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Diffstat (limited to 'gl/m4/libunistring-base.m4')
| -rw-r--r-- | gl/m4/libunistring-base.m4 | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/gl/m4/libunistring-base.m4 b/gl/m4/libunistring-base.m4 new file mode 100644 index 0000000..7c3f65e --- /dev/null +++ b/gl/m4/libunistring-base.m4 @@ -0,0 +1,196 @@ +# libunistring-base.m4 serial 8 +dnl Copyright (C) 2010-2024 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl From Paolo Bonzini and Bruno Haible. + +dnl gl_LIBUNISTRING_MODULE([VERSION], [Module]) +dnl Declares that the source files of Module should be compiled, unless we +dnl are linking with libunistring and its version is >= the given VERSION. +dnl Defines an automake conditional LIBUNISTRING_COMPILE_$MODULE that is +dnl true if the source files of Module should be compiled. +dnl This macro is to be used for public libunistring API, not for +dnl undocumented API. +dnl +dnl You have to bump the VERSION argument to the next projected version +dnl number each time you make a change that affects the behaviour of the +dnl functions defined in Module (even if the sources of Module itself do not +dnl change). +dnl +dnl This macro invocation must not occur in macros that are AC_REQUIREd. + +AC_DEFUN([gl_LIBUNISTRING_MODULE], +[ + AC_REQUIRE([gl_LIBUNISTRING_LIB_PREPARE]) + dnl Use the variables HAVE_LIBUNISTRING, LIBUNISTRING_VERSION from + dnl gl_LIBUNISTRING_CORE if that macro has been run. + gl_CONDITIONAL(AS_TR_CPP([LIBUNISTRING_COMPILE_$2]), + [gl_LIBUNISTRING_VERSION_CMP([$1])]) +]) + +dnl gl_LIBUNISTRING_MODULE_WITH_VARIABLE([VERSION], [Module]) +dnl is like gl_LIBUNISTRING_MODULE([VERSION], [Module]), except that it also +dnl defines an AC_SUBSTed autoconf variable GNULIB_$MODULE_DLL_VARIABLE. +dnl What's the expansion of this autoconf variable? +dnl - When building libunistring, it expands to LIBUNISTRING_DLL_VARIABLE. +dnl (This is necessary because this token must be present in the .h files +dnl when the .h files get installed.) +dnl - When building gnulib or application code it expands to +dnl - LIBUNISTRING_DLL_VARIABLE by default, +dnl - empty if the automake conditional LIBUNISTRING_COMPILE_$MODULE +dnl evaluates to true. +dnl (This is necessary because when the conditional evaluates to false, +dnl the application code expects to use the declared variable from the +dnl installed libunistring; it's in this case that the +dnl LIBUNISTRING_DLL_VARIABLE macro from the installed +dnl <unistring/woe32dll.h> must be used.) +dnl +dnl This macro invocation must not occur in macros that are AC_REQUIREd. + +AC_DEFUN([gl_LIBUNISTRING_MODULE_WITH_VARIABLE], +[ + gl_LIBUNISTRING_MODULE([$1], [$2]) + m4_ifndef([gl_IN_LIBUNISTRING], + [if test -z "${AS_TR_CPP([LIBUNISTRING_COMPILE_$2])_TRUE}"; then + GL_MODULE_INDICATOR_PREFIX[]_GNULIB_[]AS_TR_CPP([$2_DLL_VARIABLE])= + fi + ]) +]) + +dnl gl_LIBUNISTRING_LIBHEADER([VERSION], [HeaderFile]) +dnl Declares that HeaderFile should be created, unless we are linking +dnl with libunistring and its version is >= the given VERSION. +dnl HeaderFile should be relative to the lib directory and end in '.h'. +dnl Prepares for substituting LIBUNISTRING_HEADERFILE (to HeaderFile or empty). +dnl +dnl When we are linking with the already installed libunistring and its version +dnl is < VERSION, we create HeaderFile here, because we may compile functions +dnl (via gl_LIBUNISTRING_MODULE above) that are not contained in the installed +dnl version. +dnl When we are linking with the already installed libunistring and its version +dnl is > VERSION, we don't create HeaderFile here: it could cause compilation +dnl errors in other libunistring header files if some types are missing. +dnl +dnl You have to bump the VERSION argument to the next projected version +dnl number each time you make a non-comment change to the HeaderFile. + +AC_DEFUN([gl_LIBUNISTRING_LIBHEADER], +[ + AC_REQUIRE([gl_LIBUNISTRING_LIB_PREPARE]) + dnl Use the variables HAVE_LIBUNISTRING, LIBUNISTRING_VERSION from + dnl gl_LIBUNISTRING_CORE if that macro has been run. + if gl_LIBUNISTRING_VERSION_CMP([$1]); then + dnl It is OK to use a .h file in lib/ from within tests/, but not vice + dnl versa. + if test -z "$LIBUNISTRING_[]AS_TR_CPP([$2])"; then + LIBUNISTRING_[]AS_TR_CPP([$2])="${gl_source_base_prefix}$2" + fi + else + LIBUNISTRING_[]AS_TR_CPP([$2])= + fi + AC_SUBST([LIBUNISTRING_]AS_TR_CPP([$2])) +]) + +dnl Miscellaneous preparations/initializations. + +AC_DEFUN([gl_LIBUNISTRING_LIB_PREPARE], +[ + dnl Ensure that HAVE_LIBUNISTRING is fully determined at this point. + m4_ifdef([gl_LIBUNISTRING], [AC_REQUIRE([gl_LIBUNISTRING])]) + + AC_REQUIRE([AC_PROG_AWK]) + +dnl Sed expressions to extract the parts of a version number. +changequote(,) +gl_libunistring_sed_extract_major='/^[0-9]/{s/^\([0-9]*\).*/\1/p;q;} +i\ +0 +q +' +gl_libunistring_sed_extract_minor='/^[0-9][0-9]*[.][0-9]/{s/^[0-9]*[.]\([0-9]*\).*/\1/p;q;} +i\ +0 +q +' +gl_libunistring_sed_extract_subminor='/^[0-9][0-9]*[.][0-9][0-9]*[.][0-9]/{s/^[0-9]*[.][0-9]*[.]\([0-9]*\).*/\1/p;q;} +i\ +0 +q +' +changequote([,]) + + if test "$HAVE_LIBUNISTRING" = yes; then + LIBUNISTRING_VERSION_MAJOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_major"` + LIBUNISTRING_VERSION_MINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_minor"` + LIBUNISTRING_VERSION_SUBMINOR=`echo "$LIBUNISTRING_VERSION" | sed -n -e "$gl_libunistring_sed_extract_subminor"` + fi + + dnl Determine whether <unistring/woe32dll.h> from an installed libunistring + dnl is available. + m4_ifdef([gl_IN_LIBUNISTRING], + [dnl In libunistring, all .h files that declare variables need to + dnl #include <unistring/woe32dll.h>. This references the file + dnl unistring/woe32dll.h in libunistring. + HAVE_UNISTRING_WOE32DLL_H=1 + ], + [dnl In gnulib or in applications, we need a #include <unistring/woe32dll.h> + dnl if and only if an installed libunistring is available. + if test "$HAVE_LIBUNISTRING" = yes; then + AC_CHECK_HEADERS([unistring/woe32dll.h], + [HAVE_UNISTRING_WOE32DLL_H=1], + [HAVE_UNISTRING_WOE32DLL_H=0]) + else + HAVE_UNISTRING_WOE32DLL_H=0 + fi + ]) + AC_SUBST([HAVE_UNISTRING_WOE32DLL_H]) +]) + +dnl gl_LIBUNISTRING_VERSION_CMP([VERSION]) +dnl Expands to a shell statement that evaluates to true if LIBUNISTRING_VERSION +dnl is less than the VERSION argument. +AC_DEFUN([gl_LIBUNISTRING_VERSION_CMP], +[ { test "$HAVE_LIBUNISTRING" != yes \ + || { + dnl AS_LITERAL_IF exists and works fine since autoconf-2.59 at least. + AS_LITERAL_IF([$1], + [dnl This is the optimized variant, that assumes the argument is a literal: + m4_pushdef([requested_version_major], + [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^\([0-9]*\).*], [\1]), [])]) + m4_pushdef([requested_version_minor], + [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^[0-9]*[.]\([0-9]*\).*], [\1]), [$1])]) + m4_pushdef([requested_version_subminor], + [gl_LIBUNISTRING_ARG_OR_ZERO(m4_bpatsubst([$1], [^[0-9]*[.][0-9]*[.]\([0-9]*\).*], [\1]), [$1])]) + test $LIBUNISTRING_VERSION_MAJOR -lt requested_version_major \ + || { test $LIBUNISTRING_VERSION_MAJOR -eq requested_version_major \ + && { test $LIBUNISTRING_VERSION_MINOR -lt requested_version_minor \ + || { test $LIBUNISTRING_VERSION_MINOR -eq requested_version_minor \ + && test $LIBUNISTRING_VERSION_SUBMINOR -lt requested_version_subminor + } + } + } + m4_popdef([requested_version_subminor]) + m4_popdef([requested_version_minor]) + m4_popdef([requested_version_major]) + ], + [dnl This is the unoptimized variant: + requested_version_major=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_major"` + requested_version_minor=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_minor"` + requested_version_subminor=`echo '$1' | sed -n -e "$gl_libunistring_sed_extract_subminor"` + test $LIBUNISTRING_VERSION_MAJOR -lt $requested_version_major \ + || { test $LIBUNISTRING_VERSION_MAJOR -eq $requested_version_major \ + && { test $LIBUNISTRING_VERSION_MINOR -lt $requested_version_minor \ + || { test $LIBUNISTRING_VERSION_MINOR -eq $requested_version_minor \ + && test $LIBUNISTRING_VERSION_SUBMINOR -lt $requested_version_subminor + } + } + } + ]) + } + }]) + +dnl gl_LIBUNISTRING_ARG_OR_ZERO([ARG], [ORIG]) expands to ARG if it is not the +dnl same as ORIG, otherwise to 0. +m4_define([gl_LIBUNISTRING_ARG_OR_ZERO], [m4_if([$1], [$2], [0], [$1])]) |