library.  */
+# ifndef DLL_EXPORTED
+#  if HAVE_VISIBILITY
+  /* Override the effect of the compiler option '-fvisibility=hidden'.  */
+#   define DLL_EXPORTED __attribute__((__visibility__("default")))
+#  elif defined _WIN32 || defined __CYGWIN__
+#   define DLL_EXPORTED __declspec(dllexport)
+#  else
+#   define DLL_EXPORTED
+#  endif
+# endif
+
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+#  include "windows-initguard.h"
+
+/* The return type is a 'CRITICAL_SECTION *', not a 'glwthread_mutex_t *',
+   because the latter is not guaranteed to be a stable ABI in the future.  */
+
+/* Make sure the function gets exported from DLLs.  */
+DLL_EXPORTED CRITICAL_SECTION *gl_get_setlocale_null_lock (void);
+
+static glwthread_initguard_t guard = GLWTHREAD_INITGUARD_INIT;
+static CRITICAL_SECTION lock;
+
+/* Returns the internal lock used by setlocale_null_r.  */
+CRITICAL_SECTION *
+gl_get_setlocale_null_lock (void)
+{
+  if (!guard.done)
+    {
+      if (InterlockedIncrement (&guard.started) == 0)
+        {
+          /* This thread is the first one to need the lock.  Initialize it.  */
+          InitializeCriticalSection (&lock);
+          guard.done = 1;
+        }
+      else
+        {
+          /* Don't let guard.started grow and wrap around.  */
+          InterlockedDecrement (&guard.started);
+          /* Yield the CPU while waiting for another thread to finish
+             initializing this mutex.  */
+          while (!guard.done)
+            Sleep (0);
+        }
+    }
+  return &lock;
+}
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED pthread_mutex_t *gl_get_setlocale_null_lock (void);
+
+/* Returns the internal lock used by setlocale_null_r.  */
+pthread_mutex_t *
+gl_get_setlocale_null_lock (void)
+{
+  return &mutex;
+}
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+#  include <stdlib.h>
+
+static int volatile init_needed = 1;
+static once_flag init_once = ONCE_FLAG_INIT;
+static mtx_t mutex;
+
+static void
+atomic_init (void)
+{
+  if (mtx_init (&mutex, mtx_plain) != thrd_success)
+    abort ();
+  init_needed = 0;
+}
+
+/* Make sure the function gets exported from shared libraries.  */
+DLL_EXPORTED mtx_t *gl_get_setlocale_null_lock (void);
+
+/* Returns the internal lock used by setlocale_null_r.  */
+mtx_t *
+gl_get_setlocale_null_lock (void)
+{
+  if (init_needed)
+    call_once (&init_once, atomic_init);
+  return &mutex;
+}
+
+# endif
+
+# if (defined _WIN32 || defined __CYGWIN__) && !defined _MSC_VER
+/* Make sure the '__declspec(dllimport)' in setlocale_null.c does not cause
+   a link failure when no DLLs are involved.  */
+#  if defined _WIN64 || defined _LP64
+#   define IMP(x) __imp_##x
+#  else
+#   define IMP(x) _imp__##x
+#  endif
+void * IMP(gl_get_setlocale_null_lock) = &gl_get_setlocale_null_lock;
+# endif
+
+#endif
diff --git a/src/gl/tests/setlocale.c b/src/gl/tests/setlocale.c
new file mode 100644
index 0000000..0479ee5
--- /dev/null
+++ b/src/gl/tests/setlocale.c
@@ -0,0 +1,1673 @@
+/* Set the current locale.  -*- coding: utf-8 -*-
+   Copyright (C) 2009, 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+/* Override setlocale() so that when the default locale is requested
+   (locale = ""), the environment variables LC_ALL, LC_*, and LANG are
+   considered.
+   Also include all the functionality from libintl's setlocale() override.  */
+
+/* Please keep this file in sync with
+   gettext/gettext-runtime/intl/setlocale.c !  */
+
+/* Specification.  */
+#include <locale.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "localename.h"
+
+#if HAVE_CFLOCALECOPYPREFERREDLANGUAGES || HAVE_CFPREFERENCESCOPYAPPVALUE
+# if HAVE_CFLOCALECOPYPREFERREDLANGUAGES
+#  include <CoreFoundation/CFLocale.h>
+# elif HAVE_CFPREFERENCESCOPYAPPVALUE
+#  include <CoreFoundation/CFPreferences.h>
+# endif
+# include <CoreFoundation/CFPropertyList.h>
+# include <CoreFoundation/CFArray.h>
+# include <CoreFoundation/CFString.h>
+extern void gl_locale_name_canonicalize (char *name);
+#endif
+
+#if 1
+
+# undef setlocale
+
+/* Which of the replacements to activate?  */
+# if NEED_SETLOCALE_IMPROVED
+#  define setlocale_improved rpl_setlocale
+# elif NEED_SETLOCALE_MTSAFE
+#  define setlocale_mtsafe rpl_setlocale
+# else
+#  error "This file should only be compiled if NEED_SETLOCALE_IMPROVED || NEED_SETLOCALE_MTSAFE."
+# endif
+
+/* Like setlocale, but guaranteed to be multithread-safe if LOCALE == NULL.  */
+# if !SETLOCALE_NULL_ALL_MTSAFE || !SETLOCALE_NULL_ONE_MTSAFE /* i.e. if NEED_SETLOCALE_MTSAFE */
+
+#  if NEED_SETLOCALE_IMPROVED
+static
+#  endif
+char *
+setlocale_mtsafe (int category, const char *locale)
+{
+  if (locale == NULL)
+    return (char *) setlocale_null (category);
+  else
+    return setlocale (category, locale);
+}
+# else /* !NEED_SETLOCALE_MTSAFE */
+
+#  define setlocale_mtsafe setlocale
+
+# endif /* NEED_SETLOCALE_MTSAFE */
+
+# if NEED_SETLOCALE_IMPROVED
+
+/* Return string representation of locale category CATEGORY.  */
+static const char *
+category_to_name (int category)
+{
+  const char *retval;
+
+  switch (category)
+  {
+  case LC_COLLATE:
+    retval = "LC_COLLATE";
+    break;
+  case LC_CTYPE:
+    retval = "LC_CTYPE";
+    break;
+  case LC_MONETARY:
+    retval = "LC_MONETARY";
+    break;
+  case LC_NUMERIC:
+    retval = "LC_NUMERIC";
+    break;
+  case LC_TIME:
+    retval = "LC_TIME";
+    break;
+  case LC_MESSAGES:
+    retval = "LC_MESSAGES";
+    break;
+  default:
+    /* If you have a better idea for a default value let me know.  */
+    retval = "LC_XXX";
+  }
+
+  return retval;
+}
+
+#  if defined _WIN32 && ! defined __CYGWIN__
+
+/* The native Windows setlocale() function expects locale names of the form
+   "German" or "German_Germany" or "DEU", but not "de" or "de_DE".  We need
+   to convert the names from the form with ISO 639 language code and ISO 3166
+   country code to the form with English names or with three-letter identifier.
+   The three-letter identifiers known by a Windows XP SP2 or SP3 are:
+     AFK  Afrikaans_South Africa.1252
+     ARA  Arabic_Saudi Arabia.1256
+     ARB  Arabic_Lebanon.1256
+     ARE  Arabic_Egypt.1256
+     ARG  Arabic_Algeria.1256
+     ARH  Arabic_Bahrain.1256
+     ARI  Arabic_Iraq.1256
+     ARJ  Arabic_Jordan.1256
+     ARK  Arabic_Kuwait.1256
+     ARL  Arabic_Libya.1256
+     ARM  Arabic_Morocco.1256
+     ARO  Arabic_Oman.1256
+     ARQ  Arabic_Qatar.1256
+     ARS  Arabic_Syria.1256
+     ART  Arabic_Tunisia.1256
+     ARU  Arabic_U.A.E..1256
+     ARY  Arabic_Yemen.1256
+     AZE  Azeri (Latin)_Azerbaijan.1254
+     BEL  Belarusian_Belarus.1251
+     BGR  Bulgarian_Bulgaria.1251
+     BSB  Bosnian_Bosnia and Herzegovina.1250
+     BSC  Bosnian (Cyrillic)_Bosnia and Herzegovina.1250  (wrong encoding!)
+     CAT  Catalan_Spain.1252
+     CHH  Chinese_Hong Kong S.A.R..950
+     CHI  Chinese_Singapore.936
+     CHS  Chinese_People's Republic of China.936
+     CHT  Chinese_Taiwan.950
+     CSY  Czech_Czech Republic.1250
+     CYM  Welsh_United Kingdom.1252
+     DAN  Danish_Denmark.1252
+     DEA  German_Austria.1252
+     DEC  German_Liechtenstein.1252
+     DEL  German_Luxembourg.1252
+     DES  German_Switzerland.1252
+     DEU  German_Germany.1252
+     ELL  Greek_Greece.1253
+     ENA  English_Australia.1252
+     ENB  English_Caribbean.1252
+     ENC  English_Canada.1252
+     ENG  English_United Kingdom.1252
+     ENI  English_Ireland.1252
+     ENJ  English_Jamaica.1252
+     ENL  English_Belize.1252
+     ENP  English_Republic of the Philippines.1252
+     ENS  English_South Africa.1252
+     ENT  English_Trinidad and Tobago.1252
+     ENU  English_United States.1252
+     ENW  English_Zimbabwe.1252
+     ENZ  English_New Zealand.1252
+     ESA  Spanish_Panama.1252
+     ESB  Spanish_Bolivia.1252
+     ESC  Spanish_Costa Rica.1252
+     ESD  Spanish_Dominican Republic.1252
+     ESE  Spanish_El Salvador.1252
+     ESF  Spanish_Ecuador.1252
+     ESG  Spanish_Guatemala.1252
+     ESH  Spanish_Honduras.1252
+     ESI  Spanish_Nicaragua.1252
+     ESL  Spanish_Chile.1252
+     ESM  Spanish_Mexico.1252
+     ESN  Spanish_Spain.1252
+     ESO  Spanish_Colombia.1252
+     ESP  Spanish_Spain.1252
+     ESR  Spanish_Peru.1252
+     ESS  Spanish_Argentina.1252
+     ESU  Spanish_Puerto Rico.1252
+     ESV  Spanish_Venezuela.1252
+     ESY  Spanish_Uruguay.1252
+     ESZ  Spanish_Paraguay.1252
+     ETI  Estonian_Estonia.1257
+     EUQ  Basque_Spain.1252
+     FAR  Farsi_Iran.1256
+     FIN  Finnish_Finland.1252
+     FOS  Faroese_Faroe Islands.1252
+     FPO  Filipino_Philippines.1252
+     FRA  French_France.1252
+     FRB  French_Belgium.1252
+     FRC  French_Canada.1252
+     FRL  French_Luxembourg.1252
+     FRM  French_Principality of Monaco.1252
+     FRS  French_Switzerland.1252
+     FYN  Frisian_Netherlands.1252
+     GLC  Galician_Spain.1252
+     HEB  Hebrew_Israel.1255
+     HRB  Croatian_Bosnia and Herzegovina.1250
+     HRV  Croatian_Croatia.1250
+     HUN  Hungarian_Hungary.1250
+     IND  Indonesian_Indonesia.1252
+     IRE  Irish_Ireland.1252
+     ISL  Icelandic_Iceland.1252
+     ITA  Italian_Italy.1252
+     ITS  Italian_Switzerland.1252
+     IUK  Inuktitut (Latin)_Canada.1252
+     JPN  Japanese_Japan.932
+     KKZ  Kazakh_Kazakhstan.1251
+     KOR  Korean_Korea.949
+     KYR  Kyrgyz_Kyrgyzstan.1251
+     LBX  Luxembourgish_Luxembourg.1252
+     LTH  Lithuanian_Lithuania.1257
+     LVI  Latvian_Latvia.1257
+     MKI  FYRO Macedonian_Former Yugoslav Republic of Macedonia.1251
+     MON  Mongolian_Mongolia.1251
+     MPD  Mapudungun_Chile.1252
+     MSB  Malay_Brunei Darussalam.1252
+     MSL  Malay_Malaysia.1252
+     MWK  Mohawk_Canada.1252
+     NLB  Dutch_Belgium.1252
+     NLD  Dutch_Netherlands.1252
+     NON  Norwegian-Nynorsk_Norway.1252
+     NOR  Norwegian (Bokmål)_Norway.1252
+     NSO  Northern Sotho_South Africa.1252
+     PLK  Polish_Poland.1250
+     PTB  Portuguese_Brazil.1252
+     PTG  Portuguese_Portugal.1252
+     QUB  Quechua_Bolivia.1252
+     QUE  Quechua_Ecuador.1252
+     QUP  Quechua_Peru.1252
+     RMC  Romansh_Switzerland.1252
+     ROM  Romanian_Romania.1250
+     RUS  Russian_Russia.1251
+     SKY  Slovak_Slovakia.1250
+     SLV  Slovenian_Slovenia.1250
+     SMA  Sami (Southern)_Norway.1252
+     SMB  Sami (Southern)_Sweden.1252
+     SME  Sami (Northern)_Norway.1252
+     SMF  Sami (Northern)_Sweden.1252
+     SMG  Sami (Northern)_Finland.1252
+     SMJ  Sami (Lule)_Norway.1252
+     SMK  Sami (Lule)_Sweden.1252
+     SMN  Sami (Inari)_Finland.1252
+     SMS  Sami (Skolt)_Finland.1252
+     SQI  Albanian_Albania.1250
+     SRB  Serbian (Cyrillic)_Serbia and Montenegro.1251
+     SRL  Serbian (Latin)_Serbia and Montenegro.1250
+     SRN  Serbian (Cyrillic)_Bosnia and Herzegovina.1251
+     SRS  Serbian (Latin)_Bosnia and Herzegovina.1250
+     SVE  Swedish_Sweden.1252
+     SVF  Swedish_Finland.1252
+     SWK  Swahili_Kenya.1252
+     THA  Thai_Thailand.874
+     TRK  Turkish_Turkey.1254
+     TSN  Tswana_South Africa.1252
+     TTT  Tatar_Russia.1251
+     UKR  Ukrainian_Ukraine.1251
+     URD  Urdu_Islamic Republic of Pakistan.1256
+     USA  English_United States.1252
+     UZB  Uzbek (Latin)_Uzbekistan.1254
+     VIT  Vietnamese_Viet Nam.1258
+     XHO  Xhosa_South Africa.1252
+     ZHH  Chinese_Hong Kong S.A.R..950
+     ZHI  Chinese_Singapore.936
+     ZHM  Chinese_Macau S.A.R..950
+     ZUL  Zulu_South Africa.1252
+ */
+
+/* Table from ISO 639 language code, optionally with country or script suffix,
+   to English name.
+   Keep in sync with the gl_locale_name_from_win32_LANGID function in
+   localename.c!  */
+struct table_entry
+{
+  const char *code;
+  const char *english;
+};
+static const struct table_entry language_table[] =
+  {
+    { "af", "Afrikaans" },
+    { "am", "Amharic" },
+    { "ar", "Arabic" },
+    { "arn", "Mapudungun" },
+    { "as", "Assamese" },
+    { "az@cyrillic", "Azeri (Cyrillic)" },
+    { "az@latin", "Azeri (Latin)" },
+    { "ba", "Bashkir" },
+    { "be", "Belarusian" },
+    { "ber", "Tamazight" },
+    { "ber@arabic", "Tamazight (Arabic)" },
+    { "ber@latin", "Tamazight (Latin)" },
+    { "bg", "Bulgarian" },
+    { "bin", "Edo" },
+    { "bn", "Bengali" },
+    { "bn_BD", "Bengali (Bangladesh)" },
+    { "bn_IN", "Bengali (India)" },
+    { "bnt", "Sutu" },
+    { "bo", "Tibetan" },
+    { "br", "Breton" },
+    { "bs", "BSB" }, /* "Bosnian (Latin)" */
+    { "bs@cyrillic", "BSC" }, /* Bosnian (Cyrillic) */
+    { "ca", "Catalan" },
+    { "chr", "Cherokee" },
+    { "co", "Corsican" },
+    { "cpe", "Hawaiian" },
+    { "cs", "Czech" },
+    { "cy", "Welsh" },
+    { "da", "Danish" },
+    { "de", "German" },
+    { "dsb", "Lower Sorbian" },
+    { "dv", "Divehi" },
+    { "el", "Greek" },
+    { "en", "English" },
+    { "es", "Spanish" },
+    { "et", "Estonian" },
+    { "eu", "Basque" },
+    { "fa", "Farsi" },
+    { "ff", "Fulfulde" },
+    { "fi", "Finnish" },
+    { "fo", "Faroese" }, /* "Faeroese" does not work */
+    { "fr", "French" },
+    { "fy", "Frisian" },
+    { "ga", "IRE" }, /* Gaelic (Ireland) */
+    { "gd", "Gaelic (Scotland)" },
+    { "gd", "Scottish Gaelic" },
+    { "gl", "Galician" },
+    { "gn", "Guarani" },
+    { "gsw", "Alsatian" },
+    { "gu", "Gujarati" },
+    { "ha", "Hausa" },
+    { "he", "Hebrew" },
+    { "hi", "Hindi" },
+    { "hr", "Croatian" },
+    { "hsb", "Upper Sorbian" },
+    { "hu", "Hungarian" },
+    { "hy", "Armenian" },
+    { "id", "Indonesian" },
+    { "ig", "Igbo" },
+    { "ii", "Yi" },
+    { "is", "Icelandic" },
+    { "it", "Italian" },
+    { "iu", "IUK" }, /* Inuktitut */
+    { "ja", "Japanese" },
+    { "ka", "Georgian" },
+    { "kk", "Kazakh" },
+    { "kl", "Greenlandic" },
+    { "km", "Cambodian" },
+    { "km", "Khmer" },
+    { "kn", "Kannada" },
+    { "ko", "Korean" },
+    { "kok", "Konkani" },
+    { "kr", "Kanuri" },
+    { "ks", "Kashmiri" },
+    { "ks_IN", "Kashmiri_India" },
+    { "ks_PK", "Kashmiri (Arabic)_Pakistan" },
+    { "ky", "Kyrgyz" },
+    { "la", "Latin" },
+    { "lb", "Luxembourgish" },
+    { "lo", "Lao" },
+    { "lt", "Lithuanian" },
+    { "lv", "Latvian" },
+    { "mi", "Maori" },
+    { "mk", "FYRO Macedonian" },
+    { "mk", "Macedonian" },
+    { "ml", "Malayalam" },
+    { "mn", "Mongolian" },
+    { "mni", "Manipuri" },
+    { "moh", "Mohawk" },
+    { "mr", "Marathi" },
+    { "ms", "Malay" },
+    { "mt", "Maltese" },
+    { "my", "Burmese" },
+    { "nb", "NOR" }, /* Norwegian Bokmål */
+    { "ne", "Nepali" },
+    { "nic", "Ibibio" },
+    { "nl", "Dutch" },
+    { "nn", "NON" }, /* Norwegian Nynorsk */
+    { "no", "Norwegian" },
+    { "nso", "Northern Sotho" },
+    { "nso", "Sepedi" },
+    { "oc", "Occitan" },
+    { "om", "Oromo" },
+    { "or", "Oriya" },
+    { "pa", "Punjabi" },
+    { "pap", "Papiamentu" },
+    { "pl", "Polish" },
+    { "prs", "Dari" },
+    { "ps", "Pashto" },
+    { "pt", "Portuguese" },
+    { "qu", "Quechua" },
+    { "qut", "K'iche'" },
+    { "rm", "Romansh" },
+    { "ro", "Romanian" },
+    { "ru", "Russian" },
+    { "rw", "Kinyarwanda" },
+    { "sa", "Sanskrit" },
+    { "sah", "Yakut" },
+    { "sd", "Sindhi" },
+    { "se", "Sami (Northern)" },
+    { "se", "Northern Sami" },
+    { "si", "Sinhalese" },
+    { "sk", "Slovak" },
+    { "sl", "Slovenian" },
+    { "sma", "Sami (Southern)" },
+    { "sma", "Southern Sami" },
+    { "smj", "Sami (Lule)" },
+    { "smj", "Lule Sami" },
+    { "smn", "Sami (Inari)" },
+    { "smn", "Inari Sami" },
+    { "sms", "Sami (Skolt)" },
+    { "sms", "Skolt Sami" },
+    { "so", "Somali" },
+    { "sq", "Albanian" },
+    { "sr", "Serbian (Latin)" },
+    { "sr@cyrillic", "SRB" }, /* Serbian (Cyrillic) */
+    { "sv", "Swedish" },
+    { "sw", "Swahili" },
+    { "syr", "Syriac" },
+    { "ta", "Tamil" },
+    { "te", "Telugu" },
+    { "tg", "Tajik" },
+    { "th", "Thai" },
+    { "ti", "Tigrinya" },
+    { "tk", "Turkmen" },
+    { "tl", "Filipino" },
+    { "tn", "Tswana" },
+    { "tr", "Turkish" },
+    { "ts", "Tsonga" },
+    { "tt", "Tatar" },
+    { "ug", "Uighur" },
+    { "uk", "Ukrainian" },
+    { "ur", "Urdu" },
+    { "uz", "Uzbek" },
+    { "uz", "Uzbek (Latin)" },
+    { "uz@cyrillic", "Uzbek (Cyrillic)" },
+    { "ve", "Venda" },
+    { "vi", "Vietnamese" },
+    { "wen", "Sorbian" },
+    { "wo", "Wolof" },
+    { "xh", "Xhosa" },
+    { "yi", "Yiddish" },
+    { "yo", "Yoruba" },
+    { "zh", "Chinese" },
+    { "zu", "Zulu" }
+  };
+
+/* Table from ISO 3166 country code to English name.
+   Keep in sync with the gl_locale_name_from_win32_LANGID function in
+   localename.c!  */
+static const struct table_entry country_table[] =
+  {
+    { "AE", "U.A.E." },
+    { "AF", "Afghanistan" },
+    { "AL", "Albania" },
+    { "AM", "Armenia" },
+    { "AN", "Netherlands Antilles" },
+    { "AR", "Argentina" },
+    { "AT", "Austria" },
+    { "AU", "Australia" },
+    { "AZ", "Azerbaijan" },
+    { "BA", "Bosnia and Herzegovina" },
+    { "BD", "Bangladesh" },
+    { "BE", "Belgium" },
+    { "BG", "Bulgaria" },
+    { "BH", "Bahrain" },
+    { "BN", "Brunei Darussalam" },
+    { "BO", "Bolivia" },
+    { "BR", "Brazil" },
+    { "BT", "Bhutan" },
+    { "BY", "Belarus" },
+    { "BZ", "Belize" },
+    { "CA", "Canada" },
+    { "CG", "Congo" },
+    { "CH", "Switzerland" },
+    { "CI", "Cote d'Ivoire" },
+    { "CL", "Chile" },
+    { "CM", "Cameroon" },
+    { "CN", "People's Republic of China" },
+    { "CO", "Colombia" },
+    { "CR", "Costa Rica" },
+    { "CS", "Serbia and Montenegro" },
+    { "CZ", "Czech Republic" },
+    { "DE", "Germany" },
+    { "DK", "Denmark" },
+    { "DO", "Dominican Republic" },
+    { "DZ", "Algeria" },
+    { "EC", "Ecuador" },
+    { "EE", "Estonia" },
+    { "EG", "Egypt" },
+    { "ER", "Eritrea" },
+    { "ES", "Spain" },
+    { "ET", "Ethiopia" },
+    { "FI", "Finland" },
+    { "FO", "Faroe Islands" },
+    { "FR", "France" },
+    { "GB", "United Kingdom" },
+    { "GD", "Caribbean" },
+    { "GE", "Georgia" },
+    { "GL", "Greenland" },
+    { "GR", "Greece" },
+    { "GT", "Guatemala" },
+    { "HK", "Hong Kong" },
+    { "HK", "Hong Kong S.A.R." },
+    { "HN", "Honduras" },
+    { "HR", "Croatia" },
+    { "HT", "Haiti" },
+    { "HU", "Hungary" },
+    { "ID", "Indonesia" },
+    { "IE", "Ireland" },
+    { "IL", "Israel" },
+    { "IN", "India" },
+    { "IQ", "Iraq" },
+    { "IR", "Iran" },
+    { "IS", "Iceland" },
+    { "IT", "Italy" },
+    { "JM", "Jamaica" },
+    { "JO", "Jordan" },
+    { "JP", "Japan" },
+    { "KE", "Kenya" },
+    { "KG", "Kyrgyzstan" },
+    { "KH", "Cambodia" },
+    { "KR", "South Korea" },
+    { "KW", "Kuwait" },
+    { "KZ", "Kazakhstan" },
+    { "LA", "Laos" },
+    { "LB", "Lebanon" },
+    { "LI", "Liechtenstein" },
+    { "LK", "Sri Lanka" },
+    { "LT", "Lithuania" },
+    { "LU", "Luxembourg" },
+    { "LV", "Latvia" },
+    { "LY", "Libya" },
+    { "MA", "Morocco" },
+    { "MC", "Principality of Monaco" },
+    { "MD", "Moldava" },
+    { "MD", "Moldova" },
+    { "ME", "Montenegro" },
+    { "MK", "Former Yugoslav Republic of Macedonia" },
+    { "ML", "Mali" },
+    { "MM", "Myanmar" },
+    { "MN", "Mongolia" },
+    { "MO", "Macau S.A.R." },
+    { "MT", "Malta" },
+    { "MV", "Maldives" },
+    { "MX", "Mexico" },
+    { "MY", "Malaysia" },
+    { "NG", "Nigeria" },
+    { "NI", "Nicaragua" },
+    { "NL", "Netherlands" },
+    { "NO", "Norway" },
+    { "NP", "Nepal" },
+    { "NZ", "New Zealand" },
+    { "OM", "Oman" },
+    { "PA", "Panama" },
+    { "PE", "Peru" },
+    { "PH", "Philippines" },
+    { "PK", "Islamic Republic of Pakistan" },
+    { "PL", "Poland" },
+    { "PR", "Puerto Rico" },
+    { "PT", "Portugal" },
+    { "PY", "Paraguay" },
+    { "QA", "Qatar" },
+    { "RE", "Reunion" },
+    { "RO", "Romania" },
+    { "RS", "Serbia" },
+    { "RU", "Russia" },
+    { "RW", "Rwanda" },
+    { "SA", "Saudi Arabia" },
+    { "SE", "Sweden" },
+    { "SG", "Singapore" },
+    { "SI", "Slovenia" },
+    { "SK", "Slovak" },
+    { "SN", "Senegal" },
+    { "SO", "Somalia" },
+    { "SR", "Suriname" },
+    { "SV", "El Salvador" },
+    { "SY", "Syria" },
+    { "TH", "Thailand" },
+    { "TJ", "Tajikistan" },
+    { "TM", "Turkmenistan" },
+    { "TN", "Tunisia" },
+    { "TR", "Turkey" },
+    { "TT", "Trinidad and Tobago" },
+    { "TW", "Taiwan" },
+    { "TZ", "Tanzania" },
+    { "UA", "Ukraine" },
+    { "US", "United States" },
+    { "UY", "Uruguay" },
+    { "VA", "Vatican" },
+    { "VE", "Venezuela" },
+    { "VN", "Viet Nam" },
+    { "YE", "Yemen" },
+    { "ZA", "South Africa" },
+    { "ZW", "Zimbabwe" }
+  };
+
+/* Given a string STRING, find the set of indices i such that TABLE[i].code is
+   the given STRING.  It is a range [lo,hi-1].  */
+typedef struct { size_t lo; size_t hi; } range_t;
+static void
+search (const struct table_entry *table, size_t table_size, const char *string,
+        range_t *result)
+{
+  /* The table is sorted.  Perform a binary search.  */
+  size_t hi = table_size;
+  size_t lo = 0;
+  while (lo < hi)
+    {
+      /* Invariant:
+         for i < lo, strcmp (table[i].code, string) < 0,
+         for i >= hi, strcmp (table[i].code, string) > 0.  */
+      size_t mid = (hi + lo) >> 1; /* >= lo, < hi */
+      int cmp = strcmp (table[mid].code, string);
+      if (cmp < 0)
+        lo = mid + 1;
+      else if (cmp > 0)
+        hi = mid;
+      else
+        {
+          /* Found an i with
+               strcmp (language_table[i].code, string) == 0.
+             Find the entire interval of such i.  */
+          {
+            size_t i;
+
+            for (i = mid; i > lo; )
+              {
+                i--;
+                if (strcmp (table[i].code, string) < 0)
+                  {
+                    lo = i + 1;
+                    break;
+                  }
+              }
+          }
+          {
+            size_t i;
+
+            for (i = mid + 1; i < hi; i++)
+              {
+                if (strcmp (table[i].code, string) > 0)
+                  {
+                    hi = i;
+                    break;
+                  }
+              }
+          }
+          /* The set of i with
+               strcmp (language_table[i].code, string) == 0
+             is the interval [lo, hi-1].  */
+          break;
+        }
+    }
+  result->lo = lo;
+  result->hi = hi;
+}
+
+/* Like setlocale, but accept also locale names in the form ll or ll_CC,
+   where ll is an ISO 639 language code and CC is an ISO 3166 country code.  */
+static char *
+setlocale_unixlike (int category, const char *locale)
+{
+  char *result;
+  char llCC_buf[64];
+  char ll_buf[64];
+  char CC_buf[64];
+
+  /* The native Windows implementation of setlocale understands the special
+     locale name "C", but not "POSIX".  Therefore map "POSIX" to "C".  */
+  if (locale != NULL && strcmp (locale, "POSIX") == 0)
+    locale = "C";
+
+  /* First, try setlocale with the original argument unchanged.  */
+  result = setlocale_mtsafe (category, locale);
+  if (result != NULL)
+    return result;
+
+  /* Otherwise, assume the argument is in the form
+       language[_territory][.codeset][@modifier]
+     and try to map it using the tables.  */
+  if (strlen (locale) < sizeof (llCC_buf))
+    {
+      /* Second try: Remove the codeset part.  */
+      {
+        const char *p = locale;
+        char *q = llCC_buf;
+
+        /* Copy the part before the dot.  */
+        for (; *p != '\0' && *p != '.'; p++, q++)
+          *q = *p;
+        if (*p == '.')
+          /* Skip the part up to the '@', if any.  */
+          for (; *p != '\0' && *p != '@'; p++)
+            ;
+        /* Copy the part starting with '@', if any.  */
+        for (; *p != '\0'; p++, q++)
+          *q = *p;
+        *q = '\0';
+      }
+      /* llCC_buf now contains
+           language[_territory][@modifier]
+       */
+      if (strcmp (llCC_buf, locale) != 0)
+        {
+          result = setlocale (category, llCC_buf);
+          if (result != NULL)
+            return result;
+        }
+      /* Look it up in language_table.  */
+      {
+        range_t range;
+        size_t i;
+
+        search (language_table,
+                sizeof (language_table) / sizeof (language_table[0]),
+                llCC_buf,
+                &range);
+
+        for (i = range.lo; i < range.hi; i++)
+          {
+            /* Try the replacement in language_table[i].  */
+            result = setlocale (category, language_table[i].english);
+            if (result != NULL)
+              return result;
+          }
+      }
+      /* Split language[_territory][@modifier]
+         into  ll_buf = language[@modifier]
+         and   CC_buf = territory
+       */
+      {
+        const char *underscore = strchr (llCC_buf, '_');
+        if (underscore != NULL)
+          {
+            const char *territory_start = underscore + 1;
+            const char *territory_end = strchr (territory_start, '@');
+            if (territory_end == NULL)
+              territory_end = territory_start + strlen (territory_start);
+
+            memcpy (ll_buf, llCC_buf, underscore - llCC_buf);
+            strcpy (ll_buf + (underscore - llCC_buf), territory_end);
+
+            memcpy (CC_buf, territory_start, territory_end - territory_start);
+            CC_buf[territory_end - territory_start] = '\0';
+
+            {
+              /* Look up ll_buf in language_table
+                 and CC_buf in country_table.  */
+              range_t language_range;
+
+              search (language_table,
+                      sizeof (language_table) / sizeof (language_table[0]),
+                      ll_buf,
+                      &language_range);
+              if (language_range.lo < language_range.hi)
+                {
+                  range_t country_range;
+
+                  search (country_table,
+                          sizeof (country_table) / sizeof (country_table[0]),
+                          CC_buf,
+                          &country_range);
+                  if (country_range.lo < country_range.hi)
+                    {
+                      size_t i;
+                      size_t j;
+
+                      for (i = language_range.lo; i < language_range.hi; i++)
+                        for (j = country_range.lo; j < country_range.hi; j++)
+                          {
+                            /* Concatenate the replacements.  */
+                            const char *part1 = language_table[i].english;
+                            size_t part1_len = strlen (part1);
+                            const char *part2 = country_table[j].english;
+                            size_t part2_len = strlen (part2) + 1;
+                            char buf[64+64];
+
+                            if (!(part1_len + 1 + part2_len <= sizeof (buf)))
+                              abort ();
+                            memcpy (buf, part1, part1_len);
+                            buf[part1_len] = '_';
+                            memcpy (buf + part1_len + 1, part2, part2_len);
+
+                            /* Try the concatenated replacements.  */
+                            result = setlocale (category, buf);
+                            if (result != NULL)
+                              return result;
+                          }
+                    }
+
+                  /* Try omitting the country entirely.  This may set a locale
+                     corresponding to the wrong country, but is better than
+                     failing entirely.  */
+                  {
+                    size_t i;
+
+                    for (i = language_range.lo; i < language_range.hi; i++)
+                      {
+                        /* Try only the language replacement.  */
+                        result =
+                          setlocale (category, language_table[i].english);
+                        if (result != NULL)
+                          return result;
+                      }
+                  }
+                }
+            }
+          }
+      }
+    }
+
+  /* Failed.  */
+  return NULL;
+}
+
+#  elif defined __ANDROID__
+
+/* Like setlocale, but accept also the locale names "C" and "POSIX".  */
+static char *
+setlocale_unixlike (int category, const char *locale)
+{
+  char *result = setlocale_mtsafe (category, locale);
+  if (result == NULL)
+    switch (category)
+      {
+      case LC_CTYPE:
+      case LC_NUMERIC:
+      case LC_TIME:
+      case LC_COLLATE:
+      case LC_MONETARY:
+      case LC_MESSAGES:
+      case LC_ALL:
+      case LC_PAPER:
+      case LC_NAME:
+      case LC_ADDRESS:
+      case LC_TELEPHONE:
+      case LC_MEASUREMENT:
+        if (locale == NULL
+            || strcmp (locale, "C") == 0 || strcmp (locale, "POSIX") == 0)
+          result = (char *) "C";
+        break;
+      default:
+        break;
+      }
+  return result;
+}
+#   define setlocale setlocale_unixlike
+
+#  else
+#   define setlocale_unixlike setlocale_mtsafe
+#  endif
+
+#  if LC_MESSAGES == 1729
+
+/* The system does not store an LC_MESSAGES locale category.  Do it here.  */
+static char lc_messages_name[64] = "C";
+
+/* Like setlocale, but support also LC_MESSAGES.  */
+static char *
+setlocale_single (int category, const char *locale)
+{
+  if (category == LC_MESSAGES)
+    {
+      if (locale != NULL)
+        {
+          lc_messages_name[sizeof (lc_messages_name) - 1] = '\0';
+          strncpy (lc_messages_name, locale, sizeof (lc_messages_name) - 1);
+        }
+      return lc_messages_name;
+    }
+  else
+    return setlocale_unixlike (category, locale);
+}
+
+#  else
+#   define setlocale_single setlocale_unixlike
+#  endif
+
+#  if defined __APPLE__ && defined __MACH__
+
+/* Mapping from language to main territory where that language is spoken.  */
+static char const locales_with_principal_territory[][6 + 1] =
+  {
+                /* Language     Main territory */
+    "ace_ID",   /* Achinese     Indonesia */
+    "af_ZA",    /* Afrikaans    South Africa */
+    "ak_GH",    /* Akan         Ghana */
+    "am_ET",    /* Amharic      Ethiopia */
+    "an_ES",    /* Aragonese    Spain */
+    "ang_GB",   /* Old English  Britain */
+    "arn_CL",   /* Mapudungun   Chile */
+    "as_IN",    /* Assamese     India */
+    "ast_ES",   /* Asturian     Spain */
+    "av_RU",    /* Avaric       Russia */
+    "awa_IN",   /* Awadhi       India */
+    "az_AZ",    /* Azerbaijani  Azerbaijan */
+    "ban_ID",   /* Balinese     Indonesia */
+    "be_BY",    /* Belarusian   Belarus */
+    "bej_SD",   /* Beja         Sudan */
+    "bem_ZM",   /* Bemba        Zambia */
+    "bg_BG",    /* Bulgarian    Bulgaria */
+    "bho_IN",   /* Bhojpuri     India */
+    "bi_VU",    /* Bislama      Vanuatu */
+    "bik_PH",   /* Bikol        Philippines */
+    "bin_NG",   /* Bini         Nigeria */
+    "bm_ML",    /* Bambara      Mali */
+    "bn_IN",    /* Bengali      India */
+    "bo_CN",    /* Tibetan      China */
+    "br_FR",    /* Breton       France */
+    "bs_BA",    /* Bosnian      Bosnia */
+    "bug_ID",   /* Buginese     Indonesia */
+    "ca_ES",    /* Catalan      Spain */
+    "ce_RU",    /* Chechen      Russia */
+    "ceb_PH",   /* Cebuano      Philippines */
+    "co_FR",    /* Corsican     France */
+    "cr_CA",    /* Cree         Canada */
+    /* Don't put "crh_UZ" or "crh_UA" here.  That would be asking for fruitless
+       political discussion.  */
+    "cs_CZ",    /* Czech        Czech Republic */
+    "csb_PL",   /* Kashubian    Poland */
+    "cy_GB",    /* Welsh        Britain */
+    "da_DK",    /* Danish       Denmark */
+    "de_DE",    /* German       Germany */
+    "din_SD",   /* Dinka        Sudan */
+    "doi_IN",   /* Dogri        India */
+    "dsb_DE",   /* Lower Sorbian        Germany */
+    "dv_MV",    /* Divehi       Maldives */
+    "dz_BT",    /* Dzongkha     Bhutan */
+    "ee_GH",    /* Éwé          Ghana */
+    "el_GR",    /* Greek        Greece */
+    /* Don't put "en_GB" or "en_US" here.  That would be asking for fruitless
+       political discussion.  */
+    "es_ES",    /* Spanish      Spain */
+    "et_EE",    /* Estonian     Estonia */
+    "fa_IR",    /* Persian      Iran */
+    "fi_FI",    /* Finnish      Finland */
+    "fil_PH",   /* Filipino     Philippines */
+    "fj_FJ",    /* Fijian       Fiji */
+    "fo_FO",    /* Faroese      Faeroe Islands */
+    "fon_BJ",   /* Fon          Benin */
+    "fr_FR",    /* French       France */
+    "fur_IT",   /* Friulian     Italy */
+    "fy_NL",    /* Western Frisian      Netherlands */
+    "ga_IE",    /* Irish        Ireland */
+    "gd_GB",    /* Scottish Gaelic      Britain */
+    "gon_IN",   /* Gondi        India */
+    "gsw_CH",   /* Swiss German Switzerland */
+    "gu_IN",    /* Gujarati     India */
+    "he_IL",    /* Hebrew       Israel */
+    "hi_IN",    /* Hindi        India */
+    "hil_PH",   /* Hiligaynon   Philippines */
+    "hr_HR",    /* Croatian     Croatia */
+    "hsb_DE",   /* Upper Sorbian        Germany */
+    "ht_HT",    /* Haitian      Haiti */
+    "hu_HU",    /* Hungarian    Hungary */
+    "hy_AM",    /* Armenian     Armenia */
+    "id_ID",    /* Indonesian   Indonesia */
+    "ig_NG",    /* Igbo         Nigeria */
+    "ii_CN",    /* Sichuan Yi   China */
+    "ilo_PH",   /* Iloko        Philippines */
+    "is_IS",    /* Icelandic    Iceland */
+    "it_IT",    /* Italian      Italy */
+    "ja_JP",    /* Japanese     Japan */
+    "jab_NG",   /* Hyam         Nigeria */
+    "jv_ID",    /* Javanese     Indonesia */
+    "ka_GE",    /* Georgian     Georgia */
+    "kab_DZ",   /* Kabyle       Algeria */
+    "kaj_NG",   /* Jju          Nigeria */
+    "kam_KE",   /* Kamba        Kenya */
+    "kmb_AO",   /* Kimbundu     Angola */
+    "kcg_NG",   /* Tyap         Nigeria */
+    "kdm_NG",   /* Kagoma       Nigeria */
+    "kg_CD",    /* Kongo        Democratic Republic of Congo */
+    "kk_KZ",    /* Kazakh       Kazakhstan */
+    "kl_GL",    /* Kalaallisut  Greenland */
+    "km_KH",    /* Central Khmer        Cambodia */
+    "kn_IN",    /* Kannada      India */
+    "ko_KR",    /* Korean       Korea (South) */
+    "kok_IN",   /* Konkani      India */
+    "kr_NG",    /* Kanuri       Nigeria */
+    "kru_IN",   /* Kurukh       India */
+    "ky_KG",    /* Kyrgyz       Kyrgyzstan */
+    "lg_UG",    /* Ganda        Uganda */
+    "li_BE",    /* Limburgish   Belgium */
+    "lo_LA",    /* Laotian      Laos */
+    "lt_LT",    /* Lithuanian   Lithuania */
+    "lu_CD",    /* Luba-Katanga Democratic Republic of Congo */
+    "lua_CD",   /* Luba-Lulua   Democratic Republic of Congo */
+    "luo_KE",   /* Luo          Kenya */
+    "lv_LV",    /* Latvian      Latvia */
+    "mad_ID",   /* Madurese     Indonesia */
+    "mag_IN",   /* Magahi       India */
+    "mai_IN",   /* Maithili     India */
+    "mak_ID",   /* Makasar      Indonesia */
+    "man_ML",   /* Mandingo     Mali */
+    "men_SL",   /* Mende        Sierra Leone */
+    "mfe_MU",   /* Mauritian Creole     Mauritius */
+    "mg_MG",    /* Malagasy     Madagascar */
+    "mi_NZ",    /* Maori        New Zealand */
+    "min_ID",   /* Minangkabau  Indonesia */
+    "mk_MK",    /* Macedonian   North Macedonia */
+    "ml_IN",    /* Malayalam    India */
+    "mn_MN",    /* Mongolian    Mongolia */
+    "mni_IN",   /* Manipuri     India */
+    "mos_BF",   /* Mossi        Burkina Faso */
+    "mr_IN",    /* Marathi      India */
+    "ms_MY",    /* Malay        Malaysia */
+    "mt_MT",    /* Maltese      Malta */
+    "mwr_IN",   /* Marwari      India */
+    "my_MM",    /* Burmese      Myanmar */
+    "na_NR",    /* Nauru        Nauru */
+    "nah_MX",   /* Nahuatl      Mexico */
+    "nap_IT",   /* Neapolitan   Italy */
+    "nb_NO",    /* Norwegian Bokmål    Norway */
+    "nds_DE",   /* Low Saxon    Germany */
+    "ne_NP",    /* Nepali       Nepal */
+    "nl_NL",    /* Dutch        Netherlands */
+    "nn_NO",    /* Norwegian Nynorsk    Norway */
+    "no_NO",    /* Norwegian    Norway */
+    "nr_ZA",    /* South Ndebele        South Africa */
+    "nso_ZA",   /* Northern Sotho       South Africa */
+    "ny_MW",    /* Chichewa     Malawi */
+    "nym_TZ",   /* Nyamwezi     Tanzania */
+    "nyn_UG",   /* Nyankole     Uganda */
+    "oc_FR",    /* Occitan      France */
+    "oj_CA",    /* Ojibwa       Canada */
+    "or_IN",    /* Oriya        India */
+    "pa_IN",    /* Punjabi      India */
+    "pag_PH",   /* Pangasinan   Philippines */
+    "pam_PH",   /* Pampanga     Philippines */
+    "pap_AN",   /* Papiamento   Netherlands Antilles - this line can be removed in 2018 */
+    "pbb_CO",   /* Páez         Colombia */
+    "pl_PL",    /* Polish       Poland */
+    "ps_AF",    /* Pashto       Afghanistan */
+    "pt_PT",    /* Portuguese   Portugal */
+    "raj_IN",   /* Rajasthani   India */
+    "rm_CH",    /* Romansh      Switzerland */
+    "rn_BI",    /* Kirundi      Burundi */
+    "ro_RO",    /* Romanian     Romania */
+    "ru_RU",    /* Russian      Russia */
+    "rw_RW",    /* Kinyarwanda  Rwanda */
+    "sa_IN",    /* Sanskrit     India */
+    "sah_RU",   /* Yakut        Russia */
+    "sas_ID",   /* Sasak        Indonesia */
+    "sat_IN",   /* Santali      India */
+    "sc_IT",    /* Sardinian    Italy */
+    "scn_IT",   /* Sicilian     Italy */
+    "sg_CF",    /* Sango        Central African Republic */
+    "shn_MM",   /* Shan         Myanmar */
+    "si_LK",    /* Sinhala      Sri Lanka */
+    "sid_ET",   /* Sidamo       Ethiopia */
+    "sk_SK",    /* Slovak       Slovakia */
+    "sl_SI",    /* Slovenian    Slovenia */
+    "sm_WS",    /* Samoan       Samoa */
+    "smn_FI",   /* Inari Sami   Finland */
+    "sms_FI",   /* Skolt Sami   Finland */
+    "so_SO",    /* Somali       Somalia */
+    "sq_AL",    /* Albanian     Albania */
+    "sr_RS",    /* Serbian      Serbia */
+    "srr_SN",   /* Serer        Senegal */
+    "suk_TZ",   /* Sukuma       Tanzania */
+    "sus_GN",   /* Susu         Guinea */
+    "sv_SE",    /* Swedish      Sweden */
+    "te_IN",    /* Telugu       India */
+    "tem_SL",   /* Timne        Sierra Leone */
+    "tet_ID",   /* Tetum        Indonesia */
+    "tg_TJ",    /* Tajik        Tajikistan */
+    "th_TH",    /* Thai         Thailand */
+    "ti_ER",    /* Tigrinya     Eritrea */
+    "tiv_NG",   /* Tiv          Nigeria */
+    "tk_TM",    /* Turkmen      Turkmenistan */
+    "tl_PH",    /* Tagalog      Philippines */
+    "to_TO",    /* Tonga        Tonga */
+    "tpi_PG",   /* Tok Pisin    Papua New Guinea */
+    "tr_TR",    /* Turkish      Turkey */
+    "tum_MW",   /* Tumbuka      Malawi */
+    "ug_CN",    /* Uighur       China */
+    "uk_UA",    /* Ukrainian    Ukraine */
+    "umb_AO",   /* Umbundu      Angola */
+    "ur_PK",    /* Urdu         Pakistan */
+    "uz_UZ",    /* Uzbek        Uzbekistan */
+    "ve_ZA",    /* Venda        South Africa */
+    "vi_VN",    /* Vietnamese   Vietnam */
+    "wa_BE",    /* Walloon      Belgium */
+    "wal_ET",   /* Walamo       Ethiopia */
+    "war_PH",   /* Waray        Philippines */
+    "wen_DE",   /* Sorbian      Germany */
+    "yao_MW",   /* Yao          Malawi */
+    "zap_MX"    /* Zapotec      Mexico */
+  };
+
+/* Compare just the language part of two locale names.  */
+static int
+langcmp (const char *locale1, const char *locale2)
+{
+  size_t locale1_len;
+  size_t locale2_len;
+  int cmp;
+
+  {
+    const char *locale1_end = strchr (locale1, '_');
+    if (locale1_end != NULL)
+      locale1_len = locale1_end - locale1;
+    else
+      locale1_len = strlen (locale1);
+  }
+  {
+    const char *locale2_end = strchr (locale2, '_');
+    if (locale2_end != NULL)
+      locale2_len = locale2_end - locale2;
+    else
+      locale2_len = strlen (locale2);
+  }
+
+  if (locale1_len < locale2_len)
+    {
+      cmp = memcmp (locale1, locale2, locale1_len);
+      if (cmp == 0)
+        cmp = -1;
+    }
+  else
+    {
+      cmp = memcmp (locale1, locale2, locale2_len);
+      if (locale1_len > locale2_len && cmp == 0)
+        cmp = 1;
+    }
+
+  return cmp;
+}
+
+/* Given a locale name, return the main locale with the same language,
+   or NULL if not found.
+   For example: "fr_DE" -> "fr_FR".  */
+static const char *
+get_main_locale_with_same_language (const char *locale)
+{
+#   define table locales_with_principal_territory
+  /* The table is sorted.  Perform a binary search.  */
+  size_t hi = sizeof (table) / sizeof (table[0]);
+  size_t lo = 0;
+  while (lo < hi)
+    {
+      /* Invariant:
+         for i < lo, langcmp (table[i], locale) < 0,
+         for i >= hi, langcmp (table[i], locale) > 0.  */
+      size_t mid = (hi + lo) >> 1; /* >= lo, < hi */
+      int cmp = langcmp (table[mid], locale);
+      if (cmp < 0)
+        lo = mid + 1;
+      else if (cmp > 0)
+        hi = mid;
+      else
+        {
+          /* Found an i with
+               langcmp (language_table[i], locale) == 0.
+             Verify that it is the only such i.  */
+          if (mid > lo && langcmp (table[mid - 1], locale) >= 0)
+            abort ();
+          if (mid + 1 < hi && langcmp (table[mid + 1], locale) <= 0)
+            abort ();
+          return table[mid];
+        }
+    }
+#   undef table
+  return NULL;
+}
+
+/* Mapping from territory to main language that is spoken in that territory.  */
+static char const locales_with_principal_language[][6 + 1] =
+  {
+    /* This is based on the set of existing locales in glibc, with duplicates
+       removed, and on the Wikipedia pages named "Languages of <territory>".
+       If in doubt, use the locale that exists in macOS.  For example, the only
+       "*_IN" locale in macOS 10.13 is "hi_IN", so use that.  */
+    /* A useful shell function for producing a line of this table is:
+         func_line ()
+         {
+           # Usage: func_line ll_CC
+           ll=`echo "$1" | sed -e 's|_.*||'`
+           cc=`echo "$1" | sed -e 's|^.*_||'`
+           llx=`sed -n -e "s|^${ll} ||p" < gettext-tools/doc/ISO_639`
+           ccx=`expand gettext-tools/doc/ISO_3166 | sed -n -e "s|^${cc}  *||p"`
+           echo "    \"$1\",    /$X* ${llx} ${ccx} *$X/"
+         }
+     */
+              /* Main language  Territory */
+    "ca_AD",    /* Catalan      Andorra */
+    "ar_AE",    /* Arabic       United Arab Emirates */
+    "ps_AF",    /* Pashto       Afghanistan */
+    "en_AG",    /* English      Antigua and Barbuda */
+    "sq_AL",    /* Albanian     Albania */
+    "hy_AM",    /* Armenian     Armenia */
+    "pap_AN",   /* Papiamento   Netherlands Antilles - this line can be removed in 2018 */
+    "pt_AO",    /* Portuguese   Angola */
+    "es_AR",    /* Spanish      Argentina */
+    "de_AT",    /* German       Austria */
+    "en_AU",    /* English      Australia */
+    /* Aruba has two official languages: "nl_AW", "pap_AW".  */
+    "az_AZ",    /* Azerbaijani  Azerbaijan */
+    "bs_BA",    /* Bosnian      Bosnia */
+    "bn_BD",    /* Bengali      Bangladesh */
+    "nl_BE",    /* Dutch        Belgium */
+    "fr_BF",    /* French       Burkina Faso */
+    "bg_BG",    /* Bulgarian    Bulgaria */
+    "ar_BH",    /* Arabic       Bahrain */
+    "rn_BI",    /* Kirundi      Burundi */
+    "fr_BJ",    /* French       Benin */
+    "es_BO",    /* Spanish      Bolivia */
+    "pt_BR",    /* Portuguese   Brazil */
+    "dz_BT",    /* Dzongkha     Bhutan */
+    "en_BW",    /* English      Botswana */
+    "be_BY",    /* Belarusian   Belarus */
+    "en_CA",    /* English      Canada */
+    "fr_CD",    /* French       Democratic Republic of Congo */
+    "sg_CF",    /* Sango        Central African Republic */
+    "de_CH",    /* German       Switzerland */
+    "es_CL",    /* Spanish      Chile */
+    "zh_CN",    /* Chinese      China */
+    "es_CO",    /* Spanish      Colombia */
+    "es_CR",    /* Spanish      Costa Rica */
+    "es_CU",    /* Spanish      Cuba */
+    /* Curaçao has three official languages: "nl_CW", "pap_CW", "en_CW".  */
+    "el_CY",    /* Greek        Cyprus */
+    "cs_CZ",    /* Czech        Czech Republic */
+    "de_DE",    /* German       Germany */
+    /* Djibouti has two official languages: "ar_DJ" and "fr_DJ".  */
+    "da_DK",    /* Danish       Denmark */
+    "es_DO",    /* Spanish      Dominican Republic */
+    "ar_DZ",    /* Arabic       Algeria */
+    "es_EC",    /* Spanish      Ecuador */
+    "et_EE",    /* Estonian     Estonia */
+    "ar_EG",    /* Arabic       Egypt */
+    "ti_ER",    /* Tigrinya     Eritrea */
+    "es_ES",    /* Spanish      Spain */
+    "am_ET",    /* Amharic      Ethiopia */
+    "fi_FI",    /* Finnish      Finland */
+    /* Fiji has three official languages: "en_FJ", "fj_FJ", "hif_FJ".  */
+    "fo_FO",    /* Faroese      Faeroe Islands */
+    "fr_FR",    /* French       France */
+    "en_GB",    /* English      Britain */
+    "ka_GE",    /* Georgian     Georgia */
+    "en_GH",    /* English      Ghana */
+    "kl_GL",    /* Kalaallisut  Greenland */
+    "fr_GN",    /* French       Guinea */
+    "el_GR",    /* Greek        Greece */
+    "es_GT",    /* Spanish      Guatemala */
+    "zh_HK",    /* Chinese      Hong Kong */
+    "es_HN",    /* Spanish      Honduras */
+    "hr_HR",    /* Croatian     Croatia */
+    "ht_HT",    /* Haitian      Haiti */
+    "hu_HU",    /* Hungarian    Hungary */
+    "id_ID",    /* Indonesian   Indonesia */
+    "en_IE",    /* English      Ireland */
+    "he_IL",    /* Hebrew       Israel */
+    "hi_IN",    /* Hindi        India */
+    "ar_IQ",    /* Arabic       Iraq */
+    "fa_IR",    /* Persian      Iran */
+    "is_IS",    /* Icelandic    Iceland */
+    "it_IT",    /* Italian      Italy */
+    "ar_JO",    /* Arabic       Jordan */
+    "ja_JP",    /* Japanese     Japan */
+    "sw_KE",    /* Swahili      Kenya */
+    "ky_KG",    /* Kyrgyz       Kyrgyzstan */
+    "km_KH",    /* Central Khmer        Cambodia */
+    "ko_KR",    /* Korean       Korea (South) */
+    "ar_KW",    /* Arabic       Kuwait */
+    "kk_KZ",    /* Kazakh       Kazakhstan */
+    "lo_LA",    /* Laotian      Laos */
+    "ar_LB",    /* Arabic       Lebanon */
+    "de_LI",    /* German       Liechtenstein */
+    "si_LK",    /* Sinhala      Sri Lanka */
+    "lt_LT",    /* Lithuanian   Lithuania */
+    /* Luxembourg has three official languages: "lb_LU", "fr_LU", "de_LU".  */
+    "lv_LV",    /* Latvian      Latvia */
+    "ar_LY",    /* Arabic       Libya */
+    "ar_MA",    /* Arabic       Morocco */
+    "sr_ME",    /* Serbian      Montenegro */
+    "mg_MG",    /* Malagasy     Madagascar */
+    "mk_MK",    /* Macedonian   North Macedonia */
+    "fr_ML",    /* French       Mali */
+    "my_MM",    /* Burmese      Myanmar */
+    "mn_MN",    /* Mongolian    Mongolia */
+    "mt_MT",    /* Maltese      Malta */
+    "mfe_MU",   /* Mauritian Creole     Mauritius */
+    "dv_MV",    /* Divehi       Maldives */
+    "ny_MW",    /* Chichewa     Malawi */
+    "es_MX",    /* Spanish      Mexico */
+    "ms_MY",    /* Malay        Malaysia */
+    "en_NG",    /* English      Nigeria */
+    "es_NI",    /* Spanish      Nicaragua */
+    "nl_NL",    /* Dutch        Netherlands */
+    "no_NO",    /* Norwegian    Norway */
+    "ne_NP",    /* Nepali       Nepal */
+    "na_NR",    /* Nauru        Nauru */
+    "niu_NU",   /* Niuean       Niue */
+    "en_NZ",    /* English      New Zealand */
+    "ar_OM",    /* Arabic       Oman */
+    "es_PA",    /* Spanish      Panama */
+    "es_PE",    /* Spanish      Peru */
+    "tpi_PG",   /* Tok Pisin    Papua New Guinea */
+    "fil_PH",   /* Filipino     Philippines */
+    "pa_PK",    /* Punjabi      Pakistan */
+    "pl_PL",    /* Polish       Poland */
+    "es_PR",    /* Spanish      Puerto Rico */
+    "pt_PT",    /* Portuguese   Portugal */
+    "es_PY",    /* Spanish      Paraguay */
+    "ar_QA",    /* Arabic       Qatar */
+    "ro_RO",    /* Romanian     Romania */
+    "sr_RS",    /* Serbian      Serbia */
+    "ru_RU",    /* Russian      Russia */
+    "rw_RW",    /* Kinyarwanda  Rwanda */
+    "ar_SA",    /* Arabic       Saudi Arabia */
+    "en_SC",    /* English      Seychelles */
+    "ar_SD",    /* Arabic       Sudan */
+    "sv_SE",    /* Swedish      Sweden */
+    "en_SG",    /* English      Singapore */
+    "sl_SI",    /* Slovenian    Slovenia */
+    "sk_SK",    /* Slovak       Slovakia */
+    "en_SL",    /* English      Sierra Leone */
+    "fr_SN",    /* French       Senegal */
+    "so_SO",    /* Somali       Somalia */
+    "ar_SS",    /* Arabic       South Sudan */
+    "es_SV",    /* Spanish      El Salvador */
+    "ar_SY",    /* Arabic       Syria */
+    "th_TH",    /* Thai         Thailand */
+    "tg_TJ",    /* Tajik        Tajikistan */
+    "tk_TM",    /* Turkmen      Turkmenistan */
+    "ar_TN",    /* Arabic       Tunisia */
+    "to_TO",    /* Tonga        Tonga */
+    "tr_TR",    /* Turkish      Turkey */
+    "zh_TW",    /* Chinese      Taiwan */
+    "sw_TZ",    /* Swahili      Tanzania */
+    "uk_UA",    /* Ukrainian    Ukraine */
+    "lg_UG",    /* Ganda        Uganda */
+    "en_US",    /* English      United States of America */
+    "es_UY",    /* Spanish      Uruguay */
+    "uz_UZ",    /* Uzbek        Uzbekistan */
+    "es_VE",    /* Spanish      Venezuela */
+    "vi_VN",    /* Vietnamese   Vietnam */
+    "bi_VU",    /* Bislama      Vanuatu */
+    "sm_WS",    /* Samoan       Samoa */
+    "ar_YE",    /* Arabic       Yemen */
+    "en_ZA",    /* English      South Africa */
+    "en_ZM",    /* English      Zambia */
+    "en_ZW"     /* English      Zimbabwe */
+  };
+
+/* Compare just the territory part of two locale names.  */
+static int
+terrcmp (const char *locale1, const char *locale2)
+{
+  const char *territory1 = strrchr (locale1, '_') + 1;
+  const char *territory2 = strrchr (locale2, '_') + 1;
+
+  return strcmp (territory1, territory2);
+}
+
+/* Given a locale name, return the locale corresponding to the main language
+   with the same territory, or NULL if not found.
+   For example: "fr_DE" -> "de_DE".  */
+static const char *
+get_main_locale_with_same_territory (const char *locale)
+{
+  if (strrchr (locale, '_') != NULL)
+    {
+#   define table locales_with_principal_language
+      /* The table is sorted.  Perform a binary search.  */
+      size_t hi = sizeof (table) / sizeof (table[0]);
+      size_t lo = 0;
+      while (lo < hi)
+        {
+          /* Invariant:
+             for i < lo, terrcmp (table[i], locale) < 0,
+             for i >= hi, terrcmp (table[i], locale) > 0.  */
+          size_t mid = (hi + lo) >> 1; /* >= lo, < hi */
+          int cmp = terrcmp (table[mid], locale);
+          if (cmp < 0)
+            lo = mid + 1;
+          else if (cmp > 0)
+            hi = mid;
+          else
+            {
+              /* Found an i with
+                   terrcmp (language_table[i], locale) == 0.
+                 Verify that it is the only such i.  */
+              if (mid > lo && terrcmp (table[mid - 1], locale) >= 0)
+                abort ();
+              if (mid + 1 < hi && terrcmp (table[mid + 1], locale) <= 0)
+                abort ();
+              return table[mid];
+            }
+        }
+#   undef table
+    }
+  return NULL;
+}
+
+#  endif
+
+char *
+setlocale_improved (int category, const char *locale)
+{
+  if (locale != NULL && locale[0] == '\0')
+    {
+      /* A request to the set the current locale to the default locale.  */
+      if (category == LC_ALL)
+        {
+          /* Set LC_CTYPE first.  Then the other categories.  */
+          static int const categories[] =
+            {
+              LC_CTYPE,
+              LC_NUMERIC,
+              LC_TIME,
+              LC_COLLATE,
+              LC_MONETARY,
+              LC_MESSAGES
+            };
+          char *saved_locale;
+          const char *base_name;
+          unsigned int i;
+
+          /* Back up the old locale, in case one of the steps fails.  */
+          saved_locale = setlocale (LC_ALL, NULL);
+          if (saved_locale == NULL)
+            return NULL;
+          saved_locale = strdup (saved_locale);
+          if (saved_locale == NULL)
+            return NULL;
+
+          /* Set LC_CTYPE category.  Set all other categories (except possibly
+             LC_MESSAGES) to the same value in the same call; this is likely to
+             save calls.  */
+          base_name =
+            gl_locale_name_environ (LC_CTYPE, category_to_name (LC_CTYPE));
+          if (base_name == NULL)
+            base_name = gl_locale_name_default ();
+
+          if (setlocale_unixlike (LC_ALL, base_name) != NULL)
+            {
+              /* LC_CTYPE category already set.  */
+              i = 1;
+            }
+          else
+            {
+              /* On Mac OS X, "UTF-8" is a valid locale name for LC_CTYPE but
+                 not for LC_ALL.  Therefore this call may fail.  So, try
+                 another base_name.  */
+              base_name = "C";
+              if (setlocale_unixlike (LC_ALL, base_name) == NULL)
+                goto fail;
+              i = 0;
+            }
+#  if defined _WIN32 && ! defined __CYGWIN__
+          /* On native Windows, setlocale(LC_ALL,...) may succeed but set the
+             LC_CTYPE category to an invalid value ("C") when it does not
+             support the specified encoding.  Report a failure instead.  */
+          if (strchr (base_name, '.') != NULL
+              && strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+            goto fail;
+#  endif
+
+          for (; i < sizeof (categories) / sizeof (categories[0]); i++)
+            {
+              int cat = categories[i];
+              const char *name;
+
+              name = gl_locale_name_environ (cat, category_to_name (cat));
+              if (name == NULL)
+                name = gl_locale_name_default ();
+
+              /* If name is the same as base_name, it has already been set
+                 through the setlocale call before the loop.  */
+              if (strcmp (name, base_name) != 0
+#  if LC_MESSAGES == 1729
+                  || cat == LC_MESSAGES
+#  endif
+                 )
+                if (setlocale_single (cat, name) == NULL)
+#  if defined __APPLE__ && defined __MACH__
+                  {
+                    /* On Mac OS X 10.13, some locales can be set through
+                       System Preferences > Language & Region, that are not
+                       supported by libc.  The system's setlocale() falls
+                       back to "C" for these locale categories.  We can do
+                       better, by trying an existing locale with the same
+                       language or an existing locale with the same territory.
+                       If we can't, print a warning, to limit user
+                       expectations.  */
+                    int warn = 0;
+
+                    if (cat == LC_CTYPE)
+                      warn = (setlocale_single (cat, "UTF-8") == NULL);
+                    else if (cat == LC_MESSAGES)
+                      {
+#   if HAVE_CFLOCALECOPYPREFERREDLANGUAGES || HAVE_CFPREFERENCESCOPYAPPVALUE /* MacOS X 10.4 or newer */
+                        /* Take the primary language preference.  */
+#    if HAVE_CFLOCALECOPYPREFERREDLANGUAGES /* MacOS X 10.5 or newer */
+                        CFArrayRef prefArray = CFLocaleCopyPreferredLanguages ();
+#    elif HAVE_CFPREFERENCESCOPYAPPVALUE /* MacOS X 10.4 or newer */
+                        CFTypeRef preferences =
+                          CFPreferencesCopyAppValue (CFSTR ("AppleLanguages"),
+                                                     kCFPreferencesCurrentApplication);
+                        if (preferences != NULL
+                            && CFGetTypeID (preferences) == CFArrayGetTypeID ())
+                          {
+                            CFArrayRef prefArray = (CFArrayRef)preferences;
+#    endif
+                            int n = CFArrayGetCount (prefArray);
+                            if (n > 0)
+                              {
+                                char buf[256];
+                                CFTypeRef element = CFArrayGetValueAtIndex (prefArray, 0);
+                                if (element != NULL
+                                    && CFGetTypeID (element) == CFStringGetTypeID ()
+                                    && CFStringGetCString ((CFStringRef)element,
+                                                           buf, sizeof (buf),
+                                                           kCFStringEncodingASCII))
+                                  {
+                                    /* Remove the country.
+                                       E.g. "zh-Hans-DE" -> "zh-Hans".  */
+                                    char *last_minus = strrchr (buf, '-');
+                                    if (last_minus != NULL)
+                                      *last_minus = '\0';
+
+                                    /* Convert to Unix locale name.
+                                       E.g. "zh-Hans" -> "zh_CN".  */
+                                    gl_locale_name_canonicalize (buf);
+
+                                    /* Try setlocale with this value.  */
+                                    if (setlocale_single (cat, buf) == NULL)
+                                      {
+                                        const char *last_try =
+                                          get_main_locale_with_same_language (buf);
+
+                                        if (last_try == NULL
+                                            || setlocale_single (cat, last_try) == NULL)
+                                          warn = 1;
+                                      }
+                                  }
+                              }
+#    if HAVE_CFLOCALECOPYPREFERREDLANGUAGES /* MacOS X 10.5 or newer */
+                        CFRelease (prefArray);
+#    elif HAVE_CFPREFERENCESCOPYAPPVALUE /* MacOS X 10.4 or newer */
+                          }
+#    endif
+#   else
+                        const char *last_try =
+                          get_main_locale_with_same_language (name);
+
+                        if (last_try == NULL
+                            || setlocale_single (cat, last_try) == NULL)
+                          warn = 1;
+#   endif
+                      }
+                    else
+                      {
+                        /* For LC_NUMERIC, the application should use the locale
+                           properties kCFLocaleDecimalSeparator,
+                           kCFLocaleGroupingSeparator.
+                           For LC_TIME, the application should use the locale
+                           property kCFLocaleCalendarIdentifier.
+                           For LC_COLLATE, the application should use the locale
+                           properties kCFLocaleCollationIdentifier,
+                           kCFLocaleCollatorIdentifier.
+                           For LC_MONETARY, the applicationshould use the locale
+                           properties kCFLocaleCurrencySymbol,
+                           kCFLocaleCurrencyCode.
+                           But since most applications don't have macOS specific
+                           code like this, try an existing locale with the same
+                           territory.  */
+                        const char *last_try =
+                          get_main_locale_with_same_territory (name);
+
+                        if (last_try == NULL
+                            || setlocale_single (cat, last_try) == NULL)
+                          warn = 1;
+                      }
+
+                    if (warn)
+                      {
+                        /* Warn only if the environment variable
+                           SETLOCALE_VERBOSE is set.  Otherwise these warnings
+                           are just annoyances, since normal users won't invoke
+                           'localedef'.  */
+                        const char *verbose = getenv ("SETLOCALE_VERBOSE");
+                        if (verbose != NULL && verbose[0] != '\0')
+                          fprintf (stderr,
+                                   "Warning: Failed to set locale category %s to %s.\n",
+                                   category_to_name (cat), name);
+                      }
+                  }
+#  else
+                  goto fail;
+#  endif
+            }
+
+          /* All steps were successful.  */
+          free (saved_locale);
+          return setlocale (LC_ALL, NULL);
+
+        fail:
+          if (saved_locale[0] != '\0') /* don't risk an endless recursion */
+            setlocale (LC_ALL, saved_locale);
+          free (saved_locale);
+          return NULL;
+        }
+      else
+        {
+          const char *name =
+            gl_locale_name_environ (category, category_to_name (category));
+          if (name == NULL)
+            name = gl_locale_name_default ();
+
+          return setlocale_single (category, name);
+        }
+    }
+  else
+    {
+#  if defined _WIN32 && ! defined __CYGWIN__
+      if (category == LC_ALL && locale != NULL && strchr (locale, '.') != NULL)
+        {
+          char *saved_locale;
+
+          /* Back up the old locale.  */
+          saved_locale = setlocale (LC_ALL, NULL);
+          if (saved_locale == NULL)
+            return NULL;
+          saved_locale = strdup (saved_locale);
+          if (saved_locale == NULL)
+            return NULL;
+
+          if (setlocale_unixlike (LC_ALL, locale) == NULL)
+            {
+              free (saved_locale);
+              return NULL;
+            }
+
+          /* On native Windows, setlocale(LC_ALL,...) may succeed but set the
+             LC_CTYPE category to an invalid value ("C") when it does not
+             support the specified encoding.  Report a failure instead.  */
+          if (strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+            {
+              if (saved_locale[0] != '\0') /* don't risk an endless recursion */
+                setlocale (LC_ALL, saved_locale);
+              free (saved_locale);
+              return NULL;
+            }
+
+          /* It was really successful.  */
+          free (saved_locale);
+          return setlocale (LC_ALL, NULL);
+        }
+      else
+#  endif
+        return setlocale_single (category, locale);
+    }
+}
+
+# endif /* NEED_SETLOCALE_IMPROVED */
+
+#endif
diff --git a/src/gl/tests/setlocale_null.c b/src/gl/tests/setlocale_null.c
new file mode 100644
index 0000000..059af4e
--- /dev/null
+++ b/src/gl/tests/setlocale_null.c
@@ -0,0 +1,411 @@
+/* Query the name of the current global locale.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "setlocale_null.h"
+
+#include <errno.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#if defined _WIN32 && !defined __CYGWIN__
+# include <wchar.h>
+#endif
+
+#if !(SETLOCALE_NULL_ALL_MTSAFE && SETLOCALE_NULL_ONE_MTSAFE)
+# if defined _WIN32 && !defined __CYGWIN__
+
+#  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#  include <windows.h>
+
+# elif HAVE_PTHREAD_API
+
+#  include <pthread.h>
+#  if HAVE_THREADS_H && HAVE_WEAK_SYMBOLS
+#   include <threads.h>
+#   pragma weak thrd_exit
+#   define c11_threads_in_use() (thrd_exit != NULL)
+#  else
+#   define c11_threads_in_use() 0
+#  endif
+
+# elif HAVE_THREADS_H
+
+#  include <threads.h>
+
+# endif
+#endif
+
+/* Use the system's setlocale() function, not the gnulib override, here.  */
+#undef setlocale
+
+static const char *
+setlocale_null_androidfix (int category)
+{
+  const char *result = setlocale (category, NULL);
+
+#ifdef __ANDROID__
+  if (result == NULL)
+    switch (category)
+      {
+      case LC_CTYPE:
+      case LC_NUMERIC:
+      case LC_TIME:
+      case LC_COLLATE:
+      case LC_MONETARY:
+      case LC_MESSAGES:
+      case LC_ALL:
+      case LC_PAPER:
+      case LC_NAME:
+      case LC_ADDRESS:
+      case LC_TELEPHONE:
+      case LC_MEASUREMENT:
+        result = "C";
+        break;
+      default:
+        break;
+      }
+#endif
+
+  return result;
+}
+
+static int
+setlocale_null_unlocked (int category, char *buf, size_t bufsize)
+{
+#if defined _WIN32 && !defined __CYGWIN__ && defined _MSC_VER
+  /* On native Windows, nowadays, the setlocale() implementation is based
+     on _wsetlocale() and uses malloc() for the result.  We are better off
+     using _wsetlocale() directly.  */
+  const wchar_t *result = _wsetlocale (category, NULL);
+
+  if (result == NULL)
+    {
+      /* CATEGORY is invalid.  */
+      if (bufsize > 0)
+        /* Return an empty string in BUF.
+           This is a convenience for callers that don't want to write explicit
+           code for handling EINVAL.  */
+        buf[0] = '\0';
+      return EINVAL;
+    }
+  else
+    {
+      size_t length = wcslen (result);
+      if (length < bufsize)
+        {
+          size_t i;
+
+          /* Convert wchar_t[] -> char[], assuming plain ASCII.  */
+          for (i = 0; i <= length; i++)
+            buf[i] = result[i];
+
+          return 0;
+        }
+      else
+        {
+          if (bufsize > 0)
+            {
+              /* Return a truncated result in BUF.
+                 This is a convenience for callers that don't want to write
+                 explicit code for handling ERANGE.  */
+              size_t i;
+
+              /* Convert wchar_t[] -> char[], assuming plain ASCII.  */
+              for (i = 0; i < bufsize; i++)
+                buf[i] = result[i];
+              buf[bufsize - 1] = '\0';
+            }
+          return ERANGE;
+        }
+    }
+#else
+  const char *result = setlocale_null_androidfix (category);
+
+  if (result == NULL)
+    {
+      /* CATEGORY is invalid.  */
+      if (bufsize > 0)
+        /* Return an empty string in BUF.
+           This is a convenience for callers that don't want to write explicit
+           code for handling EINVAL.  */
+        buf[0] = '\0';
+      return EINVAL;
+    }
+  else
+    {
+      size_t length = strlen (result);
+      if (length < bufsize)
+        {
+          memcpy (buf, result, length + 1);
+          return 0;
+        }
+      else
+        {
+          if (bufsize > 0)
+            {
+              /* Return a truncated result in BUF.
+                 This is a convenience for callers that don't want to write
+                 explicit code for handling ERANGE.  */
+              memcpy (buf, result, bufsize - 1);
+              buf[bufsize - 1] = '\0';
+            }
+          return ERANGE;
+        }
+    }
+#endif
+}
+
+#if !(SETLOCALE_NULL_ALL_MTSAFE && SETLOCALE_NULL_ONE_MTSAFE) /* musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin */
+
+/* Use a lock, so that no two threads can invoke setlocale_null_unlocked
+   at the same time.  */
+
+/* Prohibit renaming this symbol.  */
+# undef gl_get_setlocale_null_lock
+
+# if defined _WIN32 && !defined __CYGWIN__
+
+extern __declspec(dllimport) CRITICAL_SECTION *gl_get_setlocale_null_lock (void);
+
+static int
+setlocale_null_with_lock (int category, char *buf, size_t bufsize)
+{
+  CRITICAL_SECTION *lock = gl_get_setlocale_null_lock ();
+  int ret;
+
+  EnterCriticalSection (lock);
+  ret = setlocale_null_unlocked (category, buf, bufsize);
+  LeaveCriticalSection (lock);
+
+  return ret;
+}
+
+# elif HAVE_PTHREAD_API /* musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin */
+
+extern
+#  if defined _WIN32 || defined __CYGWIN__
+  __declspec(dllimport)
+#  endif
+  pthread_mutex_t *gl_get_setlocale_null_lock (void);
+
+#  if HAVE_WEAK_SYMBOLS /* musl libc, FreeBSD, NetBSD, OpenBSD, Haiku */
+
+    /* Avoid the need to link with '-lpthread'.  */
+#   pragma weak pthread_mutex_lock
+#   pragma weak pthread_mutex_unlock
+
+    /* Determine whether libpthread is in use.  */
+#   pragma weak pthread_mutexattr_gettype
+    /* See the comments in lock.h.  */
+#   define pthread_in_use() \
+      (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
+
+#  else
+#   define pthread_in_use() 1
+#  endif
+
+static int
+setlocale_null_with_lock (int category, char *buf, size_t bufsize)
+{
+  if (pthread_in_use())
+    {
+      pthread_mutex_t *lock = gl_get_setlocale_null_lock ();
+      int ret;
+
+      if (pthread_mutex_lock (lock))
+        abort ();
+      ret = setlocale_null_unlocked (category, buf, bufsize);
+      if (pthread_mutex_unlock (lock))
+        abort ();
+
+      return ret;
+    }
+  else
+    return setlocale_null_unlocked (category, buf, bufsize);
+}
+
+# elif HAVE_THREADS_H
+
+extern mtx_t *gl_get_setlocale_null_lock (void);
+
+static int
+setlocale_null_with_lock (int category, char *buf, size_t bufsize)
+{
+  mtx_t *lock = gl_get_setlocale_null_lock ();
+  int ret;
+
+  if (mtx_lock (lock) != thrd_success)
+    abort ();
+  ret = setlocale_null_unlocked (category, buf, bufsize);
+  if (mtx_unlock (lock) != thrd_success)
+    abort ();
+
+  return ret;
+}
+
+# endif
+
+#endif
+
+int
+setlocale_null_r (int category, char *buf, size_t bufsize)
+{
+#if SETLOCALE_NULL_ALL_MTSAFE
+# if SETLOCALE_NULL_ONE_MTSAFE
+
+  return setlocale_null_unlocked (category, buf, bufsize);
+
+# else
+
+  if (category == LC_ALL)
+    return setlocale_null_unlocked (category, buf, bufsize);
+  else
+    return setlocale_null_with_lock (category, buf, bufsize);
+
+# endif
+#else
+# if SETLOCALE_NULL_ONE_MTSAFE
+
+  if (category == LC_ALL)
+    return setlocale_null_with_lock (category, buf, bufsize);
+  else
+    return setlocale_null_unlocked (category, buf, bufsize);
+
+# else
+
+  return setlocale_null_with_lock (category, buf, bufsize);
+
+# endif
+#endif
+}
+
+const char *
+setlocale_null (int category)
+{
+#if SETLOCALE_NULL_ALL_MTSAFE && SETLOCALE_NULL_ONE_MTSAFE
+  return setlocale_null_androidfix (category);
+#else
+
+  /* This call must be multithread-safe.  To achieve this without using
+     thread-local storage:
+       1. We use a specific static buffer for each possible CATEGORY
+          argument.  So that different threads can call setlocale_mtsafe
+          with different CATEGORY arguments, without interfering.
+       2. We use a simple strcpy or memcpy to fill this static buffer.
+          Filling it through, for example, strcpy + strcat would not be
+          guaranteed to leave the buffer's contents intact if another thread
+          is currently accessing it.  If necessary, the contents is first
+          assembled in a stack-allocated buffer.  */
+  if (category == LC_ALL)
+    {
+# if SETLOCALE_NULL_ALL_MTSAFE
+      return setlocale_null_androidfix (LC_ALL);
+# else
+      char buf[SETLOCALE_NULL_ALL_MAX];
+      static char resultbuf[SETLOCALE_NULL_ALL_MAX];
+
+      if (setlocale_null_r (LC_ALL, buf, sizeof (buf)))
+        return "C";
+      strcpy (resultbuf, buf);
+      return resultbuf;
+# endif
+    }
+  else
+    {
+# if SETLOCALE_NULL_ONE_MTSAFE
+      return setlocale_null_androidfix (category);
+# else
+      enum
+        {
+          LC_CTYPE_INDEX,
+          LC_NUMERIC_INDEX,
+          LC_TIME_INDEX,
+          LC_COLLATE_INDEX,
+          LC_MONETARY_INDEX,
+          LC_MESSAGES_INDEX,
+#  ifdef LC_PAPER
+          LC_PAPER_INDEX,
+#  endif
+#  ifdef LC_NAME
+          LC_NAME_INDEX,
+#  endif
+#  ifdef LC_ADDRESS
+          LC_ADDRESS_INDEX,
+#  endif
+#  ifdef LC_TELEPHONE
+          LC_TELEPHONE_INDEX,
+#  endif
+#  ifdef LC_MEASUREMENT
+          LC_MEASUREMENT_INDEX,
+#  endif
+#  ifdef LC_IDENTIFICATION
+          LC_IDENTIFICATION_INDEX,
+#  endif
+          LC_INDICES_COUNT
+        }
+        i;
+      char buf[SETLOCALE_NULL_MAX];
+      static char resultbuf[LC_INDICES_COUNT][SETLOCALE_NULL_MAX];
+      int err;
+
+      err = setlocale_null_r (category, buf, sizeof (buf));
+      if (err == EINVAL)
+        return NULL;
+      if (err)
+        return "C";
+
+      switch (category)
+        {
+        case LC_CTYPE:          i = LC_CTYPE_INDEX;          break;
+        case LC_NUMERIC:        i = LC_NUMERIC_INDEX;        break;
+        case LC_TIME:           i = LC_TIME_INDEX;           break;
+        case LC_COLLATE:        i = LC_COLLATE_INDEX;        break;
+        case LC_MONETARY:       i = LC_MONETARY_INDEX;       break;
+        case LC_MESSAGES:       i = LC_MESSAGES_INDEX;       break;
+#  ifdef LC_PAPER
+        case LC_PAPER:          i = LC_PAPER_INDEX;          break;
+#  endif
+#  ifdef LC_NAME
+        case LC_NAME:           i = LC_NAME_INDEX;           break;
+#  endif
+#  ifdef LC_ADDRESS
+        case LC_ADDRESS:        i = LC_ADDRESS_INDEX;        break;
+#  endif
+#  ifdef LC_TELEPHONE
+        case LC_TELEPHONE:      i = LC_TELEPHONE_INDEX;      break;
+#  endif
+#  ifdef LC_MEASUREMENT
+        case LC_MEASUREMENT:    i = LC_MEASUREMENT_INDEX;    break;
+#  endif
+#  ifdef LC_IDENTIFICATION
+        case LC_IDENTIFICATION: i = LC_IDENTIFICATION_INDEX; break;
+#  endif
+        default:
+          /* If you get here, a #ifdef LC_xxx is missing.  */
+          abort ();
+        }
+
+      strcpy (resultbuf[i], buf);
+      return resultbuf[i];
+# endif
+    }
+#endif
+}
diff --git a/src/gl/tests/setlocale_null.h b/src/gl/tests/setlocale_null.h
new file mode 100644
index 0000000..5f45856
--- /dev/null
+++ b/src/gl/tests/setlocale_null.h
@@ -0,0 +1,82 @@
+/* Query the name of the current global locale.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#ifndef _SETLOCALE_NULL_H
+#define _SETLOCALE_NULL_H
+
+#include <stddef.h>
+
+#include "arg-nonnull.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Recommended size of a buffer for a locale name for a single category.
+   On glibc systems, you can have locale names that are relative file names;
+   assume a maximum length 256.
+   In native Windows, in 2018 the longest locale name was of length 58
+   ("FYRO Macedonian_Former Yugoslav Republic of Macedonia.1251").  */
+#define SETLOCALE_NULL_MAX (256+1)
+
+/* Recommended size of a buffer for a locale name with all categories.
+   On glibc systems, you can have locale names that are relative file names;
+   assume maximum length 256 for each.  There are 12 categories; so, the
+   maximum total length is 148+12*256.
+   In native Windows, there are 5 categories, and the maximum total length is
+   55+5*58.  */
+#define SETLOCALE_NULL_ALL_MAX (148+12*256+1)
+
+/* setlocale_null_r (CATEGORY, BUF, BUFSIZE) is like setlocale (CATEGORY, NULL),
+   except that
+     - it is guaranteed to be multithread-safe,
+     - it returns the resulting locale category name or locale name in the
+       user-supplied buffer BUF, which must be BUFSIZE bytes long.
+   The recommended minimum buffer size is
+     - SETLOCALE_NULL_MAX for CATEGORY != LC_ALL, and
+     - SETLOCALE_NULL_ALL_MAX for CATEGORY == LC_ALL.
+   The return value is an error code: 0 if the call is successful, EINVAL if
+   CATEGORY is invalid, or ERANGE if BUFSIZE is smaller than the length needed
+   size (including the trailing NUL byte).  In the latter case, a truncated
+   result is returned in BUF, but still NUL-terminated if BUFSIZE > 0.
+   For this call to be multithread-safe, *all* calls to
+   setlocale (CATEGORY, NULL) in all other threads must have been converted
+   to use setlocale_null_r or setlocale_null as well, and the other threads
+   must not make other setlocale invocations (since changing the global locale
+   has side effects on all threads).  */
+extern int setlocale_null_r (int category, char *buf, size_t bufsize)
+  _GL_ARG_NONNULL ((2));
+
+/* setlocale_null (CATEGORY) is like setlocale (CATEGORY, NULL), except that
+   it is guaranteed to be multithread-safe.
+   The return value is NULL if CATEGORY is invalid.
+   For this call to be multithread-safe, *all* calls to
+   setlocale (CATEGORY, NULL) in all other threads must have been converted
+   to use setlocale_null_r or setlocale_null as well, and the other threads
+   must not make other setlocale invocations (since changing the global locale
+   has side effects on all threads).  */
+extern const char *setlocale_null (int category);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SETLOCALE_NULL_H */
diff --git a/src/gl/tests/sig-handler.c b/src/gl/tests/sig-handler.c
new file mode 100644
index 0000000..52c3621
--- /dev/null
+++ b/src/gl/tests/sig-handler.c
@@ -0,0 +1,3 @@
+#include <config.h>
+#define SIG_HANDLER_INLINE _GL_EXTERN_INLINE
+#include "sig-handler.h"
diff --git a/src/gl/tests/sig-handler.h b/src/gl/tests/sig-handler.h
new file mode 100644
index 0000000..4253cc9
--- /dev/null
+++ b/src/gl/tests/sig-handler.h
@@ -0,0 +1,51 @@
+/* Convenience declarations when working with <signal.h>.
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _GL_SIG_HANDLER_H
+#define _GL_SIG_HANDLER_H
+
+#include <signal.h>
+
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef SIG_HANDLER_INLINE
+# define SIG_HANDLER_INLINE _GL_INLINE
+#endif
+
+/* Convenience type when working with signal handlers.  */
+typedef void (*sa_handler_t) (int);
+
+/* Return the handler of a signal, as a sa_handler_t value regardless
+   of its true type.  The resulting function can be compared to
+   special values like SIG_IGN but it is not portable to call it.  */
+SIG_HANDLER_INLINE sa_handler_t _GL_ATTRIBUTE_PURE
+get_handler (struct sigaction const *a)
+{
+  /* POSIX says that special values like SIG_IGN can only occur when
+     action.sa_flags does not contain SA_SIGINFO.  But in Linux 2.4,
+     for example, sa_sigaction and sa_handler are aliases and a signal
+     is ignored if sa_sigaction (after casting) equals SIG_IGN.  In
+     this case, this implementation relies on the fact that the two
+     are aliases, and simply returns sa_handler.  */
+  return a->sa_handler;
+}
+
+_GL_INLINE_HEADER_END
+
+#endif /* _GL_SIG_HANDLER_H */
diff --git a/src/gl/tests/sigaction.c b/src/gl/tests/sigaction.c
new file mode 100644
index 0000000..05e7a11
--- /dev/null
+++ b/src/gl/tests/sigaction.c
@@ -0,0 +1,204 @@
+/* POSIX compatible signal blocking.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+   Written by Eric Blake <ebb9@byu.net>, 2008.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <signal.h>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+/* This implementation of sigaction is tailored to native Windows behavior:
+   signal() has SysV semantics (ie. the handler is uninstalled before
+   it is invoked).  This is an inherent data race if an asynchronous
+   signal is sent twice in a row before we can reinstall our handler,
+   but there's nothing we can do about it.  Meanwhile, sigprocmask()
+   is not present, and while we can use the gnulib replacement to
+   provide critical sections, it too suffers from potential data races
+   in the face of an ill-timed asynchronous signal.  And we compound
+   the situation by reading static storage in a signal handler, which
+   POSIX warns is not generically async-signal-safe.  Oh well.
+
+   Additionally:
+     - We don't implement SA_NOCLDSTOP or SA_NOCLDWAIT, because SIGCHLD
+       is not defined.
+     - We don't implement SA_ONSTACK, because sigaltstack() is not present.
+     - We ignore SA_RESTART, because blocking native Windows API calls are
+       not interrupted anyway when an asynchronous signal occurs, and the
+       MSVCRT runtime never sets errno to EINTR.
+     - We don't implement SA_SIGINFO because it is impossible to do so
+       portably.
+
+   POSIX states that an application should not mix signal() and
+   sigaction().  We support the use of signal() within the gnulib
+   sigprocmask() substitute, but all other application code linked
+   with this module should stick with only sigaction().  */
+
+/* Check some of our assumptions.  */
+#if defined SIGCHLD || defined HAVE_SIGALTSTACK || defined HAVE_SIGINTERRUPT
+# error "Revisit the assumptions made in the sigaction module"
+#endif
+
+/* Out-of-range substitutes make a good fallback for uncatchable
+   signals.  */
+#ifndef SIGKILL
+# define SIGKILL (-1)
+#endif
+#ifndef SIGSTOP
+# define SIGSTOP (-1)
+#endif
+
+/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias
+   for the signal SIGABRT.  Only one signal handler is stored for both
+   SIGABRT and SIGABRT_COMPAT.  SIGABRT_COMPAT is not a signal of its own.  */
+#if defined _WIN32 && ! defined __CYGWIN__
+# undef SIGABRT_COMPAT
+# define SIGABRT_COMPAT 6
+#endif
+
+/* A signal handler.  */
+typedef void (*handler_t) (int signal);
+
+/* Set of current actions.  If sa_handler for an entry is NULL, then
+   that signal is not currently handled by the sigaction handler.  */
+static struct sigaction volatile action_array[NSIG] /* = 0 */;
+
+/* Signal handler that is installed for signals.  */
+static void
+sigaction_handler (int sig)
+{
+  handler_t handler;
+  sigset_t mask;
+  sigset_t oldmask;
+  int saved_errno = errno;
+  if (sig < 0 || NSIG <= sig || !action_array[sig].sa_handler)
+    {
+      /* Unexpected situation; be careful to avoid recursive abort.  */
+      if (sig == SIGABRT)
+        signal (SIGABRT, SIG_DFL);
+      abort ();
+    }
+
+  /* Reinstall the signal handler when required; otherwise update the
+     bookkeeping so that the user's handler may call sigaction and get
+     accurate results.  We know the signal isn't currently blocked, or
+     we wouldn't be in its handler, therefore we know that we are not
+     interrupting a sigaction() call.  There is a race where any
+     asynchronous instance of the same signal occurring before we
+     reinstall the handler will trigger the default handler; oh
+     well.  */
+  handler = action_array[sig].sa_handler;
+  if ((action_array[sig].sa_flags & SA_RESETHAND) == 0)
+    signal (sig, sigaction_handler);
+  else
+    action_array[sig].sa_handler = NULL;
+
+  /* Block appropriate signals.  */
+  mask = action_array[sig].sa_mask;
+  if ((action_array[sig].sa_flags & SA_NODEFER) == 0)
+    sigaddset (&mask, sig);
+  sigprocmask (SIG_BLOCK, &mask, &oldmask);
+
+  /* Invoke the user's handler, then restore prior mask.  */
+  errno = saved_errno;
+  handler (sig);
+  saved_errno = errno;
+  sigprocmask (SIG_SETMASK, &oldmask, NULL);
+  errno = saved_errno;
+}
+
+/* Change and/or query the action that will be taken on delivery of
+   signal SIG.  If not NULL, ACT describes the new behavior.  If not
+   NULL, OACT is set to the prior behavior.  Return 0 on success, or
+   set errno and return -1 on failure.  */
+int
+sigaction (int sig, const struct sigaction *restrict act,
+           struct sigaction *restrict oact)
+{
+  sigset_t mask;
+  sigset_t oldmask;
+  int saved_errno;
+
+  if (sig < 0 || NSIG <= sig || sig == SIGKILL || sig == SIGSTOP
+      || (act && act->sa_handler == SIG_ERR))
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+#ifdef SIGABRT_COMPAT
+  if (sig == SIGABRT_COMPAT)
+    sig = SIGABRT;
+#endif
+
+  /* POSIX requires sigaction() to be async-signal-safe.  In other
+     words, if an asynchronous signal can occur while we are anywhere
+     inside this function, the user's handler could then call
+     sigaction() recursively and expect consistent results.  We meet
+     this rule by using sigprocmask to block all signals before
+     modifying any data structure that could be read from a signal
+     handler; this works since we know that the gnulib sigprocmask
+     replacement does not try to use sigaction() from its handler.  */
+  if (!act && !oact)
+    return 0;
+  sigfillset (&mask);
+  sigprocmask (SIG_BLOCK, &mask, &oldmask);
+  if (oact)
+    {
+      if (action_array[sig].sa_handler)
+        *oact = action_array[sig];
+      else
+        {
+          /* Safe to change the handler at will here, since all
+             signals are currently blocked.  */
+          oact->sa_handler = signal (sig, SIG_DFL);
+          if (oact->sa_handler == SIG_ERR)
+            goto failure;
+          signal (sig, oact->sa_handler);
+          oact->sa_flags = SA_RESETHAND | SA_NODEFER;
+          sigemptyset (&oact->sa_mask);
+        }
+    }
+
+  if (act)
+    {
+      /* Safe to install the handler before updating action_array,
+         since all signals are currently blocked.  */
+      if (act->sa_handler == SIG_DFL || act->sa_handler == SIG_IGN)
+        {
+          if (signal (sig, act->sa_handler) == SIG_ERR)
+            goto failure;
+          action_array[sig].sa_handler = NULL;
+        }
+      else
+        {
+          if (signal (sig, sigaction_handler) == SIG_ERR)
+            goto failure;
+          action_array[sig] = *act;
+        }
+    }
+  sigprocmask (SIG_SETMASK, &oldmask, NULL);
+  return 0;
+
+ failure:
+  saved_errno = errno;
+  sigprocmask (SIG_SETMASK, &oldmask, NULL);
+  errno = saved_errno;
+  return -1;
+}
diff --git a/src/gl/tests/signature.h b/src/gl/tests/signature.h
new file mode 100644
index 0000000..f791783
--- /dev/null
+++ b/src/gl/tests/signature.h
@@ -0,0 +1,48 @@
+/* Macro for checking that a function declaration is compliant.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef SIGNATURE_CHECK
+
+/* Check that the function FN takes the specified arguments ARGS with
+   a return type of RET.  This header is designed to be included after
+   <config.h> and the one system header that is supposed to contain
+   the function being checked, but prior to any other system headers
+   that are necessary for the unit test.  Therefore, this file does
+   not include any system headers, nor reference anything outside of
+   the macro arguments.  For an example, if foo.h should provide:
+
+   extern int foo (char, float);
+
+   then the unit test named test-foo.c would start out with:
+
+   #include <config.h>
+   #include <foo.h>
+   #include "signature.h"
+   SIGNATURE_CHECK (foo, int, (char, float));
+   #include <other.h>
+   ...
+*/
+# define SIGNATURE_CHECK(fn, ret, args) \
+  SIGNATURE_CHECK1 (fn, ret, args, __LINE__)
+
+/* Necessary to allow multiple SIGNATURE_CHECK lines in a unit test.
+   Note that the checks must not occupy the same line.  */
+# define SIGNATURE_CHECK1(fn, ret, args, id) \
+  SIGNATURE_CHECK2 (fn, ret, args, id) /* macroexpand line */
+# define SIGNATURE_CHECK2(fn, ret, args, id) \
+  static ret (* _GL_UNUSED signature_check ## id) args = fn
+
+#endif /* SIGNATURE_CHECK */
diff --git a/src/gl/tests/sigprocmask.c b/src/gl/tests/sigprocmask.c
new file mode 100644
index 0000000..52a2325
--- /dev/null
+++ b/src/gl/tests/sigprocmask.c
@@ -0,0 +1,349 @@
+/* POSIX compatible signal blocking.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2006.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <signal.h>
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+/* We assume that a platform without POSIX signal blocking functions
+   also does not have the POSIX sigaction() function, only the
+   signal() function.  We also assume signal() has SysV semantics,
+   where any handler is uninstalled prior to being invoked.  This is
+   true for native Windows platforms.  */
+
+/* We use raw signal(), but also provide a wrapper rpl_signal() so
+   that applications can query or change a blocked signal.  */
+#undef signal
+
+/* Provide invalid signal numbers as fallbacks if the uncatchable
+   signals are not defined.  */
+#ifndef SIGKILL
+# define SIGKILL (-1)
+#endif
+#ifndef SIGSTOP
+# define SIGSTOP (-1)
+#endif
+
+/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias
+   for the signal SIGABRT.  Only one signal handler is stored for both
+   SIGABRT and SIGABRT_COMPAT.  SIGABRT_COMPAT is not a signal of its own.  */
+#if defined _WIN32 && ! defined __CYGWIN__
+# undef SIGABRT_COMPAT
+# define SIGABRT_COMPAT 6
+#endif
+#ifdef SIGABRT_COMPAT
+# define SIGABRT_COMPAT_MASK (1U << SIGABRT_COMPAT)
+#else
+# define SIGABRT_COMPAT_MASK 0
+#endif
+
+typedef void (*handler_t) (int);
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static handler_t
+signal_nothrow (int sig, handler_t handler)
+{
+  handler_t result;
+
+  TRY_MSVC_INVAL
+    {
+      result = signal (sig, handler);
+    }
+  CATCH_MSVC_INVAL
+    {
+      result = SIG_ERR;
+      errno = EINVAL;
+    }
+  DONE_MSVC_INVAL;
+
+  return result;
+}
+# define signal signal_nothrow
+#endif
+
+/* Handling of gnulib defined signals.  */
+
+#if GNULIB_defined_SIGPIPE
+static handler_t SIGPIPE_handler = SIG_DFL;
+#endif
+
+#if GNULIB_defined_SIGPIPE
+static handler_t
+ext_signal (int sig, handler_t handler)
+{
+  switch (sig)
+    {
+    case SIGPIPE:
+      {
+        handler_t old_handler = SIGPIPE_handler;
+        SIGPIPE_handler = handler;
+        return old_handler;
+      }
+    default: /* System defined signal */
+      return signal (sig, handler);
+    }
+}
+# undef signal
+# define signal ext_signal
+#endif
+
+int
+sigismember (const sigset_t *set, int sig)
+{
+  if (sig >= 0 && sig < NSIG)
+    {
+      #ifdef SIGABRT_COMPAT
+      if (sig == SIGABRT_COMPAT)
+        sig = SIGABRT;
+      #endif
+
+      return (*set >> sig) & 1;
+    }
+  else
+    return 0;
+}
+
+int
+sigemptyset (sigset_t *set)
+{
+  *set = 0;
+  return 0;
+}
+
+int
+sigaddset (sigset_t *set, int sig)
+{
+  if (sig >= 0 && sig < NSIG)
+    {
+      #ifdef SIGABRT_COMPAT
+      if (sig == SIGABRT_COMPAT)
+        sig = SIGABRT;
+      #endif
+
+      *set |= 1U << sig;
+      return 0;
+    }
+  else
+    {
+      errno = EINVAL;
+      return -1;
+    }
+}
+
+int
+sigdelset (sigset_t *set, int sig)
+{
+  if (sig >= 0 && sig < NSIG)
+    {
+      #ifdef SIGABRT_COMPAT
+      if (sig == SIGABRT_COMPAT)
+        sig = SIGABRT;
+      #endif
+
+      *set &= ~(1U << sig);
+      return 0;
+    }
+  else
+    {
+      errno = EINVAL;
+      return -1;
+    }
+}
+
+
+int
+sigfillset (sigset_t *set)
+{
+  *set = ((2U << (NSIG - 1)) - 1) & ~ SIGABRT_COMPAT_MASK;
+  return 0;
+}
+
+/* Set of currently blocked signals.  */
+static volatile sigset_t blocked_set /* = 0 */;
+
+/* Set of currently blocked and pending signals.  */
+static volatile sig_atomic_t pending_array[NSIG] /* = { 0 } */;
+
+/* Signal handler that is installed for blocked signals.  */
+static void
+blocked_handler (int sig)
+{
+  /* Reinstall the handler, in case the signal occurs multiple times
+     while blocked.  There is an inherent race where an asynchronous
+     signal in between when the kernel uninstalled the handler and
+     when we reinstall it will trigger the default handler; oh
+     well.  */
+  signal (sig, blocked_handler);
+  if (sig >= 0 && sig < NSIG)
+    pending_array[sig] = 1;
+}
+
+int
+sigpending (sigset_t *set)
+{
+  sigset_t pending = 0;
+  int sig;
+
+  for (sig = 0; sig < NSIG; sig++)
+    if (pending_array[sig])
+      pending |= 1U << sig;
+  *set = pending;
+  return 0;
+}
+
+/* The previous signal handlers.
+   Only the array elements corresponding to blocked signals are relevant.  */
+static volatile handler_t old_handlers[NSIG];
+
+int
+sigprocmask (int operation, const sigset_t *set, sigset_t *old_set)
+{
+  if (old_set != NULL)
+    *old_set = blocked_set;
+
+  if (set != NULL)
+    {
+      sigset_t new_blocked_set;
+      sigset_t to_unblock;
+      sigset_t to_block;
+
+      switch (operation)
+        {
+        case SIG_BLOCK:
+          new_blocked_set = blocked_set | *set;
+          break;
+        case SIG_SETMASK:
+          new_blocked_set = *set;
+          break;
+        case SIG_UNBLOCK:
+          new_blocked_set = blocked_set & ~*set;
+          break;
+        default:
+          errno = EINVAL;
+          return -1;
+        }
+      to_unblock = blocked_set & ~new_blocked_set;
+      to_block = new_blocked_set & ~blocked_set;
+
+      if (to_block != 0)
+        {
+          int sig;
+
+          for (sig = 0; sig < NSIG; sig++)
+            if ((to_block >> sig) & 1)
+              {
+                pending_array[sig] = 0;
+                if ((old_handlers[sig] = signal (sig, blocked_handler)) != SIG_ERR)
+                  blocked_set |= 1U << sig;
+              }
+        }
+
+      if (to_unblock != 0)
+        {
+          sig_atomic_t received[NSIG];
+          int sig;
+
+          for (sig = 0; sig < NSIG; sig++)
+            if ((to_unblock >> sig) & 1)
+              {
+                if (signal (sig, old_handlers[sig]) != blocked_handler)
+                  /* The application changed a signal handler while the signal
+                     was blocked, bypassing our rpl_signal replacement.
+                     We don't support this.  */
+                  abort ();
+                received[sig] = pending_array[sig];
+                blocked_set &= ~(1U << sig);
+                pending_array[sig] = 0;
+              }
+            else
+              received[sig] = 0;
+
+          for (sig = 0; sig < NSIG; sig++)
+            if (received[sig])
+              raise (sig);
+        }
+    }
+  return 0;
+}
+
+/* Install the handler FUNC for signal SIG, and return the previous
+   handler.  */
+handler_t
+rpl_signal (int sig, handler_t handler)
+{
+  /* We must provide a wrapper, so that a user can query what handler
+     they installed even if that signal is currently blocked.  */
+  if (sig >= 0 && sig < NSIG && sig != SIGKILL && sig != SIGSTOP
+      && handler != SIG_ERR)
+    {
+      #ifdef SIGABRT_COMPAT
+      if (sig == SIGABRT_COMPAT)
+        sig = SIGABRT;
+      #endif
+
+      if (blocked_set & (1U << sig))
+        {
+          /* POSIX states that sigprocmask and signal are both
+             async-signal-safe.  This is not true of our
+             implementation - there is a slight data race where an
+             asynchronous interrupt on signal A can occur after we
+             install blocked_handler but before we have updated
+             old_handlers for signal B, such that handler A can see
+             stale information if it calls signal(B).  Oh well -
+             signal handlers really shouldn't try to manipulate the
+             installed handlers of unrelated signals.  */
+          handler_t result = old_handlers[sig];
+          old_handlers[sig] = handler;
+          return result;
+        }
+      else
+        return signal (sig, handler);
+    }
+  else
+    {
+      errno = EINVAL;
+      return SIG_ERR;
+    }
+}
+
+#if GNULIB_defined_SIGPIPE
+/* Raise the signal SIGPIPE.  */
+int
+_gl_raise_SIGPIPE (void)
+{
+  if (blocked_set & (1U << SIGPIPE))
+    pending_array[SIGPIPE] = 1;
+  else
+    {
+      handler_t handler = SIGPIPE_handler;
+      if (handler == SIG_DFL)
+        exit (128 + SIGPIPE);
+      else if (handler != SIG_IGN)
+        (*handler) (SIGPIPE);
+    }
+  return 0;
+}
+#endif
diff --git a/src/gl/tests/sleep.c b/src/gl/tests/sleep.c
new file mode 100644
index 0000000..cbb6042
--- /dev/null
+++ b/src/gl/tests/sleep.c
@@ -0,0 +1,76 @@
+/* Pausing execution of the current thread.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2007.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include <limits.h>
+
+#include "verify.h"
+
+#if defined _WIN32 && ! defined __CYGWIN__
+
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+
+unsigned int
+sleep (unsigned int seconds)
+{
+  unsigned int remaining;
+
+  /* Sleep for 1 second many times, because
+       1. Sleep is not interruptible by Ctrl-C,
+       2. we want to avoid arithmetic overflow while multiplying with 1000.  */
+  for (remaining = seconds; remaining > 0; remaining--)
+    Sleep (1000);
+
+  return remaining;
+}
+
+#elif HAVE_SLEEP
+
+# undef sleep
+
+/* Guarantee unlimited sleep and a reasonable return value.  Cygwin
+   1.5.x rejects attempts to sleep more than 49.7 days (2**32
+   milliseconds), but uses uninitialized memory which results in a
+   garbage answer.  Similarly, Linux 2.6.9 with glibc 2.3.4 has a too
+   small return value when asked to sleep more than 24.85 days.  */
+unsigned int
+rpl_sleep (unsigned int seconds)
+{
+  /* This requires int larger than 16 bits.  */
+  verify (UINT_MAX / 24 / 24 / 60 / 60);
+  const unsigned int limit = 24 * 24 * 60 * 60;
+  while (limit < seconds)
+    {
+      unsigned int result;
+      seconds -= limit;
+      result = sleep (limit);
+      if (result)
+        return seconds + result;
+    }
+  return sleep (seconds);
+}
+
+#else /* !HAVE_SLEEP */
+
+ #error "Please port gnulib sleep.c to your platform, possibly using usleep() or select(), then report this to bug-gnulib."
+
+#endif
diff --git a/src/gl/tests/strerror_r.c b/src/gl/tests/strerror_r.c
new file mode 100644
index 0000000..71965fb
--- /dev/null
+++ b/src/gl/tests/strerror_r.c
@@ -0,0 +1,452 @@
+/* strerror_r.c --- POSIX compatible system error routine
+
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
+
+#include <config.h>
+
+/* Enable declaration of sys_nerr and sys_errlist in <errno.h> on NetBSD.  */
+#define _NETBSD_SOURCE 1
+
+/* Specification.  */
+#include <string.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#if !HAVE_SNPRINTF
+# include <stdarg.h>
+#endif
+
+#include "strerror-override.h"
+
+#if (__GLIBC__ >= 2 || defined __UCLIBC__ || defined __CYGWIN__) && HAVE___XPG_STRERROR_R /* glibc >= 2.3.4, cygwin >= 1.7.9 */
+
+# define USE_XPG_STRERROR_R 1
+extern
+#ifdef __cplusplus
+"C"
+#endif
+int __xpg_strerror_r (int errnum, char *buf, size_t buflen);
+
+#elif HAVE_DECL_STRERROR_R && !(__GLIBC__ >= 2 || defined __UCLIBC__ || defined __CYGWIN__)
+
+/* The system's strerror_r function is OK, except that its third argument
+   is 'int', not 'size_t', or its return type is wrong.  */
+
+# include <limits.h>
+
+# define USE_SYSTEM_STRERROR_R 1
+
+#else /* (__GLIBC__ >= 2 || defined __UCLIBC__ || defined __CYGWIN__ ? !HAVE___XPG_STRERROR_R : !HAVE_DECL_STRERROR_R) */
+
+/* Use the system's strerror().  Exclude glibc and cygwin because the
+   system strerror_r has the wrong return type, and cygwin 1.7.9
+   strerror_r clobbers strerror.  */
+# undef strerror
+
+# define USE_SYSTEM_STRERROR 1
+
+# if defined __NetBSD__ || defined __hpux || (defined _WIN32 && !defined __CYGWIN__) || defined __sgi || (defined __sun && !defined _LP64) || defined __CYGWIN__
+
+/* No locking needed.  */
+
+/* Get catgets internationalization functions.  */
+#  if HAVE_CATGETS
+#   include <nl_types.h>
+#  endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Get sys_nerr, sys_errlist on HP-UX (otherwise only declared in C++ mode).
+   Get sys_nerr, sys_errlist on IRIX (otherwise only declared with _SGIAPI).  */
+#  if defined __hpux || defined __sgi
+extern int sys_nerr;
+extern char *sys_errlist[];
+#  endif
+
+/* Get sys_nerr on Solaris.  */
+#  if defined __sun && !defined _LP64
+extern int sys_nerr;
+#  endif
+
+#ifdef __cplusplus
+}
+#endif
+
+# else
+
+#  include "glthread/lock.h"
+
+/* This lock protects the buffer returned by strerror().  We assume that
+   no other uses of strerror() exist in the program.  */
+gl_lock_define_initialized(static, strerror_lock)
+
+# endif
+
+#endif
+
+/* On MSVC, there is no snprintf() function, just a _snprintf().
+   It is of lower quality, but sufficient for the simple use here.
+   We only have to make sure to NUL terminate the result (_snprintf
+   does not NUL terminate, like strncpy).  */
+#if !HAVE_SNPRINTF
+static int
+local_snprintf (char *buf, size_t buflen, const char *format, ...)
+{
+  va_list args;
+  int result;
+
+  va_start (args, format);
+  result = _vsnprintf (buf, buflen, format, args);
+  va_end (args);
+  if (buflen > 0 && (result < 0 || result >= buflen))
+    buf[buflen - 1] = '\0';
+  return result;
+}
+# undef snprintf
+# define snprintf local_snprintf
+#endif
+
+/* Copy as much of MSG into BUF as possible, without corrupting errno.
+   Return 0 if MSG fit in BUFLEN, otherwise return ERANGE.  */
+static int
+safe_copy (char *buf, size_t buflen, const char *msg)
+{
+  size_t len = strlen (msg);
+  size_t moved = len < buflen ? len : buflen - 1;
+
+  /* Although POSIX lets memmove corrupt errno, we don't
+     know of any implementation where this is a real problem.  */
+  memmove (buf, msg, moved);
+  buf[moved] = '\0';
+  return len < buflen ? 0 : ERANGE;
+}
+
+
+int
+strerror_r (int errnum, char *buf, size_t buflen)
+#undef strerror_r
+{
+  /* Filter this out now, so that rest of this replacement knows that
+     there is room for a non-empty message and trailing NUL.  */
+  if (buflen <= 1)
+    {
+      if (buflen)
+        *buf = '\0';
+      return ERANGE;
+    }
+  *buf = '\0';
+
+  /* Check for gnulib overrides.  */
+  {
+    char const *msg = strerror_override (errnum);
+
+    if (msg)
+      return safe_copy (buf, buflen, msg);
+  }
+
+  {
+    int ret;
+    int saved_errno = errno;
+
+#if USE_XPG_STRERROR_R
+
+    {
+      ret = __xpg_strerror_r (errnum, buf, buflen);
+      if (ret < 0)
+        ret = errno;
+      if (!*buf)
+        {
+          /* glibc 2.13 would not touch buf on err, so we have to fall
+             back to GNU strerror_r which always returns a thread-safe
+             untruncated string to (partially) copy into our buf.  */
+          safe_copy (buf, buflen, strerror_r (errnum, buf, buflen));
+        }
+    }
+
+#elif USE_SYSTEM_STRERROR_R
+
+    if (buflen > INT_MAX)
+      buflen = INT_MAX;
+
+# ifdef __hpux
+    /* On HP-UX 11.31, strerror_r always fails when buflen < 80; it
+       also fails to change buf on EINVAL.  */
+    {
+      char stackbuf[80];
+
+      if (buflen < sizeof stackbuf)
+        {
+          ret = strerror_r (errnum, stackbuf, sizeof stackbuf);
+          if (ret == 0)
+            ret = safe_copy (buf, buflen, stackbuf);
+        }
+      else
+        ret = strerror_r (errnum, buf, buflen);
+    }
+# else
+    ret = strerror_r (errnum, buf, buflen);
+
+    /* Some old implementations may return (-1, EINVAL) instead of EINVAL.
+       But on Haiku, valid error numbers are negative.  */
+#  if !defined __HAIKU__
+    if (ret < 0)
+      ret = errno;
+#  endif
+# endif
+
+# if defined _AIX || defined __HAIKU__
+    /* AIX and Haiku return 0 rather than ERANGE when truncating strings; try
+       again until we are sure we got the entire string.  */
+    if (!ret && strlen (buf) == buflen - 1)
+      {
+        char stackbuf[STACKBUF_LEN];
+        size_t len;
+        strerror_r (errnum, stackbuf, sizeof stackbuf);
+        len = strlen (stackbuf);
+        /* STACKBUF_LEN should have been large enough.  */
+        if (len + 1 == sizeof stackbuf)
+          abort ();
+        if (buflen <= len)
+          ret = ERANGE;
+      }
+# else
+    /* Solaris 10 does not populate buf on ERANGE.  OpenBSD 4.7
+       truncates early on ERANGE rather than return a partial integer.
+       We prefer the maximal string.  We set buf[0] earlier, and we
+       know of no implementation that modifies buf to be an
+       unterminated string, so this strlen should be portable in
+       practice (rather than pulling in a safer strnlen).  */
+    if (ret == ERANGE && strlen (buf) < buflen - 1)
+      {
+        char stackbuf[STACKBUF_LEN];
+
+        /* STACKBUF_LEN should have been large enough.  */
+        if (strerror_r (errnum, stackbuf, sizeof stackbuf) == ERANGE)
+          abort ();
+        safe_copy (buf, buflen, stackbuf);
+      }
+# endif
+
+#else /* USE_SYSTEM_STRERROR */
+
+    /* Try to do what strerror (errnum) does, but without clobbering the
+       buffer used by strerror().  */
+
+# if defined __NetBSD__ || defined __hpux || (defined _WIN32 && !defined __CYGWIN__) || defined __CYGWIN__ /* NetBSD, HP-UX, native Windows, Cygwin */
+
+    /* NetBSD:         sys_nerr, sys_errlist are declared through _NETBSD_SOURCE
+                       and <errno.h> above.
+       HP-UX:          sys_nerr, sys_errlist are declared explicitly above.
+       native Windows: sys_nerr, sys_errlist are declared in <stdlib.h>.
+       Cygwin:         sys_nerr, sys_errlist are declared in <errno.h>.  */
+    if (errnum >= 0 && errnum < sys_nerr)
+      {
+#  if HAVE_CATGETS && (defined __NetBSD__ || defined __hpux)
+#   if defined __NetBSD__
+        nl_catd catd = catopen ("libc", NL_CAT_LOCALE);
+        const char *errmsg =
+          (catd != (nl_catd)-1
+           ? catgets (catd, 1, errnum, sys_errlist[errnum])
+           : sys_errlist[errnum]);
+#   endif
+#   if defined __hpux
+        nl_catd catd = catopen ("perror", NL_CAT_LOCALE);
+        const char *errmsg =
+          (catd != (nl_catd)-1
+           ? catgets (catd, 1, 1 + errnum, sys_errlist[errnum])
+           : sys_errlist[errnum]);
+#   endif
+#  else
+        const char *errmsg = sys_errlist[errnum];
+#  endif
+        if (errmsg == NULL || *errmsg == '\0')
+          ret = EINVAL;
+        else
+          ret = safe_copy (buf, buflen, errmsg);
+#  if HAVE_CATGETS && (defined __NetBSD__ || defined __hpux)
+        if (catd != (nl_catd)-1)
+          catclose (catd);
+#  endif
+      }
+    else
+      ret = EINVAL;
+
+# elif defined __sgi || (defined __sun && !defined _LP64) /* IRIX, Solaris <= 9 32-bit */
+
+    /* For a valid error number, the system's strerror() function returns
+       a pointer to a not copied string, not to a buffer.  */
+    if (errnum >= 0 && errnum < sys_nerr)
+      {
+        char *errmsg = strerror (errnum);
+
+        if (errmsg == NULL || *errmsg == '\0')
+          ret = EINVAL;
+        else
+          ret = safe_copy (buf, buflen, errmsg);
+      }
+    else
+      ret = EINVAL;
+
+# else
+
+    gl_lock_lock (strerror_lock);
+
+    {
+      char *errmsg = strerror (errnum);
+
+      /* For invalid error numbers, strerror() on
+           - IRIX 6.5 returns NULL,
+           - HP-UX 11 returns an empty string.  */
+      if (errmsg == NULL || *errmsg == '\0')
+        ret = EINVAL;
+      else
+        ret = safe_copy (buf, buflen, errmsg);
+    }
+
+    gl_lock_unlock (strerror_lock);
+
+# endif
+
+#endif
+
+#if defined _WIN32 && !defined __CYGWIN__
+    /* MSVC 14 defines names for many error codes in the range 100..140,
+       but _sys_errlist contains strings only for the error codes
+       < _sys_nerr = 43.  */
+    if (ret == EINVAL)
+      {
+        const char *errmsg;
+
+        switch (errnum)
+          {
+          case 100 /* EADDRINUSE */:
+            errmsg = "Address already in use";
+            break;
+          case 101 /* EADDRNOTAVAIL */:
+            errmsg = "Cannot assign requested address";
+            break;
+          case 102 /* EAFNOSUPPORT */:
+            errmsg = "Address family not supported by protocol";
+            break;
+          case 103 /* EALREADY */:
+            errmsg = "Operation already in progress";
+            break;
+          case 105 /* ECANCELED */:
+            errmsg = "Operation canceled";
+            break;
+          case 106 /* ECONNABORTED */:
+            errmsg = "Software caused connection abort";
+            break;
+          case 107 /* ECONNREFUSED */:
+            errmsg = "Connection refused";
+            break;
+          case 108 /* ECONNRESET */:
+            errmsg = "Connection reset by peer";
+            break;
+          case 109 /* EDESTADDRREQ */:
+            errmsg = "Destination address required";
+            break;
+          case 110 /* EHOSTUNREACH */:
+            errmsg = "No route to host";
+            break;
+          case 112 /* EINPROGRESS */:
+            errmsg = "Operation now in progress";
+            break;
+          case 113 /* EISCONN */:
+            errmsg = "Transport endpoint is already connected";
+            break;
+          case 114 /* ELOOP */:
+            errmsg = "Too many levels of symbolic links";
+            break;
+          case 115 /* EMSGSIZE */:
+            errmsg = "Message too long";
+            break;
+          case 116 /* ENETDOWN */:
+            errmsg = "Network is down";
+            break;
+          case 117 /* ENETRESET */:
+            errmsg = "Network dropped connection on reset";
+            break;
+          case 118 /* ENETUNREACH */:
+            errmsg = "Network is unreachable";
+            break;
+          case 119 /* ENOBUFS */:
+            errmsg = "No buffer space available";
+            break;
+          case 123 /* ENOPROTOOPT */:
+            errmsg = "Protocol not available";
+            break;
+          case 126 /* ENOTCONN */:
+            errmsg = "Transport endpoint is not connected";
+            break;
+          case 128 /* ENOTSOCK */:
+            errmsg = "Socket operation on non-socket";
+            break;
+          case 129 /* ENOTSUP */:
+            errmsg = "Not supported";
+            break;
+          case 130 /* EOPNOTSUPP */:
+            errmsg = "Operation not supported";
+            break;
+          case 132 /* EOVERFLOW */:
+            errmsg = "Value too large for defined data type";
+            break;
+          case 133 /* EOWNERDEAD */:
+            errmsg = "Owner died";
+            break;
+          case 134 /* EPROTO */:
+            errmsg = "Protocol error";
+            break;
+          case 135 /* EPROTONOSUPPORT */:
+            errmsg = "Protocol not supported";
+            break;
+          case 136 /* EPROTOTYPE */:
+            errmsg = "Protocol wrong type for socket";
+            break;
+          case 138 /* ETIMEDOUT */:
+            errmsg = "Connection timed out";
+            break;
+          case 140 /* EWOULDBLOCK */:
+            errmsg = "Operation would block";
+            break;
+          default:
+            errmsg = NULL;
+            break;
+          }
+        if (errmsg != NULL)
+          ret = safe_copy (buf, buflen, errmsg);
+      }
+#endif
+
+    if (ret == EINVAL && !*buf)
+      {
+#if defined __HAIKU__
+        /* For consistency with perror().  */
+        snprintf (buf, buflen, "Unknown Application Error (%d)", errnum);
+#else
+        snprintf (buf, buflen, "Unknown error %d", errnum);
+#endif
+      }
+
+    errno = saved_errno;
+    return ret;
+  }
+}
diff --git a/src/gl/tests/strtol.c b/src/gl/tests/strtol.c
new file mode 100644
index 0000000..c904482
--- /dev/null
+++ b/src/gl/tests/strtol.c
@@ -0,0 +1,408 @@
+/* Convert string representation of a number into an integer value.
+
+   Copyright (C) 1991-1992, 1994-1999, 2003, 2005-2007, 2009-2021 Free Software
+   Foundation, Inc.
+
+   NOTE: The canonical source of this file is maintained with the GNU C
+   Library.  Bugs can be reported to bug-glibc@gnu.org.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 3 of the License, or any
+   later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifdef _LIBC
+# define USE_NUMBER_GROUPING
+#else
+# include <config.h>
+#endif
+
+#include <ctype.h>
+#include <errno.h>
+#ifndef __set_errno
+# define __set_errno(Val) errno = (Val)
+#endif
+
+#include <limits.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef USE_NUMBER_GROUPING
+# include "../locale/localeinfo.h"
+#endif
+
+/* Nonzero if we are defining 'strtoul' or 'strtoull', operating on
+   unsigned integers.  */
+#ifndef UNSIGNED
+# define UNSIGNED 0
+# define INT LONG int
+#else
+# define INT unsigned LONG int
+#endif
+
+/* Determine the name.  */
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# undef strtol
+# if UNSIGNED
+#  ifdef USE_WIDE_CHAR
+#   ifdef QUAD
+#    define strtol __wcstoull_l
+#   else
+#    define strtol __wcstoul_l
+#   endif
+#  else
+#   ifdef QUAD
+#    define strtol __strtoull_l
+#   else
+#    define strtol __strtoul_l
+#   endif
+#  endif
+# else
+#  ifdef USE_WIDE_CHAR
+#   ifdef QUAD
+#    define strtol __wcstoll_l
+#   else
+#    define strtol __wcstol_l
+#   endif
+#  else
+#   ifdef QUAD
+#    define strtol __strtoll_l
+#   else
+#    define strtol __strtol_l
+#   endif
+#  endif
+# endif
+#else
+# if UNSIGNED
+#  undef strtol
+#  ifdef USE_WIDE_CHAR
+#   ifdef QUAD
+#    define strtol wcstoull
+#   else
+#    define strtol wcstoul
+#   endif
+#  else
+#   ifdef QUAD
+#    define strtol strtoull
+#   else
+#    define strtol strtoul
+#   endif
+#  endif
+# else
+#  ifdef USE_WIDE_CHAR
+#   undef strtol
+#   ifdef QUAD
+#    define strtol wcstoll
+#   else
+#    define strtol wcstol
+#   endif
+#  else
+#   ifdef QUAD
+#    undef strtol
+#    define strtol strtoll
+#   endif
+#  endif
+# endif
+#endif
+
+/* If QUAD is defined, we are defining 'strtoll' or 'strtoull',
+   operating on 'long long int's.  */
+#ifdef QUAD
+# define LONG long long
+# define STRTOL_LONG_MIN LLONG_MIN
+# define STRTOL_LONG_MAX LLONG_MAX
+# define STRTOL_ULONG_MAX ULLONG_MAX
+# if __GNUC__ == 2 && __GNUC_MINOR__ < 7
+   /* Work around gcc bug with using this constant.  */
+   static const unsigned long long int maxquad = ULLONG_MAX;
+#  undef STRTOL_ULONG_MAX
+#  define STRTOL_ULONG_MAX maxquad
+# endif
+#else
+# define LONG long
+# define STRTOL_LONG_MIN LONG_MIN
+# define STRTOL_LONG_MAX LONG_MAX
+# define STRTOL_ULONG_MAX ULONG_MAX
+#endif
+
+
+#ifdef USE_NUMBER_GROUPING
+# define GROUP_PARAM_PROTO , int group
+#else
+# define GROUP_PARAM_PROTO
+#endif
+
+/* We use this code also for the extended locale handling where the
+   function gets as an additional argument the locale which has to be
+   used.  To access the values we have to redefine the _NL_CURRENT
+   macro.  */
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# undef _NL_CURRENT
+# define _NL_CURRENT(category, item) \
+  (current->values[_NL_ITEM_INDEX (item)].string)
+# define LOCALE_PARAM , loc
+# define LOCALE_PARAM_PROTO , __locale_t loc
+#else
+# define LOCALE_PARAM
+# define LOCALE_PARAM_PROTO
+#endif
+
+#ifdef USE_WIDE_CHAR
+# include <wchar.h>
+# include <wctype.h>
+# define L_(Ch) L##Ch
+# define UCHAR_TYPE wint_t
+# define STRING_TYPE wchar_t
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+#  define ISSPACE(Ch) __iswspace_l ((Ch), loc)
+#  define ISALPHA(Ch) __iswalpha_l ((Ch), loc)
+#  define TOUPPER(Ch) __towupper_l ((Ch), loc)
+# else
+#  define ISSPACE(Ch) iswspace (Ch)
+#  define ISALPHA(Ch) iswalpha (Ch)
+#  define TOUPPER(Ch) towupper (Ch)
+# endif
+#else
+# define L_(Ch) Ch
+# define UCHAR_TYPE unsigned char
+# define STRING_TYPE char
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+#  define ISSPACE(Ch) __isspace_l ((unsigned char) (Ch), loc)
+#  define ISALPHA(Ch) __isalpha_l ((unsigned char) (Ch), loc)
+#  define TOUPPER(Ch) __toupper_l ((unsigned char) (Ch), loc)
+# else
+#  define ISSPACE(Ch) isspace ((unsigned char) (Ch))
+#  define ISALPHA(Ch) isalpha ((unsigned char) (Ch))
+#  define TOUPPER(Ch) toupper ((unsigned char) (Ch))
+# endif
+#endif
+
+#ifdef USE_NUMBER_GROUPING
+# define INTERNAL(X) INTERNAL1(X)
+# define INTERNAL1(X) __##X##_internal
+# define WEAKNAME(X) WEAKNAME1(X)
+#else
+# define INTERNAL(X) X
+#endif
+
+#ifdef USE_NUMBER_GROUPING
+/* This file defines a function to check for correct grouping.  */
+# include "grouping.h"
+#endif
+
+
+
+/* Convert NPTR to an 'unsigned long int' or 'long int' in base BASE.
+   If BASE is 0 the base is determined by the presence of a leading
+   zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal.
+   If BASE is < 2 or > 36, it is reset to 10.
+   If ENDPTR is not NULL, a pointer to the character after the last
+   one converted is stored in *ENDPTR.  */
+
+INT
+INTERNAL (strtol) (const STRING_TYPE *nptr, STRING_TYPE **endptr,
+                   int base GROUP_PARAM_PROTO LOCALE_PARAM_PROTO)
+{
+  int negative;
+  register unsigned LONG int cutoff;
+  register unsigned int cutlim;
+  register unsigned LONG int i;
+  register const STRING_TYPE *s;
+  register UCHAR_TYPE c;
+  const STRING_TYPE *save, *end;
+  int overflow;
+
+#ifdef USE_NUMBER_GROUPING
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+  struct locale_data *current = loc->__locales[LC_NUMERIC];
+# endif
+  /* The thousands character of the current locale.  */
+  wchar_t thousands = L'\0';
+  /* The numeric grouping specification of the current locale,
+     in the format described in <locale.h>.  */
+  const char *grouping;
+
+  if (group)
+    {
+      grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
+      if (*grouping <= 0 || *grouping == CHAR_MAX)
+        grouping = NULL;
+      else
+        {
+          /* Figure out the thousands separator character.  */
+# if defined _LIBC || defined _HAVE_BTOWC
+          thousands = __btowc (*_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP));
+          if (thousands == WEOF)
+            thousands = L'\0';
+# endif
+          if (thousands == L'\0')
+            grouping = NULL;
+        }
+    }
+  else
+    grouping = NULL;
+#endif
+
+  if (base < 0 || base == 1 || base > 36)
+    {
+      __set_errno (EINVAL);
+      return 0;
+    }
+
+  save = s = nptr;
+
+  /* Skip white space.  */
+  while (ISSPACE (*s))
+    ++s;
+  if (*s == L_('\0'))
+    goto noconv;
+
+  /* Check for a sign.  */
+  if (*s == L_('-'))
+    {
+      negative = 1;
+      ++s;
+    }
+  else if (*s == L_('+'))
+    {
+      negative = 0;
+      ++s;
+    }
+  else
+    negative = 0;
+
+  /* Recognize number prefix and if BASE is zero, figure it out ourselves.  */
+  if (*s == L_('0'))
+    {
+      if ((base == 0 || base == 16) && TOUPPER (s[1]) == L_('X'))
+        {
+          s += 2;
+          base = 16;
+        }
+      else if (base == 0)
+        base = 8;
+    }
+  else if (base == 0)
+    base = 10;
+
+  /* Save the pointer so we can check later if anything happened.  */
+  save = s;
+
+#ifdef USE_NUMBER_GROUPING
+  if (group)
+    {
+      /* Find the end of the digit string and check its grouping.  */
+      end = s;
+      for (c = *end; c != L_('\0'); c = *++end)
+        if ((wchar_t) c != thousands
+            && ((wchar_t) c < L_('0') || (wchar_t) c > L_('9'))
+            && (!ISALPHA (c) || (int) (TOUPPER (c) - L_('A') + 10) >= base))
+          break;
+      if (*s == thousands)
+        end = s;
+      else
+        end = correctly_grouped_prefix (s, end, thousands, grouping);
+    }
+  else
+#endif
+    end = NULL;
+
+  cutoff = STRTOL_ULONG_MAX / (unsigned LONG int) base;
+  cutlim = STRTOL_ULONG_MAX % (unsigned LONG int) base;
+
+  overflow = 0;
+  i = 0;
+  for (c = *s; c != L_('\0'); c = *++s)
+    {
+      if (s == end)
+        break;
+      if (c >= L_('0') && c <= L_('9'))
+        c -= L_('0');
+      else if (ISALPHA (c))
+        c = TOUPPER (c) - L_('A') + 10;
+      else
+        break;
+      if ((int) c >= base)
+        break;
+      /* Check for overflow.  */
+      if (i > cutoff || (i == cutoff && c > cutlim))
+        overflow = 1;
+      else
+        {
+          i *= (unsigned LONG int) base;
+          i += c;
+        }
+    }
+
+  /* Check if anything actually happened.  */
+  if (s == save)
+    goto noconv;
+
+  /* Store in ENDPTR the address of one character
+     past the last character we converted.  */
+  if (endptr != NULL)
+    *endptr = (STRING_TYPE *) s;
+
+#if !UNSIGNED
+  /* Check for a value that is within the range of
+     'unsigned LONG int', but outside the range of 'LONG int'.  */
+  if (overflow == 0
+      && i > (negative
+              ? -((unsigned LONG int) (STRTOL_LONG_MIN + 1)) + 1
+              : (unsigned LONG int) STRTOL_LONG_MAX))
+    overflow = 1;
+#endif
+
+  if (overflow)
+    {
+      __set_errno (ERANGE);
+#if UNSIGNED
+      return STRTOL_ULONG_MAX;
+#else
+      return negative ? STRTOL_LONG_MIN : STRTOL_LONG_MAX;
+#endif
+    }
+
+  /* Return the result of the appropriate sign.  */
+  return negative ? -i : i;
+
+noconv:
+  /* We must handle a special case here: the base is 0 or 16 and the
+     first two characters are '0' and 'x', but the rest are no
+     hexadecimal digits.  This is no error case.  We return 0 and
+     ENDPTR points to the 'x'.  */
+  if (endptr != NULL)
+    {
+      if (save - nptr >= 2 && TOUPPER (save[-1]) == L_('X')
+          && save[-2] == L_('0'))
+        *endptr = (STRING_TYPE *) &save[-1];
+      else
+        /*  There was no number to convert.  */
+        *endptr = (STRING_TYPE *) nptr;
+    }
+
+  return 0L;
+}
+
+#ifdef USE_NUMBER_GROUPING
+/* External user entry point.  */
+
+INT
+# ifdef weak_function
+weak_function
+# endif
+strtol (const STRING_TYPE *nptr, STRING_TYPE **endptr,
+        int base LOCALE_PARAM_PROTO)
+{
+  return INTERNAL (strtol) (nptr, endptr, base, 0 LOCALE_PARAM);
+}
+#endif
diff --git a/src/gl/tests/strtoll.c b/src/gl/tests/strtoll.c
new file mode 100644
index 0000000..30daefc
--- /dev/null
+++ b/src/gl/tests/strtoll.c
@@ -0,0 +1,33 @@
+/* Function to parse a 'long long int' from text.
+   Copyright (C) 1995-1997, 1999, 2001, 2009-2021 Free Software Foundation,
+   Inc.
+   This file is part of the GNU C Library.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#define QUAD    1
+
+#include <strtol.c>
+
+#ifdef _LIBC
+# ifdef SHARED
+#  include <shlib-compat.h>
+
+#  if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
+compat_symbol (libc, __strtoll_internal, __strtoq_internal, GLIBC_2_0);
+#  endif
+
+# endif
+weak_alias (strtoll, strtoq)
+#endif
diff --git a/src/gl/tests/symlink.c b/src/gl/tests/symlink.c
new file mode 100644
index 0000000..2f6c0d4
--- /dev/null
+++ b/src/gl/tests/symlink.c
@@ -0,0 +1,57 @@
+/* Stub for symlink().
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+
+
+#if HAVE_SYMLINK
+
+# undef symlink
+
+/* Create a symlink, but reject trailing slash.  */
+int
+rpl_symlink (char const *contents, char const *name)
+{
+  size_t len = strlen (name);
+  if (len && name[len - 1] == '/')
+    {
+      struct stat st;
+      if (lstat (name, &st) == 0 || errno == EOVERFLOW)
+        errno = EEXIST;
+      return -1;
+    }
+  return symlink (contents, name);
+}
+
+#else /* !HAVE_SYMLINK */
+
+/* The system does not support symlinks.  */
+int
+symlink (char const *contents _GL_UNUSED,
+         char const *name _GL_UNUSED)
+{
+  errno = ENOSYS;
+  return -1;
+}
+
+#endif /* !HAVE_SYMLINK */
diff --git a/src/gl/tests/sys_ioctl.in.h b/src/gl/tests/sys_ioctl.in.h
new file mode 100644
index 0000000..12c2cce
--- /dev/null
+++ b/src/gl/tests/sys_ioctl.in.h
@@ -0,0 +1,79 @@
+/* Substitute for and wrapper around <sys/ioctl.h>.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_SYS_IOCTL_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#if @HAVE_SYS_IOCTL_H@
+# @INCLUDE_NEXT@ @NEXT_SYS_IOCTL_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_SYS_IOCTL_H
+#define _@GUARD_PREFIX@_SYS_IOCTL_H
+
+/* AIX 5.1 and Solaris 10 declare ioctl() in <unistd.h> and in <stropts.h>,
+   but not in <sys/ioctl.h>.
+   Haiku declares ioctl() in <unistd.h>, but not in <sys/ioctl.h>.
+   But avoid namespace pollution on glibc systems.  */
+#ifndef __GLIBC__
+# include <unistd.h>
+#endif
+
+/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
+
+/* The definition of _GL_WARN_ON_USE is copied here.  */
+
+
+/* Declare overridden functions.  */
+
+#if @GNULIB_IOCTL@
+# if @REPLACE_IOCTL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ioctl
+#   define ioctl rpl_ioctl
+#  endif
+_GL_FUNCDECL_RPL (ioctl, int,
+                  (int fd, int request, ... /* {void *,char *} arg */));
+_GL_CXXALIAS_RPL (ioctl, int,
+                  (int fd, int request, ... /* {void *,char *} arg */));
+# else
+#  if @SYS_IOCTL_H_HAVE_WINSOCK2_H@ || 1
+_GL_FUNCDECL_SYS (ioctl, int,
+                  (int fd, int request, ... /* {void *,char *} arg */));
+#  endif
+_GL_CXXALIAS_SYS (ioctl, int,
+                  (int fd, int request, ... /* {void *,char *} arg */));
+# endif
+_GL_CXXALIASWARN (ioctl);
+#elif @SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
+# undef ioctl
+# define ioctl ioctl_used_without_requesting_gnulib_module_ioctl
+#elif defined GNULIB_POSIXCHECK
+# undef ioctl
+# if HAVE_RAW_DECL_IOCTL
+_GL_WARN_ON_USE (ioctl, "ioctl does not portably work on sockets - "
+                 "use gnulib module ioctl for portability");
+# endif
+#endif
+
+
+#endif /* _@GUARD_PREFIX@_SYS_IOCTL_H */
+#endif /* _@GUARD_PREFIX@_SYS_IOCTL_H */
diff --git a/src/gl/tests/test-accept.c b/src/gl/tests/test-accept.c
new file mode 100644
index 0000000..49b87b1
--- /dev/null
+++ b/src/gl/tests/test-accept.c
@@ -0,0 +1,56 @@
+/* Test accepting a connection to a server socket.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (accept, int, (int, struct sockaddr *, socklen_t *));
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct sockaddr_in addr;
+    socklen_t addrlen = sizeof (addr);
+
+    errno = 0;
+    ASSERT (accept (-1, (struct sockaddr *) &addr, &addrlen) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    struct sockaddr_in addr;
+    socklen_t addrlen = sizeof (addr);
+
+    close (99);
+    errno = 0;
+    ASSERT (accept (99, (struct sockaddr *) &addr, &addrlen) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-alloca-opt.c b/src/gl/tests/test-alloca-opt.c
new file mode 100644
index 0000000..fdbf6f5
--- /dev/null
+++ b/src/gl/tests/test-alloca-opt.c
@@ -0,0 +1,62 @@
+/* Test of optional automatic memory allocation.
+   Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <alloca.h>
+
+#if HAVE_ALLOCA
+
+static void
+do_allocation (int n)
+{
+  void *volatile ptr = alloca (n);
+  (void) ptr;
+}
+
+void (*func) (int) = do_allocation;
+
+#endif
+
+int
+main ()
+{
+#if HAVE_ALLOCA
+  int i;
+
+  /* Repeat a lot of times, to make sure there's no memory leak.  */
+  for (i = 0; i < 100000; i++)
+    {
+      /* Try various values.
+         n = 0 gave a crash on Alpha with gcc-2.5.8.
+         Some versions of Mac OS X have a stack size limit of 512 KB.  */
+      func (34);
+      func (134);
+      func (399);
+      func (510823);
+      func (129321);
+      func (0);
+      func (4070);
+      func (4095);
+      func (1);
+      func (16582);
+    }
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-arpa_inet.c b/src/gl/tests/test-arpa_inet.c
new file mode 100644
index 0000000..10a27e1
--- /dev/null
+++ b/src/gl/tests/test-arpa_inet.c
@@ -0,0 +1,27 @@
+/* Test of <arpa/inet.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <arpa/inet.h>
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-array_list.c b/src/gl/tests/test-array_list.c
new file mode 100644
index 0000000..fa60691
--- /dev/null
+++ b/src/gl/tests/test-array_list.c
@@ -0,0 +1,381 @@
+/* Test of sequential list data type implementation.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2007.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "gl_array_list.h"
+
+#include <stdlib.h>
+
+#include "macros.h"
+
+static const char *objects[15] =
+  {
+    "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o"
+  };
+
+#define RANDOM(n) (rand () % (n))
+#define RANDOM_OBJECT() objects[RANDOM (SIZEOF (objects))]
+
+static void
+check_equals (gl_list_t list1, gl_list_t list2)
+{
+  size_t n, i;
+
+  n = gl_list_size (list1);
+  ASSERT (n == gl_list_size (list2));
+  for (i = 0; i < n; i++)
+    {
+      ASSERT (gl_list_get_at (list1, i) == gl_list_get_at (list2, i));
+    }
+}
+
+static void
+check_equals_by_forward_iteration (gl_list_t list1, gl_list_t list2)
+{
+  size_t n = gl_list_size (list1);
+  size_t i;
+  gl_list_node_t node2;
+
+  i = 0;
+  node2 = gl_list_first_node (list2);
+  while (i < n && node2 != NULL)
+    {
+      ASSERT (gl_list_get_at (list1, i) == gl_list_node_value (list2, node2));
+      i++;
+      node2 = gl_list_next_node (list2, node2);
+    }
+  ASSERT ((i == n) == (node2 == NULL));
+}
+
+static void
+check_equals_by_backward_iteration (gl_list_t list1, gl_list_t list2)
+{
+  size_t n = gl_list_size (list1);
+  size_t i;
+  gl_list_node_t node2;
+
+  i = n - 1;
+  node2 = gl_list_last_node (list2);
+  while (i != (size_t)(-1) && node2 != NULL)
+    {
+      ASSERT (gl_list_get_at (list1, i) == gl_list_node_value (list2, node2));
+      i--;
+      node2 = gl_list_previous_node (list2, node2);
+    }
+  ASSERT ((i == (size_t)(-1)) == (node2 == NULL));
+}
+
+int
+main (int argc, char *argv[])
+{
+  gl_list_t list1, list2;
+
+  /* Allow the user to provide a non-default random seed on the command line.  */
+  if (argc > 1)
+    srand (atoi (argv[1]));
+
+  {
+    size_t initial_size = RANDOM (50);
+    const void **contents =
+      (const void **) malloc (initial_size * sizeof (const void *));
+    size_t i;
+    unsigned int repeat;
+
+    for (i = 0; i < initial_size; i++)
+      contents[i] = RANDOM_OBJECT ();
+
+    /* Create list1.  */
+    list1 = gl_list_nx_create (GL_ARRAY_LIST, NULL, NULL, NULL, true,
+                               initial_size, contents);
+    ASSERT (list1 != NULL);
+    /* Create list2.  */
+    list2 = gl_list_nx_create_empty (GL_ARRAY_LIST, NULL, NULL, NULL, true);
+    ASSERT (list2 != NULL);
+    for (i = 0; i < initial_size; i++)
+      ASSERT (gl_list_nx_add_last (list2, contents[i]) != NULL);
+
+    check_equals (list1, list2);
+
+    check_equals_by_forward_iteration (list1, list2);
+    check_equals_by_backward_iteration (list1, list2);
+
+    for (repeat = 0; repeat < 10000; repeat++)
+      {
+        unsigned int operation = RANDOM (18);
+        switch (operation)
+          {
+          case 0:
+            if (gl_list_size (list1) > 0)
+              {
+                size_t index = RANDOM (gl_list_size (list1));
+                const char *obj = RANDOM_OBJECT ();
+                gl_list_node_t node1, node2;
+
+                node1 = gl_list_nx_set_at (list1, index, obj);
+                ASSERT (node1 != NULL);
+                ASSERT (gl_list_get_at (list1, index) == obj);
+                ASSERT (gl_list_node_value (list1, node1) == obj);
+
+                node2 = gl_list_nx_set_at (list2, index, obj);
+                ASSERT (node2 != NULL);
+                ASSERT (gl_list_get_at (list2, index) == obj);
+                ASSERT (gl_list_node_value (list2, node2) == obj);
+
+                if (index > 0)
+                  {
+                    ASSERT (gl_list_node_value (list1, gl_list_previous_node (list1, node1))
+                            == gl_list_get_at (list1, index - 1));
+                  }
+                if (index + 1 < gl_list_size (list1))
+                  {
+                    ASSERT (gl_list_node_value (list1, gl_list_next_node (list1, node1))
+                            == gl_list_get_at (list1, index + 1));
+                  }
+              }
+            break;
+          case 1:
+            {
+              const char *obj = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2;
+              node1 = gl_list_search (list1, obj);
+              node2 = gl_list_search (list2, obj);
+              if (node1 == NULL)
+                {
+                  ASSERT (node2 == NULL);
+                }
+              else
+                {
+                  ASSERT (node2 != NULL);
+                  ASSERT (gl_list_node_value (list1, node1) == obj);
+                  ASSERT (gl_list_node_value (list2, node2) == obj);
+                }
+            }
+            break;
+          case 2:
+            {
+              const char *obj = RANDOM_OBJECT ();
+              size_t index1, index2;
+              index1 = gl_list_indexof (list1, obj);
+              index2 = gl_list_indexof (list2, obj);
+              if (index1 == (size_t)(-1))
+                {
+                  ASSERT (index2 == (size_t)(-1));
+                }
+              else
+                {
+                  ASSERT (index2 != (size_t)(-1));
+                  ASSERT (gl_list_get_at (list1, index1) == obj);
+                  ASSERT (gl_list_get_at (list2, index2) == obj);
+                  ASSERT (index2 == index1);
+                }
+            }
+            break;
+          case 3: /* add 1 element */
+            {
+              const char *obj = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2;
+              node1 = gl_list_nx_add_first (list1, obj);
+              ASSERT (node1 != NULL);
+              node2 = gl_list_nx_add_first (list2, obj);
+              ASSERT (node2 != NULL);
+              ASSERT (gl_list_node_value (list1, node1) == obj);
+              ASSERT (gl_list_node_value (list2, node2) == obj);
+              ASSERT (gl_list_get_at (list1, 0) == obj);
+              ASSERT (gl_list_get_at (list2, 0) == obj);
+            }
+            break;
+          case 4: /* add 1 element */
+            {
+              const char *obj = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2;
+              node1 = gl_list_nx_add_last (list1, obj);
+              ASSERT (node1 != NULL);
+              node2 = gl_list_nx_add_last (list2, obj);
+              ASSERT (node2 != NULL);
+              ASSERT (gl_list_node_value (list1, node1) == obj);
+              ASSERT (gl_list_node_value (list2, node2) == obj);
+              ASSERT (gl_list_get_at (list1, gl_list_size (list1) - 1) == obj);
+              ASSERT (gl_list_get_at (list2, gl_list_size (list2) - 1) == obj);
+            }
+            break;
+          case 5: /* add 3 elements */
+            {
+              const char *obj0 = RANDOM_OBJECT ();
+              const char *obj1 = RANDOM_OBJECT ();
+              const char *obj2 = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2;
+              node1 = gl_list_nx_add_first (list1, obj2);
+              ASSERT (node1 != NULL);
+              node1 = gl_list_nx_add_before (list1, node1, obj0);
+              ASSERT (node1 != NULL);
+              node1 = gl_list_nx_add_after (list1, node1, obj1);
+              ASSERT (node1 != NULL);
+              node2 = gl_list_nx_add_first (list2, obj2);
+              ASSERT (node2 != NULL);
+              node2 = gl_list_nx_add_before (list2, node2, obj0);
+              ASSERT (node2 != NULL);
+              node2 = gl_list_nx_add_after (list2, node2, obj1);
+              ASSERT (node2 != NULL);
+              ASSERT (gl_list_node_value (list1, node1) == obj1);
+              ASSERT (gl_list_node_value (list2, node2) == obj1);
+              ASSERT (gl_list_get_at (list1, 0) == obj0);
+              ASSERT (gl_list_get_at (list1, 1) == obj1);
+              ASSERT (gl_list_get_at (list1, 2) == obj2);
+              ASSERT (gl_list_get_at (list2, 0) == obj0);
+              ASSERT (gl_list_get_at (list2, 1) == obj1);
+              ASSERT (gl_list_get_at (list2, 2) == obj2);
+            }
+            break;
+          case 6: /* add 1 element */
+            {
+              size_t index = RANDOM (gl_list_size (list1) + 1);
+              const char *obj = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2;
+              node1 = gl_list_nx_add_at (list1, index, obj);
+              ASSERT (node1 != NULL);
+              node2 = gl_list_nx_add_at (list2, index, obj);
+              ASSERT (node2 != NULL);
+              ASSERT (gl_list_get_at (list1, index) == obj);
+              ASSERT (gl_list_node_value (list1, node1) == obj);
+              ASSERT (gl_list_get_at (list2, index) == obj);
+              ASSERT (gl_list_node_value (list2, node2) == obj);
+              if (index > 0)
+                {
+                  ASSERT (gl_list_node_value (list1, gl_list_previous_node (list1, node1))
+                          == gl_list_get_at (list1, index - 1));
+                }
+              if (index + 1 < gl_list_size (list1))
+                {
+                  ASSERT (gl_list_node_value (list1, gl_list_next_node (list1, node1))
+                          == gl_list_get_at (list1, index + 1));
+                }
+            }
+            break;
+          case 7: case 8: /* remove 1 element */
+            if (gl_list_size (list1) > 0)
+              {
+                size_t n = gl_list_size (list1);
+                const char *obj = gl_list_get_at (list1, RANDOM (n));
+                gl_list_node_t node1, node2;
+                node1 = gl_list_search (list1, obj);
+                node2 = gl_list_search (list2, obj);
+                ASSERT (node1 != NULL);
+                ASSERT (node2 != NULL);
+                ASSERT (gl_list_remove_node (list1, node1));
+                ASSERT (gl_list_remove_node (list2, node2));
+                ASSERT (gl_list_size (list1) == n - 1);
+              }
+            break;
+          case 9: case 10: /* remove 1 element */
+            if (gl_list_size (list1) > 0)
+              {
+                size_t n = gl_list_size (list1);
+                size_t index = RANDOM (n);
+                ASSERT (gl_list_remove_at (list1, index));
+                ASSERT (gl_list_remove_at (list2, index));
+                ASSERT (gl_list_size (list1) == n - 1);
+              }
+            break;
+          case 11: /* remove first element */
+            {
+              size_t n = gl_list_size (list1);
+              bool removed1 = gl_list_remove_first (list1);
+              ASSERT (gl_list_remove_first (list2) == removed1);
+              ASSERT (gl_list_size (list1) == n - (int) removed1);
+            }
+            break;
+          case 12: /* remove last element */
+            {
+              size_t n = gl_list_size (list1);
+              bool removed1 = gl_list_remove_last (list1);
+              ASSERT (gl_list_remove_last (list2) == removed1);
+              ASSERT (gl_list_size (list1) == n - (int) removed1);
+            }
+            break;
+          case 13: case 14: /* remove 1 element */
+            if (gl_list_size (list1) > 0)
+              {
+                size_t n = gl_list_size (list1);
+                const char *obj = gl_list_get_at (list1, RANDOM (n));
+                ASSERT (gl_list_remove (list1, obj));
+                ASSERT (gl_list_remove (list2, obj));
+                ASSERT (gl_list_size (list1) == n - 1);
+              }
+            break;
+          case 15:
+            if (gl_list_size (list1) > 0)
+              {
+                size_t n = gl_list_size (list1);
+                const char *obj = "xyzzy";
+                ASSERT (!gl_list_remove (list1, obj));
+                ASSERT (!gl_list_remove (list2, obj));
+                ASSERT (gl_list_size (list1) == n);
+              }
+            break;
+          case 16:
+            {
+              size_t n = gl_list_size (list1);
+              gl_list_iterator_t iter1, iter2;
+              const void *elt;
+              iter1 = gl_list_iterator (list1);
+              iter2 = gl_list_iterator (list2);
+              for (i = 0; i < n; i++)
+                {
+                  ASSERT (gl_list_iterator_next (&iter1, &elt, NULL));
+                  ASSERT (gl_list_get_at (list1, i) == elt);
+                  ASSERT (gl_list_iterator_next (&iter2, &elt, NULL));
+                  ASSERT (gl_list_get_at (list2, i) == elt);
+                }
+              ASSERT (!gl_list_iterator_next (&iter1, &elt, NULL));
+              ASSERT (!gl_list_iterator_next (&iter2, &elt, NULL));
+              gl_list_iterator_free (&iter1);
+              gl_list_iterator_free (&iter2);
+            }
+            break;
+          case 17:
+            {
+              size_t end = RANDOM (gl_list_size (list1) + 1);
+              size_t start = RANDOM (end + 1);
+              gl_list_iterator_t iter1, iter2;
+              const void *elt;
+              iter1 = gl_list_iterator_from_to (list1, start, end);
+              iter2 = gl_list_iterator_from_to (list2, start, end);
+              for (i = start; i < end; i++)
+                {
+                  ASSERT (gl_list_iterator_next (&iter1, &elt, NULL));
+                  ASSERT (gl_list_get_at (list1, i) == elt);
+                  ASSERT (gl_list_iterator_next (&iter2, &elt, NULL));
+                  ASSERT (gl_list_get_at (list2, i) == elt);
+                }
+              ASSERT (!gl_list_iterator_next (&iter1, &elt, NULL));
+              ASSERT (!gl_list_iterator_next (&iter2, &elt, NULL));
+              gl_list_iterator_free (&iter1);
+              gl_list_iterator_free (&iter2);
+            }
+            break;
+          }
+        check_equals (list1, list2);
+      }
+
+    gl_list_free (list1);
+    gl_list_free (list2);
+    free (contents);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-binary-io.c b/src/gl/tests/test-binary-io.c
new file mode 100644
index 0000000..7da8f8b
--- /dev/null
+++ b/src/gl/tests/test-binary-io.c
@@ -0,0 +1,63 @@
+/* Test of binary mode I/O.
+   Copyright (C) 2005, 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+#include "binary-io.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  /* Test the O_BINARY macro.  */
+  {
+    int fd =
+      open ("t-bin-out0.tmp", O_CREAT | O_TRUNC | O_RDWR | O_BINARY, 0600);
+    if (write (fd, "Hello\n", 6) < 0)
+      exit (1);
+    close (fd);
+  }
+  {
+    struct stat statbuf;
+    if (stat ("t-bin-out0.tmp", &statbuf) < 0)
+      exit (1);
+    ASSERT (statbuf.st_size == 6);
+  }
+
+  switch (argv[1][0])
+    {
+    case '1':
+      /* Test the set_binary_mode() function.  */
+      set_binary_mode (1, O_BINARY);
+      fputs ("Hello\n", stdout);
+      break;
+
+    default:
+      break;
+    }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-binary-io.sh b/src/gl/tests/test-binary-io.sh
new file mode 100755
index 0000000..a177d94
--- /dev/null
+++ b/src/gl/tests/test-binary-io.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="$tmpfiles t-bin-out0.tmp t-bin-out1.tmp"
+${CHECKER} ./test-binary-io${EXEEXT} 1 > t-bin-out1.tmp || exit 1
+cmp t-bin-out0.tmp t-bin-out1.tmp > /dev/null || exit 1
+
+rm -fr $tmpfiles
+
+exit 0
diff --git a/src/gl/tests/test-bind.c b/src/gl/tests/test-bind.c
new file mode 100644
index 0000000..8054e9d
--- /dev/null
+++ b/src/gl/tests/test-bind.c
@@ -0,0 +1,58 @@
+/* Test binding a server socket to a port.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (bind, int, (int, const struct sockaddr *, socklen_t));
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct sockaddr_in addr;
+
+    addr.sin_family = AF_INET;
+    inet_pton (AF_INET, "127.0.0.1", &addr.sin_addr);
+    addr.sin_port = htons (80);
+    {
+      errno = 0;
+      ASSERT (bind (-1, (const struct sockaddr *) &addr, sizeof (addr)) == -1);
+      ASSERT (errno == EBADF);
+    }
+    {
+      close (99);
+      errno = 0;
+      ASSERT (bind (99, (const struct sockaddr *) &addr, sizeof (addr)) == -1);
+      ASSERT (errno == EBADF);
+    }
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-bitrotate.c b/src/gl/tests/test-bitrotate.c
new file mode 100644
index 0000000..98d15e2
--- /dev/null
+++ b/src/gl/tests/test-bitrotate.c
@@ -0,0 +1,279 @@
+/* Test of <bitrotate.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson <simon@josefsson.org>, 2008.  */
+
+#include <config.h>
+
+#include "bitrotate.h"
+
+#include "macros.h"
+
+int
+main (void)
+{
+  ASSERT (rotl8 (42, 0) == 42);
+  ASSERT (rotl8 (42, 1) == 84);
+  ASSERT (rotl8 (42, 2) == 168);
+  ASSERT (rotl8 (42, 3) == 81);
+  ASSERT (rotl8 (42, 4) == 162);
+  ASSERT (rotl8 (42, 5) == 69);
+  ASSERT (rotl8 (42, 6) == 138);
+  ASSERT (rotl8 (42, 7) == 21);
+  ASSERT (rotl8 (42, 8) == 42);
+
+  ASSERT (rotr8 (42, 0) == 42);
+  ASSERT (rotr8 (42, 1) == 21);
+  ASSERT (rotr8 (42, 2) == 138);
+  ASSERT (rotr8 (42, 3) == 69);
+  ASSERT (rotr8 (42, 4) == 162);
+  ASSERT (rotr8 (42, 5) == 81);
+  ASSERT (rotr8 (42, 6) == 168);
+  ASSERT (rotr8 (42, 7) == 84);
+  ASSERT (rotr8 (42, 8) == 42);
+
+  ASSERT (rotl16 (43981, 0) == 43981);
+  ASSERT (rotl16 (43981, 1) == 22427);
+  ASSERT (rotl16 (43981, 2) == 44854);
+  ASSERT (rotl16 (43981, 3) == 24173);
+  ASSERT (rotl16 (43981, 4) == 48346);
+  ASSERT (rotl16 (43981, 5) == 31157);
+  ASSERT (rotl16 (43981, 6) == 62314);
+  ASSERT (rotl16 (43981, 7) == 59093);
+  ASSERT (rotl16 (43981, 8) == 52651);
+  ASSERT (rotl16 (43981, 9) == 39767);
+  ASSERT (rotl16 (43981, 10) == 13999);
+  ASSERT (rotl16 (43981, 11) == 27998);
+  ASSERT (rotl16 (43981, 12) == 55996);
+  ASSERT (rotl16 (43981, 13) == 46457);
+  ASSERT (rotl16 (43981, 14) == 27379);
+  ASSERT (rotl16 (43981, 15) == 54758);
+  ASSERT (rotl16 (43981, 16) == 43981);
+
+  ASSERT (rotr16 (43981, 0) == 43981);
+  ASSERT (rotr16 (43981, 1) == 54758);
+  ASSERT (rotr16 (43981, 2) == 27379);
+  ASSERT (rotr16 (43981, 3) == 46457);
+  ASSERT (rotr16 (43981, 4) == 55996);
+  ASSERT (rotr16 (43981, 5) == 27998);
+  ASSERT (rotr16 (43981, 6) == 13999);
+  ASSERT (rotr16 (43981, 7) == 39767);
+  ASSERT (rotr16 (43981, 8) == 52651);
+  ASSERT (rotr16 (43981, 9) == 59093);
+  ASSERT (rotr16 (43981, 10) == 62314);
+  ASSERT (rotr16 (43981, 11) == 31157);
+  ASSERT (rotr16 (43981, 12) == 48346);
+  ASSERT (rotr16 (43981, 13) == 24173);
+  ASSERT (rotr16 (43981, 14) == 44854);
+  ASSERT (rotr16 (43981, 15) == 22427);
+  ASSERT (rotr16 (43981, 16) == 43981);
+
+  ASSERT (rotl32 (2309737967U, 1) == 324508639U);
+  ASSERT (rotl32 (2309737967U, 2) == 649017278U);
+  ASSERT (rotl32 (2309737967U, 3) == 1298034556U);
+  ASSERT (rotl32 (2309737967U, 4) == 2596069112U);
+  ASSERT (rotl32 (2309737967U, 5) == 897170929U);
+  ASSERT (rotl32 (2309737967U, 6) == 1794341858U);
+  ASSERT (rotl32 (2309737967U, 7) == 3588683716U);
+  ASSERT (rotl32 (2309737967U, 8) == 2882400137U);
+  ASSERT (rotl32 (2309737967U, 9) == 1469832979U);
+  ASSERT (rotl32 (2309737967U, 10) == 2939665958U);
+  ASSERT (rotl32 (2309737967U, 11) == 1584364621U);
+  ASSERT (rotl32 (2309737967U, 12) == 3168729242U);
+  ASSERT (rotl32 (2309737967U, 13) == 2042491189U);
+  ASSERT (rotl32 (2309737967U, 14) == 4084982378U);
+  ASSERT (rotl32 (2309737967U, 15) == 3874997461U);
+  ASSERT (rotl32 (2309737967U, 16) == 3455027627U);
+  ASSERT (rotl32 (2309737967U, 17) == 2615087959U);
+  ASSERT (rotl32 (2309737967U, 18) == 935208623U);
+  ASSERT (rotl32 (2309737967U, 19) == 1870417246U);
+  ASSERT (rotl32 (2309737967U, 20) == 3740834492U);
+  ASSERT (rotl32 (2309737967U, 21) == 3186701689U);
+  ASSERT (rotl32 (2309737967U, 22) == 2078436083U);
+  ASSERT (rotl32 (2309737967U, 23) == 4156872166U);
+  ASSERT (rotl32 (2309737967U, 24) == 4018777037U);
+  ASSERT (rotl32 (2309737967U, 25) == 3742586779U);
+  ASSERT (rotl32 (2309737967U, 26) == 3190206263U);
+  ASSERT (rotl32 (2309737967U, 27) == 2085445231U);
+  ASSERT (rotl32 (2309737967U, 28) == 4170890462U);
+  ASSERT (rotl32 (2309737967U, 29) == 4046813629U);
+  ASSERT (rotl32 (2309737967U, 30) == 3798659963U);
+  ASSERT (rotl32 (2309737967U, 31) == 3302352631U);
+
+  ASSERT (rotr32 (2309737967U, 1) == 3302352631lU);
+  ASSERT (rotr32 (2309737967U, 2) == 3798659963lU);
+  ASSERT (rotr32 (2309737967U, 3) == 4046813629lU);
+  ASSERT (rotr32 (2309737967U, 4) == 4170890462lU);
+  ASSERT (rotr32 (2309737967U, 5) == 2085445231lU);
+  ASSERT (rotr32 (2309737967U, 6) == 3190206263lU);
+  ASSERT (rotr32 (2309737967U, 7) == 3742586779lU);
+  ASSERT (rotr32 (2309737967U, 8) == 4018777037lU);
+  ASSERT (rotr32 (2309737967U, 9) == 4156872166lU);
+  ASSERT (rotr32 (2309737967U, 10) == 2078436083lU);
+  ASSERT (rotr32 (2309737967U, 11) == 3186701689lU);
+  ASSERT (rotr32 (2309737967U, 12) == 3740834492lU);
+  ASSERT (rotr32 (2309737967U, 13) == 1870417246lU);
+  ASSERT (rotr32 (2309737967U, 14) == 935208623lU);
+  ASSERT (rotr32 (2309737967U, 15) == 2615087959lU);
+  ASSERT (rotr32 (2309737967U, 16) == 3455027627lU);
+  ASSERT (rotr32 (2309737967U, 17) == 3874997461lU);
+  ASSERT (rotr32 (2309737967U, 18) == 4084982378lU);
+  ASSERT (rotr32 (2309737967U, 19) == 2042491189lU);
+  ASSERT (rotr32 (2309737967U, 20) == 3168729242lU);
+  ASSERT (rotr32 (2309737967U, 21) == 1584364621lU);
+  ASSERT (rotr32 (2309737967U, 22) == 2939665958lU);
+  ASSERT (rotr32 (2309737967U, 23) == 1469832979lU);
+  ASSERT (rotr32 (2309737967U, 24) == 2882400137lU);
+  ASSERT (rotr32 (2309737967U, 25) == 3588683716lU);
+  ASSERT (rotr32 (2309737967U, 26) == 1794341858lU);
+  ASSERT (rotr32 (2309737967U, 27) == 897170929lU);
+  ASSERT (rotr32 (2309737967U, 28) == 2596069112lU);
+  ASSERT (rotr32 (2309737967U, 29) == 1298034556lU);
+  ASSERT (rotr32 (2309737967U, 30) == 649017278lU);
+  ASSERT (rotr32 (2309737967U, 31) == 324508639lU);
+
+#ifdef UINT64_MAX
+  ASSERT (rotl64 (16045690984503098046ULL, 1) == 13644637895296644477ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 2) == 8842531716883737339ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 3) == 17685063433767474678ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 4) == 16923382793825397741ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 5) == 15400021513941243867ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 6) == 12353298954172936119ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 7) == 6259853834636320623ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 8) == 12519707669272641246ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 9) == 6592671264835730877ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 10) == 13185342529671461754ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 11) == 7923940985633371893ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 12) == 15847881971266743786ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 13) == 13249019868823935957ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 14) == 8051295663938320299ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 15) == 16102591327876640598ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 16) == 13758438582043729581ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 17) == 9070133090377907547ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 18) == 18140266180755815094ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 19) == 17833788287802078573ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 20) == 17220832501894605531ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 21) == 15994920930079659447ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 22) == 13543097786449767279ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 23) == 8639451499189982943ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 24) == 17278902998379965886ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 25) == 16111061923050380157ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 26) == 13775379772391208699ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 27) == 9104015471072865783ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 28) == 18208030942145731566ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 29) == 17969317810581911517ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 30) == 17491891547454271419ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 31) == 16537039021198991223ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 32) == 14627333968688430831ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 33) == 10807923863667310047ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 34) == 3169103653625068479ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 35) == 6338207307250136958ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 36) == 12676414614500273916ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 37) == 6906085155290996217ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 38) == 13812170310581992434ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 39) == 9177596547454433253ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 40) == 18355193094908866506ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 41) == 18263642116108181397ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 42) == 18080540158506811179ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 43) == 17714336243304070743ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 44) == 16981928412898589871ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 45) == 15517112752087628127ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 46) == 12587481430465704639ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 47) == 6728218787221857663ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 48) == 13456437574443715326ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 49) == 8466131075177879037ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 50) == 16932262150355758074ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 51) == 15417780227001964533ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 52) == 12388816380294377451ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 53) == 6330888686879203287ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 54) == 12661777373758406574ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 55) == 6876810673807261533ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 56) == 13753621347614523066ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 57) == 9060498621519494517ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 58) == 18120997243038989034ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 59) == 17795250412368426453ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 60) == 17143756751027301291ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 61) == 15840769428345050967ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 62) == 13234794782980550319ULL);
+  ASSERT (rotl64 (16045690984503098046ULL, 63) == 8022845492251549023ULL);
+
+  ASSERT (rotr64 (16045690984503098046ULL, 1) == 8022845492251549023ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 2) == 13234794782980550319ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 3) == 15840769428345050967ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 4) == 17143756751027301291ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 5) == 17795250412368426453ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 6) == 18120997243038989034ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 7) == 9060498621519494517ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 8) == 13753621347614523066ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 9) == 6876810673807261533ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 10) == 12661777373758406574ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 11) == 6330888686879203287ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 12) == 12388816380294377451ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 13) == 15417780227001964533ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 14) == 16932262150355758074ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 15) == 8466131075177879037ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 16) == 13456437574443715326ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 17) == 6728218787221857663ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 18) == 12587481430465704639ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 19) == 15517112752087628127ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 20) == 16981928412898589871ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 21) == 17714336243304070743ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 22) == 18080540158506811179ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 23) == 18263642116108181397ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 24) == 18355193094908866506ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 25) == 9177596547454433253ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 26) == 13812170310581992434ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 27) == 6906085155290996217ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 28) == 12676414614500273916ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 29) == 6338207307250136958ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 30) == 3169103653625068479ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 31) == 10807923863667310047ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 32) == 14627333968688430831ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 33) == 16537039021198991223ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 34) == 17491891547454271419ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 35) == 17969317810581911517ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 36) == 18208030942145731566ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 37) == 9104015471072865783ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 38) == 13775379772391208699ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 39) == 16111061923050380157ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 40) == 17278902998379965886ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 41) == 8639451499189982943ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 42) == 13543097786449767279ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 43) == 15994920930079659447ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 44) == 17220832501894605531ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 45) == 17833788287802078573ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 46) == 18140266180755815094ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 47) == 9070133090377907547ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 48) == 13758438582043729581ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 49) == 16102591327876640598ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 50) == 8051295663938320299ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 51) == 13249019868823935957ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 52) == 15847881971266743786ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 53) == 7923940985633371893ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 54) == 13185342529671461754ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 55) == 6592671264835730877ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 56) == 12519707669272641246ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 57) == 6259853834636320623ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 58) == 12353298954172936119ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 59) == 15400021513941243867ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 60) == 16923382793825397741ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 61) == 17685063433767474678ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 62) == 8842531716883737339ULL);
+  ASSERT (rotr64 (16045690984503098046ULL, 63) == 13644637895296644477ULL);
+#endif /* UINT64_MAX */
+
+  return 0;
+}
diff --git a/src/gl/tests/test-byteswap.c b/src/gl/tests/test-byteswap.c
new file mode 100644
index 0000000..196565f
--- /dev/null
+++ b/src/gl/tests/test-byteswap.c
@@ -0,0 +1,32 @@
+/* Test of <byteswap.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <byteswap.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+  ASSERT (bswap_16 (0xABCD) == 0xCDAB);
+  ASSERT (bswap_32 (0xDEADBEEF) == 0xEFBEADDE);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-c-ctype.c b/src/gl/tests/test-c-ctype.c
new file mode 100644
index 0000000..2077eb4
--- /dev/null
+++ b/src/gl/tests/test-c-ctype.c
@@ -0,0 +1,228 @@
+/* Test of character handling in C locale.
+   Copyright (C) 2005, 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+#include "c-ctype.h"
+
+#include <ctype.h>
+#include <limits.h>
+#include <locale.h>
+
+#include "macros.h"
+
+static void
+test_agree_with_C_locale (void)
+{
+  int c;
+
+  for (c = 0; c <= UCHAR_MAX; c++)
+    {
+      ASSERT (c_isascii (c) == (isascii (c) != 0));
+      if (c_isascii (c))
+        {
+          ASSERT (c_isalnum (c) == (isalnum (c) != 0));
+          ASSERT (c_isalpha (c) == (isalpha (c) != 0));
+          ASSERT (c_isblank (c) == (isblank (c) != 0));
+          ASSERT (c_iscntrl (c) == (iscntrl (c) != 0));
+          ASSERT (c_isdigit (c) == (isdigit (c) != 0));
+          ASSERT (c_islower (c) == (islower (c) != 0));
+          ASSERT (c_isgraph (c) == (isgraph (c) != 0));
+          ASSERT (c_isprint (c) == (isprint (c) != 0));
+          ASSERT (c_ispunct (c) == (ispunct (c) != 0));
+          ASSERT (c_isspace (c) == (isspace (c) != 0));
+          ASSERT (c_isupper (c) == (isupper (c) != 0));
+          ASSERT (c_isxdigit (c) == (isxdigit (c) != 0));
+          ASSERT (c_tolower (c) == tolower (c));
+          ASSERT (c_toupper (c) == toupper (c));
+        }
+    }
+}
+
+static void
+test_all (void)
+{
+  int c;
+  int n_isascii = 0;
+
+  for (c = CHAR_MIN; c <= UCHAR_MAX; c++)
+    {
+      if (! (0 <= c && c <= CHAR_MAX))
+        {
+          ASSERT (! c_isascii (c));
+          ASSERT (! c_isalnum (c));
+          ASSERT (! c_isalpha (c));
+          ASSERT (! c_isblank (c));
+          ASSERT (! c_iscntrl (c));
+          ASSERT (! c_isdigit (c));
+          ASSERT (! c_islower (c));
+          ASSERT (! c_isgraph (c));
+          ASSERT (! c_isprint (c));
+          ASSERT (! c_ispunct (c));
+          ASSERT (! c_isspace (c));
+          ASSERT (! c_isupper (c));
+          ASSERT (! c_isxdigit (c));
+          ASSERT (c_tolower (c) == c);
+          ASSERT (c_toupper (c) == c);
+        }
+
+      n_isascii += c_isascii (c);
+
+#ifdef C_CTYPE_ASCII
+      ASSERT (c_isascii (c) == (0 <= c && c <= 0x7f));
+#endif
+
+      ASSERT (c_isascii (c) == (c_isprint (c) || c_iscntrl (c)));
+
+      ASSERT (c_isalnum (c) == (c_isalpha (c) || c_isdigit (c)));
+
+      ASSERT (c_isalpha (c) == (c_islower (c) || c_isupper (c)));
+
+      switch (c)
+        {
+        case '\t': case ' ':
+          ASSERT (c_isblank (c) == 1);
+          break;
+        default:
+          ASSERT (c_isblank (c) == 0);
+          break;
+        }
+
+#ifdef C_CTYPE_ASCII
+      ASSERT (c_iscntrl (c) == ((c >= 0 && c < 0x20) || c == 0x7f));
+#endif
+
+      switch (c)
+        {
+        case '\a': case '\b': case '\f': case '\n':
+        case '\r': case '\t': case '\v':
+          ASSERT (c_iscntrl (c));
+          break;
+        }
+
+      ASSERT (! (c_iscntrl (c) && c_isprint (c)));
+
+      switch (c)
+        {
+        case '0': case '1': case '2': case '3': case '4': case '5':
+        case '6': case '7': case '8': case '9':
+          ASSERT (c_isdigit (c) == 1);
+          break;
+        default:
+          ASSERT (c_isdigit (c) == 0);
+          break;
+        }
+
+      switch (c)
+        {
+        case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+        case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
+        case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
+        case 's': case 't': case 'u': case 'v': case 'w': case 'x':
+        case 'y': case 'z':
+          ASSERT (c_islower (c) == 1);
+          ASSERT (c_toupper (c) == c - 'a' + 'A');
+          break;
+        default:
+          ASSERT (c_islower (c) == 0);
+          ASSERT (c_toupper (c) == c);
+          break;
+        }
+
+#ifdef C_CTYPE_ASCII
+      ASSERT (c_isgraph (c) == ((c >= 0x20 && c < 0x7f) && c != ' '));
+
+      ASSERT (c_isprint (c) == (c >= 0x20 && c < 0x7f));
+#endif
+
+      ASSERT (c_isgraph (c) == (c_isalnum (c) || c_ispunct (c)));
+
+      ASSERT (c_isprint (c) == (c_isgraph (c) || c == ' '));
+
+      switch (c)
+        {
+        case '!': case '"': case '#': case '$': case '%': case '&': case '\'':
+        case '(': case ')': case '*': case '+': case ',': case '-': case '.':
+        case '/': case ':': case ';': case '<': case '=': case '>': case '?':
+        case '@': case '[': case'\\': case ']': case '^': case '_': case '`':
+        case '{': case '|': case '}': case '~':
+          ASSERT (c_ispunct (c) == 1);
+          break;
+        default:
+          ASSERT (c_ispunct (c) == 0);
+          break;
+        }
+
+      switch (c)
+        {
+        case ' ': case '\t': case '\n': case '\v': case '\f': case '\r':
+          ASSERT (c_isspace (c) == 1);
+          break;
+        default:
+          ASSERT (c_isspace (c) == 0);
+          break;
+        }
+
+      switch (c)
+        {
+        case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+        case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
+        case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
+        case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
+        case 'Y': case 'Z':
+          ASSERT (c_isupper (c) == 1);
+          ASSERT (c_tolower (c) == c - 'A' + 'a');
+          break;
+        default:
+          ASSERT (c_isupper (c) == 0);
+          ASSERT (c_tolower (c) == c);
+          break;
+        }
+
+      switch (c)
+        {
+        case '0': case '1': case '2': case '3': case '4': case '5':
+        case '6': case '7': case '8': case '9':
+        case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+        case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+          ASSERT (c_isxdigit (c) == 1);
+          break;
+        default:
+          ASSERT (c_isxdigit (c) == 0);
+          break;
+        }
+    }
+
+  ASSERT (n_isascii == 128);
+}
+
+int
+main ()
+{
+  test_agree_with_C_locale ();
+
+  test_all ();
+
+  setlocale (LC_ALL, "de_DE");
+  test_all ();
+
+  setlocale (LC_ALL, "ja_JP.EUC-JP");
+  test_all ();
+
+  return 0;
+}
diff --git a/src/gl/tests/test-c-strcase.sh b/src/gl/tests/test-c-strcase.sh
new file mode 100755
index 0000000..14bdfb2
--- /dev/null
+++ b/src/gl/tests/test-c-strcase.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# Test in the C locale.
+${CHECKER} ./test-c-strcasecmp${EXEEXT} || exit 1
+${CHECKER} ./test-c-strncasecmp${EXEEXT} || exit 1
+
+# Test in an ISO-8859-1 or ISO-8859-15 locale.
+: ${LOCALE_FR=fr_FR}
+if test $LOCALE_FR != none; then
+  LC_ALL=$LOCALE_FR ${CHECKER} ./test-c-strcasecmp${EXEEXT} locale || exit 1
+  LC_ALL=$LOCALE_FR ${CHECKER} ./test-c-strncasecmp${EXEEXT} locale || exit 1
+fi
+
+# Test in a Turkish UTF-8 locale.
+: ${LOCALE_TR_UTF8=tr_TR.UTF-8}
+if test $LOCALE_TR_UTF8 != none; then
+  LC_ALL=$LOCALE_TR_UTF8 ${CHECKER} ./test-c-strcasecmp${EXEEXT} locale || exit 1
+  LC_ALL=$LOCALE_TR_UTF8 ${CHECKER} ./test-c-strncasecmp${EXEEXT} locale || exit 1
+fi
+
+exit 0
diff --git a/src/gl/tests/test-c-strcasecmp.c b/src/gl/tests/test-c-strcasecmp.c
new file mode 100644
index 0000000..cc2efb0
--- /dev/null
+++ b/src/gl/tests/test-c-strcasecmp.c
@@ -0,0 +1,68 @@
+/* Test of case-insensitive string comparison function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "c-strcase.h"
+#include "c-ctype.h"
+
+#include <locale.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  if (argc > 1)
+    {
+      /* configure should already have checked that the locale is supported.  */
+      if (setlocale (LC_ALL, "") == NULL)
+        return 1;
+    }
+
+  ASSERT (c_strcasecmp ("paragraph", "Paragraph") == 0);
+
+  ASSERT (c_strcasecmp ("paragrapH", "parAgRaph") == 0);
+
+  ASSERT (c_strcasecmp ("paragraph", "paraLyzed") < 0);
+  ASSERT (c_strcasecmp ("paraLyzed", "paragraph") > 0);
+
+  ASSERT (c_strcasecmp ("para", "paragraph") < 0);
+  ASSERT (c_strcasecmp ("paragraph", "para") > 0);
+
+  /* The following tests shows how c_strcasecmp() is different from
+     strcasecmp().  */
+
+  ASSERT (c_strcasecmp ("\311mile", "\351mile") < 0);
+  ASSERT (c_strcasecmp ("\351mile", "\311mile") > 0);
+
+  /* The following tests shows how c_strcasecmp() is different from
+     mbscasecmp().  */
+
+  ASSERT (c_strcasecmp ("\303\266zg\303\274r", "\303\226ZG\303\234R") > 0); /* özgür */
+  ASSERT (c_strcasecmp ("\303\226ZG\303\234R", "\303\266zg\303\274r") < 0); /* özgür */
+
+#if C_CTYPE_ASCII
+  /* This test shows how strings of different size cannot compare equal.  */
+  ASSERT (c_strcasecmp ("turkish", "TURK\304\260SH") < 0);
+  ASSERT (c_strcasecmp ("TURK\304\260SH", "turkish") > 0);
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-c-strncasecmp.c b/src/gl/tests/test-c-strncasecmp.c
new file mode 100644
index 0000000..6cbdce0
--- /dev/null
+++ b/src/gl/tests/test-c-strncasecmp.c
@@ -0,0 +1,82 @@
+/* Test of case-insensitive string comparison function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "c-strcase.h"
+#include "c-ctype.h"
+
+#include <locale.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  if (argc > 1)
+    {
+      /* configure should already have checked that the locale is supported.  */
+      if (setlocale (LC_ALL, "") == NULL)
+        return 1;
+    }
+
+  ASSERT (c_strncasecmp ("paragraph", "Paragraph", 1000000) == 0);
+  ASSERT (c_strncasecmp ("paragraph", "Paragraph", 9) == 0);
+
+  ASSERT (c_strncasecmp ("paragrapH", "parAgRaph", 1000000) == 0);
+  ASSERT (c_strncasecmp ("paragrapH", "parAgRaph", 9) == 0);
+
+  ASSERT (c_strncasecmp ("paragraph", "paraLyzed", 10) < 0);
+  ASSERT (c_strncasecmp ("paragraph", "paraLyzed", 9) < 0);
+  ASSERT (c_strncasecmp ("paragraph", "paraLyzed", 5) < 0);
+  ASSERT (c_strncasecmp ("paragraph", "paraLyzed", 4) == 0);
+  ASSERT (c_strncasecmp ("paraLyzed", "paragraph", 10) > 0);
+  ASSERT (c_strncasecmp ("paraLyzed", "paragraph", 9) > 0);
+  ASSERT (c_strncasecmp ("paraLyzed", "paragraph", 5) > 0);
+  ASSERT (c_strncasecmp ("paraLyzed", "paragraph", 4) == 0);
+
+  ASSERT (c_strncasecmp ("para", "paragraph", 10) < 0);
+  ASSERT (c_strncasecmp ("para", "paragraph", 9) < 0);
+  ASSERT (c_strncasecmp ("para", "paragraph", 5) < 0);
+  ASSERT (c_strncasecmp ("para", "paragraph", 4) == 0);
+  ASSERT (c_strncasecmp ("paragraph", "para", 10) > 0);
+  ASSERT (c_strncasecmp ("paragraph", "para", 9) > 0);
+  ASSERT (c_strncasecmp ("paragraph", "para", 5) > 0);
+  ASSERT (c_strncasecmp ("paragraph", "para", 4) == 0);
+
+  /* The following tests shows how c_strncasecmp() is different from
+     strncasecmp().  */
+
+  ASSERT (c_strncasecmp ("\311mily", "\351mile", 4) < 0);
+  ASSERT (c_strncasecmp ("\351mile", "\311mily", 4) > 0);
+
+  /* The following tests shows how c_strncasecmp() is different from
+     mbsncasecmp().  */
+
+  ASSERT (c_strncasecmp ("\303\266zg\303\274r", "\303\226ZG\303\234R", 99) > 0); /* özgür */
+  ASSERT (c_strncasecmp ("\303\226ZG\303\234R", "\303\266zg\303\274r", 99) < 0); /* özgür */
+
+#if C_CTYPE_ASCII
+  /* This test shows how strings of different size cannot compare equal.  */
+  ASSERT (c_strncasecmp ("turkish", "TURK\304\260SH", 7) < 0);
+  ASSERT (c_strncasecmp ("TURK\304\260SH", "turkish", 7) > 0);
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-calloc-gnu.c b/src/gl/tests/test-calloc-gnu.c
new file mode 100644
index 0000000..a98a75f
--- /dev/null
+++ b/src/gl/tests/test-calloc-gnu.c
@@ -0,0 +1,73 @@
+/* Test of calloc function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <stdint.h>
+
+#include "macros.h"
+
+/* Return N.
+   Usual compilers are not able to infer something about the return value.  */
+static size_t
+identity (size_t n)
+{
+  unsigned int x = rand ();
+  unsigned int y = x * x * x * x;
+  x++; y |= x * x * x * x;
+  x++; y |= x * x * x * x;
+  x++; y |= x * x * x * x;
+  y = y >> 1;
+  y &= -y;
+  y -= 8;
+  /* At this point Y is zero but GCC doesn't infer this.  */
+  return n + y;
+}
+
+int
+main ()
+{
+  /* Check that calloc (0, 0) is not a NULL pointer.  */
+  {
+    void * volatile p = calloc (0, 0);
+    ASSERT (p != NULL);
+    free (p);
+  }
+
+  /* Check that calloc fails when requested to allocate a block of memory
+     larger than PTRDIFF_MAX or SIZE_MAX bytes.
+     Use 'identity' to avoid a compiler warning from GCC 7.
+     'volatile' is needed to defeat an incorrect optimization by clang 10,
+     see <https://bugs.llvm.org/show_bug.cgi?id=46055>.  */
+  {
+    for (size_t n = 2; n != 0; n <<= 1)
+      {
+        void *volatile p = calloc (PTRDIFF_MAX / n + 1, identity (n));
+        ASSERT (p == NULL);
+        ASSERT (errno == ENOMEM);
+
+	p = calloc (SIZE_MAX / n + 1, identity (n));
+        ASSERT (p == NULL);
+        ASSERT (errno == ENOMEM);
+      }
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-cloexec.c b/src/gl/tests/test-cloexec.c
new file mode 100644
index 0000000..660e455
--- /dev/null
+++ b/src/gl/tests/test-cloexec.c
@@ -0,0 +1,148 @@
+/* Test duplicating non-inheritable file descriptors.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include "cloexec.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#endif
+
+#include "binary-io.h"
+#include "macros.h"
+
+/* Return non-zero if FD is open and inheritable across exec/spawn.  */
+static int
+is_inheritable (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  DWORD flags;
+  if (h == INVALID_HANDLE_VALUE || GetHandleInformation (h, &flags) == 0)
+    return 0;
+  return (flags & HANDLE_FLAG_INHERIT) != 0;
+#else
+# ifndef F_GETFD
+#  error Please port fcntl to your platform
+# endif
+  int i = fcntl (fd, F_GETFD);
+  return 0 <= i && (i & FD_CLOEXEC) == 0;
+#endif
+}
+
+#if !O_BINARY
+# define set_binary_mode(f,m) zero ()
+static int zero (void) { return 0; }
+#endif
+
+/* Return non-zero if FD is open in the given MODE, which is either
+   O_TEXT or O_BINARY.  */
+static int
+is_mode (int fd, int mode)
+{
+  int value = set_binary_mode (fd, O_BINARY);
+  set_binary_mode (fd, value);
+  return mode == value;
+}
+
+int
+main (void)
+{
+  const char *file = "test-cloexec.tmp";
+  int fd = creat (file, 0600);
+  int fd2;
+  int bad_fd = getdtablesize ();
+
+  /* Assume std descriptors were provided by invoker.  */
+  ASSERT (STDERR_FILENO < fd);
+  ASSERT (is_inheritable (fd));
+
+  /* Normal use of set_cloexec_flag.  */
+  ASSERT (set_cloexec_flag (fd, true) == 0);
+#if !(defined _WIN32 && ! defined __CYGWIN__)
+  ASSERT (!is_inheritable (fd));
+#endif
+  ASSERT (set_cloexec_flag (fd, false) == 0);
+  ASSERT (is_inheritable (fd));
+
+  /* Normal use of dup_cloexec.  */
+  fd2 = dup_cloexec (fd);
+  ASSERT (fd < fd2);
+  ASSERT (!is_inheritable (fd2));
+  ASSERT (close (fd) == 0);
+  ASSERT (dup_cloexec (fd2) == fd);
+  ASSERT (!is_inheritable (fd));
+  ASSERT (close (fd2) == 0);
+
+  /* On systems that distinguish between text and binary mode,
+     dup_cloexec reuses the mode of the source.  */
+  set_binary_mode (fd, O_BINARY);
+  ASSERT (is_mode (fd, O_BINARY));
+  fd2 = dup_cloexec (fd);
+  ASSERT (fd < fd2);
+  ASSERT (is_mode (fd2, O_BINARY));
+  ASSERT (close (fd2) == 0);
+  set_binary_mode (fd, O_TEXT);
+  ASSERT (is_mode (fd, O_TEXT));
+  fd2 = dup_cloexec (fd);
+  ASSERT (fd < fd2);
+  ASSERT (is_mode (fd2, O_TEXT));
+  ASSERT (close (fd2) == 0);
+
+  /* Test error handling.  */
+  errno = 0;
+  ASSERT (set_cloexec_flag (-1, false) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (set_cloexec_flag (bad_fd, false) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (set_cloexec_flag (fd2, false) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (dup_cloexec (-1) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (dup_cloexec (bad_fd) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (dup_cloexec (fd2) == -1);
+  ASSERT (errno == EBADF);
+
+  /* Clean up.  */
+  ASSERT (close (fd) == 0);
+  ASSERT (unlink (file) == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-close.c b/src/gl/tests/test-close.c
new file mode 100644
index 0000000..992475f
--- /dev/null
+++ b/src/gl/tests/test-close.c
@@ -0,0 +1,45 @@
+/* Test closing a file or socket.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (close, int, (int));
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (close (-1) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (close (99) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-connect.c b/src/gl/tests/test-connect.c
new file mode 100644
index 0000000..5e2905b
--- /dev/null
+++ b/src/gl/tests/test-connect.c
@@ -0,0 +1,60 @@
+/* Test connecting a client socket.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (connect, int, (int, const struct sockaddr *, socklen_t));
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct sockaddr_in addr;
+
+    addr.sin_family = AF_INET;
+    inet_pton (AF_INET, "127.0.0.1", &addr.sin_addr);
+    addr.sin_port = htons (80);
+    {
+      errno = 0;
+      ASSERT (connect (-1, (const struct sockaddr *) &addr, sizeof (addr))
+              == -1);
+      ASSERT (errno == EBADF);
+    }
+    {
+      close (99);
+      errno = 0;
+      ASSERT (connect (99, (const struct sockaddr *) &addr, sizeof (addr))
+              == -1);
+      ASSERT (errno == EBADF);
+    }
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-ctype.c b/src/gl/tests/test-ctype.c
new file mode 100644
index 0000000..43256a4
--- /dev/null
+++ b/src/gl/tests/test-ctype.c
@@ -0,0 +1,27 @@
+/* Test of <ctype.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <ctype.h>
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-dup2.c b/src/gl/tests/test-dup2.c
new file mode 100644
index 0000000..6c2e65e
--- /dev/null
+++ b/src/gl/tests/test-dup2.c
@@ -0,0 +1,222 @@
+/* Test duplicating file descriptors.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (dup2, int, (int, int));
+
+#include <errno.h>
+#include <fcntl.h>
+
+#if HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+#endif
+
+#include "binary-io.h"
+
+#if GNULIB_TEST_CLOEXEC
+# include "cloexec.h"
+#endif
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#endif
+
+#include "macros.h"
+
+/* Return non-zero if FD is open.  */
+static int
+is_open (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+#else
+# ifndef F_GETFL
+#  error Please port fcntl to your platform
+# endif
+  return 0 <= fcntl (fd, F_GETFL);
+#endif
+}
+
+#if GNULIB_TEST_CLOEXEC
+/* Return non-zero if FD is open and inheritable across exec/spawn.  */
+static int
+is_inheritable (int fd)
+{
+# if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  DWORD flags;
+  if (h == INVALID_HANDLE_VALUE || GetHandleInformation (h, &flags) == 0)
+    return 0;
+  return (flags & HANDLE_FLAG_INHERIT) != 0;
+# else
+#  ifndef F_GETFD
+#   error Please port fcntl to your platform
+#  endif
+  int i = fcntl (fd, F_GETFD);
+  return 0 <= i && (i & FD_CLOEXEC) == 0;
+# endif
+}
+#endif /* GNULIB_TEST_CLOEXEC */
+
+#if !O_BINARY
+# define set_binary_mode(f,m) zero ()
+static int zero (void) { return 0; }
+#endif
+
+/* Return non-zero if FD is open in the given MODE, which is either
+   O_TEXT or O_BINARY.  */
+static int
+is_mode (int fd, int mode)
+{
+  int value = set_binary_mode (fd, O_BINARY);
+  set_binary_mode (fd, value);
+  return mode == value;
+}
+
+int
+main (void)
+{
+  const char *file = "test-dup2.tmp";
+  char buffer[1];
+  int bad_fd = getdtablesize ();
+  int fd = open (file, O_CREAT | O_TRUNC | O_RDWR, 0600);
+
+  /* Assume std descriptors were provided by invoker.  */
+  ASSERT (STDERR_FILENO < fd);
+  ASSERT (is_open (fd));
+  /* Ignore any other fd's leaked into this process.  */
+  close (fd + 1);
+  close (fd + 2);
+  ASSERT (!is_open (fd + 1));
+  ASSERT (!is_open (fd + 2));
+
+  /* Assigning to self must be a no-op.  */
+  ASSERT (dup2 (fd, fd) == fd);
+  ASSERT (is_open (fd));
+
+  /* The source must be valid.  */
+  errno = 0;
+  ASSERT (dup2 (-1, fd) == -1);
+  ASSERT (errno == EBADF);
+  close (99);
+  errno = 0;
+  ASSERT (dup2 (99, fd) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (dup2 (AT_FDCWD, fd) == -1);
+  ASSERT (errno == EBADF);
+  ASSERT (is_open (fd));
+
+  /* If the source is not open, then the destination is unaffected.  */
+  errno = 0;
+  ASSERT (dup2 (fd + 1, fd + 1) == -1);
+  ASSERT (errno == EBADF);
+  ASSERT (!is_open (fd + 1));
+  errno = 0;
+  ASSERT (dup2 (fd + 1, fd) == -1);
+  ASSERT (errno == EBADF);
+  ASSERT (is_open (fd));
+
+  /* The destination must be valid.  */
+  errno = 0;
+  ASSERT (dup2 (fd, -2) == -1);
+  ASSERT (errno == EBADF);
+  if (bad_fd > 256)
+    {
+      ASSERT (dup2 (fd, 255) == 255);
+      ASSERT (dup2 (fd, 256) == 256);
+      ASSERT (close (255) == 0);
+      ASSERT (close (256) == 0);
+    }
+  ASSERT (dup2 (fd, bad_fd - 1) == bad_fd - 1);
+  ASSERT (close (bad_fd - 1) == 0);
+  errno = 0;
+  ASSERT (dup2 (fd, bad_fd) == -1);
+  ASSERT (errno == EBADF);
+
+  /* Using dup2 can skip fds.  */
+  ASSERT (dup2 (fd, fd + 2) == fd + 2);
+  ASSERT (is_open (fd));
+  ASSERT (!is_open (fd + 1));
+  ASSERT (is_open (fd + 2));
+
+  /* Verify that dup2 closes the previous occupant of a fd.  */
+  ASSERT (open ("/dev/null", O_WRONLY, 0600) == fd + 1);
+  ASSERT (dup2 (fd + 1, fd) == fd);
+  ASSERT (close (fd + 1) == 0);
+  ASSERT (write (fd, "1", 1) == 1);
+  ASSERT (dup2 (fd + 2, fd) == fd);
+  ASSERT (lseek (fd, 0, SEEK_END) == 0);
+  ASSERT (write (fd + 2, "2", 1) == 1);
+  ASSERT (lseek (fd, 0, SEEK_SET) == 0);
+  ASSERT (read (fd, buffer, 1) == 1);
+  ASSERT (*buffer == '2');
+
+#if GNULIB_TEST_CLOEXEC
+  /* Any new fd created by dup2 must not be cloexec.  */
+  ASSERT (close (fd + 2) == 0);
+  ASSERT (dup_cloexec (fd) == fd + 1);
+  ASSERT (!is_inheritable (fd + 1));
+  ASSERT (dup2 (fd + 1, fd + 1) == fd + 1);
+  ASSERT (!is_inheritable (fd + 1));
+  ASSERT (dup2 (fd + 1, fd + 2) == fd + 2);
+  ASSERT (!is_inheritable (fd + 1));
+  ASSERT (is_inheritable (fd + 2));
+  errno = 0;
+  ASSERT (dup2 (fd + 1, -1) == -1);
+  ASSERT (errno == EBADF);
+  ASSERT (!is_inheritable (fd + 1));
+#endif
+
+  /* On systems that distinguish between text and binary mode, dup2
+     reuses the mode of the source.  */
+  set_binary_mode (fd, O_BINARY);
+  ASSERT (is_mode (fd, O_BINARY));
+  ASSERT (dup2 (fd, fd + 1) == fd + 1);
+  ASSERT (is_mode (fd + 1, O_BINARY));
+  set_binary_mode (fd, O_TEXT);
+  ASSERT (is_mode (fd, O_TEXT));
+  ASSERT (dup2 (fd, fd + 1) == fd + 1);
+  ASSERT (is_mode (fd + 1, O_TEXT));
+
+  /* Clean up.  */
+  ASSERT (close (fd + 2) == 0);
+  ASSERT (close (fd + 1) == 0);
+  ASSERT (close (fd) == 0);
+  ASSERT (unlink (file) == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-environ.c b/src/gl/tests/test-environ.c
new file mode 100644
index 0000000..2935e43
--- /dev/null
+++ b/src/gl/tests/test-environ.c
@@ -0,0 +1,44 @@
+/* Test of environ variable.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include <string.h>
+
+int
+main ()
+{
+  /* The environment variables that are set even in the weirdest situations
+     are HOME and PATH.
+     POSIX says that HOME is initialized by the system, and that PATH may be
+     unset.  But in practice it's more frequent to see HOME unset and PATH
+     set.  So we test the presence of PATH.  */
+  char **remaining_variables = environ;
+  char *string;
+
+  for (; (string = *remaining_variables) != NULL; remaining_variables++)
+    {
+      if (strncmp (string, "PATH=", 5) == 0)
+        /* Found the PATH environment variable.  */
+        return 0;
+    }
+  /* Failed to find the PATH environment variable.  */
+  return 1;
+}
diff --git a/src/gl/tests/test-errno.c b/src/gl/tests/test-errno.c
new file mode 100644
index 0000000..59c5344
--- /dev/null
+++ b/src/gl/tests/test-errno.c
@@ -0,0 +1,119 @@
+/* Test of <errno.h> substitute.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <errno.h>
+
+/* Verify that the POSIX mandated errno values exist and can be used as
+   initializers outside of a function.
+   The variable names happen to match the Linux/x86 error numbers.  */
+int e1 = EPERM;
+int e2 = ENOENT;
+int e3 = ESRCH;
+int e4 = EINTR;
+int e5 = EIO;
+int e6 = ENXIO;
+int e7 = E2BIG;
+int e8 = ENOEXEC;
+int e9 = EBADF;
+int e10 = ECHILD;
+int e11 = EAGAIN;
+int e11a = EWOULDBLOCK;
+int e12 = ENOMEM;
+int e13 = EACCES;
+int e14 = EFAULT;
+int e16 = EBUSY;
+int e17 = EEXIST;
+int e18 = EXDEV;
+int e19 = ENODEV;
+int e20 = ENOTDIR;
+int e21 = EISDIR;
+int e22 = EINVAL;
+int e23 = ENFILE;
+int e24 = EMFILE;
+int e25 = ENOTTY;
+int e26 = ETXTBSY;
+int e27 = EFBIG;
+int e28 = ENOSPC;
+int e29 = ESPIPE;
+int e30 = EROFS;
+int e31 = EMLINK;
+int e32 = EPIPE;
+int e33 = EDOM;
+int e34 = ERANGE;
+int e35 = EDEADLK;
+int e36 = ENAMETOOLONG;
+int e37 = ENOLCK;
+int e38 = ENOSYS;
+int e39 = ENOTEMPTY;
+int e40 = ELOOP;
+int e42 = ENOMSG;
+int e43 = EIDRM;
+int e67 = ENOLINK;
+int e71 = EPROTO;
+int e72 = EMULTIHOP;
+int e74 = EBADMSG;
+int e75 = EOVERFLOW;
+int e84 = EILSEQ;
+int e88 = ENOTSOCK;
+int e89 = EDESTADDRREQ;
+int e90 = EMSGSIZE;
+int e91 = EPROTOTYPE;
+int e92 = ENOPROTOOPT;
+int e93 = EPROTONOSUPPORT;
+int e95 = EOPNOTSUPP;
+int e95a = ENOTSUP;
+int e97 = EAFNOSUPPORT;
+int e98 = EADDRINUSE;
+int e99 = EADDRNOTAVAIL;
+int e100 = ENETDOWN;
+int e101 = ENETUNREACH;
+int e102 = ENETRESET;
+int e103 = ECONNABORTED;
+int e104 = ECONNRESET;
+int e105 = ENOBUFS;
+int e106 = EISCONN;
+int e107 = ENOTCONN;
+int e110 = ETIMEDOUT;
+int e111 = ECONNREFUSED;
+int e113 = EHOSTUNREACH;
+int e114 = EALREADY;
+int e115 = EINPROGRESS;
+int e116 = ESTALE;
+int e122 = EDQUOT;
+int e125 = ECANCELED;
+int e130 = EOWNERDEAD;
+int e131 = ENOTRECOVERABLE;
+
+/* Don't verify that these errno values are all different, except for possibly
+   EWOULDBLOCK == EAGAIN.  Even Linux/x86 does not pass this check: it has
+   ENOTSUP == EOPNOTSUPP.  */
+
+int
+main ()
+{
+  /* Verify that errno can be assigned.  */
+  errno = EOVERFLOW;
+
+  /* snprintf() callers want to distinguish EINVAL and EOVERFLOW.  */
+  if (errno == EINVAL)
+    return 1;
+
+  return 0;
+}
diff --git a/src/gl/tests/test-explicit_bzero.c b/src/gl/tests/test-explicit_bzero.c
new file mode 100644
index 0000000..cdb8392
--- /dev/null
+++ b/src/gl/tests/test-explicit_bzero.c
@@ -0,0 +1,177 @@
+/* Test of explicit_bzero() function.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (explicit_bzero, void, (void *, size_t));
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "vma-iter.h"
+#include "macros.h"
+
+#define SECRET "xyzzy1729"
+#define SECRET_SIZE 9
+
+static char zero[SECRET_SIZE] = { 0 };
+
+/* Enable this to verify that the test is effective.  */
+#if 0
+# define explicit_bzero(a, n)  memset (a, '\0', n)
+#endif
+
+/* =================== Verify operation on static memory =================== */
+
+static char stbuf[SECRET_SIZE];
+
+static void
+test_static (void)
+{
+  memcpy (stbuf, SECRET, SECRET_SIZE);
+  explicit_bzero (stbuf, SECRET_SIZE);
+  ASSERT (memcmp (zero, stbuf, SECRET_SIZE) == 0);
+}
+
+/* =============== Verify operation on heap-allocated memory =============== */
+
+/* Test whether an address range is mapped in memory.  */
+#if VMA_ITERATE_SUPPORTED
+
+struct locals
+{
+  uintptr_t range_start;
+  uintptr_t range_end;
+};
+
+static int
+vma_iterate_callback (void *data, uintptr_t start, uintptr_t end,
+                      unsigned int flags)
+{
+  struct locals *lp = (struct locals *) data;
+
+  /* Remove from [range_start, range_end) the part at the beginning or at the
+     end that is covered by [start, end).  */
+  if (start <= lp->range_start && end > lp->range_start)
+    lp->range_start = (end < lp->range_end ? end : lp->range_end);
+  if (start < lp->range_end && end >= lp->range_end)
+    lp->range_end = (start > lp->range_start ? start : lp->range_start);
+
+  return 0;
+}
+
+static bool
+is_range_mapped (uintptr_t range_start, uintptr_t range_end)
+{
+  struct locals l;
+
+  l.range_start = range_start;
+  l.range_end = range_end;
+  vma_iterate (vma_iterate_callback, &l);
+  return l.range_start == l.range_end;
+}
+
+#else
+
+static bool
+is_range_mapped (uintptr_t range_start, uintptr_t range_end)
+{
+  return true;
+}
+
+#endif
+
+static void
+test_heap (void)
+{
+  char *heapbuf = (char *) malloc (SECRET_SIZE);
+  uintptr_t addr = (uintptr_t) heapbuf;
+  memcpy (heapbuf, SECRET, SECRET_SIZE);
+  explicit_bzero (heapbuf, SECRET_SIZE);
+  free (heapbuf);
+  if (is_range_mapped (addr, addr + SECRET_SIZE))
+    {
+      /* some implementation could override freed memory by canaries so
+         compare against secret */
+      ASSERT (memcmp (heapbuf, SECRET, SECRET_SIZE) != 0);
+      printf ("test_heap: address range is still mapped after free().\n");
+    }
+  else
+    printf ("test_heap: address range is unmapped after free().\n");
+}
+
+/* =============== Verify operation on stack-allocated memory =============== */
+
+/* There are two passes:
+     1. Put a secret in memory and invoke explicit_bzero on it.
+     2. Verify that the memory has been erased.
+   Implement them in the same function, so that they access the same memory
+   range on the stack.  */
+static int _GL_ATTRIBUTE_NOINLINE
+do_secret_stuff (volatile int pass)
+{
+  char stackbuf[SECRET_SIZE];
+  if (pass == 1)
+    {
+      memcpy (stackbuf, SECRET, SECRET_SIZE);
+      explicit_bzero (stackbuf, SECRET_SIZE);
+      return 0;
+    }
+  else /* pass == 2 */
+    {
+      return memcmp (zero, stackbuf, SECRET_SIZE) != 0;
+    }
+}
+
+static void
+test_stack (void)
+{
+  int count = 0;
+  int repeat;
+
+  for (repeat = 1000; repeat > 0; repeat--)
+    {
+      do_secret_stuff (1);
+      count += do_secret_stuff (2);
+    }
+  /* If explicit_bzero works, count is near 0.  (It may be > 0 if there were
+     some asynchronous signal invocations between the two calls of
+     do_secret_stuff.)
+     If explicit_bzero is optimized away by the compiler, count comes out as
+     approximately 1000.  */
+  printf ("test_stack: count = %d\n", count);
+  ASSERT (count < 50);
+}
+
+/* ========================================================================== */
+
+int
+main ()
+{
+  test_static ();
+  test_heap ();
+  test_stack ();
+
+  return 0;
+}
diff --git a/src/gl/tests/test-fcntl-h.c b/src/gl/tests/test-fcntl-h.c
new file mode 100644
index 0000000..ab25cf7
--- /dev/null
+++ b/src/gl/tests/test-fcntl-h.c
@@ -0,0 +1,130 @@
+/* Test of <fcntl.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <fcntl.h>
+
+/* Check that the various O_* macros are defined.  */
+int o = (O_DIRECT | O_DIRECTORY | O_DSYNC | O_IGNORE_CTTY | O_NDELAY | O_NOATIME
+         | O_NONBLOCK | O_NOCTTY | O_NOFOLLOW | O_NOLINK | O_NOLINKS | O_NOTRANS
+         | O_RSYNC | O_SYNC | O_TTY_INIT | O_BINARY | O_TEXT);
+
+/* Check that the various SEEK_* macros are defined.  */
+int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
+
+/* Check that the FD_* macros are defined.  */
+int i = FD_CLOEXEC;
+
+/* Check that the types are all defined.  */
+pid_t t1;
+off_t t2;
+mode_t t3;
+
+int
+main (void)
+{
+  /* Ensure no overlap in SEEK_*. */
+  switch (0)
+    {
+    case SEEK_CUR:
+    case SEEK_END:
+    case SEEK_SET:
+      ;
+    }
+
+  /* Ensure no dangerous overlap in non-zero gnulib-defined replacements.  */
+  switch (O_RDONLY)
+    {
+      /* Access modes */
+    case O_RDONLY:
+    case O_WRONLY:
+    case O_RDWR:
+#if O_EXEC && O_EXEC != O_RDONLY
+    case O_EXEC:
+#endif
+#if O_SEARCH && O_EXEC != O_SEARCH && O_SEARCH != O_RDONLY
+    case O_SEARCH:
+#endif
+      i = ! (~O_ACCMODE & (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH));
+      break;
+
+      /* Everyone should have these */
+    case O_CREAT:
+    case O_EXCL:
+    case O_TRUNC:
+    case O_APPEND:
+      break;
+
+      /* These might be 0 or O_RDONLY, only test non-zero versions.  */
+#if O_CLOEXEC
+    case O_CLOEXEC:
+#endif
+#if O_DIRECT
+    case O_DIRECT:
+#endif
+#if O_DIRECTORY
+    case O_DIRECTORY:
+#endif
+#if O_DSYNC
+    case O_DSYNC:
+#endif
+#if O_IGNORE_CTTY
+    case O_IGNORE_CTTY:
+#endif
+#if O_NOATIME
+    case O_NOATIME:
+#endif
+#if O_NONBLOCK
+    case O_NONBLOCK:
+#endif
+#if O_NOCTTY
+    case O_NOCTTY:
+#endif
+#if O_NOFOLLOW
+    case O_NOFOLLOW:
+#endif
+#if O_NOLINK
+    case O_NOLINK:
+#endif
+#if O_NOLINKS
+    case O_NOLINKS:
+#endif
+#if O_NOTRANS
+    case O_NOTRANS:
+#endif
+#if O_RSYNC && O_RSYNC != O_DSYNC
+    case O_RSYNC:
+#endif
+#if O_SYNC && O_SYNC != O_DSYNC && O_SYNC != O_RSYNC
+    case O_SYNC:
+#endif
+#if O_TTY_INIT
+    case O_TTY_INIT:
+#endif
+#if O_BINARY
+    case O_BINARY:
+#endif
+#if O_TEXT
+    case O_TEXT:
+#endif
+      ;
+    }
+
+  return !i;
+}
diff --git a/src/gl/tests/test-fcntl.c b/src/gl/tests/test-fcntl.c
new file mode 100644
index 0000000..cb834b4
--- /dev/null
+++ b/src/gl/tests/test-fcntl.c
@@ -0,0 +1,435 @@
+/* Test of fcntl(2).
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <fcntl.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fcntl, int, (int, int, ...));
+
+/* Helpers.  */
+#include <errno.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <unistd.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#endif
+
+#include "binary-io.h"
+#include "macros.h"
+
+#if !O_BINARY
+# define set_binary_mode(f,m) zero ()
+static int zero (void) { return 0; }
+#endif
+
+/* Return true if FD is open.  */
+static bool
+is_open (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+#else
+# ifndef F_GETFL
+#  error Please port fcntl to your platform
+# endif
+  return 0 <= fcntl (fd, F_GETFL);
+#endif
+}
+
+/* Return true if FD is open and inheritable across exec/spawn.  */
+static bool
+is_inheritable (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  DWORD flags;
+  if (h == INVALID_HANDLE_VALUE || GetHandleInformation (h, &flags) == 0)
+    return false;
+  return (flags & HANDLE_FLAG_INHERIT) != 0;
+#else
+# ifndef F_GETFD
+#  error Please port fcntl to your platform
+# endif
+  int i = fcntl (fd, F_GETFD);
+  return 0 <= i && (i & FD_CLOEXEC) == 0;
+#endif
+}
+
+/* Return non-zero if FD is open in the given MODE, which is either
+   O_TEXT or O_BINARY.  */
+static bool
+is_mode (int fd, int mode)
+{
+  int value = set_binary_mode (fd, O_BINARY);
+  set_binary_mode (fd, value);
+  return mode == value;
+}
+
+/* Since native fcntl can have more supported operations than our
+   replacement is aware of, and since various operations assign
+   different types to the vararg argument, a wrapper around fcntl must
+   be able to pass a vararg of unknown type on through to the original
+   fcntl.  Make sure that this works properly: func1 behaves like the
+   original fcntl interpreting the vararg as an int or a pointer to a
+   struct, and func2 behaves like rpl_fcntl that doesn't know what
+   type to forward.  */
+struct dummy_struct
+{
+  long filler;
+  int value;
+};
+static int
+func1 (int a, ...)
+{
+  va_list arg;
+  int i;
+  va_start (arg, a);
+  if (a < 4)
+    i = va_arg (arg, int);
+  else
+    {
+      struct dummy_struct *s = va_arg (arg, struct dummy_struct *);
+      i = s->value;
+    }
+  va_end (arg);
+  return i;
+}
+static int
+func2 (int a, ...)
+{
+  va_list arg;
+  void *p;
+  va_start (arg, a);
+  p = va_arg (arg, void *);
+  va_end (arg);
+  return func1 (a, p);
+}
+
+/* Ensure that all supported fcntl actions are distinct, and
+   usable in preprocessor expressions.  */
+static void
+check_flags (void)
+{
+  switch (0)
+    {
+    case F_DUPFD:
+#if F_DUPFD
+#endif
+
+    case F_DUPFD_CLOEXEC:
+#if F_DUPFD_CLOEXEC
+#endif
+
+    case F_GETFD:
+#if F_GETFD
+#endif
+
+#ifdef F_SETFD
+    case F_SETFD:
+# if F_SETFD
+# endif
+#endif
+
+#ifdef F_GETFL
+    case F_GETFL:
+# if F_GETFL
+# endif
+#endif
+
+#ifdef F_SETFL
+    case F_SETFL:
+# if F_SETFL
+# endif
+#endif
+
+#ifdef F_GETOWN
+    case F_GETOWN:
+# if F_GETOWN
+# endif
+#endif
+
+#ifdef F_SETOWN
+    case F_SETOWN:
+# if F_SETOWN
+# endif
+#endif
+
+#ifdef F_GETLK
+    case F_GETLK:
+# if F_GETLK
+# endif
+#endif
+
+#ifdef F_SETLK
+    case F_SETLK:
+# if F_SETLK
+# endif
+#endif
+
+#ifdef F_SETLKW
+    case F_SETLKW:
+# if F_SETLKW
+# endif
+#endif
+
+    default:
+      ;
+    }
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (argc > 1)
+    /* child process */
+    return (is_open (10) ? 42 : 0);
+
+  const char *file = "test-fcntl.tmp";
+  int fd;
+  int bad_fd = getdtablesize ();
+
+  /* Sanity check that rpl_fcntl is likely to work.  */
+  ASSERT (func2 (1, 2) == 2);
+  ASSERT (func2 (2, -2) == -2);
+  ASSERT (func2 (3, 0x80000000) == 0x80000000);
+  {
+    struct dummy_struct s = { 0L, 4 };
+    ASSERT (func2 (4, &s) == 4);
+  }
+  check_flags ();
+
+  /* Assume std descriptors were provided by invoker, and ignore fds
+     that might have been inherited.  */
+  fd = creat (file, 0600);
+  ASSERT (STDERR_FILENO < fd);
+  close (fd + 1);
+  close (fd + 2);
+
+  /* For F_DUPFD*, the source must be valid.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_DUPFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_DUPFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_DUPFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (-1, F_DUPFD_CLOEXEC, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_DUPFD_CLOEXEC, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_DUPFD_CLOEXEC, 0) == -1);
+  ASSERT (errno == EBADF);
+
+  /* For F_DUPFD*, the destination must be valid.  */
+  errno = 0;
+  ASSERT (fcntl (fd, F_DUPFD, -1) == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (fcntl (fd, F_DUPFD, bad_fd) == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, -1) == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, bad_fd) == -1);
+  ASSERT (errno == EINVAL
+          || errno == EMFILE /* WSL */);
+
+  /* For F_DUPFD*, check for correct inheritance, as well as
+     preservation of text vs. binary.  */
+  set_binary_mode (fd, O_BINARY);
+  ASSERT (is_open (fd));
+  ASSERT (!is_open (fd + 1));
+  ASSERT (!is_open (fd + 2));
+  ASSERT (is_inheritable (fd));
+  ASSERT (is_mode (fd, O_BINARY));
+
+  ASSERT (fcntl (fd, F_DUPFD, fd) == fd + 1);
+  ASSERT (is_open (fd));
+  ASSERT (is_open (fd + 1));
+  ASSERT (!is_open (fd + 2));
+  ASSERT (is_inheritable (fd + 1));
+  ASSERT (is_mode (fd, O_BINARY));
+  ASSERT (is_mode (fd + 1, O_BINARY));
+  ASSERT (close (fd + 1) == 0);
+
+  ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, fd + 2) == fd + 2);
+  ASSERT (is_open (fd));
+  ASSERT (!is_open (fd + 1));
+  ASSERT (is_open (fd + 2));
+  ASSERT (is_inheritable (fd));
+  ASSERT (!is_inheritable (fd + 2));
+  ASSERT (is_mode (fd, O_BINARY));
+  ASSERT (is_mode (fd + 2, O_BINARY));
+  ASSERT (close (fd) == 0);
+
+  set_binary_mode (fd + 2, O_TEXT);
+  ASSERT (fcntl (fd + 2, F_DUPFD, fd + 1) == fd + 1);
+  ASSERT (!is_open (fd));
+  ASSERT (is_open (fd + 1));
+  ASSERT (is_open (fd + 2));
+  ASSERT (is_inheritable (fd + 1));
+  ASSERT (!is_inheritable (fd + 2));
+  ASSERT (is_mode (fd + 1, O_TEXT));
+  ASSERT (is_mode (fd + 2, O_TEXT));
+  ASSERT (close (fd + 1) == 0);
+
+  ASSERT (fcntl (fd + 2, F_DUPFD_CLOEXEC, 0) == fd);
+  ASSERT (is_open (fd));
+  ASSERT (!is_open (fd + 1));
+  ASSERT (is_open (fd + 2));
+  ASSERT (!is_inheritable (fd));
+  ASSERT (!is_inheritable (fd + 2));
+  ASSERT (is_mode (fd, O_TEXT));
+  ASSERT (is_mode (fd + 2, O_TEXT));
+  ASSERT (close (fd + 2) == 0);
+
+  /* Test F_GETFD on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_GETFD) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_GETFD) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_GETFD) == -1);
+  ASSERT (errno == EBADF);
+
+  /* Test F_GETFD, the FD_CLOEXEC bit.  */
+  {
+    int result = fcntl (fd, F_GETFD);
+    ASSERT (0 <= result);
+    ASSERT ((result & FD_CLOEXEC) == FD_CLOEXEC);
+    ASSERT (dup (fd) == fd + 1);
+    result = fcntl (fd + 1, F_GETFD);
+    ASSERT (0 <= result);
+    ASSERT ((result & FD_CLOEXEC) == 0);
+    ASSERT (close (fd + 1) == 0);
+  }
+
+#ifdef F_SETFD
+  /* Test F_SETFD on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_SETFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_SETFD, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_SETFD, 0) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+#ifdef F_GETFL
+  /* Test F_GETFL on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_GETFL) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_GETFL) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_GETFL) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+#ifdef F_SETFL
+  /* Test F_SETFL on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_SETFL, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_SETFL, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_SETFL, 0) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+#ifdef F_GETOWN
+  /* Test F_GETOWN on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_GETOWN) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_GETOWN) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_GETOWN) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+#ifdef F_SETOWN
+  /* Test F_SETFL on invalid file descriptors.  */
+  errno = 0;
+  ASSERT (fcntl (-1, F_SETOWN, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (fd + 1, F_SETOWN, 0) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
+  ASSERT (fcntl (bad_fd, F_SETOWN, 0) == -1);
+  ASSERT (errno == EBADF);
+#endif
+
+  /* Cleanup.  */
+  ASSERT (close (fd) == 0);
+  ASSERT (unlink (file) == 0);
+
+  /* Close file descriptors that may have been inherited from the parent
+     process and that would cause failures below.
+     Such file descriptors have been seen:
+       - with GNU make, when invoked as 'make -j N' with j > 1,
+       - in some versions of the KDE desktop environment,
+       - on NetBSD,
+       - in MacPorts with the "trace mode" enabled.
+   */
+  (void) close (10);
+
+  /* Test whether F_DUPFD_CLOEXEC is effective.  */
+  ASSERT (fcntl (1, F_DUPFD_CLOEXEC, 10) >= 0);
+#if defined _WIN32 && !defined __CYGWIN__
+  return _execl ("./test-fcntl", "./test-fcntl", "child", NULL);
+#else
+  return execl ("./test-fcntl", "./test-fcntl", "child", NULL);
+#endif
+}
diff --git a/src/gl/tests/test-fdopen.c b/src/gl/tests/test-fdopen.c
new file mode 100644
index 0000000..86793bc
--- /dev/null
+++ b/src/gl/tests/test-fdopen.c
@@ -0,0 +1,49 @@
+/* Test opening a stream with a file descriptor.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fdopen, FILE *, (int, const char *));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Test behavior on failure.  POSIX makes it hard to check for
+     failure, since the behavior is not well-defined on invalid file
+     descriptors, so try fdopen 1000 times and if that's not enough to
+     fail due to EMFILE, so be it.  */
+
+  int i;
+  for (i = 0; i < 1000; i++)
+    {
+      errno = 0;
+      if (! fdopen (STDOUT_FILENO, "w"))
+        {
+          ASSERT (errno != 0);
+          break;
+        }
+    }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-fgetc.c b/src/gl/tests/test-fgetc.c
new file mode 100644
index 0000000..6faae5c
--- /dev/null
+++ b/src/gl/tests/test-fgetc.c
@@ -0,0 +1,99 @@
+/* Test of fgetc() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fgetc, int, (FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = "test-fgetc.txt";
+
+  /* We don't have an fgetc() function that installs an invalid parameter
+     handler so far.  So install that handler here, explicitly.  */
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+  gl_msvc_inval_ensure_handler ();
+#endif
+
+  /* Prepare a file.  */
+  {
+    const char text[] = "hello world";
+    int fd = open (filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
+    ASSERT (fd >= 0);
+    ASSERT (write (fd, text, sizeof (text)) == sizeof (text));
+    ASSERT (close (fd) == 0);
+  }
+
+  /* Test that fgetc() sets errno if someone else closes the stream
+     fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "r");
+    ASSERT (fp != NULL);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fgetc (fp) == EOF);
+    ASSERT (errno == EBADF);
+    ASSERT (ferror (fp));
+    fclose (fp);
+  }
+
+  /* Test that fgetc() sets errno if the stream was constructed with
+     an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "r");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (fgetc (fp) == EOF);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "r");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (fgetc (fp) == EOF);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-float.c b/src/gl/tests/test-float.c
new file mode 100644
index 0000000..f79e819
--- /dev/null
+++ b/src/gl/tests/test-float.c
@@ -0,0 +1,384 @@
+/* Test of <float.h> substitute.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <float.h>
+
+#include "fpucw.h"
+#include "macros.h"
+
+/* Check that FLT_RADIX is a constant expression.  */
+int a[] = { FLT_RADIX };
+
+#if FLT_RADIX == 2
+
+/* Return 2^n.  */
+static float
+pow2f (int n)
+{
+  int k = n;
+  volatile float x = 1;
+  volatile float y = 2;
+  /* Invariant: 2^n == x * y^k.  */
+  if (k < 0)
+    {
+      y = 0.5f;
+      k = - k;
+    }
+  while (k > 0)
+    {
+      if (k != 2 * (k / 2))
+        {
+          x = x * y;
+          k = k - 1;
+        }
+      if (k == 0)
+        break;
+      y = y * y;
+      k = k / 2;
+    }
+  /* Now k == 0, hence x == 2^n.  */
+  return x;
+}
+
+/* Return 2^n.  */
+static double
+pow2d (int n)
+{
+  int k = n;
+  volatile double x = 1;
+  volatile double y = 2;
+  /* Invariant: 2^n == x * y^k.  */
+  if (k < 0)
+    {
+      y = 0.5;
+      k = - k;
+    }
+  while (k > 0)
+    {
+      if (k != 2 * (k / 2))
+        {
+          x = x * y;
+          k = k - 1;
+        }
+      if (k == 0)
+        break;
+      y = y * y;
+      k = k / 2;
+    }
+  /* Now k == 0, hence x == 2^n.  */
+  return x;
+}
+
+/* Return 2^n.  */
+static long double
+pow2l (int n)
+{
+  int k = n;
+  volatile long double x = 1;
+  volatile long double y = 2;
+  /* Invariant: 2^n == x * y^k.  */
+  if (k < 0)
+    {
+      y = 0.5L;
+      k = - k;
+    }
+  while (k > 0)
+    {
+      if (k != 2 * (k / 2))
+        {
+          x = x * y;
+          k = k - 1;
+        }
+      if (k == 0)
+        break;
+      y = y * y;
+      k = k / 2;
+    }
+  /* Now k == 0, hence x == 2^n.  */
+  return x;
+}
+
+/* ----------------------- Check macros for 'float' ----------------------- */
+
+/* Check that the FLT_* macros expand to constant expressions.  */
+int fb[] =
+  {
+    FLT_MANT_DIG, FLT_MIN_EXP, FLT_MAX_EXP,
+    FLT_DIG, FLT_MIN_10_EXP, FLT_MAX_10_EXP
+  };
+float fc[] = { FLT_EPSILON, FLT_MIN, FLT_MAX };
+
+static void
+test_float (void)
+{
+  /* Check that the value of FLT_MIN_EXP is well parenthesized.  */
+  ASSERT ((FLT_MIN_EXP % 101111) == (FLT_MIN_EXP) % 101111);
+
+  /* Check that the value of DBL_MIN_10_EXP is well parenthesized.  */
+  ASSERT ((FLT_MIN_10_EXP % 101111) == (FLT_MIN_10_EXP) % 101111);
+
+  /* Check that 'float' is as specified in IEEE 754.  */
+  ASSERT (FLT_MANT_DIG == 24);
+  ASSERT (FLT_MIN_EXP == -125);
+  ASSERT (FLT_MAX_EXP == 128);
+
+  /* Check the value of FLT_MIN_10_EXP.  */
+  ASSERT (FLT_MIN_10_EXP == - (int) (- (FLT_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of FLT_DIG.  */
+  ASSERT (FLT_DIG == (int) ((FLT_MANT_DIG - 1) * 0.30103));
+
+  /* Check the value of FLT_MIN_10_EXP.  */
+  ASSERT (FLT_MIN_10_EXP == - (int) (- (FLT_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of FLT_MAX_10_EXP.  */
+  ASSERT (FLT_MAX_10_EXP == (int) (FLT_MAX_EXP * 0.30103));
+
+  /* Check the value of FLT_MAX.  */
+  {
+    volatile float m = FLT_MAX;
+    int n;
+
+    ASSERT (m + m > m);
+    for (n = 0; n <= 2 * FLT_MANT_DIG; n++)
+      {
+        volatile float pow2_n = pow2f (n); /* 2^n */
+        volatile float x = m + (m / pow2_n);
+        if (x > m)
+          ASSERT (x + x == x);
+        else
+          ASSERT (!(x + x == x));
+      }
+  }
+
+  /* Check the value of FLT_MIN.  */
+  {
+    volatile float m = FLT_MIN;
+    volatile float x = pow2f (FLT_MIN_EXP - 1);
+    ASSERT (m == x);
+  }
+
+  /* Check the value of FLT_EPSILON.  */
+  {
+    volatile float e = FLT_EPSILON;
+    volatile float me;
+    int n;
+
+    me = 1.0f + e;
+    ASSERT (me > 1.0f);
+    ASSERT (me - 1.0f == e);
+    for (n = 0; n <= 2 * FLT_MANT_DIG; n++)
+      {
+        volatile float half_n = pow2f (- n); /* 2^-n */
+        volatile float x = me - half_n;
+        if (x < me)
+          ASSERT (x <= 1.0f);
+      }
+  }
+}
+
+/* ----------------------- Check macros for 'double' ----------------------- */
+
+/* Check that the DBL_* macros expand to constant expressions.  */
+int db[] =
+  {
+    DBL_MANT_DIG, DBL_MIN_EXP, DBL_MAX_EXP,
+    DBL_DIG, DBL_MIN_10_EXP, DBL_MAX_10_EXP
+  };
+double dc[] = { DBL_EPSILON, DBL_MIN, DBL_MAX };
+
+static void
+test_double (void)
+{
+  /* Check that the value of DBL_MIN_EXP is well parenthesized.  */
+  ASSERT ((DBL_MIN_EXP % 101111) == (DBL_MIN_EXP) % 101111);
+
+  /* Check that the value of DBL_MIN_10_EXP is well parenthesized.  */
+  ASSERT ((DBL_MIN_10_EXP % 101111) == (DBL_MIN_10_EXP) % 101111);
+
+  /* Check that 'double' is as specified in IEEE 754.  */
+  ASSERT (DBL_MANT_DIG == 53);
+  ASSERT (DBL_MIN_EXP == -1021);
+  ASSERT (DBL_MAX_EXP == 1024);
+
+  /* Check the value of DBL_MIN_10_EXP.  */
+  ASSERT (DBL_MIN_10_EXP == - (int) (- (DBL_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of DBL_DIG.  */
+  ASSERT (DBL_DIG == (int) ((DBL_MANT_DIG - 1) * 0.30103));
+
+  /* Check the value of DBL_MIN_10_EXP.  */
+  ASSERT (DBL_MIN_10_EXP == - (int) (- (DBL_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of DBL_MAX_10_EXP.  */
+  ASSERT (DBL_MAX_10_EXP == (int) (DBL_MAX_EXP * 0.30103));
+
+  /* Check the value of DBL_MAX.  */
+  {
+    volatile double m = DBL_MAX;
+    int n;
+
+    ASSERT (m + m > m);
+    for (n = 0; n <= 2 * DBL_MANT_DIG; n++)
+      {
+        volatile double pow2_n = pow2d (n); /* 2^n */
+        volatile double x = m + (m / pow2_n);
+        if (x > m)
+          ASSERT (x + x == x);
+        else
+          ASSERT (!(x + x == x));
+      }
+  }
+
+  /* Check the value of DBL_MIN.  */
+  {
+    volatile double m = DBL_MIN;
+    volatile double x = pow2d (DBL_MIN_EXP - 1);
+    ASSERT (m == x);
+  }
+
+  /* Check the value of DBL_EPSILON.  */
+  {
+    volatile double e = DBL_EPSILON;
+    volatile double me;
+    int n;
+
+    me = 1.0 + e;
+    ASSERT (me > 1.0);
+    ASSERT (me - 1.0 == e);
+    for (n = 0; n <= 2 * DBL_MANT_DIG; n++)
+      {
+        volatile double half_n = pow2d (- n); /* 2^-n */
+        volatile double x = me - half_n;
+        if (x < me)
+          ASSERT (x <= 1.0);
+      }
+  }
+}
+
+/* -------------------- Check macros for 'long double' -------------------- */
+
+/* Check that the LDBL_* macros expand to constant expressions.  */
+int lb[] =
+  {
+    LDBL_MANT_DIG, LDBL_MIN_EXP, LDBL_MAX_EXP,
+    LDBL_DIG, LDBL_MIN_10_EXP, LDBL_MAX_10_EXP
+  };
+long double lc1 = LDBL_EPSILON;
+long double lc2 = LDBL_MIN;
+#if 0 /* LDBL_MAX is not a constant expression on some platforms.  */
+long double lc3 = LDBL_MAX;
+#endif
+
+static void
+test_long_double (void)
+{
+  /* Check that the value of LDBL_MIN_EXP is well parenthesized.  */
+  ASSERT ((LDBL_MIN_EXP % 101111) == (LDBL_MIN_EXP) % 101111);
+
+  /* Check that the value of LDBL_MIN_10_EXP is well parenthesized.  */
+  ASSERT ((LDBL_MIN_10_EXP % 101111) == (LDBL_MIN_10_EXP) % 101111);
+
+  /* Check that 'long double' is at least as wide as 'double'.  */
+  ASSERT (LDBL_MANT_DIG >= DBL_MANT_DIG);
+  ASSERT (LDBL_MIN_EXP - LDBL_MANT_DIG <= DBL_MIN_EXP - DBL_MANT_DIG);
+  ASSERT (LDBL_MAX_EXP >= DBL_MAX_EXP);
+
+  /* Check the value of LDBL_DIG.  */
+  ASSERT (LDBL_DIG == (int)((LDBL_MANT_DIG - 1) * 0.30103));
+
+  /* Check the value of LDBL_MIN_10_EXP.  */
+  ASSERT (LDBL_MIN_10_EXP == - (int) (- (LDBL_MIN_EXP - 1) * 0.30103));
+
+  /* Check the value of LDBL_MAX_10_EXP.  */
+  ASSERT (LDBL_MAX_10_EXP == (int) (LDBL_MAX_EXP * 0.30103));
+
+  /* Check the value of LDBL_MAX.  */
+  {
+    volatile long double m = LDBL_MAX;
+    int n;
+
+    ASSERT (m + m > m);
+    for (n = 0; n <= 2 * LDBL_MANT_DIG; n++)
+      {
+        volatile long double pow2_n = pow2l (n); /* 2^n */
+        volatile long double x = m + (m / pow2_n);
+        if (x > m)
+          ASSERT (x + x == x);
+        else
+          ASSERT (!(x + x == x));
+      }
+  }
+
+  /* Check the value of LDBL_MIN.  */
+  {
+    volatile long double m = LDBL_MIN;
+    volatile long double x = pow2l (LDBL_MIN_EXP - 1);
+    ASSERT (m == x);
+  }
+
+  /* Check the value of LDBL_EPSILON.  */
+  {
+    volatile long double e = LDBL_EPSILON;
+    volatile long double me;
+    int n;
+
+    me = 1.0L + e;
+    ASSERT (me > 1.0L);
+    ASSERT (me - 1.0L == e);
+    for (n = 0; n <= 2 * LDBL_MANT_DIG; n++)
+      {
+        volatile long double half_n = pow2l (- n); /* 2^-n */
+        volatile long double x = me - half_n;
+        if (x < me)
+          ASSERT (x <= 1.0L);
+      }
+  }
+}
+
+int
+main ()
+{
+  test_float ();
+  test_double ();
+
+  {
+    DECL_LONG_DOUBLE_ROUNDING
+
+    BEGIN_LONG_DOUBLE_ROUNDING ();
+
+    test_long_double ();
+
+    END_LONG_DOUBLE_ROUNDING ();
+  }
+
+  return 0;
+}
+
+#else
+
+int
+main ()
+{
+  fprintf (stderr, "Skipping test: FLT_RADIX is not 2.\n");
+  return 77;
+}
+
+#endif
diff --git a/src/gl/tests/test-fopen-gnu.c b/src/gl/tests/test-fopen-gnu.c
new file mode 100644
index 0000000..26c5762
--- /dev/null
+++ b/src/gl/tests/test-fopen-gnu.c
@@ -0,0 +1,88 @@
+/* Test of opening a file stream.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define BASE "test-fopen-gnu.t"
+
+/* 0x1a is an EOF on Windows.  */
+#define DATA "abc\x1axyz"
+
+int
+main (void)
+{
+  FILE *f;
+  int fd;
+  int flags;
+  char buf[16];
+
+  /* Remove anything from prior partial run.  */
+  unlink (BASE "file");
+  unlink (BASE "binary");
+
+  /* Create the file.  */
+  f = fopen (BASE "file", "w");
+  ASSERT (f);
+  fd = fileno (f);
+  ASSERT (fd >= 0);
+  flags = fcntl (fd, F_GETFD);
+  ASSERT (flags >= 0);
+  ASSERT ((flags & FD_CLOEXEC) == 0);
+  ASSERT (fclose (f) == 0);
+
+  /* Create the file and check the 'e' mode.  */
+  f = fopen (BASE "file", "we");
+  ASSERT (f);
+  fd = fileno (f);
+  ASSERT (fd >= 0);
+  flags = fcntl (fd, F_GETFD);
+  ASSERT (flags >= 0);
+  ASSERT ((flags & FD_CLOEXEC) != 0);
+  ASSERT (fclose (f) == 0);
+
+  /* Open the file and check the 'x' mode.  */
+  f = fopen (BASE "file", "ax");
+  ASSERT (f == NULL);
+  ASSERT (errno == EEXIST);
+
+  /* Open a binary file and check that the 'e' mode doesn't interfere.  */
+  f = fopen (BASE "binary", "wbe");
+  ASSERT (f);
+  ASSERT (fwrite (DATA, 1, sizeof (DATA)-1, f) == sizeof (DATA)-1);
+  ASSERT (fclose (f) == 0);
+
+  f = fopen (BASE "binary", "rbe");
+  ASSERT (f);
+  ASSERT (fread (buf, 1, sizeof (buf), f) == sizeof (DATA)-1);
+  ASSERT (fclose (f) == 0);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "binary") == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-fopen.c b/src/gl/tests/test-fopen.c
new file mode 100644
index 0000000..f69a13a
--- /dev/null
+++ b/src/gl/tests/test-fopen.c
@@ -0,0 +1,34 @@
+/* Test of opening a file stream.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fopen, FILE *, (char const *, char const *));
+
+#define BASE "test-fopen.t"
+
+#include "test-fopen.h"
+
+int
+main (void)
+{
+  return test_fopen ();
+}
diff --git a/src/gl/tests/test-fopen.h b/src/gl/tests/test-fopen.h
new file mode 100644
index 0000000..b6a3dcb
--- /dev/null
+++ b/src/gl/tests/test-fopen.h
@@ -0,0 +1,89 @@
+/* Test of opening a file stream.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+/* Include <config.h> and a form of <stdio.h> first.  */
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+/* Test fopen.  Assumes BASE is defined.  */
+
+static int
+test_fopen (void)
+{
+  FILE *f;
+  /* Remove anything from prior partial run.  */
+  unlink (BASE "file");
+
+  /* Read requires existing file.  */
+  errno = 0;
+  ASSERT (fopen (BASE "file", "r") == NULL);
+  ASSERT (errno == ENOENT);
+
+  /* Write can create a file.  */
+  f = fopen (BASE "file", "w");
+  ASSERT (f);
+  ASSERT (fclose (f) == 0);
+
+  /* Trailing slash is invalid on non-directory.  */
+  errno = 0;
+  ASSERT (fopen (BASE "file/", "r") == NULL);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
+
+  errno = 0;
+  ASSERT (fopen (BASE "file/", "r+") == NULL);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
+
+  /* Cannot create a directory.  */
+  errno = 0;
+  ASSERT (fopen ("nonexist.ent/", "w") == NULL);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == ENOENT
+          || errno == EINVAL);
+
+  /* Directories cannot be opened for writing.  */
+  errno = 0;
+  ASSERT (fopen (".", "w") == NULL);
+  ASSERT (errno == EISDIR || errno == EINVAL || errno == EACCES);
+
+  errno = 0;
+  ASSERT (fopen ("./", "w") == NULL);
+  ASSERT (errno == EISDIR || errno == EINVAL || errno == EACCES);
+
+  errno = 0;
+  ASSERT (fopen (".", "r+") == NULL);
+  ASSERT (errno == EISDIR || errno == EINVAL || errno == EACCES);
+
+  errno = 0;
+  ASSERT (fopen ("./", "r+") == NULL);
+  ASSERT (errno == EISDIR || errno == EINVAL || errno == EACCES);
+
+  /* /dev/null must exist, and be writable.  */
+  f = fopen ("/dev/null", "r");
+  ASSERT (f);
+  ASSERT (fclose (f) == 0);
+  f = fopen ("/dev/null", "w");
+  ASSERT (f);
+  ASSERT (fclose (f) == 0);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-fpending.c b/src/gl/tests/test-fpending.c
new file mode 100644
index 0000000..bf79f71
--- /dev/null
+++ b/src/gl/tests/test-fpending.c
@@ -0,0 +1,41 @@
+/* Ensure that __fpending works.
+
+   Copyright (C) 2004, 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+   Written by Jim Meyering.  */
+
+#include <config.h>
+
+#include "fpending.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  ASSERT (__fpending (stdout) == 0);
+
+  fputs ("foo", stdout);
+  ASSERT (__fpending (stdout) == 3);
+
+  fflush (stdout);
+  ASSERT (__fpending (stdout) == 0);
+
+  exit (0);
+}
diff --git a/src/gl/tests/test-fpending.sh b/src/gl/tests/test-fpending.sh
new file mode 100755
index 0000000..abe7d83
--- /dev/null
+++ b/src/gl/tests/test-fpending.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+tmpfile=
+trap 'rm -fr $tmpfile' 1 2 3 15
+
+tmpfile=test-fpending.t
+
+${CHECKER} ./test-fpending${EXEEXT} > $tmpfile || exit 1
+
+rm -fr $tmpfile
+
+exit 0
diff --git a/src/gl/tests/test-fputc.c b/src/gl/tests/test-fputc.c
new file mode 100644
index 0000000..47bb844
--- /dev/null
+++ b/src/gl/tests/test-fputc.c
@@ -0,0 +1,93 @@
+/* Test of fputc() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fputc, int, (int, FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = "test-fputc.txt";
+
+  /* We don't have an fputc() function that installs an invalid parameter
+     handler so far.  So install that handler here, explicitly.  */
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+  gl_msvc_inval_ensure_handler ();
+#endif
+
+  /* Test that fputc() on an unbuffered stream sets errno if someone else
+     closes the stream fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "w");
+    ASSERT (fp != NULL);
+    setvbuf (fp, NULL, _IONBF, 0);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fputc ('x', fp) == EOF);
+    ASSERT (errno == EBADF);
+    ASSERT (ferror (fp));
+    fclose (fp);
+  }
+
+  /* Test that fputc() on an unbuffered stream sets errno if the stream
+     was constructed with an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "w");
+    if (fp != NULL)
+      {
+        setvbuf (fp, NULL, _IONBF, 0);
+        errno = 0;
+        ASSERT (fputc ('x', fp) == EOF);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "w");
+    if (fp != NULL)
+      {
+        setvbuf (fp, NULL, _IONBF, 0);
+        errno = 0;
+        ASSERT (fputc ('x', fp) == EOF);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-fread.c b/src/gl/tests/test-fread.c
new file mode 100644
index 0000000..f8214ca
--- /dev/null
+++ b/src/gl/tests/test-fread.c
@@ -0,0 +1,102 @@
+/* Test of fread() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fread, size_t, (void *, size_t, size_t, FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = "test-fread.txt";
+
+  /* We don't have an fread() function that installs an invalid parameter
+     handler so far.  So install that handler here, explicitly.  */
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+  gl_msvc_inval_ensure_handler ();
+#endif
+
+  /* Prepare a file.  */
+  {
+    const char text[] = "hello world";
+    int fd = open (filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
+    ASSERT (fd >= 0);
+    ASSERT (write (fd, text, sizeof (text)) == sizeof (text));
+    ASSERT (close (fd) == 0);
+  }
+
+  /* Test that fread() sets errno if someone else closes the stream
+     fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "r");
+    char buf[5];
+    ASSERT (fp != NULL);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fread (buf, 1, sizeof (buf), fp) == 0);
+    ASSERT (errno == EBADF);
+    ASSERT (ferror (fp));
+    fclose (fp);
+  }
+
+  /* Test that fread() sets errno if the stream was constructed with
+     an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "r");
+    if (fp != NULL)
+      {
+        char buf[1];
+        errno = 0;
+        ASSERT (fread (buf, 1, 1, fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "r");
+    if (fp != NULL)
+      {
+        char buf[1];
+        errno = 0;
+        ASSERT (fread (buf, 1, 1, fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-free.c b/src/gl/tests/test-free.c
new file mode 100644
index 0000000..53f1085
--- /dev/null
+++ b/src/gl/tests/test-free.c
@@ -0,0 +1,175 @@
+/* Test of free() function.
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#if defined __linux__
+# include <fcntl.h>
+# include <stdint.h>
+# include <string.h>
+# include <sys/mman.h>
+#endif
+
+#include "macros.h"
+
+/* The indirection through a volatile function pointer is necessary to prevent
+   a GCC optimization.  Without it, when optimizing, GCC would "know" that errno
+   is unchanged by calling free(ptr), when ptr was the result of a malloc(...)
+   call in the same function.  */
+static int
+get_errno (void)
+{
+  volatile int err = errno;
+  return err;
+}
+
+static int (* volatile get_errno_func) (void) = get_errno;
+
+int
+main ()
+{
+  /* Check that free() preserves errno.  */
+  {
+    errno = 1789; /* Liberté, égalité, fraternité.  */
+    free (NULL);
+    ASSERT_NO_STDIO (get_errno_func () == 1789);
+  }
+  { /* Small memory allocations.  */
+    #define N 10000
+    void * volatile ptrs[N];
+    size_t i;
+    for (i = 0; i < N; i++)
+      ptrs[i] = malloc (15);
+    for (i = 0; i < N; i++)
+      {
+        errno = 1789;
+        free (ptrs[i]);
+        ASSERT_NO_STDIO (get_errno_func () == 1789);
+      }
+    #undef N
+  }
+  { /* Medium memory allocations.  */
+    #define N 1000
+    void * volatile ptrs[N];
+    size_t i;
+    for (i = 0; i < N; i++)
+      ptrs[i] = malloc (729);
+    for (i = 0; i < N; i++)
+      {
+        errno = 1789;
+        free (ptrs[i]);
+        ASSERT_NO_STDIO (get_errno_func () == 1789);
+      }
+    #undef N
+  }
+  { /* Large memory allocations.  */
+    #define N 10
+    void * volatile ptrs[N];
+    size_t i;
+    for (i = 0; i < N; i++)
+      ptrs[i] = malloc (5318153);
+    for (i = 0; i < N; i++)
+      {
+        errno = 1789;
+        free (ptrs[i]);
+        ASSERT_NO_STDIO (get_errno_func () == 1789);
+      }
+    #undef N
+  }
+
+  /* Test a less common code path.
+     When malloc() is based on mmap(), free() can sometimes call munmap().
+     munmap() usually succeeds, but fails in a particular situation: when
+       - it has to unmap the middle part of a VMA, and
+       - the number of VMAs of a process is limited and the limit is
+         already reached.
+     The latter condition is fulfilled on Linux, when the file
+     /proc/sys/vm/max_map_count exists.  This file contains the limit
+       - for Linux >= 2.4.19: 65536 (DEFAULT_MAX_MAP_COUNT in linux/include/linux/sched.h)
+       - for Linux >= 2.6.31: 65530 (DEFAULT_MAX_MAP_COUNT in linux/include/linux/mm.h).
+     But do not test it with glibc < 2.15, since that triggers a glibc internal
+     abort: "malloc.c:3551: munmap_chunk: Assertion `ret == 0' failed."
+   */
+  #if defined __linux__ && !(__GLIBC__ == 2 && __GLIBC_MINOR__ < 15)
+  if (open ("/proc/sys/vm/max_map_count", O_RDONLY) >= 0)
+    {
+      /* Preparations.  */
+      size_t pagesize = getpagesize ();
+      void *firstpage_backup = malloc (pagesize);
+      void *lastpage_backup = malloc (pagesize);
+      /* Allocate a large memory area, as a bumper, so that the MAP_FIXED
+         allocation later will not overwrite parts of the memory areas
+         allocated to ld.so or libc.so.  */
+      void *bumper_region =
+        mmap (NULL, 0x1000000, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+      /* A file descriptor pointing to a regular file.  */
+      int fd = open ("test-free", O_RDONLY);
+
+      if (firstpage_backup != NULL && lastpage_backup != NULL
+          && bumper_region != (void *)(-1)
+          && fd >= 0)
+        {
+          /* Do a large memory allocation.  */
+          size_t big_size = 0x1000000;
+          void * volatile ptr = malloc (big_size - 0x100);
+          char *ptr_aligned = (char *) ((uintptr_t) ptr & ~(pagesize - 1));
+          /* This large memory allocation allocated a memory area
+             from ptr_aligned to ptr_aligned + big_size.
+             Enlarge this memory area by adding a page before and a page
+             after it.  */
+          memcpy (firstpage_backup, ptr_aligned, pagesize);
+          memcpy (lastpage_backup, ptr_aligned + big_size - pagesize, pagesize);
+          if (mmap (ptr_aligned - pagesize, pagesize + big_size + pagesize,
+                    PROT_READ | PROT_WRITE,
+                    MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0)
+              != (void *)(-1))
+            {
+              memcpy (ptr_aligned, firstpage_backup, pagesize);
+              memcpy (ptr_aligned + big_size - pagesize, lastpage_backup, pagesize);
+
+              /* Now add as many mappings as we can.
+                 Stop at 65536, in order not to crash the machine (in case the
+                 limit has been increased by the system administrator).  */
+              size_t i;
+              for (i = 0; i < 65536; i++)
+                if (mmap (NULL, pagesize, PROT_READ, MAP_FILE | MAP_PRIVATE, fd, 0)
+                    == (void *)(-1))
+                  break;
+              /* Now the number of VMAs of this process has hopefully attained
+                 its limit.  */
+
+              errno = 1789;
+              /* This call to free() is supposed to call
+                   munmap (ptr_aligned, big_size);
+                 which increases the number of VMAs by 1, which is supposed
+                 to fail.  */
+              free (ptr);
+              ASSERT_NO_STDIO (get_errno_func () == 1789);
+            }
+        }
+    }
+  #endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-fseek.c b/src/gl/tests/test-fseek.c
new file mode 100644
index 0000000..d827fbb
--- /dev/null
+++ b/src/gl/tests/test-fseek.c
@@ -0,0 +1,70 @@
+/* Test of fseek() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+/* None of the files accessed by this test are large, so disable the
+   fseek link warning if the user requested GNULIB_POSIXCHECK.  */
+#define _GL_NO_LARGE_FILES
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fseek, int, (FILE *, long, int));
+
+#include "macros.h"
+
+#ifndef FUNC_UNGETC_BROKEN
+# define FUNC_UNGETC_BROKEN 0
+#endif
+
+int
+main (int argc, char **argv)
+{
+  /* Assume stdin is non-empty, seekable, and starts with '#!/bin/sh'
+     iff argc > 1.  */
+  int expected = argc > 1 ? 0 : -1;
+  ASSERT (fseek (stdin, 0, SEEK_CUR) == expected);
+  if (argc > 1)
+    {
+      /* Test that fseek discards previously read ungetc data.  */
+      int ch = fgetc (stdin);
+      ASSERT (ch == '#');
+      ASSERT (ungetc (ch, stdin) == ch);
+      ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
+      ch = fgetc (stdin);
+      ASSERT (ch == '/');
+      if (2 < argc)
+        {
+          if (FUNC_UNGETC_BROKEN)
+            {
+              fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
+                     stderr);
+              return 77;
+            }
+          /* Test that fseek discards random ungetc data.  */
+          ASSERT (ungetc (ch ^ 0xff, stdin) == (ch ^ 0xff));
+        }
+      ASSERT (fseek (stdin, 0, SEEK_END) == 0);
+      ASSERT (fgetc (stdin) == EOF);
+      /* Test that fseek resets end-of-file marker.  */
+      ASSERT (feof (stdin));
+      ASSERT (fseek (stdin, 0, SEEK_END) == 0);
+      ASSERT (!feof (stdin));
+    }
+  return 0;
+}
diff --git a/src/gl/tests/test-fseek.sh b/src/gl/tests/test-fseek.sh
new file mode 100755
index 0000000..4ad3fda
--- /dev/null
+++ b/src/gl/tests/test-fseek.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+${CHECKER} ./test-fseek${EXEEXT} 1 < "$srcdir/test-fseek.sh" || exit 1
+echo hi | ${CHECKER} ./test-fseek${EXEEXT} || exit 1
+exit 0
diff --git a/src/gl/tests/test-fseek2.sh b/src/gl/tests/test-fseek2.sh
new file mode 100755
index 0000000..beadc98
--- /dev/null
+++ b/src/gl/tests/test-fseek2.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec ${CHECKER} ./test-fseek${EXEEXT} 1 2 < "$srcdir/test-fseek2.sh"
diff --git a/src/gl/tests/test-fseeko.c b/src/gl/tests/test-fseeko.c
new file mode 100644
index 0000000..ce6c212
--- /dev/null
+++ b/src/gl/tests/test-fseeko.c
@@ -0,0 +1,74 @@
+/* Test of fseeko() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+/* None of the files accessed by this test are large, so disable the
+   fseek link warning if we are not using the gnulib fseek module.  */
+#define _GL_NO_LARGE_FILES
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fseeko, int, (FILE *, off_t, int));
+
+
+#include "macros.h"
+
+#ifndef FUNC_UNGETC_BROKEN
+# define FUNC_UNGETC_BROKEN 0
+#endif
+
+int
+main (int argc, char **argv _GL_UNUSED)
+{
+  /* Assume stdin is non-empty, seekable, and starts with '#!/bin/sh'
+     iff argc > 1.  */
+  int expected = argc > 1 ? 0 : -1;
+  /* Exit with success only if fseek/fseeko agree.  */
+  int r1 = fseeko (stdin, 0, SEEK_CUR);
+  int r2 = fseek (stdin, 0, SEEK_CUR);
+  ASSERT (r1 == r2 && r1 == expected);
+  if (argc > 1)
+    {
+      /* Test that fseek discards previously read ungetc data.  */
+      int ch = fgetc (stdin);
+      ASSERT (ch == '#');
+      ASSERT (ungetc (ch, stdin) == ch);
+      ASSERT (fseeko (stdin, 2, SEEK_SET) == 0);
+      ch = fgetc (stdin);
+      ASSERT (ch == '/');
+      if (2 < argc)
+        {
+          if (FUNC_UNGETC_BROKEN)
+            {
+              fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
+                     stderr);
+              return 77;
+            }
+          /* Test that fseek discards random ungetc data.  */
+          ASSERT (ungetc (ch ^ 0xff, stdin) == (ch ^ 0xff));
+        }
+      ASSERT (fseeko (stdin, 0, SEEK_END) == 0);
+      ASSERT (fgetc (stdin) == EOF);
+      /* Test that fseek resets end-of-file marker.  */
+      ASSERT (feof (stdin));
+      ASSERT (fseeko (stdin, 0, SEEK_END) == 0);
+      ASSERT (!feof (stdin));
+    }
+  return 0;
+}
diff --git a/src/gl/tests/test-fseeko.sh b/src/gl/tests/test-fseeko.sh
new file mode 100755
index 0000000..c7b675e
--- /dev/null
+++ b/src/gl/tests/test-fseeko.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+${CHECKER} ./test-fseeko${EXEEXT} 1 < "$srcdir/test-fseeko.sh" || exit 1
+echo hi | ${CHECKER} ./test-fseeko${EXEEXT} || exit 1
+exit 0
diff --git a/src/gl/tests/test-fseeko2.sh b/src/gl/tests/test-fseeko2.sh
new file mode 100755
index 0000000..7bf315e
--- /dev/null
+++ b/src/gl/tests/test-fseeko2.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec ${CHECKER} ./test-fseeko${EXEEXT} 1 2 < "$srcdir/test-fseeko2.sh"
diff --git a/src/gl/tests/test-fseeko3.c b/src/gl/tests/test-fseeko3.c
new file mode 100644
index 0000000..0d45d17
--- /dev/null
+++ b/src/gl/tests/test-fseeko3.c
@@ -0,0 +1,51 @@
+/* Test of fseeko() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <eblake@redhat.com>, 2011.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <stdlib.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  int do_initial_ftell = atoi (argv[1]);
+  const char *filename = argv[2];
+  FILE *fp = fopen (filename, "r");
+  ASSERT (fp != NULL);
+
+  if (do_initial_ftell)
+    {
+      off_t pos = ftell (fp);
+      ASSERT (pos == 0);
+    }
+
+  ASSERT (fseeko (fp, 0, SEEK_END) == 0);
+
+  {
+    off_t pos = ftell (fp);
+    ASSERT (pos > 0);
+  }
+
+  ASSERT (fclose (fp) == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-fseeko3.sh b/src/gl/tests/test-fseeko3.sh
new file mode 100755
index 0000000..254d0cb
--- /dev/null
+++ b/src/gl/tests/test-fseeko3.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+${CHECKER} ./test-fseeko3${EXEEXT} 0 "$srcdir/test-fseeko3.sh" || exit 1
+
+${CHECKER} ./test-fseeko3${EXEEXT} 1 "$srcdir/test-fseeko3.sh" || exit 1
+
+exit 0
diff --git a/src/gl/tests/test-fseeko4.c b/src/gl/tests/test-fseeko4.c
new file mode 100644
index 0000000..219f1ea
--- /dev/null
+++ b/src/gl/tests/test-fseeko4.c
@@ -0,0 +1,73 @@
+/* Test of fseeko() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = argv[1];
+
+  /* Test that fseeko() sets errno if someone else closes the stream
+     fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "r");
+    ASSERT (fp != NULL);
+    setvbuf (fp, NULL, _IONBF, 0);
+    ASSERT (ftell (fp) == 0);
+    ASSERT (fseeko (fp, 0, SEEK_END) == 0);
+    ASSERT (ftell (fp) > 0);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fseeko (fp, 0, SEEK_SET) == -1);
+    ASSERT (errno == EBADF);
+    fclose (fp);
+  }
+
+  /* Test that fseeko() sets errno if the stream was constructed with
+     an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "w");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (fseeko (fp, 0, SEEK_END) == -1);
+        ASSERT (errno == EBADF);
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "w");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (fseeko (fp, 0, SEEK_END) == -1);
+        ASSERT (errno == EBADF);
+        fclose (fp);
+      }
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-fseeko4.sh b/src/gl/tests/test-fseeko4.sh
new file mode 100755
index 0000000..7a4d352
--- /dev/null
+++ b/src/gl/tests/test-fseeko4.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+${CHECKER} ./test-fseeko4${EXEEXT} "$srcdir/test-fseeko4.sh" || exit 1
+
+exit 0
diff --git a/src/gl/tests/test-fstat.c b/src/gl/tests/test-fstat.c
new file mode 100644
index 0000000..0d78e17
--- /dev/null
+++ b/src/gl/tests/test-fstat.c
@@ -0,0 +1,50 @@
+/* Tests of fstat() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fstat, int, (int, struct stat *));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct stat statbuf;
+
+    errno = 0;
+    ASSERT (fstat (-1, &statbuf) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    struct stat statbuf;
+
+    close (99);
+    errno = 0;
+    ASSERT (fstat (99, &statbuf) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-ftell.c b/src/gl/tests/test-ftell.c
new file mode 100644
index 0000000..a9de72b
--- /dev/null
+++ b/src/gl/tests/test-ftell.c
@@ -0,0 +1,107 @@
+/* Test of ftell() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+/* None of the files accessed by this test are large, so disable the
+   fseek link warning if we are not using the gnulib fseek module.  */
+#define _GL_NO_LARGE_FILES
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (ftell, long, (FILE *));
+
+#include "binary-io.h"
+#include "macros.h"
+
+#ifndef FUNC_UNGETC_BROKEN
+# define FUNC_UNGETC_BROKEN 0
+#endif
+
+int
+main (int argc, char **argv)
+{
+  int ch;
+  /* Assume stdin is seekable iff argc > 1.  */
+  if (argc == 1)
+    {
+      ASSERT (ftell (stdin) == -1);
+      return 0;
+    }
+
+  /* mingw ftell is unreliable on text mode input.  */
+  set_binary_mode (0, O_BINARY);
+
+  /* Simple tests.  */
+  ASSERT (ftell (stdin) == 0);
+
+  ch = fgetc (stdin);
+  ASSERT (ch == '#');
+  ASSERT (ftell (stdin) == 1);
+
+  /* Test ftell after ungetc of read input.  */
+  ch = ungetc ('#', stdin);
+  ASSERT (ch == '#');
+  ASSERT (ftell (stdin) == 0);
+
+  ch = fgetc (stdin);
+  ASSERT (ch == '#');
+  ASSERT (ftell (stdin) == 1);
+
+  /* Test ftell after fseek.  */
+  ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
+  ASSERT (ftell (stdin) == 2);
+
+  /* Test ftell after random ungetc.  */
+  ch = fgetc (stdin);
+  ASSERT (ch == '/');
+  ch = ungetc ('@', stdin);
+  ASSERT (ch == '@');
+  ASSERT (ftell (stdin) == 2);
+
+  ch = fgetc (stdin);
+  ASSERT (ch == '@');
+  ASSERT (ftell (stdin) == 3);
+
+  if (2 < argc)
+    {
+      if (FUNC_UNGETC_BROKEN)
+        {
+          fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
+                 stderr);
+          return 77;
+        }
+      /* Test ftell after ungetc without read.  */
+      ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
+      ASSERT (ftell (stdin) == 3);
+
+      ch = ungetc ('~', stdin);
+      ASSERT (ch == '~');
+      ASSERT (ftell (stdin) == 2);
+    }
+
+#if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */
+  /* Test ftell beyond end of file.  */
+  ASSERT (fseek (stdin, 0, SEEK_END) == 0);
+  ch = ftell (stdin);
+  ASSERT (fseek (stdin, 10, SEEK_END) == 0);
+  ASSERT (ftell (stdin) == ch + 10);
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-ftell.sh b/src/gl/tests/test-ftell.sh
new file mode 100755
index 0000000..5c27808
--- /dev/null
+++ b/src/gl/tests/test-ftell.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+${CHECKER} ./test-ftell${EXEEXT} 1 < "$srcdir/test-ftell.sh" || exit 1
+echo hi | ${CHECKER} ./test-ftell${EXEEXT} || exit 1
+exit 0
diff --git a/src/gl/tests/test-ftell2.sh b/src/gl/tests/test-ftell2.sh
new file mode 100755
index 0000000..7d116d2
--- /dev/null
+++ b/src/gl/tests/test-ftell2.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec ${CHECKER} ./test-ftell${EXEEXT} 1 2 < "$srcdir/test-ftell2.sh"
diff --git a/src/gl/tests/test-ftell3.c b/src/gl/tests/test-ftell3.c
new file mode 100644
index 0000000..98df004
--- /dev/null
+++ b/src/gl/tests/test-ftell3.c
@@ -0,0 +1,78 @@
+/* Test of ftell() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* None of the files accessed by this test are large, so disable the
+   fseek link warning if we are not using the gnulib fseek module.  */
+#define _GL_NO_LARGE_FILES
+#include <stdio.h>
+
+#include <string.h>
+
+#include "macros.h"
+
+#define TESTFILE "t-ftell3.tmp"
+
+int
+main (void)
+{
+  FILE *fp;
+
+  /* Create a file with some contents.  */
+  fp = fopen (TESTFILE, "w");
+  if (fp == NULL)
+    goto skip;
+  if (fwrite ("foogarsh", 1, 8, fp) < 8)
+    goto skip;
+  if (fclose (fp))
+    goto skip;
+
+  /* The file's contents is now "foogarsh".  */
+
+  /* Try writing after reading to EOF.  */
+  fp = fopen (TESTFILE, "r+");
+  if (fp == NULL)
+    goto skip;
+  if (fseek (fp, -1, SEEK_END))
+    goto skip;
+  ASSERT (getc (fp) == 'h');
+  ASSERT (getc (fp) == EOF);
+  ASSERT (ftell (fp) == 8);
+  ASSERT (ftell (fp) == 8);
+  ASSERT (putc ('!', fp) == '!');
+  ASSERT (ftell (fp) == 9);
+  ASSERT (fclose (fp) == 0);
+  fp = fopen (TESTFILE, "r");
+  if (fp == NULL)
+    goto skip;
+  {
+    char buf[10];
+    ASSERT (fread (buf, 1, 10, fp) == 9);
+    ASSERT (memcmp (buf, "foogarsh!", 9) == 0);
+  }
+  ASSERT (fclose (fp) == 0);
+
+  /* The file's contents is now "foogarsh!".  */
+
+  remove (TESTFILE);
+  return 0;
+
+ skip:
+  fprintf (stderr, "Skipping test: prerequisite file operations failed.\n");
+  remove (TESTFILE);
+  return 77;
+}
diff --git a/src/gl/tests/test-ftello.c b/src/gl/tests/test-ftello.c
new file mode 100644
index 0000000..f74d5c6
--- /dev/null
+++ b/src/gl/tests/test-ftello.c
@@ -0,0 +1,118 @@
+/* Test of ftello() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+/* None of the files accessed by this test are large, so disable the
+   fseek link warning if we are not using the gnulib fseek module.  */
+#define _GL_NO_LARGE_FILES
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (ftello, off_t, (FILE *));
+
+#include "binary-io.h"
+#include "macros.h"
+
+#ifndef FUNC_UNGETC_BROKEN
+# define FUNC_UNGETC_BROKEN 0
+#endif
+
+int
+main (int argc, char **argv _GL_UNUSED)
+{
+  int ch;
+  /* Assume stdin is seekable iff argc > 1.  */
+  if (argc == 1)
+    {
+      ASSERT (ftell (stdin) == -1);
+      ASSERT (ftello (stdin) == -1);
+      return 0;
+    }
+
+  /* mingw ftell is unreliable on text mode input.  */
+  set_binary_mode (0, O_BINARY);
+
+  /* Simple tests.  For each test, make sure ftell and ftello agree.  */
+  ASSERT (ftell (stdin) == 0);
+  ASSERT (ftello (stdin) == 0);
+
+  ch = fgetc (stdin);
+  ASSERT (ch == '#');
+  ASSERT (ftell (stdin) == 1);
+  ASSERT (ftello (stdin) == 1);
+
+  /* Test ftell after ungetc of read input.  */
+  ch = ungetc ('#', stdin);
+  ASSERT (ch == '#');
+  ASSERT (ftell (stdin) == 0);
+  ASSERT (ftello (stdin) == 0);
+
+  ch = fgetc (stdin);
+  ASSERT (ch == '#');
+  ASSERT (ftell (stdin) == 1);
+  ASSERT (ftello (stdin) == 1);
+
+  /* Test ftell after fseek.  */
+  ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
+  ASSERT (ftell (stdin) == 2);
+  ASSERT (ftello (stdin) == 2);
+
+  /* Test ftell after random ungetc.  */
+  ch = fgetc (stdin);
+  ASSERT (ch == '/');
+  ch = ungetc ('@', stdin);
+  ASSERT (ch == '@');
+  ASSERT (ftell (stdin) == 2);
+  ASSERT (ftello (stdin) == 2);
+
+  ch = fgetc (stdin);
+  ASSERT (ch == '@');
+  ASSERT (ftell (stdin) == 3);
+  ASSERT (ftello (stdin) == 3);
+
+  if (2 < argc)
+    {
+      if (FUNC_UNGETC_BROKEN)
+        {
+          fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
+                 stderr);
+          return 77;
+        }
+      /* Test ftell after ungetc without read.  */
+      ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
+      ASSERT (ftell (stdin) == 3);
+      ASSERT (ftello (stdin) == 3);
+
+      ch = ungetc ('~', stdin);
+      ASSERT (ch == '~');
+      ASSERT (ftell (stdin) == 2);
+      ASSERT (ftello (stdin) == 2);
+    }
+
+#if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */
+  /* Test ftell beyond end of file.  */
+  ASSERT (fseek (stdin, 0, SEEK_END) == 0);
+  ch = ftello (stdin);
+  ASSERT (fseek (stdin, 10, SEEK_END) == 0);
+  ASSERT (ftell (stdin) == ch + 10);
+  ASSERT (ftello (stdin) == ch + 10);
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-ftello.sh b/src/gl/tests/test-ftello.sh
new file mode 100755
index 0000000..e8db061
--- /dev/null
+++ b/src/gl/tests/test-ftello.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+${CHECKER} ./test-ftello${EXEEXT} 1 < "$srcdir/test-ftello.sh" || exit 1
+echo hi | ${CHECKER} ./test-ftello${EXEEXT} || exit 1
+exit 0
diff --git a/src/gl/tests/test-ftello2.sh b/src/gl/tests/test-ftello2.sh
new file mode 100755
index 0000000..63a222c
--- /dev/null
+++ b/src/gl/tests/test-ftello2.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec ${CHECKER} ./test-ftello${EXEEXT} 1 2 < "$srcdir/test-ftello2.sh"
diff --git a/src/gl/tests/test-ftello3.c b/src/gl/tests/test-ftello3.c
new file mode 100644
index 0000000..6b9b99d
--- /dev/null
+++ b/src/gl/tests/test-ftello3.c
@@ -0,0 +1,78 @@
+/* Test of ftello() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* None of the files accessed by this test are large, so disable the
+   fseek link warning if we are not using the gnulib fseek module.  */
+#define _GL_NO_LARGE_FILES
+#include <stdio.h>
+
+#include <string.h>
+
+#include "macros.h"
+
+#define TESTFILE "t-ftello3.tmp"
+
+int
+main (void)
+{
+  FILE *fp;
+
+  /* Create a file with some contents.  */
+  fp = fopen (TESTFILE, "w");
+  if (fp == NULL)
+    goto skip;
+  if (fwrite ("foogarsh", 1, 8, fp) < 8)
+    goto skip;
+  if (fclose (fp))
+    goto skip;
+
+  /* The file's contents is now "foogarsh".  */
+
+  /* Try writing after reading to EOF.  */
+  fp = fopen (TESTFILE, "r+");
+  if (fp == NULL)
+    goto skip;
+  if (fseek (fp, -1, SEEK_END))
+    goto skip;
+  ASSERT (getc (fp) == 'h');
+  ASSERT (getc (fp) == EOF);
+  ASSERT (ftello (fp) == 8);
+  ASSERT (ftello (fp) == 8);
+  ASSERT (putc ('!', fp) == '!');
+  ASSERT (ftello (fp) == 9);
+  ASSERT (fclose (fp) == 0);
+  fp = fopen (TESTFILE, "r");
+  if (fp == NULL)
+    goto skip;
+  {
+    char buf[10];
+    ASSERT (fread (buf, 1, 10, fp) == 9);
+    ASSERT (memcmp (buf, "foogarsh!", 9) == 0);
+  }
+  ASSERT (fclose (fp) == 0);
+
+  /* The file's contents is now "foogarsh!".  */
+
+  remove (TESTFILE);
+  return 0;
+
+ skip:
+  fprintf (stderr, "Skipping test: prerequisite file operations failed.\n");
+  remove (TESTFILE);
+  return 77;
+}
diff --git a/src/gl/tests/test-ftello4.c b/src/gl/tests/test-ftello4.c
new file mode 100644
index 0000000..5f4c14b
--- /dev/null
+++ b/src/gl/tests/test-ftello4.c
@@ -0,0 +1,70 @@
+/* Test of ftello() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = argv[1];
+
+  /* Test that ftello() sets errno if someone else closes the stream
+     fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "r");
+    ASSERT (fp != NULL);
+    setvbuf (fp, NULL, _IONBF, 0);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (ftello (fp) == (off_t)-1);
+    ASSERT (errno == EBADF);
+    fclose (fp);
+  }
+
+  /* Test that ftello() sets errno if the stream was constructed with
+     an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "w");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (ftello (fp) == (off_t)-1);
+        ASSERT (errno == EBADF);
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "w");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (ftello (fp) == (off_t)-1);
+        ASSERT (errno == EBADF);
+        fclose (fp);
+      }
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-ftello4.sh b/src/gl/tests/test-ftello4.sh
new file mode 100755
index 0000000..f7ff149
--- /dev/null
+++ b/src/gl/tests/test-ftello4.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+${CHECKER} ./test-ftello4${EXEEXT} "$srcdir/test-ftello4.sh" || exit 1
+
+exit 0
diff --git a/src/gl/tests/test-ftruncate.c b/src/gl/tests/test-ftruncate.c
new file mode 100644
index 0000000..d11b8eb
--- /dev/null
+++ b/src/gl/tests/test-ftruncate.c
@@ -0,0 +1,60 @@
+/* Test truncating a file.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (ftruncate, int, (int, off_t));
+
+#include <errno.h>
+#include <fcntl.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  const char *filename = argv[1];
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (ftruncate (-1, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (ftruncate (99, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  /* Test behaviour for read-only file descriptors.  */
+  {
+    int fd = open (filename, O_RDONLY);
+    ASSERT (fd >= 0);
+    errno = 0;
+    ASSERT (ftruncate (fd, 0) == -1);
+    ASSERT (errno == EBADF || errno == EINVAL
+            || errno == EACCES /* seen on mingw */
+           );
+    close (fd);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-ftruncate.sh b/src/gl/tests/test-ftruncate.sh
new file mode 100755
index 0000000..203e07b
--- /dev/null
+++ b/src/gl/tests/test-ftruncate.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec ${CHECKER} ./test-ftruncate${EXEEXT} "$srcdir/test-ftruncate.sh"
diff --git a/src/gl/tests/test-func.c b/src/gl/tests/test-func.c
new file mode 100644
index 0000000..d680759
--- /dev/null
+++ b/src/gl/tests/test-func.c
@@ -0,0 +1,40 @@
+/* Test whether __func__ is available
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "macros.h"
+
+int
+main ()
+{
+  ASSERT (strlen (__func__) > 0);
+
+  /* On SunPRO C 5.9, sizeof __func__ evaluates to 0.  The compiler warns:
+     "warning: null dimension: sizeof()".  */
+#if !defined __SUNPRO_C
+  ASSERT (strlen (__func__) + 1 == sizeof __func__);
+#endif
+
+  ASSERT (strcmp (__func__, "main") == 0
+          || strcmp (__func__, "<unknown function>") == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-fwrite.c b/src/gl/tests/test-fwrite.c
new file mode 100644
index 0000000..17e80bd
--- /dev/null
+++ b/src/gl/tests/test-fwrite.c
@@ -0,0 +1,96 @@
+/* Test of fwrite() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (fwrite, size_t, (const void *, size_t, size_t, FILE *));
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+#endif
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  const char *filename = "test-fwrite.txt";
+
+  /* We don't have an fwrite() function that installs an invalid parameter
+     handler so far.  So install that handler here, explicitly.  */
+#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
+    && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
+  gl_msvc_inval_ensure_handler ();
+#endif
+
+  /* Test that fwrite() on an unbuffered stream sets errno if someone else
+     closes the stream fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "w");
+    char buf[5] = "world";
+    ASSERT (fp != NULL);
+    setvbuf (fp, NULL, _IONBF, 0);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
+    ASSERT (errno == EBADF);
+    ASSERT (ferror (fp));
+    fclose (fp);
+  }
+
+  /* Test that fwrite() on an unbuffered stream sets errno if the stream
+     was constructed with an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "w");
+    if (fp != NULL)
+      {
+        char buf[5] = "world";
+        setvbuf (fp, NULL, _IONBF, 0);
+        errno = 0;
+        ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "w");
+    if (fp != NULL)
+      {
+        char buf[5] = "world";
+        setvbuf (fp, NULL, _IONBF, 0);
+        errno = 0;
+        ASSERT (fwrite (buf, 1, sizeof (buf), fp) == 0);
+        ASSERT (errno == EBADF);
+        ASSERT (ferror (fp));
+        fclose (fp);
+      }
+  }
+
+  /* Clean up.  */
+  unlink (filename);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-getaddrinfo.c b/src/gl/tests/test-getaddrinfo.c
new file mode 100644
index 0000000..ad244d5
--- /dev/null
+++ b/src/gl/tests/test-getaddrinfo.c
@@ -0,0 +1,178 @@
+/* Test the getaddrinfo module.
+
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson.  */
+
+#include <config.h>
+
+#include <netdb.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (gai_strerror, char const *, (int));
+/* On native Windows, these two functions may have the __stdcall calling
+   convention.  But the SIGNATURE_CHECK works only for functions with __cdecl
+   calling convention.  */
+#if !(defined _WIN32 && !defined __CYGWIN__)
+SIGNATURE_CHECK (freeaddrinfo, void, (struct addrinfo *));
+SIGNATURE_CHECK (getaddrinfo, int, (char const *, char const *,
+                                    struct addrinfo const *,
+                                    struct addrinfo **));
+#endif
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "sockets.h"
+
+/* Whether to print debugging messages.  */
+#define ENABLE_DEBUGGING 0
+
+#if ENABLE_DEBUGGING
+# define dbgprintf printf
+#else
+# define dbgprintf if (0) printf
+#endif
+
+/* BeOS does not have AF_UNSPEC.  */
+#ifndef AF_UNSPEC
+# define AF_UNSPEC 0
+#endif
+
+#ifndef EAI_SERVICE
+# define EAI_SERVICE 0
+#endif
+
+static int
+simple (char const *host, char const *service)
+{
+  char buf[BUFSIZ];
+  static int skip = 0;
+  struct addrinfo hints;
+  struct addrinfo *ai0, *ai;
+  int res;
+  int err;
+
+  /* Once we skipped the test, do not try anything else */
+  if (skip)
+    return 0;
+
+  dbgprintf ("Finding %s service %s...\n", host, service);
+
+  /* This initializes "hints" but does not use it.  Is there a reason
+     for this?  If so, please fix this comment.  */
+  memset (&hints, 0, sizeof (hints));
+  hints.ai_flags = AI_CANONNAME;
+  hints.ai_family = AF_UNSPEC;
+  hints.ai_socktype = SOCK_STREAM;
+
+  res = getaddrinfo (host, service, 0, &ai0);
+  err = errno;
+
+  dbgprintf ("res %d: %s\n", res, gai_strerror (res));
+
+  if (res != 0)
+    {
+      /* EAI_AGAIN is returned if no network is available. Don't fail
+         the test merely because someone is down the country on their
+         in-law's farm. */
+      if (res == EAI_AGAIN)
+        {
+          skip++;
+          fprintf (stderr, "skipping getaddrinfo test: no network?\n");
+          return 77;
+        }
+      /* IRIX reports EAI_NONAME for "https".  Don't fail the test
+         merely because of this.  */
+      if (res == EAI_NONAME)
+        return 0;
+      /* Solaris reports EAI_SERVICE for "http" and "https".  Don't
+         fail the test merely because of this.  */
+      if (res == EAI_SERVICE)
+        return 0;
+#ifdef EAI_NODATA
+      /* AIX reports EAI_NODATA for "https".  Don't fail the test
+         merely because of this.  */
+      if (res == EAI_NODATA)
+        return 0;
+#endif
+      /* Provide details if errno was set.  */
+      if (res == EAI_SYSTEM)
+        fprintf (stderr, "system error: %s\n", strerror (err));
+
+      return 1;
+    }
+
+  for (ai = ai0; ai; ai = ai->ai_next)
+    {
+      void *ai_addr = ai->ai_addr;
+      struct sockaddr_in *sock_addr = ai_addr;
+      dbgprintf ("\tflags %x\n", ai->ai_flags + 0u);
+      dbgprintf ("\tfamily %x\n", ai->ai_family + 0u);
+      dbgprintf ("\tsocktype %x\n", ai->ai_socktype + 0u);
+      dbgprintf ("\tprotocol %x\n", ai->ai_protocol + 0u);
+      dbgprintf ("\taddrlen %lu: ", (unsigned long) ai->ai_addrlen);
+      dbgprintf ("\tFound %s\n",
+                 inet_ntop (ai->ai_family,
+                            &sock_addr->sin_addr,
+                            buf, sizeof (buf) - 1));
+      if (ai->ai_canonname)
+        dbgprintf ("\tFound %s...\n", ai->ai_canonname);
+
+      {
+        char ipbuf[BUFSIZ];
+        char portbuf[BUFSIZ];
+
+        res = getnameinfo (ai->ai_addr, ai->ai_addrlen,
+                           ipbuf, sizeof (ipbuf) - 1,
+                           portbuf, sizeof (portbuf) - 1,
+                           NI_NUMERICHOST|NI_NUMERICSERV);
+        dbgprintf ("\t\tgetnameinfo %d: %s\n", res, gai_strerror (res));
+        if (res == 0)
+          {
+            dbgprintf ("\t\tip %s\n", ipbuf);
+            dbgprintf ("\t\tport %s\n", portbuf);
+          }
+      }
+
+    }
+
+  freeaddrinfo (ai0);
+
+  return 0;
+}
+
+#define HOST1 "www.gnu.org"
+#define SERV1 "http"
+#define HOST2 "www.ibm.com"
+#define SERV2 "https"
+#define HOST3 "microsoft.com"
+#define SERV3 "http"
+#define HOST4 "google.org"
+#define SERV4 "ldap"
+
+int main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  return simple (HOST1, SERV1)
+    + simple (HOST2, SERV2)
+    + simple (HOST3, SERV3)
+    + simple (HOST4, SERV4);
+}
diff --git a/src/gl/tests/test-getcwd-lgpl.c b/src/gl/tests/test-getcwd-lgpl.c
new file mode 100644
index 0000000..17080d9
--- /dev/null
+++ b/src/gl/tests/test-getcwd-lgpl.c
@@ -0,0 +1,102 @@
+/* Test of getcwd() function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (getcwd, char *, (char *, size_t));
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  char *pwd1;
+  char *pwd2;
+  /* If the user provides an argument, attempt to chdir there first.  */
+  if (1 < argc)
+    {
+      if (chdir (argv[1]) == 0)
+        printf ("changed to directory %s\n", argv[1]);
+    }
+
+  pwd1 = getcwd (NULL, 0);
+  ASSERT (pwd1 && *pwd1);
+  if (1 < argc)
+    printf ("cwd=%s\n", pwd1);
+
+  /* Make sure the result is usable.  */
+  ASSERT (chdir (pwd1) == 0);
+  ASSERT (chdir (".//./.") == 0);
+
+  /* Make sure that result is normalized.  */
+  pwd2 = getcwd (NULL, 0);
+  ASSERT (pwd2);
+  ASSERT (strcmp (pwd1, pwd2) == 0);
+  free (pwd2);
+  {
+    size_t len = strlen (pwd1);
+    ssize_t i = len - 10;
+    if (i < 1)
+      i = 1;
+    pwd2 = getcwd (NULL, len + 1);
+    ASSERT (pwd2);
+    free (pwd2);
+    pwd2 = malloc (len + 2);
+    for ( ; i <= len; i++)
+      {
+        char *tmp;
+        errno = 0;
+        ASSERT (getcwd (pwd2, i) == NULL);
+        ASSERT (errno == ERANGE);
+        /* Allow either glibc or BSD behavior, since POSIX allows both.  */
+        errno = 0;
+        tmp = getcwd (NULL, i);
+        if (tmp)
+          {
+            ASSERT (strcmp (pwd1, tmp) == 0);
+            free (tmp);
+          }
+        else
+          {
+            ASSERT (errno == ERANGE);
+          }
+      }
+    ASSERT (getcwd (pwd2, len + 1) == pwd2);
+    pwd2[len] = '/';
+    pwd2[len + 1] = '\0';
+  }
+  ASSERT (strstr (pwd2, "/./") == NULL);
+  ASSERT (strstr (pwd2, "/../") == NULL);
+  ASSERT (strstr (pwd2 + 1 + (pwd2[1] == '/'), "//") == NULL);
+
+  /* Validate a POSIX requirement on size.  */
+  errno = 0;
+  ASSERT (getcwd(pwd2, 0) == NULL);
+  ASSERT (errno == EINVAL);
+
+  free (pwd1);
+  free (pwd2);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-getdelim.c b/src/gl/tests/test-getdelim.c
new file mode 100644
index 0000000..c88629b
--- /dev/null
+++ b/src/gl/tests/test-getdelim.c
@@ -0,0 +1,94 @@
+/* Test of getdelim() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (getdelim, ssize_t, (char **, size_t *, int, FILE *));
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  FILE *f;
+  char *line;
+  size_t len;
+  ssize_t result;
+
+  /* Create test file.  */
+  f = fopen ("test-getdelim.txt", "wb");
+  if (!f || fwrite ("anAnbcnd\0f", 1, 10, f) != 10 || fclose (f) != 0)
+    {
+      fputs ("Failed to create sample file.\n", stderr);
+      remove ("test-getdelim.txt");
+      return 1;
+    }
+  f = fopen ("test-getdelim.txt", "rb");
+  if (!f)
+    {
+      fputs ("Failed to reopen sample file.\n", stderr);
+      remove ("test-getdelim.txt");
+      return 1;
+    }
+
+  /* Test initial allocation, which must include trailing NUL.  */
+  line = NULL;
+  len = 0;
+  result = getdelim (&line, &len, 'n', f);
+  ASSERT (result == 2);
+  ASSERT (strcmp (line, "an") == 0);
+  ASSERT (2 < len);
+  free (line);
+
+  /* Test initial allocation again, with line = NULL and len != 0.  */
+  line = NULL;
+  len = (size_t)(~0) / 4;
+  result = getdelim (&line, &len, 'n', f);
+  ASSERT (result == 2);
+  ASSERT (strcmp (line, "An") == 0);
+  ASSERT (2 < len);
+  free (line);
+
+  /* Test growth of buffer.  */
+  line = malloc (1);
+  len = 1;
+  result = getdelim (&line, &len, 'n', f);
+  ASSERT (result == 3);
+  ASSERT (strcmp (line, "bcn") == 0);
+  ASSERT (3 < len);
+
+  /* Test embedded NULs and EOF behavior.  */
+  result = getdelim (&line, &len, 'n', f);
+  ASSERT (result == 3);
+  ASSERT (memcmp (line, "d\0f", 4) == 0);
+  ASSERT (3 < len);
+
+  result = getdelim (&line, &len, 'n', f);
+  ASSERT (result == -1);
+
+  free (line);
+  fclose (f);
+  remove ("test-getdelim.txt");
+  return 0;
+}
diff --git a/src/gl/tests/test-getdtablesize.c b/src/gl/tests/test-getdtablesize.c
new file mode 100644
index 0000000..d56c682
--- /dev/null
+++ b/src/gl/tests/test-getdtablesize.c
@@ -0,0 +1,36 @@
+/* Test of getdtablesize() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (getdtablesize, int, (void));
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  ASSERT (getdtablesize () >= 3);
+  ASSERT (dup2 (0, getdtablesize() - 1) == getdtablesize () - 1);
+  ASSERT (dup2 (0, getdtablesize()) == -1);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-getline.c b/src/gl/tests/test-getline.c
new file mode 100644
index 0000000..dadac36
--- /dev/null
+++ b/src/gl/tests/test-getline.c
@@ -0,0 +1,94 @@
+/* Test of getline() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (getline, ssize_t, (char **, size_t *, FILE *));
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  FILE *f;
+  char *line;
+  size_t len;
+  ssize_t result;
+
+  /* Create test file.  */
+  f = fopen ("test-getline.txt", "wb");
+  if (!f || fwrite ("a\nA\nbc\nd\0f", 1, 10, f) != 10 || fclose (f) != 0)
+    {
+      fputs ("Failed to create sample file.\n", stderr);
+      remove ("test-getline.txt");
+      return 1;
+    }
+  f = fopen ("test-getline.txt", "rb");
+  if (!f)
+    {
+      fputs ("Failed to reopen sample file.\n", stderr);
+      remove ("test-getline.txt");
+      return 1;
+    }
+
+  /* Test initial allocation, which must include trailing NUL.  */
+  line = NULL;
+  len = 0;
+  result = getline (&line, &len, f);
+  ASSERT (result == 2);
+  ASSERT (strcmp (line, "a\n") == 0);
+  ASSERT (2 < len);
+  free (line);
+
+  /* Test initial allocation again, with line = NULL and len != 0.  */
+  line = NULL;
+  len = (size_t)(~0) / 4;
+  result = getline (&line, &len, f);
+  ASSERT (result == 2);
+  ASSERT (strcmp (line, "A\n") == 0);
+  ASSERT (2 < len);
+  free (line);
+
+  /* Test growth of buffer, must not leak.  */
+  len = 1;
+  line = malloc (len);
+  result = getline (&line, &len, f);
+  ASSERT (result == 3);
+  ASSERT (strcmp (line, "bc\n") == 0);
+  ASSERT (3 < len);
+
+  /* Test embedded NULs and EOF behavior.  */
+  result = getline (&line, &len, f);
+  ASSERT (result == 3);
+  ASSERT (memcmp (line, "d\0f", 4) == 0);
+  ASSERT (3 < len);
+
+  result = getline (&line, &len, f);
+  ASSERT (result == -1);
+
+  free (line);
+  fclose (f);
+  remove ("test-getline.txt");
+  return 0;
+}
diff --git a/src/gl/tests/test-getpeername.c b/src/gl/tests/test-getpeername.c
new file mode 100644
index 0000000..9fe8180
--- /dev/null
+++ b/src/gl/tests/test-getpeername.c
@@ -0,0 +1,56 @@
+/* Test getpeername() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (getpeername, int, (int, struct sockaddr *, socklen_t *));
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct sockaddr_in addr;
+    socklen_t addrlen = sizeof (addr);
+
+    errno = 0;
+    ASSERT (getpeername (-1, (struct sockaddr *) &addr, &addrlen) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    struct sockaddr_in addr;
+    socklen_t addrlen = sizeof (addr);
+
+    close (99);
+    errno = 0;
+    ASSERT (getpeername (99, (struct sockaddr *) &addr, &addrlen) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-getprogname.c b/src/gl/tests/test-getprogname.c
new file mode 100644
index 0000000..21eb338
--- /dev/null
+++ b/src/gl/tests/test-getprogname.c
@@ -0,0 +1,58 @@
+/* Test the gnulib getprogname module.
+   Copyright (C) 2016-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "getprogname.h"
+#include <string.h>
+#include <assert.h>
+
+#ifdef __hpux
+# define STREQ(a, b) (strncmp (a, b, 14) == 0)
+#else
+# define STREQ(a, b) (strcmp (a, b) == 0)
+#endif
+
+int
+main (void)
+{
+  char const *p = getprogname ();
+
+  /* libtool creates a temporary executable whose name is sometimes prefixed
+     with "lt-" (depends on the platform).  But the name of the temporary
+     executable is a detail that should not be visible to the end user and to
+     the test suite.  Remove this "lt-" prefix here.  */
+  if (strncmp (p, "lt-", 3) == 0)
+    p += 3;
+
+  /* Note: You can make this test fail
+     a) by running it on a case-insensitive file system (such as on Windows,
+        Cygwin, or on Mac OS X with a case-insensitive HFS+ file system),
+        with an invocation that contains upper case characters, e.g.
+        test-GETPROGNAME,
+     b) by hardlinking or symlinking it to a different name (e.g. test-foo)
+        and invoking it through that name.
+     That's not the intended use. The Makefile always invokes it as
+     'test-getprogname${EXEEXT}'. */
+#if defined __CYGWIN__
+  /* The Cygwin getprogname() function strips the ".exe" suffix. */
+  assert (STREQ (p, "test-getprogname"));
+#else
+  assert (STREQ (p, "test-getprogname" EXEEXT));
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-gettimeofday.c b/src/gl/tests/test-gettimeofday.c
new file mode 100644
index 0000000..f9139d0
--- /dev/null
+++ b/src/gl/tests/test-gettimeofday.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+ * Written by Jim Meyering.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/time.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (gettimeofday, int,
+                 (struct timeval *, GETTIMEOFDAY_TIMEZONE *));
+
+#include <time.h>
+
+#include <stdio.h>
+#include <string.h>
+
+int
+main (void)
+{
+  time_t t = 0;
+  struct tm *lt;
+  struct tm saved_lt;
+  struct timeval tv;
+  lt = localtime (&t);
+  saved_lt = *lt;
+  gettimeofday (&tv, NULL);
+  if (memcmp (lt, &saved_lt, sizeof (struct tm)) != 0)
+    {
+      fprintf (stderr, "gettimeofday still clobbers the localtime buffer!\n");
+      return 1;
+    }
+  return 0;
+}
diff --git a/src/gl/tests/test-hash.c b/src/gl/tests/test-hash.c
new file mode 100644
index 0000000..4e8c59f
--- /dev/null
+++ b/src/gl/tests/test-hash.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright (C) 2009-2021 Free Software Foundation, Inc.
+ * Written by Jim Meyering
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "hash.h"
+#include "hash-pjw.h"
+#include "inttostr.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define STREQ(a, b) (strcmp (a, b) == 0)
+#define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
+
+static bool
+hash_compare_strings (void const *x, void const *y)
+{
+  ASSERT (x != y);
+  return STREQ (x, y) ? true : false;
+}
+
+static void
+hash_freer (void *x)
+{
+  free (x);
+}
+
+static void
+insert_new (Hash_table *ht, const void *ent)
+{
+  void *e = hash_insert (ht, ent);
+  ASSERT (e == ent);
+}
+
+static bool
+walk (void *ent, void *data)
+{
+  char *str = ent;
+  unsigned int *map = data;
+  switch (*str)
+    {
+    case 'a': *map |= 1; return true;
+    case 'b': *map |= 2; return true;
+    case 'c': *map |= 4; return true;
+    }
+  *map |= 8;
+  return false;
+}
+
+static int
+get_seed (char const *str, unsigned int *seed)
+{
+  size_t len = strlen (str);
+  if (len == 0 || strspn (str, "0123456789") != len || 10 < len)
+    return 1;
+
+  *seed = atoi (str);
+  return 0;
+}
+
+int
+main (int argc, char **argv)
+{
+  unsigned int i;
+  unsigned int k;
+  unsigned int table_size[] = {1, 2, 3, 4, 5, 23, 53};
+  Hash_table *ht;
+  Hash_tuning tuning;
+
+  hash_reset_tuning (&tuning);
+  tuning.shrink_threshold = 0.3;
+  tuning.shrink_factor = 0.707;
+  tuning.growth_threshold = 1.5;
+  tuning.growth_factor = 2.0;
+  tuning.is_n_buckets = true;
+
+  if (1 < argc)
+    {
+      unsigned int seed;
+      if (get_seed (argv[1], &seed) != 0)
+        {
+          fprintf (stderr, "invalid seed: %s\n", argv[1]);
+          exit (EXIT_FAILURE);
+        }
+
+      srand (seed);
+    }
+
+  for (i = 0; i < ARRAY_CARDINALITY (table_size); i++)
+    {
+      size_t sz = table_size[i];
+      ht = hash_initialize (sz, NULL, hash_pjw, hash_compare_strings, NULL);
+      ASSERT (ht);
+      insert_new (ht, "a");
+      {
+        char *str1 = strdup ("a");
+        char *str2;
+        ASSERT (str1);
+        str2 = hash_insert (ht, str1);
+        ASSERT (str1 != str2);
+        ASSERT (STREQ (str1, str2));
+        free (str1);
+      }
+      insert_new (ht, "b");
+      insert_new (ht, "c");
+      i = 0;
+      ASSERT (hash_do_for_each (ht, walk, &i) == 3);
+      ASSERT (i == 7);
+      {
+        void *buf[5] = { NULL };
+        ASSERT (hash_get_entries (ht, NULL, 0) == 0);
+        ASSERT (hash_get_entries (ht, buf, 5) == 3);
+        ASSERT (STREQ (buf[0], "a") || STREQ (buf[0], "b") || STREQ (buf[0], "c"));
+      }
+      ASSERT (hash_remove (ht, "a"));
+      ASSERT (hash_remove (ht, "a") == NULL);
+      ASSERT (hash_remove (ht, "b"));
+      ASSERT (hash_remove (ht, "c"));
+
+      ASSERT (hash_rehash (ht, 47));
+      ASSERT (hash_rehash (ht, 467));
+
+      /* Free an empty table. */
+      hash_clear (ht);
+      hash_free (ht);
+
+      ht = hash_initialize (sz, NULL, hash_pjw, hash_compare_strings, NULL);
+      ASSERT (ht);
+
+      insert_new (ht, "z");
+      insert_new (ht, "y");
+      insert_new (ht, "x");
+      insert_new (ht, "w");
+      insert_new (ht, "v");
+      insert_new (ht, "u");
+
+      hash_clear (ht);
+      ASSERT (hash_get_n_entries (ht) == 0);
+      hash_free (ht);
+
+      /* Test pointer hashing.  */
+      ht = hash_initialize (sz, NULL, NULL, NULL, NULL);
+      ASSERT (ht);
+      {
+        char *str = strdup ("a");
+        ASSERT (str);
+        insert_new (ht, "a");
+        insert_new (ht, str);
+        ASSERT (hash_lookup (ht, str) == str);
+        free (str);
+      }
+      hash_free (ht);
+    }
+
+  hash_reset_tuning (&tuning);
+  tuning.shrink_threshold = 0.3;
+  tuning.shrink_factor = 0.707;
+  tuning.growth_threshold = 1.5;
+  tuning.growth_factor = 2.0;
+  tuning.is_n_buckets = true;
+  /* Invalid tuning.  */
+  ht = hash_initialize (4651, &tuning, hash_pjw, hash_compare_strings,
+                        hash_freer);
+  ASSERT (!ht);
+
+  /* Alternate tuning.  */
+  tuning.growth_threshold = 0.89;
+
+  /* Run with default tuning, then with custom tuning settings.  */
+  for (k = 0; k < 2; k++)
+    {
+      Hash_tuning const *tune = (k == 0 ? NULL : &tuning);
+      /* Now, each entry is malloc'd.  */
+      ht = hash_initialize (4651, tune, hash_pjw,
+                            hash_compare_strings, hash_freer);
+      ASSERT (ht);
+      for (i = 0; i < 10000; i++)
+        {
+          unsigned int op = rand () % 10;
+          switch (op)
+            {
+            case 0:
+            case 1:
+            case 2:
+            case 3:
+            case 4:
+            case 5:
+              {
+                char buf[50];
+                char const *p = uinttostr (i, buf);
+                char *p_dup = strdup (p);
+                ASSERT (p_dup);
+                insert_new (ht, p_dup);
+              }
+              break;
+
+            case 6:
+              {
+                size_t n = hash_get_n_entries (ht);
+                ASSERT (hash_rehash (ht, n + rand () % 20));
+              }
+              break;
+
+            case 7:
+              {
+                size_t n = hash_get_n_entries (ht);
+                size_t delta = rand () % 20;
+                if (delta < n)
+                  ASSERT (hash_rehash (ht, n - delta));
+              }
+              break;
+
+            case 8:
+            case 9:
+              {
+                /* Delete a random entry.  */
+                size_t n = hash_get_n_entries (ht);
+                if (n)
+                  {
+                    size_t kk = rand () % n;
+                    void const *p;
+                    void *v;
+                    for (p = hash_get_first (ht); kk;
+                         --kk, p = hash_get_next (ht, p))
+                      {
+                        /* empty */
+                      }
+                    ASSERT (p);
+                    v = hash_remove (ht, p);
+                    ASSERT (v);
+                    free (v);
+                  }
+                break;
+              }
+            }
+          ASSERT (hash_table_ok (ht));
+        }
+
+      hash_free (ht);
+    }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-ignore-value.c b/src/gl/tests/test-ignore-value.c
new file mode 100644
index 0000000..3b8d0a6
--- /dev/null
+++ b/src/gl/tests/test-ignore-value.c
@@ -0,0 +1,78 @@
+/* Test the "ignore-value" module.
+
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake.  */
+
+#include <config.h>
+
+#include "ignore-value.h"
+
+#include <stdio.h>
+
+#include "attribute.h"
+
+struct s { int i; };
+static char doChar (void) NODISCARD;
+static int doInt (void) NODISCARD;
+static off_t doOff (void) NODISCARD;
+static void *doPtr (void) NODISCARD;
+static struct s doStruct (void) NODISCARD;
+
+static char
+doChar (void)
+{
+  return 0;
+}
+
+static int
+doInt (void)
+{
+  return 0;
+}
+
+static off_t
+doOff (void)
+{
+  return 0;
+}
+
+static void *
+doPtr (void)
+{
+  return NULL;
+}
+
+static struct s
+doStruct (void)
+{
+  static struct s s1;
+  return s1;
+}
+
+int
+main (void)
+{
+  /* If this test can compile with -Werror and the same warnings as
+     the rest of the project, then we are properly silencing warnings
+     about ignored return values.  */
+  ignore_value (doChar ());
+  ignore_value (doInt ());
+  ignore_value (doOff ());
+  ignore_value (doPtr ());
+  ignore_value (doStruct ());
+  return 0;
+}
diff --git a/src/gl/tests/test-inet_ntop.c b/src/gl/tests/test-inet_ntop.c
new file mode 100644
index 0000000..c21a3f7
--- /dev/null
+++ b/src/gl/tests/test-inet_ntop.c
@@ -0,0 +1,56 @@
+/* Test of inet_ntop function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <arpa/inet.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (inet_ntop, char const *, (int, void const *, char *,
+                                           socklen_t));
+
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+#if defined AF_INET /* HAVE_IPV4 */
+  {
+    struct in_addr internal;
+    char printable[16];
+    const char *result;
+
+    /* This machine was for a long time known as
+       ma2s2.mathematik.uni-karlsruhe.de.  */
+# ifdef WORDS_BIGENDIAN
+    internal.s_addr = 0x810D7302;
+# else
+    internal.s_addr = 0x02730D81;
+# endif
+    result = inet_ntop (AF_INET, &internal, printable, sizeof (printable));
+    ASSERT (result != NULL);
+    ASSERT (strcmp (result, "129.13.115.2") == 0);
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-inet_pton.c b/src/gl/tests/test-inet_pton.c
new file mode 100644
index 0000000..9d2e50f
--- /dev/null
+++ b/src/gl/tests/test-inet_pton.c
@@ -0,0 +1,58 @@
+/* Test of inet_pton function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <arpa/inet.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (inet_pton, int, (int, const char *, void *));
+
+#include <netinet/in.h>
+#include <sys/socket.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+#if defined AF_INET /* HAVE_IPV4 */
+  {
+    /* This machine was for a long time known as
+       ma2s2.mathematik.uni-karlsruhe.de.  */
+    const char printable[] = "129.13.115.2";
+    struct in_addr internal;
+    int ret;
+
+    ret = inet_pton (AF_INET, printable, &internal);
+    ASSERT (ret == 1);
+    /* Verify that internal is filled in network byte order.  */
+    ASSERT (((unsigned char *) &internal)[0] == 0x81);
+    ASSERT (((unsigned char *) &internal)[1] == 0x0D);
+    ASSERT (((unsigned char *) &internal)[2] == 0x73);
+    ASSERT (((unsigned char *) &internal)[3] == 0x02);
+# ifdef WORDS_BIGENDIAN
+    ASSERT (internal.s_addr == 0x810D7302);
+# else
+    ASSERT (internal.s_addr == 0x02730D81);
+# endif
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-init.sh b/src/gl/tests/test-init.sh
new file mode 100755
index 0000000..7b8c451
--- /dev/null
+++ b/src/gl/tests/test-init.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+# Unit tests for init.sh
+# Copyright (C) 2011-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+: ${srcdir=.}
+. "$srcdir/init.sh"; path_prepend_ .
+
+fail=0
+
+test_compare()
+{
+  touch empty || fail=1
+  echo xyz > in || fail=1
+
+  compare /dev/null /dev/null >out 2>err || fail=1
+  test -s out && fail_ "out not empty: $(cat out)"
+  # "err" should be empty, too, but has "set -x" output when VERBOSE=yes
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+
+  compare /dev/null empty >out 2>err || fail=1
+  test -s out && fail_ "out not empty: $(cat out)"
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+
+  compare in in >out 2>err || fail=1
+  test -s out && fail_ "out not empty: $(cat out)"
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+
+  compare /dev/null in >out 2>err && fail=1
+  cat <<\EOF > exp
+diff -u /dev/null in
+--- /dev/null	1970-01-01
++++ in	1970-01-01
++xyz
+EOF
+  compare exp out || fail=1
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+
+  compare empty in >out 2>err && fail=1
+  # Compare against expected output only if compare is using diff -u.
+  if grep @ out >/dev/null; then
+    # Remove the TAB-date suffix on each --- and +++ line,
+    # for both the expected and the actual output files.
+    # Also remove the @@ line, since Solaris 5.10 and GNU diff formats differ:
+    # -@@ -0,0 +1 @@
+    # +@@ -1,0 +1,1 @@
+    # Also, remove space after leading '+', since AIX 7.1 diff outputs a space.
+    sed 's/	.*//;/^@@/d;s/^+ /+/' out > k && mv k out
+    cat <<\EOF > exp
+--- empty
++++ in
++xyz
+EOF
+    compare exp out || fail=1
+  fi
+  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac
+}
+
+test_compare
+
+Exit $fail
diff --git a/src/gl/tests/test-intprops.c b/src/gl/tests/test-intprops.c
new file mode 100644
index 0000000..fff4218
--- /dev/null
+++ b/src/gl/tests/test-intprops.c
@@ -0,0 +1,441 @@
+/* Test intprops.h.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+/* Tell gcc not to warn about the long expressions that the overflow
+   macros expand to, or about the (X < 0) expressions.  */
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Woverlength-strings"
+# pragma GCC diagnostic ignored "-Wtype-limits"
+
+/* Work around a bug in GCC 6.1 and earlier; see:
+   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68971  */
+# pragma GCC diagnostic ignored "-Woverflow"
+
+#endif
+
+#include <config.h>
+
+#include "intprops.h"
+#include "verify.h"
+
+#include <stdbool.h>
+#include <inttypes.h>
+#include <limits.h>
+
+#include "macros.h"
+
+/* Compile-time verification of expression X.
+   In this file, we need it as a statement, rather than as a declaration.  */
+#define verify_stmt(x) do { verify (x); } while (0)
+
+/* VERIFY (X) uses a static assertion for compilers that are known to work,
+   and falls back on a dynamic assertion for other compilers.
+   These tests should be checkable via 'verify' rather than 'ASSERT', but
+   using 'verify' would run into a bug with HP-UX 11.23 cc; see
+   <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00401.html>.  */
+#if __GNUC__ || __clang__ || __SUNPRO_C
+# define VERIFY(x) verify_stmt (x)
+#else
+# define VERIFY(x) ASSERT (x)
+#endif
+
+#define DONTCARE __LINE__
+
+int int_minus_2 = -2;
+int int_1 = 1;
+
+int
+main (void)
+{
+  /* Use VERIFY for tests that must be integer constant expressions,
+     ASSERT otherwise.  */
+
+  /* TYPE_IS_INTEGER.  */
+  ASSERT (TYPE_IS_INTEGER (bool));
+  ASSERT (TYPE_IS_INTEGER (char));
+  ASSERT (TYPE_IS_INTEGER (signed char));
+  ASSERT (TYPE_IS_INTEGER (unsigned char));
+  ASSERT (TYPE_IS_INTEGER (short int));
+  ASSERT (TYPE_IS_INTEGER (unsigned short int));
+  ASSERT (TYPE_IS_INTEGER (int));
+  ASSERT (TYPE_IS_INTEGER (unsigned int));
+  ASSERT (TYPE_IS_INTEGER (long int));
+  ASSERT (TYPE_IS_INTEGER (unsigned long int));
+  ASSERT (TYPE_IS_INTEGER (intmax_t));
+  ASSERT (TYPE_IS_INTEGER (uintmax_t));
+  ASSERT (! TYPE_IS_INTEGER (float));
+  ASSERT (! TYPE_IS_INTEGER (double));
+  ASSERT (! TYPE_IS_INTEGER (long double));
+
+  /* TYPE_SIGNED.  */
+  /* VERIFY (! TYPE_SIGNED (bool)); // not guaranteed by gnulib substitute */
+  VERIFY (TYPE_SIGNED (signed char));
+  VERIFY (! TYPE_SIGNED (unsigned char));
+  VERIFY (TYPE_SIGNED (short int));
+  VERIFY (! TYPE_SIGNED (unsigned short int));
+  VERIFY (TYPE_SIGNED (int));
+  VERIFY (! TYPE_SIGNED (unsigned int));
+  VERIFY (TYPE_SIGNED (long int));
+  VERIFY (! TYPE_SIGNED (unsigned long int));
+  VERIFY (TYPE_SIGNED (intmax_t));
+  VERIFY (! TYPE_SIGNED (uintmax_t));
+  ASSERT (TYPE_SIGNED (float));
+  ASSERT (TYPE_SIGNED (double));
+  ASSERT (TYPE_SIGNED (long double));
+
+  /* Integer representation.  Check that it is two's complement.  */
+  VERIFY (INT_MIN + INT_MAX < 0);
+
+  /* TYPE_MINIMUM, TYPE_MAXIMUM.  */
+  VERIFY (TYPE_MINIMUM (char) == CHAR_MIN);
+  VERIFY (TYPE_MAXIMUM (char) == CHAR_MAX);
+  VERIFY (TYPE_MINIMUM (unsigned char) == 0);
+  VERIFY (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
+  VERIFY (TYPE_MINIMUM (signed char) == SCHAR_MIN);
+  VERIFY (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
+  VERIFY (TYPE_MINIMUM (short int) == SHRT_MIN);
+  VERIFY (TYPE_MAXIMUM (short int) == SHRT_MAX);
+  VERIFY (TYPE_MINIMUM (unsigned short int) == 0);
+  VERIFY (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
+  VERIFY (TYPE_MINIMUM (int) == INT_MIN);
+  VERIFY (TYPE_MAXIMUM (int) == INT_MAX);
+  VERIFY (TYPE_MINIMUM (unsigned int) == 0);
+  VERIFY (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
+  VERIFY (TYPE_MINIMUM (long int) == LONG_MIN);
+  VERIFY (TYPE_MAXIMUM (long int) == LONG_MAX);
+  VERIFY (TYPE_MINIMUM (unsigned long int) == 0);
+  VERIFY (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
+  #ifdef LLONG_MAX
+   verify_stmt (TYPE_MINIMUM (long long int) == LLONG_MIN);
+   verify_stmt (TYPE_MAXIMUM (long long int) == LLONG_MAX);
+   verify_stmt (TYPE_MINIMUM (unsigned long long int) == 0);
+   verify_stmt (TYPE_MAXIMUM (unsigned long long int) == ULLONG_MAX);
+  #endif
+  VERIFY (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
+  VERIFY (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
+  VERIFY (TYPE_MINIMUM (uintmax_t) == 0);
+  VERIFY (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
+
+  /* TYPE_WIDTH.  */
+  #ifdef CHAR_WIDTH
+   verify_stmt (TYPE_WIDTH (char) == CHAR_WIDTH);
+   verify_stmt (TYPE_WIDTH (signed char) == SCHAR_WIDTH);
+   verify_stmt (TYPE_WIDTH (unsigned char) == UCHAR_WIDTH);
+   verify_stmt (TYPE_WIDTH (short int) == SHRT_WIDTH);
+   verify_stmt (TYPE_WIDTH (unsigned short int) == USHRT_WIDTH);
+   verify_stmt (TYPE_WIDTH (int) == INT_WIDTH);
+   verify_stmt (TYPE_WIDTH (unsigned int) == UINT_WIDTH);
+   verify_stmt (TYPE_WIDTH (long int) == LONG_WIDTH);
+   verify_stmt (TYPE_WIDTH (unsigned long int) == ULONG_WIDTH);
+   #ifdef LLONG_WIDTH
+    verify_stmt (TYPE_WIDTH (long long int) == LLONG_WIDTH);
+    verify_stmt (TYPE_WIDTH (unsigned long long int) == ULLONG_WIDTH);
+   #endif
+  #endif
+
+  /* INT_BITS_STRLEN_BOUND.  */
+  VERIFY (INT_BITS_STRLEN_BOUND (1) == 1);
+  VERIFY (INT_BITS_STRLEN_BOUND (2620) == 789);
+
+  /* INT_STRLEN_BOUND, INT_BUFSIZE_BOUND.  */
+  #ifdef INT32_MAX /* POSIX guarantees int32_t; this ports to non-POSIX.  */
+  VERIFY (INT_STRLEN_BOUND (int32_t) == sizeof ("-2147483648") - 1);
+  VERIFY (INT_BUFSIZE_BOUND (int32_t) == sizeof ("-2147483648"));
+  #endif
+  #ifdef INT64_MAX
+  VERIFY (INT_STRLEN_BOUND (int64_t) == sizeof ("-9223372036854775808") - 1);
+  VERIFY (INT_BUFSIZE_BOUND (int64_t) == sizeof ("-9223372036854775808"));
+  #endif
+
+  /* All the INT_<op>_RANGE_OVERFLOW tests are equally valid as
+     INT_<op>_OVERFLOW tests, so define macros to do both.  OP is the
+     operation, OPNAME its symbolic name, A and B its operands, T the
+     result type, V the overflow flag, and VRES the result if V and if
+     two's complement.  CHECK_BINOP is for most binary operatinos,
+     CHECK_SBINOP for binary +, -, * when the result type is signed,
+     and CHECK_UNOP for unary operations.  */
+  #define CHECK_BINOP(op, opname, a, b, t, v, vres)                       \
+    VERIFY (INT_##opname##_RANGE_OVERFLOW (a, b, TYPE_MINIMUM (t),        \
+                                           TYPE_MAXIMUM (t))              \
+            == (v));                                                      \
+    VERIFY (INT_##opname##_OVERFLOW (a, b) == (v))
+  #define CHECK_SBINOP(op, opname, a, b, t, v, vres)                      \
+    CHECK_BINOP(op, opname, a, b, t, v, vres);                            \
+    {                                                                     \
+      t result;                                                           \
+      ASSERT (INT_##opname##_WRAPV (a, b, &result) == (v));               \
+      ASSERT (result == ((v) ? (vres) : ((a) op (b))));                   \
+    }
+  #define CHECK_UNOP(op, opname, a, t, v)                                 \
+    VERIFY (INT_##opname##_RANGE_OVERFLOW (a, TYPE_MINIMUM (t),           \
+                                           TYPE_MAXIMUM (t))              \
+            == (v));                                                      \
+    VERIFY (INT_##opname##_OVERFLOW (a) == (v))
+
+  /* INT_<op>_RANGE_OVERFLOW, INT_<op>_OVERFLOW.  */
+  VERIFY (INT_ADD_RANGE_OVERFLOW (INT_MAX, 1, INT_MIN, INT_MAX));
+  VERIFY (INT_ADD_OVERFLOW (INT_MAX, 1));
+
+  CHECK_SBINOP (+, ADD, INT_MAX, 1, int, true, INT_MIN);
+  CHECK_SBINOP (+, ADD, INT_MAX, -1, int, false, INT_MAX - 1);
+  CHECK_SBINOP (+, ADD, INT_MIN, 1, int, false, INT_MIN + 1);
+  CHECK_SBINOP (+, ADD, INT_MIN, -1, int, true, INT_MAX);
+  CHECK_BINOP (+, ADD, UINT_MAX, 1u, unsigned int, true, 0u);
+  CHECK_BINOP (+, ADD, 0u, 1u, unsigned int, false, 1u);
+
+  CHECK_SBINOP (-, SUBTRACT, INT_MAX, 1, int, false, INT_MAX - 1);
+  CHECK_SBINOP (-, SUBTRACT, INT_MAX, -1, int, true, INT_MIN);
+  CHECK_SBINOP (-, SUBTRACT, INT_MIN, 1, int, true, INT_MAX);
+  CHECK_SBINOP (-, SUBTRACT, INT_MIN, -1, int, false, INT_MIN - -1);
+  CHECK_BINOP (-, SUBTRACT, UINT_MAX, 1u, unsigned int, false, UINT_MAX - 1u);
+  CHECK_BINOP (-, SUBTRACT, 0u, 1u, unsigned int, true, 0u - 1u);
+
+  CHECK_UNOP (-, NEGATE, INT_MIN, int, true);
+  CHECK_UNOP (-, NEGATE, 0, int, false);
+  CHECK_UNOP (-, NEGATE, INT_MAX, int, false);
+  CHECK_UNOP (-, NEGATE, 0u, unsigned int, false);
+  CHECK_UNOP (-, NEGATE, 1u, unsigned int, true);
+  CHECK_UNOP (-, NEGATE, UINT_MAX, unsigned int, true);
+
+  CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MAX, int, true, 1);
+  CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MIN, int, true, INT_MIN);
+  CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MAX, int, true, INT_MIN);
+  CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MIN, int, true, 0);
+  CHECK_SBINOP (*, MULTIPLY, -1, INT_MIN, int,
+                INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
+#if !defined __HP_cc
+  CHECK_SBINOP (*, MULTIPLY, LONG_MIN / INT_MAX, (long int) INT_MAX,
+                long int, false, LONG_MIN - LONG_MIN % INT_MAX);
+#endif
+
+  CHECK_BINOP (/, DIVIDE, INT_MIN, -1, int,
+               INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
+  CHECK_BINOP (/, DIVIDE, INT_MAX, 1, int, false, INT_MAX);
+  CHECK_BINOP (/, DIVIDE, (unsigned int) INT_MIN, -1u, unsigned int,
+               false, INT_MIN / -1u);
+
+  CHECK_BINOP (%, REMAINDER, INT_MIN, -1, int, INT_NEGATE_OVERFLOW (INT_MIN), 0);
+  CHECK_BINOP (%, REMAINDER, INT_MAX, 1, int, false, 0);
+  CHECK_BINOP (%, REMAINDER, (unsigned int) INT_MIN, -1u, unsigned int,
+               false, INT_MIN % -1u);
+
+  CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX, 1, unsigned int, true, UINT_MAX << 1);
+  CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2 + 1, 1, unsigned int, true,
+               (UINT_MAX / 2 + 1) << 1);
+  CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2, 1, unsigned int, false,
+               (UINT_MAX / 2) << 1);
+
+  /* INT_<op>_OVERFLOW and INT_<op>_WRAPV with mixed types.  */
+  #define CHECK_SUM(a, b, t, v, vres)                                     \
+    CHECK_SUM1 (a, b, t, v, vres);                                        \
+    CHECK_SUM1 (b, a, t, v, vres)
+  #define CHECK_SUM_WRAPV(a, b, t, v, vres, okres)                        \
+    CHECK_SUM_WRAPV1 (a, b, t, v, vres, okres);                           \
+    CHECK_SUM_WRAPV1 (b, a, t, v, vres, okres)
+  #define CHECK_SUM1(a, b, t, v, vres)                                    \
+    VERIFY (INT_ADD_OVERFLOW (a, b) == (v));                              \
+    CHECK_SUM_WRAPV1 (a, b, t, v, vres, (a) + (b))
+  #define CHECK_SUM_WRAPV1(a, b, t, v, vres, okres)                       \
+    {                                                                     \
+      t result;                                                           \
+      ASSERT (INT_ADD_WRAPV (a, b, &result) == (v));                      \
+      ASSERT (result == ((v) ? (vres) : (okres)));                        \
+    }
+  CHECK_SUM (-1, LONG_MIN, long int, true, LONG_MAX);
+  CHECK_SUM (-1, UINT_MAX, unsigned int, false, DONTCARE);
+  CHECK_SUM (-1L, INT_MIN, long int, INT_MIN == LONG_MIN,
+              INT_MIN == LONG_MIN ? INT_MAX : DONTCARE);
+  CHECK_SUM (0u, -1, unsigned int, true, 0u + -1);
+  CHECK_SUM (0u, 0, unsigned int, false, DONTCARE);
+  CHECK_SUM (0u, 1, unsigned int, false, DONTCARE);
+  CHECK_SUM (1, LONG_MAX, long int, true, LONG_MIN);
+  CHECK_SUM (1, UINT_MAX, unsigned int, true, 0u);
+  CHECK_SUM (1L, INT_MAX, long int, INT_MAX == LONG_MAX,
+              INT_MAX == LONG_MAX ? INT_MIN : DONTCARE);
+  CHECK_SUM (1u, INT_MAX, unsigned int, INT_MAX == UINT_MAX, 1u + INT_MAX);
+  CHECK_SUM (1u, INT_MIN, unsigned int, true, 1u + INT_MIN);
+  CHECK_SUM_WRAPV (-1, 1u, int, false, DONTCARE, 0);
+  CHECK_SUM_WRAPV (-1, 1ul, int, false, DONTCARE, 0);
+  CHECK_SUM_WRAPV (-1l, 1u, int, false, DONTCARE, 0);
+  CHECK_SUM_WRAPV (-100, 1000u, int, false, DONTCARE, 900);
+  CHECK_SUM_WRAPV (INT_MIN, UINT_MAX, int, false, DONTCARE, INT_MAX);
+  CHECK_SUM_WRAPV (1u, INT_MAX, int, true, INT_MIN, DONTCARE);
+  CHECK_SUM_WRAPV (INT_MAX, 1, long int, LONG_MAX <= INT_MAX, INT_MIN,
+                   INT_MAX + 1L);
+  CHECK_SUM_WRAPV (UINT_MAX, 1, long int, LONG_MAX <= UINT_MAX, 0,
+                   UINT_MAX + 1L);
+  CHECK_SUM_WRAPV (INT_MAX, 1, unsigned long int, ULONG_MAX <= INT_MAX, 0,
+                   INT_MAX + 1uL);
+  CHECK_SUM_WRAPV (UINT_MAX, 1, unsigned long int, ULONG_MAX <= UINT_MAX, 0,
+                   UINT_MAX + 1uL);
+
+  {
+    long int result;
+    ASSERT (INT_ADD_WRAPV (1, INT_MAX, &result) == (INT_MAX == LONG_MAX));
+    ASSERT (INT_ADD_WRAPV (-1, INT_MIN, &result) == (INT_MIN == LONG_MIN));
+  }
+
+  #define CHECK_DIFFERENCE(a, b, t, v, vres)                              \
+    VERIFY (INT_SUBTRACT_OVERFLOW (a, b) == (v))
+  #define CHECK_SDIFFERENCE(a, b, t, v, vres)                             \
+    CHECK_DIFFERENCE (a, b, t, v, vres);                                  \
+    CHECK_SDIFFERENCE_WRAPV (a, b, t, v, vres)
+  #define CHECK_SDIFFERENCE_WRAPV(a, b, t, v, vres)                       \
+    {                                                                     \
+      t result;                                                           \
+      ASSERT (INT_SUBTRACT_WRAPV (a, b, &result) == (v));                 \
+      ASSERT (result == ((v) ? (vres) : ((a) - (b))));                    \
+    }
+  CHECK_DIFFERENCE (INT_MAX, 1u, unsigned int, UINT_MAX < INT_MAX - 1,
+                    INT_MAX - 1u);
+  CHECK_DIFFERENCE (UINT_MAX, 1, unsigned int, false, UINT_MAX - 1);
+  CHECK_DIFFERENCE (0u, -1, unsigned int, false, 0u - -1);
+  CHECK_DIFFERENCE (UINT_MAX, -1, unsigned int, true, UINT_MAX - -1);
+  CHECK_DIFFERENCE (INT_MIN, 1u, unsigned int, true, INT_MIN - 1u);
+  CHECK_DIFFERENCE (-1, 0u, unsigned int, true, -1 - 0u);
+  CHECK_SDIFFERENCE (-1, INT_MIN, int, false, -1 - INT_MIN);
+  CHECK_SDIFFERENCE (-1, INT_MAX, int, false, -1 - INT_MAX);
+  CHECK_SDIFFERENCE (0, INT_MIN, int, INT_MIN < -INT_MAX, INT_MIN);
+  CHECK_SDIFFERENCE (0, INT_MAX, int, false, 0 - INT_MAX);
+  CHECK_SDIFFERENCE_WRAPV (-1, 1u, int, false, DONTCARE);
+  CHECK_SDIFFERENCE_WRAPV (-1, 1ul, int, false, DONTCARE);
+  CHECK_SDIFFERENCE_WRAPV (-1l, 1u, int, false, DONTCARE);
+  CHECK_SDIFFERENCE_WRAPV (0u, INT_MAX, int, false, DONTCARE);
+  CHECK_SDIFFERENCE_WRAPV (1u, INT_MIN, int, true, 1u - INT_MIN);
+  {
+    long int result;
+    ASSERT (INT_SUBTRACT_WRAPV (INT_MAX, -1, &result) == (INT_MAX == LONG_MAX));
+    ASSERT (INT_SUBTRACT_WRAPV (INT_MIN, 1, &result) == (INT_MAX == LONG_MAX));
+  }
+
+  #define CHECK_PRODUCT(a, b, t, v, vres)                                 \
+    CHECK_PRODUCT1 (a, b, t, v, vres);                                    \
+    CHECK_PRODUCT1 (b, a, t, v, vres)
+  #define CHECK_SPRODUCT(a, b, t, v, vres)                                \
+    CHECK_SPRODUCT1 (a, b, t, v, vres);                                   \
+    CHECK_SPRODUCT1 (b, a, t, v, vres)
+  #define CHECK_SPRODUCT_WRAPV(a, b, t, v, vres)                          \
+    CHECK_SPRODUCT_WRAPV1 (a, b, t, v, vres);                             \
+    CHECK_SPRODUCT_WRAPV1 (b, a, t, v, vres)
+  #define CHECK_PRODUCT1(a, b, t, v, vres)                                \
+    VERIFY (INT_MULTIPLY_OVERFLOW (a, b) == (v))
+  #define CHECK_SPRODUCT1(a, b, t, v, vres)                               \
+    CHECK_PRODUCT1 (a, b, t, v, vres);                                    \
+    CHECK_SPRODUCT_WRAPV1 (a, b, t, v, vres)
+  #define CHECK_SPRODUCT_WRAPV1(a, b, t, v, vres)                         \
+    {                                                                     \
+      t result;                                                           \
+      ASSERT (INT_MULTIPLY_WRAPV (a, b, &result) == (v));                 \
+      ASSERT (result == ((v) ? (vres) : ((a) * (b))));                    \
+    }
+  CHECK_PRODUCT (-1, 1u, unsigned int, true, -1 * 1u);
+  CHECK_SPRODUCT (-1, INT_MIN, int, INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN);
+  CHECK_PRODUCT (-1, UINT_MAX, unsigned int, true, -1 * UINT_MAX);
+  CHECK_SPRODUCT (-32768, LONG_MAX / -32768 - 1, long int, true, LONG_MIN);
+  CHECK_SPRODUCT (-12345, LONG_MAX / -12345, long int, false, DONTCARE);
+  CHECK_SPRODUCT (0, -1, int, false, DONTCARE);
+  CHECK_SPRODUCT (0, 0, int, false, DONTCARE);
+  CHECK_PRODUCT (0, 0u, unsigned int, false, DONTCARE);
+  CHECK_SPRODUCT (0, 1, int, false, DONTCARE);
+  CHECK_SPRODUCT (0, INT_MAX, int, false, DONTCARE);
+  CHECK_SPRODUCT (0, INT_MIN, int, false, DONTCARE);
+  CHECK_PRODUCT (0, UINT_MAX, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, -1, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, 0, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, 0u, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, 1, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, INT_MAX, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, INT_MIN, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (0u, UINT_MAX, unsigned int, false, DONTCARE);
+  CHECK_SPRODUCT (1, INT_MAX, int, false, DONTCARE);
+  CHECK_SPRODUCT (1, INT_MIN, int, false, DONTCARE);
+  CHECK_PRODUCT (1, UINT_MAX, unsigned int, false, DONTCARE);
+  CHECK_PRODUCT (1u, INT_MIN, unsigned int, true, 1u * INT_MIN);
+  CHECK_PRODUCT (1u, INT_MAX, unsigned int, UINT_MAX < INT_MAX, 1u * INT_MAX);
+  CHECK_PRODUCT (INT_MAX, UINT_MAX, unsigned int, true, INT_MAX * UINT_MAX);
+  CHECK_PRODUCT (INT_MAX, ULONG_MAX, unsigned long int, true,
+                 INT_MAX * ULONG_MAX);
+#if !defined __HP_cc
+  CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN - 1, long int, true, LONG_MIN);
+  CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN, long int, false, DONTCARE);
+#endif
+  CHECK_PRODUCT (INT_MIN, UINT_MAX, unsigned int, true, INT_MIN * UINT_MAX);
+  CHECK_PRODUCT (INT_MIN, ULONG_MAX, unsigned long int, true,
+                 INT_MIN * ULONG_MAX);
+  CHECK_SPRODUCT_WRAPV (-1, INT_MAX + 1u, int, false, DONTCARE);
+  CHECK_SPRODUCT_WRAPV (-1, 1u, int, false, DONTCARE);
+  CHECK_SPRODUCT (0, ULONG_MAX, int, false, DONTCARE);
+  CHECK_SPRODUCT (0u, LONG_MIN, int, false, DONTCARE);
+  {
+    long int result;
+    ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result)
+            == (LONG_MAX / INT_MAX < INT_MAX));
+    ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result)
+            || result == INT_MAX * (long int) INT_MAX);
+    ASSERT (INT_MULTIPLY_WRAPV (INT_MIN, INT_MIN, &result)
+            || result == INT_MIN * (long int) INT_MIN);
+  }
+
+# ifdef LLONG_MAX
+  {
+    long long int result;
+    ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result)
+            == (LLONG_MAX / LONG_MAX < LONG_MAX));
+    ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result)
+            || result == LONG_MAX * (long long int) LONG_MAX);
+    ASSERT (INT_MULTIPLY_WRAPV (LONG_MIN, LONG_MIN, &result)
+            || result == LONG_MIN * (long long int) LONG_MIN);
+  }
+# endif
+
+  /* Check for GCC bug 91450.  */
+  {
+    unsigned long long result;
+    ASSERT (INT_MULTIPLY_WRAPV (int_minus_2, int_1, &result) && result == -2);
+  }
+
+  #define CHECK_QUOTIENT(a, b, v) VERIFY (INT_DIVIDE_OVERFLOW (a, b) == (v))
+
+  CHECK_QUOTIENT (INT_MIN, -1L, INT_MIN == LONG_MIN);
+  CHECK_QUOTIENT (INT_MIN, UINT_MAX, false);
+  CHECK_QUOTIENT (INTMAX_MIN, UINTMAX_MAX, false);
+  CHECK_QUOTIENT (INTMAX_MIN, UINT_MAX, false);
+  CHECK_QUOTIENT (-11, 10u, true);
+  CHECK_QUOTIENT (-10, 10u, true);
+  CHECK_QUOTIENT (-9, 10u, false);
+  CHECK_QUOTIENT (11u, -10, true);
+  CHECK_QUOTIENT (10u, -10, true);
+  CHECK_QUOTIENT (9u, -10, false);
+
+  #define CHECK_REMAINDER(a, b, v) VERIFY (INT_REMAINDER_OVERFLOW (a, b) == (v))
+
+  CHECK_REMAINDER (INT_MIN, -1L, INT_MIN == LONG_MIN);
+  CHECK_REMAINDER (-1, UINT_MAX, true);
+  CHECK_REMAINDER ((intmax_t) -1, UINTMAX_MAX, true);
+  CHECK_REMAINDER (INTMAX_MIN, UINT_MAX,
+                   (INTMAX_MAX < UINT_MAX
+                    && - (unsigned int) INTMAX_MIN % UINT_MAX != 0));
+  CHECK_REMAINDER (INT_MIN, ULONG_MAX, INT_MIN % ULONG_MAX != 1);
+  CHECK_REMAINDER (1u, -1, false);
+  CHECK_REMAINDER (37*39u, -39, false);
+  CHECK_REMAINDER (37*39u + 1, -39, true);
+  CHECK_REMAINDER (37*39u - 1, -39, true);
+  CHECK_REMAINDER (LONG_MAX, -INT_MAX, false);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-inttostr.c b/src/gl/tests/test-inttostr.c
new file mode 100644
index 0000000..9422ad4
--- /dev/null
+++ b/src/gl/tests/test-inttostr.c
@@ -0,0 +1,94 @@
+/* Test inttostr functions, and incidentally, INT_BUFSIZE_BOUND
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#include <config.h>
+
+#include "inttostr.h"
+#include "intprops.h"
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+#define STREQ(a, b) (strcmp (a, b) == 0)
+#define IS_TIGHT(T) (_GL_SIGNED_TYPE_OR_EXPR (T) == TYPE_SIGNED (T))
+#define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
+
+/* Verify that an inttostr function works as advertised.
+   Convert maximum and minimum (per-type, T) values using both snprintf --
+   with a cast to intmax_t or uintmax_t -- and FN, and compare the
+   resulting strings.  Use malloc for the inttostr buffer, so that if
+   we ever exceed the usually-tight INT_BUFSIZE_BOUND, tools like
+   valgrind will detect the failure. */
+#define CK(T, Fn)                                                       \
+  do                                                                    \
+    {                                                                   \
+      char ref[100];                                                    \
+      char *buf = malloc (INT_BUFSIZE_BOUND (T));                       \
+      char const *p;                                                    \
+      ASSERT (buf);                                                     \
+      *buf = '\0';                                                      \
+      ASSERT                                                            \
+        ((TYPE_SIGNED (T)                                               \
+          ? snprintf (ref, sizeof ref, "%jd", (intmax_t) TYPE_MINIMUM (T)) \
+          : snprintf (ref, sizeof ref, "%ju", (uintmax_t) TYPE_MINIMUM (T))) \
+         < sizeof ref);                                                 \
+      ASSERT (STREQ ((p = Fn (TYPE_MINIMUM (T), buf)), ref));           \
+      /* Ensure that INT_BUFSIZE_BOUND is tight for signed types.  */   \
+      ASSERT (! TYPE_SIGNED (T) || (p == buf && *p == '-'));            \
+      ASSERT                                                            \
+        ((TYPE_SIGNED (T)                                               \
+          ? snprintf (ref, sizeof ref, "%jd", (intmax_t) TYPE_MAXIMUM (T)) \
+          : snprintf (ref, sizeof ref, "%ju", (uintmax_t) TYPE_MAXIMUM (T))) \
+         < sizeof ref);                                                 \
+      ASSERT (STREQ ((p = Fn (TYPE_MAXIMUM (T), buf)), ref));           \
+      /* For unsigned types, the bound is not always tight.  */         \
+      ASSERT (! IS_TIGHT (T) || TYPE_SIGNED (T)                         \
+              || (p == buf && ISDIGIT (*p)));                           \
+      free (buf);                                                       \
+    }                                                                   \
+  while (0)
+
+int
+main (void)
+{
+  size_t b_size = 2;
+  char *b = malloc (b_size);
+  ASSERT (b);
+
+  /* Ideally we would rely on the snprintf-posix module, in which case
+     this guard would not be required, but due to limitations in gnulib's
+     implementation (see modules/snprintf-posix), we cannot.  */
+  if (snprintf (b, b_size, "%ju", (uintmax_t) 3) == 1
+      && b[0] == '3' && b[1] == '\0')
+    {
+      CK (int,          inttostr);
+      CK (unsigned int, uinttostr);
+      CK (off_t,        offtostr);
+      CK (uintmax_t,    umaxtostr);
+      CK (intmax_t,     imaxtostr);
+      free (b);
+      return 0;
+    }
+
+  /* snprintf doesn't accept %ju; skip this test.  */
+  free (b);
+  return 77;
+}
diff --git a/src/gl/tests/test-inttypes.c b/src/gl/tests/test-inttypes.c
new file mode 100644
index 0000000..f7f2e3a
--- /dev/null
+++ b/src/gl/tests/test-inttypes.c
@@ -0,0 +1,118 @@
+/* Test of <inttypes.h> substitute.
+   Copyright (C) 2006-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <inttypes.h>
+
+#include <stddef.h>
+
+/* Tests for macros supposed to be defined in inttypes.h.  */
+
+const char *k = /* implicit string concatenation */
+#ifdef INT8_MAX
+  PRId8 PRIi8
+#endif
+#ifdef UINT8_MAX
+  PRIo8 PRIu8 PRIx8 PRIX8
+#endif
+#ifdef INT16_MAX
+  PRId16 PRIi16
+#endif
+#ifdef UINT16_MAX
+  PRIo16 PRIu16 PRIx16 PRIX16
+#endif
+#ifdef INT32_MAX
+  PRId32 PRIi32
+#endif
+#ifdef UINT32_MAX
+  PRIo32 PRIu32 PRIx32 PRIX32
+#endif
+#ifdef INT64_MAX
+  PRId64 PRIi64
+#endif
+#ifdef UINT64_MAX
+  PRIo64 PRIu64 PRIx64 PRIX64
+#endif
+  PRIdLEAST8 PRIiLEAST8 PRIoLEAST8 PRIuLEAST8 PRIxLEAST8 PRIXLEAST8
+  PRIdLEAST16 PRIiLEAST16 PRIoLEAST16 PRIuLEAST16 PRIxLEAST16 PRIXLEAST16
+  PRIdLEAST32 PRIiLEAST32 PRIoLEAST32 PRIuLEAST32 PRIxLEAST32 PRIXLEAST32
+  PRIdLEAST64 PRIiLEAST64
+  PRIoLEAST64 PRIuLEAST64 PRIxLEAST64 PRIXLEAST64
+  PRIdFAST8 PRIiFAST8 PRIoFAST8 PRIuFAST8 PRIxFAST8 PRIXFAST8
+  PRIdFAST16 PRIiFAST16 PRIoFAST16 PRIuFAST16 PRIxFAST16 PRIXFAST16
+  PRIdFAST32 PRIiFAST32 PRIoFAST32 PRIuFAST32 PRIxFAST32 PRIXFAST32
+  PRIdFAST64 PRIiFAST64
+  PRIoFAST64 PRIuFAST64 PRIxFAST64 PRIXFAST64
+  PRIdMAX PRIiMAX PRIoMAX PRIuMAX PRIxMAX PRIXMAX
+#ifdef INTPTR_MAX
+  PRIdPTR PRIiPTR
+#endif
+#ifdef UINTPTR_MAX
+  PRIoPTR PRIuPTR PRIxPTR PRIXPTR
+#endif
+  ;
+const char *l = /* implicit string concatenation */
+#ifdef INT8_MAX
+  SCNd8 SCNi8
+#endif
+#ifdef UINT8_MAX
+  SCNo8 SCNu8 SCNx8
+#endif
+#ifdef INT16_MAX
+  SCNd16 SCNi16
+#endif
+#ifdef UINT16_MAX
+  SCNo16 SCNu16 SCNx16
+#endif
+#ifdef INT32_MAX
+  SCNd32 SCNi32
+#endif
+#ifdef UINT32_MAX
+  SCNo32 SCNu32 SCNx32
+#endif
+#ifdef INT64_MAX
+  SCNd64 SCNi64
+#endif
+#ifdef UINT64_MAX
+  SCNo64 SCNu64 SCNx64
+#endif
+  SCNdLEAST8 SCNiLEAST8 SCNoLEAST8 SCNuLEAST8 SCNxLEAST8
+  SCNdLEAST16 SCNiLEAST16 SCNoLEAST16 SCNuLEAST16 SCNxLEAST16
+  SCNdLEAST32 SCNiLEAST32 SCNoLEAST32 SCNuLEAST32 SCNxLEAST32
+  SCNdLEAST64 SCNiLEAST64
+  SCNoLEAST64 SCNuLEAST64 SCNxLEAST64
+  SCNdFAST8 SCNiFAST8 SCNoFAST8 SCNuFAST8 SCNxFAST8
+  SCNdFAST16 SCNiFAST16 SCNoFAST16 SCNuFAST16 SCNxFAST16
+  SCNdFAST32 SCNiFAST32 SCNoFAST32 SCNuFAST32 SCNxFAST32
+  SCNdFAST64 SCNiFAST64
+  SCNoFAST64 SCNuFAST64 SCNxFAST64
+  SCNdMAX SCNiMAX SCNoMAX SCNuMAX SCNxMAX
+#ifdef INTPTR_MAX
+  SCNdPTR SCNiPTR
+#endif
+#ifdef UINTPTR_MAX
+  SCNoPTR SCNuPTR SCNxPTR
+#endif
+  ;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-ioctl.c b/src/gl/tests/test-ioctl.c
new file mode 100644
index 0000000..6d7b629
--- /dev/null
+++ b/src/gl/tests/test-ioctl.c
@@ -0,0 +1,51 @@
+/* Test of ioctl() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <sys/ioctl.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (ioctl, int, (int, int, ...));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+#ifdef FIONREAD
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    int value;
+    errno = 0;
+    ASSERT (ioctl (-1, FIONREAD, &value) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    int value;
+    close (99);
+    errno = 0;
+    ASSERT (ioctl (99, FIONREAD, &value) == -1);
+    ASSERT (errno == EBADF);
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-isblank.c b/src/gl/tests/test-isblank.c
new file mode 100644
index 0000000..eca2366
--- /dev/null
+++ b/src/gl/tests/test-isblank.c
@@ -0,0 +1,50 @@
+/* Test of isblank() function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <ctype.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (isblank, int, (int));
+
+#include <limits.h>
+#include <stdio.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  unsigned int c;
+
+  /* Verify the property in the "C" locale.
+     POSIX specifies in
+       <https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html>
+     that
+       - in all locales, the blank characters include the <space> and <tab>
+         characters,
+       - in the "POSIX" locale (which is usually the same as the "C" locale),
+         the blank characters include only the ASCII <space> and <tab>
+         characters.  */
+  for (c = 0; c <= UCHAR_MAX; c++)
+    ASSERT (!isblank (c) == !(c == ' ' || c == '\t'));
+  ASSERT (!isblank (EOF));
+
+  return 0;
+}
diff --git a/src/gl/tests/test-langinfo.c b/src/gl/tests/test-langinfo.c
new file mode 100644
index 0000000..4215ea7
--- /dev/null
+++ b/src/gl/tests/test-langinfo.c
@@ -0,0 +1,92 @@
+/* Test of <langinfo.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include <langinfo.h>
+
+/* Check that all the nl_item values are defined.  */
+int items[] =
+  {
+    /* nl_langinfo items of the LC_CTYPE category */
+    CODESET,
+    /* nl_langinfo items of the LC_NUMERIC category */
+    RADIXCHAR,
+    THOUSEP,
+    /* nl_langinfo items of the LC_TIME category */
+    D_T_FMT,
+    D_FMT,
+    T_FMT,
+    T_FMT_AMPM,
+    AM_STR,
+    PM_STR,
+    DAY_1,
+    DAY_2,
+    DAY_3,
+    DAY_4,
+    DAY_5,
+    DAY_6,
+    DAY_7,
+    ABDAY_1,
+    ABDAY_2,
+    ABDAY_3,
+    ABDAY_4,
+    ABDAY_5,
+    ABDAY_6,
+    ABDAY_7,
+    MON_1,
+    MON_2,
+    MON_3,
+    MON_4,
+    MON_5,
+    MON_6,
+    MON_7,
+    MON_8,
+    MON_9,
+    MON_10,
+    MON_11,
+    MON_12,
+    ABMON_1,
+    ABMON_2,
+    ABMON_3,
+    ABMON_4,
+    ABMON_5,
+    ABMON_6,
+    ABMON_7,
+    ABMON_8,
+    ABMON_9,
+    ABMON_10,
+    ABMON_11,
+    ABMON_12,
+    ERA,
+    ERA_D_FMT,
+    ERA_D_T_FMT,
+    ERA_T_FMT,
+    ALT_DIGITS,
+    /* nl_langinfo items of the LC_MONETARY category */
+    CRNCYSTR,
+    /* nl_langinfo items of the LC_MESSAGES category */
+    YESEXPR,
+    NOEXPR
+  };
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-limits-h.c b/src/gl/tests/test-limits-h.c
new file mode 100644
index 0000000..4144013
--- /dev/null
+++ b/src/gl/tests/test-limits-h.c
@@ -0,0 +1,117 @@
+/* Test of <limits.h> substitute.
+   Copyright 2016-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <config.h>
+
+#include <limits.h>
+
+#include "verify.h"
+
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Woverlength-strings"
+#endif
+
+#define verify_width(width, min, max) \
+  verify ((max) >> ((width) - 1 - ((min) < 0)) == 1)
+
+/* Macros borrowed from intprops.h.  */
+#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+#define TYPE_WIDTH(t) (sizeof (t) * CHAR_BIT)
+#define TYPE_MINIMUM(t) ((t) ~ TYPE_MAXIMUM (t))
+#define TYPE_MAXIMUM(t)                                                 \
+  ((t) (! TYPE_SIGNED (t)                                               \
+        ? (t) -1                                                        \
+        : ((((t) 1 << (TYPE_WIDTH (t) - 2)) - 1) * 2 + 1)))
+
+/* Type width macros.  */
+
+int type_bits[] =
+  {
+    CHAR_BIT,
+    WORD_BIT,
+    LONG_BIT
+  };
+verify_width (CHAR_BIT, CHAR_MIN, CHAR_MAX);
+verify_width (WORD_BIT, INT_MIN, INT_MAX);
+verify_width (LONG_BIT, LONG_MIN, LONG_MAX);
+
+/* Numerical limit macros.  */
+
+char               limits1[]  = { CHAR_MIN, CHAR_MAX };
+verify (TYPE_MINIMUM (char) == CHAR_MIN);
+verify (TYPE_MAXIMUM (char) == CHAR_MAX);
+
+signed char        limits2[]  = { SCHAR_MIN, SCHAR_MAX };
+verify (TYPE_MINIMUM (signed char) == SCHAR_MIN);
+verify (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
+
+unsigned char      limits3[]  = { UCHAR_MAX };
+verify (TYPE_MINIMUM (unsigned char) == 0);
+verify (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
+
+short              limits4[]  = { SHRT_MIN, SHRT_MAX };
+verify (TYPE_MINIMUM (short int) == SHRT_MIN);
+verify (TYPE_MAXIMUM (short int) == SHRT_MAX);
+
+unsigned short     limits5[]  = { USHRT_MAX };
+verify (TYPE_MINIMUM (unsigned short int) == 0);
+verify (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
+
+int                limits6[]  = { INT_MIN, INT_MAX };
+verify (TYPE_MINIMUM (int) == INT_MIN);
+verify (TYPE_MAXIMUM (int) == INT_MAX);
+
+unsigned int       limits7[]  = { UINT_MAX };
+verify (TYPE_MINIMUM (unsigned int) == 0);
+verify (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
+
+long               limits8[]  = { LONG_MIN, LONG_MAX };
+verify (TYPE_MINIMUM (long int) == LONG_MIN);
+verify (TYPE_MAXIMUM (long int) == LONG_MAX);
+
+unsigned long      limits9[]  = { ULONG_MAX };
+verify (TYPE_MINIMUM (unsigned long int) == 0);
+verify (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
+
+long long          limits10[] = { LLONG_MIN, LLONG_MAX };
+verify (TYPE_MINIMUM (long long int) == LLONG_MIN);
+verify (TYPE_MAXIMUM (long long int) == LLONG_MAX);
+
+unsigned long long limits11[] = { ULLONG_MAX };
+verify (TYPE_MINIMUM (unsigned long long int) == 0);
+verify (TYPE_MAXIMUM (unsigned long long int) == ULLONG_MAX);
+
+/* Macros specified by ISO/IEC TS 18661-1:2014.  */
+
+verify_width (CHAR_WIDTH, CHAR_MIN, CHAR_MAX);
+verify_width (SCHAR_WIDTH, SCHAR_MIN, SCHAR_MAX);
+verify_width (UCHAR_WIDTH, 0, UCHAR_MAX);
+verify_width (SHRT_WIDTH, SHRT_MIN, SHRT_MAX);
+verify_width (USHRT_WIDTH, 0, USHRT_MAX);
+verify_width (INT_WIDTH, INT_MIN, INT_MAX);
+verify_width (UINT_WIDTH, 0, UINT_MAX);
+verify_width (LONG_WIDTH, LONG_MIN, LONG_MAX);
+verify_width (ULONG_WIDTH, 0, ULONG_MAX);
+verify_width (LLONG_WIDTH, LLONG_MIN, LLONG_MAX);
+verify_width (ULLONG_WIDTH, 0, ULLONG_MAX);
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-linked_list.c b/src/gl/tests/test-linked_list.c
new file mode 100644
index 0000000..fff7e06
--- /dev/null
+++ b/src/gl/tests/test-linked_list.c
@@ -0,0 +1,459 @@
+/* Test of sequential list data type implementation.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2006.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "gl_linked_list.h"
+
+#include <stdlib.h>
+
+#include "gl_array_list.h"
+#include "macros.h"
+
+static const char *objects[15] =
+  {
+    "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o"
+  };
+
+#define RANDOM(n) (rand () % (n))
+#define RANDOM_OBJECT() objects[RANDOM (SIZEOF (objects))]
+
+static void
+check_equals (gl_list_t list1, gl_list_t list2)
+{
+  size_t n, i;
+
+  n = gl_list_size (list1);
+  ASSERT (n == gl_list_size (list2));
+  for (i = 0; i < n; i++)
+    {
+      ASSERT (gl_list_get_at (list1, i) == gl_list_get_at (list2, i));
+    }
+}
+
+static void
+check_equals_by_forward_iteration (gl_list_t list1, gl_list_t list2)
+{
+  gl_list_node_t node1 = gl_list_first_node (list1);
+  gl_list_node_t node2 = gl_list_first_node (list2);
+  while (node1 != NULL && node2 != NULL)
+    {
+      ASSERT (gl_list_node_value (list1, node1)
+              == gl_list_node_value (list2, node2));
+      node1 = gl_list_next_node (list1, node1);
+      node2 = gl_list_next_node (list2, node2);
+    }
+  ASSERT ((node1 == NULL) == (node2 == NULL));
+}
+
+static void
+check_equals_by_backward_iteration (gl_list_t list1, gl_list_t list2)
+{
+  gl_list_node_t node1 = gl_list_last_node (list1);
+  gl_list_node_t node2 = gl_list_last_node (list2);
+  while (node1 != NULL && node2 != NULL)
+    {
+      ASSERT (gl_list_node_value (list1, node1)
+              == gl_list_node_value (list2, node2));
+      node1 = gl_list_previous_node (list1, node1);
+      node2 = gl_list_previous_node (list2, node2);
+    }
+  ASSERT ((node1 == NULL) == (node2 == NULL));
+}
+
+static void
+check_all (gl_list_t list1, gl_list_t list2, gl_list_t list3)
+{
+  check_equals (list1, list2);
+  check_equals (list1, list3);
+}
+
+int
+main (int argc, char *argv[])
+{
+  gl_list_t list1, list2, list3;
+
+  /* Allow the user to provide a non-default random seed on the command line.  */
+  if (argc > 1)
+    srand (atoi (argv[1]));
+
+  {
+    size_t initial_size = RANDOM (50);
+    const void **contents =
+      (const void **) malloc (initial_size * sizeof (const void *));
+    size_t i;
+    unsigned int repeat;
+
+    for (i = 0; i < initial_size; i++)
+      contents[i] = RANDOM_OBJECT ();
+
+    /* Create list1.  */
+    list1 = gl_list_nx_create (GL_ARRAY_LIST, NULL, NULL, NULL, true,
+                               initial_size, contents);
+    ASSERT (list1 != NULL);
+    /* Create list2.  */
+    list2 = gl_list_nx_create_empty (GL_LINKED_LIST, NULL, NULL, NULL, true);
+    ASSERT (list2 != NULL);
+    for (i = 0; i < initial_size; i++)
+      ASSERT (gl_list_nx_add_last (list2, contents[i]) != NULL);
+
+    /* Create list3.  */
+    list3 = gl_list_nx_create (GL_LINKED_LIST, NULL, NULL, NULL, true,
+                               initial_size, contents);
+    ASSERT (list3 != NULL);
+
+    check_all (list1, list2, list3);
+
+    check_equals_by_forward_iteration (list1, list2);
+    check_equals_by_backward_iteration (list1, list2);
+
+    for (repeat = 0; repeat < 10000; repeat++)
+      {
+        unsigned int operation = RANDOM (18);
+        switch (operation)
+          {
+          case 0:
+            if (gl_list_size (list1) > 0)
+              {
+                size_t index = RANDOM (gl_list_size (list1));
+                const char *obj = RANDOM_OBJECT ();
+                gl_list_node_t node1, node2, node3;
+
+                node1 = gl_list_nx_set_at (list1, index, obj);
+                ASSERT (node1 != NULL);
+                ASSERT (gl_list_get_at (list1, index) == obj);
+                ASSERT (gl_list_node_value (list1, node1) == obj);
+
+                node2 = gl_list_nx_set_at (list2, index, obj);
+                ASSERT (node2 != NULL);
+                ASSERT (gl_list_get_at (list2, index) == obj);
+                ASSERT (gl_list_node_value (list2, node2) == obj);
+
+                node3 = gl_list_nx_set_at (list3, index, obj);
+                ASSERT (node3 != NULL);
+                ASSERT (gl_list_get_at (list3, index) == obj);
+                ASSERT (gl_list_node_value (list3, node3) == obj);
+
+                if (index > 0)
+                  {
+                    ASSERT (gl_list_node_value (list1, gl_list_previous_node (list1, node1))
+                            == gl_list_get_at (list1, index - 1));
+                    ASSERT (gl_list_node_value (list2, gl_list_previous_node (list3, node3))
+                            == gl_list_get_at (list2, index - 1));
+                    ASSERT (gl_list_node_value (list3, gl_list_previous_node (list3, node3))
+                            == gl_list_get_at (list2, index - 1));
+                  }
+                if (index + 1 < gl_list_size (list1))
+                  {
+                    ASSERT (gl_list_node_value (list1, gl_list_next_node (list1, node1))
+                            == gl_list_get_at (list1, index + 1));
+                    ASSERT (gl_list_node_value (list2, gl_list_next_node (list3, node3))
+                            == gl_list_get_at (list2, index + 1));
+                    ASSERT (gl_list_node_value (list3, gl_list_next_node (list3, node3))
+                            == gl_list_get_at (list2, index + 1));
+                  }
+              }
+            break;
+          case 1:
+            {
+              const char *obj = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2, node3;
+              node1 = gl_list_search (list1, obj);
+              node2 = gl_list_search (list2, obj);
+              node3 = gl_list_search (list3, obj);
+              if (node1 == NULL)
+                {
+                  ASSERT (node2 == NULL);
+                  ASSERT (node3 == NULL);
+                }
+              else
+                {
+                  ASSERT (node2 != NULL);
+                  ASSERT (node3 != NULL);
+                  ASSERT (gl_list_node_value (list1, node1) == obj);
+                  ASSERT (gl_list_node_value (list2, node2) == obj);
+                  ASSERT (gl_list_node_value (list3, node3) == obj);
+                }
+            }
+            break;
+          case 2:
+            {
+              const char *obj = RANDOM_OBJECT ();
+              size_t index1, index2, index3;
+              index1 = gl_list_indexof (list1, obj);
+              index2 = gl_list_indexof (list2, obj);
+              index3 = gl_list_indexof (list3, obj);
+              if (index1 == (size_t)(-1))
+                {
+                  ASSERT (index2 == (size_t)(-1));
+                  ASSERT (index3 == (size_t)(-1));
+                }
+              else
+                {
+                  ASSERT (index2 != (size_t)(-1));
+                  ASSERT (index3 != (size_t)(-1));
+                  ASSERT (gl_list_get_at (list1, index1) == obj);
+                  ASSERT (gl_list_get_at (list2, index2) == obj);
+                  ASSERT (gl_list_get_at (list3, index3) == obj);
+                  ASSERT (index2 == index1);
+                  ASSERT (index3 == index1);
+                }
+            }
+            break;
+          case 3: /* add 1 element */
+            {
+              const char *obj = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2, node3;
+              node1 = gl_list_nx_add_first (list1, obj);
+              ASSERT (node1 != NULL);
+              node2 = gl_list_nx_add_first (list2, obj);
+              ASSERT (node2 != NULL);
+              node3 = gl_list_nx_add_first (list3, obj);
+              ASSERT (node3 != NULL);
+              ASSERT (gl_list_node_value (list1, node1) == obj);
+              ASSERT (gl_list_node_value (list2, node2) == obj);
+              ASSERT (gl_list_node_value (list3, node3) == obj);
+              ASSERT (gl_list_get_at (list1, 0) == obj);
+              ASSERT (gl_list_get_at (list2, 0) == obj);
+              ASSERT (gl_list_get_at (list3, 0) == obj);
+            }
+            break;
+          case 4: /* add 1 element */
+            {
+              const char *obj = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2, node3;
+              node1 = gl_list_nx_add_last (list1, obj);
+              ASSERT (node1 != NULL);
+              node2 = gl_list_nx_add_last (list2, obj);
+              ASSERT (node2 != NULL);
+              node3 = gl_list_nx_add_last (list3, obj);
+              ASSERT (node3 != NULL);
+              ASSERT (gl_list_node_value (list1, node1) == obj);
+              ASSERT (gl_list_node_value (list2, node2) == obj);
+              ASSERT (gl_list_node_value (list3, node3) == obj);
+              ASSERT (gl_list_get_at (list1, gl_list_size (list1) - 1) == obj);
+              ASSERT (gl_list_get_at (list2, gl_list_size (list2) - 1) == obj);
+              ASSERT (gl_list_get_at (list3, gl_list_size (list3) - 1) == obj);
+            }
+            break;
+          case 5: /* add 3 elements */
+            {
+              const char *obj0 = RANDOM_OBJECT ();
+              const char *obj1 = RANDOM_OBJECT ();
+              const char *obj2 = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2, node3;
+              node1 = gl_list_nx_add_first (list1, obj2);
+              ASSERT (node1 != NULL);
+              node1 = gl_list_nx_add_before (list1, node1, obj0);
+              ASSERT (node1 != NULL);
+              node1 = gl_list_nx_add_after (list1, node1, obj1);
+              ASSERT (node1 != NULL);
+              node2 = gl_list_nx_add_first (list2, obj2);
+              ASSERT (node2 != NULL);
+              node2 = gl_list_nx_add_before (list2, node2, obj0);
+              ASSERT (node2 != NULL);
+              node2 = gl_list_nx_add_after (list2, node2, obj1);
+              ASSERT (node2 != NULL);
+              node3 = gl_list_nx_add_first (list3, obj2);
+              ASSERT (node3 != NULL);
+              node3 = gl_list_nx_add_before (list3, node3, obj0);
+              ASSERT (node3 != NULL);
+              node3 = gl_list_nx_add_after (list3, node3, obj1);
+              ASSERT (node3 != NULL);
+              ASSERT (gl_list_node_value (list1, node1) == obj1);
+              ASSERT (gl_list_node_value (list2, node2) == obj1);
+              ASSERT (gl_list_node_value (list3, node3) == obj1);
+              ASSERT (gl_list_get_at (list1, 0) == obj0);
+              ASSERT (gl_list_get_at (list1, 1) == obj1);
+              ASSERT (gl_list_get_at (list1, 2) == obj2);
+              ASSERT (gl_list_get_at (list2, 0) == obj0);
+              ASSERT (gl_list_get_at (list2, 1) == obj1);
+              ASSERT (gl_list_get_at (list2, 2) == obj2);
+              ASSERT (gl_list_get_at (list3, 0) == obj0);
+              ASSERT (gl_list_get_at (list3, 1) == obj1);
+              ASSERT (gl_list_get_at (list3, 2) == obj2);
+            }
+            break;
+          case 6: /* add 1 element */
+            {
+              size_t index = RANDOM (gl_list_size (list1) + 1);
+              const char *obj = RANDOM_OBJECT ();
+              gl_list_node_t node1, node2, node3;
+              node1 = gl_list_nx_add_at (list1, index, obj);
+              ASSERT (node1 != NULL);
+              node2 = gl_list_nx_add_at (list2, index, obj);
+              ASSERT (node2 != NULL);
+              node3 = gl_list_nx_add_at (list3, index, obj);
+              ASSERT (node3 != NULL);
+              ASSERT (gl_list_get_at (list1, index) == obj);
+              ASSERT (gl_list_node_value (list1, node1) == obj);
+              ASSERT (gl_list_get_at (list2, index) == obj);
+              ASSERT (gl_list_node_value (list2, node2) == obj);
+              ASSERT (gl_list_get_at (list3, index) == obj);
+              ASSERT (gl_list_node_value (list3, node3) == obj);
+              if (index > 0)
+                {
+                  ASSERT (gl_list_node_value (list1, gl_list_previous_node (list1, node1))
+                          == gl_list_get_at (list1, index - 1));
+                  ASSERT (gl_list_node_value (list2, gl_list_previous_node (list3, node3))
+                          == gl_list_get_at (list2, index - 1));
+                  ASSERT (gl_list_node_value (list3, gl_list_previous_node (list3, node3))
+                          == gl_list_get_at (list2, index - 1));
+                }
+              if (index + 1 < gl_list_size (list1))
+                {
+                  ASSERT (gl_list_node_value (list1, gl_list_next_node (list1, node1))
+                          == gl_list_get_at (list1, index + 1));
+                  ASSERT (gl_list_node_value (list2, gl_list_next_node (list3, node3))
+                          == gl_list_get_at (list2, index + 1));
+                  ASSERT (gl_list_node_value (list3, gl_list_next_node (list3, node3))
+                          == gl_list_get_at (list2, index + 1));
+                }
+            }
+            break;
+          case 7: case 8: /* remove 1 element */
+            if (gl_list_size (list1) > 0)
+              {
+                size_t n = gl_list_size (list1);
+                const char *obj = gl_list_get_at (list1, RANDOM (n));
+                gl_list_node_t node1, node2, node3;
+                node1 = gl_list_search (list1, obj);
+                node2 = gl_list_search (list2, obj);
+                node3 = gl_list_search (list3, obj);
+                ASSERT (node1 != NULL);
+                ASSERT (node2 != NULL);
+                ASSERT (node3 != NULL);
+                ASSERT (gl_list_remove_node (list1, node1));
+                ASSERT (gl_list_remove_node (list2, node2));
+                ASSERT (gl_list_remove_node (list3, node3));
+                ASSERT (gl_list_size (list1) == n - 1);
+              }
+            break;
+          case 9: case 10: /* remove 1 element */
+            if (gl_list_size (list1) > 0)
+              {
+                size_t n = gl_list_size (list1);
+                size_t index = RANDOM (n);
+                ASSERT (gl_list_remove_at (list1, index));
+                ASSERT (gl_list_remove_at (list2, index));
+                ASSERT (gl_list_remove_at (list3, index));
+                ASSERT (gl_list_size (list1) == n - 1);
+              }
+            break;
+          case 11: /* remove first element */
+            {
+              size_t n = gl_list_size (list1);
+              bool removed1 = gl_list_remove_first (list1);
+              ASSERT (gl_list_remove_first (list2) == removed1);
+              ASSERT (gl_list_remove_first (list3) == removed1);
+              ASSERT (gl_list_size (list1) == n - (int) removed1);
+            }
+            break;
+          case 12: /* remove last element */
+            {
+              size_t n = gl_list_size (list1);
+              bool removed1 = gl_list_remove_last (list1);
+              ASSERT (gl_list_remove_last (list2) == removed1);
+              ASSERT (gl_list_remove_last (list3) == removed1);
+              ASSERT (gl_list_size (list1) == n - (int) removed1);
+            }
+            break;
+          case 13: case 14: /* remove 1 element */
+            if (gl_list_size (list1) > 0)
+              {
+                size_t n = gl_list_size (list1);
+                const char *obj = gl_list_get_at (list1, RANDOM (n));
+                ASSERT (gl_list_remove (list1, obj));
+                ASSERT (gl_list_remove (list2, obj));
+                ASSERT (gl_list_remove (list3, obj));
+                ASSERT (gl_list_size (list1) == n - 1);
+              }
+            break;
+          case 15:
+            if (gl_list_size (list1) > 0)
+              {
+                size_t n = gl_list_size (list1);
+                const char *obj = "xyzzy";
+                ASSERT (!gl_list_remove (list1, obj));
+                ASSERT (!gl_list_remove (list2, obj));
+                ASSERT (!gl_list_remove (list3, obj));
+                ASSERT (gl_list_size (list1) == n);
+              }
+            break;
+          case 16:
+            {
+              size_t n = gl_list_size (list1);
+              gl_list_iterator_t iter1, iter2, iter3;
+              const void *elt;
+              iter1 = gl_list_iterator (list1);
+              iter2 = gl_list_iterator (list2);
+              iter3 = gl_list_iterator (list3);
+              for (i = 0; i < n; i++)
+                {
+                  ASSERT (gl_list_iterator_next (&iter1, &elt, NULL));
+                  ASSERT (gl_list_get_at (list1, i) == elt);
+                  ASSERT (gl_list_iterator_next (&iter2, &elt, NULL));
+                  ASSERT (gl_list_get_at (list2, i) == elt);
+                  ASSERT (gl_list_iterator_next (&iter3, &elt, NULL));
+                  ASSERT (gl_list_get_at (list3, i) == elt);
+                }
+              ASSERT (!gl_list_iterator_next (&iter1, &elt, NULL));
+              ASSERT (!gl_list_iterator_next (&iter2, &elt, NULL));
+              ASSERT (!gl_list_iterator_next (&iter3, &elt, NULL));
+              gl_list_iterator_free (&iter1);
+              gl_list_iterator_free (&iter2);
+              gl_list_iterator_free (&iter3);
+            }
+            break;
+          case 17:
+            {
+              size_t end = RANDOM (gl_list_size (list1) + 1);
+              size_t start = RANDOM (end + 1);
+              gl_list_iterator_t iter1, iter2, iter3;
+              const void *elt;
+              iter1 = gl_list_iterator_from_to (list1, start, end);
+              iter2 = gl_list_iterator_from_to (list2, start, end);
+              iter3 = gl_list_iterator_from_to (list3, start, end);
+              for (i = start; i < end; i++)
+                {
+                  ASSERT (gl_list_iterator_next (&iter1, &elt, NULL));
+                  ASSERT (gl_list_get_at (list1, i) == elt);
+                  ASSERT (gl_list_iterator_next (&iter2, &elt, NULL));
+                  ASSERT (gl_list_get_at (list2, i) == elt);
+                  ASSERT (gl_list_iterator_next (&iter3, &elt, NULL));
+                  ASSERT (gl_list_get_at (list3, i) == elt);
+                }
+              ASSERT (!gl_list_iterator_next (&iter1, &elt, NULL));
+              ASSERT (!gl_list_iterator_next (&iter2, &elt, NULL));
+              ASSERT (!gl_list_iterator_next (&iter3, &elt, NULL));
+              gl_list_iterator_free (&iter1);
+              gl_list_iterator_free (&iter2);
+              gl_list_iterator_free (&iter3);
+            }
+            break;
+          }
+        check_all (list1, list2, list3);
+      }
+
+    gl_list_free (list1);
+    gl_list_free (list2);
+    gl_list_free (list3);
+    free (contents);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-listen.c b/src/gl/tests/test-listen.c
new file mode 100644
index 0000000..3692514
--- /dev/null
+++ b/src/gl/tests/test-listen.c
@@ -0,0 +1,49 @@
+/* Test listen() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (listen, int, (int, int));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (listen (-1, 1) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (listen (99 ,1) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-locale.c b/src/gl/tests/test-locale.c
new file mode 100644
index 0000000..59644fa
--- /dev/null
+++ b/src/gl/tests/test-locale.c
@@ -0,0 +1,80 @@
+/* Test of <locale.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <locale.h>
+
+#include "verify.h"
+
+int a[] =
+  {
+    LC_ALL,
+    LC_COLLATE,
+    LC_CTYPE,
+    LC_MESSAGES,
+    LC_MONETARY,
+    LC_NUMERIC,
+    LC_TIME
+  };
+
+/* Check that the 'struct lconv' type is defined.  */
+struct lconv l;
+int ls;
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+int
+main ()
+{
+#if HAVE_WORKING_NEWLOCALE
+  /* Check that the locale_t type and the LC_GLOBAL_LOCALE macro are defined.  */
+  locale_t b = LC_GLOBAL_LOCALE;
+  (void) b;
+#endif
+
+  /* Check that 'struct lconv' has the ISO C and POSIX specified members.  */
+  ls += sizeof (*l.decimal_point);
+  ls += sizeof (*l.thousands_sep);
+  ls += sizeof (*l.grouping);
+  ls += sizeof (*l.mon_decimal_point);
+  ls += sizeof (*l.mon_thousands_sep);
+  ls += sizeof (*l.mon_grouping);
+  ls += sizeof (*l.positive_sign);
+  ls += sizeof (*l.negative_sign);
+  ls += sizeof (*l.currency_symbol);
+  ls += sizeof (l.frac_digits);
+  ls += sizeof (l.p_cs_precedes);
+  ls += sizeof (l.p_sign_posn);
+  ls += sizeof (l.p_sep_by_space);
+  ls += sizeof (l.n_cs_precedes);
+  ls += sizeof (l.n_sign_posn);
+  ls += sizeof (l.n_sep_by_space);
+  ls += sizeof (*l.int_curr_symbol);
+  ls += sizeof (l.int_frac_digits);
+  ls += sizeof (l.int_p_cs_precedes);
+  ls += sizeof (l.int_p_sign_posn);
+  ls += sizeof (l.int_p_sep_by_space);
+  ls += sizeof (l.int_n_cs_precedes);
+  ls += sizeof (l.int_n_sign_posn);
+  ls += sizeof (l.int_n_sep_by_space);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-localename.c b/src/gl/tests/test-localename.c
new file mode 100644
index 0000000..22790ab
--- /dev/null
+++ b/src/gl/tests/test-localename.c
@@ -0,0 +1,816 @@
+/* Test of gl_locale_name function and its variants.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "localename.h"
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+#if HAVE_WORKING_NEWLOCALE && HAVE_WORKING_USELOCALE && !HAVE_FAKE_LOCALES
+# define HAVE_GOOD_USELOCALE 1
+#endif
+
+
+#if HAVE_GOOD_USELOCALE
+
+static struct { int cat; int mask; const char *string; } const categories[] =
+  {
+      { LC_CTYPE,          LC_CTYPE_MASK,          "LC_CTYPE" },
+      { LC_NUMERIC,        LC_NUMERIC_MASK,        "LC_NUMERIC" },
+      { LC_TIME,           LC_TIME_MASK,           "LC_TIME" },
+      { LC_COLLATE,        LC_COLLATE_MASK,        "LC_COLLATE" },
+      { LC_MONETARY,       LC_MONETARY_MASK,       "LC_MONETARY" },
+      { LC_MESSAGES,       LC_MESSAGES_MASK,       "LC_MESSAGES" }
+# ifdef LC_PAPER
+    , { LC_PAPER,          LC_PAPER_MASK,          "LC_PAPER" }
+# endif
+# ifdef LC_NAME
+    , { LC_NAME,           LC_NAME_MASK,           "LC_NAME" }
+# endif
+# ifdef LC_ADDRESS
+    , { LC_ADDRESS,        LC_ADDRESS_MASK,        "LC_ADDRESS" }
+# endif
+# ifdef LC_TELEPHONE
+    , { LC_TELEPHONE,      LC_TELEPHONE_MASK,      "LC_TELEPHONE" }
+# endif
+# ifdef LC_MEASUREMENT
+    , { LC_MEASUREMENT,    LC_MEASUREMENT_MASK,    "LC_MEASUREMENT" }
+# endif
+# ifdef LC_IDENTIFICATION
+    , { LC_IDENTIFICATION, LC_IDENTIFICATION_MASK, "LC_IDENTIFICATION" }
+# endif
+  };
+
+#endif
+
+/* Test the gl_locale_name() function.  */
+static void
+test_locale_name (void)
+{
+  const char *ret;
+  const char *name;
+
+  /* Check that gl_locale_name returns non-NULL.  */
+  ASSERT (gl_locale_name (LC_MESSAGES, "LC_MESSAGES") != NULL);
+
+  /* Get into a defined state,  */
+  setlocale (LC_ALL, "en_US.UTF-8");
+#if HAVE_GOOD_USELOCALE
+  uselocale (LC_GLOBAL_LOCALE);
+#endif
+
+  /* Check that when all environment variables are unset,
+     gl_locale_name returns the default locale.  */
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LC_NUMERIC");
+  unsetenv ("LANG");
+  /* Need also to unset all environment variables that specify standard or
+     non-standard locale categories.  Otherwise, on glibc systems, when some
+     of these variables are set and reference a nonexistent locale, the
+     setlocale (LC_ALL, "") call below would fail.  */
+  unsetenv ("LC_COLLATE");
+  unsetenv ("LC_MONETARY");
+  unsetenv ("LC_TIME");
+  unsetenv ("LC_ADDRESS");
+  unsetenv ("LC_IDENTIFICATION");
+  unsetenv ("LC_MEASUREMENT");
+  unsetenv ("LC_NAME");
+  unsetenv ("LC_PAPER");
+  unsetenv ("LC_TELEPHONE");
+  ret = setlocale (LC_ALL, "");
+  ASSERT (ret != NULL);
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+  ASSERT (strcmp (gl_locale_name (LC_NUMERIC, "LC_NUMERIC"),
+                  gl_locale_name_default ()) == 0);
+
+  /* Check that an empty environment variable is treated like an unset
+     environment variable.  */
+
+  setenv ("LC_ALL", "", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "", 1);
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "", 1);
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "", 1);
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"),
+                  gl_locale_name_default ()) == 0);
+
+  /* Check that LC_ALL overrides the others, and LANG is overridden by the
+     others.  */
+
+  setenv ("LC_ALL", "C", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"), "C") == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "C", 1);
+  setenv ("LC_MESSAGES", "C", 1);
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"), "C") == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "C", 1);
+  setlocale (LC_ALL, "");
+  ASSERT (strcmp (gl_locale_name (LC_MESSAGES, "LC_MESSAGES"), "C") == 0);
+
+  /* Check mixed situations.  */
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  setenv ("LANG", "de_DE.UTF-8", 1);
+  if (setlocale (LC_ALL, "") != NULL)
+    {
+      name = gl_locale_name (LC_CTYPE, "LC_CTYPE");
+#if defined _WIN32 && !defined __CYGWIN__
+      /* On native Windows, here,
+           gl_locale_name_thread (LC_CTYPE, "LC_CTYPE")
+         returns NULL and
+           gl_locale_name_posix (LC_CTYPE, "LC_CTYPE")
+         returns either "de_DE" or "de_DE.UTF-8".  */
+      ASSERT (strcmp (name, "de_DE") == 0 || strcmp (name, "de_DE.UTF-8") == 0);
+#else
+      ASSERT (strcmp (name, "de_DE.UTF-8") == 0);
+#endif
+      name = gl_locale_name (LC_MESSAGES, "LC_MESSAGES");
+      ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+    }
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  unsetenv ("LANG");
+  if (setlocale (LC_ALL, "") != NULL)
+    {
+      name = gl_locale_name (LC_CTYPE, "LC_CTYPE");
+      ASSERT (strcmp (name, gl_locale_name_default ()) == 0);
+      name = gl_locale_name (LC_MESSAGES, "LC_MESSAGES");
+      ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+    }
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name considers the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        uselocale (locale);
+        name = gl_locale_name (LC_CTYPE, "LC_CTYPE");
+        ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+        name = gl_locale_name (LC_MESSAGES, "LC_MESSAGES");
+        ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+
+  /* Check that gl_locale_name distinguishes different categories of the
+     thread locale, and that the name is the right one for each.  */
+  {
+    unsigned int i;
+
+    for (i = 0; i < SIZEOF (categories); i++)
+      {
+        int category_mask = categories[i].mask;
+        locale_t loc = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+        if (loc != NULL)
+          {
+            locale_t locale = newlocale (category_mask, "de_DE.UTF-8", loc);
+            if (locale == NULL)
+              freelocale (loc);
+            else
+              {
+                unsigned int j;
+
+                uselocale (locale);
+                for (j = 0; j < SIZEOF (categories); j++)
+                  {
+                    const char *name_j =
+                      gl_locale_name (categories[j].cat, categories[j].string);
+                    if (j == i)
+                      ASSERT (strcmp (name_j, "de_DE.UTF-8") == 0);
+                    else
+                      ASSERT (strcmp (name_j, "fr_FR.UTF-8") == 0);
+                  }
+                uselocale (LC_GLOBAL_LOCALE);
+                freelocale (locale);
+              }
+          }
+      }
+  }
+#endif
+}
+
+/* Test the gl_locale_name_thread() function.  */
+static void
+test_locale_name_thread (void)
+{
+  /* Get into a defined state,  */
+  setlocale (LC_ALL, "en_US.UTF-8");
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name_thread returns NULL when no thread locale is
+     set.  */
+  uselocale (LC_GLOBAL_LOCALE);
+  ASSERT (gl_locale_name_thread (LC_CTYPE, "LC_CTYPE") == NULL);
+  ASSERT (gl_locale_name_thread (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  /* Check that gl_locale_name_thread considers the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        const char *name;
+
+        uselocale (locale);
+        name = gl_locale_name_thread (LC_CTYPE, "LC_CTYPE");
+        ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+        name = gl_locale_name_thread (LC_MESSAGES, "LC_MESSAGES");
+        ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+
+  /* Check that gl_locale_name_thread distinguishes different categories of the
+     thread locale, and that the name is the right one for each.  */
+  {
+    unsigned int i;
+
+    for (i = 0; i < SIZEOF (categories); i++)
+      {
+        int category_mask = categories[i].mask;
+        locale_t loc = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+        if (loc != NULL)
+          {
+            locale_t locale = newlocale (category_mask, "de_DE.UTF-8", loc);
+            if (locale == NULL)
+              freelocale (loc);
+            else
+              {
+                unsigned int j;
+
+                uselocale (locale);
+                for (j = 0; j < SIZEOF (categories); j++)
+                  {
+                    const char *name_j =
+                      gl_locale_name_thread (categories[j].cat,
+                                             categories[j].string);
+                    if (j == i)
+                      ASSERT (strcmp (name_j, "de_DE.UTF-8") == 0);
+                    else
+                      ASSERT (strcmp (name_j, "fr_FR.UTF-8") == 0);
+                  }
+                uselocale (LC_GLOBAL_LOCALE);
+                freelocale (locale);
+              }
+          }
+      }
+  }
+
+  /* Check that gl_locale_name_thread returns a string that is allocated with
+     indefinite extent.  */
+  {
+    /* Try many locale names in turn, in order to defeat possible caches.  */
+    static const char * const choices[] =
+      {
+        "C",
+        "POSIX",
+        "af_ZA",
+        "af_ZA.UTF-8",
+        "am_ET",
+        "am_ET.UTF-8",
+        "be_BY",
+        "be_BY.UTF-8",
+        "bg_BG",
+        "bg_BG.UTF-8",
+        "ca_ES",
+        "ca_ES.UTF-8",
+        "cs_CZ",
+        "cs_CZ.UTF-8",
+        "da_DK",
+        "da_DK.UTF-8",
+        "de_AT",
+        "de_AT.UTF-8",
+        "de_CH",
+        "de_CH.UTF-8",
+        "de_DE",
+        "de_DE.UTF-8",
+        "el_GR",
+        "el_GR.UTF-8",
+        "en_AU",
+        "en_AU.UTF-8",
+        "en_CA",
+        "en_CA.UTF-8",
+        "en_GB",
+        "en_GB.UTF-8",
+        "en_IE",
+        "en_IE.UTF-8",
+        "en_NZ",
+        "en_NZ.UTF-8",
+        "en_US",
+        "en_US.UTF-8",
+        "es_ES",
+        "es_ES.UTF-8",
+        "et_EE",
+        "et_EE.UTF-8",
+        "eu_ES",
+        "eu_ES.UTF-8",
+        "fi_FI",
+        "fi_FI.UTF-8",
+        "fr_BE",
+        "fr_BE.UTF-8",
+        "fr_CA",
+        "fr_CA.UTF-8",
+        "fr_CH",
+        "fr_CH.UTF-8",
+        "fr_FR",
+        "fr_FR.UTF-8",
+        "he_IL",
+        "he_IL.UTF-8",
+        "hr_HR",
+        "hr_HR.UTF-8",
+        "hu_HU",
+        "hu_HU.UTF-8",
+        "hy_AM",
+        "is_IS",
+        "is_IS.UTF-8",
+        "it_CH",
+        "it_CH.UTF-8",
+        "it_IT",
+        "it_IT.UTF-8",
+        "ja_JP.UTF-8",
+        "kk_KZ",
+        "kk_KZ.UTF-8",
+        "ko_KR.UTF-8",
+        "lt_LT",
+        "lt_LT.UTF-8",
+        "nl_BE",
+        "nl_BE.UTF-8",
+        "nl_NL",
+        "nl_NL.UTF-8",
+        "no_NO",
+        "no_NO.UTF-8",
+        "pl_PL",
+        "pl_PL.UTF-8",
+        "pt_BR",
+        "pt_BR.UTF-8",
+        "pt_PT",
+        "pt_PT.UTF-8",
+        "ro_RO",
+        "ro_RO.UTF-8",
+        "ru_RU",
+        "ru_RU.UTF-8",
+        "sk_SK",
+        "sk_SK.UTF-8",
+        "sl_SI",
+        "sl_SI.UTF-8",
+        "sv_SE",
+        "sv_SE.UTF-8",
+        "tr_TR",
+        "tr_TR.UTF-8",
+        "uk_UA",
+        "uk_UA.UTF-8",
+        "zh_CN",
+        "zh_CN.UTF-8",
+        "zh_HK",
+        "zh_HK.UTF-8",
+        "zh_TW",
+        "zh_TW.UTF-8"
+      };
+    /* Remember which locales are available.  */
+    unsigned char /* bool */ available[SIZEOF (choices)];
+    /* Array of remembered results of gl_locale_name_thread.  */
+    const char *unsaved_names[SIZEOF (choices)][SIZEOF (categories)];
+    /* Array of remembered results of gl_locale_name_thread, stored in safe
+       memory.  */
+    char *saved_names[SIZEOF (choices)][SIZEOF (categories)];
+    unsigned int j;
+
+    for (j = 0; j < SIZEOF (choices); j++)
+      {
+        locale_t locale = newlocale (LC_ALL_MASK, choices[j], NULL);
+        available[j] = (locale != NULL);
+        if (locale != NULL)
+          {
+            unsigned int i;
+
+            uselocale (locale);
+            for (i = 0; i < SIZEOF (categories); i++)
+              {
+                unsaved_names[j][i] = gl_locale_name_thread (categories[i].cat, categories[i].string);
+                saved_names[j][i] = strdup (unsaved_names[j][i]);
+              }
+            uselocale (LC_GLOBAL_LOCALE);
+            freelocale (locale);
+          }
+      }
+    /* Verify the unsaved_names are still valid.  */
+    for (j = 0; j < SIZEOF (choices); j++)
+      if (available[j])
+        {
+          unsigned int i;
+
+          for (i = 0; i < SIZEOF (categories); i++)
+            ASSERT (strcmp (unsaved_names[j][i], saved_names[j][i]) == 0);
+        }
+    /* Allocate many locales, without freeing them.  This is an attempt at
+       overwriting as much of the previously allocated memory as possible.  */
+    for (j = SIZEOF (choices); j > 0; )
+      {
+        j--;
+        if (available[j])
+          {
+            locale_t locale = newlocale (LC_ALL_MASK, choices[j], NULL);
+            unsigned int i;
+
+            ASSERT (locale != NULL);
+            uselocale (locale);
+            for (i = 0; i < SIZEOF (categories); i++)
+              {
+                const char *name = gl_locale_name_thread (categories[i].cat, categories[i].string);
+                ASSERT (strcmp (unsaved_names[j][i], name) == 0);
+              }
+            uselocale (LC_GLOBAL_LOCALE);
+            freelocale (locale);
+          }
+      }
+    /* Verify the unsaved_names are still valid.  */
+    for (j = 0; j < SIZEOF (choices); j++)
+      if (available[j])
+        {
+          unsigned int i;
+
+          for (i = 0; i < SIZEOF (categories); i++)
+            {
+              ASSERT (strcmp (unsaved_names[j][i], saved_names[j][i]) == 0);
+              free (saved_names[j][i]);
+            }
+        }
+  }
+#else
+  /* Check that gl_locale_name_thread always returns NULL.  */
+  ASSERT (gl_locale_name_thread (LC_CTYPE, "LC_CTYPE") == NULL);
+  ASSERT (gl_locale_name_thread (LC_MESSAGES, "LC_MESSAGES") == NULL);
+#endif
+}
+
+/* Test the gl_locale_name_posix() function.  */
+static void
+test_locale_name_posix (void)
+{
+  const char *ret;
+  const char *name;
+
+  /* Get into a defined state,  */
+  setlocale (LC_ALL, "en_US.UTF-8");
+#if HAVE_GOOD_USELOCALE
+  uselocale (LC_GLOBAL_LOCALE);
+#endif
+
+  /* Check that when all environment variables are unset,
+     gl_locale_name_posix returns either NULL or the default locale.  */
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LC_NUMERIC");
+  unsetenv ("LANG");
+  /* Need also to unset all environment variables that specify standard or
+     non-standard locale categories.  Otherwise, on glibc systems, when some
+     of these variables are set and reference a nonexistent locale, the
+     setlocale (LC_ALL, "") call below would fail.  */
+  unsetenv ("LC_COLLATE");
+  unsetenv ("LC_MONETARY");
+  unsetenv ("LC_TIME");
+  unsetenv ("LC_ADDRESS");
+  unsetenv ("LC_IDENTIFICATION");
+  unsetenv ("LC_MEASUREMENT");
+  unsetenv ("LC_NAME");
+  unsetenv ("LC_PAPER");
+  unsetenv ("LC_TELEPHONE");
+  ret = setlocale (LC_ALL, "");
+  ASSERT (ret != NULL);
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+  name = gl_locale_name_posix (LC_NUMERIC, "LC_NUMERIC");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  /* Check that an empty environment variable is treated like an unset
+     environment variable.  */
+
+  setenv ("LC_ALL", "", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "", 1);
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "", 1);
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "", 1);
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+
+  /* Check that LC_ALL overrides the others, and LANG is overridden by the
+     others.  */
+
+  setenv ("LC_ALL", "C", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "C", 1);
+  setenv ("LC_MESSAGES", "C", 1);
+  unsetenv ("LANG");
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "C", 1);
+  setlocale (LC_ALL, "");
+  name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  /* Check mixed situations.  */
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  setenv ("LANG", "de_DE.UTF-8", 1);
+  if (setlocale (LC_ALL, "") != NULL)
+    {
+      name = gl_locale_name_posix (LC_CTYPE, "LC_CTYPE");
+#if defined _WIN32 && !defined __CYGWIN__
+      ASSERT (strcmp (name, "de_DE") == 0 || strcmp (name, "de_DE.UTF-8") == 0);
+#else
+      ASSERT (strcmp (name, "de_DE.UTF-8") == 0);
+#endif
+      name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+      ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+    }
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  unsetenv ("LANG");
+  if (setlocale (LC_ALL, "") != NULL)
+    {
+      name = gl_locale_name_posix (LC_CTYPE, "LC_CTYPE");
+      ASSERT (name == NULL || strcmp (name, gl_locale_name_default ()) == 0);
+      name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+      ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+    }
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name_posix ignores the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        unsetenv ("LC_ALL");
+        unsetenv ("LC_CTYPE");
+        unsetenv ("LC_MESSAGES");
+        setenv ("LANG", "C", 1);
+        setlocale (LC_ALL, "");
+        uselocale (locale);
+        name = gl_locale_name_posix (LC_MESSAGES, "LC_MESSAGES");
+        ASSERT (strcmp (name, "C") == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+#endif
+}
+
+/* Test the gl_locale_name_environ() function.  */
+static void
+test_locale_name_environ (void)
+{
+  const char *name;
+
+  /* Get into a defined state,  */
+  setlocale (LC_ALL, "en_US.UTF-8");
+#if HAVE_GOOD_USELOCALE
+  uselocale (LC_GLOBAL_LOCALE);
+#endif
+
+  /* Check that when all environment variables are unset,
+     gl_locale_name_environ returns NULL.  */
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LC_NUMERIC");
+  unsetenv ("LANG");
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+  ASSERT (gl_locale_name_environ (LC_NUMERIC, "LC_NUMERIC") == NULL);
+
+  /* Check that an empty environment variable is treated like an unset
+     environment variable.  */
+
+  setenv ("LC_ALL", "", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "", 1);
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "", 1);
+  unsetenv ("LANG");
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "", 1);
+  ASSERT (gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES") == NULL);
+
+  /* Check that LC_ALL overrides the others, and LANG is overridden by the
+     others.  */
+
+  setenv ("LC_ALL", "C", 1);
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  unsetenv ("LANG");
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  unsetenv ("LC_ALL");
+  setenv ("LC_CTYPE", "C", 1);
+  setenv ("LC_MESSAGES", "C", 1);
+  unsetenv ("LANG");
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  unsetenv ("LC_MESSAGES");
+  setenv ("LANG", "C", 1);
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "C") == 0);
+
+  /* Check mixed situations.  */
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  setenv ("LANG", "de_DE.UTF-8", 1);
+  name = gl_locale_name_environ (LC_CTYPE, "LC_CTYPE");
+  ASSERT (strcmp (name, "de_DE.UTF-8") == 0);
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+
+  unsetenv ("LC_ALL");
+  unsetenv ("LC_CTYPE");
+  setenv ("LC_MESSAGES", "fr_FR.UTF-8", 1);
+  unsetenv ("LANG");
+  name = gl_locale_name_environ (LC_CTYPE, "LC_CTYPE");
+  ASSERT (name == NULL);
+  name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+  ASSERT (strcmp (name, "fr_FR.UTF-8") == 0);
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name_environ ignores the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        unsetenv ("LC_ALL");
+        unsetenv ("LC_CTYPE");
+        unsetenv ("LC_MESSAGES");
+        setenv ("LANG", "C", 1);
+        setlocale (LC_ALL, "");
+        uselocale (locale);
+        name = gl_locale_name_environ (LC_MESSAGES, "LC_MESSAGES");
+        ASSERT (strcmp (name, "C") == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+#endif
+}
+
+/* Test the gl_locale_name_default() function.  */
+static void
+test_locale_name_default (void)
+{
+  const char *name = gl_locale_name_default ();
+
+  ASSERT (name != NULL);
+
+  /* Only Mac OS X and Windows have a facility for the user to set the default
+     locale.  */
+#if !((defined __APPLE__ && defined __MACH__) || (defined _WIN32 || defined __CYGWIN__))
+  ASSERT (strcmp (name, "C") == 0);
+#endif
+
+#if HAVE_GOOD_USELOCALE
+  /* Check that gl_locale_name_default ignores the thread locale.  */
+  {
+    locale_t locale = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", NULL);
+    if (locale != NULL)
+      {
+        uselocale (locale);
+        ASSERT (strcmp (gl_locale_name_default (), name) == 0);
+        uselocale (LC_GLOBAL_LOCALE);
+        freelocale (locale);
+      }
+  }
+#endif
+}
+
+int
+main ()
+{
+  test_locale_name ();
+  test_locale_name_thread ();
+  test_locale_name_posix ();
+  test_locale_name_environ ();
+  test_locale_name_default ();
+
+  return 0;
+}
diff --git a/src/gl/tests/test-lock.c b/src/gl/tests/test-lock.c
new file mode 100644
index 0000000..4d67469
--- /dev/null
+++ b/src/gl/tests/test-lock.c
@@ -0,0 +1,618 @@
+/* Test of locking in multithreaded situations.
+   Copyright (C) 2005, 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+
+#if USE_ISOC_THREADS
+# define TEST_ISOC_THREADS 1
+#endif
+#if USE_POSIX_THREADS
+# define TEST_POSIX_THREADS 1
+#endif
+#if USE_ISOC_AND_POSIX_THREADS
+# define TEST_ISOC_AND_POSIX_THREADS 1
+#endif
+#if USE_WINDOWS_THREADS
+# define TEST_WINDOWS_THREADS 1
+#endif
+
+/* Whether to enable locking.
+   Uncomment this to get a test program without locking, to verify that
+   it crashes.  */
+#define ENABLE_LOCKING 1
+
+/* Which tests to perform.
+   Uncomment some of these, to verify that all tests crash if no locking
+   is enabled.  */
+#define DO_TEST_LOCK 1
+#define DO_TEST_RWLOCK 1
+#define DO_TEST_RECURSIVE_LOCK 1
+#define DO_TEST_ONCE 1
+
+/* Whether to help the scheduler through explicit yield().
+   Uncomment this to see if the operating system has a fair scheduler.  */
+#define EXPLICIT_YIELD 1
+
+/* Whether to print debugging messages.  */
+#define ENABLE_DEBUGGING 0
+
+/* Number of simultaneous threads.  */
+#define THREAD_COUNT 10
+
+/* Number of operations performed in each thread.
+   This is quite high, because with a smaller count, say 5000, we often get
+   an "OK" result even without ENABLE_LOCKING (on Linux/x86).  */
+#define REPEAT_COUNT 50000
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if !ENABLE_LOCKING
+# undef USE_ISOC_THREADS
+# undef USE_POSIX_THREADS
+# undef USE_ISOC_AND_POSIX_THREADS
+# undef USE_WINDOWS_THREADS
+#endif
+#include "glthread/lock.h"
+
+#if !ENABLE_LOCKING
+# if TEST_ISOC_THREADS
+#  define USE_ISOC_THREADS 1
+# endif
+# if TEST_POSIX_THREADS
+#  define USE_POSIX_THREADS 1
+# endif
+# if TEST_ISOC_AND_POSIX_THREADS
+#  define USE_ISOC_AND_POSIX_THREADS 1
+# endif
+# if TEST_WINDOWS_THREADS
+#  define USE_WINDOWS_THREADS 1
+# endif
+#endif
+
+#include "glthread/thread.h"
+#include "glthread/yield.h"
+
+#if HAVE_DECL_ALARM
+# include <signal.h>
+# include <unistd.h>
+#endif
+
+#include "atomic-int-gnulib.h"
+
+#if ENABLE_DEBUGGING
+# define dbgprintf printf
+#else
+# define dbgprintf if (0) printf
+#endif
+
+#if EXPLICIT_YIELD
+# define yield() gl_thread_yield ()
+#else
+# define yield()
+#endif
+
+#define ACCOUNT_COUNT 4
+
+static int account[ACCOUNT_COUNT];
+
+static int
+random_account (void)
+{
+  return ((unsigned int) rand () >> 3) % ACCOUNT_COUNT;
+}
+
+static void
+check_accounts (void)
+{
+  int i, sum;
+
+  sum = 0;
+  for (i = 0; i < ACCOUNT_COUNT; i++)
+    sum += account[i];
+  if (sum != ACCOUNT_COUNT * 1000)
+    abort ();
+}
+
+
+/* ------------------- Test normal (non-recursive) locks ------------------- */
+
+/* Test normal locks by having several bank accounts and several threads
+   which shuffle around money between the accounts and another thread
+   checking that all the money is still there.  */
+
+gl_lock_define_initialized(static, my_lock)
+
+static void *
+lock_mutator_thread (void *arg)
+{
+  int repeat;
+
+  for (repeat = REPEAT_COUNT; repeat > 0; repeat--)
+    {
+      int i1, i2, value;
+
+      dbgprintf ("Mutator %p before lock\n", gl_thread_self_pointer ());
+      gl_lock_lock (my_lock);
+      dbgprintf ("Mutator %p after  lock\n", gl_thread_self_pointer ());
+
+      i1 = random_account ();
+      i2 = random_account ();
+      value = ((unsigned int) rand () >> 3) % 10;
+      account[i1] += value;
+      account[i2] -= value;
+
+      dbgprintf ("Mutator %p before unlock\n", gl_thread_self_pointer ());
+      gl_lock_unlock (my_lock);
+      dbgprintf ("Mutator %p after  unlock\n", gl_thread_self_pointer ());
+
+      dbgprintf ("Mutator %p before check lock\n", gl_thread_self_pointer ());
+      gl_lock_lock (my_lock);
+      check_accounts ();
+      gl_lock_unlock (my_lock);
+      dbgprintf ("Mutator %p after  check unlock\n", gl_thread_self_pointer ());
+
+      yield ();
+    }
+
+  dbgprintf ("Mutator %p dying.\n", gl_thread_self_pointer ());
+  return NULL;
+}
+
+static struct atomic_int lock_checker_done;
+
+static void *
+lock_checker_thread (void *arg)
+{
+  while (get_atomic_int_value (&lock_checker_done) == 0)
+    {
+      dbgprintf ("Checker %p before check lock\n", gl_thread_self_pointer ());
+      gl_lock_lock (my_lock);
+      check_accounts ();
+      gl_lock_unlock (my_lock);
+      dbgprintf ("Checker %p after  check unlock\n", gl_thread_self_pointer ());
+
+      yield ();
+    }
+
+  dbgprintf ("Checker %p dying.\n", gl_thread_self_pointer ());
+  return NULL;
+}
+
+static void
+test_lock (void)
+{
+  int i;
+  gl_thread_t checkerthread;
+  gl_thread_t threads[THREAD_COUNT];
+
+  /* Initialization.  */
+  for (i = 0; i < ACCOUNT_COUNT; i++)
+    account[i] = 1000;
+  init_atomic_int (&lock_checker_done);
+  set_atomic_int_value (&lock_checker_done, 0);
+
+  /* Spawn the threads.  */
+  checkerthread = gl_thread_create (lock_checker_thread, NULL);
+  for (i = 0; i < THREAD_COUNT; i++)
+    threads[i] = gl_thread_create (lock_mutator_thread, NULL);
+
+  /* Wait for the threads to terminate.  */
+  for (i = 0; i < THREAD_COUNT; i++)
+    gl_thread_join (threads[i], NULL);
+  set_atomic_int_value (&lock_checker_done, 1);
+  gl_thread_join (checkerthread, NULL);
+  check_accounts ();
+}
+
+
+/* ----------------- Test read-write (non-recursive) locks ----------------- */
+
+/* Test read-write locks by having several bank accounts and several threads
+   which shuffle around money between the accounts and several other threads
+   that check that all the money is still there.  */
+
+gl_rwlock_define_initialized(static, my_rwlock)
+
+static void *
+rwlock_mutator_thread (void *arg)
+{
+  int repeat;
+
+  for (repeat = REPEAT_COUNT; repeat > 0; repeat--)
+    {
+      int i1, i2, value;
+
+      dbgprintf ("Mutator %p before wrlock\n", gl_thread_self_pointer ());
+      gl_rwlock_wrlock (my_rwlock);
+      dbgprintf ("Mutator %p after  wrlock\n", gl_thread_self_pointer ());
+
+      i1 = random_account ();
+      i2 = random_account ();
+      value = ((unsigned int) rand () >> 3) % 10;
+      account[i1] += value;
+      account[i2] -= value;
+
+      dbgprintf ("Mutator %p before unlock\n", gl_thread_self_pointer ());
+      gl_rwlock_unlock (my_rwlock);
+      dbgprintf ("Mutator %p after  unlock\n", gl_thread_self_pointer ());
+
+      yield ();
+    }
+
+  dbgprintf ("Mutator %p dying.\n", gl_thread_self_pointer ());
+  return NULL;
+}
+
+static struct atomic_int rwlock_checker_done;
+
+static void *
+rwlock_checker_thread (void *arg)
+{
+  while (get_atomic_int_value (&rwlock_checker_done) == 0)
+    {
+      dbgprintf ("Checker %p before check rdlock\n", gl_thread_self_pointer ());
+      gl_rwlock_rdlock (my_rwlock);
+      check_accounts ();
+      gl_rwlock_unlock (my_rwlock);
+      dbgprintf ("Checker %p after  check unlock\n", gl_thread_self_pointer ());
+
+      yield ();
+    }
+
+  dbgprintf ("Checker %p dying.\n", gl_thread_self_pointer ());
+  return NULL;
+}
+
+static void
+test_rwlock (void)
+{
+  int i;
+  gl_thread_t checkerthreads[THREAD_COUNT];
+  gl_thread_t threads[THREAD_COUNT];
+
+  /* Initialization.  */
+  for (i = 0; i < ACCOUNT_COUNT; i++)
+    account[i] = 1000;
+  init_atomic_int (&rwlock_checker_done);
+  set_atomic_int_value (&rwlock_checker_done, 0);
+
+  /* Spawn the threads.  */
+  for (i = 0; i < THREAD_COUNT; i++)
+    checkerthreads[i] = gl_thread_create (rwlock_checker_thread, NULL);
+  for (i = 0; i < THREAD_COUNT; i++)
+    threads[i] = gl_thread_create (rwlock_mutator_thread, NULL);
+
+  /* Wait for the threads to terminate.  */
+  for (i = 0; i < THREAD_COUNT; i++)
+    gl_thread_join (threads[i], NULL);
+  set_atomic_int_value (&rwlock_checker_done, 1);
+  for (i = 0; i < THREAD_COUNT; i++)
+    gl_thread_join (checkerthreads[i], NULL);
+  check_accounts ();
+}
+
+
+/* -------------------------- Test recursive locks -------------------------- */
+
+/* Test recursive locks by having several bank accounts and several threads
+   which shuffle around money between the accounts (recursively) and another
+   thread checking that all the money is still there.  */
+
+gl_recursive_lock_define_initialized(static, my_reclock)
+
+static void
+recshuffle (void)
+{
+  int i1, i2, value;
+
+  dbgprintf ("Mutator %p before lock\n", gl_thread_self_pointer ());
+  gl_recursive_lock_lock (my_reclock);
+  dbgprintf ("Mutator %p after  lock\n", gl_thread_self_pointer ());
+
+  i1 = random_account ();
+  i2 = random_account ();
+  value = ((unsigned int) rand () >> 3) % 10;
+  account[i1] += value;
+  account[i2] -= value;
+
+  /* Recursive with probability 0.5.  */
+  if (((unsigned int) rand () >> 3) % 2)
+    recshuffle ();
+
+  dbgprintf ("Mutator %p before unlock\n", gl_thread_self_pointer ());
+  gl_recursive_lock_unlock (my_reclock);
+  dbgprintf ("Mutator %p after  unlock\n", gl_thread_self_pointer ());
+}
+
+static void *
+reclock_mutator_thread (void *arg)
+{
+  int repeat;
+
+  for (repeat = REPEAT_COUNT; repeat > 0; repeat--)
+    {
+      recshuffle ();
+
+      dbgprintf ("Mutator %p before check lock\n", gl_thread_self_pointer ());
+      gl_recursive_lock_lock (my_reclock);
+      check_accounts ();
+      gl_recursive_lock_unlock (my_reclock);
+      dbgprintf ("Mutator %p after  check unlock\n", gl_thread_self_pointer ());
+
+      yield ();
+    }
+
+  dbgprintf ("Mutator %p dying.\n", gl_thread_self_pointer ());
+  return NULL;
+}
+
+static struct atomic_int reclock_checker_done;
+
+static void *
+reclock_checker_thread (void *arg)
+{
+  while (get_atomic_int_value (&reclock_checker_done) == 0)
+    {
+      dbgprintf ("Checker %p before check lock\n", gl_thread_self_pointer ());
+      gl_recursive_lock_lock (my_reclock);
+      check_accounts ();
+      gl_recursive_lock_unlock (my_reclock);
+      dbgprintf ("Checker %p after  check unlock\n", gl_thread_self_pointer ());
+
+      yield ();
+    }
+
+  dbgprintf ("Checker %p dying.\n", gl_thread_self_pointer ());
+  return NULL;
+}
+
+static void
+test_recursive_lock (void)
+{
+  int i;
+  gl_thread_t checkerthread;
+  gl_thread_t threads[THREAD_COUNT];
+
+  /* Initialization.  */
+  for (i = 0; i < ACCOUNT_COUNT; i++)
+    account[i] = 1000;
+  init_atomic_int (&reclock_checker_done);
+  set_atomic_int_value (&reclock_checker_done, 0);
+
+  /* Spawn the threads.  */
+  checkerthread = gl_thread_create (reclock_checker_thread, NULL);
+  for (i = 0; i < THREAD_COUNT; i++)
+    threads[i] = gl_thread_create (reclock_mutator_thread, NULL);
+
+  /* Wait for the threads to terminate.  */
+  for (i = 0; i < THREAD_COUNT; i++)
+    gl_thread_join (threads[i], NULL);
+  set_atomic_int_value (&reclock_checker_done, 1);
+  gl_thread_join (checkerthread, NULL);
+  check_accounts ();
+}
+
+
+/* ------------------------ Test once-only execution ------------------------ */
+
+/* Test once-only execution by having several threads attempt to grab a
+   once-only task simultaneously (triggered by releasing a read-write lock).  */
+
+gl_once_define(static, fresh_once)
+static int ready[THREAD_COUNT];
+static gl_lock_t ready_lock[THREAD_COUNT];
+#if ENABLE_LOCKING
+static gl_rwlock_t fire_signal[REPEAT_COUNT];
+#else
+static volatile int fire_signal_state;
+#endif
+static gl_once_t once_control;
+static int performed;
+gl_lock_define_initialized(static, performed_lock)
+
+static void
+once_execute (void)
+{
+  gl_lock_lock (performed_lock);
+  performed++;
+  gl_lock_unlock (performed_lock);
+}
+
+static void *
+once_contender_thread (void *arg)
+{
+  int id = (int) (intptr_t) arg;
+  int repeat;
+
+  for (repeat = 0; repeat <= REPEAT_COUNT; repeat++)
+    {
+      /* Tell the main thread that we're ready.  */
+      gl_lock_lock (ready_lock[id]);
+      ready[id] = 1;
+      gl_lock_unlock (ready_lock[id]);
+
+      if (repeat == REPEAT_COUNT)
+        break;
+
+      dbgprintf ("Contender %p waiting for signal for round %d\n",
+                 gl_thread_self_pointer (), repeat);
+#if ENABLE_LOCKING
+      /* Wait for the signal to go.  */
+      gl_rwlock_rdlock (fire_signal[repeat]);
+      /* And don't hinder the others (if the scheduler is unfair).  */
+      gl_rwlock_unlock (fire_signal[repeat]);
+#else
+      /* Wait for the signal to go.  */
+      while (fire_signal_state <= repeat)
+        yield ();
+#endif
+      dbgprintf ("Contender %p got the     signal for round %d\n",
+                 gl_thread_self_pointer (), repeat);
+
+      /* Contend for execution.  */
+      gl_once (once_control, once_execute);
+    }
+
+  return NULL;
+}
+
+static void
+test_once (void)
+{
+  int i, repeat;
+  gl_thread_t threads[THREAD_COUNT];
+
+  /* Initialize all variables.  */
+  for (i = 0; i < THREAD_COUNT; i++)
+    {
+      ready[i] = 0;
+      gl_lock_init (ready_lock[i]);
+    }
+#if ENABLE_LOCKING
+  for (i = 0; i < REPEAT_COUNT; i++)
+    gl_rwlock_init (fire_signal[i]);
+#else
+  fire_signal_state = 0;
+#endif
+
+#if ENABLE_LOCKING
+  /* Block all fire_signals.  */
+  for (i = REPEAT_COUNT-1; i >= 0; i--)
+    gl_rwlock_wrlock (fire_signal[i]);
+#endif
+
+  /* Spawn the threads.  */
+  for (i = 0; i < THREAD_COUNT; i++)
+    threads[i] =
+      gl_thread_create (once_contender_thread, (void *) (intptr_t) i);
+
+  for (repeat = 0; repeat <= REPEAT_COUNT; repeat++)
+    {
+      /* Wait until every thread is ready.  */
+      dbgprintf ("Main thread before synchronizing for round %d\n", repeat);
+      for (;;)
+        {
+          int ready_count = 0;
+          for (i = 0; i < THREAD_COUNT; i++)
+            {
+              gl_lock_lock (ready_lock[i]);
+              ready_count += ready[i];
+              gl_lock_unlock (ready_lock[i]);
+            }
+          if (ready_count == THREAD_COUNT)
+            break;
+          yield ();
+        }
+      dbgprintf ("Main thread after  synchronizing for round %d\n", repeat);
+
+      if (repeat > 0)
+        {
+          /* Check that exactly one thread executed the once_execute()
+             function.  */
+          if (performed != 1)
+            abort ();
+        }
+
+      if (repeat == REPEAT_COUNT)
+        break;
+
+      /* Preparation for the next round: Initialize once_control.  */
+      memcpy (&once_control, &fresh_once, sizeof (gl_once_t));
+
+      /* Preparation for the next round: Reset the performed counter.  */
+      performed = 0;
+
+      /* Preparation for the next round: Reset the ready flags.  */
+      for (i = 0; i < THREAD_COUNT; i++)
+        {
+          gl_lock_lock (ready_lock[i]);
+          ready[i] = 0;
+          gl_lock_unlock (ready_lock[i]);
+        }
+
+      /* Signal all threads simultaneously.  */
+      dbgprintf ("Main thread giving signal for round %d\n", repeat);
+#if ENABLE_LOCKING
+      gl_rwlock_unlock (fire_signal[repeat]);
+#else
+      fire_signal_state = repeat + 1;
+#endif
+    }
+
+  /* Wait for the threads to terminate.  */
+  for (i = 0; i < THREAD_COUNT; i++)
+    gl_thread_join (threads[i], NULL);
+}
+
+
+/* -------------------------------------------------------------------------- */
+
+int
+main ()
+{
+#if HAVE_DECL_ALARM
+  /* Declare failure if test takes too long, by using default abort
+     caused by SIGALRM.  */
+  int alarm_value = 600;
+  signal (SIGALRM, SIG_DFL);
+  alarm (alarm_value);
+#endif
+
+#if DO_TEST_LOCK
+  printf ("Starting test_lock ..."); fflush (stdout);
+  test_lock ();
+  printf (" OK\n"); fflush (stdout);
+#endif
+#if DO_TEST_RWLOCK
+  printf ("Starting test_rwlock ..."); fflush (stdout);
+  test_rwlock ();
+  printf (" OK\n"); fflush (stdout);
+#endif
+#if DO_TEST_RECURSIVE_LOCK
+  printf ("Starting test_recursive_lock ..."); fflush (stdout);
+  test_recursive_lock ();
+  printf (" OK\n"); fflush (stdout);
+#endif
+#if DO_TEST_ONCE
+  printf ("Starting test_once ..."); fflush (stdout);
+  test_once ();
+  printf (" OK\n"); fflush (stdout);
+#endif
+
+  return 0;
+}
+
+#else
+
+/* No multithreading available.  */
+
+#include <stdio.h>
+
+int
+main ()
+{
+  fputs ("Skipping test: multithreading not enabled\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/gl/tests/test-lseek.c b/src/gl/tests/test-lseek.c
new file mode 100644
index 0000000..9f531d8
--- /dev/null
+++ b/src/gl/tests/test-lseek.c
@@ -0,0 +1,109 @@
+/* Test of lseek() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake, 2007.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (lseek, off_t, (int, off_t, int));
+
+#include <errno.h>
+
+#include "macros.h"
+
+/* ARGC must be 2; *ARGV[1] is '0' if stdin and stdout are files, '1'
+   if they are pipes, and '2' if they are closed.  Check for proper
+   semantics of lseek.  */
+int
+main (int argc, char **argv)
+{
+  if (argc != 2)
+    return 2;
+  switch (*argv[1])
+    {
+    case '0': /* regular files */
+      ASSERT (lseek (0, (off_t)2, SEEK_SET) == 2);
+      ASSERT (lseek (0, (off_t)-4, SEEK_CUR) == -1);
+      ASSERT (errno == EINVAL);
+      errno = 0;
+#if ! defined __BEOS__
+      /* POSIX says that the last lseek call, when failing, does not change
+         the current offset.  But BeOS sets it to 0.  */
+      ASSERT (lseek (0, (off_t)0, SEEK_CUR) == 2);
+#endif
+#if 0 /* leads to SIGSYS on IRIX 6.5 */
+      ASSERT (lseek (0, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
+      ASSERT (errno == EINVAL);
+#endif
+      ASSERT (lseek (1, (off_t)2, SEEK_SET) == 2);
+      errno = 0;
+      ASSERT (lseek (1, (off_t)-4, SEEK_CUR) == -1);
+      ASSERT (errno == EINVAL);
+      errno = 0;
+#if ! defined __BEOS__
+      /* POSIX says that the last lseek call, when failing, does not change
+         the current offset.  But BeOS sets it to 0.  */
+      ASSERT (lseek (1, (off_t)0, SEEK_CUR) == 2);
+#endif
+#if 0 /* leads to SIGSYS on IRIX 6.5 */
+      ASSERT (lseek (1, (off_t)0, (SEEK_SET | SEEK_CUR | SEEK_END) + 1) == -1);
+      ASSERT (errno == EINVAL);
+#endif
+      break;
+
+    case '1': /* pipes */
+      errno = 0;
+      ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == ESPIPE);
+      errno = 0;
+      ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == ESPIPE);
+      break;
+
+    case '2': /* closed */
+      /* Explicitly close file descriptors 0 and 1.  The <&- and >&- in the
+         invoking shell are not enough on HP-UX.  */
+      close (0);
+      close (1);
+
+      errno = 0;
+      ASSERT (lseek (0, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == EBADF);
+
+      errno = 0;
+      ASSERT (lseek (1, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == EBADF);
+
+      /* Test behaviour for invalid file descriptors.  */
+      errno = 0;
+      ASSERT (lseek (-1, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == EBADF);
+
+      close (99);
+      errno = 0;
+      ASSERT (lseek (99, (off_t)0, SEEK_CUR) == -1);
+      ASSERT (errno == EBADF);
+
+      break;
+
+    default:
+      return 1;
+    }
+  return 0;
+}
diff --git a/src/gl/tests/test-lseek.sh b/src/gl/tests/test-lseek.sh
new file mode 100755
index 0000000..ff206c6
--- /dev/null
+++ b/src/gl/tests/test-lseek.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+tmpfiles=
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles=t-lseek.tmp
+# seekable files
+${CHECKER} ./test-lseek${EXEEXT} 0 < "$srcdir/test-lseek.sh" > t-lseek.tmp || exit 1
+
+# pipes
+echo hi | { ${CHECKER} ./test-lseek${EXEEXT} 1; echo $? > t-lseek.tmp; cat > /dev/null; } | cat
+test "`cat t-lseek.tmp`" = "0" || exit 1
+
+# closed descriptors
+${CHECKER} ./test-lseek${EXEEXT} 2 <&- >&- || exit 1
+
+rm -rf $tmpfiles
+exit 0
diff --git a/src/gl/tests/test-lstat.c b/src/gl/tests/test-lstat.c
new file mode 100644
index 0000000..b8481fb
--- /dev/null
+++ b/src/gl/tests/test-lstat.c
@@ -0,0 +1,60 @@
+/* Test of lstat() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson, 2008; and Eric Blake, 2009.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+/* Caution: lstat may be a function-like macro.  Although this
+   signature check must pass, it may be the signature of the real (and
+   broken) lstat rather than rpl_lstat.  Most code should not use the
+   address of lstat.  */
+#include "signature.h"
+SIGNATURE_CHECK (lstat, int, (char const *, struct stat *));
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "same-inode.h"
+#include "ignore-value.h"
+#include "macros.h"
+
+#define BASE "test-lstat.t"
+
+#include "test-lstat.h"
+
+/* Wrapper around lstat, which works even if lstat is a function-like
+   macro, where test_lstat_func(lstat) would do the wrong thing.  */
+static int
+do_lstat (char const *name, struct stat *st)
+{
+  return lstat (name, st);
+}
+
+int
+main (void)
+{
+  /* Remove any leftovers from a previous partial run.  */
+  ignore_value (system ("rm -rf " BASE "*"));
+
+  return test_lstat_func (do_lstat, true);
+}
diff --git a/src/gl/tests/test-lstat.h b/src/gl/tests/test-lstat.h
new file mode 100644
index 0000000..08803da
--- /dev/null
+++ b/src/gl/tests/test-lstat.h
@@ -0,0 +1,122 @@
+/* Test of lstat() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson, 2008; and Eric Blake, 2009.  */
+
+/* This file is designed to test both lstat(n,buf) and
+   fstatat(AT_FDCWD,n,buf,AT_SYMLINK_NOFOLLOW).  FUNC is the function
+   to test.  Assumes that BASE and ASSERT are already defined, and
+   that appropriate headers are already included.  If PRINT, warn
+   before skipping symlink tests with status 77.  */
+
+static int
+test_lstat_func (int (*func) (char const *, struct stat *), bool print)
+{
+  struct stat st1;
+  struct stat st2;
+
+  /* Test for common directories.  */
+  ASSERT (func (".", &st1) == 0);
+  ASSERT (func ("./", &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+  ASSERT (S_ISDIR (st1.st_mode));
+  ASSERT (S_ISDIR (st2.st_mode));
+  ASSERT (func ("/", &st1) == 0);
+  ASSERT (func ("///", &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+  ASSERT (S_ISDIR (st1.st_mode));
+  ASSERT (S_ISDIR (st2.st_mode));
+  ASSERT (func ("..", &st1) == 0);
+  ASSERT (S_ISDIR (st1.st_mode));
+
+  /* Test for error conditions.  */
+  errno = 0;
+  ASSERT (func ("", &st1) == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nosuch", &st1) == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nosuch/", &st1) == -1);
+  ASSERT (errno == ENOENT);
+
+  ASSERT (close (creat (BASE "file", 0600)) == 0);
+  ASSERT (func (BASE "file", &st1) == 0);
+  ASSERT (S_ISREG (st1.st_mode));
+  errno = 0;
+  ASSERT (func (BASE "file/", &st1) == -1);
+  ASSERT (errno == ENOTDIR);
+
+  /* Now for some symlink tests, where supported.  We set up:
+     link1 -> directory
+     link2 -> file
+     link3 -> dangling
+     link4 -> loop
+     then test behavior both with and without trailing slash.
+  */
+  if (symlink (".", BASE "link1") != 0)
+    {
+      ASSERT (unlink (BASE "file") == 0);
+      if (print)
+        fputs ("skipping test: symlinks not supported on this file system\n",
+               stderr);
+      return 77;
+    }
+  ASSERT (symlink (BASE "file", BASE "link2") == 0);
+  ASSERT (symlink (BASE "nosuch", BASE "link3") == 0);
+  ASSERT (symlink (BASE "link4", BASE "link4") == 0);
+
+  ASSERT (func (BASE "link1", &st1) == 0);
+  ASSERT (S_ISLNK (st1.st_mode));
+  ASSERT (func (BASE "link1/", &st1) == 0);
+  ASSERT (stat (BASE "link1", &st2) == 0);
+  ASSERT (S_ISDIR (st1.st_mode));
+  ASSERT (S_ISDIR (st2.st_mode));
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+
+  ASSERT (func (BASE "link2", &st1) == 0);
+  ASSERT (S_ISLNK (st1.st_mode));
+  errno = 0;
+  ASSERT (func (BASE "link2/", &st1) == -1);
+  ASSERT (errno == ENOTDIR);
+
+  ASSERT (func (BASE "link3", &st1) == 0);
+  ASSERT (S_ISLNK (st1.st_mode));
+  errno = 0;
+  ASSERT (func (BASE "link3/", &st1) == -1);
+  ASSERT (errno == ENOENT);
+
+  ASSERT (func (BASE "link4", &st1) == 0);
+  ASSERT (S_ISLNK (st1.st_mode));
+  errno = 0;
+  ASSERT (func (BASE "link4/", &st1) == -1);
+  ASSERT (errno == ELOOP);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "link1") == 0);
+  ASSERT (unlink (BASE "link2") == 0);
+  ASSERT (unlink (BASE "link3") == 0);
+  ASSERT (unlink (BASE "link4") == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-malloc-gnu.c b/src/gl/tests/test-malloc-gnu.c
new file mode 100644
index 0000000..0160c6c
--- /dev/null
+++ b/src/gl/tests/test-malloc-gnu.c
@@ -0,0 +1,45 @@
+/* Test of malloc function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <stdint.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  /* Check that malloc (0) is not a NULL pointer.  */
+  void *volatile p = malloc (0);
+  ASSERT (p != NULL);
+  free (p);
+
+  /* Check that malloc (n) fails when n exceeds PTRDIFF_MAX.  */
+  if (PTRDIFF_MAX < SIZE_MAX)
+    {
+      size_t one = argc != 12345;
+      p = malloc (PTRDIFF_MAX + one);
+      ASSERT (p == NULL);
+      ASSERT (errno == ENOMEM);
+    }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-malloca.c b/src/gl/tests/test-malloca.c
new file mode 100644
index 0000000..52d95a5
--- /dev/null
+++ b/src/gl/tests/test-malloca.c
@@ -0,0 +1,62 @@
+/* Test of safe automatic memory allocation.
+   Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+#include "malloca.h"
+
+#include <stdlib.h>
+
+static void
+do_allocation (int n)
+{
+  void *volatile ptr = malloca (n);
+  freea (ptr);
+  safe_alloca (n);
+}
+
+void (*func) (int) = do_allocation;
+
+int
+main ()
+{
+  int i;
+
+  /* This slows down malloc a lot.  */
+  unsetenv ("MALLOC_PERTURB_");
+
+  /* Repeat a lot of times, to make sure there's no memory leak.  */
+  for (i = 0; i < 50000; i++)
+    {
+      /* Try various values.
+         n = 0 gave a crash on Alpha with gcc-2.5.8.
+         Some versions of Mac OS X have a stack size limit of 512 KB.  */
+      func (34);
+      func (134);
+      func (399);
+      func (510823);
+      func (129321);
+      func (0);
+      func (4070);
+      func (4095);
+      func (1);
+      func (16582);
+    }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-memchr.c b/src/gl/tests/test-memchr.c
new file mode 100644
index 0000000..1357d08
--- /dev/null
+++ b/src/gl/tests/test-memchr.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2008-2021 Free Software Foundation, Inc.
+ * Written by Eric Blake and Bruno Haible
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (memchr, void *, (void const *, int, size_t));
+
+#include <stdlib.h>
+
+#include "zerosize-ptr.h"
+#include "macros.h"
+
+/* Calculating void * + int is not portable, so this wrapper converts
+   to char * to make the tests easier to write.  */
+#define MEMCHR (char *) memchr
+
+int
+main (void)
+{
+  size_t n = 0x100000;
+  char *input = malloc (n);
+  ASSERT (input);
+
+  input[0] = 'a';
+  input[1] = 'b';
+  memset (input + 2, 'c', 1024);
+  memset (input + 1026, 'd', n - 1028);
+  input[n - 2] = 'e';
+  input[n - 1] = 'a';
+
+  /* Basic behavior tests.  */
+  ASSERT (MEMCHR (input, 'a', n) == input);
+
+  ASSERT (MEMCHR (input, 'a', 0) == NULL);
+
+  {
+    void *page_boundary = zerosize_ptr ();
+    if (page_boundary)
+      ASSERT (MEMCHR (page_boundary, 'a', 0) == NULL);
+  }
+
+  ASSERT (MEMCHR (input, 'b', n) == input + 1);
+  ASSERT (MEMCHR (input, 'c', n) == input + 2);
+  ASSERT (MEMCHR (input, 'd', n) == input + 1026);
+
+  ASSERT (MEMCHR (input + 1, 'a', n - 1) == input + n - 1);
+  ASSERT (MEMCHR (input + 1, 'e', n - 1) == input + n - 2);
+  ASSERT (MEMCHR (input + 1, 0x789abc00 | 'e', n - 1) == input + n - 2);
+
+  ASSERT (MEMCHR (input, 'f', n) == NULL);
+  ASSERT (MEMCHR (input, '\0', n) == NULL);
+
+  /* Check that a very long haystack is handled quickly if the byte is
+     found near the beginning.  */
+  {
+    size_t repeat = 10000;
+    for (; repeat > 0; repeat--)
+      {
+        ASSERT (MEMCHR (input, 'c', n) == input + 2);
+      }
+  }
+
+  /* Alignment tests.  */
+  {
+    int i, j;
+    for (i = 0; i < 32; i++)
+      {
+        for (j = 0; j < 256; j++)
+          input[i + j] = j;
+        for (j = 0; j < 256; j++)
+          {
+            ASSERT (MEMCHR (input + i, j, 256) == input + i + j);
+          }
+      }
+  }
+
+  /* Check that memchr() does not read past the first occurrence of the
+     byte being searched.  See the Austin Group's clarification
+     <https://www.opengroup.org/austin/docs/austin_454.txt>.
+     Test both '\0' and something else, since some implementations
+     special-case searching for NUL.
+  */
+  {
+    char *page_boundary = (char *) zerosize_ptr ();
+    /* Too small, and we miss cache line boundary tests; too large,
+       and the test takes cubically longer to complete.  */
+    int limit = 257;
+
+    if (page_boundary != NULL)
+      {
+        for (n = 1; n <= limit; n++)
+          {
+            char *mem = page_boundary - n;
+            memset (mem, 'X', n);
+            ASSERT (MEMCHR (mem, 'U', n) == NULL);
+            ASSERT (MEMCHR (mem, 0, n) == NULL);
+
+            {
+              size_t i;
+              size_t k;
+
+              for (i = 0; i < n; i++)
+                {
+                  mem[i] = 'U';
+                  for (k = i + 1; k < n + limit; k++)
+                    ASSERT (MEMCHR (mem, 'U', k) == mem + i);
+                  mem[i] = 0;
+                  for (k = i + 1; k < n + limit; k++)
+                    ASSERT (MEMCHR (mem, 0, k) == mem + i);
+                  mem[i] = 'X';
+                }
+            }
+          }
+      }
+  }
+
+  free (input);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-nanosleep.c b/src/gl/tests/test-nanosleep.c
new file mode 100644
index 0000000..4464006
--- /dev/null
+++ b/src/gl/tests/test-nanosleep.c
@@ -0,0 +1,83 @@
+/* Test of nanosleep() function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <time.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (nanosleep, int, (struct timespec const *, struct timespec *));
+
+#include <errno.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#if HAVE_DECL_ALARM
+static void
+handle_alarm (int sig)
+{
+  if (sig != SIGALRM)
+    _exit (1);
+}
+#endif
+
+int
+main (void)
+{
+  struct timespec ts;
+
+  ts.tv_sec = 1000;
+  ts.tv_nsec = -1;
+  errno = 0;
+  ASSERT (nanosleep (&ts, NULL) == -1);
+  ASSERT (errno == EINVAL);
+  ts.tv_nsec = 1000000000;
+  errno = 0;
+  ASSERT (nanosleep (&ts, NULL) == -1);
+  ASSERT (errno == EINVAL);
+
+  ts.tv_sec = 0;
+  ts.tv_nsec = 1;
+  ASSERT (nanosleep (&ts, &ts) == 0);
+  /* Remaining time is only defined on EINTR failure; but on success,
+     it is typically either 0 or unchanged from input.  At any rate,
+     it shouldn't be randomly changed to unrelated values.  */
+  ASSERT (ts.tv_sec == 0);
+  ASSERT (ts.tv_nsec == 0 || ts.tv_nsec == 1);
+  ts.tv_nsec = 0;
+  ASSERT (nanosleep (&ts, NULL) == 0);
+
+#if HAVE_DECL_ALARM
+  {
+    const time_t pentecost = 50 * 24 * 60 * 60; /* 50 days.  */
+    signal (SIGALRM, handle_alarm);
+    alarm (1);
+    ts.tv_sec = pentecost;
+    ts.tv_nsec = 999999999;
+    errno = 0;
+    ASSERT (nanosleep (&ts, &ts) == -1);
+    ASSERT (errno == EINTR);
+    ASSERT (pentecost - 10 < ts.tv_sec && ts.tv_sec <= pentecost);
+    ASSERT (0 <= ts.tv_nsec && ts.tv_nsec <= 999999999);
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-netdb.c b/src/gl/tests/test-netdb.c
new file mode 100644
index 0000000..6769e77
--- /dev/null
+++ b/src/gl/tests/test-netdb.c
@@ -0,0 +1,32 @@
+/* Test of <netdb.h> substitute.
+   Copyright (C) 2007-2008, 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson <simon@josefsson.org>, 2008.  */
+
+#include <config.h>
+#include <netdb.h>
+
+/* Check that the 'struct hostent' type is defined.  */
+struct hostent t1;
+
+/* Check that the 'socklen_t' type is defined.  */
+socklen_t t2;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-netinet_in.c b/src/gl/tests/test-netinet_in.c
new file mode 100644
index 0000000..c0de97f
--- /dev/null
+++ b/src/gl/tests/test-netinet_in.c
@@ -0,0 +1,27 @@
+/* Test of <netinet/in.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <netinet/in.h>
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-nstrftime.c b/src/gl/tests/test-nstrftime.c
new file mode 100644
index 0000000..98a2eca
--- /dev/null
+++ b/src/gl/tests/test-nstrftime.c
@@ -0,0 +1,343 @@
+/* Test that nstrftime works as required.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Jim Meyering.  */
+
+#include <config.h>
+
+#include "strftime.h"
+
+#include "intprops.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "macros.h"
+#define STREQ(a, b) (strcmp (a, b) == 0)
+
+/* Support for settings like TZ='<+00>0' was added in IEEE Std 1003.1-2001.  */
+#define TZ_ANGLE_BRACKETS_SHOULD_WORK (200112 <= _POSIX_VERSION)
+
+struct posixtm_test
+{
+  time_t in;
+  int in_ns;
+  char const *fmt;
+  char const *exp;
+};
+
+static struct posixtm_test const T[] =
+  {
+    { 1300000000, 0,            "%F", "2011-03-13" },
+    { 0,          10,           "%T.%N", "00:00:00.000000010" },
+    { 56,         123456789,    "%T.%12N", "00:00:56.123456789000" },
+    { 0,          0,            NULL, NULL }
+  };
+
+static int
+posixtm_test (void)
+{
+  int fail = 0;
+  unsigned int i;
+
+  for (i = 0; T[i].fmt; i++)
+    {
+      char buf[1000];
+      time_t t = T[i].in;
+      struct tm *tm = gmtime (&t);
+      size_t n;
+
+      ASSERT (tm);
+
+      n = nstrftime (buf, sizeof buf, T[i].fmt, tm, 0, T[i].in_ns);
+      if (n == 0)
+        {
+          fail = 1;
+          printf ("nstrftime failed with format %s\n", T[i].fmt);
+        }
+
+      if (! STREQ (buf, T[i].exp))
+        {
+          fail = 1;
+          printf ("%s: result mismatch: got %s, expected %s\n",
+                  T[i].fmt, buf, T[i].exp);
+        }
+    }
+
+  return fail;
+}
+
+struct tzalloc_test
+{
+  timezone_t tz;
+  char const *setting;
+};
+
+static struct tzalloc_test TZ[] =
+  {
+#define Pacific 0
+    { 0, "PST8PDT,M3.2.0,M11.1.0"      },
+#define Arizona 1
+    { 0, "MST7"                        },
+#define UTC 2
+    { 0, 0                             },
+#define CentEur 3
+    { 0, "CET-1CEST,M3.5.0,M10.5.0/3"  },
+#define Japan 4
+    { 0, "JST-9"                       },
+#define NZ 5
+    { 0, "NZST-12NZDT,M9.5.0,M4.1.0/3" },
+#define Unknown 6
+    { 0, "<-00>0" },
+    { 0 }
+  };
+
+struct localtime_rz_test
+{
+  /* Input parameters.  */
+  struct tzalloc_test *tza;
+  time_t t;
+
+  /* Expected result.  */
+  char const *exp;
+
+  /* Determines if an incorrectly unset tm_isdst
+     results in failure or just a warning.  */
+  int ahistorical;
+};
+
+static struct localtime_rz_test LT[] =
+  {
+    { TZ+Pacific,          0, "1969-12-31 16:00:00 -0800 (PST)",  0 },
+    { TZ+Arizona,          0, "1969-12-31 17:00:00 -0700 (MST)",  0 },
+    { TZ+UTC    ,          0, "1970-01-01 00:00:00 +0000 (UTC)",  0 },
+    { TZ+CentEur,          0, "1970-01-01 01:00:00 +0100 (CET)",  0 },
+    { TZ+Japan  ,          0, "1970-01-01 09:00:00 +0900 (JST)",  0 },
+    { TZ+NZ     ,          0, "1970-01-01 13:00:00 +1300 (NZDT)", 1 },
+    { TZ+Pacific,  500000001, "1985-11-04 16:53:21 -0800 (PST)",  0 },
+    { TZ+Arizona,  500000001, "1985-11-04 17:53:21 -0700 (MST)",  0 },
+    { TZ+UTC    ,  500000001, "1985-11-05 00:53:21 +0000 (UTC)",  0 },
+    { TZ+CentEur,  500000001, "1985-11-05 01:53:21 +0100 (CET)",  1 },
+    { TZ+Japan  ,  500000001, "1985-11-05 09:53:21 +0900 (JST)",  0 },
+    { TZ+NZ     ,  500000001, "1985-11-05 13:53:21 +1300 (NZDT)", 0 },
+    { TZ+Pacific, 1000000002, "2001-09-08 18:46:42 -0700 (PDT)",  0 },
+    { TZ+Arizona, 1000000002, "2001-09-08 18:46:42 -0700 (MST)",  0 },
+    { TZ+UTC    , 1000000002, "2001-09-09 01:46:42 +0000 (UTC)",  0 },
+    { TZ+CentEur, 1000000002, "2001-09-09 03:46:42 +0200 (CEST)", 0 },
+    { TZ+Japan  , 1000000002, "2001-09-09 10:46:42 +0900 (JST)",  0 },
+    { TZ+NZ     , 1000000002, "2001-09-09 13:46:42 +1200 (NZST)", 0 },
+#if TZ_ANGLE_BRACKETS_SHOULD_WORK
+    { TZ+Unknown,          0, "1970-01-01 00:00:00 -0000 (-00)",  0 },
+    { TZ+Unknown,  500000001, "1985-11-05 00:53:21 -0000 (-00)",  0 },
+    { TZ+Unknown, 1000000002, "2001-09-09 01:46:42 -0000 (-00)",  0 },
+#endif
+    { 0 }
+  };
+
+static int
+tzalloc_test (void)
+{
+  int fail = 0;
+  int i;
+
+  for (i = 0; LT[i].tza; i++)
+    {
+      struct tzalloc_test *tza = LT[i].tza;
+      long lt = LT[i].t;
+      timezone_t tz = tza->tz;
+      char const *setting;
+      static char const format[] = "%Y-%m-%d %H:%M:%S %z (%Z)";
+      char buf[1000];
+      struct tm tm;
+      size_t n;
+
+      if (!tz && tza->setting)
+        {
+          tz = tzalloc (tza->setting);
+          if (!tz)
+            {
+              fail = 1;
+              printf ("%s: tzalloc: %s\n", TZ[i].setting, strerror (errno));
+              continue;
+            }
+          tza->tz = tz;
+        }
+
+      setting = tza->setting ? tza->setting : "UTC0";
+
+      if (!localtime_rz (tz, &LT[i].t, &tm))
+        {
+          fail = 1;
+          printf ("%s: %ld: localtime_rz: %s\n", setting, lt,
+                  strerror (errno));
+          continue;
+        }
+
+      n = nstrftime (buf, sizeof buf, format, &tm, tz, 0);
+      if (n == 0)
+        {
+          fail = 1;
+          printf ("%s: %ld: nstrftime failed\n", setting, lt);
+          continue;
+        }
+
+      if (! (STREQ (buf, LT[i].exp)
+             || (!tz && n == strlen (LT[i].exp)
+                 && memcmp (buf, LT[i].exp, n - sizeof "(GMT)" + 1) == 0
+                 && STREQ (buf + n - sizeof "(GMT)" + 1, "(GMT)"))))
+        {
+          /* Don't fail for unhandled dst in ahistorical entries,
+             as gnulib doesn't currently fix that issue, seen on Darwin 14.  */
+          if (!LT[i].ahistorical || tm.tm_isdst)
+            fail = 1;
+          printf ("%s: expected \"%s\", got \"%s\"\n",
+                  setting, LT[i].exp, buf);
+        }
+    }
+
+  return fail;
+}
+
+
+static int
+quarter_test (void)
+{
+  int result = 0;
+  size_t mon;
+
+  /* Check %q.  */
+  for (mon = 1; mon <= 12; mon++)
+    {
+      char out[2];
+      char exp[2] = {0,};
+      struct tm qtm = { .tm_mon = mon - 1 };
+      char fmt[3] = {'%','q','\0'};
+
+      size_t r = nstrftime (out, sizeof (out), fmt, &qtm, 0, 0);
+      if (r == 0)
+        {
+          puts ("nstrftime(\"%q\") failed");
+          result = 1;
+          break;
+        }
+
+      exp[0] = mon < 4 ? '1' : mon < 7 ? '2' : mon < 10 ? '3' : '4';
+      if (strcmp (out, exp) != 0)
+        {
+          printf ("nstrftime %%q: expected \"%s\", got \"%s\"\n", exp, out);
+          result = 1;
+          break;
+        }
+    }
+
+  return result;
+}
+
+static int
+errno_test (void)
+{
+  int fail = 0;
+  struct tm tm = { .tm_year = 2020 - 1900, .tm_mday = 1 };
+  char buf[INT_BUFSIZE_BOUND (time_t)];
+  size_t n;
+  int bigyear = LLONG_MAX - 1900 < INT_MAX ? LLONG_MAX - 1900 : INT_MAX;
+
+  errno = 0;
+  n = nstrftime (buf, 0, "%m", &tm, 0, 0);
+  if (! (n == 0 && errno == ERANGE))
+    {
+      fail = 1;
+      printf ("nstrftime failed to set errno = ERANGE\n");
+    }
+
+  errno = 0;
+  n = nstrftime (buf, sizeof buf, "", &tm, 0, 0);
+  if (! (n == 0 && errno == 0))
+    {
+      fail = 1;
+      printf ("nstrftime failed to leave errno alone\n");
+    }
+
+
+  tm.tm_year = bigyear;
+  errno = 0;
+  n = nstrftime (buf, sizeof buf, "%s", &tm, 0, 0);
+  if (n == 0)
+    {
+      if (errno != EOVERFLOW)
+        {
+          fail = 1;
+          printf ("nstrftime failed to set errno = EOVERFLOW\n");
+        }
+
+      if (mktime_z (0, &tm) != (time_t) -1)
+        {
+          fail = 1;
+          printf ("nstrftime %%s failed but mktime_z worked for tm_year=%d\n",
+                  bigyear);
+        }
+    }
+  else
+    {
+      long long int text_seconds = atoll (buf);
+      if (text_seconds <= (LLONG_MAX - 1 < TYPE_MAXIMUM (time_t)
+                           ? LLONG_MAX - 1 : TYPE_MAXIMUM (time_t)))
+        {
+          time_t bigtime = text_seconds;
+          struct tm *tmp = gmtime (&bigtime);
+          if (!tmp)
+            {
+              fail = 1;
+              printf ("gmtime failed on nstrftime result\n");
+            }
+          else
+            {
+              char buf1[sizeof buf];
+              size_t n1 = nstrftime (buf1, sizeof buf1, "%s", tmp, 0, 0);
+              buf1[n1] = '\0';
+              if (! STREQ (buf, buf1))
+                {
+                  fail = 1;
+                  printf ("nstrftime %%s first returned '%s', then '%s'\n",
+                          buf, buf1);
+                }
+            }
+        }
+    }
+
+  return fail;
+}
+
+int
+main (void)
+{
+  int fail = 0;
+  fail |= posixtm_test ();
+  fail |= tzalloc_test ();
+  fail |= quarter_test ();
+  fail |= errno_test ();
+  return fail;
+}
+
+/*
+Local Variables:
+indent-tabs-mode: nil
+End:
+*/
diff --git a/src/gl/tests/test-once.c b/src/gl/tests/test-once.c
new file mode 100644
index 0000000..807c6a3
--- /dev/null
+++ b/src/gl/tests/test-once.c
@@ -0,0 +1,43 @@
+/* Test of once-only execution in multithreaded situations.
+   Copyright (C) 2018-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
+
+#include <config.h>
+
+#include "glthread/lock.h"
+
+#include "macros.h"
+
+gl_once_define(static, a_once)
+
+static int a;
+
+static void
+a_init (void)
+{
+  a = 42;
+}
+
+int
+main ()
+{
+  gl_once (a_once, a_init);
+
+  ASSERT (a == 42);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-open.c b/src/gl/tests/test-open.c
new file mode 100644
index 0000000..1524af4
--- /dev/null
+++ b/src/gl/tests/test-open.c
@@ -0,0 +1,41 @@
+/* Test of opening a file descriptor.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <fcntl.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (open, int, (char const *, int, ...));
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#define BASE "test-open.t"
+
+#include "test-open.h"
+
+int
+main (void)
+{
+  return test_open (open, true);
+}
diff --git a/src/gl/tests/test-open.h b/src/gl/tests/test-open.h
new file mode 100644
index 0000000..9ceb798
--- /dev/null
+++ b/src/gl/tests/test-open.h
@@ -0,0 +1,133 @@
+/* Test of opening a file descriptor.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+/* Make test_open always inline if we're using Fortify, which defines
+   __always_inline to do that.  Do nothing otherwise.  This works
+   around a glibc bug whereby 'open' cannot be used as a function
+   pointer when _FORTIFY_SOURCE is positive.  */
+
+#if __GLIBC__ && defined __always_inline
+# define ALWAYS_INLINE __always_inline
+#else
+# define ALWAYS_INLINE
+#endif
+
+/* This file is designed to test both open(n,buf[,mode]) and
+   openat(AT_FDCWD,n,buf[,mode]).  FUNC is the function to test.
+   Assumes that BASE and ASSERT are already defined, and that
+   appropriate headers are already included.  If PRINT, warn before
+   skipping symlink tests with status 77.  */
+
+static ALWAYS_INLINE int
+test_open (int (*func) (char const *, int, ...), bool print)
+{
+  int fd;
+
+  /* Remove anything from prior partial run.  */
+  unlink (BASE "file");
+  unlink (BASE "e.exe");
+  unlink (BASE "link");
+
+  /* Cannot create directory.  */
+  errno = 0;
+  ASSERT (func ("nonexist.ent/", O_CREAT | O_RDONLY, 0600) == -1);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == ENOENT
+          || errno == EINVAL);
+
+  /* Create a regular file.  */
+  fd = func (BASE "file", O_CREAT | O_RDONLY, 0600);
+  ASSERT (0 <= fd);
+  ASSERT (close (fd) == 0);
+
+  /* Create an executable regular file.  */
+  fd = func (BASE "e.exe", O_CREAT | O_RDONLY, 0700);
+  ASSERT (0 <= fd);
+  ASSERT (close (fd) == 0);
+
+  /* Trailing slash handling.  */
+  errno = 0;
+  ASSERT (func (BASE "file/", O_RDONLY) == -1);
+  ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
+
+  /* Directories cannot be opened for writing.  */
+  errno = 0;
+  ASSERT (func (".", O_WRONLY) == -1);
+  ASSERT (errno == EISDIR || errno == EACCES);
+
+  /* /dev/null must exist, and be writable.  */
+  fd = func ("/dev/null", O_RDONLY);
+  ASSERT (0 <= fd);
+  {
+    char c;
+    ASSERT (read (fd, &c, 1) == 0);
+  }
+  ASSERT (close (fd) == 0);
+  fd = func ("/dev/null", O_WRONLY);
+  ASSERT (0 <= fd);
+  ASSERT (write (fd, "c", 1) == 1);
+  ASSERT (close (fd) == 0);
+
+  /* Although O_NONBLOCK on regular files can be ignored, it must not
+     cause a failure.  */
+  fd = func (BASE "file", O_NONBLOCK | O_RDONLY);
+  ASSERT (0 <= fd);
+  ASSERT (close (fd) == 0);
+
+  /* O_CLOEXEC must be honoured.  */
+  if (O_CLOEXEC)
+    {
+      /* Since the O_CLOEXEC handling goes through a special code path at its
+         first invocation, test it twice.  */
+      int i;
+
+      for (i = 0; i < 2; i++)
+        {
+          int flags;
+
+          fd = func (BASE "file", O_CLOEXEC | O_RDONLY);
+          ASSERT (0 <= fd);
+          flags = fcntl (fd, F_GETFD);
+          ASSERT (flags >= 0);
+          ASSERT ((flags & FD_CLOEXEC) != 0);
+          ASSERT (close (fd) == 0);
+        }
+    }
+
+  /* Symlink handling, where supported.  */
+  if (symlink (BASE "file", BASE "link") != 0)
+    {
+      ASSERT (unlink (BASE "file") == 0);
+      if (print)
+        fputs ("skipping test: symlinks not supported on this file system\n",
+               stderr);
+      return 77;
+    }
+  errno = 0;
+  ASSERT (func (BASE "link/", O_RDONLY) == -1);
+  ASSERT (errno == ENOTDIR);
+  fd = func (BASE "link", O_RDONLY);
+  ASSERT (0 <= fd);
+  ASSERT (close (fd) == 0);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "e.exe") == 0);
+  ASSERT (unlink (BASE "link") == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-parse-datetime.c b/src/gl/tests/test-parse-datetime.c
new file mode 100644
index 0000000..b972e96
--- /dev/null
+++ b/src/gl/tests/test-parse-datetime.c
@@ -0,0 +1,466 @@
+/* Test of parse_datetime() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson <simon@josefsson.org>, 2008.  */
+
+#include <config.h>
+
+#include "parse-datetime.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#ifdef DEBUG
+#define LOG(str, now, res)                                              \
+  printf ("string '%s' diff %d %d\n",                                 \
+          str, res.tv_sec - now.tv_sec, res.tv_nsec - now.tv_nsec);
+#else
+#define LOG(str, now, res) (void) 0
+#endif
+
+static const char *const day_table[] =
+{
+  "SUNDAY",
+  "MONDAY",
+  "TUESDAY",
+  "WEDNESDAY",
+  "THURSDAY",
+  "FRIDAY",
+  "SATURDAY",
+  NULL
+};
+
+
+#if ! HAVE_TM_GMTOFF
+/* Shift A right by B bits portably, by dividing A by 2**B and
+   truncating towards minus infinity.  A and B should be free of side
+   effects, and B should be in the range 0 <= B <= INT_BITS - 2, where
+   INT_BITS is the number of useful bits in an int.  GNU code can
+   assume that INT_BITS is at least 32.
+
+   ISO C99 says that A >> B is implementation-defined if A < 0.  Some
+   implementations (e.g., UNICOS 9.0 on a Cray Y-MP EL) don't shift
+   right in the usual way when A < 0, so SHR falls back on division if
+   ordinary A >> B doesn't seem to be the usual signed shift.  */
+#define SHR(a, b)       \
+  (-1 >> 1 == -1        \
+   ? (a) >> (b)         \
+   : (a) / (1 << (b)) - ((a) % (1 << (b)) < 0))
+
+#define TM_YEAR_BASE 1900
+
+/* Yield the difference between *A and *B,
+   measured in seconds, ignoring leap seconds.
+   The body of this function is taken directly from the GNU C Library;
+   see src/strftime.c.  */
+static long int
+tm_diff (struct tm const *a, struct tm const *b)
+{
+  /* Compute intervening leap days correctly even if year is negative.
+     Take care to avoid int overflow in leap day calculations.  */
+  int a4 = SHR (a->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (a->tm_year & 3);
+  int b4 = SHR (b->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (b->tm_year & 3);
+  int a100 = a4 / 25 - (a4 % 25 < 0);
+  int b100 = b4 / 25 - (b4 % 25 < 0);
+  int a400 = SHR (a100, 2);
+  int b400 = SHR (b100, 2);
+  int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
+  long int ayear = a->tm_year;
+  long int years = ayear - b->tm_year;
+  long int days = (365 * years + intervening_leap_days
+                   + (a->tm_yday - b->tm_yday));
+  return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
+                + (a->tm_min - b->tm_min))
+          + (a->tm_sec - b->tm_sec));
+}
+#endif /* ! HAVE_TM_GMTOFF */
+
+static long
+gmt_offset (time_t s)
+{
+  long gmtoff;
+
+#if !HAVE_TM_GMTOFF
+  struct tm tm_local = *localtime (&s);
+  struct tm tm_gmt   = *gmtime (&s);
+
+  gmtoff = tm_diff (&tm_local, &tm_gmt);
+#else
+  gmtoff = localtime (&s)->tm_gmtoff;
+#endif
+
+  return gmtoff;
+}
+
+int
+main (int argc _GL_UNUSED, char **argv)
+{
+  struct timespec result;
+  struct timespec result2;
+  struct timespec expected;
+  struct timespec now;
+  const char *p;
+  int i;
+  long gmtoff;
+  time_t ref_time = 1304250918;
+
+  /* Set the time zone to US Eastern time with the 2012 rules.  This
+     should disable any leap second support.  Otherwise, there will be
+     a problem with glibc on sites that default to leap seconds; see
+     <https://bugs.gnu.org/12206>.  */
+  setenv ("TZ", "EST5EDT,M3.2.0,M11.1.0", 1);
+
+  gmtoff = gmt_offset (ref_time);
+
+
+  /* ISO 8601 extended date and time of day representation,
+     'T' separator, local time zone */
+  p = "2011-05-01T11:55:18";
+  expected.tv_sec = ref_time - gmtoff;
+  expected.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, 0));
+  LOG (p, expected, result);
+  ASSERT (expected.tv_sec == result.tv_sec
+          && expected.tv_nsec == result.tv_nsec);
+
+  /* ISO 8601 extended date and time of day representation,
+     ' ' separator, local time zone */
+  p = "2011-05-01 11:55:18";
+  expected.tv_sec = ref_time - gmtoff;
+  expected.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, 0));
+  LOG (p, expected, result);
+  ASSERT (expected.tv_sec == result.tv_sec
+          && expected.tv_nsec == result.tv_nsec);
+
+
+  /* ISO 8601, extended date and time of day representation,
+     'T' separator, UTC */
+  p = "2011-05-01T11:55:18Z";
+  expected.tv_sec = ref_time;
+  expected.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, 0));
+  LOG (p, expected, result);
+  ASSERT (expected.tv_sec == result.tv_sec
+          && expected.tv_nsec == result.tv_nsec);
+
+  /* ISO 8601, extended date and time of day representation,
+     ' ' separator, UTC */
+  p = "2011-05-01 11:55:18Z";
+  expected.tv_sec = ref_time;
+  expected.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, 0));
+  LOG (p, expected, result);
+  ASSERT (expected.tv_sec == result.tv_sec
+          && expected.tv_nsec == result.tv_nsec);
+
+
+  /* ISO 8601 extended date and time of day representation,
+     'T' separator, w/UTC offset */
+  p = "2011-05-01T11:55:18-07:00";
+  expected.tv_sec = 1304276118;
+  expected.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, 0));
+  LOG (p, expected, result);
+  ASSERT (expected.tv_sec == result.tv_sec
+          && expected.tv_nsec == result.tv_nsec);
+
+  /* ISO 8601 extended date and time of day representation,
+     ' ' separator, w/UTC offset */
+  p = "2011-05-01 11:55:18-07:00";
+  expected.tv_sec = 1304276118;
+  expected.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, 0));
+  LOG (p, expected, result);
+  ASSERT (expected.tv_sec == result.tv_sec
+          && expected.tv_nsec == result.tv_nsec);
+
+
+  /* ISO 8601 extended date and time of day representation,
+     'T' separator, w/hour only UTC offset */
+  p = "2011-05-01T11:55:18-07";
+  expected.tv_sec = 1304276118;
+  expected.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, 0));
+  LOG (p, expected, result);
+  ASSERT (expected.tv_sec == result.tv_sec
+          && expected.tv_nsec == result.tv_nsec);
+
+  /* ISO 8601 extended date and time of day representation,
+     ' ' separator, w/hour only UTC offset */
+  p = "2011-05-01 11:55:18-07";
+  expected.tv_sec = 1304276118;
+  expected.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, 0));
+  LOG (p, expected, result);
+  ASSERT (expected.tv_sec == result.tv_sec
+          && expected.tv_nsec == result.tv_nsec);
+
+
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "now";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  ASSERT (now.tv_sec == result.tv_sec && now.tv_nsec == result.tv_nsec);
+
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "tomorrow";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  ASSERT (now.tv_sec + 24 * 60 * 60 == result.tv_sec
+          && now.tv_nsec == result.tv_nsec);
+
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "yesterday";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  ASSERT (now.tv_sec - 24 * 60 * 60 == result.tv_sec
+          && now.tv_nsec == result.tv_nsec);
+
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "4 hours";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  ASSERT (now.tv_sec + 4 * 60 * 60 == result.tv_sec
+          && now.tv_nsec == result.tv_nsec);
+
+  /* test if timezone is not being ignored for day offset */
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC+400 +24 hours";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  p = "UTC+400 +1 day";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+
+  /* test if several time zones formats are handled same way */
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC+14:00";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  p = "UTC+14";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+  p = "UTC+1400";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC-14:00";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  p = "UTC-14";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+  p = "UTC-1400";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC+0:15";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  p = "UTC+0015";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC-1:30";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  p = "UTC-130";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+
+
+  /* TZ out of range should cause parse_datetime failure */
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC+25:00";
+  ASSERT (!parse_datetime (&result, p, &now));
+
+        /* Check for several invalid countable dayshifts */
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC+4:00 +40 yesterday";
+  ASSERT (!parse_datetime (&result, p, &now));
+  p = "UTC+4:00 next yesterday";
+  ASSERT (!parse_datetime (&result, p, &now));
+  p = "UTC+4:00 tomorrow ago";
+  ASSERT (!parse_datetime (&result, p, &now));
+  p = "UTC+4:00 tomorrow hence";
+  ASSERT (!parse_datetime (&result, p, &now));
+  p = "UTC+4:00 40 now ago";
+  ASSERT (!parse_datetime (&result, p, &now));
+  p = "UTC+4:00 last tomorrow";
+  ASSERT (!parse_datetime (&result, p, &now));
+  p = "UTC+4:00 -4 today";
+  ASSERT (!parse_datetime (&result, p, &now));
+
+  /* And check correct usage of dayshifts */
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC+400 tomorrow";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  p = "UTC+400 +1 day";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+  p = "UTC+400 1 day hence";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC+400 yesterday";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  p = "UTC+400 1 day ago";
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+  now.tv_sec = 4711;
+  now.tv_nsec = 1267;
+  p = "UTC+400 now";
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  p = "UTC+400 +0 minutes"; /* silly, but simple "UTC+400" is different*/
+  ASSERT (parse_datetime (&result2, p, &now));
+  LOG (p, now, result2);
+  ASSERT (result.tv_sec == result2.tv_sec
+          && result.tv_nsec == result2.tv_nsec);
+
+  /* Check that some "next Monday", "last Wednesday", etc. are correct.  */
+  setenv ("TZ", "UTC0", 1);
+  for (i = 0; day_table[i]; i++)
+    {
+      unsigned int thur2 = 7 * 24 * 3600; /* 2nd thursday */
+      char tmp[32];
+      sprintf (tmp, "NEXT %s", day_table[i]);
+      now.tv_sec = thur2 + 4711;
+      now.tv_nsec = 1267;
+      ASSERT (parse_datetime (&result, tmp, &now));
+      LOG (tmp, now, result);
+      ASSERT (result.tv_nsec == 0);
+      ASSERT (result.tv_sec == thur2 + (i == 4 ? 7 : (i + 3) % 7) * 24 * 3600);
+
+      sprintf (tmp, "LAST %s", day_table[i]);
+      now.tv_sec = thur2 + 4711;
+      now.tv_nsec = 1267;
+      ASSERT (parse_datetime (&result, tmp, &now));
+      LOG (tmp, now, result);
+      ASSERT (result.tv_nsec == 0);
+      ASSERT (result.tv_sec == thur2 + ((i + 3) % 7 - 7) * 24 * 3600);
+    }
+
+  p = "THURSDAY UTC+00";  /* The epoch was on Thursday.  */
+  now.tv_sec = 0;
+  now.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  ASSERT (result.tv_sec == now.tv_sec
+          && result.tv_nsec == now.tv_nsec);
+
+  p = "FRIDAY UTC+00";
+  now.tv_sec = 0;
+  now.tv_nsec = 0;
+  ASSERT (parse_datetime (&result, p, &now));
+  LOG (p, now, result);
+  ASSERT (result.tv_sec == 24 * 3600
+          && result.tv_nsec == now.tv_nsec);
+
+  /* Exercise a sign-extension bug.  Before July 2012, an input
+     starting with a high-bit-set byte would be treated like "0".  */
+  ASSERT ( ! parse_datetime (&result, "\xb0", &now));
+
+  /* Exercise TZ="" parsing code.  */
+  /* These two would infloop or segfault before Feb 2014.  */
+  ASSERT ( ! parse_datetime (&result, "TZ=\"\"\"", &now));
+  ASSERT ( ! parse_datetime (&result, "TZ=\"\" \"", &now));
+  /* Exercise invalid patterns.  */
+  ASSERT ( ! parse_datetime (&result, "TZ=\"", &now));
+  ASSERT ( ! parse_datetime (&result, "TZ=\"\\\"", &now));
+  ASSERT ( ! parse_datetime (&result, "TZ=\"\\n", &now));
+  ASSERT ( ! parse_datetime (&result, "TZ=\"\\n\"", &now));
+  /* Exercise valid patterns.  */
+  ASSERT (   parse_datetime (&result, "TZ=\"\"", &now));
+  ASSERT (   parse_datetime (&result, "TZ=\"\" ", &now));
+  ASSERT (   parse_datetime (&result, " TZ=\"\"", &now));
+  /* Exercise patterns which may be valid or invalid, depending on the
+     platform.  */
+#if !defined __NetBSD__
+  ASSERT (   parse_datetime (&result, "TZ=\"\\\\\"", &now));
+  ASSERT (   parse_datetime (&result, "TZ=\"\\\"\"", &now));
+#endif
+
+  /* Outlandishly-long time zone abbreviations should not cause problems.  */
+  {
+    static char const bufprefix[] = "TZ=\"";
+    long int tzname_max = -1;
+    errno = 0;
+#ifdef _SC_TZNAME_MAX
+    tzname_max = sysconf (_SC_TZNAME_MAX);
+#endif
+    enum { tzname_alloc = 2000 };
+    if (tzname_max < 0)
+      tzname_max = errno ? 6 : tzname_alloc;
+    int tzname_len = tzname_alloc < tzname_max ? tzname_alloc : tzname_max;
+    static char const bufsuffix[] = "0\" 1970-01-01 01:02:03.123456789";
+    enum { bufsize = sizeof bufprefix - 1 + tzname_alloc + sizeof bufsuffix };
+    char buf[bufsize];
+    memcpy (buf, bufprefix, sizeof bufprefix - 1);
+    memset (buf + sizeof bufprefix - 1, 'X', tzname_len);
+    strcpy (buf + sizeof bufprefix - 1 + tzname_len, bufsuffix);
+    ASSERT (parse_datetime (&result, buf, &now));
+    LOG (buf, now, result);
+    ASSERT (result.tv_sec == 1 * 60 * 60 + 2 * 60 + 3
+            && result.tv_nsec == 123456789);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-pathmax.c b/src/gl/tests/test-pathmax.c
new file mode 100644
index 0000000..2ba1cc2
--- /dev/null
+++ b/src/gl/tests/test-pathmax.c
@@ -0,0 +1,32 @@
+/* Test of "pathmax.h".
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include "pathmax.h"
+
+/* Check that PATH_MAX is a constant if it is defined.  */
+#ifdef PATH_MAX
+int a = PATH_MAX;
+#endif
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-perror.c b/src/gl/tests/test-perror.c
new file mode 100644
index 0000000..1012396
--- /dev/null
+++ b/src/gl/tests/test-perror.c
@@ -0,0 +1,36 @@
+/* Test of perror() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (perror, void, (char const *));
+
+#include <errno.h>
+
+int
+main (int argc, char **argv)
+{
+  const char *prefix = (argc > 1 ? argv[1] : NULL);
+
+  errno = EACCES;    perror (prefix);
+  errno = ETIMEDOUT; perror (prefix);
+  errno = EOVERFLOW; perror (prefix);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-perror.sh b/src/gl/tests/test-perror.sh
new file mode 100755
index 0000000..e776609
--- /dev/null
+++ b/src/gl/tests/test-perror.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+: ${srcdir=.}
+. "$srcdir/init.sh"; path_prepend_ .
+
+# Test NULL prefix. Result should not contain a number, except in lines that
+# start with 'EDC' (IBM z/OS libc produces an error identifier before the
+# error message).
+${CHECKER} test-perror 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror.tmp
+grep -v '^EDC' t-perror.tmp | grep '[0-9]' > /dev/null \
+  && fail_ "result should not contain a number"
+
+# Test empty prefix. Result should be the same.
+${CHECKER} test-perror '' 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror1.tmp
+diff t-perror.tmp t-perror1.tmp \
+  || fail_ "empty prefix should behave like NULL argument"
+
+# Test non-empty prefix.
+${CHECKER} test-perror foo 2>&1 >/dev/null | LC_ALL=C tr -d '\r' > t-perror3.tmp
+sed -e 's/^/foo: /' < t-perror.tmp > t-perror2.tmp
+diff t-perror2.tmp t-perror3.tmp || fail_ "prefix applied incorrectly"
+
+# Test exit status.
+${CHECKER} test-perror >out 2>/dev/null || fail_ "unexpected exit status"
+test -s out && fail_ "unexpected output"
+
+Exit 0
diff --git a/src/gl/tests/test-perror2.c b/src/gl/tests/test-perror2.c
new file mode 100644
index 0000000..adce4a6
--- /dev/null
+++ b/src/gl/tests/test-perror2.c
@@ -0,0 +1,133 @@
+/* Test of perror() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+/* This test intentionally parses stderr.  So, we arrange to have fd 10
+   (outside the range of interesting fd's during the test) set up to
+   duplicate the original stderr.  */
+#define BACKUP_STDERR_FILENO 10
+#define ASSERT_STREAM myerr
+#include "macros.h"
+
+static FILE *myerr;
+
+#define BASE "test-perror2"
+
+int
+main (void)
+{
+  /* We change fd 2 later, so save it in fd 10.  */
+  if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
+      || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
+    return 2;
+
+  ASSERT (freopen (BASE ".tmp", "w+", stderr) == stderr);
+
+  /* Test that perror does not clobber strerror buffer.  */
+  {
+    const char *msg1;
+    const char *msg2;
+    const char *msg3;
+    const char *msg4;
+    char *str1;
+    char *str2;
+    char *str3;
+    char *str4;
+
+    msg1 = strerror (ENOENT);
+    ASSERT (msg1);
+    str1 = strdup (msg1);
+    ASSERT (str1);
+
+    msg2 = strerror (ERANGE);
+    ASSERT (msg2);
+    str2 = strdup (msg2);
+    ASSERT (str2);
+
+    msg3 = strerror (-4);
+    ASSERT (msg3);
+    str3 = strdup (msg3);
+    ASSERT (str3);
+
+    msg4 = strerror (1729576);
+    ASSERT (msg4);
+    str4 = strdup (msg4);
+    ASSERT (str4);
+
+    errno = EACCES;
+    perror ("");
+    errno = -5;
+    perror ("");
+    ASSERT (!ferror (stderr));
+    ASSERT (STREQ (msg4, str4));
+
+    free (str1);
+    free (str2);
+    free (str3);
+    free (str4);
+  }
+
+  /* Test that perror uses the same message as strerror.  */
+  {
+    int errs[] = { EACCES, 0, -3, };
+    int i;
+    for (i = 0; i < SIZEOF (errs); i++)
+      {
+        char buf[256];
+        const char *err = strerror (errs[i]);
+
+        ASSERT (err);
+        ASSERT (strlen (err) < sizeof buf);
+        rewind (stderr);
+        ASSERT (ftruncate (fileno (stderr), 0) == 0);
+        errno = errs[i];
+        perror (NULL);
+        ASSERT (!ferror (stderr));
+        rewind (stderr);
+        ASSERT (fgets (buf, sizeof buf, stderr) == buf);
+        ASSERT (strstr (buf, err));
+      }
+  }
+
+  /* Test that perror reports write failure.  */
+  {
+    ASSERT (freopen (BASE ".tmp", "r", stderr) == stderr);
+    ASSERT (setvbuf (stderr, NULL, _IONBF, BUFSIZ) == 0);
+    errno = -1;
+    ASSERT (!ferror (stderr));
+    perror (NULL);
+#if 0
+    /* Commented out until cygwin behaves:
+       https://sourceware.org/ml/newlib/2011/msg00228.html */
+    ASSERT (errno > 0);
+    /* Commented out until glibc behaves:
+       https://sourceware.org/bugzilla/show_bug.cgi?id=12792 */
+    ASSERT (ferror (stderr));
+#endif
+  }
+
+  ASSERT (fclose (stderr) == 0);
+  ASSERT (remove (BASE ".tmp") == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-pipe.c b/src/gl/tests/test-pipe.c
new file mode 100644
index 0000000..5ae2a0a
--- /dev/null
+++ b/src/gl/tests/test-pipe.c
@@ -0,0 +1,108 @@
+/* Test of pipe.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (pipe, int, (int[2]));
+
+#include <fcntl.h>
+#include <stdbool.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+/* Get declarations of the native Windows API functions.  */
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+/* Get _get_osfhandle.  */
+# if GNULIB_MSVC_NOTHROW
+#  include "msvc-nothrow.h"
+# else
+#  include <io.h>
+# endif
+#endif
+
+#include "binary-io.h"
+#include "macros.h"
+
+/* Return true if FD is open.  */
+static bool
+is_open (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* On native Windows, the initial state of unassigned standard file
+     descriptors is that they are open but point to an
+     INVALID_HANDLE_VALUE, and there is no fcntl.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+#else
+# ifndef F_GETFL
+#  error Please port fcntl to your platform
+# endif
+  return 0 <= fcntl (fd, F_GETFL);
+#endif
+}
+
+/* Return true if FD is not inherited to child processes.  */
+static bool
+is_cloexec (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  HANDLE h = (HANDLE) _get_osfhandle (fd);
+  DWORD flags;
+  ASSERT (GetHandleInformation (h, &flags));
+  return (flags & HANDLE_FLAG_INHERIT) == 0;
+#else
+  int flags;
+  ASSERT ((flags = fcntl (fd, F_GETFD)) >= 0);
+  return (flags & FD_CLOEXEC) != 0;
+#endif
+}
+
+/* Return true if FD is in non-blocking mode.  */
+static bool
+is_nonblocking (int fd)
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  /* We don't use the non-blocking mode for sockets here.  */
+  return 0;
+#else
+  int flags;
+  ASSERT ((flags = fcntl (fd, F_GETFL)) >= 0);
+  return (flags & O_NONBLOCK) != 0;
+#endif
+}
+
+int
+main ()
+{
+  int fd[2];
+
+  fd[0] = -1;
+  fd[1] = -1;
+  ASSERT (pipe (fd) >= 0);
+  ASSERT (fd[0] >= 0);
+  ASSERT (fd[1] >= 0);
+  ASSERT (fd[0] != fd[1]);
+  ASSERT (is_open (fd[0]));
+  ASSERT (is_open (fd[1]));
+  ASSERT (!is_cloexec (fd[0]));
+  ASSERT (!is_cloexec (fd[1]));
+  ASSERT (!is_nonblocking (fd[0]));
+  ASSERT (!is_nonblocking (fd[1]));
+
+  return 0;
+}
diff --git a/src/gl/tests/test-pthread-thread.c b/src/gl/tests/test-pthread-thread.c
new file mode 100644
index 0000000..094e8d1
--- /dev/null
+++ b/src/gl/tests/test-pthread-thread.c
@@ -0,0 +1,73 @@
+/* Test of pthread_create () function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <pthread.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "macros.h"
+
+static pthread_t main_thread_before;
+static pthread_t main_thread_after;
+static pthread_t worker_thread;
+
+#define MAGIC ((void *) 1266074729)
+static volatile int work_done;
+
+static void *
+worker_thread_func (void *arg)
+{
+  work_done = 1;
+  return MAGIC;
+}
+
+int
+main ()
+{
+  main_thread_before = pthread_self ();
+
+  if (pthread_create (&worker_thread, NULL, worker_thread_func, NULL) == 0)
+    {
+      void *ret;
+
+      /* Check that pthread_self () has the same value before than after the
+         first call to pthread_create ().  */
+      main_thread_after = pthread_self ();
+      ASSERT (memcmp (&main_thread_before, &main_thread_after,
+                      sizeof (pthread_t))
+              == 0);
+
+      ASSERT (pthread_join (worker_thread, &ret) == 0);
+
+      /* Check the return value of the thread.  */
+      ASSERT (ret == MAGIC);
+
+      /* Check that worker_thread_func () has finished executing.  */
+      ASSERT (work_done);
+
+      return 0;
+    }
+  else
+    {
+      fputs ("pthread_create failed\n", stderr);
+      return 1;
+    }
+}
diff --git a/src/gl/tests/test-pthread.c b/src/gl/tests/test-pthread.c
new file mode 100644
index 0000000..89c68dc
--- /dev/null
+++ b/src/gl/tests/test-pthread.c
@@ -0,0 +1,90 @@
+/* Test of <pthread.h> substitute.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+#include <pthread.h>
+
+#include "verify.h"
+
+/* Check that the types are all defined.  */
+
+pthread_t t1;
+pthread_attr_t t2;
+
+pthread_once_t t3 = PTHREAD_ONCE_INIT;
+
+pthread_mutex_t t4 = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutexattr_t t5;
+
+pthread_rwlock_t t6 = PTHREAD_RWLOCK_INITIALIZER;
+pthread_rwlockattr_t t7;
+
+pthread_cond_t t8 = PTHREAD_COND_INITIALIZER;
+pthread_condattr_t t9;
+
+pthread_key_t t10;
+
+pthread_spinlock_t t11;
+
+#ifdef TODO /* Not implemented in gnulib yet */
+pthread_barrier_t t12;
+pthread_barrierattr_t t13;
+#endif
+
+/* Check that the various macros are defined.  */
+
+/* Constants for pthread_attr_setdetachstate().  */
+int ds[] = { PTHREAD_CREATE_JOINABLE, PTHREAD_CREATE_DETACHED };
+
+/* Constants for pthread_exit().  */
+void *canceled = PTHREAD_CANCELED;
+
+/* Constants for pthread_mutexattr_settype().  */
+int mt[] = {
+  PTHREAD_MUTEX_DEFAULT,
+  PTHREAD_MUTEX_NORMAL,
+  PTHREAD_MUTEX_RECURSIVE,
+  PTHREAD_MUTEX_ERRORCHECK
+};
+
+#ifdef TODO /* Not implemented in gnulib yet */
+
+/* Constants for pthread_mutexattr_setrobust().  */
+int mr[] = { PTHREAD_MUTEX_ROBUST, PTHREAD_MUTEX_STALLED };
+
+/* Constants for pthread_barrierattr_setpshared().  */
+int bp[] = { PTHREAD_PROCESS_SHARED, PTHREAD_PROCESS_PRIVATE };
+
+/* Constants for pthread_barrier_wait().  */
+int bw[] = { PTHREAD_BARRIER_SERIAL_THREAD };
+
+/* Constants for pthread_setcancelstate().  */
+int cs[] = { PTHREAD_CANCEL_ENABLE, PTHREAD_CANCEL_DISABLE };
+
+/* Constants for pthread_setcanceltype().  */
+int ct[] = { PTHREAD_CANCEL_DEFERRED, PTHREAD_CANCEL_ASYNCHRONOUS };
+
+#endif
+
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-pthread_sigmask1.c b/src/gl/tests/test-pthread_sigmask1.c
new file mode 100644
index 0000000..f12b17c
--- /dev/null
+++ b/src/gl/tests/test-pthread_sigmask1.c
@@ -0,0 +1,95 @@
+/* Test of pthread_sigmask in a single-threaded program.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (pthread_sigmask, int, (int, const sigset_t *, sigset_t *));
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#if !(defined _WIN32 && !defined __CYGWIN__)
+
+static volatile int sigint_occurred;
+
+static void
+sigint_handler (int sig)
+{
+  sigint_occurred++;
+}
+
+int
+main (int argc, char *argv[])
+{
+  sigset_t set;
+  int pid = getpid ();
+  char command[80];
+
+  signal (SIGINT, sigint_handler);
+
+  sigemptyset (&set);
+  sigaddset (&set, SIGINT);
+
+  /* Check error handling.  */
+  ASSERT (pthread_sigmask (1729, &set, NULL) == EINVAL);
+
+  /* Block SIGINT.  */
+  ASSERT (pthread_sigmask (SIG_BLOCK, &set, NULL) == 0);
+
+  /* Request a SIGINT signal from outside.  */
+  sprintf (command, "sh -c 'sleep 1; kill -%d %d' &", SIGINT, pid);
+  ASSERT (system (command) == 0);
+
+  /* Wait.  */
+  sleep (2);
+
+  /* The signal should not have arrived yet, because it is blocked.  */
+  ASSERT (sigint_occurred == 0);
+
+  /* Unblock SIGINT.  */
+  ASSERT (pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0);
+
+  /* The signal should have arrived now, because POSIX says
+       "If there are any pending unblocked signals after the call to
+        pthread_sigmask(), at least one of those signals shall be delivered
+        before the call to pthread_sigmask() returns."  */
+  ASSERT (sigint_occurred == 1);
+
+  return 0;
+}
+
+#else
+
+/* On native Windows, getpid() values and the arguments that are passed to
+   the (Cygwin?) 'kill' program are not necessarily related.  */
+
+int
+main ()
+{
+  fputs ("Skipping test: native Windows platform\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/gl/tests/test-pthread_sigmask2.c b/src/gl/tests/test-pthread_sigmask2.c
new file mode 100644
index 0000000..f57fc93
--- /dev/null
+++ b/src/gl/tests/test-pthread_sigmask2.c
@@ -0,0 +1,105 @@
+/* Test of pthread_sigmask in a multi-threaded program.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS
+
+static pthread_t main_thread;
+static pthread_t killer_thread;
+
+static void *
+killer_thread_func (void *arg)
+{
+  sleep (1);
+  pthread_kill (main_thread, SIGINT);
+  return NULL;
+}
+
+static volatile int sigint_occurred;
+
+static void
+sigint_handler (int sig)
+{
+  sigint_occurred++;
+}
+
+int
+main (int argc, char *argv[])
+{
+  sigset_t set;
+
+  signal (SIGINT, sigint_handler);
+
+  sigemptyset (&set);
+  sigaddset (&set, SIGINT);
+
+  /* Check error handling.  */
+  /* This call returns 0 on NetBSD 8.0.  */
+#if !defined __NetBSD__
+  ASSERT (pthread_sigmask (1729, &set, NULL) == EINVAL);
+#endif
+
+  /* Block SIGINT.  */
+  ASSERT (pthread_sigmask (SIG_BLOCK, &set, NULL) == 0);
+
+  /* Request a SIGINT signal from another thread.  */
+  main_thread = pthread_self ();
+  ASSERT (pthread_create (&killer_thread, NULL, killer_thread_func, NULL) == 0);
+
+  /* Wait.  */
+  sleep (2);
+
+  /* The signal should not have arrived yet, because it is blocked.  */
+  ASSERT (sigint_occurred == 0);
+
+  /* Unblock SIGINT.  */
+  ASSERT (pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0);
+
+  /* The signal should have arrived now, because POSIX says
+       "If there are any pending unblocked signals after the call to
+        pthread_sigmask(), at least one of those signals shall be delivered
+        before the call to pthread_sigmask() returns."  */
+  ASSERT (sigint_occurred == 1);
+
+  /* Clean up the thread.  This avoid a "ThreadSanitizer: thread leak" warning
+     from "gcc -fsanitize=thread".  */
+  ASSERT (pthread_join (killer_thread, NULL) == 0);
+
+  return 0;
+}
+
+#else
+
+int
+main ()
+{
+  fputs ("Skipping test: POSIX threads not enabled\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/gl/tests/test-raise.c b/src/gl/tests/test-raise.c
new file mode 100644
index 0000000..d7fe02b
--- /dev/null
+++ b/src/gl/tests/test-raise.c
@@ -0,0 +1,51 @@
+/* Test raising a signal.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <signal.h>
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (raise, int, (int));
+
+#include <stdlib.h>
+
+#include "macros.h"
+
+/* It is safe to use _Noreturn here: exit() never returns, and GCC knows that
+   exit() is a non-returning function, even on platforms where its declaration
+   in <stdlib.h> does not have the 'noreturn' attribute.  */
+static _Noreturn void
+handler (int sig)
+{
+  _exit (0);
+}
+
+int
+main (void)
+{
+  /* Test behaviour for invalid argument.  */
+  ASSERT (raise (-1) != 0);
+
+  /* Test behaviour for SIGINT.  */
+  ASSERT (signal (SIGINT, handler) != SIG_ERR);
+
+  raise (SIGINT);
+
+  /* We should not get here, because the handler takes away the control.  */
+  exit (1);
+}
diff --git a/src/gl/tests/test-read-file.c b/src/gl/tests/test-read-file.c
new file mode 100644
index 0000000..b63c25b
--- /dev/null
+++ b/src/gl/tests/test-read-file.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2006-2007, 2010-2021 Free Software Foundation, Inc.
+ * Written by Simon Josefsson
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "read-file.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#include "macros.h"
+
+#define FILE1 "/etc/resolv.conf"
+#define FILE2 "/dev/null"
+
+static int
+test_read_file (int flags)
+{
+  struct stat statbuf;
+  int err = 0;
+
+  /* We can perform the test only if the file exists and is readable.
+     Test whether it exists, then assume it is world-readable.  */
+  if (stat (FILE1, &statbuf) >= 0)
+    {
+      size_t len;
+      char *out = read_file (FILE1, flags, &len);
+
+      if (!out)
+        {
+          perror ("Could not read file");
+          err = 1;
+        }
+      else
+        {
+          if (out[len] != '\0')
+            {
+              perror ("BAD: out[len] not zero");
+              err = 1;
+            }
+
+          if (S_ISREG (statbuf.st_mode))
+            {
+              /* FILE1 is a regular file or a symlink to a regular file.  */
+              if (len != statbuf.st_size)
+                {
+                  fprintf (stderr, "Read %lu from %s...\n",
+                           (unsigned long) len, FILE1);
+                  err = 1;
+                }
+            }
+          else
+            {
+              /* Assume FILE1 is not empty.  */
+              if (len == 0)
+                {
+                  fprintf (stderr, "Read nothing from %s\n", FILE1);
+                  err = 1;
+                }
+            }
+          free (out);
+        }
+    }
+
+  /* We can perform the test only if the file exists and is readable.
+     Test whether it exists, then assume it is world-readable.  */
+  if (stat (FILE2, &statbuf) >= 0)
+    {
+      size_t len;
+      char *out = read_file (FILE2, flags, &len);
+
+      if (!out)
+        {
+          perror ("Could not read file");
+          err = 1;
+        }
+      else
+        {
+          if (out[len] != '\0')
+            {
+              perror ("BAD: out[len] not zero");
+              err = 1;
+            }
+
+          /* /dev/null should always be empty.  Ignore statbuf.st_size, since it
+             is not a regular file.  */
+          if (len != 0)
+            {
+              fprintf (stderr, "Read %lu from %s...\n",
+                       (unsigned long) len, FILE2);
+              err = 1;
+            }
+          free (out);
+        }
+    }
+
+  return err;
+}
+
+int
+main (void)
+{
+  ASSERT (!test_read_file (0));
+  ASSERT (!test_read_file (RF_BINARY));
+  ASSERT (!test_read_file (RF_SENSITIVE));
+  ASSERT (!test_read_file (RF_BINARY | RF_SENSITIVE));
+
+  return 0;
+}
diff --git a/src/gl/tests/test-realloc-gnu.c b/src/gl/tests/test-realloc-gnu.c
new file mode 100644
index 0000000..6f98be0
--- /dev/null
+++ b/src/gl/tests/test-realloc-gnu.c
@@ -0,0 +1,49 @@
+/* Test of realloc function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <stdint.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv)
+{
+  /* Check that realloc (NULL, 0) is not a NULL pointer.  */
+  void *volatile p = realloc (NULL, 0);
+  ASSERT (p != NULL);
+
+  /* Check that realloc (p, n) fails when p is non-null and n exceeds
+     PTRDIFF_MAX.  */
+  if (PTRDIFF_MAX < SIZE_MAX)
+    {
+      size_t one = argc != 12345;
+      p = realloc (p, PTRDIFF_MAX + one);
+      ASSERT (p == NULL);
+      /* Avoid a test failure due to glibc bug
+         <https://sourceware.org/bugzilla/show_bug.cgi?id=27870>.  */
+      if (!getenv ("MALLOC_CHECK_"))
+        ASSERT (errno == ENOMEM);
+    }
+
+  free (p);
+  return 0;
+}
diff --git a/src/gl/tests/test-reallocarray.c b/src/gl/tests/test-reallocarray.c
new file mode 100644
index 0000000..f0839ff
--- /dev/null
+++ b/src/gl/tests/test-reallocarray.c
@@ -0,0 +1,55 @@
+/* Test of reallocarray function.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdlib.h>
+
+#include <errno.h>
+#include <stdint.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (reallocarray, void *, (void *, size_t, size_t));
+
+#include "macros.h"
+
+int
+main ()
+{
+  /* Check that reallocarray fails when requested to allocate a block
+     of memory larger than PTRDIFF_MAX or SIZE_MAX bytes.  */
+  for (size_t n = 2; n != 0; n <<= 1)
+    {
+      void *volatile p = NULL;
+
+      p = reallocarray (p, PTRDIFF_MAX / n + 1, n);
+      ASSERT (p == NULL);
+      ASSERT (errno == ENOMEM);
+
+      p = reallocarray (p, SIZE_MAX / n + 1, n);
+      ASSERT (p == NULL);
+      ASSERT (errno == ENOMEM
+              || errno == EOVERFLOW /* NetBSD */);
+
+      /* Reallocarray should not crash with zero sizes.  */
+      p = reallocarray (p, 0, n);
+      p = reallocarray (p, n, 0);
+      free (p);
+    }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-recv.c b/src/gl/tests/test-recv.c
new file mode 100644
index 0000000..a16c4fe
--- /dev/null
+++ b/src/gl/tests/test-recv.c
@@ -0,0 +1,51 @@
+/* Test the recv() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (recv, ssize_t, (int, void *, size_t, int));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    char byte;
+    errno = 0;
+    ASSERT (recv (-1, &byte, 1, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    char byte;
+    close (99);
+    errno = 0;
+    ASSERT (recv (99, &byte, 1, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-recvfrom.c b/src/gl/tests/test-recvfrom.c
new file mode 100644
index 0000000..ac1228b
--- /dev/null
+++ b/src/gl/tests/test-recvfrom.c
@@ -0,0 +1,62 @@
+/* Test the recvfrom() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (recvfrom, ssize_t,
+                 (int, void *, size_t, int,
+                  struct sockaddr *, socklen_t *));
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    char byte;
+    struct sockaddr_in addr;
+    socklen_t addrlen = sizeof (addr);
+
+    errno = 0;
+    ASSERT (recvfrom (-1, &byte, 1, 0, (struct sockaddr *) &addr, &addrlen)
+            == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    char byte;
+    struct sockaddr_in addr;
+    socklen_t addrlen = sizeof (addr);
+
+    close (99);
+    errno = 0;
+    ASSERT (recvfrom (99, &byte, 1, 0, (struct sockaddr *) &addr, &addrlen)
+            == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-rwlock1.c b/src/gl/tests/test-rwlock1.c
new file mode 100644
index 0000000..1539fc7
--- /dev/null
+++ b/src/gl/tests/test-rwlock1.c
@@ -0,0 +1,170 @@
+/* Test of glthread_rwlock_rdlock function.
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Inspired by
+   https://github.com/linux-test-project/ltp/blob/master/testcases/open_posix_testsuite/conformance/interfaces/pthread_rwlock_rdlock/2-2.c
+   by Intel Corporation.  */
+
+#include <config.h>
+
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+
+#include "glthread/lock.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "glthread/thread.h"
+
+/* Verify that in a situation where
+     - an rwlock is taken by a reader and has a writer waiting,
+     - an additional reader requests the lock,
+     - the waiting writer and the requesting reader threads have the same
+       priority,
+   the requesting reader thread gets blocked, so that at some point the
+   waiting writer can acquire the lock.
+   Without such a guarantee, when there a N readers and each of the readers
+   spends more than 1/Nth of the time with the lock held, there is a high
+   probability that the waiting writer will not get the lock in a given finite
+   time, a phenomenon called "writer starvation".
+   Without such a guarantee, applications have a hard time avoiding writer
+   starvation.
+
+   POSIX:2008 makes this requirement only for implementations that support TPS
+   (Thread Priority Scheduling) and only for the scheduling policies SCHED_FIFO
+   and SCHED_RR, see
+   https://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_rwlock_rdlock.html
+   but test verifies the guarantee regardless of TPS and regardless of
+   scheduling policy.  */
+
+#define SUCCEED() exit (0)
+#define FAILURE() exit (1)
+#define UNEXPECTED(n) (fprintf (stderr, "Unexpected outcome %d\n", n), abort ())
+
+/* The main thread creates the waiting writer and the requesting reader threads
+   in the default way; this guarantees that they have the same priority.
+   We can reuse the main thread as first reader thread.  */
+
+static gl_rwlock_t lock;
+static gl_thread_t reader1;
+static gl_thread_t writer;
+static gl_thread_t reader2;
+static gl_thread_t timer;
+/* Used to pass control from writer to reader2 and from reader2 to timer,
+   as in a relay race.
+   Passing control from one running thread to another running thread
+   is most likely faster than to create the second thread.  */
+static gl_lock_t baton;
+
+static void *
+timer_func (void *ignored)
+{
+  /* Step 13 (can be before or after step 12):
+     The timer thread takes the baton, then waits a moment to make sure
+     it can tell whether the second reader thread is blocked at step 12.  */
+  if (glthread_lock_lock (&baton))
+    UNEXPECTED (13);
+  usleep (100000);
+  /* By the time we get here, it's clear that the second reader thread is
+     blocked at step 12.  This is the desired behaviour.  */
+  SUCCEED ();
+}
+
+static void *
+reader2_func (void *ignored)
+{
+  int err;
+
+  /* Step 8 (can be before or after step 7):
+     The second reader thread takes the baton, then waits a moment to make sure
+     the writer thread has reached step 7.  */
+  if (glthread_lock_lock (&baton))
+    UNEXPECTED (8);
+  usleep (100000);
+  /* Step 9 omitted.  */
+  /* Step 10: Launch a timer, to test whether the next call blocks.  */
+  if (glthread_create (&timer, timer_func, NULL))
+    UNEXPECTED (10);
+  /* Step 11: Release the baton.  */
+  if (glthread_lock_unlock (&baton))
+    UNEXPECTED (11);
+  /* Step 12: The second reader thread requests the lock.  */
+  err = glthread_rwlock_rdlock (&lock);
+  if (err == 0)
+    FAILURE ();
+  else
+    UNEXPECTED (12);
+}
+
+static void *
+writer_func (void *ignored)
+{
+  /* Step 4: Take the baton, so that the second reader thread does not go ahead
+     too early.  */
+  if (glthread_lock_lock (&baton))
+    UNEXPECTED (4);
+  /* Step 5: Create the second reader thread.  */
+  if (glthread_create (&reader2, reader2_func, NULL))
+    UNEXPECTED (5);
+  /* Step 6: Release the baton.  */
+  if (glthread_lock_unlock (&baton))
+    UNEXPECTED (6);
+  /* Step 7: The writer thread requests the lock.  */
+  if (glthread_rwlock_wrlock (&lock))
+    UNEXPECTED (7);
+  return NULL;
+}
+
+int
+main ()
+{
+  reader1 = gl_thread_self ();
+
+  /* Step 1: The main thread initializes the lock and the baton.  */
+  if (glthread_rwlock_init (&lock))
+    UNEXPECTED (1);
+  if (glthread_lock_init (&baton))
+    UNEXPECTED (1);
+  /* Step 2: The main thread acquires the lock as a reader.  */
+  if (glthread_rwlock_rdlock (&lock))
+    UNEXPECTED (2);
+  /* Step 3: Create the writer thread.  */
+  if (glthread_create (&writer, writer_func, NULL))
+    UNEXPECTED (3);
+  /* Job done.  Go to sleep.  */
+  for (;;)
+    {
+      sleep (1);
+    }
+}
+
+#else
+
+/* No multithreading available.  */
+
+#include <stdio.h>
+
+int
+main ()
+{
+  fputs ("Skipping test: multithreading not enabled\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/gl/tests/test-sched.c b/src/gl/tests/test-sched.c
new file mode 100644
index 0000000..f3c4195
--- /dev/null
+++ b/src/gl/tests/test-sched.c
@@ -0,0 +1,41 @@
+/* Test of <sched.h> substitute.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <sched.h>
+
+/* Check that 'struct sched_param' is defined.  */
+static struct sched_param a;
+
+/* Check that the SCHED_* macros are defined and compile-time constants.  */
+int b[] = { SCHED_FIFO, SCHED_RR, SCHED_OTHER };
+
+/* Check that the types are all defined.  */
+pid_t t1;
+
+static int f1;
+
+int
+main ()
+{
+  /* Check fields of 'struct sched_param'.  */
+  f1 = a.sched_priority;
+
+  return 0;
+}
diff --git a/src/gl/tests/test-select-fd.c b/src/gl/tests/test-select-fd.c
new file mode 100644
index 0000000..229e821
--- /dev/null
+++ b/src/gl/tests/test-select-fd.c
@@ -0,0 +1,72 @@
+/* Test of select() substitute, reading or writing from a given file descriptor.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/select.h>
+
+int
+main (int argc, char *argv[])
+{
+  if (argc == 4)
+    {
+      char mode = argv[1][0];
+
+      if (mode == 'r' || mode == 'w')
+        {
+          int fd = atoi (argv[2]);
+
+          if (fd >= 0)
+            {
+              const char *result_file_name = argv[3];
+              FILE *result_file = fopen (result_file_name, "wb");
+
+              if (result_file != NULL)
+                {
+                  fd_set fds;
+                  struct timeval timeout;
+                  int ret;
+
+                  FD_ZERO (&fds);
+                  FD_SET (fd, &fds);
+                  timeout.tv_sec = 0;
+                  timeout.tv_usec = 10000;
+                  ret = (mode == 'r'
+                         ? select (fd + 1, &fds, NULL, NULL, &timeout)
+                         : select (fd + 1, NULL, &fds, NULL, &timeout));
+                  if (ret < 0)
+                    {
+                      perror ("select failed");
+                      exit (1);
+                    }
+                  if ((ret == 0) != ! FD_ISSET (fd, &fds))
+                    {
+                      fprintf (stderr, "incorrect return value\n");
+                      exit (1);
+                    }
+                  fprintf (result_file, "%d\n", ret);
+                  exit (0);
+                }
+            }
+        }
+    }
+  fprintf (stderr, "Usage: test-select-fd mode fd result-file-name\n");
+  exit (1);
+}
diff --git a/src/gl/tests/test-select-in.sh b/src/gl/tests/test-select-in.sh
new file mode 100755
index 0000000..68176d3
--- /dev/null
+++ b/src/gl/tests/test-select-in.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+# Test select() on file descriptors opened for reading.
+
+# This test is known to fail on Solaris 2.6 and older, due to its handling
+# of /dev/null.
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="$tmpfiles t-select-in.tmp"
+
+# Regular files.
+
+rm -f t-select-in.tmp
+${CHECKER} ./test-select-fd${EXEEXT} r 0 t-select-in.tmp < ./test-select-fd${EXEEXT}
+test `cat t-select-in.tmp` = "1" || exit 1
+
+# Pipes.
+
+rm -f t-select-in.tmp
+{ sleep 1; echo abc; } | \
+  { ${CHECKER} ./test-select-fd${EXEEXT} r 0 t-select-in.tmp; cat > /dev/null; }
+test `cat t-select-in.tmp` = "0" || exit 1
+
+rm -f t-select-in.tmp
+echo abc | { sleep 1; ${CHECKER} ./test-select-fd${EXEEXT} r 0 t-select-in.tmp; }
+test `cat t-select-in.tmp` = "1" || exit 1
+
+# Special files.
+# This part of the test is known to fail on Solaris 2.6 and older.
+
+rm -f t-select-in.tmp
+${CHECKER} ./test-select-fd${EXEEXT} r 0 t-select-in.tmp < /dev/null
+test `cat t-select-in.tmp` = "1" || exit 1
+
+rm -fr $tmpfiles
+
+exit 0
diff --git a/src/gl/tests/test-select-out.sh b/src/gl/tests/test-select-out.sh
new file mode 100755
index 0000000..dbeace5
--- /dev/null
+++ b/src/gl/tests/test-select-out.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+# Test select() on file descriptors opened for writing.
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="$tmpfiles t-select-out.out t-select-out.tmp"
+
+# Regular files.
+
+rm -f t-select-out.tmp
+${CHECKER} ./test-select-fd${EXEEXT} w 1 t-select-out.tmp > t-select-out.out
+test `cat t-select-out.tmp` = "1" || exit 1
+
+# Pipes.
+
+if false; then # This test fails on some platforms.
+  rm -f t-select-out.tmp
+  ( { echo abc; ${CHECKER} ./test-select-fd${EXEEXT} w 1 t-select-out.tmp; } | { sleep 1; cat; } ) > /dev/null
+  test `cat t-select-out.tmp` = "0" || exit 1
+fi
+
+rm -f t-select-out.tmp
+( { sleep 1; echo abc; ${CHECKER} ./test-select-fd${EXEEXT} w 1 t-select-out.tmp; } | cat) > /dev/null
+test `cat t-select-out.tmp` = "1" || exit 1
+
+# Special files.
+
+rm -f t-select-out.tmp
+${CHECKER} ./test-select-fd${EXEEXT} w 1 t-select-out.tmp > /dev/null
+test `cat t-select-out.tmp` = "1" || exit 1
+
+rm -fr $tmpfiles
+
+exit 0
diff --git a/src/gl/tests/test-select-stdin.c b/src/gl/tests/test-select-stdin.c
new file mode 100644
index 0000000..26ca8a8
--- /dev/null
+++ b/src/gl/tests/test-select-stdin.c
@@ -0,0 +1,83 @@
+/* Test of select() substitute, reading from stdin.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  printf ("Applying select() from standard input. Press Ctrl-C to abort.\n");
+  for (;;)
+    {
+      struct timeval before;
+      struct timeval after;
+      unsigned long spent_usec;
+      fd_set readfds;
+      struct timeval timeout;
+      int ret;
+
+      gettimeofday (&before, NULL);
+
+      FD_ZERO (&readfds);
+      FD_SET (0, &readfds);
+      timeout.tv_sec = 0;
+      timeout.tv_usec = 500000;
+      ret = select (1, &readfds, NULL, NULL, &timeout);
+
+      gettimeofday (&after, NULL);
+      spent_usec = (after.tv_sec - before.tv_sec) * 1000000
+                   + after.tv_usec - before.tv_usec;
+
+      if (ret < 0)
+        {
+          perror ("select failed");
+          exit (1);
+        }
+      if ((ret == 0) != ! FD_ISSET (0, &readfds))
+        {
+          fprintf (stderr, "incorrect return value\n");
+          exit (1);
+        }
+      if (ret == 0)
+        {
+          if (spent_usec < 250000)
+            {
+              fprintf (stderr, "returned too early\n");
+              exit (1);
+            }
+          /* Timeout */
+          printf (".");
+          ASSERT (fflush (stdout) == 0);
+        }
+      else
+        {
+          char c;
+
+          printf ("Input available! Trying to read 1 byte...\n");
+          ASSERT (read (0, &c, 1) == 1);
+        }
+    }
+}
diff --git a/src/gl/tests/test-select.c b/src/gl/tests/test-select.c
new file mode 100644
index 0000000..a4ff8d1
--- /dev/null
+++ b/src/gl/tests/test-select.c
@@ -0,0 +1,34 @@
+/* Test of select() substitute.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini, 2008.  */
+
+#include <config.h>
+
+#include <sys/select.h>
+
+#include "signature.h"
+
+SIGNATURE_CHECK (select, int, (int, fd_set *, fd_set *, fd_set *,
+                               struct timeval *));
+
+#include "test-select.h"
+
+int
+main (void)
+{
+  return test_function (select);
+}
diff --git a/src/gl/tests/test-select.h b/src/gl/tests/test-select.h
new file mode 100644
index 0000000..6348a49
--- /dev/null
+++ b/src/gl/tests/test-select.h
@@ -0,0 +1,466 @@
+/* Test of select() substitute.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini, 2008.  */
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+
+#include "macros.h"
+
+#if defined _WIN32 && ! defined __CYGWIN__
+# define WINDOWS_NATIVE
+#endif
+
+#ifdef HAVE_SYS_WAIT_H
+# include <sys/wait.h>
+#endif
+
+#define TEST_PORT       12345
+
+
+typedef int (*select_fn) (int, fd_set *, fd_set *, fd_set *, struct timeval *);
+
+
+/* Minimal testing infrastructure.  */
+
+static int failures;
+
+static void
+failed (const char *reason)
+{
+  if (++failures > 1)
+    printf ("  ");
+  printf ("failed (%s)\n", reason);
+}
+
+static int
+test (void (*fn) (select_fn), select_fn my_select, const char *msg)
+{
+  failures = 0;
+  printf ("%s... ", msg);
+  fflush (stdout);
+  fn (my_select);
+
+  if (!failures)
+    printf ("passed\n");
+
+  return failures;
+}
+
+
+/* Funny socket code.  */
+
+static int
+open_server_socket (void)
+{
+  int s, x;
+  struct sockaddr_in ia;
+
+  s = socket (AF_INET, SOCK_STREAM, 0);
+
+  x = 1;
+  setsockopt (s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof (x));
+
+  memset (&ia, 0, sizeof (ia));
+  ia.sin_family = AF_INET;
+  inet_pton (AF_INET, "127.0.0.1", &ia.sin_addr);
+  ia.sin_port = htons (TEST_PORT);
+  if (bind (s, (struct sockaddr *) &ia, sizeof (ia)) < 0)
+    {
+      perror ("bind");
+      exit (77);
+    }
+
+  if (listen (s, 1) < 0)
+    {
+      perror ("listen");
+      exit (77);
+    }
+
+  return s;
+}
+
+static int
+connect_to_socket (bool blocking)
+{
+  int s;
+  struct sockaddr_in ia;
+
+  s = socket (AF_INET, SOCK_STREAM, 0);
+
+  memset (&ia, 0, sizeof (ia));
+  ia.sin_family = AF_INET;
+  inet_pton (AF_INET, "127.0.0.1", &ia.sin_addr);
+  ia.sin_port = htons (TEST_PORT);
+
+  if (!blocking)
+    {
+#ifdef WINDOWS_NATIVE
+      unsigned long iMode = 1;
+      ioctl (s, FIONBIO, (char *) &iMode);
+
+#elif defined F_GETFL
+      int oldflags = fcntl (s, F_GETFL, NULL);
+
+      if (!(oldflags & O_NONBLOCK))
+        fcntl (s, F_SETFL, oldflags | O_NONBLOCK);
+#endif
+    }
+
+  if (connect (s, (struct sockaddr *) &ia, sizeof (ia)) < 0
+      && (blocking || errno != EINPROGRESS))
+    {
+      perror ("connect");
+      exit (77);
+    }
+
+  return s;
+}
+
+
+/* A slightly more convenient interface to select(2).
+   Waits until a specific event occurs on a file descriptor FD.
+   EV is a bit mask of events to look for:
+     SEL_IN - input can be polled without blocking,
+     SEL_OUT - output can be provided without blocking,
+     SEL_EXC - an exception occurred,
+   A maximum wait time is specified by TIMEOUT.
+   *TIMEOUT = { 0, 0 } means to return immediately,
+   TIMEOUT = NULL means to wait indefinitely.  */
+
+enum { SEL_IN = 1, SEL_OUT = 2, SEL_EXC = 4 };
+
+static int
+do_select (int fd, int ev, struct timeval *timeout, select_fn my_select)
+{
+  fd_set rfds, wfds, xfds;
+  int r, rev;
+
+  FD_ZERO (&rfds);
+  FD_ZERO (&wfds);
+  FD_ZERO (&xfds);
+  if (ev & SEL_IN)
+    FD_SET (fd, &rfds);
+  if (ev & SEL_OUT)
+    FD_SET (fd, &wfds);
+  if (ev & SEL_EXC)
+    FD_SET (fd, &xfds);
+  r = my_select (fd + 1, &rfds, &wfds, &xfds, timeout);
+  if (r < 0)
+    return r;
+
+  rev = 0;
+  if (FD_ISSET (fd, &rfds))
+    rev |= SEL_IN;
+  if (FD_ISSET (fd, &wfds))
+    rev |= SEL_OUT;
+  if (FD_ISSET (fd, &xfds))
+    rev |= SEL_EXC;
+  if (rev && r == 0)
+    failed ("select returned 0");
+  if (rev & ~ev)
+    failed ("select returned unrequested events");
+
+  return rev;
+}
+
+static int
+do_select_nowait (int fd, int ev, select_fn my_select)
+{
+  struct timeval tv0;
+  tv0.tv_sec = 0;
+  tv0.tv_usec = 0;
+  return do_select (fd, ev, &tv0, my_select);
+}
+
+static int
+do_select_wait (int fd, int ev, select_fn my_select)
+{
+  return do_select (fd, ev, NULL, my_select);
+}
+
+
+/* Test select(2) for TTYs.  */
+
+#ifdef INTERACTIVE
+static void
+test_tty (select_fn my_select)
+{
+  if (do_select_nowait (0, SEL_IN, my_select) != 0)
+    failed ("can read");
+  if (do_select_nowait (0, SEL_OUT, my_select) == 0)
+    failed ("cannot write");
+
+  if (do_select_wait (0, SEL_IN, my_select) == 0)
+    failed ("return with infinite timeout");
+
+  getchar ();
+  if (do_select_nowait (0, SEL_IN, my_select) != 0)
+    failed ("can read after getc");
+}
+#endif
+
+
+static int
+do_select_bad_nfd_nowait (int nfd, select_fn my_select)
+{
+  struct timeval tv0;
+  tv0.tv_sec = 0;
+  tv0.tv_usec = 0;
+  errno = 0;
+  return my_select (nfd, NULL, NULL, NULL, &tv0);
+}
+
+static void
+test_bad_nfd (select_fn my_select)
+{
+  if (do_select_bad_nfd_nowait (-1, my_select) != -1 || errno != EINVAL)
+    failed ("invalid errno after negative nfds");
+  /* Can't test FD_SETSIZE + 1 for EINVAL, since some systems allow
+     dynamically larger set size by redefining FD_SETSIZE anywhere up
+     to the actual maximum fd.  */
+#if 0
+  if (do_select_bad_nfd_nowait (FD_SETSIZE + 1, my_select) != -1
+      || errno != EINVAL)
+    failed ("invalid errno after bogus nfds");
+#endif
+}
+
+/* Test select(2) on invalid file descriptors.  */
+
+static int
+do_select_bad_fd (int fd, int ev, struct timeval *timeout, select_fn my_select)
+{
+  fd_set rfds, wfds, xfds;
+
+  FD_ZERO (&rfds);
+  FD_ZERO (&wfds);
+  FD_ZERO (&xfds);
+  if (ev & SEL_IN)
+    FD_SET (fd, &rfds);
+  if (ev & SEL_OUT)
+    FD_SET (fd, &wfds);
+  if (ev & SEL_EXC)
+    FD_SET (fd, &xfds);
+  errno = 0;
+  return my_select (fd + 1, &rfds, &wfds, &xfds, timeout);
+  /* In this case, when fd is invalid, on some platforms, the bit for fd
+     is left alone in the fd_set, whereas on other platforms it is cleared.
+     So, don't check the bit for fd here.  */
+}
+
+static int
+do_select_bad_fd_nowait (int fd, int ev, select_fn my_select)
+{
+  struct timeval tv0;
+  tv0.tv_sec = 0;
+  tv0.tv_usec = 0;
+  return do_select_bad_fd (fd, ev, &tv0, my_select);
+}
+
+static void
+test_bad_fd (select_fn my_select)
+{
+  /* This tests fails on OSF/1 and native Windows, even with fd = 16.  */
+#if !(defined __osf__ || defined WINDOWS_NATIVE)
+  int fd;
+
+  /* On Linux, Mac OS X, *BSD, values of fd like 99 or 399 are discarded
+     by the kernel early and therefore do *not* lead to EBADF, as required
+     by POSIX.  */
+# if defined __linux__ || (defined __APPLE__ && defined __MACH__) || (defined __FreeBSD__ || defined __DragonFly__) || defined __OpenBSD__ || defined __NetBSD__
+  fd = 14;
+# else
+  fd = 99;
+# endif
+  /* Even on the best POSIX compliant platforms, values of fd >= FD_SETSIZE
+     require an nfds argument that is > FD_SETSIZE and thus may lead to EINVAL,
+     not EBADF.  */
+  if (fd >= FD_SETSIZE)
+    fd = FD_SETSIZE - 1;
+  close (fd);
+
+  if (do_select_bad_fd_nowait (fd, SEL_IN, my_select) == 0 || errno != EBADF)
+    failed ("invalid fd among rfds");
+  if (do_select_bad_fd_nowait (fd, SEL_OUT, my_select) == 0 || errno != EBADF)
+    failed ("invalid fd among wfds");
+  if (do_select_bad_fd_nowait (fd, SEL_EXC, my_select) == 0 || errno != EBADF)
+    failed ("invalid fd among xfds");
+#endif
+}
+
+
+/* Test select(2) for unconnected nonblocking sockets.  */
+
+static void
+test_connect_first (select_fn my_select)
+{
+  int s = open_server_socket ();
+  struct sockaddr_in ia;
+  socklen_t addrlen;
+
+  int c1, c2;
+
+  if (do_select_nowait (s, SEL_IN | SEL_EXC, my_select) != 0)
+    failed ("can read, socket not connected");
+
+  c1 = connect_to_socket (false);
+
+  if (do_select_wait (s, SEL_IN | SEL_EXC, my_select) != SEL_IN)
+    failed ("expecting readability on passive socket");
+  if (do_select_nowait (s, SEL_IN | SEL_EXC, my_select) != SEL_IN)
+    failed ("expecting readability on passive socket");
+
+  addrlen = sizeof (ia);
+  c2 = accept (s, (struct sockaddr *) &ia, &addrlen);
+  ASSERT (close (s) == 0);
+  ASSERT (close (c1) == 0);
+  ASSERT (close (c2) == 0);
+}
+
+
+/* Test select(2) for unconnected blocking sockets.  */
+
+static void
+test_accept_first (select_fn my_select)
+{
+#ifndef WINDOWS_NATIVE
+  int s = open_server_socket ();
+  struct sockaddr_in ia;
+  socklen_t addrlen;
+  char buf[3];
+  int c, pid;
+
+  pid = fork ();
+  if (pid < 0)
+    return;
+
+  if (pid == 0)
+    {
+      addrlen = sizeof (ia);
+      c = accept (s, (struct sockaddr *) &ia, &addrlen);
+      ASSERT (close (s) == 0);
+      ASSERT (write (c, "foo", 3) == 3);
+      ASSERT (read (c, buf, 3) == 3);
+      shutdown (c, SHUT_RD);
+      ASSERT (close (c) == 0);
+      exit (0);
+    }
+  else
+    {
+      ASSERT (close (s) == 0);
+      c = connect_to_socket (true);
+      if (do_select_nowait (c, SEL_OUT, my_select) != SEL_OUT)
+        failed ("cannot write after blocking connect");
+      ASSERT (write (c, "foo", 3) == 3);
+      wait (&pid);
+      if (do_select_wait (c, SEL_IN, my_select) != SEL_IN)
+        failed ("cannot read data left in the socket by closed process");
+      ASSERT (read (c, buf, 3) == 3);
+      ASSERT (write (c, "foo", 3) == 3);
+      (void) close (c); /* may fail with errno = ECONNRESET */
+    }
+#endif
+}
+
+
+/* Common code for pipes and connected sockets.  */
+
+static void
+test_pair (int rd, int wd, select_fn my_select)
+{
+  char buf[3];
+  if (do_select_wait (wd, SEL_IN | SEL_OUT | SEL_EXC, my_select) != SEL_OUT)
+    failed ("expecting writability before writing");
+  if (do_select_nowait (wd, SEL_IN | SEL_OUT | SEL_EXC, my_select) != SEL_OUT)
+    failed ("expecting writability before writing");
+
+  ASSERT (write (wd, "foo", 3) == 3);
+  if (do_select_wait (rd, SEL_IN, my_select) != SEL_IN)
+    failed ("expecting readability after writing");
+  if (do_select_nowait (rd, SEL_IN, my_select) != SEL_IN)
+    failed ("expecting readability after writing");
+
+  ASSERT (read (rd, buf, 3) == 3);
+}
+
+
+/* Test select(2) on connected sockets.  */
+
+static void
+test_socket_pair (select_fn my_select)
+{
+  struct sockaddr_in ia;
+
+  socklen_t addrlen = sizeof (ia);
+  int s = open_server_socket ();
+  int c1 = connect_to_socket (false);
+  int c2 = accept (s, (struct sockaddr *) &ia, &addrlen);
+
+  ASSERT (close (s) == 0);
+
+  test_pair (c1, c2, my_select);
+  ASSERT (close (c1) == 0);
+  ASSERT (write (c2, "foo", 3) == 3);
+  (void) close (c2); /* may fail with errno = ECONNRESET */
+}
+
+
+/* Test select(2) on pipes.  */
+
+static void
+test_pipe (select_fn my_select)
+{
+  int fd[2];
+
+  ASSERT (pipe (fd) == 0);
+  test_pair (fd[0], fd[1], my_select);
+  ASSERT (close (fd[0]) == 0);
+  ASSERT (close (fd[1]) == 0);
+}
+
+
+/* Do them all.  */
+
+static int
+test_function (select_fn my_select)
+{
+  int result = 0;
+
+#ifdef INTERACTIVE
+  printf ("Please press Enter\n");
+  test (test_tty, "TTY", my_select);
+#endif
+
+  result += test (test_bad_nfd, my_select, "Invalid nfd test");
+  result += test (test_bad_fd, my_select, "Invalid fd test");
+  result += test (test_connect_first, my_select, "Unconnected socket test");
+  result += test (test_socket_pair, my_select, "Connected sockets test");
+  result += test (test_accept_first, my_select, "General socket test with fork");
+  result += test (test_pipe, my_select, "Pipe test");
+
+  return result;
+}
diff --git a/src/gl/tests/test-send.c b/src/gl/tests/test-send.c
new file mode 100644
index 0000000..8950f42
--- /dev/null
+++ b/src/gl/tests/test-send.c
@@ -0,0 +1,51 @@
+/* Test the send() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (send, ssize_t, (int, const void *, size_t, int));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    char byte = 'x';
+    errno = 0;
+    ASSERT (send (-1, &byte, 1, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    char byte = 'x';
+    close (99);
+    errno = 0;
+    ASSERT (send (99, &byte, 1, 0) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-sendto.c b/src/gl/tests/test-sendto.c
new file mode 100644
index 0000000..54da1f4
--- /dev/null
+++ b/src/gl/tests/test-sendto.c
@@ -0,0 +1,66 @@
+/* Test the sendto() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (sendto, ssize_t,
+                 (int, const void *, size_t, int,
+                  const struct sockaddr *, socklen_t));
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    struct sockaddr_in addr;
+
+    addr.sin_family = AF_INET;
+    inet_pton (AF_INET, "127.0.0.1", &addr.sin_addr);
+    addr.sin_port = htons (80);
+    {
+      char byte = 'x';
+      errno = 0;
+      ASSERT (sendto (-1, &byte, 1, 0,
+                      (const struct sockaddr *) &addr, sizeof (addr))
+              == -1);
+      ASSERT (errno == EBADF);
+    }
+    {
+      char byte = 'x';
+      close (99);
+      errno = 0;
+      ASSERT (sendto (99, &byte, 1, 0,
+                      (const struct sockaddr *) &addr, sizeof (addr))
+              == -1);
+      ASSERT (errno == EBADF);
+    }
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-setenv.c b/src/gl/tests/test-setenv.c
new file mode 100644
index 0000000..034a7d2
--- /dev/null
+++ b/src/gl/tests/test-setenv.c
@@ -0,0 +1,56 @@
+/* Tests of setenv.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (setenv, int, (char const *, char const *, int));
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Test overwriting.  */
+  ASSERT (setenv ("a", "==", -1) == 0);
+  ASSERT (setenv ("a", "2", 0) == 0);
+  ASSERT (strcmp (getenv ("a"), "==") == 0);
+
+  /* Required to fail with EINVAL.  */
+  errno = 0;
+  ASSERT (setenv ("", "", 1) == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (setenv ("a=b", "", 0) == -1);
+  ASSERT (errno == EINVAL);
+#if 0
+  /* glibc and gnulib's implementation guarantee this, but POSIX no
+     longer requires it: http://austingroupbugs.net/view.php?id=185  */
+  errno = 0;
+  ASSERT (setenv (NULL, "", 0) == -1);
+  ASSERT (errno == EINVAL);
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-setlocale1.c b/src/gl/tests/test-setlocale1.c
new file mode 100644
index 0000000..f7897c1
--- /dev/null
+++ b/src/gl/tests/test-setlocale1.c
@@ -0,0 +1,64 @@
+/* Test of setting the current locale.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <locale.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (setlocale, char *, (int, const char *));
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  char *name1;
+  char *name2;
+
+  /* Try to set the locale by implicitly looking at the LC_ALL environment
+     variable.
+     configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, "") == NULL)
+    return 1;
+
+  name1 = strdup (setlocale (LC_ALL, NULL));
+
+  /* Reset the locale.  */
+  if (setlocale (LC_ALL, "C") == NULL)
+    return 1;
+
+  /* Try to set the locale by explicitly looking at the LC_ALL environment
+     variable.
+     configure should already have checked that the locale is supported.  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL)
+    return 1;
+
+  name2 = strdup (setlocale (LC_ALL, NULL));
+
+  ASSERT (name1);
+  ASSERT (name2);
+
+  /* Test that the two results are the same.  */
+  ASSERT (strcmp (name1, name2) == 0);
+  free (name1);
+  free (name2);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-setlocale1.sh b/src/gl/tests/test-setlocale1.sh
new file mode 100755
index 0000000..53ad09f
--- /dev/null
+++ b/src/gl/tests/test-setlocale1.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+
+: ${LOCALE_FR=fr_FR}
+: ${LOCALE_FR_UTF8=fr_FR.UTF-8}
+: ${LOCALE_JA=ja_JP}
+: ${LOCALE_ZH_CN=zh_CN.GB18030}
+
+if test $LOCALE_FR = none && test $LOCALE_FR_UTF8 = none \
+   && test $LOCALE_JA = none && test $LOCALE_ZH_CN = none; then
+  if test -f /usr/bin/localedef; then
+    echo "Skipping test: no locale for testing is installed"
+  else
+    echo "Skipping test: no locale for testing is supported"
+  fi
+  exit 77
+fi
+
+if test $LOCALE_FR != none; then
+  LC_ALL=$LOCALE_FR      ${CHECKER} ./test-setlocale1${EXEEXT} || exit 1
+fi
+
+if test $LOCALE_FR_UTF8 != none; then
+  LC_ALL=$LOCALE_FR_UTF8 ${CHECKER} ./test-setlocale1${EXEEXT} || exit 1
+fi
+
+if test $LOCALE_JA != none; then
+  LC_ALL=$LOCALE_JA      ${CHECKER} ./test-setlocale1${EXEEXT} || exit 1
+fi
+
+if test $LOCALE_ZH_CN != none; then
+  LC_ALL=$LOCALE_ZH_CN   ${CHECKER} ./test-setlocale1${EXEEXT} || exit 1
+fi
+
+exit 0
diff --git a/src/gl/tests/test-setlocale2.c b/src/gl/tests/test-setlocale2.c
new file mode 100644
index 0000000..ecb890b
--- /dev/null
+++ b/src/gl/tests/test-setlocale2.c
@@ -0,0 +1,55 @@
+/* Test of setting the current locale.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <locale.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+main ()
+{
+  /* Try to set the locale by implicitly looking at the LC_ALL environment
+     variable.  */
+  if (setlocale (LC_ALL, "") != NULL)
+    /* It was successful.  Check whether LC_CTYPE is non-trivial.  */
+    if (strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+      {
+        fprintf (stderr, "setlocale did not fail for implicit %s\n",
+                 getenv ("LC_ALL"));
+        return 1;
+      }
+
+  /* Reset the locale.  */
+  if (setlocale (LC_ALL, "C") == NULL)
+    return 1;
+
+  /* Try to set the locale by explicitly looking at the LC_ALL environment
+     variable.  */
+  if (setlocale (LC_ALL, getenv ("LC_ALL")) != NULL)
+    /* It was successful.  Check whether LC_CTYPE is non-trivial.  */
+    if (strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
+      {
+        fprintf (stderr, "setlocale did not fail for explicit %s\n",
+                 getenv ("LC_ALL"));
+        return 1;
+      }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-setlocale2.sh b/src/gl/tests/test-setlocale2.sh
new file mode 100755
index 0000000..79ea32f
--- /dev/null
+++ b/src/gl/tests/test-setlocale2.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Test locale names with likely unsupported encoding in Unix syntax.
+for name in ar_SA.ISO-8859-1 fr_FR.CP1251 zh_TW.GB18030 zh_CN.BIG5; do
+  env LC_ALL=$name ${CHECKER} ./test-setlocale2${EXEEXT} 1 || exit 1
+done
+
+# Test locale names with likely unsupported encoding in native Windows syntax.
+for name in "Arabic_Saudi Arabia.1252" "Arabic_Saudi Arabia.65001" \
+            French_France.65001 Japanese_Japan.65001 Turkish_Turkey.65001 \
+            Chinese_Taiwan.65001 Chinese_China.54936 Chinese_China.65001; do
+  # Here we use 'env' to set the LC_ALL environment variable, because on
+  # Solaris 11.0, the /bin/sh refuses to do it for Turkish_Turkey.65001.
+  env LC_ALL="$name" ${CHECKER} ./test-setlocale2${EXEEXT} 1 || exit 1
+done
+
+exit 0
diff --git a/src/gl/tests/test-setlocale_null-mt-all.c b/src/gl/tests/test-setlocale_null-mt-all.c
new file mode 100644
index 0000000..f733036
--- /dev/null
+++ b/src/gl/tests/test-setlocale_null-mt-all.c
@@ -0,0 +1,172 @@
+/* Multithread-safety test for setlocale_null_r (LC_ALL, ...).
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Work around GCC bug 44511.  */
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Wreturn-type"
+#endif
+
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+
+/* Specification.  */
+#include <locale.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "glthread/thread.h"
+
+/* We want to use the system's setlocale() function here, not the gnulib
+   override.  */
+#undef setlocale
+
+
+/* Some common locale names.  */
+
+#if defined _WIN32 && !defined __CYGWIN__
+# define ENGLISH "English_United States"
+# define GERMAN  "German_Germany"
+# define FRENCH  "French_France"
+# define ENCODING ".1252"
+#else
+# define ENGLISH "en_US"
+# define GERMAN  "de_DE"
+# define FRENCH  "fr_FR"
+# if defined __sgi
+#  define ENCODING ".ISO8859-15"
+# elif defined __hpux
+#  define ENCODING ".utf8"
+# else
+#  define ENCODING ".UTF-8"
+# endif
+#endif
+
+static const char LOCALE1[] = ENGLISH ENCODING;
+static const char LOCALE2[] = GERMAN ENCODING;
+static const char LOCALE3[] = FRENCH ENCODING;
+
+static char *expected;
+
+static void *
+thread1_func (void *arg)
+{
+  for (;;)
+    {
+      char buf[SETLOCALE_NULL_ALL_MAX];
+
+      if (setlocale_null_r (LC_ALL, buf, sizeof (buf)))
+        abort ();
+      if (strcmp (expected, buf) != 0)
+        {
+          fprintf (stderr, "thread1 disturbed by thread2!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static void *
+thread2_func (void *arg)
+{
+  for (;;)
+    {
+      char buf[SETLOCALE_NULL_ALL_MAX];
+
+      setlocale_null_r (LC_NUMERIC, buf, sizeof (buf));
+      setlocale_null_r (LC_ALL, buf, sizeof (buf));
+    }
+
+  /*NOTREACHED*/
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (setlocale (LC_ALL, LOCALE1) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE1 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_NUMERIC, LOCALE2) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE2 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_TIME, LOCALE3) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE3 not recognized\n");
+      return 77;
+    }
+
+  expected = strdup (setlocale (LC_ALL, NULL));
+
+  /* Create the two threads.  */
+  gl_thread_create (thread1_func, NULL);
+  gl_thread_create (thread2_func, NULL);
+
+  /* Let them run for 5 seconds.  */
+  {
+    struct timespec duration;
+    duration.tv_sec = 5;
+    duration.tv_nsec = 0;
+
+    nanosleep (&duration, NULL);
+  }
+
+  return 0;
+}
+
+#else
+
+/* No multithreading available.  */
+
+#include <stdio.h>
+
+int
+main ()
+{
+  fputs ("Skipping test: multithreading not enabled\n", stderr);
+  return 77;
+}
+
+#endif
+
+/* Without locking, the results of this test would be:
+glibc                OK
+musl libc            crash < 10 sec
+macOS                crash < 1 sec
+FreeBSD              crash < 1 sec
+NetBSD               crash < 2 sec
+OpenBSD              crash < 1 sec
+AIX                  crash < 2 sec
+HP-UX                OK
+IRIX                 OK
+Solaris 10           OK
+Solaris 11.0         OK
+Solaris 11.4         OK
+Solaris OpenIndiana  OK
+Haiku                crash < 1 sec
+Cygwin               crash < 1 sec
+mingw                OK
+MSVC                 OK (assuming compiler option /MD !)
+*/
diff --git a/src/gl/tests/test-setlocale_null-mt-one.c b/src/gl/tests/test-setlocale_null-mt-one.c
new file mode 100644
index 0000000..5f9b85b
--- /dev/null
+++ b/src/gl/tests/test-setlocale_null-mt-one.c
@@ -0,0 +1,172 @@
+/* Multithread-safety test for setlocale_null_r (LC_xxx, ...).
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Work around GCC bug 44511.  */
+#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Wreturn-type"
+#endif
+
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+
+/* Specification.  */
+#include <locale.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "glthread/thread.h"
+
+/* We want to use the system's setlocale() function here, not the gnulib
+   override.  */
+#undef setlocale
+
+
+/* Some common locale names.  */
+
+#if defined _WIN32 && !defined __CYGWIN__
+# define ENGLISH "English_United States"
+# define GERMAN  "German_Germany"
+# define FRENCH  "French_France"
+# define ENCODING ".1252"
+#else
+# define ENGLISH "en_US"
+# define GERMAN  "de_DE"
+# define FRENCH  "fr_FR"
+# if defined __sgi
+#  define ENCODING ".ISO8859-15"
+# elif defined __hpux
+#  define ENCODING ".utf8"
+# else
+#  define ENCODING ".UTF-8"
+# endif
+#endif
+
+static const char LOCALE1[] = ENGLISH ENCODING;
+static const char LOCALE2[] = GERMAN ENCODING;
+static const char LOCALE3[] = FRENCH ENCODING;
+
+static char *expected;
+
+static void *
+thread1_func (void *arg)
+{
+  for (;;)
+    {
+      char buf[SETLOCALE_NULL_MAX];
+
+      if (setlocale_null_r (LC_NUMERIC, buf, sizeof (buf)))
+        abort ();
+      if (strcmp (expected, buf) != 0)
+        {
+          fprintf (stderr, "thread1 disturbed by thread2!\n"); fflush (stderr);
+          abort ();
+        }
+    }
+
+  /*NOTREACHED*/
+}
+
+static void *
+thread2_func (void *arg)
+{
+  for (;;)
+    {
+      char buf[SETLOCALE_NULL_MAX];
+
+      setlocale_null_r (LC_NUMERIC, buf, sizeof (buf));
+      setlocale_null_r (LC_TIME, buf, sizeof (buf));
+    }
+
+  /*NOTREACHED*/
+}
+
+int
+main (int argc, char *argv[])
+{
+  if (setlocale (LC_ALL, LOCALE1) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE1 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_NUMERIC, LOCALE2) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE2 not recognized\n");
+      return 77;
+    }
+  if (setlocale (LC_TIME, LOCALE3) == NULL)
+    {
+      fprintf (stderr, "Skipping test: LOCALE3 not recognized\n");
+      return 77;
+    }
+
+  expected = strdup (setlocale (LC_NUMERIC, NULL));
+
+  /* Create the two threads.  */
+  gl_thread_create (thread1_func, NULL);
+  gl_thread_create (thread2_func, NULL);
+
+  /* Let them run for 2 seconds.  */
+  {
+    struct timespec duration;
+    duration.tv_sec = 2;
+    duration.tv_nsec = 0;
+
+    nanosleep (&duration, NULL);
+  }
+
+  return 0;
+}
+
+#else
+
+/* No multithreading available.  */
+
+#include <stdio.h>
+
+int
+main ()
+{
+  fputs ("Skipping test: multithreading not enabled\n", stderr);
+  return 77;
+}
+
+#endif
+
+/* Without locking, the results of this test would be:
+glibc                OK
+musl libc            OK
+macOS                OK
+FreeBSD              OK
+NetBSD               OK
+OpenBSD              crash < 1 sec
+AIX                  crash < 2 sec
+HP-UX                OK
+IRIX                 OK
+Solaris 10           OK
+Solaris 11.0         OK
+Solaris 11.4         OK
+Solaris OpenIndiana  OK
+Haiku                OK
+Cygwin               OK
+mingw                OK
+MSVC                 OK (assuming compiler option /MD !)
+*/
diff --git a/src/gl/tests/test-setlocale_null.c b/src/gl/tests/test-setlocale_null.c
new file mode 100644
index 0000000..ebe0d36
--- /dev/null
+++ b/src/gl/tests/test-setlocale_null.c
@@ -0,0 +1,32 @@
+/* Test of setlocale_null_r function.
+   Copyright (C) 2019-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <locale.h>
+
+/* Check that SETLOCALE_NULL_ALL_MAX is a constant expression.  */
+static char buf[SETLOCALE_NULL_ALL_MAX];
+
+int
+main ()
+{
+  /* Check that setlocale_null_r() can be used with $(LIB_SETLOCALE_NULL).  */
+  return setlocale_null_r (LC_ALL, buf, sizeof (buf)) != 0;
+}
diff --git a/src/gl/tests/test-setsockopt.c b/src/gl/tests/test-setsockopt.c
new file mode 100644
index 0000000..09ae1aa
--- /dev/null
+++ b/src/gl/tests/test-setsockopt.c
@@ -0,0 +1,55 @@
+/* Test setsockopt() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (setsockopt, int, (int, int, int, const void *, socklen_t));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    int value = 1;
+
+    errno = 0;
+    ASSERT (setsockopt (-1, SOL_SOCKET, SO_REUSEADDR, &value, sizeof (value))
+            == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    int value = 1;
+
+    close (99);
+    errno = 0;
+    ASSERT (setsockopt (99, SOL_SOCKET, SO_REUSEADDR, &value, sizeof (value))
+            == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-shutdown.c b/src/gl/tests/test-shutdown.c
new file mode 100644
index 0000000..11fb617
--- /dev/null
+++ b/src/gl/tests/test-shutdown.c
@@ -0,0 +1,49 @@
+/* Test the shutdown() function.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (shutdown, int, (int, int));
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "sockets.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  (void) gl_sockets_startup (SOCKETS_1_1);
+
+  /* Test behaviour for invalid file descriptors.  */
+  {
+    errno = 0;
+    ASSERT (shutdown (-1, SHUT_RD) == -1);
+    ASSERT (errno == EBADF);
+  }
+  {
+    close (99);
+    errno = 0;
+    ASSERT (shutdown (99, SHUT_RD) == -1);
+    ASSERT (errno == EBADF);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-sigaction.c b/src/gl/tests/test-sigaction.c
new file mode 100644
index 0000000..fc4a45c
--- /dev/null
+++ b/src/gl/tests/test-sigaction.c
@@ -0,0 +1,122 @@
+/* Test of sigaction() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2008.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (sigaction, int, (int, struct sigaction const *,
+                                  struct sigaction *));
+
+#include <stddef.h>
+
+#include "macros.h"
+
+#ifndef SA_NOCLDSTOP
+# define SA_NOCLDSTOP 0
+#endif
+#ifndef SA_ONSTACK
+# define SA_ONSTACK 0
+#endif
+#ifndef SA_RESETHAND
+# define SA_RESETHAND 0
+#endif
+#ifndef SA_RESTART
+# define SA_RESTART 0
+#endif
+#ifndef SA_SIGINFO
+# define SA_SIGINFO 0
+#endif
+#ifndef SA_NOCLDWAIT
+# define SA_NOCLDWAIT 0
+#endif
+
+/* Define a mask of flags required by POSIX.  Some implementations
+   provide other flags as extensions, such as SA_RESTORER, that we
+   must ignore in this test.  */
+#define MASK_SA_FLAGS (SA_NOCLDSTOP | SA_ONSTACK | SA_RESETHAND | SA_RESTART \
+                       | SA_SIGINFO | SA_NOCLDWAIT | SA_NODEFER)
+
+/* This test is unsafe in the presence of an asynchronous SIGABRT,
+   because we install a signal-handler that is intentionally not
+   async-safe.  Hopefully, this does not lead to too many reports of
+   false failures, since people don't generally use 'kill -s SIGABRT'
+   to end a runaway program.  */
+
+static void
+handler (int sig)
+{
+  static int entry_count;
+  struct sigaction sa;
+  ASSERT (sig == SIGABRT);
+  ASSERT (sigaction (SIGABRT, NULL, &sa) == 0);
+  ASSERT ((sa.sa_flags & SA_SIGINFO) == 0);
+  switch (entry_count++)
+    {
+    case 0:
+      ASSERT ((sa.sa_flags & SA_RESETHAND) == 0);
+      ASSERT (sa.sa_handler == handler);
+      break;
+    case 1:
+      /* This assertion fails on glibc-2.3.6 systems with LinuxThreads,
+         when this program is linked with -lpthread, due to the sigaction()
+         override in libpthread.so.  */
+#if !(defined __GLIBC__ || defined __UCLIBC__)
+      ASSERT (sa.sa_handler == SIG_DFL);
+#endif
+      break;
+    default:
+      ASSERT (0);
+    }
+}
+
+int
+main (void)
+{
+  struct sigaction sa;
+  struct sigaction old_sa;
+  sa.sa_handler = handler;
+
+  sa.sa_flags = 0;
+  ASSERT (sigemptyset (&sa.sa_mask) == 0);
+  ASSERT (sigaction (SIGABRT, &sa, NULL) == 0);
+  ASSERT (raise (SIGABRT) == 0);
+
+  sa.sa_flags = SA_RESETHAND | SA_NODEFER;
+  ASSERT (sigaction (SIGABRT, &sa, &old_sa) == 0);
+  ASSERT ((old_sa.sa_flags & MASK_SA_FLAGS) == 0);
+  ASSERT (old_sa.sa_handler == handler);
+  ASSERT (raise (SIGABRT) == 0);
+
+  sa.sa_handler = SIG_DFL;
+  ASSERT (sigaction (SIGABRT, &sa, &old_sa) == 0);
+  ASSERT ((old_sa.sa_flags & SA_SIGINFO) == 0);
+#if !(defined __GLIBC__ || defined __UCLIBC__) /* see above */
+  ASSERT (old_sa.sa_handler == SIG_DFL);
+#endif
+
+  sa.sa_handler = SIG_IGN;
+  ASSERT (sigaction (SIGABRT, &sa, NULL) == 0);
+  ASSERT (raise (SIGABRT) == 0);
+  ASSERT (sigaction (SIGABRT, NULL, &old_sa) == 0);
+  ASSERT (old_sa.sa_handler == SIG_IGN);
+  ASSERT (raise (SIGABRT) == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-signal-h.c b/src/gl/tests/test-signal-h.c
new file mode 100644
index 0000000..b9d5176
--- /dev/null
+++ b/src/gl/tests/test-signal-h.c
@@ -0,0 +1,129 @@
+/* Test of <signal.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+/* Check for required types.  */
+struct
+{
+  size_t a;
+  uid_t b;
+  volatile sig_atomic_t c;
+  sigset_t d;
+  pid_t e;
+#if 0
+  /* Not guaranteed by gnulib.  */
+  pthread_t f;
+  struct timespec g;
+#endif
+} s;
+
+/* Check that NSIG is defined.  */
+int nsig = NSIG;
+
+int
+main (void)
+{
+  switch (0)
+    {
+      /* The following are guaranteed by C.  */
+    case 0:
+    case SIGABRT:
+    case SIGFPE:
+    case SIGILL:
+    case SIGINT:
+    case SIGSEGV:
+    case SIGTERM:
+      /* The following is guaranteed by gnulib.  */
+#if GNULIB_SIGPIPE || defined SIGPIPE
+    case SIGPIPE:
+#endif
+      /* Ensure no conflict with other standardized names.  */
+#ifdef SIGALRM
+    case SIGALRM:
+#endif
+      /* On Haiku, SIGBUS is mistakenly equal to SIGSEGV.  */
+#if defined SIGBUS && SIGBUS != SIGSEGV
+    case SIGBUS:
+#endif
+#ifdef SIGCHLD
+    case SIGCHLD:
+#endif
+#ifdef SIGCONT
+    case SIGCONT:
+#endif
+#ifdef SIGHUP
+    case SIGHUP:
+#endif
+#ifdef SIGKILL
+    case SIGKILL:
+#endif
+#ifdef SIGQUIT
+    case SIGQUIT:
+#endif
+#ifdef SIGSTOP
+    case SIGSTOP:
+#endif
+#ifdef SIGTSTP
+    case SIGTSTP:
+#endif
+#ifdef SIGTTIN
+    case SIGTTIN:
+#endif
+#ifdef SIGTTOU
+    case SIGTTOU:
+#endif
+#ifdef SIGUSR1
+    case SIGUSR1:
+#endif
+#ifdef SIGUSR2
+    case SIGUSR2:
+#endif
+#ifdef SIGSYS
+    case SIGSYS:
+#endif
+#ifdef SIGTRAP
+    case SIGTRAP:
+#endif
+#ifdef SIGURG
+    case SIGURG:
+#endif
+#ifdef SIGVTALRM
+    case SIGVTALRM:
+#endif
+#ifdef SIGXCPU
+    case SIGXCPU:
+#endif
+#ifdef SIGXFSZ
+    case SIGXFSZ:
+#endif
+      /* SIGRTMIN and SIGRTMAX need not be compile-time constants.  */
+#if 0
+# ifdef SIGRTMIN
+    case SIGRTMIN:
+# endif
+# ifdef SIGRTMAX
+    case SIGRTMAX:
+# endif
+#endif
+      ;
+    }
+  return s.a + s.b + s.c + s.e;
+}
diff --git a/src/gl/tests/test-sigprocmask.c b/src/gl/tests/test-sigprocmask.c
new file mode 100644
index 0000000..bf000d7
--- /dev/null
+++ b/src/gl/tests/test-sigprocmask.c
@@ -0,0 +1,102 @@
+/* Test of sigprocmask.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <signal.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (sigprocmask, int, (int, const sigset_t *, sigset_t *));
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+#if !(defined _WIN32 && !defined __CYGWIN__)
+
+static volatile int sigint_occurred;
+
+static void
+sigint_handler (int sig)
+{
+  sigint_occurred++;
+}
+
+int
+main (int argc, char *argv[])
+{
+  sigset_t set;
+  pid_t pid = getpid ();
+  char command[80];
+
+  if (sizeof (int) < sizeof pid && 0x7fffffff < pid)
+    {
+      fputs ("Skipping test: pid too large\n", stderr);
+      return 77;
+    }
+
+  signal (SIGINT, sigint_handler);
+
+  sigemptyset (&set);
+  sigaddset (&set, SIGINT);
+
+  /* Check error handling.  */
+  ASSERT (sigprocmask (1729, &set, NULL) == -1);
+  ASSERT (errno == EINVAL);
+
+  /* Block SIGINT.  */
+  ASSERT (sigprocmask (SIG_BLOCK, &set, NULL) == 0);
+
+  /* Request a SIGINT signal from outside.  */
+  sprintf (command, "sh -c 'sleep 1; kill -%d %d' &", SIGINT, (int) pid);
+  ASSERT (system (command) == 0);
+
+  /* Wait.  */
+  sleep (2);
+
+  /* The signal should not have arrived yet, because it is blocked.  */
+  ASSERT (sigint_occurred == 0);
+
+  /* Unblock SIGINT.  */
+  ASSERT (sigprocmask (SIG_UNBLOCK, &set, NULL) == 0);
+
+  /* The signal should have arrived now, because POSIX says
+       "If there are any pending unblocked signals after the call to
+        sigprocmask(), at least one of those signals shall be delivered
+        before the call to sigprocmask() returns."  */
+  ASSERT (sigint_occurred == 1);
+
+  return 0;
+}
+
+#else
+
+/* On native Windows, getpid() values and the arguments that are passed to
+   the (Cygwin?) 'kill' program are not necessarily related.  */
+
+int
+main ()
+{
+  fputs ("Skipping test: native Windows platform\n", stderr);
+  return 77;
+}
+
+#endif
diff --git a/src/gl/tests/test-sleep.c b/src/gl/tests/test-sleep.c
new file mode 100644
index 0000000..be9ee83
--- /dev/null
+++ b/src/gl/tests/test-sleep.c
@@ -0,0 +1,58 @@
+/* Test of sleep() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (sleep, unsigned int, (unsigned int));
+
+#include <signal.h>
+
+#include "macros.h"
+
+#if HAVE_DECL_ALARM
+static void
+handle_alarm (int sig)
+{
+  if (sig != SIGALRM)
+    _exit (1);
+}
+#endif
+
+int
+main (void)
+{
+  ASSERT (sleep (1) <= 1);
+
+  ASSERT (sleep (0) == 0);
+
+#if HAVE_DECL_ALARM
+  {
+    const unsigned int pentecost = 50 * 24 * 60 * 60; /* 50 days.  */
+    unsigned int remaining;
+    signal (SIGALRM, handle_alarm);
+    alarm (1);
+    remaining = sleep (pentecost);
+    ASSERT (pentecost - 10 < remaining && remaining <= pentecost);
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-snprintf.c b/src/gl/tests/test-snprintf.c
new file mode 100644
index 0000000..ea6de1c
--- /dev/null
+++ b/src/gl/tests/test-snprintf.c
@@ -0,0 +1,72 @@
+/* Test of snprintf() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (snprintf, int, (char *, size_t, char const *, ...));
+
+#include <string.h>
+
+#include "macros.h"
+
+int
+main (int argc, char *argv[])
+{
+  char buf[8];
+  int size;
+  int retval;
+
+  retval = snprintf (NULL, 0, "%d", 12345);
+  ASSERT (retval == 5);
+
+  for (size = 0; size <= 8; size++)
+    {
+      memcpy (buf, "DEADBEEF", 8);
+      retval = snprintf (buf, size, "%d", 12345);
+      ASSERT (retval == 5);
+      if (size < 6)
+        {
+          if (size > 0)
+            {
+              ASSERT (memcmp (buf, "12345", size - 1) == 0);
+              ASSERT (buf[size - 1] == '\0' || buf[size - 1] == '0' + size);
+            }
+#if !CHECK_SNPRINTF_POSIX
+          if (size > 0)
+#endif
+            ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);
+        }
+      else
+        {
+          ASSERT (memcmp (buf, "12345\0EF", 8) == 0);
+        }
+    }
+
+  /* Test the support of the POSIX/XSI format strings with positions.  */
+  {
+    char result[100];
+    retval = snprintf (result, sizeof (result), "%2$d %1$d", 33, 55);
+    ASSERT (strcmp (result, "55 33") == 0);
+    ASSERT (retval == strlen (result));
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-sockets.c b/src/gl/tests/test-sockets.c
new file mode 100644
index 0000000..8fd603c
--- /dev/null
+++ b/src/gl/tests/test-sockets.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2008-2021 Free Software Foundation, Inc.
+ * Written by Simon Josefsson.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "sockets.h"
+
+int
+main (void)
+{
+  int err;
+
+  err = gl_sockets_startup (SOCKETS_1_1);
+  if (err != 0)
+    {
+      printf ("wsastartup failed %d\n", err);
+      return 1;
+    }
+
+  err = gl_sockets_cleanup ();
+  if (err != 0)
+    {
+      printf ("wsacleanup failed %d\n", err);
+      return 1;
+    }
+
+  (void) gl_fd_to_handle (0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-stat-time.c b/src/gl/tests/test-stat-time.c
new file mode 100644
index 0000000..cd0f3c3
--- /dev/null
+++ b/src/gl/tests/test-stat-time.c
@@ -0,0 +1,248 @@
+/* Test of <stat-time.h>.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by James Youngman <jay@gnu.org>, 2007.  */
+
+#include <config.h>
+
+#include "stat-time.h"
+
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <time.h>
+
+#include "macros.h"
+
+#define BASE "test-stat-time.t"
+#include "nap.h"
+
+enum { NFILES = 4 };
+
+static char filename_stamp1[50];
+static char filename_testfile[50];
+static char filename_stamp2[50];
+static char filename_stamp3[50];
+
+/* Use file names that are different at each run.
+   This is necessary for test_birthtime() to pass on native Windows:
+   On this platform, the file system apparently remembers the creation time
+   of a file even after it is removed and created anew.  See
+   "Windows NT Contains File System Tunneling Capabilities"
+   <https://support.microsoft.com/en-us/help/172190/>  */
+static void
+initialize_filenames (void)
+{
+  long t = (long) time (NULL);
+  sprintf (filename_stamp1,   "t-stt-%ld-stamp1", t);
+  sprintf (filename_testfile, "t-stt-%ld-testfile", t);
+  sprintf (filename_stamp2,   "t-stt-%ld-stamp2", t);
+  sprintf (filename_stamp3,   "t-stt-%ld-stamp3", t);
+}
+
+static int
+force_unlink (const char *filename)
+{
+  /* This chmod is necessary on mingw, where unlink() of a read-only file
+     fails with EPERM.  */
+  chmod (filename, 0600);
+  return unlink (filename);
+}
+
+static void
+cleanup (int sig)
+{
+  /* Remove temporary files.  */
+  force_unlink (filename_stamp1);
+  force_unlink (filename_testfile);
+  force_unlink (filename_stamp2);
+  force_unlink (filename_stamp3);
+
+  if (sig != 0)
+    _exit (1);
+}
+
+static int
+open_file (const char *filename, int flags)
+{
+  int fd = open (filename, flags | O_WRONLY, 0500);
+  if (fd >= 0)
+    {
+      close (fd);
+      return 1;
+    }
+  else
+    {
+      return 0;
+    }
+}
+
+static void
+create_file (const char *filename)
+{
+  ASSERT (open_file (filename, O_CREAT | O_EXCL));
+}
+
+static void
+do_stat (const char *filename, struct stat *p)
+{
+  ASSERT (stat (filename, p) == 0);
+}
+
+static void
+prepare_test (struct stat *statinfo, struct timespec *modtimes)
+{
+  int i;
+
+  create_file (filename_stamp1);
+  nap ();
+  create_file (filename_testfile);
+  nap ();
+  create_file (filename_stamp2);
+  nap ();
+  ASSERT (chmod (filename_testfile, 0400) == 0);
+  nap ();
+  create_file (filename_stamp3);
+
+  do_stat (filename_stamp1,   &statinfo[0]);
+  do_stat (filename_testfile, &statinfo[1]);
+  do_stat (filename_stamp2,   &statinfo[2]);
+  do_stat (filename_stamp3,   &statinfo[3]);
+
+  /* Now use our access functions. */
+  for (i = 0; i < NFILES; ++i)
+    {
+      modtimes[i] = get_stat_mtime (&statinfo[i]);
+    }
+}
+
+static void
+test_mtime (const struct stat *statinfo, struct timespec *modtimes)
+{
+  int i;
+
+  /* Use the struct stat fields directly. */
+  /* mtime(stamp1) < mtime(stamp2) */
+  ASSERT (statinfo[0].st_mtime < statinfo[2].st_mtime
+          || (statinfo[0].st_mtime == statinfo[2].st_mtime
+              && (get_stat_mtime_ns (&statinfo[0])
+                  < get_stat_mtime_ns (&statinfo[2]))));
+  /* mtime(stamp2) < mtime(stamp3) */
+  ASSERT (statinfo[2].st_mtime < statinfo[3].st_mtime
+          || (statinfo[2].st_mtime == statinfo[3].st_mtime
+              && (get_stat_mtime_ns (&statinfo[2])
+                  < get_stat_mtime_ns (&statinfo[3]))));
+
+  /* Now check the result of the access functions. */
+  /* mtime(stamp1) < mtime(stamp2) */
+  ASSERT (modtimes[0].tv_sec < modtimes[2].tv_sec
+          || (modtimes[0].tv_sec == modtimes[2].tv_sec
+              && modtimes[0].tv_nsec < modtimes[2].tv_nsec));
+  /* mtime(stamp2) < mtime(stamp3) */
+  ASSERT (modtimes[2].tv_sec < modtimes[3].tv_sec
+          || (modtimes[2].tv_sec == modtimes[3].tv_sec
+              && modtimes[2].tv_nsec < modtimes[3].tv_nsec));
+
+  /* verify equivalence */
+  for (i = 0; i < NFILES; ++i)
+    {
+      struct timespec ts;
+      ts = get_stat_mtime (&statinfo[i]);
+      ASSERT (ts.tv_sec == statinfo[i].st_mtime);
+    }
+}
+
+#if defined _WIN32 && !defined __CYGWIN__
+/* Skip the ctime tests on native Windows platforms, because their
+   st_ctime is either the same as st_mtime (plus or minus an offset)
+   or set to the file _creation_ time, and is not influenced by rename
+   or chmod.  */
+# define test_ctime(ignored) ((void) 0)
+#else
+static void
+test_ctime (const struct stat *statinfo)
+{
+  /* On some buggy NFS clients, mtime and ctime are disproportionately
+     skewed from one another.  Skip this test in that case.  */
+  if (statinfo[0].st_mtime != statinfo[0].st_ctime)
+    return;
+
+  /* mtime(stamp2) < ctime(testfile) */
+  ASSERT (statinfo[2].st_mtime < statinfo[1].st_ctime
+          || (statinfo[2].st_mtime == statinfo[1].st_ctime
+              && (get_stat_mtime_ns (&statinfo[2])
+                  < get_stat_ctime_ns (&statinfo[1]))));
+}
+#endif
+
+static void
+test_birthtime (const struct stat *statinfo,
+                const struct timespec *modtimes,
+                struct timespec *birthtimes)
+{
+  int i;
+
+  /* Collect the birth times.  */
+  for (i = 0; i < NFILES; ++i)
+    {
+      birthtimes[i] = get_stat_birthtime (&statinfo[i]);
+      if (birthtimes[i].tv_nsec < 0)
+        return;
+    }
+
+  /* mtime(stamp1) < birthtime(testfile) */
+  ASSERT (modtimes[0].tv_sec < birthtimes[1].tv_sec
+          || (modtimes[0].tv_sec == birthtimes[1].tv_sec
+              && modtimes[0].tv_nsec < birthtimes[1].tv_nsec));
+  /* birthtime(testfile) < mtime(stamp2) */
+  ASSERT (birthtimes[1].tv_sec < modtimes[2].tv_sec
+          || (birthtimes[1].tv_sec == modtimes[2].tv_sec
+              && birthtimes[1].tv_nsec < modtimes[2].tv_nsec));
+}
+
+int
+main (void)
+{
+  struct stat statinfo[NFILES];
+  struct timespec modtimes[NFILES];
+  struct timespec birthtimes[NFILES];
+
+  initialize_filenames ();
+
+#ifdef SIGHUP
+  signal (SIGHUP, cleanup);
+#endif
+#ifdef SIGINT
+  signal (SIGINT, cleanup);
+#endif
+#ifdef SIGQUIT
+  signal (SIGQUIT, cleanup);
+#endif
+#ifdef SIGTERM
+  signal (SIGTERM, cleanup);
+#endif
+
+  cleanup (0);
+  prepare_test (statinfo, modtimes);
+  test_mtime (statinfo, modtimes);
+  test_ctime (statinfo);
+  test_birthtime (statinfo, modtimes, birthtimes);
+
+  cleanup (0);
+  return 0;
+}
diff --git a/src/gl/tests/test-stat.c b/src/gl/tests/test-stat.c
new file mode 100644
index 0000000..6f0a995
--- /dev/null
+++ b/src/gl/tests/test-stat.c
@@ -0,0 +1,56 @@
+/* Tests of stat.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+/* Caution: stat may be a function-like macro.  Although this
+   signature check must pass, it may be the signature of the real (and
+   broken) stat rather than rpl_stat.  Most code should not use the
+   address of stat.  */
+#include "signature.h"
+SIGNATURE_CHECK (stat, int, (char const *, struct stat *));
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "same-inode.h"
+#include "macros.h"
+
+#define BASE "test-stat.t"
+
+#include "test-stat.h"
+
+/* Wrapper around stat, which works even if stat is a function-like
+   macro, where test_stat_func(stat) would do the wrong thing.  */
+static int
+do_stat (char const *name, struct stat *st)
+{
+  return stat (name, st);
+}
+
+int
+main (void)
+{
+  return test_stat_func (do_stat, true);
+}
diff --git a/src/gl/tests/test-stat.h b/src/gl/tests/test-stat.h
new file mode 100644
index 0000000..e728ca2
--- /dev/null
+++ b/src/gl/tests/test-stat.h
@@ -0,0 +1,107 @@
+/* Tests of stat.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+/* This file is designed to test both stat(n,buf) and
+   fstatat(AT_FDCWD,n,buf,0).  FUNC is the function to test.  Assumes
+   that BASE and ASSERT are already defined, and that appropriate
+   headers are already included.  If PRINT, warn before skipping
+   symlink tests with status 77.  */
+
+static int
+test_stat_func (int (*func) (char const *, struct stat *), bool print)
+{
+  struct stat st1;
+  struct stat st2;
+  char *cwd = getcwd (NULL, 0);
+
+  ASSERT (cwd);
+  ASSERT (func (".", &st1) == 0);
+  ASSERT (func ("./", &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+  ASSERT (func (cwd, &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+  ASSERT (func ("/", &st1) == 0);
+  ASSERT (func ("///", &st2) == 0);
+#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
+  ASSERT (SAME_INODE (st1, st2));
+#endif
+
+  errno = 0;
+  ASSERT (func ("", &st1) == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nosuch", &st1) == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nosuch/", &st1) == -1);
+  ASSERT (errno == ENOENT);
+
+  ASSERT (close (creat (BASE "file", 0600)) == 0);
+  ASSERT (func (BASE "file", &st1) == 0);
+  errno = 0;
+  ASSERT (func (BASE "file/", &st1) == -1);
+  ASSERT (errno == ENOTDIR);
+
+  /* Now for some symlink tests, where supported.  We set up:
+     link1 -> directory
+     link2 -> file
+     link3 -> dangling
+     link4 -> loop
+     then test behavior with trailing slash.
+  */
+  if (symlink (".", BASE "link1") != 0)
+    {
+      ASSERT (unlink (BASE "file") == 0);
+      if (print)
+        fputs ("skipping test: symlinks not supported on this file system\n",
+               stderr);
+      return 77;
+    }
+  ASSERT (symlink (BASE "file", BASE "link2") == 0);
+  ASSERT (symlink (BASE "nosuch", BASE "link3") == 0);
+  ASSERT (symlink (BASE "link4", BASE "link4") == 0);
+
+  ASSERT (func (BASE "link1/", &st1) == 0);
+  ASSERT (S_ISDIR (st1.st_mode));
+
+  errno = 0;
+  ASSERT (func (BASE "link2/", &st1) == -1);
+  ASSERT (errno == ENOTDIR);
+
+  errno = 0;
+  ASSERT (func (BASE "link3/", &st1) == -1);
+  ASSERT (errno == ENOENT);
+
+  errno = 0;
+  ASSERT (func (BASE "link4/", &st1) == -1);
+  ASSERT (errno == ELOOP);
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "link1") == 0);
+  ASSERT (unlink (BASE "link2") == 0);
+  ASSERT (unlink (BASE "link3") == 0);
+  ASSERT (unlink (BASE "link4") == 0);
+  free (cwd);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-stdalign.c b/src/gl/tests/test-stdalign.c
new file mode 100644
index 0000000..38812b6
--- /dev/null
+++ b/src/gl/tests/test-stdalign.c
@@ -0,0 +1,126 @@
+/* Test of <stdalign.h>.
+   Copyright 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert, inspired by Bruno Haible's test-alignof.c.  */
+
+#include <config.h>
+
+#include <stdalign.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "verify.h"
+
+#include "macros.h"
+
+typedef long double longdouble;
+typedef struct { char a[1]; } struct1;
+typedef struct { char a[2]; } struct2;
+typedef struct { char a[3]; } struct3;
+typedef struct { char a[4]; } struct4;
+
+verify (__alignof_is_defined == 1);
+#ifndef alignof
+# error "alignof is not a macro"
+#endif
+
+#if __alignas_is_defined
+verify (__alignas_is_defined == 1);
+# ifndef alignas
+#  error "alignas is not a macro"
+# endif
+/* mingw can go up only to 8.  8 is all that GNU Emacs needs, so let's
+   limit the test to 8 for now.  */
+# define TEST_ALIGNMENT 8
+#else
+# define _Alignas(alignment)
+# define alignas(alignment)
+# define TEST_ALIGNMENT 1
+#endif
+
+#define CHECK_STATIC(type) \
+  typedef struct { char slot1; type slot2; } type##_helper; \
+  verify (alignof (type) == offsetof (type##_helper, slot2)); \
+  verify (_Alignof (type) == alignof (type)); \
+  const int type##_alignment = alignof (type); \
+  type alignas (TEST_ALIGNMENT) static_##type##_alignas; \
+  type _Alignas (TEST_ALIGNMENT) static_##type##_Alignas
+
+#define CHECK_ALIGNED(var) ASSERT ((uintptr_t) &(var) % TEST_ALIGNMENT == 0)
+
+CHECK_STATIC (char);
+CHECK_STATIC (short);
+CHECK_STATIC (int);
+CHECK_STATIC (long);
+#ifdef INT64_MAX
+CHECK_STATIC (int64_t);
+#endif
+CHECK_STATIC (float);
+CHECK_STATIC (double);
+/* CHECK_STATIC (longdouble); */
+CHECK_STATIC (struct1);
+CHECK_STATIC (struct2);
+CHECK_STATIC (struct3);
+CHECK_STATIC (struct4);
+
+int
+main ()
+{
+#if defined __SUNPRO_C && __SUNPRO_C < 0x5150
+  /* Avoid a test failure due to Sun Studio Developer Bug Report #2125432.  */
+  fputs ("Skipping test: known Sun C compiler bug\n", stderr);
+  return 77;
+#elif defined __HP_cc && __ia64
+  /* Avoid a test failure due to HP-UX Itanium cc bug; see:
+     https://lists.gnu.org/r/bug-gnulib/2017-03/msg00078.html  */
+  fputs ("Skipping test: known HP-UX Itanium cc compiler bug\n", stderr);
+  return 77;
+#elif defined __clang__ && defined __ibmxl__
+  /* Avoid a test failure with IBM xlc 16.1.  It ignores alignas (8),
+     _Alignas (8), and __attribute__ ((__aligned__ (8))).  */
+  fputs ("Skipping test: known AIX XL C compiler deficiency\n", stderr);
+  return 77;
+#else
+  CHECK_ALIGNED (static_char_alignas);
+  CHECK_ALIGNED (static_char_Alignas);
+  CHECK_ALIGNED (static_short_alignas);
+  CHECK_ALIGNED (static_short_Alignas);
+  CHECK_ALIGNED (static_int_alignas);
+  CHECK_ALIGNED (static_int_Alignas);
+  CHECK_ALIGNED (static_long_alignas);
+  CHECK_ALIGNED (static_long_Alignas);
+# ifdef INT64_MAX
+  CHECK_ALIGNED (static_int64_t_alignas);
+  CHECK_ALIGNED (static_int64_t_Alignas);
+# endif
+  CHECK_ALIGNED (static_float_alignas);
+  CHECK_ALIGNED (static_float_Alignas);
+  CHECK_ALIGNED (static_double_alignas);
+  CHECK_ALIGNED (static_double_Alignas);
+  /* CHECK_ALIGNED (static_longdouble_alignas); */
+  /* CHECK_ALIGNED (static_longdouble_Alignas); */
+  CHECK_ALIGNED (static_struct1_alignas);
+  CHECK_ALIGNED (static_struct1_Alignas);
+  CHECK_ALIGNED (static_struct2_alignas);
+  CHECK_ALIGNED (static_struct2_Alignas);
+  CHECK_ALIGNED (static_struct3_alignas);
+  CHECK_ALIGNED (static_struct3_Alignas);
+  CHECK_ALIGNED (static_struct4_alignas);
+  CHECK_ALIGNED (static_struct4_Alignas);
+  return 0;
+#endif
+}
diff --git a/src/gl/tests/test-stdbool.c b/src/gl/tests/test-stdbool.c
new file mode 100644
index 0000000..60e5242
--- /dev/null
+++ b/src/gl/tests/test-stdbool.c
@@ -0,0 +1,122 @@
+/* Test of <stdbool.h> substitute.
+   Copyright (C) 2002-2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+/* Define ADDRESS_CHECK_OKAY if it is OK to assign an address to a 'bool'
+   and this does not generate a warning (because we want this test to succeed
+   even when using gcc's -Werror).  */
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) \
+    || (__clang_major__ >= 4)
+/* We can silence the warning.  */
+# pragma GCC diagnostic ignored "-Waddress"
+# define ADDRESS_CHECK_OKAY
+#elif defined __GNUC__ || defined __clang__
+/* There may be a warning.  */
+#else
+/* Ignore warnings from other compilers.  */
+# define ADDRESS_CHECK_OKAY
+#endif
+
+#include <config.h>
+
+#include <stdbool.h>
+
+#ifndef bool
+ "error: bool is not defined"
+#endif
+#ifndef false
+ "error: false is not defined"
+#endif
+#if false
+ "error: false is not 0"
+#endif
+#ifndef true
+ "error: true is not defined"
+#endif
+#if true != 1
+ "error: true is not 1"
+#endif
+#ifndef __bool_true_false_are_defined
+ "error: __bool_true_false_are_defined is not defined"
+#endif
+
+/* Several tests cannot be guaranteed with gnulib's <stdbool.h>, at
+   least, not for all compilers and compiler options.  */
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__
+struct s { _Bool s: 1; _Bool t; } s;
+#endif
+
+char a[true == 1 ? 1 : -1];
+char b[false == 0 ? 1 : -1];
+char c[__bool_true_false_are_defined == 1 ? 1 : -1];
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* See above.  */
+char d[(bool) 0.5 == true ? 1 : -1];
+# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning.  */
+/* C99 may plausibly be interpreted as not requiring support for a cast from
+   a variable's address to bool in a static initializer.  So treat it like a
+   GCC extension.  */
+#  if defined __GNUC__ || defined __clang__
+bool e = &s;
+#  endif
+# endif
+char f[(_Bool) 0.0 == false ? 1 : -1];
+#endif
+char g[true];
+char h[sizeof (_Bool)];
+#if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* See above.  */
+char i[sizeof s.t];
+#endif
+enum { j = false, k = true, l = false * true, m = true * 256 };
+_Bool n[m];
+char o[sizeof n == m * sizeof n[0] ? 1 : -1];
+char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
+/* Catch a bug in an HP-UX C compiler.  See
+   https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
+   https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html
+ */
+_Bool q = true;
+_Bool *pq = &q;
+
+int
+main ()
+{
+  int error = 0;
+
+#if HAVE_STDBOOL_H || 3 <= __GNUC_ || 4 <= __clang_major___ /* See above.  */
+# ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning.  */
+  /* A cast from a variable's address to bool is valid in expressions.  */
+  {
+    bool e1 = &s;
+    if (!e1)
+      error = 1;
+  }
+# endif
+#endif
+
+  /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0
+     reported by James Lemley on 2005-10-05; see
+     https://lists.gnu.org/r/bug-coreutils/2005-10/msg00086.html
+     This is a runtime test, since a corresponding compile-time
+     test would rely on initializer extensions.  */
+  {
+    char digs[] = "0123456789";
+    if (&(digs + 5)[-2 + (bool) 1] != &digs[4])
+      error = 1;
+  }
+
+  return error;
+}
diff --git a/src/gl/tests/test-stddef.c b/src/gl/tests/test-stddef.c
new file mode 100644
index 0000000..21b46b9
--- /dev/null
+++ b/src/gl/tests/test-stddef.c
@@ -0,0 +1,77 @@
+/* Test of <stddef.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <stddef.h>
+#include <limits.h>
+#include <stdalign.h>
+#include "verify.h"
+
+/* Check that appropriate types are defined.  */
+wchar_t a = 'c';
+ptrdiff_t b = 1;
+size_t c = 2;
+max_align_t x;
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+/* Check that offsetof produces integer constants with correct type.  */
+struct d
+{
+  char e;
+  char f;
+};
+/* Solaris 10 has a bug where offsetof is under-parenthesized, and
+   cannot be used as an arbitrary expression.  However, since it is
+   unlikely to bite real code, we ignore that short-coming.  */
+/* verify (sizeof offsetof (struct d, e) == sizeof (size_t)); */
+verify (sizeof (offsetof (struct d, e)) == sizeof (size_t));
+verify (offsetof (struct d, f) == 1);
+
+/* offsetof promotes to an unsigned integer if and only if sizes do
+   not fit in int.  */
+verify ((offsetof (struct d, e) < -1) == (INT_MAX < (size_t) -1));
+
+/* Check max_align_t's alignment.  */
+verify (alignof (double) <= alignof (max_align_t));
+verify (alignof (int) <= alignof (max_align_t));
+verify (alignof (long double) <= alignof (max_align_t));
+verify (alignof (long int) <= alignof (max_align_t));
+verify (alignof (ptrdiff_t) <= alignof (max_align_t));
+verify (alignof (size_t) <= alignof (max_align_t));
+verify (alignof (wchar_t) <= alignof (max_align_t));
+verify (alignof (struct d) <= alignof (max_align_t));
+#if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__
+verify (__alignof__ (double) <= __alignof__ (max_align_t));
+verify (__alignof__ (int) <= __alignof__ (max_align_t));
+verify (__alignof__ (long double) <= __alignof__ (max_align_t));
+verify (__alignof__ (long int) <= __alignof__ (max_align_t));
+verify (__alignof__ (ptrdiff_t) <= __alignof__ (max_align_t));
+verify (__alignof__ (size_t) <= __alignof__ (max_align_t));
+verify (__alignof__ (wchar_t) <= __alignof__ (max_align_t));
+verify (__alignof__ (struct d) <= __alignof__ (max_align_t));
+#endif
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-stdint.c b/src/gl/tests/test-stdint.c
new file mode 100644
index 0000000..dc6fad7
--- /dev/null
+++ b/src/gl/tests/test-stdint.c
@@ -0,0 +1,428 @@
+/* Test of <stdint.h> substitute.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2006.  */
+
+#include <config.h>
+
+/* Whether to enable pedantic checks. */
+#define DO_PEDANTIC 0
+
+#include <stdint.h>
+
+#include "verify.h"
+#include "intprops.h"
+
+#if ((__GNUC__ >= 2) || (__clang_major__ >= 4)) && DO_PEDANTIC
+# define verify_same_types(expr1,expr2)  \
+    extern void _verify_func(__LINE__) (__typeof__ (expr1) *); \
+    extern void _verify_func(__LINE__) (__typeof__ (expr2) *);
+# define _verify_func(line) _verify_func2(line)
+# define _verify_func2(line) verify_func_ ## line
+#else
+# define verify_same_types(expr1,expr2) extern void verify_func (int)
+#endif
+
+/* 7.18.1.1. Exact-width integer types */
+/* 7.18.2.1. Limits of exact-width integer types */
+
+int8_t a1[3] = { INT8_C (17), INT8_MIN, INT8_MAX };
+verify (TYPE_MINIMUM (int8_t) == INT8_MIN);
+verify (TYPE_MAXIMUM (int8_t) == INT8_MAX);
+verify_same_types (INT8_MIN, (int8_t) 0 + 0);
+verify_same_types (INT8_MAX, (int8_t) 0 + 0);
+
+int16_t a2[3] = { INT16_C (17), INT16_MIN, INT16_MAX };
+verify (TYPE_MINIMUM (int16_t) == INT16_MIN);
+verify (TYPE_MAXIMUM (int16_t) == INT16_MAX);
+verify_same_types (INT16_MIN, (int16_t) 0 + 0);
+verify_same_types (INT16_MAX, (int16_t) 0 + 0);
+
+int32_t a3[3] = { INT32_C (17), INT32_MIN, INT32_MAX };
+verify (TYPE_MINIMUM (int32_t) == INT32_MIN);
+verify (TYPE_MAXIMUM (int32_t) == INT32_MAX);
+verify_same_types (INT32_MIN, (int32_t) 0 + 0);
+verify_same_types (INT32_MAX, (int32_t) 0 + 0);
+
+#ifdef INT64_MAX
+int64_t a4[3] = { INT64_C (17), INT64_MIN, INT64_MAX };
+verify (TYPE_MINIMUM (int64_t) == INT64_MIN);
+verify (TYPE_MAXIMUM (int64_t) == INT64_MAX);
+verify_same_types (INT64_MIN, (int64_t) 0 + 0);
+verify_same_types (INT64_MAX, (int64_t) 0 + 0);
+#endif
+
+uint8_t b1[2] = { UINT8_C (17), UINT8_MAX };
+verify (TYPE_MAXIMUM (uint8_t) == UINT8_MAX);
+verify_same_types (UINT8_MAX, (uint8_t) 0 + 0);
+
+uint16_t b2[2] = { UINT16_C (17), UINT16_MAX };
+verify (TYPE_MAXIMUM (uint16_t) == UINT16_MAX);
+verify_same_types (UINT16_MAX, (uint16_t) 0 + 0);
+
+uint32_t b3[2] = { UINT32_C (17), UINT32_MAX };
+verify (TYPE_MAXIMUM (uint32_t) == UINT32_MAX);
+verify_same_types (UINT32_MAX, (uint32_t) 0 + 0);
+
+#ifdef UINT64_MAX
+uint64_t b4[2] = { UINT64_C (17), UINT64_MAX };
+verify (TYPE_MAXIMUM (uint64_t) == UINT64_MAX);
+verify_same_types (UINT64_MAX, (uint64_t) 0 + 0);
+#endif
+
+#if INT8_MIN && INT8_MAX && INT16_MIN && INT16_MAX && INT32_MIN && INT32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#if UINT8_MAX && UINT16_MAX && UINT32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+/* 7.18.1.2. Minimum-width integer types */
+/* 7.18.2.2. Limits of minimum-width integer types */
+
+int_least8_t c1[3] = { 17, INT_LEAST8_MIN, INT_LEAST8_MAX };
+verify (TYPE_MINIMUM (int_least8_t) == INT_LEAST8_MIN);
+verify (TYPE_MAXIMUM (int_least8_t) == INT_LEAST8_MAX);
+verify_same_types (INT_LEAST8_MIN, (int_least8_t) 0 + 0);
+verify_same_types (INT_LEAST8_MAX, (int_least8_t) 0 + 0);
+
+int_least16_t c2[3] = { 17, INT_LEAST16_MIN, INT_LEAST16_MAX };
+verify (TYPE_MINIMUM (int_least16_t) == INT_LEAST16_MIN);
+verify (TYPE_MAXIMUM (int_least16_t) == INT_LEAST16_MAX);
+verify_same_types (INT_LEAST16_MIN, (int_least16_t) 0 + 0);
+verify_same_types (INT_LEAST16_MAX, (int_least16_t) 0 + 0);
+
+int_least32_t c3[3] = { 17, INT_LEAST32_MIN, INT_LEAST32_MAX };
+verify (TYPE_MINIMUM (int_least32_t) == INT_LEAST32_MIN);
+verify (TYPE_MAXIMUM (int_least32_t) == INT_LEAST32_MAX);
+verify_same_types (INT_LEAST32_MIN, (int_least32_t) 0 + 0);
+verify_same_types (INT_LEAST32_MAX, (int_least32_t) 0 + 0);
+
+#ifdef INT_LEAST64_MAX
+int_least64_t c4[3] = { 17, INT_LEAST64_MIN, INT_LEAST64_MAX };
+verify (TYPE_MINIMUM (int_least64_t) == INT_LEAST64_MIN);
+verify (TYPE_MAXIMUM (int_least64_t) == INT_LEAST64_MAX);
+verify_same_types (INT_LEAST64_MIN, (int_least64_t) 0 + 0);
+verify_same_types (INT_LEAST64_MAX, (int_least64_t) 0 + 0);
+#endif
+
+uint_least8_t d1[2] = { 17, UINT_LEAST8_MAX };
+verify (TYPE_MAXIMUM (uint_least8_t) == UINT_LEAST8_MAX);
+verify_same_types (UINT_LEAST8_MAX, (uint_least8_t) 0 + 0);
+
+uint_least16_t d2[2] = { 17, UINT_LEAST16_MAX };
+verify (TYPE_MAXIMUM (uint_least16_t) == UINT_LEAST16_MAX);
+verify_same_types (UINT_LEAST16_MAX, (uint_least16_t) 0 + 0);
+
+uint_least32_t d3[2] = { 17, UINT_LEAST32_MAX };
+verify (TYPE_MAXIMUM (uint_least32_t) == UINT_LEAST32_MAX);
+verify_same_types (UINT_LEAST32_MAX, (uint_least32_t) 0 + 0);
+
+#ifdef UINT_LEAST64_MAX
+uint_least64_t d4[2] = { 17, UINT_LEAST64_MAX };
+verify (TYPE_MAXIMUM (uint_least64_t) == UINT_LEAST64_MAX);
+verify_same_types (UINT_LEAST64_MAX, (uint_least64_t) 0 + 0);
+#endif
+
+#if INT_LEAST8_MIN && INT_LEAST8_MAX && INT_LEAST16_MIN && INT_LEAST16_MAX && INT_LEAST32_MIN && INT_LEAST32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#if UINT_LEAST8_MAX && UINT_LEAST16_MAX && UINT_LEAST32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+/* 7.18.1.3. Fastest minimum-width integer types */
+/* 7.18.2.3. Limits of fastest minimum-width integer types */
+
+int_fast8_t e1[3] = { 17, INT_FAST8_MIN, INT_FAST8_MAX };
+verify (TYPE_MINIMUM (int_fast8_t) == INT_FAST8_MIN);
+verify (TYPE_MAXIMUM (int_fast8_t) == INT_FAST8_MAX);
+verify_same_types (INT_FAST8_MIN, (int_fast8_t) 0 + 0);
+verify_same_types (INT_FAST8_MAX, (int_fast8_t) 0 + 0);
+
+int_fast16_t e2[3] = { 17, INT_FAST16_MIN, INT_FAST16_MAX };
+verify (TYPE_MINIMUM (int_fast16_t) == INT_FAST16_MIN);
+verify (TYPE_MAXIMUM (int_fast16_t) == INT_FAST16_MAX);
+verify_same_types (INT_FAST16_MIN, (int_fast16_t) 0 + 0);
+verify_same_types (INT_FAST16_MAX, (int_fast16_t) 0 + 0);
+
+int_fast32_t e3[3] = { 17, INT_FAST32_MIN, INT_FAST32_MAX };
+verify (TYPE_MINIMUM (int_fast32_t) == INT_FAST32_MIN);
+verify (TYPE_MAXIMUM (int_fast32_t) == INT_FAST32_MAX);
+verify_same_types (INT_FAST32_MIN, (int_fast32_t) 0 + 0);
+verify_same_types (INT_FAST32_MAX, (int_fast32_t) 0 + 0);
+
+#ifdef INT_FAST64_MAX
+int_fast64_t e4[3] = { 17, INT_FAST64_MIN, INT_FAST64_MAX };
+verify (TYPE_MINIMUM (int_fast64_t) == INT_FAST64_MIN);
+verify (TYPE_MAXIMUM (int_fast64_t) == INT_FAST64_MAX);
+verify_same_types (INT_FAST64_MIN, (int_fast64_t) 0 + 0);
+verify_same_types (INT_FAST64_MAX, (int_fast64_t) 0 + 0);
+#endif
+
+uint_fast8_t f1[2] = { 17, UINT_FAST8_MAX };
+verify (TYPE_MAXIMUM (uint_fast8_t) == UINT_FAST8_MAX);
+verify_same_types (UINT_FAST8_MAX, (uint_fast8_t) 0 + 0);
+
+uint_fast16_t f2[2] = { 17, UINT_FAST16_MAX };
+verify (TYPE_MAXIMUM (uint_fast16_t) == UINT_FAST16_MAX);
+verify_same_types (UINT_FAST16_MAX, (uint_fast16_t) 0 + 0);
+
+uint_fast32_t f3[2] = { 17, UINT_FAST32_MAX };
+verify (TYPE_MAXIMUM (uint_fast32_t) == UINT_FAST32_MAX);
+verify_same_types (UINT_FAST32_MAX, (uint_fast32_t) 0 + 0);
+
+#ifdef UINT_FAST64_MAX
+uint_fast64_t f4[2] = { 17, UINT_FAST64_MAX };
+verify (TYPE_MAXIMUM (uint_fast64_t) == UINT_FAST64_MAX);
+verify_same_types (UINT_FAST64_MAX, (uint_fast64_t) 0 + 0);
+#endif
+
+#if INT_FAST8_MIN && INT_FAST8_MAX && INT_FAST16_MIN && INT_FAST16_MAX && INT_FAST32_MIN && INT_FAST32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#if UINT_FAST8_MAX && UINT_FAST16_MAX && UINT_FAST32_MAX
+/* ok */
+#else
+err or;
+#endif
+
+/* 7.18.1.4. Integer types capable of holding object pointers */
+/* 7.18.2.4. Limits of integer types capable of holding object pointers */
+
+intptr_t g[3] = { 17, INTPTR_MIN, INTPTR_MAX };
+verify (sizeof (void *) <= sizeof (intptr_t));
+verify (TYPE_MINIMUM (intptr_t) == INTPTR_MIN);
+verify (TYPE_MAXIMUM (intptr_t) == INTPTR_MAX);
+verify_same_types (INTPTR_MIN, (intptr_t) 0 + 0);
+verify_same_types (INTPTR_MAX, (intptr_t) 0 + 0);
+
+uintptr_t h[2] = { 17, UINTPTR_MAX };
+verify (sizeof (void *) <= sizeof (uintptr_t));
+verify (TYPE_MAXIMUM (uintptr_t) == UINTPTR_MAX);
+verify_same_types (UINTPTR_MAX, (uintptr_t) 0 + 0);
+
+#if INTPTR_MIN && INTPTR_MAX && UINTPTR_MAX
+/* ok */
+#else
+err or;
+#endif
+
+/* 7.18.1.5. Greatest-width integer types */
+/* 7.18.2.5. Limits of greatest-width integer types */
+
+intmax_t i[3] = { INTMAX_C (17), INTMAX_MIN, INTMAX_MAX };
+verify (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
+verify (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
+verify_same_types (INTMAX_MIN, (intmax_t) 0 + 0);
+verify_same_types (INTMAX_MAX, (intmax_t) 0 + 0);
+
+uintmax_t j[2] = { UINTMAX_C (17), UINTMAX_MAX };
+verify (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
+verify_same_types (UINTMAX_MAX, (uintmax_t) 0 + 0);
+
+/* As of 2007, Sun C and HP-UX 10.20 cc don't support 'long long' constants in
+   the preprocessor.  */
+#if !(defined __SUNPRO_C || (defined __hpux && !defined __GNUC__))
+#if INTMAX_MIN && INTMAX_MAX && UINTMAX_MAX
+/* ok */
+#else
+err or;
+#endif
+#endif
+
+/* 7.18.3. Limits of other integer types */
+
+#include <stddef.h>
+
+verify (TYPE_MINIMUM (ptrdiff_t) == PTRDIFF_MIN);
+verify (TYPE_MAXIMUM (ptrdiff_t) == PTRDIFF_MAX);
+verify_same_types (PTRDIFF_MIN, (ptrdiff_t) 0 + 0);
+verify_same_types (PTRDIFF_MAX, (ptrdiff_t) 0 + 0);
+
+#if PTRDIFF_MIN && PTRDIFF_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#include <signal.h>
+
+verify (TYPE_MINIMUM (sig_atomic_t) == SIG_ATOMIC_MIN);
+verify (TYPE_MAXIMUM (sig_atomic_t) == SIG_ATOMIC_MAX);
+verify_same_types (SIG_ATOMIC_MIN, (sig_atomic_t) 0 + 0);
+verify_same_types (SIG_ATOMIC_MAX, (sig_atomic_t) 0 + 0);
+
+#if SIG_ATOMIC_MIN != 17 && SIG_ATOMIC_MAX
+/* ok */
+#else
+err or;
+#endif
+
+verify (TYPE_MAXIMUM (size_t) == SIZE_MAX);
+verify_same_types (SIZE_MAX, (size_t) 0 + 0);
+
+#if SIZE_MAX
+/* ok */
+#else
+err or;
+#endif
+
+#if HAVE_WCHAR_T
+verify (TYPE_MINIMUM (wchar_t) == WCHAR_MIN);
+verify (TYPE_MAXIMUM (wchar_t) == WCHAR_MAX);
+verify_same_types (WCHAR_MIN, (wchar_t) 0 + 0);
+verify_same_types (WCHAR_MAX, (wchar_t) 0 + 0);
+
+# if WCHAR_MIN != 17 && WCHAR_MAX
+/* ok */
+# else
+err or;
+# endif
+#endif
+
+#if HAVE_WINT_T
+# include <wchar.h>
+
+verify (TYPE_MINIMUM (wint_t) == WINT_MIN);
+verify (TYPE_MAXIMUM (wint_t) == WINT_MAX);
+verify_same_types (WINT_MIN, (wint_t) 0 + 0);
+verify_same_types (WINT_MAX, (wint_t) 0 + 0);
+
+# if WINT_MIN != 17 && WINT_MAX
+/* ok */
+# else
+err or;
+# endif
+#endif
+
+/* 7.18.4. Macros for integer constants */
+
+verify (INT8_C (17) == 17);
+verify_same_types (INT8_C (17), (int_least8_t)0 + 0);
+verify (UINT8_C (17) == 17);
+verify_same_types (UINT8_C (17), (uint_least8_t)0 + 0);
+
+verify (INT16_C (17) == 17);
+verify_same_types (INT16_C (17), (int_least16_t)0 + 0);
+verify (UINT16_C (17) == 17);
+verify_same_types (UINT16_C (17), (uint_least16_t)0 + 0);
+
+verify (INT32_C (17) == 17);
+verify_same_types (INT32_C (17), (int_least32_t)0 + 0);
+verify (UINT32_C (17) == 17);
+verify_same_types (UINT32_C (17), (uint_least32_t)0 + 0);
+
+#ifdef INT64_C
+verify (INT64_C (17) == 17);
+verify_same_types (INT64_C (17), (int_least64_t)0 + 0);
+#endif
+#ifdef UINT64_C
+verify (UINT64_C (17) == 17);
+verify_same_types (UINT64_C (17), (uint_least64_t)0 + 0);
+#endif
+
+verify (INTMAX_C (17) == 17);
+verify_same_types (INTMAX_C (17), (intmax_t)0 + 0);
+verify (UINTMAX_C (17) == 17);
+verify_same_types (UINTMAX_C (17), (uintmax_t)0 + 0);
+
+/* Use _GL_VERIFY (with a fixed-length diagnostic string) rather than verify,
+   because the latter would require forming each stringified expression, and
+   many of these would be so long as to trigger a warning/error like this:
+
+   test-stdint.c:407:1: error: string length '6980' is greater than the \
+     length '4095' ISO C99 compilers are required to support \
+     [-Werror=overlength-strings]
+  */
+#define verify_width(width, min, max) \
+  _GL_VERIFY ((max) >> ((width) - 1 - ((min) < 0)) == 1, \
+              "verify_width check", -)
+
+/* Macros specified by ISO/IEC TS 18661-1:2014.  */
+
+#ifdef INT8_MAX
+verify_width (INT8_WIDTH, INT8_MIN, INT8_MAX);
+#endif
+#ifdef UINT8_MAX
+verify_width (UINT8_WIDTH, 0, UINT8_MAX);
+#endif
+#ifdef INT16_MAX
+verify_width (INT16_WIDTH, INT16_MIN, INT16_MAX);
+#endif
+#ifdef UINT16_MAX
+verify_width (UINT16_WIDTH, 0, UINT16_MAX);
+#endif
+#ifdef INT32_MAX
+verify_width (INT32_WIDTH, INT32_MIN, INT32_MAX);
+#endif
+#ifdef UINT32_MAX
+verify_width (UINT32_WIDTH, 0, UINT32_MAX);
+#endif
+#ifdef INT64_MAX
+verify_width (INT64_WIDTH, INT64_MIN, INT64_MAX);
+#endif
+#ifdef UINT64_MAX
+verify_width (UINT64_WIDTH, 0, UINT64_MAX);
+#endif
+verify_width (INT_LEAST8_WIDTH, INT_LEAST8_MIN, INT_LEAST8_MAX);
+verify_width (UINT_LEAST8_WIDTH, 0, UINT_LEAST8_MAX);
+verify_width (INT_LEAST16_WIDTH, INT_LEAST16_MIN, INT_LEAST16_MAX);
+verify_width (UINT_LEAST16_WIDTH, 0, UINT_LEAST16_MAX);
+verify_width (INT_LEAST32_WIDTH, INT_LEAST32_MIN, INT_LEAST32_MAX);
+verify_width (UINT_LEAST32_WIDTH, 0, UINT_LEAST32_MAX);
+verify_width (INT_LEAST64_WIDTH, INT_LEAST64_MIN, INT_LEAST64_MAX);
+verify_width (UINT_LEAST64_WIDTH, 0, UINT_LEAST64_MAX);
+verify_width (INT_FAST8_WIDTH, INT_FAST8_MIN, INT_FAST8_MAX);
+verify_width (UINT_FAST8_WIDTH, 0, UINT_FAST8_MAX);
+verify_width (INT_FAST16_WIDTH, INT_FAST16_MIN, INT_FAST16_MAX);
+verify_width (UINT_FAST16_WIDTH, 0, UINT_FAST16_MAX);
+verify_width (INT_FAST32_WIDTH, INT_FAST32_MIN, INT_FAST32_MAX);
+verify_width (UINT_FAST32_WIDTH, 0, UINT_FAST32_MAX);
+verify_width (INT_FAST64_WIDTH, INT_FAST64_MIN, INT_FAST64_MAX);
+verify_width (UINT_FAST64_WIDTH, 0, UINT_FAST64_MAX);
+verify_width (INTPTR_WIDTH, INTPTR_MIN, INTPTR_MAX);
+verify_width (UINTPTR_WIDTH, 0, UINTPTR_MAX);
+verify_width (INTMAX_WIDTH, INTMAX_MIN, INTMAX_MAX);
+verify_width (UINTMAX_WIDTH, 0, UINTMAX_MAX);
+verify_width (PTRDIFF_WIDTH, PTRDIFF_MIN, PTRDIFF_MAX);
+verify_width (SIZE_WIDTH, 0, SIZE_MAX);
+verify_width (WCHAR_WIDTH, WCHAR_MIN, WCHAR_MAX);
+#ifdef WINT_MAX
+verify_width (WINT_WIDTH, WINT_MIN, WINT_MAX);
+#endif
+#ifdef SIG_ATOMIC_MAX
+verify_width (SIG_ATOMIC_WIDTH, SIG_ATOMIC_MIN, SIG_ATOMIC_MAX);
+#endif
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-stdio.c b/src/gl/tests/test-stdio.c
new file mode 100644
index 0000000..8fd000a
--- /dev/null
+++ b/src/gl/tests/test-stdio.c
@@ -0,0 +1,43 @@
+/* Test of <stdio.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "verify.h"
+
+/* Check that the various SEEK_* macros are defined.  */
+int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+/* Check that the types are all defined.  */
+fpos_t t1;
+off_t t2;
+size_t t3;
+ssize_t t4;
+va_list t5;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-stdlib.c b/src/gl/tests/test-stdlib.c
new file mode 100644
index 0000000..427263e
--- /dev/null
+++ b/src/gl/tests/test-stdlib.c
@@ -0,0 +1,54 @@
+/* Test of <stdlib.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "verify.h"
+
+/* Check that EXIT_SUCCESS is 0, per POSIX.  */
+static int exitcode = EXIT_SUCCESS;
+#if EXIT_SUCCESS
+"oops"
+#endif
+
+/* Check for GNU value (not guaranteed by POSIX, but is guaranteed by
+   gnulib).  */
+#if EXIT_FAILURE != 1
+"oops"
+#endif
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+#if GNULIB_TEST_SYSTEM_POSIX
+# include "test-sys_wait.h"
+#else
+# define test_sys_wait_macros() 0
+#endif
+
+int
+main (void)
+{
+  if (test_sys_wait_macros ())
+    return 1;
+
+  return exitcode;
+}
diff --git a/src/gl/tests/test-strerror.c b/src/gl/tests/test-strerror.c
new file mode 100644
index 0000000..2e4125b
--- /dev/null
+++ b/src/gl/tests/test-strerror.c
@@ -0,0 +1,75 @@
+/* Test of strerror() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2007.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (strerror, char *, (int));
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  char *str;
+
+  errno = 0;
+  str = strerror (EACCES);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0);
+
+  errno = 0;
+  str = strerror (ETIMEDOUT);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0);
+
+  errno = 0;
+  str = strerror (EOVERFLOW);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0);
+
+  /* POSIX requires strerror (0) to succeed.  Reject use of "Unknown
+     error", but allow "Success", "No error", or even Solaris' "Error
+     0" which are distinct patterns from true out-of-range strings.
+     http://austingroupbugs.net/view.php?id=382  */
+  errno = 0;
+  str = strerror (0);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0);
+  ASSERT (strstr (str, "nknown") == NULL);
+  ASSERT (strstr (str, "ndefined") == NULL);
+
+  /* POSIX requires strerror to produce a non-NULL result for all
+     inputs; as an extension, we also guarantee a non-empty result.
+     Reporting EINVAL is optional.  */
+  errno = 0;
+  str = strerror (-3);
+  ASSERT (str);
+  ASSERT (*str);
+  ASSERT (errno == 0 || errno == EINVAL);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-strerror_r.c b/src/gl/tests/test-strerror_r.c
new file mode 100644
index 0000000..6e72194
--- /dev/null
+++ b/src/gl/tests/test-strerror_r.c
@@ -0,0 +1,178 @@
+/* Test of strerror_r() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (strerror_r, int, (int, char *, size_t));
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  char buf[100];
+  int ret;
+
+  /* Test results with valid errnum and enough room.  */
+
+  errno = 0;
+  buf[0] = '\0';
+  ASSERT (strerror_r (EACCES, buf, sizeof buf) == 0);
+  ASSERT (buf[0] != '\0');
+  ASSERT (errno == 0);
+  ASSERT (strlen (buf) < sizeof buf);
+
+  errno = 0;
+  buf[0] = '\0';
+  ASSERT (strerror_r (ETIMEDOUT, buf, sizeof buf) == 0);
+  ASSERT (buf[0] != '\0');
+  ASSERT (errno == 0);
+  ASSERT (strlen (buf) < sizeof buf);
+
+  errno = 0;
+  buf[0] = '\0';
+  ASSERT (strerror_r (EOVERFLOW, buf, sizeof buf) == 0);
+  ASSERT (buf[0] != '\0');
+  ASSERT (errno == 0);
+  ASSERT (strlen (buf) < sizeof buf);
+
+  /* POSIX requires strerror (0) to succeed.  Reject use of "Unknown
+     error", but allow "Success", "No error", or even Solaris' "Error
+     0" which are distinct patterns from true out-of-range strings.
+     http://austingroupbugs.net/view.php?id=382  */
+  errno = 0;
+  buf[0] = '\0';
+  ret = strerror_r (0, buf, sizeof buf);
+  ASSERT (ret == 0);
+  ASSERT (buf[0]);
+  ASSERT (errno == 0);
+  ASSERT (strstr (buf, "nknown") == NULL);
+  ASSERT (strstr (buf, "ndefined") == NULL);
+
+  /* Test results with out-of-range errnum and enough room.  POSIX
+     allows an empty string on success, and allows an unchanged buf on
+     error, but these are not useful, so we guarantee contents.  */
+  errno = 0;
+  buf[0] = '^';
+  ret = strerror_r (-3, buf, sizeof buf);
+  ASSERT (ret == 0 || ret == EINVAL);
+  ASSERT (buf[0] != '^');
+  ASSERT (*buf);
+  ASSERT (errno == 0);
+  ASSERT (strlen (buf) < sizeof buf);
+
+  /* Test results with a too small buffer.  POSIX requires an error;
+     only ERANGE for 0 and valid errors, and a choice of ERANGE or
+     EINVAL for out-of-range values.  On error, POSIX permits buf to
+     be empty, unchanged, or unterminated, but these are not useful,
+     so we guarantee NUL-terminated truncated contents for all but
+     size 0.  http://austingroupbugs.net/view.php?id=398.  Also ensure
+     that no out-of-bounds writes occur.  */
+  {
+    int errs[] = { EACCES, 0, -3, };
+    int j;
+
+    buf[sizeof buf - 1] = '\0';
+    for (j = 0; j < SIZEOF (errs); j++)
+      {
+        int err = errs[j];
+        char buf2[sizeof buf] = "";
+        size_t len;
+        size_t i;
+
+        strerror_r (err, buf2, sizeof buf2);
+        len = strlen (buf2);
+        ASSERT (len < sizeof buf);
+
+        for (i = 0; i <= len; i++)
+          {
+            memset (buf, '^', sizeof buf - 1);
+            errno = 0;
+            ret = strerror_r (err, buf, i);
+            ASSERT (errno == 0);
+            if (j == 2)
+              ASSERT (ret == ERANGE || ret == EINVAL);
+            else
+              ASSERT (ret == ERANGE);
+            if (i)
+              {
+                ASSERT (strncmp (buf, buf2, i - 1) == 0);
+                ASSERT (buf[i - 1] == '\0');
+              }
+            ASSERT (strspn (buf + i, "^") == sizeof buf - 1 - i);
+          }
+
+        strcpy (buf, "BADFACE");
+        errno = 0;
+        ret = strerror_r (err, buf, len + 1);
+        ASSERT (ret != ERANGE);
+        ASSERT (errno == 0);
+        ASSERT (strcmp (buf, buf2) == 0);
+      }
+  }
+
+#if GNULIB_STRERROR
+  /* Test that strerror_r does not clobber strerror buffer.  On some
+     platforms, this test can only succeed if gnulib also replaces
+     strerror.  */
+  {
+    const char *msg1;
+    const char *msg2;
+    const char *msg3;
+    const char *msg4;
+    char *str1;
+    char *str2;
+    char *str3;
+    char *str4;
+
+    msg1 = strerror (ENOENT);
+    ASSERT (msg1);
+    str1 = strdup (msg1);
+    ASSERT (str1);
+
+    msg2 = strerror (ERANGE);
+    ASSERT (msg2);
+    str2 = strdup (msg2);
+    ASSERT (str2);
+
+    msg3 = strerror (-4);
+    ASSERT (msg3);
+    str3 = strdup (msg3);
+    ASSERT (str3);
+
+    msg4 = strerror (1729576);
+    ASSERT (msg4);
+    str4 = strdup (msg4);
+    ASSERT (str4);
+
+    strerror_r (EACCES, buf, sizeof buf);
+    strerror_r (-5, buf, sizeof buf);
+    ASSERT (STREQ (msg4, str4));
+
+    free (str1);
+    free (str2);
+    free (str3);
+    free (str4);
+  }
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-string.c b/src/gl/tests/test-string.c
new file mode 100644
index 0000000..bad996f
--- /dev/null
+++ b/src/gl/tests/test-string.c
@@ -0,0 +1,33 @@
+/* Test of <string.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "verify.h"
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-strings.c b/src/gl/tests/test-strings.c
new file mode 100644
index 0000000..4ac1ac5
--- /dev/null
+++ b/src/gl/tests/test-strings.c
@@ -0,0 +1,27 @@
+/* Test of <strings.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <strings.h>
+
+int
+main ()
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-strnlen.c b/src/gl/tests/test-strnlen.c
new file mode 100644
index 0000000..6470ebc
--- /dev/null
+++ b/src/gl/tests/test-strnlen.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2010-2021 Free Software Foundation, Inc.
+ * Written by Eric Blake
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (strnlen, size_t, (char const *, size_t));
+
+#include <stdlib.h>
+
+#include "zerosize-ptr.h"
+#include "macros.h"
+
+int
+main (void)
+{
+  size_t i;
+  char *page_boundary = (char *) zerosize_ptr ();
+  if (!page_boundary)
+    {
+      page_boundary = malloc (0x1000);
+      ASSERT (page_boundary);
+      page_boundary += 0x1000;
+    }
+
+  /* Basic behavior tests.  */
+  ASSERT (strnlen ("a", 0) == 0);
+  ASSERT (strnlen ("a", 1) == 1);
+  ASSERT (strnlen ("a", 2) == 1);
+  ASSERT (strnlen ("", 0x100000) == 0);
+
+  /* Memory fence and alignment testing.  */
+  for (i = 0; i < 512; i++)
+    {
+      char *start = page_boundary - i;
+      size_t j = i;
+      memset (start, 'x', i);
+      do
+        {
+          if (i != j)
+            {
+              start[j] = 0;
+              ASSERT (strnlen (start, i + j) == j);
+            }
+          ASSERT (strnlen (start, i) == j);
+          ASSERT (strnlen (start, j) == j);
+        }
+      while (j--);
+    }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-strtoll.c b/src/gl/tests/test-strtoll.c
new file mode 100644
index 0000000..5f2b193
--- /dev/null
+++ b/src/gl/tests/test-strtoll.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2011-2021 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "signature.h"
+#ifndef strtoll
+SIGNATURE_CHECK (strtoll, long long, (const char *, char **, int));
+#endif
+
+#include <errno.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  /* Subject sequence empty or invalid.  */
+  {
+    const char input[] = "";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " ";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " +";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+  {
+    const char input[] = " -";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input);
+    ASSERT (errno == 0 || errno == EINVAL);
+  }
+
+  /* Simple integer values.  */
+  {
+    const char input[] = "0";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+0";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-0";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "23";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 2);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = " 23";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "+23";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-23";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == -23);
+    ASSERT (ptr == input + 3);
+    ASSERT (errno == 0);
+  }
+
+  /* Large integer values.  */
+  {
+    const char input[] = "2147483647";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 2147483647);
+    ASSERT (ptr == input + 10);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "-2147483648";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == -2147483647 - 1);
+    ASSERT (ptr == input + 11);
+    ASSERT (errno == 0);
+  }
+  if (sizeof (long long) > sizeof (int))
+    {
+      const char input[] = "4294967295";
+      char *ptr;
+      long long result;
+      errno = 0;
+      result = strtoll (input, &ptr, 10);
+      ASSERT (result == 65535LL * 65537LL);
+      ASSERT (ptr == input + 10);
+      ASSERT (errno == 0);
+    }
+
+  /* Hexadecimal integer syntax.  */
+  {
+    const char input[] = "0x2A";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0LL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x2A";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 16);
+    ASSERT (result == 42LL);
+    ASSERT (ptr == input + 4);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x2A";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 0);
+    ASSERT (result == 42LL);
+    ASSERT (ptr == input + 4);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 10);
+    ASSERT (result == 0LL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 16);
+    ASSERT (result == 0LL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+  {
+    const char input[] = "0x";
+    char *ptr;
+    long long result;
+    errno = 0;
+    result = strtoll (input, &ptr, 0);
+    ASSERT (result == 0LL);
+    ASSERT (ptr == input + 1);
+    ASSERT (errno == 0);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-strverscmp.c b/src/gl/tests/test-strverscmp.c
new file mode 100644
index 0000000..9703f7a
--- /dev/null
+++ b/src/gl/tests/test-strverscmp.c
@@ -0,0 +1,59 @@
+/* Test of strverscmp() function.
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2008.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (strverscmp, int, (const char *, const char *));
+
+#include "macros.h"
+
+int
+main (void)
+{
+  ASSERT (strverscmp ("", "") == 0);
+  ASSERT (strverscmp ("a", "a") == 0);
+  ASSERT (strverscmp ("a", "b") < 0);
+  ASSERT (strverscmp ("b", "a") > 0);
+  ASSERT (strverscmp ("000", "00") < 0);
+  ASSERT (strverscmp ("00", "000") > 0);
+  ASSERT (strverscmp ("a0", "a") > 0);
+  ASSERT (strverscmp ("00", "01") < 0);
+  ASSERT (strverscmp ("01", "010") < 0);
+  ASSERT (strverscmp ("010", "09") < 0);
+  ASSERT (strverscmp ("09", "0") < 0);
+  ASSERT (strverscmp ("9", "10") < 0);
+  ASSERT (strverscmp ("0a", "0") > 0);
+
+  /* From glibc bug 9913.  */
+  {
+    static char const a[] = "B0075022800016.gbp.corp.com";
+    static char const b[] = "B007502280067.gbp.corp.com";
+    static char const c[] = "B007502357019.GBP.CORP.COM";
+    ASSERT (strverscmp (a, b) < 0);
+    ASSERT (strverscmp (b, c) < 0);
+    ASSERT (strverscmp (a, c) < 0);
+    ASSERT (strverscmp (b, a) > 0);
+    ASSERT (strverscmp (c, b) > 0);
+    ASSERT (strverscmp (c, a) > 0);
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-symlink.c b/src/gl/tests/test-symlink.c
new file mode 100644
index 0000000..95a3fbf
--- /dev/null
+++ b/src/gl/tests/test-symlink.c
@@ -0,0 +1,47 @@
+/* Tests of symlink.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (symlink, int, (char const *, char const *));
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#include "ignore-value.h"
+#include "macros.h"
+
+#define BASE "test-symlink.t"
+
+#include "test-symlink.h"
+
+int
+main (void)
+{
+  /* Remove any leftovers from a previous partial run.  */
+  ignore_value (system ("rm -rf " BASE "*"));
+
+  return test_symlink (symlink, true);
+}
diff --git a/src/gl/tests/test-symlink.h b/src/gl/tests/test-symlink.h
new file mode 100644
index 0000000..3128d0a
--- /dev/null
+++ b/src/gl/tests/test-symlink.h
@@ -0,0 +1,96 @@
+/* Tests of symlink.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+/* This file is designed to test both symlink(a,b) and
+   symlinkat(a,AT_FDCWD,b).  FUNC is the function to test.  Assumes
+   that BASE and ASSERT are already defined, and that appropriate
+   headers are already included.  If PRINT, warn before skipping
+   symlink tests with status 77.  */
+
+static int
+test_symlink (int (*func) (char const *, char const *), bool print)
+{
+  if (func ("nowhere", BASE "link1"))
+    {
+      if (print)
+        fputs ("skipping test: symlinks not supported on this file system\n",
+               stderr);
+      return 77;
+    }
+
+  /* Some systems allow the creation of 0-length symlinks as a synonym
+     for "."; but most reject it.  */
+  {
+    int status;
+    errno = 0;
+    status = func ("", BASE "link2");
+    if (status == -1)
+      ASSERT (errno == ENOENT || errno == EINVAL);
+    else
+      {
+        ASSERT (status == 0);
+        ASSERT (unlink (BASE "link2") == 0);
+      }
+  }
+
+  /* Sanity checks of failures.  */
+  errno = 0;
+  ASSERT (func ("nowhere", "") == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("nowhere", ".") == -1);
+  ASSERT (errno == EEXIST || errno == EINVAL);
+  errno = 0;
+  ASSERT (func ("somewhere", BASE "link1") == -1);
+  ASSERT (errno == EEXIST);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "link2/") == -1);
+  ASSERT (errno == ENOTDIR || errno == ENOENT);
+  ASSERT (mkdir (BASE "dir", 0700) == 0);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "dir") == -1);
+  ASSERT (errno == EEXIST);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "dir/") == -1);
+  ASSERT (errno == EEXIST || errno == EINVAL
+          || errno == ENOENT /* Lustre FS on Linux */);
+  ASSERT (close (creat (BASE "file", 0600)) == 0);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "file") == -1);
+  ASSERT (errno == EEXIST);
+  errno = 0;
+  ASSERT (func ("nowhere", BASE "file/") == -1);
+  ASSERT (errno == EEXIST || errno == ENOTDIR || errno == ENOENT);
+
+  /* Trailing slash must always be rejected.  */
+  ASSERT (unlink (BASE "link1") == 0);
+  ASSERT (func (BASE "link2", BASE "link1") == 0);
+  errno = 0;
+  ASSERT (func (BASE "nowhere", BASE "link1/") == -1);
+  ASSERT (errno == EEXIST || errno == ENOTDIR || errno == ENOENT);
+  errno = 0;
+  ASSERT (unlink (BASE "link2") == -1);
+  ASSERT (errno == ENOENT);
+
+  /* Cleanup.  */
+  ASSERT (rmdir (BASE "dir") == 0);
+  ASSERT (unlink (BASE "file") == 0);
+  ASSERT (unlink (BASE "link1") == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-sys_ioctl.c b/src/gl/tests/test-sys_ioctl.c
new file mode 100644
index 0000000..151bf31
--- /dev/null
+++ b/src/gl/tests/test-sys_ioctl.c
@@ -0,0 +1,27 @@
+/* Test of <sys/ioctl.h> substitute.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <sys/ioctl.h>
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-sys_select.c b/src/gl/tests/test-sys_select.c
new file mode 100644
index 0000000..48667ce
--- /dev/null
+++ b/src/gl/tests/test-sys_select.c
@@ -0,0 +1,59 @@
+/* Test of <sys/select.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <sys/select.h>
+
+#include "signature.h"
+
+/* The following may be macros without underlying functions, so only
+   check signature if they are not macros.  */
+#ifndef FD_CLR
+SIGNATURE_CHECK (FD_CLR, void, (int, fd_set *));
+#endif
+#ifndef FD_ISSET
+SIGNATURE_CHECK (FD_ISSET, void, (int, fd_set *));
+#endif
+#ifndef FD_SET
+SIGNATURE_CHECK (FD_SET, int, (int, fd_set *));
+#endif
+#ifndef FD_ZERO
+SIGNATURE_CHECK (FD_ZERO, void, (fd_set *));
+#endif
+
+/* Check that the 'struct timeval' type is defined.  */
+struct timeval a;
+
+/* Check that a.tv_sec is wide enough to hold a time_t, ignoring
+   signedness issues.  */
+typedef int verify_tv_sec_type[sizeof (time_t) <= sizeof (a.tv_sec) ? 1 : -1];
+
+/* Check that sigset_t is defined.  */
+sigset_t t2;
+
+int
+main (void)
+{
+  /* Check that FD_ZERO can be used.  This should not yield a warning
+     such as "warning: implicit declaration of function 'memset'".  */
+  fd_set fds;
+  FD_ZERO (&fds);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-sys_socket.c b/src/gl/tests/test-sys_socket.c
new file mode 100644
index 0000000..49f4958
--- /dev/null
+++ b/src/gl/tests/test-sys_socket.c
@@ -0,0 +1,68 @@
+/* Test of <sys/socket.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <sys/socket.h>
+
+#include <errno.h>
+
+#if HAVE_SHUTDOWN
+/* Check some integer constant expressions.  */
+int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };
+#endif
+
+/* Check that the 'socklen_t' type is defined.  */
+socklen_t t1;
+
+/* Check that the 'size_t' and 'ssize_t' types are defined.  */
+size_t t2;
+ssize_t t3;
+
+/* Check that 'struct iovec' is defined.  */
+struct iovec io;
+
+/* Check that a minimal set of 'struct msghdr' is defined.  */
+struct msghdr msg;
+
+int
+main (void)
+{
+  struct sockaddr_storage x;
+  sa_family_t i;
+
+  /* Check some errno values.  */
+  switch (ENOTSOCK)
+    {
+    case ENOTSOCK:
+    case EADDRINUSE:
+    case ENETRESET:
+    case ECONNABORTED:
+    case ECONNRESET:
+    case ENOTCONN:
+    case ESHUTDOWN:
+      break;
+    }
+
+  x.ss_family = 42;
+  i = 42;
+  msg.msg_iov = &io;
+
+  return (x.ss_family - i + msg.msg_namelen + msg.msg_iov->iov_len
+          + msg.msg_iovlen);
+}
diff --git a/src/gl/tests/test-sys_stat.c b/src/gl/tests/test-sys_stat.c
new file mode 100644
index 0000000..e5f88c0
--- /dev/null
+++ b/src/gl/tests/test-sys_stat.c
@@ -0,0 +1,340 @@
+/* Test of <sys/stat.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <sys/stat.h>
+
+#include "verify.h"
+
+/* Check the existence of some macros.  */
+int a[] =
+  {
+    S_IFMT,
+#ifdef S_IFBLK /* missing on MSVC */
+    S_IFBLK,
+#endif
+    S_IFCHR, S_IFDIR, S_IFIFO, S_IFREG,
+#ifdef S_IFLNK /* missing on native Windows and DJGPP */
+    S_IFLNK,
+#endif
+#ifdef S_IFSOCK /* missing on native Windows and DJGPP */
+    S_IFSOCK,
+#endif
+    S_IRWXU, S_IRUSR, S_IWUSR, S_IXUSR,
+    S_IRWXG, S_IRGRP, S_IWGRP, S_IXGRP,
+    S_IRWXO, S_IROTH, S_IWOTH, S_IXOTH,
+    S_ISUID, S_ISGID, S_ISVTX,
+    S_ISBLK (S_IFREG),
+    S_ISCHR (S_IFREG),
+    S_ISDIR (S_IFREG),
+    S_ISFIFO (S_IFREG),
+    S_ISREG (S_IFREG),
+    S_ISLNK (S_IFREG),
+    S_ISSOCK (S_IFREG),
+    S_ISDOOR (S_IFREG),
+    S_ISMPB (S_IFREG),
+    S_ISMPX (S_IFREG),
+    S_ISNAM (S_IFREG),
+    S_ISNWK (S_IFREG),
+    S_ISPORT (S_IFREG),
+    S_ISCTG (S_IFREG),
+    S_ISOFD (S_IFREG),
+    S_ISOFL (S_IFREG),
+    S_ISWHT (S_IFREG)
+  };
+
+/* Sanity checks.  */
+
+verify (S_IRWXU == (S_IRUSR | S_IWUSR | S_IXUSR));
+verify (S_IRWXG == (S_IRGRP | S_IWGRP | S_IXGRP));
+verify (S_IRWXO == (S_IROTH | S_IWOTH | S_IXOTH));
+
+#ifdef S_IFBLK
+verify (S_ISBLK (S_IFBLK));
+#endif
+verify (!S_ISBLK (S_IFCHR));
+verify (!S_ISBLK (S_IFDIR));
+verify (!S_ISBLK (S_IFIFO));
+verify (!S_ISBLK (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISBLK (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISBLK (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISCHR (S_IFBLK));
+#endif
+verify (S_ISCHR (S_IFCHR));
+verify (!S_ISCHR (S_IFDIR));
+verify (!S_ISCHR (S_IFIFO));
+verify (!S_ISCHR (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISCHR (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISCHR (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISDIR (S_IFBLK));
+#endif
+verify (!S_ISDIR (S_IFCHR));
+verify (S_ISDIR (S_IFDIR));
+verify (!S_ISDIR (S_IFIFO));
+verify (!S_ISDIR (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISDIR (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISDIR (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISFIFO (S_IFBLK));
+#endif
+verify (!S_ISFIFO (S_IFCHR));
+verify (!S_ISFIFO (S_IFDIR));
+verify (S_ISFIFO (S_IFIFO));
+verify (!S_ISFIFO (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISFIFO (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISFIFO (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISREG (S_IFBLK));
+#endif
+verify (!S_ISREG (S_IFCHR));
+verify (!S_ISREG (S_IFDIR));
+verify (!S_ISREG (S_IFIFO));
+verify (S_ISREG (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISREG (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISREG (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISLNK (S_IFBLK));
+#endif
+verify (!S_ISLNK (S_IFCHR));
+verify (!S_ISLNK (S_IFDIR));
+verify (!S_ISLNK (S_IFIFO));
+verify (!S_ISLNK (S_IFREG));
+#ifdef S_IFLNK
+verify (S_ISLNK (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISLNK (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISSOCK (S_IFBLK));
+#endif
+verify (!S_ISSOCK (S_IFCHR));
+verify (!S_ISSOCK (S_IFDIR));
+verify (!S_ISSOCK (S_IFIFO));
+verify (!S_ISSOCK (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISSOCK (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (S_ISSOCK (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISDOOR (S_IFBLK));
+#endif
+verify (!S_ISDOOR (S_IFCHR));
+verify (!S_ISDOOR (S_IFDIR));
+verify (!S_ISDOOR (S_IFIFO));
+verify (!S_ISDOOR (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISDOOR (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISDOOR (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISMPB (S_IFBLK));
+#endif
+verify (!S_ISMPB (S_IFCHR));
+verify (!S_ISMPB (S_IFDIR));
+verify (!S_ISMPB (S_IFIFO));
+verify (!S_ISMPB (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISMPB (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISMPB (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISMPX (S_IFBLK));
+#endif
+verify (!S_ISMPX (S_IFCHR));
+verify (!S_ISMPX (S_IFDIR));
+verify (!S_ISMPX (S_IFIFO));
+verify (!S_ISMPX (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISMPX (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISMPX (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISNAM (S_IFBLK));
+#endif
+verify (!S_ISNAM (S_IFCHR));
+verify (!S_ISNAM (S_IFDIR));
+verify (!S_ISNAM (S_IFIFO));
+verify (!S_ISNAM (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISNAM (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISNAM (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISNWK (S_IFBLK));
+#endif
+verify (!S_ISNWK (S_IFCHR));
+verify (!S_ISNWK (S_IFDIR));
+verify (!S_ISNWK (S_IFIFO));
+verify (!S_ISNWK (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISNWK (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISNWK (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISPORT (S_IFBLK));
+#endif
+verify (!S_ISPORT (S_IFCHR));
+verify (!S_ISPORT (S_IFDIR));
+verify (!S_ISPORT (S_IFIFO));
+verify (!S_ISPORT (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISPORT (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISPORT (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISCTG (S_IFBLK));
+#endif
+verify (!S_ISCTG (S_IFCHR));
+verify (!S_ISCTG (S_IFDIR));
+verify (!S_ISCTG (S_IFIFO));
+verify (!S_ISCTG (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISCTG (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISCTG (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISOFD (S_IFBLK));
+#endif
+verify (!S_ISOFD (S_IFCHR));
+verify (!S_ISOFD (S_IFDIR));
+verify (!S_ISOFD (S_IFIFO));
+verify (!S_ISOFD (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISOFD (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISOFD (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISOFL (S_IFBLK));
+#endif
+verify (!S_ISOFL (S_IFCHR));
+verify (!S_ISOFL (S_IFDIR));
+verify (!S_ISOFL (S_IFIFO));
+verify (!S_ISOFL (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISOFL (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISOFL (S_IFSOCK));
+#endif
+
+#ifdef S_IFBLK
+verify (!S_ISWHT (S_IFBLK));
+#endif
+verify (!S_ISWHT (S_IFCHR));
+verify (!S_ISWHT (S_IFDIR));
+verify (!S_ISWHT (S_IFIFO));
+verify (!S_ISWHT (S_IFREG));
+#ifdef S_IFLNK
+verify (!S_ISWHT (S_IFLNK));
+#endif
+#ifdef S_IFSOCK
+verify (!S_ISWHT (S_IFSOCK));
+#endif
+
+/* POSIX 2008 requires traditional encoding of permission constants.  */
+verify (S_IRWXU == 00700);
+verify (S_IRUSR == 00400);
+verify (S_IWUSR == 00200);
+verify (S_IXUSR == 00100);
+verify (S_IRWXG == 00070);
+verify (S_IRGRP == 00040);
+verify (S_IWGRP == 00020);
+verify (S_IXGRP == 00010);
+verify (S_IRWXO == 00007);
+verify (S_IROTH == 00004);
+verify (S_IWOTH == 00002);
+verify (S_IXOTH == 00001);
+verify (S_ISUID == 04000);
+verify (S_ISGID == 02000);
+verify (S_ISVTX == 01000);
+
+#if ((0 <= UTIME_NOW && UTIME_NOW < 1000000000)           \
+     || (0 <= UTIME_OMIT && UTIME_OMIT < 1000000000)      \
+     || UTIME_NOW == UTIME_OMIT)
+invalid UTIME macros
+#endif
+
+/* Check the existence of some types.  */
+nlink_t t1;
+off_t t2;
+mode_t t3;
+
+struct timespec st;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-sys_time.c b/src/gl/tests/test-sys_time.c
new file mode 100644
index 0000000..764321b
--- /dev/null
+++ b/src/gl/tests/test-sys_time.c
@@ -0,0 +1,34 @@
+/* Test of <sys/time.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <sys/time.h>
+
+/* Check that the 'struct timeval' type is defined.  */
+struct timeval a;
+
+/* Check that a.tv_sec is wide enough to hold a time_t, ignoring
+   signedness issues.  */
+typedef int verify_tv_sec_type[sizeof (time_t) <= sizeof (a.tv_sec) ? 1 : -1];
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-sys_types.c b/src/gl/tests/test-sys_types.c
new file mode 100644
index 0000000..a0bcc04
--- /dev/null
+++ b/src/gl/tests/test-sys_types.c
@@ -0,0 +1,34 @@
+/* Test of <sys/types.h> substitute.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include <sys/types.h>
+
+/* Check that the types are all defined.  */
+pid_t t1;
+size_t t2;
+ssize_t t3;
+off_t t4;
+mode_t t5;
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-sys_uio.c b/src/gl/tests/test-sys_uio.c
new file mode 100644
index 0000000..723f36b
--- /dev/null
+++ b/src/gl/tests/test-sys_uio.c
@@ -0,0 +1,32 @@
+/* Test of <sys/uio.h> substitute.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <eblake@redhat.com>, 2011.  */
+
+#include <config.h>
+
+#include <sys/uio.h>
+
+/* Check that necessary types are defined.  */
+size_t a;
+ssize_t b;
+struct iovec c;
+
+int
+main (void)
+{
+  return a + b + !!c.iov_base + c.iov_len;
+}
diff --git a/src/gl/tests/test-sys_wait.h b/src/gl/tests/test-sys_wait.h
new file mode 100644
index 0000000..4508f57
--- /dev/null
+++ b/src/gl/tests/test-sys_wait.h
@@ -0,0 +1,53 @@
+/* Test of macros shared between <sys/wait.h> and <stdlib.h>.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2010.  */
+
+static int
+test_sys_wait_macros (void)
+{
+  /* Check subset of <sys/wait.h> macros that must be visible here.
+     Note that some of these macros are only portable when operating
+     on an lvalue.  */
+  int i;
+  for (i = 0; i < 0x8000; i = (i ? i << 1 : 1))
+    {
+      /* POSIX requires that for all valid process statuses, that
+         exactly one of these three macros is true.  But not all
+         possible 16-bit values map to valid process status.
+         Traditionally, 8 of the bits are for WIFEXITED, 7 of the bits
+         to tell between WIFSIGNALED and WIFSTOPPED, and either 0x80
+         or 0x8000 to flag that core was also dumped.  Since we don't
+         know which byte is WIFEXITED, we skip the both possible bits
+         that can signal core dump.  */
+      if (i == 0x80)
+        continue;
+      if (!!WIFSIGNALED (i) + !!WIFEXITED (i) + !!WIFSTOPPED (i) != 1)
+        return 1;
+    }
+  i = WEXITSTATUS (i) + WSTOPSIG (i) + WTERMSIG (i);
+
+  switch (i)
+    {
+#if 0
+  /* Gnulib doesn't guarantee these, yet.  */
+    case WNOHANG:
+    case WUNTRACED:
+#endif
+      break;
+    }
+  return 0;
+}
diff --git a/src/gl/tests/test-thread_create.c b/src/gl/tests/test-thread_create.c
new file mode 100644
index 0000000..f4213d4
--- /dev/null
+++ b/src/gl/tests/test-thread_create.c
@@ -0,0 +1,78 @@
+/* Test of gl_thread_create () macro.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include "glthread/thread.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "macros.h"
+
+static gl_thread_t main_thread_before;
+static gl_thread_t main_thread_after;
+static gl_thread_t worker_thread;
+
+static int dummy;
+static volatile int work_done;
+
+static void *
+worker_thread_func (void *arg)
+{
+  work_done = 1;
+  return &dummy;
+}
+
+int
+main ()
+{
+  main_thread_before = gl_thread_self ();
+
+  if (glthread_create (&worker_thread, worker_thread_func, NULL) == 0)
+    {
+      void *ret;
+
+      /* Check that gl_thread_self () has the same value before than after the
+         first call to gl_thread_create ().  */
+      main_thread_after = gl_thread_self ();
+      ASSERT (memcmp (&main_thread_before, &main_thread_after,
+                      sizeof (gl_thread_t))
+              == 0);
+
+      gl_thread_join (worker_thread, &ret);
+
+      /* Check the return value of the thread.  */
+      ASSERT (ret == &dummy);
+
+      /* Check that worker_thread_func () has finished executing.  */
+      ASSERT (work_done);
+
+      return 0;
+    }
+  else
+    {
+#if USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS
+      fputs ("glthread_create failed\n", stderr);
+      return 1;
+#else
+      fputs ("Skipping test: multithreading not enabled\n", stderr);
+      return 77;
+#endif
+    }
+}
diff --git a/src/gl/tests/test-thread_self.c b/src/gl/tests/test-thread_self.c
new file mode 100644
index 0000000..69d876d
--- /dev/null
+++ b/src/gl/tests/test-thread_self.c
@@ -0,0 +1,39 @@
+/* Test of gl_thread_self () macro.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <config.h>
+
+#include "glthread/thread.h"
+
+gl_thread_t main_thread;
+
+int
+main ()
+{
+  /* Check that gl_thread_self () can be used with just $(LIBTHREAD), not
+     $(LIBMULTITHREAD), i.e. in libraries that are multithread-safe but don't
+     create threads themselves.  */
+  /* This is not the case on AIX with --enable-threads=isoc+posix, because in
+     this case, $(LIBTHREAD) is empty whereas $(LIBMULTITHREAD) is '-lpthread'.
+   */
+#if !defined _AIX
+  main_thread = gl_thread_self ();
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-time.c b/src/gl/tests/test-time.c
new file mode 100644
index 0000000..e5a4522
--- /dev/null
+++ b/src/gl/tests/test-time.c
@@ -0,0 +1,45 @@
+/* Test of <time.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <time.h>
+
+#include "verify.h"
+
+/* Check that the types are all defined.  */
+struct timespec t1;
+#if 0
+/* POSIX:2008 does not require pid_t in <time.h> unconditionally, and indeed
+   it's missing on Mac OS X 10.5, FreeBSD 6.4, OpenBSD 4.9, mingw.  */
+pid_t t2;
+#endif
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+/* Check that TIME_UTC is defined and a positive integer.  */
+int t3 = TIME_UTC;
+verify (TIME_UTC > 0);
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-timespec.c b/src/gl/tests/test-timespec.c
new file mode 100644
index 0000000..4af9f83
--- /dev/null
+++ b/src/gl/tests/test-timespec.c
@@ -0,0 +1,167 @@
+/* Test timespec functions.
+   Copyright 2015-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#include <config.h>
+
+#include "timespec.h"
+
+#include "intprops.h"
+#include "macros.h"
+
+#include <stdbool.h>
+#include <limits.h>
+
+static struct { int s; int ns; } const prototype[] =
+  {
+    { INT_MIN, 0 },
+    { INT_MIN, 1 },
+    { INT_MIN, TIMESPEC_HZ - 1 },
+    { INT_MIN + 1, 0 },
+    { INT_MIN + 1, 1 },
+    { INT_MIN + 1, TIMESPEC_HZ - 1 },
+    { -1, 0 },
+    { -1, 1 },
+    { -1, TIMESPEC_HZ - 1 },
+    { 0, 0 },
+    { 0, 1 },
+    { 0, TIMESPEC_HZ - 1 },
+    { 1, 0 },
+    { 1, 1 },
+    { 1, TIMESPEC_HZ - 1 },
+    { 1234567890, 0 },
+    { 1234567890, 1 },
+    { 1234567890, TIMESPEC_HZ - 1 },
+    { INT_MAX - 1, 0 },
+    { INT_MAX - 1, 1 },
+    { INT_MAX - 1, TIMESPEC_HZ - 1 },
+    { INT_MAX, 0 },
+    { INT_MAX, 1 },
+    { INT_MAX, TIMESPEC_HZ - 1 },
+    { INT_MAX, 2 * TIMESPEC_HZ }
+  };
+enum { nprototypes = sizeof prototype / sizeof *prototype };
+
+static bool
+valid (struct timespec a)
+{
+  return 0 <= a.tv_nsec && a.tv_nsec < TIMESPEC_HZ;
+}
+
+static int
+sign (int i)
+{
+  return i < 0 ? -1 : 0 < i;
+}
+
+static int
+cmp (struct timespec a, struct timespec b)
+{
+  return sign (timespec_cmp (a, b));
+}
+
+static bool
+eq (struct timespec a, struct timespec b)
+{
+  return timespec_cmp (a, b) == 0;
+}
+
+static bool
+extremal (struct timespec a)
+{
+  return ((a.tv_sec == TYPE_MINIMUM (time_t) && a.tv_nsec == 0)
+          || (a.tv_sec == TYPE_MAXIMUM (time_t)
+              && a.tv_nsec == TIMESPEC_HZ - 1));
+}
+
+int
+main (void)
+{
+  int i, j, k;
+  struct timespec test[nprototypes + 1];
+  int ntests;
+  int computed_hz = 1;
+  struct timespec prevroundtrip;
+
+  test[0] = make_timespec (TYPE_MINIMUM (time_t), -1);
+  ntests = 1;
+  for (i = 0; i < nprototypes; i++)
+    {
+      int s = prototype[i].s;
+      if (TYPE_SIGNED (time_t) || 0 <= s)
+        {
+          time_t t = (s <= INT_MIN + 1 ? s - INT_MIN + TYPE_MINIMUM (time_t)
+                      : INT_MAX - 1 <= s ? s - INT_MAX + TYPE_MAXIMUM (time_t)
+                      : s);
+          test[ntests++] = make_timespec (t, prototype[i].ns);
+        }
+    }
+
+  for (i = 0; i < LOG10_TIMESPEC_HZ; i++)
+    computed_hz *= 10;
+  ASSERT (computed_hz == TIMESPEC_HZ);
+
+  for (i = 0; i < ntests; i++)
+    {
+      struct timespec a = test[i];
+
+      struct timespec roundtrip = dtotimespec (timespectod (a));
+      if (i != 0)
+        ASSERT (cmp (prevroundtrip, roundtrip) <= 0);
+      prevroundtrip = roundtrip;
+
+      ASSERT (sign (timespec_sign (a)) == cmp (a, make_timespec (0, 0)));
+
+      if (valid (a))
+        for (j = 0; j < ntests; j++)
+          {
+            struct timespec b = test[j];
+            if (valid (b))
+              {
+                struct timespec sum = timespec_add (a, b);
+                struct timespec diff = timespec_sub (a, b);
+                struct timespec rdiff = timespec_sub (b, a);
+                ASSERT (cmp (a, b) == sign (i - j));
+                ASSERT (eq (sum, timespec_add (b, a)));
+                if (! extremal (sum))
+                  {
+                    ASSERT (eq (a, timespec_sub (sum, b)));
+                    ASSERT (eq (b, timespec_sub (sum, a)));
+
+                    for (k = 0; k < ntests; k++)
+                      {
+                        struct timespec c = test[k];
+                        if (valid (c))
+                          {
+                            struct timespec sumbc = timespec_add (b, c);
+                            if (! extremal (sumbc))
+                              ASSERT (eq (timespec_add (a, sumbc),
+                                          timespec_add (sum, c)));
+                          }
+                      }
+                  }
+                if (! extremal (diff))
+                  ASSERT (eq (a, timespec_add (diff, b)));
+                if (! extremal (rdiff))
+                  ASSERT (eq (b, timespec_add (rdiff, a)));
+
+              }
+          }
+    }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-unistd.c b/src/gl/tests/test-unistd.c
new file mode 100644
index 0000000..ca7422c
--- /dev/null
+++ b/src/gl/tests/test-unistd.c
@@ -0,0 +1,56 @@
+/* Test of <unistd.h> substitute.
+   Copyright (C) 2007, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "verify.h"
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+/* Check that the various SEEK_* macros are defined.  */
+int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
+
+/* Check that the various *_FILENO macros are defined.  */
+#if ! (defined STDIN_FILENO                                     \
+       && (STDIN_FILENO + STDOUT_FILENO + STDERR_FILENO == 3))
+missing or broken *_FILENO macros
+#endif
+
+/* Check that the types are all defined.  */
+size_t t1;
+ssize_t t2;
+#ifdef TODO /* Not implemented in gnulib yet */
+uid_t t3;
+gid_t t4;
+#endif
+off_t t5;
+pid_t t6;
+#ifdef TODO
+useconds_t t7;
+intptr_t t8;
+#endif
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-unsetenv.c b/src/gl/tests/test-unsetenv.c
new file mode 100644
index 0000000..e61fbbc
--- /dev/null
+++ b/src/gl/tests/test-unsetenv.c
@@ -0,0 +1,61 @@
+/* Tests of unsetenv.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (unsetenv, int, (char const *));
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  char entry[] = "b=2";
+
+  /* Test removal when multiple entries present.  */
+  ASSERT (putenv ((char *) "a=1") == 0);
+  ASSERT (putenv (entry) == 0);
+  entry[0] = 'a'; /* Unspecified what getenv("a") would be at this point.  */
+  ASSERT (unsetenv ("a") == 0); /* Both entries will be removed.  */
+  ASSERT (getenv ("a") == NULL);
+  ASSERT (unsetenv ("a") == 0);
+
+  /* Required to fail with EINVAL.  */
+  errno = 0;
+  ASSERT (unsetenv ("") == -1);
+  ASSERT (errno == EINVAL);
+  errno = 0;
+  ASSERT (unsetenv ("a=b") == -1);
+  ASSERT (errno == EINVAL);
+#if 0
+  /* glibc and gnulib's implementation guarantee this, but POSIX no
+     longer requires it: http://austingroupbugs.net/view.php?id=185  */
+  errno = 0;
+  ASSERT (unsetenv (NULL) == -1);
+  ASSERT (errno == EINVAL);
+#endif
+
+  return 0;
+}
diff --git a/src/gl/tests/test-usleep.c b/src/gl/tests/test-usleep.c
new file mode 100644
index 0000000..63192fb
--- /dev/null
+++ b/src/gl/tests/test-usleep.c
@@ -0,0 +1,40 @@
+/* Test of usleep() function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (usleep, int, (useconds_t));
+
+#include <time.h>
+
+#include "macros.h"
+
+int
+main (void)
+{
+  time_t start = time (NULL);
+  ASSERT (usleep (1000000) == 0);
+  ASSERT (start < time (NULL));
+
+  ASSERT (usleep (0) == 0);
+
+  return 0;
+}
diff --git a/src/gl/tests/test-vasnprintf.c b/src/gl/tests/test-vasnprintf.c
new file mode 100644
index 0000000..9d99743
--- /dev/null
+++ b/src/gl/tests/test-vasnprintf.c
@@ -0,0 +1,121 @@
+/* Test of vasnprintf() and asnprintf() functions.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include "vasnprintf.h"
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+static void
+test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
+{
+  char buf[8];
+  int size;
+
+  for (size = 0; size <= 8; size++)
+    {
+      size_t length = size;
+      char *result = my_asnprintf (NULL, &length, "%d", 12345);
+      ASSERT (result != NULL);
+      ASSERT (strcmp (result, "12345") == 0);
+      ASSERT (length == 5);
+      free (result);
+    }
+
+  for (size = 0; size <= 8; size++)
+    {
+      size_t length;
+      char *result;
+
+      memcpy (buf, "DEADBEEF", 8);
+      length = size;
+      result = my_asnprintf (buf, &length, "%d", 12345);
+      ASSERT (result != NULL);
+      ASSERT (strcmp (result, "12345") == 0);
+      ASSERT (length == 5);
+      if (size < 5 + 1)
+        ASSERT (result != buf);
+      ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);
+      if (result != buf)
+        free (result);
+    }
+
+  /* Note: This test assumes IEEE 754 representation of 'double' floats.  */
+  for (size = 0; size <= 8; size++)
+    {
+      size_t length;
+      char *result;
+
+      memcpy (buf, "DEADBEEF", 8);
+      length = size;
+      result = my_asnprintf (buf, &length, "%2.0f", 1.6314159265358979e+125);
+      ASSERT (result != NULL);
+      /* The exact result and the result on glibc systems is
+         163141592653589790215729350939528493057529598899734151772468186268423257777068536614838678161083520756952076273094236944990208
+         On Cygwin, the result is
+         163141592653589790215729350939528493057529600000000000000000000000000000000000000000000000000000000000000000000000000000000000
+         On HP-UX 11.31 / hppa and IRIX 6.5, the result is
+         163141592653589790000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+       */
+      ASSERT (strlen (result) == 126);
+      ASSERT (memcmp (result, "163141592653589790", 18) == 0);
+      ASSERT (length == 126);
+      if (size < 126 + 1)
+        ASSERT (result != buf);
+      ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);
+      if (result != buf)
+        free (result);
+    }
+}
+
+static char *
+my_asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
+{
+  va_list args;
+  char *ret;
+
+  va_start (args, format);
+  ret = vasnprintf (resultbuf, lengthp, format, args);
+  va_end (args);
+  return ret;
+}
+
+static void
+test_vasnprintf ()
+{
+  test_function (my_asnprintf);
+}
+
+static void
+test_asnprintf ()
+{
+  test_function (asnprintf);
+}
+
+int
+main (int argc, char *argv[])
+{
+  test_vasnprintf ();
+  test_asnprintf ();
+  return 0;
+}
diff --git a/src/gl/tests/test-vasprintf.c b/src/gl/tests/test-vasprintf.c
new file mode 100644
index 0000000..cbebce7
--- /dev/null
+++ b/src/gl/tests/test-vasprintf.c
@@ -0,0 +1,103 @@
+/* Test of vasprintf() and asprintf() functions.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (asprintf, int, (char **, char const *, ...));
+SIGNATURE_CHECK (vasprintf, int, (char **, char const *, va_list));
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macros.h"
+
+static int
+my_asprintf (char **result, const char *format, ...)
+{
+  va_list args;
+  int ret;
+
+  va_start (args, format);
+  ret = vasprintf (result, format, args);
+  va_end (args);
+  return ret;
+}
+
+static void
+test_vasprintf ()
+{
+  int repeat;
+
+  for (repeat = 0; repeat <= 8; repeat++)
+    {
+      char *result;
+      int retval = my_asprintf (&result, "%d", 12345);
+      ASSERT (retval == 5);
+      ASSERT (result != NULL);
+      ASSERT (strcmp (result, "12345") == 0);
+      free (result);
+    }
+
+  for (repeat = 0; repeat <= 8; repeat++)
+    {
+      char *result;
+      int retval = my_asprintf (&result, "%08lx", 12345UL);
+      ASSERT (retval == 8);
+      ASSERT (result != NULL);
+      ASSERT (strcmp (result, "00003039") == 0);
+      free (result);
+    }
+}
+
+static void
+test_asprintf ()
+{
+  int repeat;
+
+  for (repeat = 0; repeat <= 8; repeat++)
+    {
+      char *result;
+      int retval = asprintf (&result, "%d", 12345);
+      ASSERT (retval == 5);
+      ASSERT (result != NULL);
+      ASSERT (strcmp (result, "12345") == 0);
+      free (result);
+    }
+
+  for (repeat = 0; repeat <= 8; repeat++)
+    {
+      char *result;
+      int retval = asprintf (&result, "%08lx", 12345UL);
+      ASSERT (retval == 8);
+      ASSERT (result != NULL);
+      ASSERT (strcmp (result, "00003039") == 0);
+      free (result);
+    }
+}
+
+int
+main (int argc, char *argv[])
+{
+  test_vasprintf ();
+  test_asprintf ();
+  return 0;
+}
diff --git a/src/gl/tests/test-verify-try.c b/src/gl/tests/test-verify-try.c
new file mode 100644
index 0000000..e97ea2a
--- /dev/null
+++ b/src/gl/tests/test-verify-try.c
@@ -0,0 +1,21 @@
+/* Test the "verify" module.
+
+   Copyright (C) 2017-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This is a separate source file, so that the execution of test-verify.sh
+   does not interfere with the building of the 'test-verify' program.  */
+
+#include "test-verify.c"
diff --git a/src/gl/tests/test-verify.c b/src/gl/tests/test-verify.c
new file mode 100644
index 0000000..65b926a
--- /dev/null
+++ b/src/gl/tests/test-verify.c
@@ -0,0 +1,119 @@
+/* Test the "verify" module.
+
+   Copyright (C) 2005, 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible.  */
+
+#include <config.h>
+
+#include "verify.h"
+
+#ifndef EXP_FAIL
+# define EXP_FAIL 0
+#endif
+
+/* ======================= Test verify, verify_expr ======================= */
+
+int gx;
+enum { A, B, C };
+
+#if EXP_FAIL == 1
+verify (gx >= 0);                 /* should give ERROR: non-constant expression */
+#endif
+verify (C == 2);                  /* should be ok */
+#if EXP_FAIL == 2
+verify (1 + 1 == 3);              /* should give ERROR */
+#endif
+verify (1 == 1); verify (1 == 1); /* should be ok */
+
+enum
+{
+  item = verify_expr (1 == 1, 10 * 0 + 17) /* should be ok */
+};
+
+static int
+function (int n)
+{
+#if EXP_FAIL == 3
+  verify (n >= 0);                  /* should give ERROR: non-constant expression */
+#endif
+  verify (C == 2);                  /* should be ok */
+#if EXP_FAIL == 4
+  verify (1 + 1 == 3);              /* should give ERROR */
+#endif
+  verify (1 == 1); verify (1 == 1); /* should be ok */
+
+  if (n)
+    return ((void) verify_expr (1 == 1, 1), verify_expr (1 == 1, 8)); /* should be ok */
+#if EXP_FAIL == 5
+  return verify_expr (1 == 2, 5); /* should give ERROR */
+#endif
+  return 0;
+}
+
+/* ============================== Test assume ============================== */
+
+static int
+f (int a)
+{
+  return a;
+}
+
+typedef struct { unsigned int context : 4; unsigned int halt : 1; } state;
+
+void test_assume_expressions (state *s);
+int test_assume_optimization (int x);
+_Noreturn void test_assume_noreturn (void);
+
+void
+test_assume_expressions (state *s)
+{
+  /* Check that 'assume' accepts a function call, even of a non-const
+     function.  */
+  assume (f (1));
+  /* Check that 'assume' accepts a bit-field expression.  */
+  assume (s->halt);
+}
+
+int
+test_assume_optimization (int x)
+{
+  /* Check that the compiler uses 'assume' for optimization.
+     This function, when compiled with optimization, should have code
+     equivalent to
+       return x + 3;
+     Use 'objdump --disassemble test-verify.o' to verify this.  */
+  assume (x >= 4);
+  return (x > 1 ? x + 3 : 2 * x + 10);
+}
+
+_Noreturn void
+test_assume_noreturn (void)
+{
+  /* Check that the compiler's data-flow analysis recognizes 'assume (0)'.
+     This function should not elicit a warning.  */
+  assume (0);
+}
+
+/* ============================== Main ===================================== */
+int
+main (void)
+{
+  state s = { 0, 1 };
+  test_assume_expressions (&s);
+  test_assume_optimization (5);
+  return !(function (0) == 0 && function (1) == 8);
+}
diff --git a/src/gl/tests/test-verify.sh b/src/gl/tests/test-verify.sh
new file mode 100755
index 0000000..1e75d55
--- /dev/null
+++ b/src/gl/tests/test-verify.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+. "${srcdir=.}/init.sh"
+
+# We are not interested in triggering bugs in the compilers and tools
+# (such as gcc 4.3.1 on openSUSE 11.0).
+unset MALLOC_PERTURB_
+
+# Rather than figure out how to invoke the compiler with the right
+# include path ourselves, we let make do it:
+(cd "$initial_cwd_" \
+ && rm -f test-verify-try.o \
+ && $MAKE test-verify-try.o >/dev/null 2>&1) \
+  || skip_ "cannot compile error-free"
+
+# Now, prove that we encounter all expected compilation failures:
+: >out
+: >err
+for i in 1 2 3 4 5; do
+  (cd "$initial_cwd_"
+   rm -f test-verify-try.o
+   $MAKE CFLAGS=-DEXP_FAIL=$i test-verify-try.o) >>out 2>>err \
+  && { warn_ "compiler didn't detect verification failure $i"; fail=1; }
+done
+
+Exit $fail
diff --git a/src/gl/tests/test-vsnprintf.c b/src/gl/tests/test-vsnprintf.c
new file mode 100644
index 0000000..617b7e7
--- /dev/null
+++ b/src/gl/tests/test-vsnprintf.c
@@ -0,0 +1,85 @@
+/* Test of vsnprintf() function.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (vsnprintf, int, (char *, size_t, char const *, va_list));
+
+#include <stdarg.h>
+#include <string.h>
+
+#include "macros.h"
+
+static int
+my_snprintf (char *buf, int size, const char *format, ...)
+{
+  va_list args;
+  int ret;
+
+  va_start (args, format);
+  ret = vsnprintf (buf, size, format, args);
+  va_end (args);
+  return ret;
+}
+
+int
+main (int argc, char *argv[])
+{
+  char buf[8];
+  int size;
+  int retval;
+
+  retval = my_snprintf (NULL, 0, "%d", 12345);
+  ASSERT (retval == 5);
+
+  for (size = 0; size <= 8; size++)
+    {
+      memcpy (buf, "DEADBEEF", 8);
+      retval = my_snprintf (buf, size, "%d", 12345);
+      ASSERT (retval == 5);
+      if (size < 6)
+        {
+          if (size > 0)
+            {
+              ASSERT (memcmp (buf, "12345", size - 1) == 0);
+              ASSERT (buf[size - 1] == '\0' || buf[size - 1] == '0' + size);
+            }
+#if !CHECK_VSNPRINTF_POSIX
+          if (size > 0)
+#endif
+            ASSERT (memcmp (buf + size, &"DEADBEEF"[size], 8 - size) == 0);
+        }
+      else
+        {
+          ASSERT (memcmp (buf, "12345\0EF", 8) == 0);
+        }
+    }
+
+  /* Test the support of the POSIX/XSI format strings with positions.  */
+  {
+    char result[100];
+    retval = my_snprintf (result, sizeof (result), "%2$d %1$d", 33, 55);
+    ASSERT (strcmp (result, "55 33") == 0);
+    ASSERT (retval == strlen (result));
+  }
+
+  return 0;
+}
diff --git a/src/gl/tests/test-wchar.c b/src/gl/tests/test-wchar.c
new file mode 100644
index 0000000..65c685c
--- /dev/null
+++ b/src/gl/tests/test-wchar.c
@@ -0,0 +1,37 @@
+/* Test of <wchar.h> substitute.
+   Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+#include "verify.h"
+
+/* Check that the types wchar_t and wint_t are defined.  */
+wchar_t a = 'c';
+wint_t b = 'x';
+
+/* Check that NULL can be passed through varargs as a pointer type,
+   per POSIX 2008.  */
+verify (sizeof NULL == sizeof (void *));
+
+int
+main (void)
+{
+  return 0;
+}
diff --git a/src/gl/tests/test-xalloc-die.c b/src/gl/tests/test-xalloc-die.c
new file mode 100644
index 0000000..3da598b
--- /dev/null
+++ b/src/gl/tests/test-xalloc-die.c
@@ -0,0 +1,28 @@
+/* Test of xalloc_die() function.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Simon Josefsson <simon@josefsson.org>, 2009.  */
+
+#include <config.h>
+
+#include "xalloc.h"
+
+int
+main (int argc _GL_UNUSED, char **argv)
+{
+  xalloc_die ();
+  return 0;
+}
diff --git a/src/gl/tests/test-xalloc-die.sh b/src/gl/tests/test-xalloc-die.sh
new file mode 100755
index 0000000..b88d959
--- /dev/null
+++ b/src/gl/tests/test-xalloc-die.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+# Test suite for xalloc_die.
+# Copyright (C) 2009-2021 Free Software Foundation, Inc.
+# This file is part of the GNUlib Library.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ .
+
+${CHECKER} test-xalloc-die${EXEEXT} > out 2> err
+case $? in
+  1) ;;
+  *) Exit 1;;
+esac
+
+tr -d '\015' < err \
+  | sed 's,.*test-xalloc-die[.ex]*:,test-xalloc-die:,' > err2 || Exit 1
+
+compare - err2 <<\EOF || Exit 1
+test-xalloc-die: memory exhausted
+EOF
+
+test -s out && Exit 1
+
+Exit $fail
diff --git a/src/gl/tests/thread-optim.h b/src/gl/tests/thread-optim.h
new file mode 100644
index 0000000..63915f9
--- /dev/null
+++ b/src/gl/tests/thread-optim.h
@@ -0,0 +1,60 @@
+/* Optimization of multithreaded code.
+
+   Copyright (C) 2020-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
+
+#ifndef _THREAD_OPTIM_H
+#define _THREAD_OPTIM_H
+
+/* This file defines a way to optimize multithreaded code for the single-thread
+   case, based on the variable '__libc_single_threaded', defined in
+   glibc >= 2.32.  */
+
+/* Typical use: In a block or function, use
+
+     bool mt = gl_multithreaded ();
+     ...
+     if (mt)
+       if (pthread_mutex_lock (&lock)) abort ();
+     ...
+     if (mt)
+       if (pthread_mutex_unlock (&lock)) abort ();
+
+   The gl_multithreaded () invocation determines whether the program currently
+   is multithreaded.
+
+   if (mt) STATEMENT executes STATEMENT in the multithreaded case, and skips
+   it in the single-threaded case.
+
+   The code between the gl_multithreaded () invocation and any use of the
+   variable 'mt' must not create threads or invoke functions that may
+   indirectly create threads (e.g. 'dlopen' may, indirectly through C++
+   initializers of global variables in the shared library being opened,
+   create threads).
+
+   The lock here is meant to synchronize threads in the same process.  The
+   same optimization cannot be applied to locks that synchronize different
+   processes (e.g. through shared memory mappings).  */
+
+#if HAVE_SYS_SINGLE_THREADED_H /* glibc >= 2.32 */
+# include <sys/single_threaded.h>
+# define gl_multithreaded()  !__libc_single_threaded
+#else
+# define gl_multithreaded()  1
+#endif
+
+#endif /* _THREAD_OPTIM_H */
diff --git a/src/gl/tests/timespec-add.c b/src/gl/tests/timespec-add.c
new file mode 100644
index 0000000..5460a04
--- /dev/null
+++ b/src/gl/tests/timespec-add.c
@@ -0,0 +1,65 @@
+/* Add two struct timespec values.
+
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+/* Return the sum of two timespec values A and B.  On overflow, return
+   an extremal value.  This assumes 0 <= tv_nsec < TIMESPEC_HZ.  */
+
+#include <config.h>
+#include "timespec.h"
+
+#include "intprops.h"
+
+struct timespec
+timespec_add (struct timespec a, struct timespec b)
+{
+  time_t rs = a.tv_sec;
+  time_t bs = b.tv_sec;
+  int ns = a.tv_nsec + b.tv_nsec;
+  int nsd = ns - TIMESPEC_HZ;
+  int rns = ns;
+
+  if (0 <= nsd)
+    {
+      rns = nsd;
+      time_t bs1;
+      if (!INT_ADD_WRAPV (bs, 1, &bs1))
+        bs = bs1;
+      else if (rs < 0)
+        rs++;
+      else
+        goto high_overflow;
+    }
+
+  if (INT_ADD_WRAPV (rs, bs, &rs))
+    {
+      if (bs < 0)
+        {
+          rs = TYPE_MINIMUM (time_t);
+          rns = 0;
+        }
+      else
+        {
+        high_overflow:
+          rs = TYPE_MAXIMUM (time_t);
+          rns = TIMESPEC_HZ - 1;
+        }
+    }
+
+  return make_timespec (rs, rns);
+}
diff --git a/src/gl/tests/timespec-sub.c b/src/gl/tests/timespec-sub.c
new file mode 100644
index 0000000..88ef69a
--- /dev/null
+++ b/src/gl/tests/timespec-sub.c
@@ -0,0 +1,65 @@
+/* Subtract two struct timespec values.
+
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+/* Return the difference between two timespec values A and B.  On
+   overflow, return an extremal value.  This assumes 0 <= tv_nsec <
+   TIMESPEC_HZ.  */
+
+#include <config.h>
+#include "timespec.h"
+
+#include "intprops.h"
+
+struct timespec
+timespec_sub (struct timespec a, struct timespec b)
+{
+  time_t rs = a.tv_sec;
+  time_t bs = b.tv_sec;
+  int ns = a.tv_nsec - b.tv_nsec;
+  int rns = ns;
+
+  if (ns < 0)
+    {
+      rns = ns + TIMESPEC_HZ;
+      time_t bs1;
+      if (!INT_ADD_WRAPV (bs, 1, &bs1))
+        bs = bs1;
+      else if (- TYPE_SIGNED (time_t) < rs)
+        rs--;
+      else
+        goto low_overflow;
+    }
+
+  if (INT_SUBTRACT_WRAPV (rs, bs, &rs))
+    {
+      if (0 < bs)
+        {
+        low_overflow:
+          rs = TYPE_MINIMUM (time_t);
+          rns = 0;
+        }
+      else
+        {
+          rs = TYPE_MAXIMUM (time_t);
+          rns = TIMESPEC_HZ - 1;
+        }
+    }
+
+  return make_timespec (rs, rns);
+}
diff --git a/src/gl/tests/uinttostr.c b/src/gl/tests/uinttostr.c
new file mode 100644
index 0000000..48fd98f
--- /dev/null
+++ b/src/gl/tests/uinttostr.c
@@ -0,0 +1,3 @@
+#define anytostr uinttostr
+#define inttype unsigned int
+#include "anytostr.c"
diff --git a/src/gl/tests/umaxtostr.c b/src/gl/tests/umaxtostr.c
new file mode 100644
index 0000000..f95bfc3
--- /dev/null
+++ b/src/gl/tests/umaxtostr.c
@@ -0,0 +1,3 @@
+#define anytostr umaxtostr
+#define inttype uintmax_t
+#include "anytostr.c"
diff --git a/src/gl/tests/usleep.c b/src/gl/tests/usleep.c
new file mode 100644
index 0000000..12c634a
--- /dev/null
+++ b/src/gl/tests/usleep.c
@@ -0,0 +1,76 @@
+/* Pausing execution of the current thread.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+   Written by Eric Blake <ebb9@byu.net>, 2009.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This file is _intentionally_ light-weight.  Rather than using
+   select or nanosleep, both of which drag in external libraries on
+   some platforms, this merely rounds up to the nearest second if
+   usleep() does not exist.  If sub-second resolution is important,
+   then use a more powerful interface to begin with.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <unistd.h>
+
+#include <errno.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+# define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+# include <windows.h>
+#endif
+
+#ifndef HAVE_USLEEP
+# define HAVE_USLEEP 0
+#endif
+
+/* Sleep for MICRO microseconds, which can be greater than 1 second.
+   Return -1 and set errno to EINVAL on range error (about 4295
+   seconds), or 0 on success.  Interaction with SIGALARM is
+   unspecified.  */
+
+int
+usleep (useconds_t micro)
+#undef usleep
+{
+#if defined _WIN32 && ! defined __CYGWIN__
+  unsigned int milliseconds = micro / 1000;
+  if (sizeof milliseconds < sizeof micro && micro / 1000 != milliseconds)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  if (micro % 1000)
+    milliseconds++;
+  Sleep (milliseconds);
+  return 0;
+#else
+  unsigned int seconds = micro / 1000000;
+  if (sizeof seconds < sizeof micro && micro / 1000000 != seconds)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  if (!HAVE_USLEEP && micro % 1000000)
+    seconds++;
+  while ((seconds = sleep (seconds)) != 0);
+
+# if !HAVE_USLEEP
+#  define usleep(x) 0
+# endif
+  return usleep (micro % 1000000);
+#endif
+}
diff --git a/src/gl/tests/vma-iter.c b/src/gl/tests/vma-iter.c
new file mode 100644
index 0000000..809828b
--- /dev/null
+++ b/src/gl/tests/vma-iter.c
@@ -0,0 +1,1635 @@
+/* Iteration over virtual memory areas.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011-2017.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* On Solaris in 32-bit mode, when gnulib module 'largefile' is in use,
+   prevent a compilation error
+     "Cannot use procfs in the large file compilation environment"
+   On Android, when targeting Android 4.4 or older with a GCC toolchain,
+   prevent a compilation error
+     "error: call to 'mmap' declared with attribute error: mmap is not
+      available with _FILE_OFFSET_BITS=64 when using GCC until android-21.
+      Either raise your minSdkVersion, disable _FILE_OFFSET_BITS=64, or
+      switch to Clang."
+   The files that we access in this compilation unit are less than 2 GB
+   large.  */
+#if defined __sun || defined __ANDROID__
+# undef _FILE_OFFSET_BITS
+#endif
+
+/* Specification.  */
+#include "vma-iter.h"
+
+#include <errno.h> /* errno */
+#include <stdlib.h> /* size_t */
+#include <fcntl.h> /* open, O_RDONLY */
+#include <unistd.h> /* getpagesize, lseek, read, close, getpid */
+
+#if defined __linux__ || defined __ANDROID__
+# include <limits.h> /* PATH_MAX */
+#endif
+
+#if defined __linux__ || defined __ANDROID__ || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ || defined __NetBSD__ || defined __minix /* || defined __CYGWIN__ */
+# include <sys/types.h>
+# include <sys/mman.h> /* mmap, munmap */
+#endif
+#if defined __minix
+# include <string.h> /* memcpy */
+#endif
+
+#if defined __FreeBSD__ || defined __FreeBSD_kernel__ /* FreeBSD, GNU/kFreeBSD */
+# include <sys/types.h>
+# include <sys/mman.h> /* mmap, munmap */
+# include <sys/user.h> /* struct kinfo_vmentry */
+# include <sys/sysctl.h> /* sysctl */
+#endif
+#if defined __NetBSD__ || defined __OpenBSD__ /* NetBSD, OpenBSD */
+# include <sys/types.h>
+# include <sys/mman.h> /* mmap, munmap */
+# include <sys/sysctl.h> /* sysctl, struct kinfo_vmentry */
+#endif
+
+#if defined __sgi || defined __osf__ /* IRIX, OSF/1 */
+# include <string.h> /* memcpy */
+# include <sys/types.h>
+# include <sys/mman.h> /* mmap, munmap */
+# include <sys/procfs.h> /* PIOC*, prmap_t */
+#endif
+
+#if defined __sun /* Solaris */
+# include <string.h> /* memcpy */
+# include <sys/types.h>
+# include <sys/mman.h> /* mmap, munmap */
+/* Try to use the newer ("structured") /proc filesystem API, if supported.  */
+# define _STRUCTURED_PROC 1
+# include <sys/procfs.h> /* prmap_t, optionally PIOC* */
+#endif
+
+#if HAVE_PSTAT_GETPROCVM /* HP-UX */
+# include <sys/pstat.h> /* pstat_getprocvm */
+#endif
+
+#if defined __APPLE__ && defined __MACH__ /* Mac OS X */
+# include <mach/mach.h>
+#endif
+
+#if defined __GNU__ /* GNU/Hurd */
+# include <mach/mach.h>
+#endif
+
+#if defined _WIN32 || defined __CYGWIN__ /* Windows */
+# include <windows.h>
+#endif
+
+#if defined __BEOS__ || defined __HAIKU__ /* BeOS, Haiku */
+# include <OS.h>
+#endif
+
+#if HAVE_MQUERY /* OpenBSD */
+# include <sys/types.h>
+# include <sys/mman.h> /* mquery */
+#endif
+
+/* Note: On AIX, there is a /proc/$pic/map file, that contains records of type
+   prmap_t, defined in <sys/procfs.h>.  But it lists only the virtual memory
+   areas that are connected to a file, not the anonymous ones.  */
+
+
+/* Support for reading text files in the /proc file system.  */
+
+#if defined __linux__ || defined __ANDROID__ || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ || defined __NetBSD__ || defined __minix /* || defined __CYGWIN__ */
+
+/* Buffered read-only streams.
+   We cannot use <stdio.h> here, because fopen() calls malloc(), and a malloc()
+   call may call mmap() and thus pre-allocate available memory.
+   Also, we cannot use multiple read() calls, because if the buffer size is
+   smaller than the file's contents:
+     - On NetBSD, the second read() call would return 0, thus making the file
+       appear truncated.
+     - On DragonFly BSD, the first read() call would fail with errno = EFBIG.
+     - On all platforms, if some other thread is doing memory allocations or
+       deallocations between two read() calls, there is a high risk that the
+       result of these two read() calls don't fit together, and as a
+       consequence we will parse garbage and either omit some VMAs or return
+       VMAs with nonsensical addresses.
+   So use mmap(), and ignore the resulting VMA.  */
+
+# if defined __linux__ || defined __ANDROID__
+  /* On Linux, if the file does not entirely fit into the buffer, the read()
+     function stops before the line that would come out truncated.  The
+     maximum size of such a line is 73 + PATH_MAX bytes.  To be sure that we
+     have read everything, we must verify that at least that many bytes are
+     left when read() returned.  */
+#  define MIN_LEFTOVER (73 + PATH_MAX)
+# else
+#  define MIN_LEFTOVER 1
+# endif
+
+# ifdef TEST
+/* During testing, we want to run into the hairy cases.  */
+#  define STACK_ALLOCATED_BUFFER_SIZE 32
+# else
+#  if MIN_LEFTOVER < 1024
+#   define STACK_ALLOCATED_BUFFER_SIZE 1024
+#  else
+    /* There is no point in using a stack-allocated buffer if it is too small anyway.  */
+#   define STACK_ALLOCATED_BUFFER_SIZE 1
+#  endif
+# endif
+
+struct rofile
+  {
+    size_t position;
+    size_t filled;
+    int eof_seen;
+    /* These fields deal with allocation of the buffer.  */
+    char *buffer;
+    char *auxmap;
+    size_t auxmap_length;
+    unsigned long auxmap_start;
+    unsigned long auxmap_end;
+    char stack_allocated_buffer[STACK_ALLOCATED_BUFFER_SIZE];
+  };
+
+/* Open a read-only file stream.  */
+static int
+rof_open (struct rofile *rof, const char *filename)
+{
+  int fd;
+  unsigned long pagesize;
+  size_t size;
+
+  fd = open (filename, O_RDONLY | O_CLOEXEC);
+  if (fd < 0)
+    return -1;
+  rof->position = 0;
+  rof->eof_seen = 0;
+  /* Try the static buffer first.  */
+  pagesize = 0;
+  rof->buffer = rof->stack_allocated_buffer;
+  size = sizeof (rof->stack_allocated_buffer);
+  rof->auxmap = NULL;
+  rof->auxmap_start = 0;
+  rof->auxmap_end = 0;
+  for (;;)
+    {
+      /* Attempt to read the contents in a single system call.  */
+      if (size > MIN_LEFTOVER)
+        {
+          int n = read (fd, rof->buffer, size);
+          if (n < 0 && errno == EINTR)
+            goto retry;
+# if defined __DragonFly__
+          if (!(n < 0 && errno == EFBIG))
+# endif
+            {
+              if (n <= 0)
+                /* Empty file.  */
+                goto fail1;
+              if (n + MIN_LEFTOVER <= size)
+                {
+                  /* The buffer was sufficiently large.  */
+                  rof->filled = n;
+# if defined __linux__ || defined __ANDROID__
+                  /* On Linux, the read() call may stop even if the buffer was
+                     large enough.  We need the equivalent of full_read().  */
+                  for (;;)
+                    {
+                      n = read (fd, rof->buffer + rof->filled, size - rof->filled);
+                      if (n < 0 && errno == EINTR)
+                        goto retry;
+                      if (n < 0)
+                        /* Some error.  */
+                        goto fail1;
+                      if (n + MIN_LEFTOVER > size - rof->filled)
+                        /* Allocate a larger buffer.  */
+                        break;
+                      if (n == 0)
+                        {
+                          /* Reached the end of file.  */
+                          close (fd);
+                          return 0;
+                        }
+                      rof->filled += n;
+                    }
+# else
+                  close (fd);
+                  return 0;
+# endif
+                }
+            }
+        }
+      /* Allocate a larger buffer.  */
+      if (pagesize == 0)
+        {
+          pagesize = getpagesize ();
+          size = pagesize;
+          while (size <= MIN_LEFTOVER)
+            size = 2 * size;
+        }
+      else
+        {
+          size = 2 * size;
+          if (size == 0)
+            /* Wraparound.  */
+            goto fail1;
+          if (rof->auxmap != NULL)
+            munmap (rof->auxmap, rof->auxmap_length);
+        }
+      rof->auxmap = (void *) mmap ((void *) 0, size, PROT_READ | PROT_WRITE,
+                                   MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+      if (rof->auxmap == (void *) -1)
+        {
+          close (fd);
+          return -1;
+        }
+      rof->auxmap_length = size;
+      rof->auxmap_start = (unsigned long) rof->auxmap;
+      rof->auxmap_end = rof->auxmap_start + size;
+      rof->buffer = (char *) rof->auxmap;
+     retry:
+      /* Restart.  */
+      if (lseek (fd, 0, SEEK_SET) < 0)
+        {
+          close (fd);
+          fd = open (filename, O_RDONLY | O_CLOEXEC);
+          if (fd < 0)
+            goto fail2;
+        }
+    }
+ fail1:
+  close (fd);
+ fail2:
+  if (rof->auxmap != NULL)
+    munmap (rof->auxmap, rof->auxmap_length);
+  return -1;
+}
+
+/* Return the next byte from a read-only file stream without consuming it,
+   or -1 at EOF.  */
+static int
+rof_peekchar (struct rofile *rof)
+{
+  if (rof->position == rof->filled)
+    {
+      rof->eof_seen = 1;
+      return -1;
+    }
+  return (unsigned char) rof->buffer[rof->position];
+}
+
+/* Return the next byte from a read-only file stream, or -1 at EOF.  */
+static int
+rof_getchar (struct rofile *rof)
+{
+  int c = rof_peekchar (rof);
+  if (c >= 0)
+    rof->position++;
+  return c;
+}
+
+/* Parse an unsigned hexadecimal number from a read-only file stream.  */
+static int
+rof_scanf_lx (struct rofile *rof, unsigned long *valuep)
+{
+  unsigned long value = 0;
+  unsigned int numdigits = 0;
+  for (;;)
+    {
+      int c = rof_peekchar (rof);
+      if (c >= '0' && c <= '9')
+        value = (value << 4) + (c - '0');
+      else if (c >= 'A' && c <= 'F')
+        value = (value << 4) + (c - 'A' + 10);
+      else if (c >= 'a' && c <= 'f')
+        value = (value << 4) + (c - 'a' + 10);
+      else
+        break;
+      rof_getchar (rof);
+      numdigits++;
+    }
+  if (numdigits == 0)
+    return -1;
+  *valuep = value;
+  return 0;
+}
+
+/* Close a read-only file stream.  */
+static void
+rof_close (struct rofile *rof)
+{
+  if (rof->auxmap != NULL)
+    munmap (rof->auxmap, rof->auxmap_length);
+}
+
+#endif
+
+
+/* Support for reading the info from a text file in the /proc file system.  */
+
+#if defined __linux__ || defined __ANDROID__ || (defined __FreeBSD_kernel__ && !defined __FreeBSD__) /* || defined __CYGWIN__ */
+/* GNU/kFreeBSD mounts /proc as linprocfs, which looks like a Linux /proc
+   file system.  */
+
+static int
+vma_iterate_proc (vma_iterate_callback_fn callback, void *data)
+{
+  struct rofile rof;
+
+  /* Open the current process' maps file.  It describes one VMA per line.  */
+  if (rof_open (&rof, "/proc/self/maps") >= 0)
+    {
+      unsigned long auxmap_start = rof.auxmap_start;
+      unsigned long auxmap_end = rof.auxmap_end;
+
+      for (;;)
+        {
+          unsigned long start, end;
+          unsigned int flags;
+          int c;
+
+          /* Parse one line.  First start and end.  */
+          if (!(rof_scanf_lx (&rof, &start) >= 0
+                && rof_getchar (&rof) == '-'
+                && rof_scanf_lx (&rof, &end) >= 0))
+            break;
+          /* Then the flags.  */
+          do
+            c = rof_getchar (&rof);
+          while (c == ' ');
+          flags = 0;
+          if (c == 'r')
+            flags |= VMA_PROT_READ;
+          c = rof_getchar (&rof);
+          if (c == 'w')
+            flags |= VMA_PROT_WRITE;
+          c = rof_getchar (&rof);
+          if (c == 'x')
+            flags |= VMA_PROT_EXECUTE;
+          while (c = rof_getchar (&rof), c != -1 && c != '\n')
+            ;
+
+          if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+            {
+              /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+                 = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+              if (start < auxmap_start)
+                if (callback (data, start, auxmap_start, flags))
+                  break;
+              if (auxmap_end - 1 < end - 1)
+                if (callback (data, auxmap_end, end, flags))
+                  break;
+            }
+          else
+            {
+              if (callback (data, start, end, flags))
+                break;
+            }
+        }
+      rof_close (&rof);
+      return 0;
+    }
+
+  return -1;
+}
+
+#elif defined __FreeBSD__ || defined __DragonFly__ || defined __NetBSD__
+
+static int
+vma_iterate_proc (vma_iterate_callback_fn callback, void *data)
+{
+  struct rofile rof;
+
+  /* Open the current process' maps file.  It describes one VMA per line.  */
+  if (rof_open (&rof, "/proc/curproc/map") >= 0)
+    {
+      unsigned long auxmap_start = rof.auxmap_start;
+      unsigned long auxmap_end = rof.auxmap_end;
+
+      for (;;)
+        {
+          unsigned long start, end;
+          unsigned int flags;
+          int c;
+
+          /* Parse one line.  First start.  */
+          if (!(rof_getchar (&rof) == '0'
+                && rof_getchar (&rof) == 'x'
+                && rof_scanf_lx (&rof, &start) >= 0))
+            break;
+          while (c = rof_peekchar (&rof), c == ' ' || c == '\t')
+            rof_getchar (&rof);
+          /* Then end.  */
+          if (!(rof_getchar (&rof) == '0'
+                && rof_getchar (&rof) == 'x'
+                && rof_scanf_lx (&rof, &end) >= 0))
+            break;
+# if defined __FreeBSD__ || defined __DragonFly__
+          /* Then the resident pages count.  */
+          do
+            c = rof_getchar (&rof);
+          while (c == ' ');
+          do
+            c = rof_getchar (&rof);
+          while (c != -1 && c != '\n' && c != ' ');
+          /* Then the private resident pages count.  */
+          do
+            c = rof_getchar (&rof);
+          while (c == ' ');
+          do
+            c = rof_getchar (&rof);
+          while (c != -1 && c != '\n' && c != ' ');
+          /* Then some kernel address.  */
+          do
+            c = rof_getchar (&rof);
+          while (c == ' ');
+          do
+            c = rof_getchar (&rof);
+          while (c != -1 && c != '\n' && c != ' ');
+# endif
+          /* Then the flags.  */
+          do
+            c = rof_getchar (&rof);
+          while (c == ' ');
+          flags = 0;
+          if (c == 'r')
+            flags |= VMA_PROT_READ;
+          c = rof_getchar (&rof);
+          if (c == 'w')
+            flags |= VMA_PROT_WRITE;
+          c = rof_getchar (&rof);
+          if (c == 'x')
+            flags |= VMA_PROT_EXECUTE;
+          while (c = rof_getchar (&rof), c != -1 && c != '\n')
+            ;
+
+          if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+            {
+              /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+                 = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+              if (start < auxmap_start)
+                if (callback (data, start, auxmap_start, flags))
+                  break;
+              if (auxmap_end - 1 < end - 1)
+                if (callback (data, auxmap_end, end, flags))
+                  break;
+            }
+          else
+            {
+              if (callback (data, start, end, flags))
+                break;
+            }
+        }
+      rof_close (&rof);
+      return 0;
+    }
+
+  return -1;
+}
+
+#elif defined __minix
+
+static int
+vma_iterate_proc (vma_iterate_callback_fn callback, void *data)
+{
+  char fnamebuf[6+10+4+1];
+  char *fname;
+  struct rofile rof;
+
+  /* Construct fname = sprintf (fnamebuf+i, "/proc/%u/map", getpid ()).  */
+  fname = fnamebuf + sizeof (fnamebuf) - (4 + 1);
+  memcpy (fname, "/map", 4 + 1);
+  {
+    unsigned int value = getpid ();
+    do
+      *--fname = (value % 10) + '0';
+    while ((value = value / 10) > 0);
+  }
+  fname -= 6;
+  memcpy (fname, "/proc/", 6);
+
+  /* Open the current process' maps file.  It describes one VMA per line.  */
+  if (rof_open (&rof, fname) >= 0)
+    {
+      unsigned long auxmap_start = rof.auxmap_start;
+      unsigned long auxmap_end = rof.auxmap_end;
+
+      for (;;)
+        {
+          unsigned long start, end;
+          unsigned int flags;
+          int c;
+
+          /* Parse one line.  First start and end.  */
+          if (!(rof_scanf_lx (&rof, &start) >= 0
+                && rof_getchar (&rof) == '-'
+                && rof_scanf_lx (&rof, &end) >= 0))
+            break;
+          /* Then the flags.  */
+          do
+            c = rof_getchar (&rof);
+          while (c == ' ');
+          flags = 0;
+          if (c == 'r')
+            flags |= VMA_PROT_READ;
+          c = rof_getchar (&rof);
+          if (c == 'w')
+            flags |= VMA_PROT_WRITE;
+          c = rof_getchar (&rof);
+          if (c == 'x')
+            flags |= VMA_PROT_EXECUTE;
+          while (c = rof_getchar (&rof), c != -1 && c != '\n')
+            ;
+
+          if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+            {
+              /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+                 = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+              if (start < auxmap_start)
+                if (callback (data, start, auxmap_start, flags))
+                  break;
+              if (auxmap_end - 1 < end - 1)
+                if (callback (data, auxmap_end, end, flags))
+                  break;
+            }
+          else
+            {
+              if (callback (data, start, end, flags))
+                break;
+            }
+        }
+      rof_close (&rof);
+      return 0;
+    }
+
+  return -1;
+}
+
+#else
+
+static inline int
+vma_iterate_proc (vma_iterate_callback_fn callback, void *data)
+{
+  return -1;
+}
+
+#endif
+
+
+/* Support for reading the info from the BSD sysctl() system call.  */
+
+#if (defined __FreeBSD__ || defined __FreeBSD_kernel__) && defined KERN_PROC_VMMAP /* FreeBSD >= 7.1 */
+
+static int
+vma_iterate_bsd (vma_iterate_callback_fn callback, void *data)
+{
+  /* Documentation: https://www.freebsd.org/cgi/man.cgi?sysctl(3)  */
+  int info_path[] = { CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid () };
+  size_t len;
+  size_t pagesize;
+  size_t memneed;
+  void *auxmap;
+  unsigned long auxmap_start;
+  unsigned long auxmap_end;
+  char *mem;
+  char *p;
+  char *p_end;
+
+  len = 0;
+  if (sysctl (info_path, 4, NULL, &len, NULL, 0) < 0)
+    return -1;
+  /* Allow for small variations over time.  In a multithreaded program
+     new VMAs can be allocated at any moment.  */
+  len = 2 * len + 200;
+  /* Allocate memneed bytes of memory.
+     We cannot use alloca here, because not much stack space is guaranteed.
+     We also cannot use malloc here, because a malloc() call may call mmap()
+     and thus pre-allocate available memory.
+     So use mmap(), and ignore the resulting VMA.  */
+  pagesize = getpagesize ();
+  memneed = len;
+  memneed = ((memneed - 1) / pagesize + 1) * pagesize;
+  auxmap = (void *) mmap ((void *) 0, memneed, PROT_READ | PROT_WRITE,
+                          MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+  if (auxmap == (void *) -1)
+    return -1;
+  auxmap_start = (unsigned long) auxmap;
+  auxmap_end = auxmap_start + memneed;
+  mem = (char *) auxmap;
+  if (sysctl (info_path, 4, mem, &len, NULL, 0) < 0)
+    {
+      munmap (auxmap, memneed);
+      return -1;
+    }
+  p = mem;
+  p_end = mem + len;
+  while (p < p_end)
+    {
+      struct kinfo_vmentry *kve = (struct kinfo_vmentry *) p;
+      unsigned long start = kve->kve_start;
+      unsigned long end = kve->kve_end;
+      unsigned int flags = 0;
+      if (kve->kve_protection & KVME_PROT_READ)
+        flags |= VMA_PROT_READ;
+      if (kve->kve_protection & KVME_PROT_WRITE)
+        flags |= VMA_PROT_WRITE;
+      if (kve->kve_protection & KVME_PROT_EXEC)
+        flags |= VMA_PROT_EXECUTE;
+      if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+        {
+          /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+             = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+          if (start < auxmap_start)
+            if (callback (data, start, auxmap_start, flags))
+              break;
+          if (auxmap_end - 1 < end - 1)
+            if (callback (data, auxmap_end, end, flags))
+              break;
+        }
+      else
+        {
+          if (callback (data, start, end, flags))
+            break;
+        }
+      p += kve->kve_structsize;
+    }
+  munmap (auxmap, memneed);
+  return 0;
+}
+
+#elif defined __NetBSD__ && defined VM_PROC_MAP /* NetBSD >= 8.0 */
+
+static int
+vma_iterate_bsd (vma_iterate_callback_fn callback, void *data)
+{
+  /* Documentation: https://man.netbsd.org/man/sysctl+7  */
+  unsigned int entry_size =
+    /* If we wanted to have the path of each entry, we would need
+       sizeof (struct kinfo_vmentry).  But we need only the non-string
+       parts of each entry.  */
+    offsetof (struct kinfo_vmentry, kve_path);
+  int info_path[] = { CTL_VM, VM_PROC, VM_PROC_MAP, getpid (), entry_size };
+  size_t len;
+  size_t pagesize;
+  size_t memneed;
+  void *auxmap;
+  unsigned long auxmap_start;
+  unsigned long auxmap_end;
+  char *mem;
+  char *p;
+  char *p_end;
+
+  len = 0;
+  if (sysctl (info_path, 5, NULL, &len, NULL, 0) < 0)
+    return -1;
+  /* Allow for small variations over time.  In a multithreaded program
+     new VMAs can be allocated at any moment.  */
+  len = 2 * len + 10 * entry_size;
+  /* But the system call rejects lengths > 1 MB.  */
+  if (len > 0x100000)
+    len = 0x100000;
+  /* And the system call causes a kernel panic if the length is not a multiple
+     of entry_size.  */
+  len = (len / entry_size) * entry_size;
+  /* Allocate memneed bytes of memory.
+     We cannot use alloca here, because not much stack space is guaranteed.
+     We also cannot use malloc here, because a malloc() call may call mmap()
+     and thus pre-allocate available memory.
+     So use mmap(), and ignore the resulting VMA.  */
+  pagesize = getpagesize ();
+  memneed = len;
+  memneed = ((memneed - 1) / pagesize + 1) * pagesize;
+  auxmap = (void *) mmap ((void *) 0, memneed, PROT_READ | PROT_WRITE,
+                          MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+  if (auxmap == (void *) -1)
+    return -1;
+  auxmap_start = (unsigned long) auxmap;
+  auxmap_end = auxmap_start + memneed;
+  mem = (char *) auxmap;
+  if (sysctl (info_path, 5, mem, &len, NULL, 0) < 0
+      || len > 0x100000 - entry_size)
+    {
+      /* sysctl failed, or the list of VMAs is possibly truncated.  */
+      munmap (auxmap, memneed);
+      return -1;
+    }
+  p = mem;
+  p_end = mem + len;
+  while (p < p_end)
+    {
+      struct kinfo_vmentry *kve = (struct kinfo_vmentry *) p;
+      unsigned long start = kve->kve_start;
+      unsigned long end = kve->kve_end;
+      unsigned int flags = 0;
+      if (kve->kve_protection & KVME_PROT_READ)
+        flags |= VMA_PROT_READ;
+      if (kve->kve_protection & KVME_PROT_WRITE)
+        flags |= VMA_PROT_WRITE;
+      if (kve->kve_protection & KVME_PROT_EXEC)
+        flags |= VMA_PROT_EXECUTE;
+      if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+        {
+          /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+             = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+          if (start < auxmap_start)
+            if (callback (data, start, auxmap_start, flags))
+              break;
+          if (auxmap_end - 1 < end - 1)
+            if (callback (data, auxmap_end, end, flags))
+              break;
+        }
+      else
+        {
+          if (callback (data, start, end, flags))
+            break;
+        }
+      p += entry_size;
+    }
+  munmap (auxmap, memneed);
+  return 0;
+}
+
+#elif defined __OpenBSD__ && defined KERN_PROC_VMMAP /* OpenBSD >= 5.7 */
+
+static int
+vma_iterate_bsd (vma_iterate_callback_fn callback, void *data)
+{
+  /* Documentation: https://man.openbsd.org/sysctl.2  */
+  int info_path[] = { CTL_KERN, KERN_PROC_VMMAP, getpid () };
+  size_t len;
+  size_t pagesize;
+  size_t memneed;
+  void *auxmap;
+  unsigned long auxmap_start;
+  unsigned long auxmap_end;
+  char *mem;
+  char *p;
+  char *p_end;
+
+  len = 0;
+  if (sysctl (info_path, 3, NULL, &len, NULL, 0) < 0)
+    return -1;
+  /* Allow for small variations over time.  In a multithreaded program
+     new VMAs can be allocated at any moment.  */
+  len = 2 * len + 10 * sizeof (struct kinfo_vmentry);
+  /* But the system call rejects lengths > 64 KB.  */
+  if (len > 0x10000)
+    len = 0x10000;
+  /* And the system call rejects lengths that are not a multiple of
+     sizeof (struct kinfo_vmentry).  */
+  len = (len / sizeof (struct kinfo_vmentry)) * sizeof (struct kinfo_vmentry);
+  /* Allocate memneed bytes of memory.
+     We cannot use alloca here, because not much stack space is guaranteed.
+     We also cannot use malloc here, because a malloc() call may call mmap()
+     and thus pre-allocate available memory.
+     So use mmap(), and ignore the resulting VMA.  */
+  pagesize = getpagesize ();
+  memneed = len;
+  memneed = ((memneed - 1) / pagesize + 1) * pagesize;
+  auxmap = (void *) mmap ((void *) 0, memneed, PROT_READ | PROT_WRITE,
+                          MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+  if (auxmap == (void *) -1)
+    return -1;
+  auxmap_start = (unsigned long) auxmap;
+  auxmap_end = auxmap_start + memneed;
+  mem = (char *) auxmap;
+  if (sysctl (info_path, 3, mem, &len, NULL, 0) < 0
+      || len > 0x10000 - sizeof (struct kinfo_vmentry))
+    {
+      /* sysctl failed, or the list of VMAs is possibly truncated.  */
+      munmap (auxmap, memneed);
+      return -1;
+    }
+  p = mem;
+  p_end = mem + len;
+  while (p < p_end)
+    {
+      struct kinfo_vmentry *kve = (struct kinfo_vmentry *) p;
+      unsigned long start = kve->kve_start;
+      unsigned long end = kve->kve_end;
+      unsigned int flags = 0;
+      if (kve->kve_protection & KVE_PROT_READ)
+        flags |= VMA_PROT_READ;
+      if (kve->kve_protection & KVE_PROT_WRITE)
+        flags |= VMA_PROT_WRITE;
+      if (kve->kve_protection & KVE_PROT_EXEC)
+        flags |= VMA_PROT_EXECUTE;
+      if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+        {
+          /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+             = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+          if (start < auxmap_start)
+            if (callback (data, start, auxmap_start, flags))
+              break;
+          if (auxmap_end - 1 < end - 1)
+            if (callback (data, auxmap_end, end, flags))
+              break;
+        }
+      else
+        {
+          if (start != end)
+            if (callback (data, start, end, flags))
+              break;
+        }
+      p += sizeof (struct kinfo_vmentry);
+    }
+  munmap (auxmap, memneed);
+  return 0;
+}
+
+#else
+
+static inline int
+vma_iterate_bsd (vma_iterate_callback_fn callback, void *data)
+{
+  return -1;
+}
+
+#endif
+
+
+int
+vma_iterate (vma_iterate_callback_fn callback, void *data)
+{
+#if defined __linux__ || defined __ANDROID__ || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ || defined __NetBSD__ || defined __minix /* || defined __CYGWIN__ */
+
+# if defined __FreeBSD__
+  /* On FreeBSD with procfs (but not GNU/kFreeBSD, which uses linprocfs), the
+     function vma_iterate_proc does not return the virtual memory areas that
+     were created by anonymous mmap.  See
+     <https://svnweb.freebsd.org/base/head/sys/fs/procfs/procfs_map.c?view=markup>
+     So use vma_iterate_proc only as a fallback.  */
+  int retval = vma_iterate_bsd (callback, data);
+  if (retval == 0)
+      return 0;
+
+  return vma_iterate_proc (callback, data);
+# else
+  /* On the other platforms, try the /proc approach first, and the sysctl()
+     as a fallback.  */
+  int retval = vma_iterate_proc (callback, data);
+  if (retval == 0)
+      return 0;
+
+  return vma_iterate_bsd (callback, data);
+# endif
+
+#elif defined __sgi || defined __osf__ /* IRIX, OSF/1 */
+
+  size_t pagesize;
+  char fnamebuf[6+10+1];
+  char *fname;
+  int fd;
+  int nmaps;
+  size_t memneed;
+# if HAVE_MAP_ANONYMOUS
+#  define zero_fd -1
+#  define map_flags MAP_ANONYMOUS
+# else
+  int zero_fd;
+#  define map_flags 0
+# endif
+  void *auxmap;
+  unsigned long auxmap_start;
+  unsigned long auxmap_end;
+  prmap_t* maps;
+  prmap_t* mp;
+
+  pagesize = getpagesize ();
+
+  /* Construct fname = sprintf (fnamebuf+i, "/proc/%u", getpid ()).  */
+  fname = fnamebuf + sizeof (fnamebuf) - 1;
+  *fname = '\0';
+  {
+    unsigned int value = getpid ();
+    do
+      *--fname = (value % 10) + '0';
+    while ((value = value / 10) > 0);
+  }
+  fname -= 6;
+  memcpy (fname, "/proc/", 6);
+
+  fd = open (fname, O_RDONLY | O_CLOEXEC);
+  if (fd < 0)
+    return -1;
+
+  if (ioctl (fd, PIOCNMAP, &nmaps) < 0)
+    goto fail2;
+
+  memneed = (nmaps + 10) * sizeof (prmap_t);
+  /* Allocate memneed bytes of memory.
+     We cannot use alloca here, because not much stack space is guaranteed.
+     We also cannot use malloc here, because a malloc() call may call mmap()
+     and thus pre-allocate available memory.
+     So use mmap(), and ignore the resulting VMA.  */
+  memneed = ((memneed - 1) / pagesize + 1) * pagesize;
+# if !HAVE_MAP_ANONYMOUS
+  zero_fd = open ("/dev/zero", O_RDONLY | O_CLOEXEC, 0644);
+  if (zero_fd < 0)
+    goto fail2;
+# endif
+  auxmap = (void *) mmap ((void *) 0, memneed, PROT_READ | PROT_WRITE,
+                          map_flags | MAP_PRIVATE, zero_fd, 0);
+# if !HAVE_MAP_ANONYMOUS
+  close (zero_fd);
+# endif
+  if (auxmap == (void *) -1)
+    goto fail2;
+  auxmap_start = (unsigned long) auxmap;
+  auxmap_end = auxmap_start + memneed;
+  maps = (prmap_t *) auxmap;
+
+  if (ioctl (fd, PIOCMAP, maps) < 0)
+    goto fail1;
+
+  for (mp = maps;;)
+    {
+      unsigned long start, end;
+      unsigned int flags;
+
+      start = (unsigned long) mp->pr_vaddr;
+      end = start + mp->pr_size;
+      if (start == 0 && end == 0)
+        break;
+      flags = 0;
+      if (mp->pr_mflags & MA_READ)
+        flags |= VMA_PROT_READ;
+      if (mp->pr_mflags & MA_WRITE)
+        flags |= VMA_PROT_WRITE;
+      if (mp->pr_mflags & MA_EXEC)
+        flags |= VMA_PROT_EXECUTE;
+      mp++;
+      if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+        {
+          /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+             = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+          if (start < auxmap_start)
+            if (callback (data, start, auxmap_start, flags))
+              break;
+          if (auxmap_end - 1 < end - 1)
+            if (callback (data, auxmap_end, end, flags))
+              break;
+        }
+      else
+        {
+          if (callback (data, start, end, flags))
+            break;
+        }
+    }
+  munmap (auxmap, memneed);
+  close (fd);
+  return 0;
+
+ fail1:
+  munmap (auxmap, memneed);
+ fail2:
+  close (fd);
+  return -1;
+
+#elif defined __sun /* Solaris */
+
+  /* Note: Solaris <sys/procfs.h> defines a different type prmap_t with
+     _STRUCTURED_PROC than without! Here's a table of sizeof(prmap_t):
+                                  32-bit   64-bit
+         _STRUCTURED_PROC = 0       32       56
+         _STRUCTURED_PROC = 1       96      104
+     Therefore, if the include files provide the newer API, prmap_t has
+     the bigger size, and thus you MUST use the newer API.  And if the
+     include files provide the older API, prmap_t has the smaller size,
+     and thus you MUST use the older API.  */
+
+# if defined PIOCNMAP && defined PIOCMAP
+  /* We must use the older /proc interface.  */
+
+  size_t pagesize;
+  char fnamebuf[6+10+1];
+  char *fname;
+  int fd;
+  int nmaps;
+  size_t memneed;
+#  if HAVE_MAP_ANONYMOUS
+#   define zero_fd -1
+#   define map_flags MAP_ANONYMOUS
+#  else /* Solaris <= 7 */
+  int zero_fd;
+#   define map_flags 0
+#  endif
+  void *auxmap;
+  unsigned long auxmap_start;
+  unsigned long auxmap_end;
+  prmap_t* maps;
+  prmap_t* mp;
+
+  pagesize = getpagesize ();
+
+  /* Construct fname = sprintf (fnamebuf+i, "/proc/%u", getpid ()).  */
+  fname = fnamebuf + sizeof (fnamebuf) - 1;
+  *fname = '\0';
+  {
+    unsigned int value = getpid ();
+    do
+      *--fname = (value % 10) + '0';
+    while ((value = value / 10) > 0);
+  }
+  fname -= 6;
+  memcpy (fname, "/proc/", 6);
+
+  fd = open (fname, O_RDONLY | O_CLOEXEC);
+  if (fd < 0)
+    return -1;
+
+  if (ioctl (fd, PIOCNMAP, &nmaps) < 0)
+    goto fail2;
+
+  memneed = (nmaps + 10) * sizeof (prmap_t);
+  /* Allocate memneed bytes of memory.
+     We cannot use alloca here, because not much stack space is guaranteed.
+     We also cannot use malloc here, because a malloc() call may call mmap()
+     and thus pre-allocate available memory.
+     So use mmap(), and ignore the resulting VMA.  */
+  memneed = ((memneed - 1) / pagesize + 1) * pagesize;
+#  if !HAVE_MAP_ANONYMOUS
+  zero_fd = open ("/dev/zero", O_RDONLY | O_CLOEXEC, 0644);
+  if (zero_fd < 0)
+    goto fail2;
+#  endif
+  auxmap = (void *) mmap ((void *) 0, memneed, PROT_READ | PROT_WRITE,
+                          map_flags | MAP_PRIVATE, zero_fd, 0);
+#  if !HAVE_MAP_ANONYMOUS
+  close (zero_fd);
+#  endif
+  if (auxmap == (void *) -1)
+    goto fail2;
+  auxmap_start = (unsigned long) auxmap;
+  auxmap_end = auxmap_start + memneed;
+  maps = (prmap_t *) auxmap;
+
+  if (ioctl (fd, PIOCMAP, maps) < 0)
+    goto fail1;
+
+  for (mp = maps;;)
+    {
+      unsigned long start, end;
+      unsigned int flags;
+
+      start = (unsigned long) mp->pr_vaddr;
+      end = start + mp->pr_size;
+      if (start == 0 && end == 0)
+        break;
+      flags = 0;
+      if (mp->pr_mflags & MA_READ)
+        flags |= VMA_PROT_READ;
+      if (mp->pr_mflags & MA_WRITE)
+        flags |= VMA_PROT_WRITE;
+      if (mp->pr_mflags & MA_EXEC)
+        flags |= VMA_PROT_EXECUTE;
+      mp++;
+      if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+        {
+          /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+             = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+          if (start < auxmap_start)
+            if (callback (data, start, auxmap_start, flags))
+              break;
+          if (auxmap_end - 1 < end - 1)
+            if (callback (data, auxmap_end, end, flags))
+              break;
+        }
+      else
+        {
+          if (callback (data, start, end, flags))
+            break;
+        }
+    }
+  munmap (auxmap, memneed);
+  close (fd);
+  return 0;
+
+ fail1:
+  munmap (auxmap, memneed);
+ fail2:
+  close (fd);
+  return -1;
+
+# else
+  /* We must use the newer /proc interface.
+     Documentation:
+     https://docs.oracle.com/cd/E23824_01/html/821-1473/proc-4.html
+     The contents of /proc/<pid>/map consists of records of type
+     prmap_t.  These are different in 32-bit and 64-bit processes,
+     but here we are fortunately accessing only the current process.  */
+
+  size_t pagesize;
+  char fnamebuf[6+10+4+1];
+  char *fname;
+  int fd;
+  int nmaps;
+  size_t memneed;
+#  if HAVE_MAP_ANONYMOUS
+#   define zero_fd -1
+#   define map_flags MAP_ANONYMOUS
+#  else /* Solaris <= 7 */
+  int zero_fd;
+#   define map_flags 0
+#  endif
+  void *auxmap;
+  unsigned long auxmap_start;
+  unsigned long auxmap_end;
+  prmap_t* maps;
+  prmap_t* maps_end;
+  prmap_t* mp;
+
+  pagesize = getpagesize ();
+
+  /* Construct fname = sprintf (fnamebuf+i, "/proc/%u/map", getpid ()).  */
+  fname = fnamebuf + sizeof (fnamebuf) - 1 - 4;
+  memcpy (fname, "/map", 4 + 1);
+  {
+    unsigned int value = getpid ();
+    do
+      *--fname = (value % 10) + '0';
+    while ((value = value / 10) > 0);
+  }
+  fname -= 6;
+  memcpy (fname, "/proc/", 6);
+
+  fd = open (fname, O_RDONLY | O_CLOEXEC);
+  if (fd < 0)
+    return -1;
+
+  {
+    struct stat statbuf;
+    if (fstat (fd, &statbuf) < 0)
+      goto fail2;
+    nmaps = statbuf.st_size / sizeof (prmap_t);
+  }
+
+  memneed = (nmaps + 10) * sizeof (prmap_t);
+  /* Allocate memneed bytes of memory.
+     We cannot use alloca here, because not much stack space is guaranteed.
+     We also cannot use malloc here, because a malloc() call may call mmap()
+     and thus pre-allocate available memory.
+     So use mmap(), and ignore the resulting VMA.  */
+  memneed = ((memneed - 1) / pagesize + 1) * pagesize;
+#  if !HAVE_MAP_ANONYMOUS
+  zero_fd = open ("/dev/zero", O_RDONLY | O_CLOEXEC, 0644);
+  if (zero_fd < 0)
+    goto fail2;
+#  endif
+  auxmap = (void *) mmap ((void *) 0, memneed, PROT_READ | PROT_WRITE,
+                          map_flags | MAP_PRIVATE, zero_fd, 0);
+#  if !HAVE_MAP_ANONYMOUS
+  close (zero_fd);
+#  endif
+  if (auxmap == (void *) -1)
+    goto fail2;
+  auxmap_start = (unsigned long) auxmap;
+  auxmap_end = auxmap_start + memneed;
+  maps = (prmap_t *) auxmap;
+
+  /* Read up to memneed bytes from fd into maps.  */
+  {
+    size_t remaining = memneed;
+    size_t total_read = 0;
+    char *ptr = (char *) maps;
+
+    do
+      {
+        size_t nread = read (fd, ptr, remaining);
+        if (nread == (size_t)-1)
+          {
+            if (errno == EINTR)
+              continue;
+            goto fail1;
+          }
+        if (nread == 0)
+          /* EOF */
+          break;
+        total_read += nread;
+        ptr += nread;
+        remaining -= nread;
+      }
+    while (remaining > 0);
+
+    nmaps = (memneed - remaining) / sizeof (prmap_t);
+    maps_end = maps + nmaps;
+  }
+
+  for (mp = maps; mp < maps_end; mp++)
+    {
+      unsigned long start, end;
+      unsigned int flags;
+
+      start = (unsigned long) mp->pr_vaddr;
+      end = start + mp->pr_size;
+      flags = 0;
+      if (mp->pr_mflags & MA_READ)
+        flags |= VMA_PROT_READ;
+      if (mp->pr_mflags & MA_WRITE)
+        flags |= VMA_PROT_WRITE;
+      if (mp->pr_mflags & MA_EXEC)
+        flags |= VMA_PROT_EXECUTE;
+      if (start <= auxmap_start && auxmap_end - 1 <= end - 1)
+        {
+          /* Consider [start,end-1] \ [auxmap_start,auxmap_end-1]
+             = [start,auxmap_start-1] u [auxmap_end,end-1].  */
+          if (start < auxmap_start)
+            if (callback (data, start, auxmap_start, flags))
+              break;
+          if (auxmap_end - 1 < end - 1)
+            if (callback (data, auxmap_end, end, flags))
+              break;
+        }
+      else
+        {
+          if (callback (data, start, end, flags))
+            break;
+        }
+    }
+  munmap (auxmap, memneed);
+  close (fd);
+  return 0;
+
+ fail1:
+  munmap (auxmap, memneed);
+ fail2:
+  close (fd);
+  return -1;
+
+# endif
+
+#elif HAVE_PSTAT_GETPROCVM /* HP-UX */
+
+  unsigned long pagesize = getpagesize ();
+  int i;
+
+  for (i = 0; ; i++)
+    {
+      struct pst_vm_status info;
+      int ret = pstat_getprocvm (&info, sizeof (info), 0, i);
+      if (ret < 0)
+        return -1;
+      if (ret == 0)
+        break;
+      {
+        unsigned long start = info.pst_vaddr;
+        unsigned long end = start + info.pst_length * pagesize;
+        unsigned int flags = 0;
+        if (info.pst_permission & PS_PROT_READ)
+          flags |= VMA_PROT_READ;
+        if (info.pst_permission & PS_PROT_WRITE)
+          flags |= VMA_PROT_WRITE;
+        if (info.pst_permission & PS_PROT_EXECUTE)
+          flags |= VMA_PROT_EXECUTE;
+
+        if (callback (data, start, end, flags))
+          break;
+      }
+    }
+
+#elif defined __APPLE__ && defined __MACH__ /* Mac OS X */
+
+  task_t task = mach_task_self ();
+  vm_address_t address;
+  vm_size_t size;
+
+  for (address = VM_MIN_ADDRESS;; address += size)
+    {
+      int more;
+      mach_port_t object_name;
+      unsigned int flags;
+      /* In Mac OS X 10.5, the types vm_address_t, vm_offset_t, vm_size_t have
+         32 bits in 32-bit processes and 64 bits in 64-bit processes. Whereas
+         mach_vm_address_t and mach_vm_size_t are always 64 bits large.
+         Mac OS X 10.5 has three vm_region like methods:
+           - vm_region. It has arguments that depend on whether the current
+             process is 32-bit or 64-bit. When linking dynamically, this
+             function exists only in 32-bit processes. Therefore we use it only
+             in 32-bit processes.
+           - vm_region_64. It has arguments that depend on whether the current
+             process is 32-bit or 64-bit. It interprets a flavor
+             VM_REGION_BASIC_INFO as VM_REGION_BASIC_INFO_64, which is
+             dangerous since 'struct vm_region_basic_info_64' is larger than
+             'struct vm_region_basic_info'; therefore let's write
+             VM_REGION_BASIC_INFO_64 explicitly.
+           - mach_vm_region. It has arguments that are 64-bit always. This
+             function is useful when you want to access the VM of a process
+             other than the current process.
+         In 64-bit processes, we could use vm_region_64 or mach_vm_region.
+         I choose vm_region_64 because it uses the same types as vm_region,
+         resulting in less conditional code.  */
+# if defined __aarch64__ || defined __ppc64__ || defined __x86_64__
+      struct vm_region_basic_info_64 info;
+      mach_msg_type_number_t info_count = VM_REGION_BASIC_INFO_COUNT_64;
+
+      more = (vm_region_64 (task, &address, &size, VM_REGION_BASIC_INFO_64,
+                            (vm_region_info_t)&info, &info_count, &object_name)
+              == KERN_SUCCESS);
+# else
+      struct vm_region_basic_info info;
+      mach_msg_type_number_t info_count = VM_REGION_BASIC_INFO_COUNT;
+
+      more = (vm_region (task, &address, &size, VM_REGION_BASIC_INFO,
+                         (vm_region_info_t)&info, &info_count, &object_name)
+              == KERN_SUCCESS);
+# endif
+      if (object_name != MACH_PORT_NULL)
+        mach_port_deallocate (mach_task_self (), object_name);
+      if (!more)
+        break;
+      flags = 0;
+      if (info.protection & VM_PROT_READ)
+        flags |= VMA_PROT_READ;
+      if (info.protection & VM_PROT_WRITE)
+        flags |= VMA_PROT_WRITE;
+      if (info.protection & VM_PROT_EXECUTE)
+        flags |= VMA_PROT_EXECUTE;
+      if (callback (data, address, address + size, flags))
+        break;
+    }
+  return 0;
+
+#elif defined __GNU__ /* GNU/Hurd */
+
+  /* The Hurd has a /proc/self/maps that looks like the Linux one, but it
+     lacks the VMAs created through anonymous mmap.  Therefore use the Mach
+     API.
+     Documentation:
+     https://www.gnu.org/software/hurd/gnumach-doc/Memory-Attributes.html */
+
+  task_t task = mach_task_self ();
+  vm_address_t address;
+  vm_size_t size;
+
+  for (address = 0;; address += size)
+    {
+      vm_prot_t protection;
+      vm_prot_t max_protection;
+      vm_inherit_t inheritance;
+      boolean_t shared;
+      memory_object_name_t object_name;
+      vm_offset_t offset;
+      unsigned int flags;
+
+      if (!(vm_region (task, &address, &size, &protection, &max_protection,
+                         &inheritance, &shared, &object_name, &offset)
+            == KERN_SUCCESS))
+        break;
+      mach_port_deallocate (task, object_name);
+      flags = 0;
+      if (protection & VM_PROT_READ)
+        flags |= VMA_PROT_READ;
+      if (protection & VM_PROT_WRITE)
+        flags |= VMA_PROT_WRITE;
+      if (protection & VM_PROT_EXECUTE)
+        flags |= VMA_PROT_EXECUTE;
+      if (callback (data, address, address + size, flags))
+        break;
+    }
+  return 0;
+
+#elif defined _WIN32 || defined __CYGWIN__
+  /* Windows platform.  Use the native Windows API.  */
+
+  MEMORY_BASIC_INFORMATION info;
+  uintptr_t address = 0;
+
+  while (VirtualQuery ((void*)address, &info, sizeof(info)) == sizeof(info))
+    {
+      if (info.State != MEM_FREE)
+        /* Ignore areas where info.State has the value MEM_RESERVE or,
+           equivalently, info.Protect has the undocumented value 0.
+           This is needed, so that on Cygwin, areas used by malloc() are
+           distinguished from areas reserved for future malloc().  */
+        if (info.State != MEM_RESERVE)
+          {
+            uintptr_t start, end;
+            unsigned int flags;
+
+            start = (uintptr_t)info.BaseAddress;
+            end = start + info.RegionSize;
+            switch (info.Protect & ~(PAGE_GUARD|PAGE_NOCACHE))
+              {
+              case PAGE_READONLY:
+                flags = VMA_PROT_READ;
+                break;
+              case PAGE_READWRITE:
+              case PAGE_WRITECOPY:
+                flags = VMA_PROT_READ | VMA_PROT_WRITE;
+                break;
+              case PAGE_EXECUTE:
+                flags = VMA_PROT_EXECUTE;
+                break;
+              case PAGE_EXECUTE_READ:
+                flags = VMA_PROT_READ | VMA_PROT_EXECUTE;
+                break;
+              case PAGE_EXECUTE_READWRITE:
+              case PAGE_EXECUTE_WRITECOPY:
+                flags = VMA_PROT_READ | VMA_PROT_WRITE | VMA_PROT_EXECUTE;
+                break;
+              case PAGE_NOACCESS:
+              default:
+                flags = 0;
+                break;
+              }
+
+            if (callback (data, start, end, flags))
+              break;
+          }
+      address = (uintptr_t)info.BaseAddress + info.RegionSize;
+    }
+  return 0;
+
+#elif defined __BEOS__ || defined __HAIKU__
+  /* Use the BeOS specific API.  */
+
+  area_info info;
+  ssize_t cookie;
+
+  cookie = 0;
+  while (get_next_area_info (0, &cookie, &info) == B_OK)
+    {
+      unsigned long start, end;
+      unsigned int flags;
+
+      start = (unsigned long) info.address;
+      end = start + info.size;
+      flags = 0;
+      if (info.protection & B_READ_AREA)
+        flags |= VMA_PROT_READ | VMA_PROT_EXECUTE;
+      if (info.protection & B_WRITE_AREA)
+        flags |= VMA_PROT_WRITE;
+
+      if (callback (data, start, end, flags))
+        break;
+    }
+  return 0;
+
+#elif HAVE_MQUERY /* OpenBSD */
+
+# if defined __OpenBSD__
+  /* Try sysctl() first.  It is more efficient than the mquery() loop below
+     and also provides the flags.  */
+  {
+    int retval = vma_iterate_bsd (callback, data);
+    if (retval == 0)
+      return 0;
+  }
+# endif
+
+  {
+    uintptr_t pagesize;
+    uintptr_t address;
+    int /*bool*/ address_known_mapped;
+
+    pagesize = getpagesize ();
+    /* Avoid calling mquery with a NULL first argument, because this argument
+       value has a specific meaning.  We know the NULL page is unmapped.  */
+    address = pagesize;
+    address_known_mapped = 0;
+    for (;;)
+      {
+        /* Test whether the page at address is mapped.  */
+        if (address_known_mapped
+            || mquery ((void *) address, pagesize, 0, MAP_FIXED, -1, 0)
+               == (void *) -1)
+          {
+            /* The page at address is mapped.
+               This is the start of an interval.  */
+            uintptr_t start = address;
+            uintptr_t end;
+
+            /* Find the end of the interval.  */
+            end = (uintptr_t) mquery ((void *) address, pagesize, 0, 0, -1, 0);
+            if (end == (uintptr_t) (void *) -1)
+              end = 0; /* wrap around */
+            address = end;
+
+            /* It's too complicated to find out about the flags.
+               Just pass 0.  */
+            if (callback (data, start, end, 0))
+              break;
+
+            if (address < pagesize) /* wrap around? */
+              break;
+          }
+        /* Here we know that the page at address is unmapped.  */
+        {
+          uintptr_t query_size = pagesize;
+
+          address += pagesize;
+
+          /* Query larger and larger blocks, to get through the unmapped address
+             range with few mquery() calls.  */
+          for (;;)
+            {
+              if (2 * query_size > query_size)
+                query_size = 2 * query_size;
+              if (address + query_size - 1 < query_size) /* wrap around? */
+                {
+                  address_known_mapped = 0;
+                  break;
+                }
+              if (mquery ((void *) address, query_size, 0, MAP_FIXED, -1, 0)
+                  == (void *) -1)
+                {
+                  /* Not all the interval [address .. address + query_size - 1]
+                     is unmapped.  */
+                  address_known_mapped = (query_size == pagesize);
+                  break;
+                }
+              /* The interval [address .. address + query_size - 1] is
+                 unmapped.  */
+              address += query_size;
+            }
+          /* Reduce the query size again, to determine the precise size of the
+             unmapped interval that starts at address.  */
+          while (query_size > pagesize)
+            {
+              query_size = query_size / 2;
+              if (address + query_size - 1 >= query_size)
+                {
+                  if (mquery ((void *) address, query_size, 0, MAP_FIXED, -1, 0)
+                      != (void *) -1)
+                    {
+                      /* The interval [address .. address + query_size - 1] is
+                         unmapped.  */
+                      address += query_size;
+                      address_known_mapped = 0;
+                    }
+                  else
+                    address_known_mapped = (query_size == pagesize);
+                }
+            }
+          /* Here again query_size = pagesize, and
+             either address + pagesize - 1 < pagesize, or
+             mquery ((void *) address, pagesize, 0, MAP_FIXED, -1, 0) fails.
+             So, the unmapped area ends at address.  */
+        }
+        if (address + pagesize - 1 < pagesize) /* wrap around? */
+          break;
+      }
+    return 0;
+  }
+
+#else
+
+  /* Not implemented.  */
+  return -1;
+
+#endif
+}
+
+
+#ifdef TEST
+
+#include <stdio.h>
+
+/* Output the VMAs of the current process in a format similar to the Linux
+   /proc/$pid/maps file.  */
+
+static int
+vma_iterate_callback (void *data, uintptr_t start, uintptr_t end,
+                      unsigned int flags)
+{
+  printf ("%08lx-%08lx %c%c%c\n",
+          (unsigned long) start, (unsigned long) end,
+          flags & VMA_PROT_READ ? 'r' : '-',
+          flags & VMA_PROT_WRITE ? 'w' : '-',
+          flags & VMA_PROT_EXECUTE ? 'x' : '-');
+  return 0;
+}
+
+int
+main ()
+{
+  vma_iterate (vma_iterate_callback, NULL);
+
+  /* Let the user interactively look at the /proc file system.  */
+  sleep (10);
+
+  return 0;
+}
+
+/*
+ * Local Variables:
+ * compile-command: "gcc -ggdb -DTEST -Wall -I.. vma-iter.c"
+ * End:
+ */
+
+#endif /* TEST */
diff --git a/src/gl/tests/vma-iter.h b/src/gl/tests/vma-iter.h
new file mode 100644
index 0000000..58f854f
--- /dev/null
+++ b/src/gl/tests/vma-iter.h
@@ -0,0 +1,64 @@
+/* Iteration over virtual memory areas.
+   Copyright (C) 2011-2021 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _VMA_ITER_H
+#define _VMA_ITER_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Bit mask for the FLAGS parameter of a vma_iterate callback function.  */
+#define VMA_PROT_READ    (1<<0)
+#define VMA_PROT_WRITE   (1<<1)
+#define VMA_PROT_EXECUTE (1<<2)
+
+typedef int (*vma_iterate_callback_fn) (void *data,
+                                        uintptr_t start, uintptr_t end,
+                                        unsigned int flags);
+
+/* Iterate over the virtual memory areas of the current process.
+   If such iteration is supported, the callback is called once for every
+   virtual memory area, in ascending order, with the following arguments:
+     - DATA is the same argument as passed to vma_iterate.
+     - START is the address of the first byte in the area, page-aligned.
+     - END is the address of the last byte in the area plus 1, page-aligned.
+       Note that it may be 0 for the last area in the address space.
+     - FLAGS is a combination of the VMA_* bits.
+   If the callback returns 0, the iteration continues.  If it returns 1,
+   the iteration terminates prematurely.
+   This function may open file descriptors, but does not call malloc().
+   Return 0 if all went well, or -1 in case of error.  */
+extern int vma_iterate (vma_iterate_callback_fn callback, void *data);
+
+/* The macro VMA_ITERATE_SUPPORTED indicates that vma_iterate is supported on
+   this platform.
+   Note that even when this macro is defined, vma_iterate() may still fail to
+   find any virtual memory area, for example if /proc is not mounted.  */
+#if defined __linux__ || defined __ANDROID__ || defined __GNU__ || defined __FreeBSD_kernel__ || defined __FreeBSD__ || defined __DragonFly__ || defined __NetBSD__ || defined __sgi || defined __osf__ || defined __sun || HAVE_PSTAT_GETPROCVM || (defined __APPLE__ && defined __MACH__) || defined _WIN32 || defined __CYGWIN__ || defined __BEOS__ || defined __HAIKU__ || defined __minix || HAVE_MQUERY
+# define VMA_ITERATE_SUPPORTED 1
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _VMA_ITER_H */
diff --git a/src/gl/tests/w32sock.h b/src/gl/tests/w32sock.h
new file mode 100644
index 0000000..f731188
--- /dev/null
+++ b/src/gl/tests/w32sock.h
@@ -0,0 +1,140 @@
+/* w32sock.h --- internal auxiliary functions for Windows socket functions
+
+   Copyright (C) 2008-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paolo Bonzini */
+
+#include <errno.h>
+
+/* Get O_RDWR and O_BINARY.  */
+#include <fcntl.h>
+
+/* Get _open_osfhandle().  */
+#include <io.h>
+
+/* Get _get_osfhandle().  */
+#if GNULIB_MSVC_NOTHROW
+# include "msvc-nothrow.h"
+#else
+# include <io.h>
+#endif
+
+#define FD_TO_SOCKET(fd)   ((SOCKET) _get_osfhandle ((fd)))
+#define SOCKET_TO_FD(fh)   (_open_osfhandle ((intptr_t) (fh), O_RDWR | O_BINARY))
+
+static inline void
+set_winsock_errno (void)
+{
+  int err = WSAGetLastError ();
+
+  /* Map some WSAE* errors to the runtime library's error codes.  */
+  switch (err)
+    {
+    case WSA_INVALID_HANDLE:
+      errno = EBADF;
+      break;
+    case WSA_NOT_ENOUGH_MEMORY:
+      errno = ENOMEM;
+      break;
+    case WSA_INVALID_PARAMETER:
+      errno = EINVAL;
+      break;
+    case WSAENAMETOOLONG:
+      errno = ENAMETOOLONG;
+      break;
+    case WSAENOTEMPTY:
+      errno = ENOTEMPTY;
+      break;
+    case WSAEWOULDBLOCK:
+      errno = EWOULDBLOCK;
+      break;
+    case WSAEINPROGRESS:
+      errno = EINPROGRESS;
+      break;
+    case WSAEALREADY:
+      errno = EALREADY;
+      break;
+    case WSAENOTSOCK:
+      errno = ENOTSOCK;
+      break;
+    case WSAEDESTADDRREQ:
+      errno = EDESTADDRREQ;
+      break;
+    case WSAEMSGSIZE:
+      errno = EMSGSIZE;
+      break;
+    case WSAEPROTOTYPE:
+      errno = EPROTOTYPE;
+      break;
+    case WSAENOPROTOOPT:
+      errno = ENOPROTOOPT;
+      break;
+    case WSAEPROTONOSUPPORT:
+      errno = EPROTONOSUPPORT;
+      break;
+    case WSAEOPNOTSUPP:
+      errno = EOPNOTSUPP;
+      break;
+    case WSAEAFNOSUPPORT:
+      errno = EAFNOSUPPORT;
+      break;
+    case WSAEADDRINUSE:
+      errno = EADDRINUSE;
+      break;
+    case WSAEADDRNOTAVAIL:
+      errno = EADDRNOTAVAIL;
+      break;
+    case WSAENETDOWN:
+      errno = ENETDOWN;
+      break;
+    case WSAENETUNREACH:
+      errno = ENETUNREACH;
+      break;
+    case WSAENETRESET:
+      errno = ENETRESET;
+      break;
+    case WSAECONNABORTED:
+      errno = ECONNABORTED;
+      break;
+    case WSAECONNRESET:
+      errno = ECONNRESET;
+      break;
+    case WSAENOBUFS:
+      errno = ENOBUFS;
+      break;
+    case WSAEISCONN:
+      errno = EISCONN;
+      break;
+    case WSAENOTCONN:
+      errno = ENOTCONN;
+      break;
+    case WSAETIMEDOUT:
+      errno = ETIMEDOUT;
+      break;
+    case WSAECONNREFUSED:
+      errno = ECONNREFUSED;
+      break;
+    case WSAELOOP:
+      errno = ELOOP;
+      break;
+    case WSAEHOSTUNREACH:
+      errno = EHOSTUNREACH;
+      break;
+    default:
+      errno = (err > 10000 && err < 10025) ? err - 10000 : err;
+      break;
+    }
+}
diff --git a/src/gl/tests/warn-on-use.h b/src/gl/tests/warn-on-use.h
new file mode 100644
index 0000000..5d5b17f
--- /dev/null
+++ b/src/gl/tests/warn-on-use.h
@@ -0,0 +1,149 @@
+/* A C macro for emitting warnings if a function is used.
+   Copyright (C) 2010-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* _GL_WARN_ON_USE (function, "literal string") issues a declaration
+   for FUNCTION which will then trigger a compiler warning containing
+   the text of "literal string" anywhere that function is called, if
+   supported by the compiler.  If the compiler does not support this
+   feature, the macro expands to an unused extern declaration.
+
+   _GL_WARN_ON_USE_ATTRIBUTE ("literal string") expands to the
+   attribute used in _GL_WARN_ON_USE.  If the compiler does not support
+   this feature, it expands to empty.
+
+   These macros are useful for marking a function as a potential
+   portability trap, with the intent that "literal string" include
+   instructions on the replacement function that should be used
+   instead.
+   _GL_WARN_ON_USE is for functions with 'extern' linkage.
+   _GL_WARN_ON_USE_ATTRIBUTE is for functions with 'static' or 'inline'
+   linkage.
+
+   However, one of the reasons that a function is a portability trap is
+   if it has the wrong signature.  Declaring FUNCTION with a different
+   signature in C is a compilation error, so this macro must use the
+   same type as any existing declaration so that programs that avoid
+   the problematic FUNCTION do not fail to compile merely because they
+   included a header that poisoned the function.  But this implies that
+   _GL_WARN_ON_USE is only safe to use if FUNCTION is known to already
+   have a declaration.  Use of this macro implies that there must not
+   be any other macro hiding the declaration of FUNCTION; but
+   undefining FUNCTION first is part of the poisoning process anyway
+   (although for symbols that are provided only via a macro, the result
+   is a compilation error rather than a warning containing
+   "literal string").  Also note that in C++, it is only safe to use if
+   FUNCTION has no overloads.
+
+   For an example, it is possible to poison 'getline' by:
+   - adding a call to gl_WARN_ON_USE_PREPARE([[#include <stdio.h>]],
+     [getline]) in configure.ac, which potentially defines
+     HAVE_RAW_DECL_GETLINE
+   - adding this code to a header that wraps the system <stdio.h>:
+     #undef getline
+     #if HAVE_RAW_DECL_GETLINE
+     _GL_WARN_ON_USE (getline, "getline is required by POSIX 2008, but"
+       "not universally present; use the gnulib module getline");
+     #endif
+
+   It is not possible to directly poison global variables.  But it is
+   possible to write a wrapper accessor function, and poison that
+   (less common usage, like &environ, will cause a compilation error
+   rather than issue the nice warning, but the end result of informing
+   the developer about their portability problem is still achieved):
+     #if HAVE_RAW_DECL_ENVIRON
+     static char ***
+     rpl_environ (void) { return &environ; }
+     _GL_WARN_ON_USE (rpl_environ, "environ is not always properly declared");
+     # undef environ
+     # define environ (*rpl_environ ())
+     #endif
+   or better (avoiding contradictory use of 'static' and 'extern'):
+     #if HAVE_RAW_DECL_ENVIRON
+     static char ***
+     _GL_WARN_ON_USE_ATTRIBUTE ("environ is not always properly declared")
+     rpl_environ (void) { return &environ; }
+     # undef environ
+     # define environ (*rpl_environ ())
+     #endif
+   */
+#ifndef _GL_WARN_ON_USE
+
+# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
+/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
+#  define _GL_WARN_ON_USE(function, message) \
+extern __typeof__ (function) function __attribute__ ((__warning__ (message)))
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
+  __attribute__ ((__warning__ (message)))
+# elif __clang_major__ >= 4
+/* Another compiler attribute is available in clang.  */
+#  define _GL_WARN_ON_USE(function, message) \
+extern __typeof__ (function) function \
+  __attribute__ ((__diagnose_if__ (1, message, "warning")))
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
+  __attribute__ ((__diagnose_if__ (1, message, "warning")))
+# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
+/* Verify the existence of the function.  */
+#  define _GL_WARN_ON_USE(function, message) \
+extern __typeof__ (function) function
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
+# else /* Unsupported.  */
+#  define _GL_WARN_ON_USE(function, message) \
+_GL_WARN_EXTERN_C int _gl_warn_on_use
+#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
+# endif
+#endif
+
+/* _GL_WARN_ON_USE_CXX (function, rettype_gcc, rettype_clang, parameters_and_attributes, "message")
+   is like _GL_WARN_ON_USE (function, "message"), except that in C++ mode the
+   function is declared with the given prototype, consisting of return type,
+   parameters, and attributes.
+   This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does
+   not work in this case.  */
+#ifndef _GL_WARN_ON_USE_CXX
+# if !defined __cplusplus
+#  define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+     _GL_WARN_ON_USE (function, msg)
+# else
+#  if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
+/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+extern rettype_gcc function parameters_and_attributes \
+  __attribute__ ((__warning__ (msg)))
+#  elif __clang_major__ >= 4
+/* Another compiler attribute is available in clang.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+extern rettype_clang function parameters_and_attributes \
+  __attribute__ ((__diagnose_if__ (1, msg, "warning")))
+#  elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
+/* Verify the existence of the function.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+extern rettype_gcc function parameters_and_attributes
+#  else /* Unsupported.  */
+#   define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \
+_GL_WARN_EXTERN_C int _gl_warn_on_use
+#  endif
+# endif
+#endif
+
+/* _GL_WARN_EXTERN_C declaration;
+   performs the declaration with C linkage.  */
+#ifndef _GL_WARN_EXTERN_C
+# if defined __cplusplus
+#  define _GL_WARN_EXTERN_C extern "C"
+# else
+#  define _GL_WARN_EXTERN_C extern
+# endif
+#endif
diff --git a/src/gl/tests/windows-initguard.h b/src/gl/tests/windows-initguard.h
new file mode 100644
index 0000000..afdd8e7
--- /dev/null
+++ b/src/gl/tests/windows-initguard.h
@@ -0,0 +1,35 @@
+/* Init guards, somewhat like spinlocks (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#ifndef _WINDOWS_INITGUARD_H
+#define _WINDOWS_INITGUARD_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+typedef struct
+        {
+          volatile int done;
+          volatile LONG started;
+        }
+        glwthread_initguard_t;
+
+#define GLWTHREAD_INITGUARD_INIT { 0, -1 }
+
+#endif /* _WINDOWS_INITGUARD_H */
diff --git a/src/gl/tests/windows-thread.c b/src/gl/tests/windows-thread.c
new file mode 100644
index 0000000..34671a2
--- /dev/null
+++ b/src/gl/tests/windows-thread.c
@@ -0,0 +1,243 @@
+/* Creating and controlling threads (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "windows-thread.h"
+
+#include <errno.h>
+#include <process.h>
+#include <stdlib.h>
+
+#include "windows-once.h"
+#include "windows-tls.h"
+
+/* The Thread-Local Storage (TLS) key that allows to access each thread's
+   'struct glwthread_thread_struct *' pointer.  */
+static DWORD self_key = (DWORD)-1;
+
+/* Initializes self_key.  This function must only be called once.  */
+static void
+do_init_self_key (void)
+{
+  self_key = TlsAlloc ();
+  /* If this fails, we're hosed.  */
+  if (self_key == (DWORD)-1)
+    abort ();
+}
+
+/* Initializes self_key.  */
+static void
+init_self_key (void)
+{
+  static glwthread_once_t once = GLWTHREAD_ONCE_INIT;
+  glwthread_once (&once, do_init_self_key);
+}
+
+/* This structure contains information about a thread.
+   It is stored in TLS under key self_key.  */
+struct glwthread_thread_struct
+{
+  /* Fields for managing the handle.  */
+  HANDLE volatile handle;
+  CRITICAL_SECTION handle_lock;
+  /* Fields for managing the exit value.  */
+  BOOL volatile detached;
+  void * volatile result;
+  /* Fields for managing the thread start.  */
+  void * (*func) (void *);
+  void *arg;
+};
+
+/* Return a real HANDLE object for the current thread.  */
+static HANDLE
+get_current_thread_handle (void)
+{
+  HANDLE this_handle;
+
+  /* GetCurrentThread() returns a pseudo-handle, i.e. only a symbolic
+     identifier, not a real handle.  */
+  if (!DuplicateHandle (GetCurrentProcess (), GetCurrentThread (),
+                        GetCurrentProcess (), &this_handle,
+                        0, FALSE, DUPLICATE_SAME_ACCESS))
+    abort ();
+  return this_handle;
+}
+
+glwthread_thread_t
+glwthread_thread_self (void)
+{
+  glwthread_thread_t thread;
+
+  if (self_key == (DWORD)-1)
+    init_self_key ();
+  thread = TlsGetValue (self_key);
+  if (thread == NULL)
+    {
+      /* This happens only in threads that have not been created through
+         glthread_create(), such as the main thread.  */
+      for (;;)
+        {
+          thread =
+            (struct glwthread_thread_struct *)
+            malloc (sizeof (struct glwthread_thread_struct));
+          if (thread != NULL)
+            break;
+          /* Memory allocation failed.  There is not much we can do.  Have to
+             busy-loop, waiting for the availability of memory.  */
+          Sleep (1);
+        }
+
+      thread->handle = get_current_thread_handle ();
+      InitializeCriticalSection (&thread->handle_lock);
+      thread->detached = FALSE; /* This can lead to a memory leak.  */
+      thread->result = NULL; /* just to be deterministic */
+      TlsSetValue (self_key, thread);
+    }
+  return thread;
+}
+
+/* The main function of a freshly creating thread.  It's a wrapper around
+   the FUNC and ARG arguments passed to glthread_create_func.  */
+static unsigned int WINAPI
+wrapper_func (void *varg)
+{
+  struct glwthread_thread_struct *thread =
+    (struct glwthread_thread_struct *) varg;
+
+  EnterCriticalSection (&thread->handle_lock);
+  /* Create a new handle for the thread only if the parent thread did not yet
+     fill in the handle.  */
+  if (thread->handle == NULL)
+    thread->handle = get_current_thread_handle ();
+  LeaveCriticalSection (&thread->handle_lock);
+
+  if (self_key == (DWORD)-1)
+    init_self_key ();
+  TlsSetValue (self_key, thread);
+
+  /* Run the thread.  Store the exit value if the thread was not terminated
+     otherwise.  */
+  thread->result = thread->func (thread->arg);
+
+  /* Process the TLS destructors.  */
+  glwthread_tls_process_destructors ();
+
+  if (thread->detached)
+    {
+      /* Clean up the thread, like thrd_join would do.  */
+      DeleteCriticalSection (&thread->handle_lock);
+      CloseHandle (thread->handle);
+      free (thread);
+    }
+
+  return 0;
+}
+
+int
+glwthread_thread_create (glwthread_thread_t *threadp, unsigned int attr,
+                         void * (*func) (void *), void *arg)
+{
+  struct glwthread_thread_struct *thread =
+    (struct glwthread_thread_struct *)
+    malloc (sizeof (struct glwthread_thread_struct));
+  if (thread == NULL)
+    return ENOMEM;
+  thread->handle = NULL;
+  InitializeCriticalSection (&thread->handle_lock);
+  thread->detached = (attr & GLWTHREAD_ATTR_DETACHED ? TRUE : FALSE);
+  thread->result = NULL; /* just to be deterministic */
+  thread->func = func;
+  thread->arg = arg;
+
+  {
+    unsigned int thread_id;
+    HANDLE thread_handle;
+
+    thread_handle = (HANDLE)
+      _beginthreadex (NULL, 100000, wrapper_func, thread, 0, &thread_id);
+      /* calls CreateThread with the same arguments */
+    if (thread_handle == NULL)
+      {
+        DeleteCriticalSection (&thread->handle_lock);
+        free (thread);
+        return EAGAIN;
+      }
+
+    EnterCriticalSection (&thread->handle_lock);
+    if (thread->handle == NULL)
+      thread->handle = thread_handle;
+    else
+      /* thread->handle was already set by the thread itself.  */
+      CloseHandle (thread_handle);
+    LeaveCriticalSection (&thread->handle_lock);
+
+    *threadp = thread;
+    return 0;
+  }
+}
+
+int
+glwthread_thread_join (glwthread_thread_t thread, void **retvalp)
+{
+  if (thread == NULL)
+    return EINVAL;
+
+  if (thread == glwthread_thread_self ())
+    return EDEADLK;
+
+  if (thread->detached)
+    return EINVAL;
+
+  if (WaitForSingleObject (thread->handle, INFINITE) == WAIT_FAILED)
+    return EINVAL;
+
+  if (retvalp != NULL)
+    *retvalp = thread->result;
+
+  DeleteCriticalSection (&thread->handle_lock);
+  CloseHandle (thread->handle);
+  free (thread);
+
+  return 0;
+}
+
+int
+glwthread_thread_detach (glwthread_thread_t thread)
+{
+  if (thread == NULL)
+    return EINVAL;
+
+  if (thread->detached)
+    return EINVAL;
+
+  thread->detached = TRUE;
+  return 0;
+}
+
+void
+glwthread_thread_exit (void *retval)
+{
+  glwthread_thread_t thread = glwthread_thread_self ();
+  thread->result = retval;
+  glwthread_tls_process_destructors ();
+  _endthreadex (0); /* calls ExitThread (0) */
+  abort ();
+}
diff --git a/src/gl/tests/windows-thread.h b/src/gl/tests/windows-thread.h
new file mode 100644
index 0000000..c496594
--- /dev/null
+++ b/src/gl/tests/windows-thread.h
@@ -0,0 +1,55 @@
+/* Creating and controlling threads (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+   Based on GCC's gthr-win32.h.  */
+
+#ifndef _WINDOWS_THREAD_H
+#define _WINDOWS_THREAD_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+/* The glwthread_thread_t is a pointer to a structure in memory.
+   Why not the thread handle?  If it were the thread handle, it would be hard
+   to implement glwthread_thread_self() (since GetCurrentThread () returns a
+   pseudo-handle, DuplicateHandle (GetCurrentThread ()) returns a handle that
+   must be closed afterwards, and there is no function for quickly retrieving
+   a thread handle from its id).
+   Why not the thread id?  I tried it.  It did not work: Sometimes ids appeared
+   that did not belong to running threads, and glthread_join failed with ESRCH.
+ */
+typedef struct glwthread_thread_struct *glwthread_thread_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* attr is a bit mask, consisting of the following bits: */
+#define GLWTHREAD_ATTR_DETACHED 1
+extern int glwthread_thread_create (glwthread_thread_t *threadp,
+                                    unsigned int attr,
+                                    void * (*func) (void *), void *arg);
+extern int glwthread_thread_join (glwthread_thread_t thread, void **retvalp);
+extern int glwthread_thread_detach (glwthread_thread_t thread);
+extern glwthread_thread_t glwthread_thread_self (void);
+extern _Noreturn void glwthread_thread_exit (void *retval);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WINDOWS_THREAD_H */
diff --git a/src/gl/tests/windows-tls.c b/src/gl/tests/windows-tls.c
new file mode 100644
index 0000000..55c77a4
--- /dev/null
+++ b/src/gl/tests/windows-tls.c
@@ -0,0 +1,339 @@
+/* Thread-local storage (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "windows-tls.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#include "windows-once.h"
+
+void *
+glwthread_tls_get (glwthread_tls_key_t key)
+{
+  return TlsGetValue (key);
+}
+
+int
+glwthread_tls_set (glwthread_tls_key_t key, void *value)
+{
+  if (!TlsSetValue (key, value))
+    return EINVAL;
+  return 0;
+}
+
+/* The following variables keep track of TLS keys with non-NULL destructor.  */
+
+static glwthread_once_t dtor_table_init_once = GLWTHREAD_ONCE_INIT;
+
+static CRITICAL_SECTION dtor_table_lock;
+
+struct dtor { glwthread_tls_key_t key; void (*destructor) (void *); };
+
+/* The table of dtors.  */
+static struct dtor *dtor_table;
+/* Number of active entries in the dtor_table.  */
+static unsigned int dtors_count;
+/* Valid indices into dtor_table are 0..dtors_used-1.  */
+static unsigned int dtors_used;
+/* Allocation size of dtor_table.  */
+static unsigned int dtors_allocated;
+/* Invariant: 0 <= dtors_count <= dtors_used <= dtors_allocated.  */
+
+/* Number of threads that are currently processing destructors.  */
+static unsigned int dtor_processing_threads;
+
+static void
+dtor_table_initialize (void)
+{
+  InitializeCriticalSection (&dtor_table_lock);
+  /* The other variables are already initialized to NULL or 0, respectively.  */
+}
+
+static void
+dtor_table_ensure_initialized (void)
+{
+  glwthread_once (&dtor_table_init_once, dtor_table_initialize);
+}
+
+/* Shrinks dtors_used down to dtors_count, by replacing inactive entries
+   with active ones.  */
+static void
+dtor_table_shrink_used (void)
+{
+  unsigned int i = 0;
+  unsigned int j = dtors_used;
+
+  for (;;)
+    {
+      BOOL i_found = FALSE;
+      BOOL j_found = FALSE;
+      /* Find the next inactive entry, from the left.  */
+      for (; i < dtors_count;)
+        {
+          if (dtor_table[i].destructor == NULL)
+            {
+              i_found = TRUE;
+              break;
+            }
+          i++;
+        }
+
+      /* Find the next active entry, from the right.  */
+      for (; j > dtors_count;)
+        {
+          j--;
+          if (dtor_table[j].destructor != NULL)
+            {
+              j_found = TRUE;
+              break;
+            }
+        }
+
+      if (i_found != j_found)
+        /* dtors_count was apparently wrong.  */
+        abort ();
+
+      if (!i_found)
+        break;
+
+      /* i_found and j_found are TRUE.  Swap the two entries.  */
+      dtor_table[i] = dtor_table[j];
+
+      i++;
+    }
+
+  dtors_used = dtors_count;
+}
+
+void
+glwthread_tls_process_destructors (void)
+{
+  unsigned int repeat;
+
+  dtor_table_ensure_initialized ();
+
+  EnterCriticalSection (&dtor_table_lock);
+  if (dtor_processing_threads == 0)
+    {
+      /* Now it's the appropriate time for shrinking dtors_used.  */
+      if (dtors_used > dtors_count)
+        dtor_table_shrink_used ();
+    }
+  dtor_processing_threads++;
+
+  for (repeat = GLWTHREAD_DESTRUCTOR_ITERATIONS; repeat > 0; repeat--)
+    {
+      unsigned int destructors_run = 0;
+
+      /* Iterate across dtor_table.  We don't need to make a copy of dtor_table,
+         because
+           * When another thread calls glwthread_tls_key_create with a non-NULL
+             destructor argument, this will possibly reallocate the dtor_table
+             array and increase dtors_allocated as well as dtors_used and
+             dtors_count, but it will not change dtors_used nor the contents of
+             the first dtors_used entries of dtor_table.
+           * When another thread calls glwthread_tls_key_delete, this will
+             possibly set some 'destructor' member to NULL, thus marking an
+             entry as inactive, but it will not otherwise change dtors_used nor
+             the contents of the first dtors_used entries of dtor_table.  */
+      unsigned int i_limit = dtors_used;
+      unsigned int i;
+
+      for (i = 0; i < i_limit; i++)
+        {
+          struct dtor current = dtor_table[i];
+          if (current.destructor != NULL)
+            {
+              /* The current dtor has not been deleted yet.  */
+              void *current_value = glwthread_tls_get (current.key);
+              if (current_value != NULL)
+                {
+                  /* The current value is non-NULL.  Run the destructor.  */
+                  glwthread_tls_set (current.key, NULL);
+                  LeaveCriticalSection (&dtor_table_lock);
+                  current.destructor (current_value);
+                  EnterCriticalSection (&dtor_table_lock);
+                  destructors_run++;
+                }
+            }
+        }
+
+      /* When all TLS values were already NULL, no further iterations are
+         needed.  */
+      if (destructors_run == 0)
+        break;
+    }
+
+  dtor_processing_threads--;
+  LeaveCriticalSection (&dtor_table_lock);
+}
+
+int
+glwthread_tls_key_create (glwthread_tls_key_t *keyp, void (*destructor) (void *))
+{
+  if (destructor != NULL)
+    {
+      dtor_table_ensure_initialized ();
+
+      EnterCriticalSection (&dtor_table_lock);
+      if (dtor_processing_threads == 0)
+        {
+          /* Now it's the appropriate time for shrinking dtors_used.  */
+          if (dtors_used > dtors_count)
+            dtor_table_shrink_used ();
+        }
+
+      while (dtors_used == dtors_allocated)
+        {
+          /* Need to grow the dtor_table.  */
+          unsigned int new_allocated = 2 * dtors_allocated + 1;
+          if (new_allocated < 7)
+            new_allocated = 7;
+          if (new_allocated <= dtors_allocated) /* overflow? */
+            new_allocated = UINT_MAX;
+
+          LeaveCriticalSection (&dtor_table_lock);
+          {
+            struct dtor *new_table =
+              (struct dtor *) malloc (new_allocated * sizeof (struct dtor));
+            if (new_table == NULL)
+              return ENOMEM;
+            EnterCriticalSection (&dtor_table_lock);
+            /* Attention! dtors_used, dtors_allocated may have changed!  */
+            if (dtors_used < new_allocated)
+              {
+                if (dtors_allocated < new_allocated)
+                  {
+                    /* The new_table is useful.  */
+                    memcpy (new_table, dtor_table,
+                            dtors_used * sizeof (struct dtor));
+                    dtor_table = new_table;
+                    dtors_allocated = new_allocated;
+                  }
+                else
+                  {
+                    /* The new_table is not useful, since another thread
+                       meanwhile allocated a drop_table that is at least
+                       as large.  */
+                    free (new_table);
+                  }
+                break;
+              }
+            /* The new_table is not useful, since other threads increased
+               dtors_used.  Free it any retry.  */
+            free (new_table);
+          }
+        }
+      /* Here dtors_used < dtors_allocated.  */
+      {
+        /* Allocate a new key.  */
+        glwthread_tls_key_t key = TlsAlloc ();
+        if (key == (DWORD)-1)
+          {
+            LeaveCriticalSection (&dtor_table_lock);
+            return EAGAIN;
+          }
+        /* Store the new dtor in the dtor_table, after all used entries.
+           Do not overwrite inactive entries with indices < dtors_used, in order
+           not to disturb glwthread_tls_process_destructors invocations that may
+           be executing in other threads.  */
+        dtor_table[dtors_used].key = key;
+        dtor_table[dtors_used].destructor = destructor;
+        dtors_used++;
+        dtors_count++;
+        LeaveCriticalSection (&dtor_table_lock);
+        *keyp = key;
+      }
+    }
+  else
+    {
+      /* Allocate a new key.  */
+      glwthread_tls_key_t key = TlsAlloc ();
+      if (key == (DWORD)-1)
+        return EAGAIN;
+      *keyp = key;
+    }
+  return 0;
+}
+
+int
+glwthread_tls_key_delete (glwthread_tls_key_t key)
+{
+  /* Should the destructor be called for all threads that are currently running?
+     Probably not, because
+       - ISO C does not specify when the destructor is to be invoked at all.
+       - In POSIX, the destructor functions specified with pthread_key_create()
+         are invoked at thread exit.
+       - It would be hard to implement, because there are no primitives for
+         accessing thread-specific values from a different thread.  */
+  dtor_table_ensure_initialized ();
+
+  EnterCriticalSection (&dtor_table_lock);
+  if (dtor_processing_threads == 0)
+    {
+      /* Now it's the appropriate time for shrinking dtors_used.  */
+      if (dtors_used > dtors_count)
+        dtor_table_shrink_used ();
+      /* Here dtors_used == dtors_count.  */
+
+      /* Find the key in dtor_table.  */
+      {
+        unsigned int i_limit = dtors_used;
+        unsigned int i;
+
+        for (i = 0; i < i_limit; i++)
+          if (dtor_table[i].key == key)
+            {
+              if (i < dtors_used - 1)
+                /* Swap the entries i and dtors_used - 1.  */
+                dtor_table[i] = dtor_table[dtors_used - 1];
+              dtors_count = dtors_used = dtors_used - 1;
+              break;
+            }
+      }
+    }
+  else
+    {
+      /* Be careful not to disturb the glwthread_tls_process_destructors
+         invocations that are executing in other threads.  */
+      unsigned int i_limit = dtors_used;
+      unsigned int i;
+
+      for (i = 0; i < i_limit; i++)
+        if (dtor_table[i].destructor != NULL /* skip inactive entries */
+            && dtor_table[i].key == key)
+          {
+            /* Mark this entry as inactive.  */
+            dtor_table[i].destructor = NULL;
+            dtors_count = dtors_count - 1;
+            break;
+          }
+    }
+  LeaveCriticalSection (&dtor_table_lock);
+  /* Now we have ensured that glwthread_tls_process_destructors will no longer
+     use this key.  */
+
+  if (!TlsFree (key))
+    return EINVAL;
+  return 0;
+}
diff --git a/src/gl/tests/windows-tls.h b/src/gl/tests/windows-tls.h
new file mode 100644
index 0000000..2f7f662
--- /dev/null
+++ b/src/gl/tests/windows-tls.h
@@ -0,0 +1,42 @@
+/* Thread-local storage (native Windows implementation).
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
+
+#ifndef _WINDOWS_TLS_H
+#define _WINDOWS_TLS_H
+
+#define WIN32_LEAN_AND_MEAN  /* avoid including junk */
+#include <windows.h>
+
+typedef DWORD glwthread_tls_key_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int glwthread_tls_key_create (glwthread_tls_key_t *keyp, void (*destructor) (void *));
+extern void *glwthread_tls_get (glwthread_tls_key_t key);
+extern int glwthread_tls_set (glwthread_tls_key_t key, void *value);
+extern int glwthread_tls_key_delete (glwthread_tls_key_t key);
+extern void glwthread_tls_process_destructors (void);
+#define GLWTHREAD_DESTRUCTOR_ITERATIONS 4
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WINDOWS_TLS_H */
diff --git a/src/gl/tests/zerosize-ptr.h b/src/gl/tests/zerosize-ptr.h
new file mode 100644
index 0000000..bfeff50
--- /dev/null
+++ b/src/gl/tests/zerosize-ptr.h
@@ -0,0 +1,82 @@
+/* Return a pointer to a zero-size object in memory.
+   Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* ISO C 99 does not allow memcmp(), memchr() etc. to be invoked with a NULL
+   argument.  Therefore this file produces a non-NULL pointer which cannot
+   be dereferenced, if possible.  */
+
+/* On Android, when targeting Android 4.4 or older with a GCC toolchain,
+   prevent a compilation error
+     "error: call to 'mmap' declared with attribute error: mmap is not
+      available with _FILE_OFFSET_BITS=64 when using GCC until android-21.
+      Either raise your minSdkVersion, disable _FILE_OFFSET_BITS=64, or
+      switch to Clang."
+   The files that we access in this compilation unit are less than 2 GB
+   large.  */
+#if defined __ANDROID__
+# undef _FILE_OFFSET_BITS
+# undef __USE_FILE_OFFSET64
+#endif
+
+#include <stdlib.h>
+
+/* Test whether mmap() and mprotect() are available.
+   We don't use HAVE_MMAP, because AC_FUNC_MMAP would not define it on HP-UX.
+   HAVE_MPROTECT is not enough, because mingw does not have mmap() but has an
+   mprotect() function in libgcc.a.
+   And OS/2 kLIBC has <sys/mman.h> and mprotect(), but not mmap().  */
+#if HAVE_SYS_MMAN_H && HAVE_MPROTECT && !defined __KLIBC__
+# include <fcntl.h>
+# include <unistd.h>
+# include <sys/types.h>
+# include <sys/mman.h>
+/* Define MAP_FILE when it isn't otherwise.  */
+# ifndef MAP_FILE
+#  define MAP_FILE 0
+# endif
+#endif
+
+/* Return a pointer to a zero-size object in memory (that is, actually, a
+   pointer to a page boundary where the previous page is readable and writable
+   and the next page is neither readable not writable), if possible.
+   Return NULL otherwise.  */
+
+static void *
+zerosize_ptr (void)
+{
+/* Use mmap and mprotect when they exist.  Don't test HAVE_MMAP, because it is
+   not defined on HP-UX 11 (since it does not support MAP_FIXED).  */
+#if HAVE_SYS_MMAN_H && HAVE_MPROTECT && !defined __KLIBC__
+# if HAVE_MAP_ANONYMOUS
+  const int flags = MAP_ANONYMOUS | MAP_PRIVATE;
+  const int fd = -1;
+# else /* !HAVE_MAP_ANONYMOUS */
+  const int flags = MAP_FILE | MAP_PRIVATE;
+  int fd = open ("/dev/zero", O_RDONLY, 0666);
+  if (fd >= 0)
+# endif
+    {
+      int pagesize = getpagesize ();
+      char *two_pages =
+        (char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE,
+                       flags, fd, 0);
+      if (two_pages != (char *)(-1)
+          && mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0)
+        return two_pages + pagesize;
+    }
+#endif
+  return NULL;
+}
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-28 07:33:12 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-28 07:33:12 +0000
commit	36082a2fe36ecd800d784ae44c14f1f18c66a7e9 (patch)
tree	6c68e0c0097987aff85a01dabddd34b862309a7c /src/gl/tests
parent	Initial commit. (diff)
download	gnutls28-upstream.tar.xz gnutls28-upstream.zip