# gettext.m4 serial 70 (gettext-0.20)

dnl Copyright (C) 1995-2014, 2016, 2018 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

dnl This file can be used in projects which are not available under

dnl the GNU General Public License or the GNU Library General Public

dnl License but which still want to provide support for the GNU gettext

dnl functionality.

dnl Please note that the actual code of the GNU gettext library is covered

dnl by the GNU Library General Public License, and the rest of the GNU

dnl gettext package is covered by the GNU General Public License.

dnl They are *not* in the public domain.

dnl Authors:

dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.

dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2006, 2008-2010.

dnl Macro to add for using GNU gettext.

dnl Usage: AM_GNU_GETTEXT([INTLSYMBOL], [NEEDSYMBOL], [INTLDIR]).

dnl INTLSYMBOL must be one of 'external', 'use-libtool'.

dnl    INTLSYMBOL should be 'external' for packages other than GNU gettext, and

dnl    'use-libtool' for the packages 'gettext-runtime' and 'gettext-tools'.

dnl    If INTLSYMBOL is 'use-libtool', then a libtool library

dnl    $(top_builddir)/intl/libintl.la will be created (shared and/or static,

dnl    depending on --{enable,disable}-{shared,static} and on the presence of

dnl    AM-DISABLE-SHARED).

dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext

dnl    implementations (in libc or libintl) without the ngettext() function

dnl    will be ignored.  If NEEDSYMBOL is specified and is

dnl    'need-formatstring-macros', then GNU gettext implementations that don't

dnl    support the ISO C 99 <inttypes.h> formatstring macros will be ignored.

dnl INTLDIR is used to find the intl libraries.  If empty,

dnl    the value '$(top_builddir)/intl/' is used.

dnl

dnl The result of the configuration is one of three cases:

dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled

dnl    and used.

dnl    Catalog format: GNU --> install in $(datadir)

dnl    Catalog extension: .mo after installation, .gmo in source tree

dnl 2) GNU gettext has been found in the system's C library.

dnl    Catalog format: GNU --> install in $(datadir)

dnl    Catalog extension: .mo after installation, .gmo in source tree

dnl 3) No internationalization, always use English msgid.

dnl    Catalog format: none

dnl    Catalog extension: none

dnl If INTLSYMBOL is 'external', only cases 2 and 3 can occur.

dnl The use of .gmo is historical (it was needed to avoid overwriting the

dnl GNU format catalogs when building on a platform with an X/Open gettext),

dnl but we keep it in order not to force irrelevant filename changes on the

dnl maintainers.

dnl

AC_DEFUN([AM_GNU_GETTEXT],

[

  dnl Argument checking.

  ifelse([$1], [], , [ifelse([$1], [external], , [ifelse([$1], [use-libtool], ,

    [errprint([ERROR: invalid first argument to AM_GNU_GETTEXT

])])])])

  ifelse(ifelse([$1], [], [old])[]ifelse([$1], [no-libtool], [old]), [old],

    [errprint([ERROR: Use of AM_GNU_GETTEXT without [external] argument is no longer supported.

])])

  ifelse([$2], [], , [ifelse([$2], [need-ngettext], , [ifelse([$2], [need-formatstring-macros], ,

    [errprint([ERROR: invalid second argument to AM_GNU_GETTEXT

])])])])

  define([gt_included_intl],

    ifelse([$1], [external], [no], [yes]))

  gt_NEEDS_INIT

  AM_GNU_GETTEXT_NEED([$2])

  AC_REQUIRE([AM_PO_SUBDIRS])dnl

  ifelse(gt_included_intl, yes, [

    AC_REQUIRE([AM_INTL_SUBDIR])dnl

  ])

  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.

  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])

  AC_REQUIRE([AC_LIB_RPATH])

  dnl Sometimes libintl requires libiconv, so first search for libiconv.

  dnl Ideally we would do this search only after the

  dnl      if test "$USE_NLS" = "yes"; then

  dnl        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then

  dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT

  dnl the configure script would need to contain the same shell code

  dnl again, outside any 'if'. There are two solutions:

  dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.

  dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.

  dnl Since AC_PROVIDE_IFELSE is not documented, we avoid it.

  ifelse(gt_included_intl, yes, , [

    AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])

  ])

  dnl Sometimes, on Mac OS X, libintl requires linking with CoreFoundation.

  gt_INTL_MACOSX

  dnl Set USE_NLS.

  AC_REQUIRE([AM_NLS])

  ifelse(gt_included_intl, yes, [

    BUILD_INCLUDED_LIBINTL=no

    USE_INCLUDED_LIBINTL=no

  ])

  LIBINTL=

  LTLIBINTL=

  POSUB=

  dnl Add a version number to the cache macros.

  case " $gt_needs " in

    *" need-formatstring-macros "*) gt_api_version=3 ;;

    *" need-ngettext "*) gt_api_version=2 ;;

    *) gt_api_version=1 ;;

  esac

  gt_func_gnugettext_libc="gt_cv_func_gnugettext${gt_api_version}_libc"

  gt_func_gnugettext_libintl="gt_cv_func_gnugettext${gt_api_version}_libintl"

  dnl If we use NLS figure out what method

  if test "$USE_NLS" = "yes"; then

    gt_use_preinstalled_gnugettext=no

    ifelse(gt_included_intl, yes, [

      AC_MSG_CHECKING([whether included gettext is requested])

      AC_ARG_WITH([included-gettext],

        [  --with-included-gettext use the GNU gettext library included here],

        nls_cv_force_use_gnu_gettext=$withval,

        nls_cv_force_use_gnu_gettext=no)

      AC_MSG_RESULT([$nls_cv_force_use_gnu_gettext])

      nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"

      if test "$nls_cv_force_use_gnu_gettext" != "yes"; then

    ])

        dnl User does not insist on using GNU NLS library.  Figure out what

        dnl to use.  If GNU gettext is available we use this.  Else we have

        dnl to fall back to GNU NLS library.

        if test $gt_api_version -ge 3; then

          gt_revision_test_code='

#ifndef __GNU_GETTEXT_SUPPORTED_REVISION

#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)

#endif

changequote(,)dnl

typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];

changequote([,])dnl

'

        else

          gt_revision_test_code=

        fi

        if test $gt_api_version -ge 2; then

          gt_expression_test_code=' + * ngettext ("", "", 0)'

        else

          gt_expression_test_code=

        fi

        AC_CACHE_CHECK([for GNU gettext in libc], [$gt_func_gnugettext_libc],

         [AC_LINK_IFELSE(

            [AC_LANG_PROGRAM(

               [[

#include <libintl.h>

#ifndef __GNU_GETTEXT_SUPPORTED_REVISION

extern int _nl_msg_cat_cntr;

extern int *_nl_domain_bindings;

#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_domain_bindings)

#else

#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0

#endif

$gt_revision_test_code

               ]],

               [[

bindtextdomain ("", "");

return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION

               ]])],

            [eval "$gt_func_gnugettext_libc=yes"],

            [eval "$gt_func_gnugettext_libc=no"])])

        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then

          dnl Sometimes libintl requires libiconv, so first search for libiconv.

          ifelse(gt_included_intl, yes, , [

            AM_ICONV_LINK

          ])

          dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL

          dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])

          dnl because that would add "-liconv" to LIBINTL and LTLIBINTL

          dnl even if libiconv doesn't exist.

          AC_LIB_LINKFLAGS_BODY([intl])

          AC_CACHE_CHECK([for GNU gettext in libintl],

            [$gt_func_gnugettext_libintl],

           [gt_save_CPPFLAGS="$CPPFLAGS"

            CPPFLAGS="$CPPFLAGS $INCINTL"

            gt_save_LIBS="$LIBS"

            LIBS="$LIBS $LIBINTL"

            dnl Now see whether libintl exists and does not depend on libiconv.

            AC_LINK_IFELSE(

              [AC_LANG_PROGRAM(

                 [[

#include <libintl.h>

#ifndef __GNU_GETTEXT_SUPPORTED_REVISION

extern int _nl_msg_cat_cntr;

extern

#ifdef __cplusplus

"C"

#endif

const char *_nl_expand_alias (const char *);

#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (""))

#else

#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0

#endif

$gt_revision_test_code

                 ]],

                 [[

bindtextdomain ("", "");

return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION

                 ]])],

              [eval "$gt_func_gnugettext_libintl=yes"],

              [eval "$gt_func_gnugettext_libintl=no"])

            dnl Now see whether libintl exists and depends on libiconv.

            if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then

              LIBS="$LIBS $LIBICONV"

              AC_LINK_IFELSE(

                [AC_LANG_PROGRAM(

                   [[

#include <libintl.h>

#ifndef __GNU_GETTEXT_SUPPORTED_REVISION

extern int _nl_msg_cat_cntr;

extern

#ifdef __cplusplus

"C"

#endif

const char *_nl_expand_alias (const char *);

#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (""))

#else

#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0

#endif

$gt_revision_test_code

                   ]],

                   [[

bindtextdomain ("", "");

return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION

                   ]])],

                [LIBINTL="$LIBINTL $LIBICONV"

                 LTLIBINTL="$LTLIBINTL $LTLIBICONV"

                 eval "$gt_func_gnugettext_libintl=yes"

                ])

            fi

            CPPFLAGS="$gt_save_CPPFLAGS"

            LIBS="$gt_save_LIBS"])

        fi

        dnl If an already present or preinstalled GNU gettext() is found,

        dnl use it.  But if this macro is used in GNU gettext, and GNU

        dnl gettext is already preinstalled in libintl, we update this

        dnl libintl.  (Cf. the install rule in intl/Makefile.in.)

        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \

           || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \

                && test "$PACKAGE" != gettext-runtime \

                && test "$PACKAGE" != gettext-tools; }; then

          gt_use_preinstalled_gnugettext=yes

        else

          dnl Reset the values set by searching for libintl.

          LIBINTL=

          LTLIBINTL=

          INCINTL=

        fi

    ifelse(gt_included_intl, yes, [

        if test "$gt_use_preinstalled_gnugettext" != "yes"; then

          dnl GNU gettext is not found in the C library.

          dnl Fall back on included GNU gettext library.

          nls_cv_use_gnu_gettext=yes

        fi

      fi

      if test "$nls_cv_use_gnu_gettext" = "yes"; then

        dnl Mark actions used to generate GNU NLS library.

        BUILD_INCLUDED_LIBINTL=yes

        USE_INCLUDED_LIBINTL=yes

        LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.la $LIBICONV $LIBTHREAD"

        LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.la $LTLIBICONV $LTLIBTHREAD"

        LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`

      fi

      CATOBJEXT=

      if test "$gt_use_preinstalled_gnugettext" = "yes" \

         || test "$nls_cv_use_gnu_gettext" = "yes"; then

        dnl Mark actions to use GNU gettext tools.

        CATOBJEXT=.gmo

      fi

    ])

    if test -n "$INTL_MACOSX_LIBS"; then

      if test "$gt_use_preinstalled_gnugettext" = "yes" \

         || test "$nls_cv_use_gnu_gettext" = "yes"; then

        dnl Some extra flags are needed during linking.

        LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"

        LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"

      fi

    fi

    if test "$gt_use_preinstalled_gnugettext" = "yes" \

       || test "$nls_cv_use_gnu_gettext" = "yes"; then

      AC_DEFINE([ENABLE_NLS], [1],

        [Define to 1 if translation of program messages to the user's native language

   is requested.])

    else

      USE_NLS=no

    fi

  fi

  AC_MSG_CHECKING([whether to use NLS])

  AC_MSG_RESULT([$USE_NLS])

  if test "$USE_NLS" = "yes"; then

    AC_MSG_CHECKING([where the gettext function comes from])

    if test "$gt_use_preinstalled_gnugettext" = "yes"; then

      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then

        gt_source="external libintl"

      else

        gt_source="libc"

      fi

    else

      gt_source="included intl directory"

    fi

    AC_MSG_RESULT([$gt_source])

  fi

  if test "$USE_NLS" = "yes"; then

    if test "$gt_use_preinstalled_gnugettext" = "yes"; then

      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then

        AC_MSG_CHECKING([how to link with libintl])

        AC_MSG_RESULT([$LIBINTL])

        AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])

      fi

      dnl For backward compatibility. Some packages may be using this.

      AC_DEFINE([HAVE_GETTEXT], [1],

       [Define if the GNU gettext() function is already present or preinstalled.])

      AC_DEFINE([HAVE_DCGETTEXT], [1],

       [Define if the GNU dcgettext() function is already present or preinstalled.])

    fi

    dnl We need to process the po/ directory.

    POSUB=po

  fi

  ifelse(gt_included_intl, yes, [

    dnl In GNU gettext we have to set BUILD_INCLUDED_LIBINTL to 'yes'

    dnl because some of the testsuite requires it.

    BUILD_INCLUDED_LIBINTL=yes

    dnl Make all variables we use known to autoconf.

    AC_SUBST([BUILD_INCLUDED_LIBINTL])

    AC_SUBST([USE_INCLUDED_LIBINTL])

    AC_SUBST([CATOBJEXT])

  ])

  dnl For backward compatibility. Some Makefiles may be using this.

  INTLLIBS="$LIBINTL"

  AC_SUBST([INTLLIBS])

  dnl Make all documented variables known to autoconf.

  AC_SUBST([LIBINTL])

  AC_SUBST([LTLIBINTL])

  AC_SUBST([POSUB])

])

dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.

m4_define([gt_NEEDS_INIT],

[

  m4_divert_text([DEFAULTS], [gt_needs=])

  m4_define([gt_NEEDS_INIT], [])

])

dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])

AC_DEFUN([AM_GNU_GETTEXT_NEED],

[

  m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])

])

dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])

AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])

dnl Usage: AM_GNU_GETTEXT_REQUIRE_VERSION([gettext-version])

AC_DEFUN([AM_GNU_GETTEXT_REQUIRE_VERSION], [])