elinks/config/m4/gettext.m4

# Macro to add for using GNU gettext.
# Ulrich Drepper <drepper@cygnus.com>, 1995.
#
# This file can be copied and used freely without restrictions.  It can
# be used in projects which are not available under the GNU General Public
# License but which still want to provide support for the GNU gettext
# functionality.
# Please note that the actual code of GNU gettext is covered by the GNU
# General Public License and is *not* in the public domain.

# serial 10

dnl Note that we always use own gettext implementation, even if we found
dnl working system one. We have some own modifications in our implementation
dnl and we rely on them.

dnl Usage: AM_WITH_NLS([TOOLSYMBOL], [NEEDSYMBOL], [LIBDIR]).
dnl If TOOLSYMBOL is specified and 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). Otherwise, a static library
dnl    $(top_builddir)/intl/libintl.a will be created.
dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
dnl    implementations (in libc or libintl) without the ngettext() function
dnl    will be ignored.
dnl LIBDIR is used to find the intl libraries.  If empty,
dnl    the value `$(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 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_WITH_NLS],
  [AC_MSG_CHECKING([whether NLS is requested])
    dnl Default is enabled NLS
    CONFIG_NLS=yes
    EL_ARG_ENABLE(CONFIG_NLS, nls, [Native Language Support],
      [  --disable-nls           do not use Native Language Support])

    AC_MSG_RESULT($CONFIG_NLS)
    AC_SUBST(CONFIG_NLS)

    AM_CONDITIONAL(CONFIG_NLS, test "$CONFIG_NLS" = "yes")

    dnl If we use NLS figure out what method
    if test "$CONFIG_NLS" = "yes"; then
      AC_DEFINE(CONFIG_NLS, 1,
        [Define to 1 if translation of program messages to the user's native language
   is requested.])
dnl      AC_MSG_CHECKING([whether included gettext is requested])
dnl      AC_ARG_WITH(included-gettext,
dnl        [  --with-included-gettext use the GNU gettext library included here],
dnl        nls_cv_force_use_gnu_gettext=$withval,
dnl        nls_cv_force_use_gnu_gettext=no)
dnl      AC_MSG_RESULT($nls_cv_force_use_gnu_gettext)

      nls_cv_force_use_gnu_gettext=yes
      nls_cv_use_gnu_gettext=yes

      dnl Mark actions used to generate GNU NLS library.
      AM_PATH_PROG_WITH_TEST(MSGFMT, msgfmt,
	[$ac_dir/$ac_word --statistics /dev/null >/dev/null 2>&1], :)
      AC_PATH_PROG(GMSGFMT, gmsgfmt, $MSGFMT)
      AM_PATH_PROG_WITH_TEST(XGETTEXT, xgettext,
	[$ac_dir/$ac_word --omit-header /dev/null >/dev/null 2>&1], :)
      AC_SUBST(MSGFMT)
      LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
      LIBS="$LIBS $LIBICONV"

      dnl This could go away some day; the PATH_PROG_WITH_TEST already does it.
      dnl Test whether we really found GNU msgfmt.
      if test "$GMSGFMT" != ":"; then
	dnl If it is no GNU msgfmt we define it as : so that the
	dnl Makefiles still can work.
	if $GMSGFMT --statistics /dev/null >/dev/null 2>&1; then
	  : ;
	else
	  AC_MSG_RESULT(
	    [found msgfmt program is not GNU msgfmt; ignore it])
	  GMSGFMT=":"
	fi
      fi

      dnl This could go away some day; the PATH_PROG_WITH_TEST already does it.
      dnl Test whether we really found GNU xgettext.
      if test "$XGETTEXT" != ":"; then
	dnl If it is no GNU xgettext we define it as : so that the
	dnl Makefiles still can work.
	if $XGETTEXT --omit-header /dev/null >/dev/null 2>&1; then
	  : ;
	else
	  AC_MSG_RESULT(
	    [found xgettext program is not GNU xgettext; ignore it])
	  XGETTEXT=":"
	fi
      fi
    fi


    dnl intl/plural.c is generated from intl/plural.y. It requires bison,
    dnl because plural.y uses bison specific features. It requires at least
    dnl bison-1.26 because earlier versions generate a plural.c that doesn't
    dnl compile.
    dnl bison is only needed for the maintainer (who touches plural.y). But in
    dnl order to avoid separate Makefiles or --enable-maintainer-mode, we put
    dnl the rule in general Makefile. Now, some people carelessly touch the
    dnl files or have a broken "make" program, hence the plural.c rule will
    dnl sometimes fire. To avoid an error, defines BISON to ":" if it is not
    dnl present or too old.
    AC_CHECK_PROGS([INTLBISON], [bison])
    if test -z "$INTLBISON"; then
      ac_verc_fail=yes
    else
      dnl Found it, now check the version.
      AC_MSG_CHECKING([version of bison])
changequote(<<,>>)dnl
      ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
      case $ac_prog_version in
        '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
        1.2[6-9]* | 1.[3-9][0-9]* | [2-9].*)
changequote([,])dnl
           ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
        *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
      esac
      AC_MSG_RESULT([$ac_prog_version])
    fi
    if test $ac_verc_fail = yes; then
      INTLBISON=:
    fi

    dnl These rules are solely for the distribution goal.  While doing this
    dnl we only have to keep exactly one list of the available catalogs
    dnl in configure.in.
    for lang in $ALL_LINGUAS; do
      GMOFILES="$GMOFILES $lang.gmo"
    done

    dnl Make all variables we use known to autoconf.
    AC_SUBST(CATALOGS)
    AC_SUBST(GMOFILES)

    dnl For backward compatibility. Some configure.ins may be using this.
    nls_cv_header_intl=
    nls_cv_header_libgt=
  ])

dnl Usage: Just like AM_WITH_NLS, which see.
AC_DEFUN([AM_GNU_GETTEXT],
  [AC_REQUIRE([AC_PROG_MAKE_SET])dnl
   AC_REQUIRE([AC_PROG_CC])dnl
   AC_REQUIRE([AC_CANONICAL_HOST])dnl
   AC_REQUIRE([AC_PROG_RANLIB])dnl
   AC_REQUIRE([AC_ISC_POSIX])dnl
   AC_REQUIRE([AC_HEADER_STDC])dnl
   AC_REQUIRE([AC_C_CONST])dnl
   AC_REQUIRE([AC_C_INLINE])dnl
   AC_REQUIRE([AC_TYPE_OFF_T])dnl
   AC_REQUIRE([AC_TYPE_SIZE_T])dnl
   AC_REQUIRE([AC_FUNC_ALLOCA])dnl
   AC_REQUIRE([AC_FUNC_MMAP])dnl
   AC_REQUIRE([jm_GLIBC21])dnl

   AC_CHECK_HEADERS([argz.h limits.h locale.h nl_types.h malloc.h stddef.h \
stdlib.h string.h unistd.h sys/param.h])
   AC_CHECK_FUNCS([feof_unlocked fgets_unlocked getcwd getegid geteuid \
getgid getuid mempcpy munmap putenv setenv setlocale stpcpy strchr strcasecmp \
strdup strtoul tsearch __argz_count __argz_stringify __argz_next])

   AM_ICONV
   AM_LANGINFO_CODESET
   AM_LC_MESSAGES
   AM_WITH_NLS([$1],[$2],[$3])

   if test "x$ALL_LINGUAS" = "x"; then
     LINGUAS=
   else
     AC_MSG_CHECKING(for catalogs to be installed)
     NEW_LINGUAS=
     for presentlang in $ALL_LINGUAS; do
       useit=no
       for desiredlang in ${LINGUAS-$ALL_LINGUAS}; do
         # Use the presentlang catalog if desiredlang is
         #   a. equal to presentlang, or
         #   b. a variant of presentlang (because in this case,
         #      presentlang can be used as a fallback for messages
         #      which are not translated in the desiredlang catalog).
         case "$desiredlang" in
           "$presentlang"*) useit=yes;;
         esac
       done
       if test $useit = yes; then
         NEW_LINGUAS="$NEW_LINGUAS $presentlang"
       fi
     done
     LINGUAS=$NEW_LINGUAS
     AC_MSG_RESULT($LINGUAS)
   fi

   dnl Construct list of names of catalog files to be constructed.
   if test -n "$LINGUAS"; then
     for lang in $LINGUAS; do CATALOGS="$CATALOGS $lang.gmo"; done
   fi

   dnl If the AC_CONFIG_AUX_DIR macro for autoconf is used we possibly
   dnl find the mkinstalldirs script in another subdir but $(top_srcdir).
   dnl Try to locate is.
   MKINSTALLDIRS=
   if test -n "$ac_aux_dir"; then
     MKINSTALLDIRS="$ac_aux_dir/mkinstalldirs"
   fi
   if test -z "$MKINSTALLDIRS"; then
     MKINSTALLDIRS="\$(top_srcdir)/mkinstalldirs"
   fi
   AC_SUBST(MKINSTALLDIRS)

   dnl Enable libtool support if the surrounding package wishes it.
   INTL_LIBTOOL_SUFFIX_PREFIX=ifelse([$1], use-libtool, [l], [])
   AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
  ])