m4/gettext.m4

   1 # Macro to add for using GNU gettext.
   2 # Ulrich Drepper <drepper@cygnus.com>, 1995.
   3 #
   4 # This file can be copied and used freely without restrictions.  It can
   5 # be used in projects which are not available under the GNU General Public
   6 # License or the GNU Library General Public License but which still want
   7 # to provide support for the GNU gettext functionality.
   8 # Please note that the actual code of the GNU gettext library is covered
   9 # by the GNU Library General Public License, and the rest of the GNU
  10 # gettext package package is covered by the GNU General Public License.
  11 # They are *not* in the public domain.
  12
  13 # serial 10
  14
  15 dnl Usage: AM_WITH_NLS([TOOLSYMBOL], [NEEDSYMBOL], [LIBDIR]).
  16 dnl If TOOLSYMBOL is specified and is 'use-libtool', then a libtool library
  17 dnl    $(top_builddir)/intl/libintl.la will be created (shared and/or static,
  18 dnl    depending on --{enable,disable}-{shared,static} and on the presence of
  19 dnl    AM-DISABLE-SHARED). Otherwise, a static library
  20 dnl    $(top_builddir)/intl/libintl.a will be created.
  21 dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
  22 dnl    implementations (in libc or libintl) without the ngettext() function
  23 dnl    will be ignored.
  24 dnl LIBDIR is used to find the intl libraries.  If empty,
  25 dnl    the value `$(top_builddir)/intl/' is used.
  26 dnl
  27 dnl The result of the configuration is one of three cases:
  28 dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled
  29 dnl    and used.
  30 dnl    Catalog format: GNU --> install in $(datadir)
  31 dnl    Catalog extension: .mo after installation, .gmo in source tree
  32 dnl 2) GNU gettext has been found in the system's C library.
  33 dnl    Catalog format: GNU --> install in $(datadir)
  34 dnl    Catalog extension: .mo after installation, .gmo in source tree
  35 dnl 3) No internationalization, always use English msgid.
  36 dnl    Catalog format: none
  37 dnl    Catalog extension: none
  38 dnl The use of .gmo is historical (it was needed to avoid overwriting the
  39 dnl GNU format catalogs when building on a platform with an X/Open gettext),
  40 dnl but we keep it in order not to force irrelevant filename changes on the
  41 dnl maintainers.
  42 dnl
  43 AC_DEFUN([AM_WITH_NLS],
  44   [AC_MSG_CHECKING([whether NLS is requested])
  45     dnl Default is enabled NLS
  46     AC_ARG_ENABLE(nls,
  47       [  --disable-nls           do not use Native Language Support],
  48       USE_NLS=$enableval, USE_NLS=yes)
  49     AC_MSG_RESULT($USE_NLS)
  50     AC_SUBST(USE_NLS)
  51
  52     BUILD_INCLUDED_LIBINTL=no
  53     USE_INCLUDED_LIBINTL=no
  54     INTLLIBS=
  55
  56     dnl If we use NLS figure out what method
  57     if test "$USE_NLS" = "yes"; then
  58       AC_DEFINE(ENABLE_NLS, 1,
  59         [Define to 1 if translation of program messages to the user's native language
  60    is requested.])
  61       AC_MSG_CHECKING([whether included gettext is requested])
  62       AC_ARG_WITH(included-gettext,
  63         [  --with-included-gettext use the GNU gettext library included here],
  64         nls_cv_force_use_gnu_gettext=$withval,
  65         nls_cv_force_use_gnu_gettext=no)
  66       AC_MSG_RESULT($nls_cv_force_use_gnu_gettext)
  67
  68       nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
  69       if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
  70         dnl User does not insist on using GNU NLS library.  Figure out what
  71         dnl to use.  If GNU gettext is available we use this.  Else we have
  72         dnl to fall back to GNU NLS library.
  73         CATOBJEXT=NONE
  74
  75         dnl Add a version number to the cache macros.
  76         define(gt_cv_func_gnugettext_libc, [gt_cv_func_gnugettext]ifelse([$2], need-ngettext, 2, 1)[_libc])
  77         define(gt_cv_func_gnugettext_libintl, [gt_cv_func_gnugettext]ifelse([$2], need-ngettext, 2, 1)[_libintl])
  78
  79         AC_CHECK_HEADER(libintl.h,
  80           [AC_CACHE_CHECK([for GNU gettext in libc], gt_cv_func_gnugettext_libc,
  81             [AC_TRY_LINK([#include <libintl.h>
  82 extern int _nl_msg_cat_cntr;],
  83                [bindtextdomain ("", "");
  84 return (int) gettext ("")]ifelse([$2], need-ngettext, [ + (int) ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr],
  85                gt_cv_func_gnugettext_libc=yes,
  86                gt_cv_func_gnugettext_libc=no)])
  87
  88            if test "$gt_cv_func_gnugettext_libc" != "yes"; then
  89              AC_CACHE_CHECK([for GNU gettext in libintl],
  90                gt_cv_func_gnugettext_libintl,
  91                [gt_save_LIBS="$LIBS"
  92                 LIBS="$LIBS -lintl $LIBICONV"
  93                 AC_TRY_LINK([#include <libintl.h>
  94 extern int _nl_msg_cat_cntr;],
  95                   [bindtextdomain ("", "");
  96 return (int) gettext ("")]ifelse([$2], need-ngettext, [ + (int) ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr],
  97                   gt_cv_func_gnugettext_libintl=yes,
  98                   gt_cv_func_gnugettext_libintl=no)
  99                 LIBS="$gt_save_LIBS"])
 100            fi
 101
 102            dnl If an already present or preinstalled GNU gettext() is found,
 103            dnl use it.  But if this macro is used in GNU gettext, and GNU
 104            dnl gettext is already preinstalled in libintl, we update this
 105            dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
 106            if test "$gt_cv_func_gnugettext_libc" = "yes" \
 107               || { test "$gt_cv_func_gnugettext_libintl" = "yes" \
 108                    && test "$PACKAGE" != gettext; }; then
 109              AC_DEFINE(HAVE_GETTEXT, 1,
 110                [Define if the GNU gettext() function is already present or preinstalled.])
 111
 112              if test "$gt_cv_func_gnugettext_libintl" = "yes"; then
 113                dnl If iconv() is in a separate libiconv library, then anyone
 114                dnl linking with libintl{.a,.so} also needs to link with
 115                dnl libiconv.
 116                INTLLIBS="-lintl $LIBICONV"
 117              fi
 118
 119              gt_save_LIBS="$LIBS"
 120              LIBS="$LIBS $INTLLIBS"
 121              AC_CHECK_FUNCS(dcgettext)
 122              LIBS="$gt_save_LIBS"
 123
 124              dnl Search for GNU msgfmt in the PATH.
 125              AM_PATH_PROG_WITH_TEST(MSGFMT, msgfmt,
 126                [$ac_dir/$ac_word --statistics /dev/null >/dev/null 2>&1], :)
 127              AC_PATH_PROG(GMSGFMT, gmsgfmt, $MSGFMT)
 128
 129              dnl Search for GNU xgettext in the PATH.
 130              AM_PATH_PROG_WITH_TEST(XGETTEXT, xgettext,
 131                [$ac_dir/$ac_word --omit-header /dev/null >/dev/null 2>&1], :)
 132
 133              CATOBJEXT=.gmo
 134            fi
 135         ])
 136
 137         if test "$CATOBJEXT" = "NONE"; then
 138           dnl GNU gettext is not found in the C library.
 139           dnl Fall back on GNU gettext library.
 140           nls_cv_use_gnu_gettext=yes
 141         fi
 142       fi
 143
 144       if test "$nls_cv_use_gnu_gettext" = "yes"; then
 145         dnl Mark actions used to generate GNU NLS library.
 146         INTLOBJS="\$(GETTOBJS)"
 147         AM_PATH_PROG_WITH_TEST(MSGFMT, msgfmt,
 148           [$ac_dir/$ac_word --statistics /dev/null >/dev/null 2>&1], :)
 149         AC_PATH_PROG(GMSGFMT, gmsgfmt, $MSGFMT)
 150         AM_PATH_PROG_WITH_TEST(XGETTEXT, xgettext,
 151           [$ac_dir/$ac_word --omit-header /dev/null >/dev/null 2>&1], :)
 152         AC_SUBST(MSGFMT)
 153         BUILD_INCLUDED_LIBINTL=yes
 154         USE_INCLUDED_LIBINTL=yes
 155         CATOBJEXT=.gmo
 156         INTLLIBS="ifelse([$3],[],\$(top_builddir)/intl,[$3])/libintl.ifelse([$1], use-libtool, [l], [])a $LIBICONV"
 157         LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
 158       fi
 159
 160       dnl This could go away some day; the PATH_PROG_WITH_TEST already does it.
 161       dnl Test whether we really found GNU msgfmt.
 162       if test "$GMSGFMT" != ":"; then
 163         dnl If it is no GNU msgfmt we define it as : so that the
 164         dnl Makefiles still can work.
 165         if $GMSGFMT --statistics /dev/null >/dev/null 2>&1; then
 166           : ;
 167         else
 168           AC_MSG_RESULT(
 169             [found msgfmt program is not GNU msgfmt; ignore it])
 170           GMSGFMT=":"
 171         fi
 172       fi
 173
 174       dnl This could go away some day; the PATH_PROG_WITH_TEST already does it.
 175       dnl Test whether we really found GNU xgettext.
 176       if test "$XGETTEXT" != ":"; then
 177         dnl If it is no GNU xgettext we define it as : so that the
 178         dnl Makefiles still can work.
 179         if $XGETTEXT --omit-header /dev/null >/dev/null 2>&1; then
 180           : ;
 181         else
 182           AC_MSG_RESULT(
 183             [found xgettext program is not GNU xgettext; ignore it])
 184           XGETTEXT=":"
 185         fi
 186       fi
 187
 188       dnl We need to process the po/ directory.
 189       POSUB=po
 190     fi
 191     AC_OUTPUT_COMMANDS(
 192      [for ac_file in $CONFIG_FILES; do
 193         # Support "outfile[:infile[:infile...]]"
 194         case "$ac_file" in
 195           *:*) ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
 196         esac
 197         # PO directories have a Makefile.in generated from Makefile.in.in.
 198         case "$ac_file" in */Makefile.in)
 199           # Adjust a relative srcdir.
 200           ac_dir=`echo "$ac_file"|sed 's%/[^/][^/]*$%%'`
 201           ac_dir_suffix="/`echo "$ac_dir"|sed 's%^\./%%'`"
 202           ac_dots=`echo "$ac_dir_suffix"|sed 's%/[^/]*%../%g'`
 203           # In autoconf-2.13 it is called $ac_given_srcdir.
 204           # In autoconf-2.50 it is called $srcdir.
 205           test -n "$ac_given_srcdir" || ac_given_srcdir="$srcdir"
 206           case "$ac_given_srcdir" in
 207             .)  top_srcdir=`echo $ac_dots|sed 's%/$%%'` ;;
 208             /*) top_srcdir="$ac_given_srcdir" ;;
 209             *)  top_srcdir="$ac_dots$ac_given_srcdir" ;;
 210           esac
 211           if test -f "$ac_given_srcdir/$ac_dir/POTFILES.in"; then
 212             rm -f "$ac_dir/POTFILES"
 213             test -n "$as_me" && echo "$as_me: creating $ac_dir/POTFILES" || echo "creating $ac_dir/POTFILES"
 214             sed -e "/^#/d" -e "/^[      ]*\$/d" -e "s,.*,     $top_srcdir/& \\\\," -e "\$s/\(.*\) \\\\/\1/" < "$ac_given_srcdir/$ac_dir/POTFILES.in" > "$ac_dir/POTFILES"
 215             test -n "$as_me" && echo "$as_me: creating $ac_dir/Makefile" || echo "creating $ac_dir/Makefile"
 216             sed -e "/POTFILES =/r $ac_dir/POTFILES" "$ac_dir/Makefile.in" > "$ac_dir/Makefile"
 217           fi
 218           ;;
 219         esac
 220       done])
 221
 222
 223     dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
 224     dnl to 'yes' because some of the testsuite requires it.
 225     if test "$PACKAGE" = gettext; then
 226       BUILD_INCLUDED_LIBINTL=yes
 227     fi
 228
 229     dnl intl/plural.c is generated from intl/plural.y. It requires bison,
 230     dnl because plural.y uses bison specific features. It requires at least
 231     dnl bison-1.26 because earlier versions generate a plural.c that doesn't
 232     dnl compile.
 233     dnl bison is only needed for the maintainer (who touches plural.y). But in
 234     dnl order to avoid separate Makefiles or --enable-maintainer-mode, we put
 235     dnl the rule in general Makefile. Now, some people carelessly touch the
 236     dnl files or have a broken "make" program, hence the plural.c rule will
 237     dnl sometimes fire. To avoid an error, defines BISON to ":" if it is not
 238     dnl present or too old.
 239     AC_CHECK_PROGS([INTLBISON], [bison])
 240     if test -z "$INTLBISON"; then
 241       ac_verc_fail=yes
 242     else
 243       dnl Found it, now check the version.
 244       AC_MSG_CHECKING([version of bison])
 245 changequote(<<,>>)dnl
 246       ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
 247       case $ac_prog_version in
 248         '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
 249         1.2[6-9]* | 1.[3-9][0-9]* | [2-9].*)
 250 changequote([,])dnl
 251            ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
 252         *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
 253       esac
 254       AC_MSG_RESULT([$ac_prog_version])
 255     fi
 256     if test $ac_verc_fail = yes; then
 257       INTLBISON=:
 258     fi
 259
 260     dnl These rules are solely for the distribution goal.  While doing this
 261     dnl we only have to keep exactly one list of the available catalogs
 262     dnl in configure.in.
 263     for lang in $ALL_LINGUAS; do
 264       GMOFILES="$GMOFILES $lang.gmo"
 265       POFILES="$POFILES $lang.po"
 266     done
 267
 268     dnl Make all variables we use known to autoconf.
 269     AC_SUBST(BUILD_INCLUDED_LIBINTL)
 270     AC_SUBST(USE_INCLUDED_LIBINTL)
 271     AC_SUBST(CATALOGS)
 272     AC_SUBST(CATOBJEXT)
 273     AC_SUBST(GMOFILES)
 274     AC_SUBST(INTLLIBS)
 275     AC_SUBST(INTLOBJS)
 276     AC_SUBST(POFILES)
 277     AC_SUBST(POSUB)
 278
 279     dnl For backward compatibility. Some configure.ins may be using this.
 280     nls_cv_header_intl=
 281     nls_cv_header_libgt=
 282
 283     dnl For backward compatibility. Some Makefiles may be using this.
 284     DATADIRNAME=share
 285     AC_SUBST(DATADIRNAME)
 286
 287     dnl For backward compatibility. Some Makefiles may be using this.
 288     INSTOBJEXT=.mo
 289     AC_SUBST(INSTOBJEXT)
 290
 291     dnl For backward compatibility. Some Makefiles may be using this.
 292     GENCAT=gencat
 293     AC_SUBST(GENCAT)
 294   ])
 295
 296 dnl Usage: Just like AM_WITH_NLS, which see.
 297 AC_DEFUN([AM_GNU_GETTEXT],
 298   [AC_REQUIRE([AC_PROG_MAKE_SET])dnl
 299    AC_REQUIRE([AC_PROG_CC])dnl
 300    AC_REQUIRE([AC_CANONICAL_HOST])dnl
 301    AC_REQUIRE([AC_PROG_RANLIB])dnl
 302    AC_REQUIRE([AC_ISC_POSIX])dnl
 303    AC_REQUIRE([AC_HEADER_STDC])dnl
 304    AC_REQUIRE([AC_C_CONST])dnl
 305    AC_REQUIRE([AC_C_INLINE])dnl
 306    AC_REQUIRE([AC_TYPE_OFF_T])dnl
 307    AC_REQUIRE([AC_TYPE_SIZE_T])dnl
 308    AC_REQUIRE([AC_FUNC_ALLOCA])dnl
 309    AC_REQUIRE([AC_FUNC_MMAP])dnl
 310    AC_REQUIRE([jm_GLIBC21])dnl
 311
 312    AC_CHECK_HEADERS([argz.h limits.h locale.h nl_types.h malloc.h stddef.h \
 313 stdlib.h string.h unistd.h sys/param.h])
 314    AC_CHECK_FUNCS([feof_unlocked fgets_unlocked getcwd getegid geteuid \
 315 getgid getuid mempcpy munmap putenv setenv setlocale stpcpy strchr strcasecmp \
 316 strdup strtoul tsearch __argz_count __argz_stringify __argz_next])
 317
 318    AM_ICONV
 319    AM_LANGINFO_CODESET
 320    AM_LC_MESSAGES
 321    AM_WITH_NLS([$1],[$2],[$3])
 322
 323    if test "x$CATOBJEXT" != "x"; then
 324      if test "x$ALL_LINGUAS" = "x"; then
 325        LINGUAS=
 326      else
 327        AC_MSG_CHECKING(for catalogs to be installed)
 328        NEW_LINGUAS=
 329        for presentlang in $ALL_LINGUAS; do
 330          useit=no
 331          for desiredlang in ${LINGUAS-$ALL_LINGUAS}; do
 332            # Use the presentlang catalog if desiredlang is
 333            #   a. equal to presentlang, or
 334            #   b. a variant of presentlang (because in this case,
 335            #      presentlang can be used as a fallback for messages
 336            #      which are not translated in the desiredlang catalog).
 337            case "$desiredlang" in
 338              "$presentlang"*) useit=yes;;
 339            esac
 340          done
 341          if test $useit = yes; then
 342            NEW_LINGUAS="$NEW_LINGUAS $presentlang"
 343          fi
 344        done
 345        LINGUAS=$NEW_LINGUAS
 346        AC_MSG_RESULT($LINGUAS)
 347      fi
 348
 349      dnl Construct list of names of catalog files to be constructed.
 350      if test -n "$LINGUAS"; then
 351        for lang in $LINGUAS; do CATALOGS="$CATALOGS $lang$CATOBJEXT"; done
 352      fi
 353    fi
 354
 355    dnl If the AC_CONFIG_AUX_DIR macro for autoconf is used we possibly
 356    dnl find the mkinstalldirs script in another subdir but $(top_srcdir).
 357    dnl Try to locate is.
 358    MKINSTALLDIRS=
 359    if test -n "$ac_aux_dir"; then
 360      MKINSTALLDIRS="$ac_aux_dir/mkinstalldirs"
 361    fi
 362    if test -z "$MKINSTALLDIRS"; then
 363      MKINSTALLDIRS="\$(top_srcdir)/mkinstalldirs"
 364    fi
 365    AC_SUBST(MKINSTALLDIRS)
 366
 367    dnl Enable libtool support if the surrounding package wishes it.
 368    INTL_LIBTOOL_SUFFIX_PREFIX=ifelse([$1], use-libtool, [l], [])
 369    AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
 370   ])