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    1 # gettext.m4 serial 63 (gettext-0.18)
    2 dnl Copyright (C) 1995-2010 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>, 2000-2006, 2008-2010.
   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(ifelse([$1], [], [old])[]ifelse([$1], [no-libtool], [old]), [old],
   64     [AC_DIAGNOSE([obsolete], [Use of AM_GNU_GETTEXT without [external] argument is deprecated.])])
   65   ifelse([$2], [], , [ifelse([$2], [need-ngettext], , [ifelse([$2], [need-formatstring-macros], ,
   66     [errprint([ERROR: invalid second argument to AM_GNU_GETTEXT
   67 ])])])])
   68   define([gt_included_intl],
   69     ifelse([$1], [external],
   70       ifdef([AM_GNU_GETTEXT_][INTL_SUBDIR], [yes], [no]),
   71       [yes]))
   72   define([gt_libtool_suffix_prefix], ifelse([$1], [use-libtool], [l], []))
   73   gt_NEEDS_INIT
   74   AM_GNU_GETTEXT_NEED([$2])
   75 
   76   AC_REQUIRE([AM_PO_SUBDIRS])dnl
   77   ifelse(gt_included_intl, yes, [
   78     AC_REQUIRE([AM_INTL_SUBDIR])dnl
   79   ])
   80 
   81   dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
   82   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
   83   AC_REQUIRE([AC_LIB_RPATH])
   84 
   85   dnl Sometimes libintl requires libiconv, so first search for libiconv.
   86   dnl Ideally we would do this search only after the
   87   dnl      if test "$USE_NLS" = "yes"; then
   88   dnl        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
   89   dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT
   90   dnl the configure script would need to contain the same shell code
   91   dnl again, outside any 'if'. There are two solutions:
   92   dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
   93   dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.
   94   dnl Since AC_PROVIDE_IFELSE is only in autoconf >= 2.52 and not
   95   dnl documented, we avoid it.
   96   ifelse(gt_included_intl, yes, , [
   97     AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
   98   ])
   99 
  100   dnl Sometimes, on MacOS X, libintl requires linking with CoreFoundation.
  101   gt_INTL_MACOSX
  102 
  103   dnl Set USE_NLS.
  104   AC_REQUIRE([AM_NLS])
  105 
  106   ifelse(gt_included_intl, yes, [
  107     BUILD_INCLUDED_LIBINTL=no
  108     USE_INCLUDED_LIBINTL=no
  109   ])
  110   LIBINTL=
  111   LTLIBINTL=
  112   POSUB=
  113 
  114   dnl Add a version number to the cache macros.
  115   case " $gt_needs " in
  116     *" need-formatstring-macros "*) gt_api_version=3 ;;
  117     *" need-ngettext "*) gt_api_version=2 ;;
  118     *) gt_api_version=1 ;;
  119   esac
  120   gt_func_gnugettext_libc="gt_cv_func_gnugettext${gt_api_version}_libc"
  121   gt_func_gnugettext_libintl="gt_cv_func_gnugettext${gt_api_version}_libintl"
  122 
  123   dnl If we use NLS figure out what method
  124   if test "$USE_NLS" = "yes"; then
  125     gt_use_preinstalled_gnugettext=no
  126     ifelse(gt_included_intl, yes, [
  127       AC_MSG_CHECKING([whether included gettext is requested])
  128       AC_ARG_WITH([included-gettext],
  129         [  --with-included-gettext use the GNU gettext library included here],
  130         nls_cv_force_use_gnu_gettext=$withval,
  131         nls_cv_force_use_gnu_gettext=no)
  132       AC_MSG_RESULT([$nls_cv_force_use_gnu_gettext])
  133 
  134       nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
  135       if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
  136     ])
  137         dnl User does not insist on using GNU NLS library.  Figure out what
  138         dnl to use.  If GNU gettext is available we use this.  Else we have
  139         dnl to fall back to GNU NLS library.
  140 
  141         if test $gt_api_version -ge 3; then
  142           gt_revision_test_code='
  143 #ifndef __GNU_GETTEXT_SUPPORTED_REVISION
  144 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
  145 #endif
  146 changequote(,)dnl
  147 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
  148 changequote([,])dnl
  149 '
  150         else
  151           gt_revision_test_code=
  152         fi
  153         if test $gt_api_version -ge 2; then
  154           gt_expression_test_code=' + * ngettext ("", "", 0)'
  155         else
  156           gt_expression_test_code=
  157         fi
  158 
  159         AC_CACHE_CHECK([for GNU gettext in libc], [$gt_func_gnugettext_libc],
  160          [AC_TRY_LINK([#include <libintl.h>
  161 $gt_revision_test_code
  162 extern int _nl_msg_cat_cntr;
  163 extern int *_nl_domain_bindings;],
  164             [bindtextdomain ("", "");
  165 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_domain_bindings],
  166             [eval "$gt_func_gnugettext_libc=yes"],
  167             [eval "$gt_func_gnugettext_libc=no"])])
  168 
  169         if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
  170           dnl Sometimes libintl requires libiconv, so first search for libiconv.
  171           ifelse(gt_included_intl, yes, , [
  172             AM_ICONV_LINK
  173           ])
  174           dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
  175           dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
  176           dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
  177           dnl even if libiconv doesn't exist.
  178           AC_LIB_LINKFLAGS_BODY([intl])
  179           AC_CACHE_CHECK([for GNU gettext in libintl],
  180             [$gt_func_gnugettext_libintl],
  181            [gt_save_CPPFLAGS="$CPPFLAGS"
  182             CPPFLAGS="$CPPFLAGS $INCINTL"
  183             gt_save_LIBS="$LIBS"
  184             LIBS="$LIBS $LIBINTL"
  185             dnl Now see whether libintl exists and does not depend on libiconv.
  186             AC_TRY_LINK([#include <libintl.h>
  187 $gt_revision_test_code
  188 extern int _nl_msg_cat_cntr;
  189 extern
  190 #ifdef __cplusplus
  191 "C"
  192 #endif
  193 const char *_nl_expand_alias (const char *);],
  194               [bindtextdomain ("", "");
  195 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
  196               [eval "$gt_func_gnugettext_libintl=yes"],
  197               [eval "$gt_func_gnugettext_libintl=no"])
  198             dnl Now see whether libintl exists and depends on libiconv.
  199             if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then
  200               LIBS="$LIBS $LIBICONV"
  201               AC_TRY_LINK([#include <libintl.h>
  202 $gt_revision_test_code
  203 extern int _nl_msg_cat_cntr;
  204 extern
  205 #ifdef __cplusplus
  206 "C"
  207 #endif
  208 const char *_nl_expand_alias (const char *);],
  209                 [bindtextdomain ("", "");
  210 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
  211                [LIBINTL="$LIBINTL $LIBICONV"
  212                 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
  213                 eval "$gt_func_gnugettext_libintl=yes"
  214                ])
  215             fi
  216             CPPFLAGS="$gt_save_CPPFLAGS"
  217             LIBS="$gt_save_LIBS"])
  218         fi
  219 
  220         dnl If an already present or preinstalled GNU gettext() is found,
  221         dnl use it.  But if this macro is used in GNU gettext, and GNU
  222         dnl gettext is already preinstalled in libintl, we update this
  223         dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
  224         if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \
  225            || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \
  226                 && test "$PACKAGE" != gettext-runtime \
  227                 && test "$PACKAGE" != gettext-tools; }; then
  228           gt_use_preinstalled_gnugettext=yes
  229         else
  230           dnl Reset the values set by searching for libintl.
  231           LIBINTL=
  232           LTLIBINTL=
  233           INCINTL=
  234         fi
  235 
  236     ifelse(gt_included_intl, yes, [
  237         if test "$gt_use_preinstalled_gnugettext" != "yes"; then
  238           dnl GNU gettext is not found in the C library.
  239           dnl Fall back on included GNU gettext library.
  240           nls_cv_use_gnu_gettext=yes
  241         fi
  242       fi
  243 
  244       if test "$nls_cv_use_gnu_gettext" = "yes"; then
  245         dnl Mark actions used to generate GNU NLS library.
  246         BUILD_INCLUDED_LIBINTL=yes
  247         USE_INCLUDED_LIBINTL=yes
  248         LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV $LIBTHREAD"
  249         LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV $LTLIBTHREAD"
  250         LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
  251       fi
  252 
  253       CATOBJEXT=
  254       if test "$gt_use_preinstalled_gnugettext" = "yes" \
  255          || test "$nls_cv_use_gnu_gettext" = "yes"; then
  256         dnl Mark actions to use GNU gettext tools.
  257         CATOBJEXT=.gmo
  258       fi
  259     ])
  260 
  261     if test -n "$INTL_MACOSX_LIBS"; then
  262       if test "$gt_use_preinstalled_gnugettext" = "yes" \
  263          || test "$nls_cv_use_gnu_gettext" = "yes"; then
  264         dnl Some extra flags are needed during linking.
  265         LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
  266         LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
  267       fi
  268     fi
  269 
  270     if test "$gt_use_preinstalled_gnugettext" = "yes" \
  271        || test "$nls_cv_use_gnu_gettext" = "yes"; then
  272       AC_DEFINE([ENABLE_NLS], [1],
  273         [Define to 1 if translation of program messages to the user's native language
  274    is requested.])
  275     else
  276       USE_NLS=no
  277     fi
  278   fi
  279 
  280   AC_MSG_CHECKING([whether to use NLS])
  281   AC_MSG_RESULT([$USE_NLS])
  282   if test "$USE_NLS" = "yes"; then
  283     AC_MSG_CHECKING([where the gettext function comes from])
  284     if test "$gt_use_preinstalled_gnugettext" = "yes"; then
  285       if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
  286         gt_source="external libintl"
  287       else
  288         gt_source="libc"
  289       fi
  290     else
  291       gt_source="included intl directory"
  292     fi
  293     AC_MSG_RESULT([$gt_source])
  294   fi
  295 
  296   if test "$USE_NLS" = "yes"; then
  297 
  298     if test "$gt_use_preinstalled_gnugettext" = "yes"; then
  299       if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
  300         AC_MSG_CHECKING([how to link with libintl])
  301         AC_MSG_RESULT([$LIBINTL])
  302         AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
  303       fi
  304 
  305       dnl For backward compatibility. Some packages may be using this.
  306       AC_DEFINE([HAVE_GETTEXT], [1],
  307        [Define if the GNU gettext() function is already present or preinstalled.])
  308       AC_DEFINE([HAVE_DCGETTEXT], [1],
  309        [Define if the GNU dcgettext() function is already present or preinstalled.])
  310     fi
  311 
  312     dnl We need to process the po/ directory.
  313     POSUB=po
  314   fi
  315 
  316   ifelse(gt_included_intl, yes, [
  317     dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
  318     dnl to 'yes' because some of the testsuite requires it.
  319     if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
  320       BUILD_INCLUDED_LIBINTL=yes
  321     fi
  322 
  323     dnl Make all variables we use known to autoconf.
  324     AC_SUBST([BUILD_INCLUDED_LIBINTL])
  325     AC_SUBST([USE_INCLUDED_LIBINTL])
  326     AC_SUBST([CATOBJEXT])
  327 
  328     dnl For backward compatibility. Some configure.ins may be using this.
  329     nls_cv_header_intl=
  330     nls_cv_header_libgt=
  331 
  332     dnl For backward compatibility. Some Makefiles may be using this.
  333     DATADIRNAME=share
  334     AC_SUBST([DATADIRNAME])
  335 
  336     dnl For backward compatibility. Some Makefiles may be using this.
  337     INSTOBJEXT=.mo
  338     AC_SUBST([INSTOBJEXT])
  339 
  340     dnl For backward compatibility. Some Makefiles may be using this.
  341     GENCAT=gencat
  342     AC_SUBST([GENCAT])
  343 
  344     dnl For backward compatibility. Some Makefiles may be using this.
  345     INTLOBJS=
  346     if test "$USE_INCLUDED_LIBINTL" = yes; then
  347       INTLOBJS="\$(GETTOBJS)"
  348     fi
  349     AC_SUBST([INTLOBJS])
  350 
  351     dnl Enable libtool support if the surrounding package wishes it.
  352     INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
  353     AC_SUBST([INTL_LIBTOOL_SUFFIX_PREFIX])
  354   ])
  355 
  356   dnl For backward compatibility. Some Makefiles may be using this.
  357   INTLLIBS="$LIBINTL"
  358   AC_SUBST([INTLLIBS])
  359 
  360   dnl Make all documented variables known to autoconf.
  361   AC_SUBST([LIBINTL])
  362   AC_SUBST([LTLIBINTL])
  363   AC_SUBST([POSUB])
  364 ])
  365 
  366 
  367 dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.
  368 m4_define([gt_NEEDS_INIT],
  369 [
  370   m4_divert_text([DEFAULTS], [gt_needs=])
  371   m4_define([gt_NEEDS_INIT], [])
  372 ])
  373 
  374 
  375 dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
  376 AC_DEFUN([AM_GNU_GETTEXT_NEED],
  377 [
  378   m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])
  379 ])
  380 
  381 
  382 dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
  383 AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])