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    1 # gettext.m4 serial 66 (gettext-0.18.2)
    2 dnl Copyright (C) 1995-2013 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 Mac OS 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_LINK_IFELSE(
  161             [AC_LANG_PROGRAM(
  162                [[
  163 #include <libintl.h>
  164 $gt_revision_test_code
  165 extern int _nl_msg_cat_cntr;
  166 extern int *_nl_domain_bindings;
  167                ]],
  168                [[
  169 bindtextdomain ("", "");
  170 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_domain_bindings
  171                ]])],
  172             [eval "$gt_func_gnugettext_libc=yes"],
  173             [eval "$gt_func_gnugettext_libc=no"])])
  174 
  175         if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
  176           dnl Sometimes libintl requires libiconv, so first search for libiconv.
  177           ifelse(gt_included_intl, yes, , [
  178             AM_ICONV_LINK
  179           ])
  180           dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
  181           dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
  182           dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
  183           dnl even if libiconv doesn't exist.
  184           AC_LIB_LINKFLAGS_BODY([intl])
  185           AC_CACHE_CHECK([for GNU gettext in libintl],
  186             [$gt_func_gnugettext_libintl],
  187            [gt_save_CPPFLAGS="$CPPFLAGS"
  188             CPPFLAGS="$CPPFLAGS $INCINTL"
  189             gt_save_LIBS="$LIBS"
  190             LIBS="$LIBS $LIBINTL"
  191             dnl Now see whether libintl exists and does not depend on libiconv.
  192             AC_LINK_IFELSE(
  193               [AC_LANG_PROGRAM(
  194                  [[
  195 #include <libintl.h>
  196 $gt_revision_test_code
  197 extern int _nl_msg_cat_cntr;
  198 extern
  199 #ifdef __cplusplus
  200 "C"
  201 #endif
  202 const char *_nl_expand_alias (const char *);
  203                  ]],
  204                  [[
  205 bindtextdomain ("", "");
  206 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")
  207                  ]])],
  208               [eval "$gt_func_gnugettext_libintl=yes"],
  209               [eval "$gt_func_gnugettext_libintl=no"])
  210             dnl Now see whether libintl exists and depends on libiconv.
  211             if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then
  212               LIBS="$LIBS $LIBICONV"
  213               AC_LINK_IFELSE(
  214                 [AC_LANG_PROGRAM(
  215                    [[
  216 #include <libintl.h>
  217 $gt_revision_test_code
  218 extern int _nl_msg_cat_cntr;
  219 extern
  220 #ifdef __cplusplus
  221 "C"
  222 #endif
  223 const char *_nl_expand_alias (const char *);
  224                    ]],
  225                    [[
  226 bindtextdomain ("", "");
  227 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")
  228                    ]])],
  229                 [LIBINTL="$LIBINTL $LIBICONV"
  230                  LTLIBINTL="$LTLIBINTL $LTLIBICONV"
  231                  eval "$gt_func_gnugettext_libintl=yes"
  232                 ])
  233             fi
  234             CPPFLAGS="$gt_save_CPPFLAGS"
  235             LIBS="$gt_save_LIBS"])
  236         fi
  237 
  238         dnl If an already present or preinstalled GNU gettext() is found,
  239         dnl use it.  But if this macro is used in GNU gettext, and GNU
  240         dnl gettext is already preinstalled in libintl, we update this
  241         dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
  242         if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \
  243            || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \
  244                 && test "$PACKAGE" != gettext-runtime \
  245                 && test "$PACKAGE" != gettext-tools; }; then
  246           gt_use_preinstalled_gnugettext=yes
  247         else
  248           dnl Reset the values set by searching for libintl.
  249           LIBINTL=
  250           LTLIBINTL=
  251           INCINTL=
  252         fi
  253 
  254     ifelse(gt_included_intl, yes, [
  255         if test "$gt_use_preinstalled_gnugettext" != "yes"; then
  256           dnl GNU gettext is not found in the C library.
  257           dnl Fall back on included GNU gettext library.
  258           nls_cv_use_gnu_gettext=yes
  259         fi
  260       fi
  261 
  262       if test "$nls_cv_use_gnu_gettext" = "yes"; then
  263         dnl Mark actions used to generate GNU NLS library.
  264         BUILD_INCLUDED_LIBINTL=yes
  265         USE_INCLUDED_LIBINTL=yes
  266         LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV $LIBTHREAD"
  267         LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV $LTLIBTHREAD"
  268         LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
  269       fi
  270 
  271       CATOBJEXT=
  272       if test "$gt_use_preinstalled_gnugettext" = "yes" \
  273          || test "$nls_cv_use_gnu_gettext" = "yes"; then
  274         dnl Mark actions to use GNU gettext tools.
  275         CATOBJEXT=.gmo
  276       fi
  277     ])
  278 
  279     if test -n "$INTL_MACOSX_LIBS"; then
  280       if test "$gt_use_preinstalled_gnugettext" = "yes" \
  281          || test "$nls_cv_use_gnu_gettext" = "yes"; then
  282         dnl Some extra flags are needed during linking.
  283         LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
  284         LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
  285       fi
  286     fi
  287 
  288     if test "$gt_use_preinstalled_gnugettext" = "yes" \
  289        || test "$nls_cv_use_gnu_gettext" = "yes"; then
  290       AC_DEFINE([ENABLE_NLS], [1],
  291         [Define to 1 if translation of program messages to the user's native language
  292    is requested.])
  293     else
  294       USE_NLS=no
  295     fi
  296   fi
  297 
  298   AC_MSG_CHECKING([whether to use NLS])
  299   AC_MSG_RESULT([$USE_NLS])
  300   if test "$USE_NLS" = "yes"; then
  301     AC_MSG_CHECKING([where the gettext function comes from])
  302     if test "$gt_use_preinstalled_gnugettext" = "yes"; then
  303       if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
  304         gt_source="external libintl"
  305       else
  306         gt_source="libc"
  307       fi
  308     else
  309       gt_source="included intl directory"
  310     fi
  311     AC_MSG_RESULT([$gt_source])
  312   fi
  313 
  314   if test "$USE_NLS" = "yes"; then
  315 
  316     if test "$gt_use_preinstalled_gnugettext" = "yes"; then
  317       if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
  318         AC_MSG_CHECKING([how to link with libintl])
  319         AC_MSG_RESULT([$LIBINTL])
  320         AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
  321       fi
  322 
  323       dnl For backward compatibility. Some packages may be using this.
  324       AC_DEFINE([HAVE_GETTEXT], [1],
  325        [Define if the GNU gettext() function is already present or preinstalled.])
  326       AC_DEFINE([HAVE_DCGETTEXT], [1],
  327        [Define if the GNU dcgettext() function is already present or preinstalled.])
  328     fi
  329 
  330     dnl We need to process the po/ directory.
  331     POSUB=po
  332   fi
  333 
  334   ifelse(gt_included_intl, yes, [
  335     dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
  336     dnl to 'yes' because some of the testsuite requires it.
  337     if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
  338       BUILD_INCLUDED_LIBINTL=yes
  339     fi
  340 
  341     dnl Make all variables we use known to autoconf.
  342     AC_SUBST([BUILD_INCLUDED_LIBINTL])
  343     AC_SUBST([USE_INCLUDED_LIBINTL])
  344     AC_SUBST([CATOBJEXT])
  345 
  346     dnl For backward compatibility. Some configure.ins may be using this.
  347     nls_cv_header_intl=
  348     nls_cv_header_libgt=
  349 
  350     dnl For backward compatibility. Some Makefiles may be using this.
  351     DATADIRNAME=share
  352     AC_SUBST([DATADIRNAME])
  353 
  354     dnl For backward compatibility. Some Makefiles may be using this.
  355     INSTOBJEXT=.mo
  356     AC_SUBST([INSTOBJEXT])
  357 
  358     dnl For backward compatibility. Some Makefiles may be using this.
  359     GENCAT=gencat
  360     AC_SUBST([GENCAT])
  361 
  362     dnl For backward compatibility. Some Makefiles may be using this.
  363     INTLOBJS=
  364     if test "$USE_INCLUDED_LIBINTL" = yes; then
  365       INTLOBJS="\$(GETTOBJS)"
  366     fi
  367     AC_SUBST([INTLOBJS])
  368 
  369     dnl Enable libtool support if the surrounding package wishes it.
  370     INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
  371     AC_SUBST([INTL_LIBTOOL_SUFFIX_PREFIX])
  372   ])
  373 
  374   dnl For backward compatibility. Some Makefiles may be using this.
  375   INTLLIBS="$LIBINTL"
  376   AC_SUBST([INTLLIBS])
  377 
  378   dnl Make all documented variables known to autoconf.
  379   AC_SUBST([LIBINTL])
  380   AC_SUBST([LTLIBINTL])
  381   AC_SUBST([POSUB])
  382 ])
  383 
  384 
  385 dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.
  386 m4_define([gt_NEEDS_INIT],
  387 [
  388   m4_divert_text([DEFAULTS], [gt_needs=])
  389   m4_define([gt_NEEDS_INIT], [])
  390 ])
  391 
  392 
  393 dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
  394 AC_DEFUN([AM_GNU_GETTEXT_NEED],
  395 [
  396   m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])
  397 ])
  398 
  399 
  400 dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
  401 AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])