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    1 # gettext.m4 serial 37 (gettext-0.14.4)
    2 dnl Copyright (C) 1995-2005 Free Software Foundation, Inc.
    3 dnl This file is free software; the Free Software Foundation
    4 dnl gives unlimited permission to copy and/or distribute it,
    5 dnl with or without modifications, as long as this notice is preserved.
    6 dnl
    7 dnl This file can can be used in projects which are not available under
    8 dnl the GNU General Public License or the GNU Library General Public
    9 dnl License but which still want to provide support for the GNU gettext
   10 dnl functionality.
   11 dnl Please note that the actual code of the GNU gettext library is covered
   12 dnl by the GNU Library General Public License, and the rest of the GNU
   13 dnl gettext package package is covered by the GNU General Public License.
   14 dnl They are *not* in the public domain.
   15 
   16 dnl Authors:
   17 dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
   18 dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2003.
   19 
   20 dnl Macro to add for using GNU gettext.
   21 
   22 dnl Usage: AM_GNU_GETTEXT([INTLSYMBOL], [NEEDSYMBOL], [INTLDIR]).
   23 dnl INTLSYMBOL can be one of 'external', 'no-libtool', 'use-libtool'. The
   24 dnl    default (if it is not specified or empty) is 'no-libtool'.
   25 dnl    INTLSYMBOL should be 'external' for packages with no intl directory,
   26 dnl    and 'no-libtool' or 'use-libtool' for packages with an intl directory.
   27 dnl    If INTLSYMBOL is 'use-libtool', then a libtool library
   28 dnl    $(top_builddir)/intl/libintl.la will be created (shared and/or static,
   29 dnl    depending on --{enable,disable}-{shared,static} and on the presence of
   30 dnl    AM-DISABLE-SHARED). If INTLSYMBOL is 'no-libtool', a static library
   31 dnl    $(top_builddir)/intl/libintl.a will be created.
   32 dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
   33 dnl    implementations (in libc or libintl) without the ngettext() function
   34 dnl    will be ignored.  If NEEDSYMBOL is specified and is
   35 dnl    'need-formatstring-macros', then GNU gettext implementations that don't
   36 dnl    support the ISO C 99 <inttypes.h> formatstring macros will be ignored.
   37 dnl INTLDIR is used to find the intl libraries.  If empty,
   38 dnl    the value `$(top_builddir)/intl/' is used.
   39 dnl
   40 dnl The result of the configuration is one of three cases:
   41 dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled
   42 dnl    and used.
   43 dnl    Catalog format: GNU --> install in $(datadir)
   44 dnl    Catalog extension: .mo after installation, .gmo in source tree
   45 dnl 2) GNU gettext has been found in the system's C library.
   46 dnl    Catalog format: GNU --> install in $(datadir)
   47 dnl    Catalog extension: .mo after installation, .gmo in source tree
   48 dnl 3) No internationalization, always use English msgid.
   49 dnl    Catalog format: none
   50 dnl    Catalog extension: none
   51 dnl If INTLSYMBOL is 'external', only cases 2 and 3 can occur.
   52 dnl The use of .gmo is historical (it was needed to avoid overwriting the
   53 dnl GNU format catalogs when building on a platform with an X/Open gettext),
   54 dnl but we keep it in order not to force irrelevant filename changes on the
   55 dnl maintainers.
   56 dnl
   57 AC_DEFUN([AM_GNU_GETTEXT],
   58 [
   59   dnl Argument checking.
   60   ifelse([$1], [], , [ifelse([$1], [external], , [ifelse([$1], [no-libtool], , [ifelse([$1], [use-libtool], ,
   61     [errprint([ERROR: invalid first argument to AM_GNU_GETTEXT
   62 ])])])])])
   63   ifelse([$2], [], , [ifelse([$2], [need-ngettext], , [ifelse([$2], [need-formatstring-macros], ,
   64     [errprint([ERROR: invalid second argument to AM_GNU_GETTEXT
   65 ])])])])
   66   define([gt_included_intl], ifelse([$1], [external], [no], [yes]))
   67   define([gt_libtool_suffix_prefix], ifelse([$1], [use-libtool], [l], []))
   68 
   69   AC_REQUIRE([AM_PO_SUBDIRS])dnl
   70   ifelse(gt_included_intl, yes, [
   71     AC_REQUIRE([AM_INTL_SUBDIR])dnl
   72   ])
   73 
   74   dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
   75   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
   76   AC_REQUIRE([AC_LIB_RPATH])
   77 
   78   dnl Sometimes libintl requires libiconv, so first search for libiconv.
   79   dnl Ideally we would do this search only after the
   80   dnl      if test "$USE_NLS" = "yes"; then
   81   dnl        if test "$gt_cv_func_gnugettext_libc" != "yes"; then
   82   dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT
   83   dnl the configure script would need to contain the same shell code
   84   dnl again, outside any 'if'. There are two solutions:
   85   dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
   86   dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.
   87   dnl Since AC_PROVIDE_IFELSE is only in autoconf >= 2.52 and not
   88   dnl documented, we avoid it.
   89   ifelse(gt_included_intl, yes, , [
   90     AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
   91   ])
   92 
   93   dnl Sometimes, on MacOS X, libintl requires linking with CoreFoundation.
   94   gt_INTL_MACOSX
   95 
   96   dnl Set USE_NLS.
   97   AM_NLS
   98 
   99   ifelse(gt_included_intl, yes, [
  100     BUILD_INCLUDED_LIBINTL=no
  101     USE_INCLUDED_LIBINTL=no
  102   ])
  103   LIBINTL=
  104   LTLIBINTL=
  105   POSUB=
  106 
  107   dnl If we use NLS figure out what method
  108   if test "$USE_NLS" = "yes"; then
  109     gt_use_preinstalled_gnugettext=no
  110     ifelse(gt_included_intl, yes, [
  111       AC_MSG_CHECKING([whether included gettext is requested])
  112       AC_ARG_WITH(included-gettext,
  113         [  --with-included-gettext use the GNU gettext library included here],
  114         nls_cv_force_use_gnu_gettext=$withval,
  115         nls_cv_force_use_gnu_gettext=no)
  116       AC_MSG_RESULT($nls_cv_force_use_gnu_gettext)
  117 
  118       nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
  119       if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
  120     ])
  121         dnl User does not insist on using GNU NLS library.  Figure out what
  122         dnl to use.  If GNU gettext is available we use this.  Else we have
  123         dnl to fall back to GNU NLS library.
  124 
  125         dnl Add a version number to the cache macros.
  126         define([gt_api_version], ifelse([$2], [need-formatstring-macros], 3, ifelse([$2], [need-ngettext], 2, 1)))
  127         define([gt_cv_func_gnugettext_libc], [gt_cv_func_gnugettext]gt_api_version[_libc])
  128         define([gt_cv_func_gnugettext_libintl], [gt_cv_func_gnugettext]gt_api_version[_libintl])
  129 
  130         AC_CACHE_CHECK([for GNU gettext in libc], gt_cv_func_gnugettext_libc,
  131          [AC_TRY_LINK([#include <libintl.h>
  132 ]ifelse([$2], [need-formatstring-macros],
  133 [#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
  134 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
  135 #endif
  136 changequote(,)dnl
  137 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
  138 changequote([,])dnl
  139 ], [])[extern int _nl_msg_cat_cntr;
  140 extern int *_nl_domain_bindings;],
  141             [bindtextdomain ("", "");
  142 return * gettext ("")]ifelse([$2], [need-ngettext], [ + * ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr + *_nl_domain_bindings],
  143             gt_cv_func_gnugettext_libc=yes,
  144             gt_cv_func_gnugettext_libc=no)])
  145 
  146         if test "$gt_cv_func_gnugettext_libc" != "yes"; then
  147           dnl Sometimes libintl requires libiconv, so first search for libiconv.
  148           ifelse(gt_included_intl, yes, , [
  149             AM_ICONV_LINK
  150           ])
  151           dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
  152           dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
  153           dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
  154           dnl even if libiconv doesn't exist.
  155           AC_LIB_LINKFLAGS_BODY([intl])
  156           AC_CACHE_CHECK([for GNU gettext in libintl],
  157             gt_cv_func_gnugettext_libintl,
  158            [gt_save_CPPFLAGS="$CPPFLAGS"
  159             CPPFLAGS="$CPPFLAGS $INCINTL"
  160             gt_save_LIBS="$LIBS"
  161             LIBS="$LIBS $LIBINTL"
  162             dnl Now see whether libintl exists and does not depend on libiconv.
  163             AC_TRY_LINK([#include <libintl.h>
  164 ]ifelse([$2], [need-formatstring-macros],
  165 [#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
  166 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
  167 #endif
  168 changequote(,)dnl
  169 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
  170 changequote([,])dnl
  171 ], [])[extern int _nl_msg_cat_cntr;
  172 extern
  173 #ifdef __cplusplus
  174 "C"
  175 #endif
  176 const char *_nl_expand_alias (const char *);],
  177               [bindtextdomain ("", "");
  178 return * gettext ("")]ifelse([$2], [need-ngettext], [ + * ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
  179               gt_cv_func_gnugettext_libintl=yes,
  180               gt_cv_func_gnugettext_libintl=no)
  181             dnl Now see whether libintl exists and depends on libiconv.
  182             if test "$gt_cv_func_gnugettext_libintl" != yes && test -n "$LIBICONV"; then
  183               LIBS="$LIBS $LIBICONV"
  184               AC_TRY_LINK([#include <libintl.h>
  185 ]ifelse([$2], [need-formatstring-macros],
  186 [#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
  187 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
  188 #endif
  189 changequote(,)dnl
  190 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
  191 changequote([,])dnl
  192 ], [])[extern int _nl_msg_cat_cntr;
  193 extern
  194 #ifdef __cplusplus
  195 "C"
  196 #endif
  197 const char *_nl_expand_alias (const char *);],
  198                 [bindtextdomain ("", "");
  199 return * gettext ("")]ifelse([$2], [need-ngettext], [ + * ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
  200                [LIBINTL="$LIBINTL $LIBICONV"
  201                 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
  202                 gt_cv_func_gnugettext_libintl=yes
  203                ])
  204             fi
  205             CPPFLAGS="$gt_save_CPPFLAGS"
  206             LIBS="$gt_save_LIBS"])
  207         fi
  208 
  209         dnl If an already present or preinstalled GNU gettext() is found,
  210         dnl use it.  But if this macro is used in GNU gettext, and GNU
  211         dnl gettext is already preinstalled in libintl, we update this
  212         dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
  213         if test "$gt_cv_func_gnugettext_libc" = "yes" \
  214            || { test "$gt_cv_func_gnugettext_libintl" = "yes" \
  215                 && test "$PACKAGE" != gettext-runtime \
  216                 && test "$PACKAGE" != gettext-tools; }; then
  217           gt_use_preinstalled_gnugettext=yes
  218         else
  219           dnl Reset the values set by searching for libintl.
  220           LIBINTL=
  221           LTLIBINTL=
  222           INCINTL=
  223         fi
  224 
  225     ifelse(gt_included_intl, yes, [
  226         if test "$gt_use_preinstalled_gnugettext" != "yes"; then
  227           dnl GNU gettext is not found in the C library.
  228           dnl Fall back on included GNU gettext library.
  229           nls_cv_use_gnu_gettext=yes
  230         fi
  231       fi
  232 
  233       if test "$nls_cv_use_gnu_gettext" = "yes"; then
  234         dnl Mark actions used to generate GNU NLS library.
  235         BUILD_INCLUDED_LIBINTL=yes
  236         USE_INCLUDED_LIBINTL=yes
  237         LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV"
  238         LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV"
  239         LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
  240       fi
  241 
  242       CATOBJEXT=
  243       if test "$gt_use_preinstalled_gnugettext" = "yes" \
  244          || test "$nls_cv_use_gnu_gettext" = "yes"; then
  245         dnl Mark actions to use GNU gettext tools.
  246         CATOBJEXT=.gmo
  247       fi
  248     ])
  249 
  250     if test -n "$INTL_MACOSX_LIBS"; then
  251       if test "$gt_use_preinstalled_gnugettext" = "yes" \
  252          || test "$nls_cv_use_gnu_gettext" = "yes"; then
  253         dnl Some extra flags are needed during linking.
  254         LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
  255         LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
  256       fi
  257     fi
  258 
  259     if test "$gt_use_preinstalled_gnugettext" = "yes" \
  260        || test "$nls_cv_use_gnu_gettext" = "yes"; then
  261       AC_DEFINE(ENABLE_NLS, 1,
  262         [Define to 1 if translation of program messages to the user's native language
  263    is requested.])
  264     else
  265       USE_NLS=no
  266     fi
  267   fi
  268 
  269   AC_MSG_CHECKING([whether to use NLS])
  270   AC_MSG_RESULT([$USE_NLS])
  271   if test "$USE_NLS" = "yes"; then
  272     AC_MSG_CHECKING([where the gettext function comes from])
  273     if test "$gt_use_preinstalled_gnugettext" = "yes"; then
  274       if test "$gt_cv_func_gnugettext_libintl" = "yes"; then
  275         gt_source="external libintl"
  276       else
  277         gt_source="libc"
  278       fi
  279     else
  280       gt_source="included intl directory"
  281     fi
  282     AC_MSG_RESULT([$gt_source])
  283   fi
  284 
  285   if test "$USE_NLS" = "yes"; then
  286 
  287     if test "$gt_use_preinstalled_gnugettext" = "yes"; then
  288       if test "$gt_cv_func_gnugettext_libintl" = "yes"; then
  289         AC_MSG_CHECKING([how to link with libintl])
  290         AC_MSG_RESULT([$LIBINTL])
  291         AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
  292       fi
  293 
  294       dnl For backward compatibility. Some packages may be using this.
  295       AC_DEFINE(HAVE_GETTEXT, 1,
  296        [Define if the GNU gettext() function is already present or preinstalled.])
  297       AC_DEFINE(HAVE_DCGETTEXT, 1,
  298        [Define if the GNU dcgettext() function is already present or preinstalled.])
  299     fi
  300 
  301     dnl We need to process the po/ directory.
  302     POSUB=po
  303   fi
  304 
  305   ifelse(gt_included_intl, yes, [
  306     dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
  307     dnl to 'yes' because some of the testsuite requires it.
  308     if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
  309       BUILD_INCLUDED_LIBINTL=yes
  310     fi
  311 
  312     dnl Make all variables we use known to autoconf.
  313     AC_SUBST(BUILD_INCLUDED_LIBINTL)
  314     AC_SUBST(USE_INCLUDED_LIBINTL)
  315     AC_SUBST(CATOBJEXT)
  316 
  317     dnl For backward compatibility. Some configure.ins may be using this.
  318     nls_cv_header_intl=
  319     nls_cv_header_libgt=
  320 
  321     dnl For backward compatibility. Some Makefiles may be using this.
  322     DATADIRNAME=share
  323     AC_SUBST(DATADIRNAME)
  324 
  325     dnl For backward compatibility. Some Makefiles may be using this.
  326     INSTOBJEXT=.mo
  327     AC_SUBST(INSTOBJEXT)
  328 
  329     dnl For backward compatibility. Some Makefiles may be using this.
  330     GENCAT=gencat
  331     AC_SUBST(GENCAT)
  332 
  333     dnl For backward compatibility. Some Makefiles may be using this.
  334     INTLOBJS=
  335     if test "$USE_INCLUDED_LIBINTL" = yes; then
  336       INTLOBJS="\$(GETTOBJS)"
  337     fi
  338     AC_SUBST(INTLOBJS)
  339 
  340     dnl Enable libtool support if the surrounding package wishes it.
  341     INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
  342     AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
  343   ])
  344 
  345   dnl For backward compatibility. Some Makefiles may be using this.
  346   INTLLIBS="$LIBINTL"
  347   AC_SUBST(INTLLIBS)
  348 
  349   dnl Make all documented variables known to autoconf.
  350   AC_SUBST(LIBINTL)
  351   AC_SUBST(LTLIBINTL)
  352   AC_SUBST(POSUB)
  353 ])
  354 
  355 
  356 dnl Checks for all prerequisites of the intl subdirectory,
  357 dnl except for INTL_LIBTOOL_SUFFIX_PREFIX (and possibly LIBTOOL), INTLOBJS,
  358 dnl            USE_INCLUDED_LIBINTL, BUILD_INCLUDED_LIBINTL.
  359 AC_DEFUN([AM_INTL_SUBDIR],
  360 [
  361   AC_REQUIRE([AC_PROG_INSTALL])dnl
  362   AC_REQUIRE([AM_MKINSTALLDIRS])dnl
  363   AC_REQUIRE([AC_PROG_CC])dnl
  364   AC_REQUIRE([AC_CANONICAL_HOST])dnl
  365   AC_REQUIRE([gt_GLIBC2])dnl
  366   AC_REQUIRE([AC_PROG_RANLIB])dnl
  367   AC_REQUIRE([AC_ISC_POSIX])dnl
  368   AC_REQUIRE([AC_HEADER_STDC])dnl
  369   AC_REQUIRE([AC_C_CONST])dnl
  370   AC_REQUIRE([bh_C_SIGNED])dnl
  371   AC_REQUIRE([AC_C_INLINE])dnl
  372   AC_REQUIRE([AC_TYPE_OFF_T])dnl
  373   AC_REQUIRE([AC_TYPE_SIZE_T])dnl
  374   AC_REQUIRE([gl_AC_TYPE_LONG_LONG])dnl
  375   AC_REQUIRE([gt_TYPE_LONGDOUBLE])dnl
  376   AC_REQUIRE([gt_TYPE_WCHAR_T])dnl
  377   AC_REQUIRE([gt_TYPE_WINT_T])dnl
  378   AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
  379   AC_REQUIRE([gl_AC_HEADER_STDINT_H])
  380   AC_REQUIRE([gt_TYPE_INTMAX_T])
  381   AC_REQUIRE([gt_PRINTF_POSIX])
  382   AC_REQUIRE([AC_FUNC_ALLOCA])dnl
  383   AC_REQUIRE([AC_FUNC_MMAP])dnl
  384   AC_REQUIRE([gl_GLIBC21])dnl
  385   AC_REQUIRE([gt_INTDIV0])dnl
  386   AC_REQUIRE([gl_AC_TYPE_UINTMAX_T])dnl
  387   AC_REQUIRE([gt_HEADER_INTTYPES_H])dnl
  388   AC_REQUIRE([gt_INTTYPES_PRI])dnl
  389   AC_REQUIRE([gl_XSIZE])dnl
  390   AC_REQUIRE([gt_INTL_MACOSX])dnl
  391 
  392   AC_CHECK_TYPE([ptrdiff_t], ,
  393     [AC_DEFINE([ptrdiff_t], [long],
  394        [Define as the type of the result of subtracting two pointers, if the system doesn't define it.])
  395     ])
  396   AC_CHECK_HEADERS([argz.h limits.h locale.h nl_types.h malloc.h stddef.h \
  397 stdlib.h string.h unistd.h sys/param.h])
  398   AC_CHECK_FUNCS([asprintf fwprintf getcwd getegid geteuid getgid getuid \
  399 mempcpy munmap putenv setenv setlocale snprintf stpcpy strcasecmp strdup \
  400 strtoul tsearch wcslen __argz_count __argz_stringify __argz_next \
  401 __fsetlocking])
  402 
  403   dnl Use the _snprintf function only if it is declared (because on NetBSD it
  404   dnl is defined as a weak alias of snprintf; we prefer to use the latter).
  405   gt_CHECK_DECL(_snprintf, [#include <stdio.h>])
  406   gt_CHECK_DECL(_snwprintf, [#include <stdio.h>])
  407 
  408   dnl Use the *_unlocked functions only if they are declared.
  409   dnl (because some of them were defined without being declared in Solaris
  410   dnl 2.5.1 but were removed in Solaris 2.6, whereas we want binaries built
  411   dnl on Solaris 2.5.1 to run on Solaris 2.6).
  412   dnl Don't use AC_CHECK_DECLS because it isn't supported in autoconf-2.13.
  413   gt_CHECK_DECL(feof_unlocked, [#include <stdio.h>])
  414   gt_CHECK_DECL(fgets_unlocked, [#include <stdio.h>])
  415   gt_CHECK_DECL(getc_unlocked, [#include <stdio.h>])
  416 
  417   case $gt_cv_func_printf_posix in
  418     *yes) HAVE_POSIX_PRINTF=1 ;;
  419     *) HAVE_POSIX_PRINTF=0 ;;
  420   esac
  421   AC_SUBST([HAVE_POSIX_PRINTF])
  422   if test "$ac_cv_func_asprintf" = yes; then
  423     HAVE_ASPRINTF=1
  424   else
  425     HAVE_ASPRINTF=0
  426   fi
  427   AC_SUBST([HAVE_ASPRINTF])
  428   if test "$ac_cv_func_snprintf" = yes; then
  429     HAVE_SNPRINTF=1
  430   else
  431     HAVE_SNPRINTF=0
  432   fi
  433   AC_SUBST([HAVE_SNPRINTF])
  434   if test "$ac_cv_func_wprintf" = yes; then
  435     HAVE_WPRINTF=1
  436   else
  437     HAVE_WPRINTF=0
  438   fi
  439   AC_SUBST([HAVE_WPRINTF])
  440 
  441   AM_ICONV
  442   AM_LANGINFO_CODESET
  443   if test $ac_cv_header_locale_h = yes; then
  444     gt_LC_MESSAGES
  445   fi
  446 
  447   if test -n "$INTL_MACOSX_LIBS"; then
  448     CPPFLAGS="$CPPFLAGS -I/System/Library/Frameworks/CoreFoundation.framework/Headers"
  449   fi
  450 
  451   dnl intl/plural.c is generated from intl/plural.y. It requires bison,
  452   dnl because plural.y uses bison specific features. It requires at least
  453   dnl bison-1.26 because earlier versions generate a plural.c that doesn't
  454   dnl compile.
  455   dnl bison is only needed for the maintainer (who touches plural.y). But in
  456   dnl order to avoid separate Makefiles or --enable-maintainer-mode, we put
  457   dnl the rule in general Makefile. Now, some people carelessly touch the
  458   dnl files or have a broken "make" program, hence the plural.c rule will
  459   dnl sometimes fire. To avoid an error, defines BISON to ":" if it is not
  460   dnl present or too old.
  461   AC_CHECK_PROGS([INTLBISON], [bison])
  462   if test -z "$INTLBISON"; then
  463     ac_verc_fail=yes
  464   else
  465     dnl Found it, now check the version.
  466     AC_MSG_CHECKING([version of bison])
  467 changequote(<<,>>)dnl
  468     ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
  469     case $ac_prog_version in
  470       '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
  471       1.2[6-9]* | 1.[3-9][0-9]* | [2-9].*)
  472 changequote([,])dnl
  473          ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
  474       *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
  475     esac
  476     AC_MSG_RESULT([$ac_prog_version])
  477   fi
  478   if test $ac_verc_fail = yes; then
  479     INTLBISON=:
  480   fi
  481 ])
  482 
  483 
  484 dnl Checks for special options needed on MacOS X.
  485 dnl Defines INTL_MACOSX_LIBS.
  486 AC_DEFUN([gt_INTL_MACOSX],
  487 [
  488   dnl Check for API introduced in MacOS X 10.2.
  489   AC_CACHE_CHECK([for CFPreferencesCopyAppValue],
  490     gt_cv_func_CFPreferencesCopyAppValue,
  491     [gt_save_CPPFLAGS="$CPPFLAGS"
  492      CPPFLAGS="$CPPFLAGS -I/System/Library/Frameworks/CoreFoundation.framework/Headers"
  493      gt_save_LIBS="$LIBS"
  494      LIBS="$LIBS -framework CoreFoundation"
  495      AC_TRY_LINK([#include <CFPreferences.h>],
  496        [CFPreferencesCopyAppValue(NULL, NULL)],
  497        [gt_cv_func_CFPreferencesCopyAppValue=yes],
  498        [gt_cv_func_CFPreferencesCopyAppValue=no])
  499      CPPFLAGS="$gt_save_CPPFLAGS"
  500      LIBS="$gt_save_LIBS"])
  501   if test $gt_cv_func_CFPreferencesCopyAppValue = yes; then
  502     AC_DEFINE([HAVE_CFPREFERENCESCOPYAPPVALUE], 1,
  503       [Define to 1 if you have the MacOS X function CFPreferencesCopyAppValue in the CoreFoundation framework.])
  504   fi
  505   dnl Check for API introduced in MacOS X 10.3.
  506   AC_CACHE_CHECK([for CFLocaleCopyCurrent], gt_cv_func_CFLocaleCopyCurrent,
  507     [gt_save_CPPFLAGS="$CPPFLAGS"
  508      CPPFLAGS="$CPPFLAGS -I/System/Library/Frameworks/CoreFoundation.framework/Headers"
  509      gt_save_LIBS="$LIBS"
  510      LIBS="$LIBS -framework CoreFoundation"
  511      AC_TRY_LINK([#include <CFLocale.h>], [CFLocaleCopyCurrent();],
  512        [gt_cv_func_CFLocaleCopyCurrent=yes],
  513        [gt_cv_func_CFLocaleCopyCurrent=no])
  514      CPPFLAGS="$gt_save_CPPFLAGS"
  515      LIBS="$gt_save_LIBS"])
  516   if test $gt_cv_func_CFLocaleCopyCurrent = yes; then
  517     AC_DEFINE([HAVE_CFLOCALECOPYCURRENT], 1,
  518       [Define to 1 if you have the MacOS X function CFLocaleCopyCurrent in the CoreFoundation framework.])
  519   fi
  520   INTL_MACOSX_LIBS=
  521   if test $gt_cv_func_CFPreferencesCopyAppValue = yes || test $gt_cv_func_CFLocaleCopyCurrent = yes; then
  522     INTL_MACOSX_LIBS="-Wl,-framework -Wl,CoreFoundation"
  523   fi
  524   AC_SUBST([INTL_MACOSX_LIBS])
  525 ])
  526 
  527 
  528 dnl gt_CHECK_DECL(FUNC, INCLUDES)
  529 dnl Check whether a function is declared.
  530 AC_DEFUN([gt_CHECK_DECL],
  531 [
  532   AC_CACHE_CHECK([whether $1 is declared], ac_cv_have_decl_$1,
  533     [AC_TRY_COMPILE([$2], [
  534 #ifndef $1
  535   char *p = (char *) $1;
  536 #endif
  537 ], ac_cv_have_decl_$1=yes, ac_cv_have_decl_$1=no)])
  538   if test $ac_cv_have_decl_$1 = yes; then
  539     gt_value=1
  540   else
  541     gt_value=0
  542   fi
  543   AC_DEFINE_UNQUOTED([HAVE_DECL_]translit($1, [a-z], [A-Z]), [$gt_value],
  544     [Define to 1 if you have the declaration of `$1', and to 0 if you don't.])
  545 ])
  546 
  547 
  548 dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
  549 AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])