config/gettext.m4

   1 # gettext.m4 serial 20 (gettext-0.12)
   2 dnl Copyright (C) 1995-2003 Free Software Foundation, Inc.
   3 dnl This file is free software, distributed under the terms of the GNU
   4 dnl General Public License.  As a special exception to the GNU General
   5 dnl Public License, this file may be distributed as part of a program
   6 dnl that contains a configuration script generated by Autoconf, under
   7 dnl the same distribution terms as the rest of that program.
   8 dnl
   9 dnl This file can can be used in projects which are not available under
  10 dnl the GNU General Public License or the GNU Library General Public
  11 dnl License but which still want to provide support for the GNU gettext
  12 dnl functionality.
  13 dnl Please note that the actual code of the GNU gettext library is covered
  14 dnl by the GNU Library General Public License, and the rest of the GNU
  15 dnl gettext package package is covered by the GNU General Public License.
  16 dnl They are *not* in the public domain.
  17
  18 dnl Authors:
  19 dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
  20 dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2003.
  21
  22 dnl Macro to add for using GNU gettext.
  23
  24 dnl Usage: AM_GNU_GETTEXT([INTLSYMBOL], [NEEDSYMBOL], [INTLDIR]).
  25 dnl INTLSYMBOL can be one of 'external', 'no-libtool', 'use-libtool'. The
  26 dnl    default (if it is not specified or empty) is 'no-libtool'.
  27 dnl    INTLSYMBOL should be 'external' for packages with no intl directory,
  28 dnl    and 'no-libtool' or 'use-libtool' for packages with an intl directory.
  29 dnl    If INTLSYMBOL is 'use-libtool', then a libtool library
  30 dnl    $(top_builddir)/intl/libintl.la will be created (shared and/or static,
  31 dnl    depending on --{enable,disable}-{shared,static} and on the presence of
  32 dnl    AM-DISABLE-SHARED). If INTLSYMBOL is 'no-libtool', a static library
  33 dnl    $(top_builddir)/intl/libintl.a will be created.
  34 dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
  35 dnl    implementations (in libc or libintl) without the ngettext() function
  36 dnl    will be ignored.  If NEEDSYMBOL is specified and is
  37 dnl    'need-formatstring-macros', then GNU gettext implementations that don't
  38 dnl    support the ISO C 99 <inttypes.h> formatstring macros will be ignored.
  39 dnl INTLDIR is used to find the intl libraries.  If empty,
  40 dnl    the value `$(top_builddir)/intl/' is used.
  41 dnl
  42 dnl The result of the configuration is one of three cases:
  43 dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled
  44 dnl    and used.
  45 dnl    Catalog format: GNU --> install in $(datadir)
  46 dnl    Catalog extension: .mo after installation, .gmo in source tree
  47 dnl 2) GNU gettext has been found in the system's C library.
  48 dnl    Catalog format: GNU --> install in $(datadir)
  49 dnl    Catalog extension: .mo after installation, .gmo in source tree
  50 dnl 3) No internationalization, always use English msgid.
  51 dnl    Catalog format: none
  52 dnl    Catalog extension: none
  53 dnl If INTLSYMBOL is 'external', only cases 2 and 3 can occur.
  54 dnl The use of .gmo is historical (it was needed to avoid overwriting the
  55 dnl GNU format catalogs when building on a platform with an X/Open gettext),
  56 dnl but we keep it in order not to force irrelevant filename changes on the
  57 dnl maintainers.
  58 dnl
  59 AC_DEFUN([AM_GNU_GETTEXT],
  60 [
  61   dnl Argument checking.
  62   ifelse([$1], [], , [ifelse([$1], [external], , [ifelse([$1], [no-libtool], , [ifelse([$1], [use-libtool], ,
  63     [errprint([ERROR: invalid first argument to AM_GNU_GETTEXT
  64 ])])])])])
  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, ifelse([$1], [external], [no], [yes]))
  69   define(gt_libtool_suffix_prefix, ifelse([$1], [use-libtool], [l], []))
  70
  71   AC_REQUIRE([AM_PO_SUBDIRS])dnl
  72   ifelse(gt_included_intl, yes, [
  73     AC_REQUIRE([AM_INTL_SUBDIR])dnl
  74   ])
  75
  76   dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
  77   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
  78   AC_REQUIRE([AC_LIB_RPATH])
  79
  80   dnl Sometimes libintl requires libiconv, so first search for libiconv.
  81   dnl Ideally we would do this search only after the
  82   dnl      if test "$USE_NLS" = "yes"; then
  83   dnl        if test "$gt_cv_func_gnugettext_libc" != "yes"; then
  84   dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT
  85   dnl the configure script would need to contain the same shell code
  86   dnl again, outside any 'if'. There are two solutions:
  87   dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
  88   dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.
  89   dnl Since AC_PROVIDE_IFELSE is only in autoconf >= 2.52 and not
  90   dnl documented, we avoid it.
  91   ifelse(gt_included_intl, yes, , [
  92     AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
  93   ])
  94
  95   dnl Set USE_NLS.
  96   AM_NLS
  97
  98   ifelse(gt_included_intl, yes, [
  99     BUILD_INCLUDED_LIBINTL=no
 100     USE_INCLUDED_LIBINTL=no
 101   ])
 102   LIBINTL=
 103   LTLIBINTL=
 104   POSUB=
 105
 106   dnl If we use NLS figure out what method
 107   if test "$USE_NLS" = "yes"; then
 108     gt_use_preinstalled_gnugettext=no
 109     ifelse(gt_included_intl, yes, [
 110       AC_MSG_CHECKING([whether included gettext is requested])
 111       AC_ARG_WITH(included-gettext,
 112         [  --with-included-gettext use the GNU gettext library included here],
 113         nls_cv_force_use_gnu_gettext=$withval,
 114         nls_cv_force_use_gnu_gettext=no)
 115       AC_MSG_RESULT($nls_cv_force_use_gnu_gettext)
 116
 117       nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
 118       if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
 119     ])
 120         dnl User does not insist on using GNU NLS library.  Figure out what
 121         dnl to use.  If GNU gettext is available we use this.  Else we have
 122         dnl to fall back to GNU NLS library.
 123
 124         dnl Add a version number to the cache macros.
 125         define([gt_api_version], ifelse([$2], [need-formatstring-macros], 3, ifelse([$2], [need-ngettext], 2, 1)))
 126         define([gt_cv_func_gnugettext_libc], [gt_cv_func_gnugettext]gt_api_version[_libc])
 127         define([gt_cv_func_gnugettext_libintl], [gt_cv_func_gnugettext]gt_api_version[_libintl])
 128
 129         AC_CACHE_CHECK([for GNU gettext in libc], gt_cv_func_gnugettext_libc,
 130          [AC_TRY_LINK([#include <libintl.h>
 131 ]ifelse([$2], [need-formatstring-macros],
 132 [#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
 133 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
 134 #endif
 135 changequote(,)dnl
 136 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
 137 changequote([,])dnl
 138 ], [])[extern int _nl_msg_cat_cntr;
 139 extern int *_nl_domain_bindings;],
 140             [bindtextdomain ("", "");
 141 return (int) gettext ("")]ifelse([$2], [need-ngettext], [ + (int) ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr + *_nl_domain_bindings],
 142             gt_cv_func_gnugettext_libc=yes,
 143             gt_cv_func_gnugettext_libc=no)])
 144
 145         if test "$gt_cv_func_gnugettext_libc" != "yes"; then
 146           dnl Sometimes libintl requires libiconv, so first search for libiconv.
 147           ifelse(gt_included_intl, yes, , [
 148             AM_ICONV_LINK
 149           ])
 150           dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
 151           dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
 152           dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
 153           dnl even if libiconv doesn't exist.
 154           AC_LIB_LINKFLAGS_BODY([intl])
 155           AC_CACHE_CHECK([for GNU gettext in libintl],
 156             gt_cv_func_gnugettext_libintl,
 157            [gt_save_CPPFLAGS="$CPPFLAGS"
 158             CPPFLAGS="$CPPFLAGS $INCINTL"
 159             gt_save_LIBS="$LIBS"
 160             LIBS="$LIBS $LIBINTL"
 161             dnl Now see whether libintl exists and does not depend on libiconv.
 162             AC_TRY_LINK([#include <libintl.h>
 163 ]ifelse([$2], [need-formatstring-macros],
 164 [#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
 165 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
 166 #endif
 167 changequote(,)dnl
 168 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
 169 changequote([,])dnl
 170 ], [])[extern int _nl_msg_cat_cntr;
 171 extern
 172 #ifdef __cplusplus
 173 "C"
 174 #endif
 175 const char *_nl_expand_alias ();],
 176               [bindtextdomain ("", "");
 177 return (int) gettext ("")]ifelse([$2], [need-ngettext], [ + (int) ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr + *_nl_expand_alias (0)],
 178               gt_cv_func_gnugettext_libintl=yes,
 179               gt_cv_func_gnugettext_libintl=no)
 180             dnl Now see whether libintl exists and depends on libiconv.
 181             if test "$gt_cv_func_gnugettext_libintl" != yes && test -n "$LIBICONV"; then
 182               LIBS="$LIBS $LIBICONV"
 183               AC_TRY_LINK([#include <libintl.h>
 184 ]ifelse([$2], [need-formatstring-macros],
 185 [#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
 186 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
 187 #endif
 188 changequote(,)dnl
 189 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
 190 changequote([,])dnl
 191 ], [])[extern int _nl_msg_cat_cntr;
 192 extern
 193 #ifdef __cplusplus
 194 "C"
 195 #endif
 196 const char *_nl_expand_alias ();],
 197                 [bindtextdomain ("", "");
 198 return (int) gettext ("")]ifelse([$2], [need-ngettext], [ + (int) ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr + *_nl_expand_alias (0)],
 199                [LIBINTL="$LIBINTL $LIBICONV"
 200                 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
 201                 gt_cv_func_gnugettext_libintl=yes
 202                ])
 203             fi
 204             CPPFLAGS="$gt_save_CPPFLAGS"
 205             LIBS="$gt_save_LIBS"])
 206         fi
 207
 208         dnl If an already present or preinstalled GNU gettext() is found,
 209         dnl use it.  But if this macro is used in GNU gettext, and GNU
 210         dnl gettext is already preinstalled in libintl, we update this
 211         dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
 212         if test "$gt_cv_func_gnugettext_libc" = "yes" \
 213            || { test "$gt_cv_func_gnugettext_libintl" = "yes" \
 214                 && test "$PACKAGE" != gettext-runtime \
 215                 && test "$PACKAGE" != gettext-tools; }; then
 216           gt_use_preinstalled_gnugettext=yes
 217         else
 218           dnl Reset the values set by searching for libintl.
 219           LIBINTL=
 220           LTLIBINTL=
 221           INCINTL=
 222         fi
 223
 224     ifelse(gt_included_intl, yes, [
 225         if test "$gt_use_preinstalled_gnugettext" != "yes"; then
 226           dnl GNU gettext is not found in the C library.
 227           dnl Fall back on included GNU gettext library.
 228           nls_cv_use_gnu_gettext=yes
 229         fi
 230       fi
 231
 232       if test "$nls_cv_use_gnu_gettext" = "yes"; then
 233         dnl Mark actions used to generate GNU NLS library.
 234         BUILD_INCLUDED_LIBINTL=yes
 235         USE_INCLUDED_LIBINTL=yes
 236         LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV"
 237         LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV"
 238         LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
 239       fi
 240
 241       if test "$gt_use_preinstalled_gnugettext" = "yes" \
 242          || test "$nls_cv_use_gnu_gettext" = "yes"; then
 243         dnl Mark actions to use GNU gettext tools.
 244         CATOBJEXT=.gmo
 245       fi
 246     ])
 247
 248     if test "$gt_use_preinstalled_gnugettext" = "yes" \
 249        || test "$nls_cv_use_gnu_gettext" = "yes"; then
 250       AC_DEFINE(ENABLE_NLS, 1,
 251         [Define to 1 if translation of program messages to the user's native language
 252    is requested.])
 253     else
 254       USE_NLS=no
 255     fi
 256   fi
 257
 258   AC_MSG_CHECKING([whether to use NLS])
 259   AC_MSG_RESULT([$USE_NLS])
 260   if test "$USE_NLS" = "yes"; then
 261     AC_MSG_CHECKING([where the gettext function comes from])
 262     if test "$gt_use_preinstalled_gnugettext" = "yes"; then
 263       if test "$gt_cv_func_gnugettext_libintl" = "yes"; then
 264         gt_source="external libintl"
 265       else
 266         gt_source="libc"
 267       fi
 268     else
 269       gt_source="included intl directory"
 270     fi
 271     AC_MSG_RESULT([$gt_source])
 272   fi
 273
 274   if test "$USE_NLS" = "yes"; then
 275
 276     if test "$gt_use_preinstalled_gnugettext" = "yes"; then
 277       if test "$gt_cv_func_gnugettext_libintl" = "yes"; then
 278         AC_MSG_CHECKING([how to link with libintl])
 279         AC_MSG_RESULT([$LIBINTL])
 280         AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
 281       fi
 282
 283       dnl For backward compatibility. Some packages may be using this.
 284       AC_DEFINE(HAVE_GETTEXT, 1,
 285        [Define if the GNU gettext() function is already present or preinstalled.])
 286       AC_DEFINE(HAVE_DCGETTEXT, 1,
 287        [Define if the GNU dcgettext() function is already present or preinstalled.])
 288     fi
 289
 290     dnl We need to process the po/ directory.
 291     POSUB=po
 292   fi
 293
 294   ifelse(gt_included_intl, yes, [
 295     dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
 296     dnl to 'yes' because some of the testsuite requires it.
 297     if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
 298       BUILD_INCLUDED_LIBINTL=yes
 299     fi
 300
 301     dnl Make all variables we use known to autoconf.
 302     AC_SUBST(BUILD_INCLUDED_LIBINTL)
 303     AC_SUBST(USE_INCLUDED_LIBINTL)
 304     AC_SUBST(CATOBJEXT)
 305
 306     dnl For backward compatibility. Some configure.ins may be using this.
 307     nls_cv_header_intl=
 308     nls_cv_header_libgt=
 309
 310     dnl For backward compatibility. Some Makefiles may be using this.
 311     DATADIRNAME=share
 312     AC_SUBST(DATADIRNAME)
 313
 314     dnl For backward compatibility. Some Makefiles may be using this.
 315     INSTOBJEXT=.mo
 316     AC_SUBST(INSTOBJEXT)
 317
 318     dnl For backward compatibility. Some Makefiles may be using this.
 319     GENCAT=gencat
 320     AC_SUBST(GENCAT)
 321
 322     dnl For backward compatibility. Some Makefiles may be using this.
 323     if test "$USE_INCLUDED_LIBINTL" = yes; then
 324       INTLOBJS="\$(GETTOBJS)"
 325     fi
 326     AC_SUBST(INTLOBJS)
 327
 328     dnl Enable libtool support if the surrounding package wishes it.
 329     INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
 330     AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
 331   ])
 332
 333   dnl For backward compatibility. Some Makefiles may be using this.
 334   INTLLIBS="$LIBINTL"
 335   AC_SUBST(INTLLIBS)
 336
 337   dnl Make all documented variables known to autoconf.
 338   AC_SUBST(LIBINTL)
 339   AC_SUBST(LTLIBINTL)
 340   AC_SUBST(POSUB)
 341 ])
 342
 343
 344 dnl Checks for all prerequisites of the intl subdirectory,
 345 dnl except for INTL_LIBTOOL_SUFFIX_PREFIX (and possibly LIBTOOL), INTLOBJS,
 346 dnl            USE_INCLUDED_LIBINTL, BUILD_INCLUDED_LIBINTL.
 347 AC_DEFUN([AM_INTL_SUBDIR],
 348 [
 349   AC_REQUIRE([AC_PROG_INSTALL])dnl
 350   AC_REQUIRE([AM_MKINSTALLDIRS])dnl
 351   AC_REQUIRE([AC_PROG_CC])dnl
 352   AC_REQUIRE([AC_CANONICAL_HOST])dnl
 353   AC_REQUIRE([AC_PROG_RANLIB])dnl
 354   AC_REQUIRE([AC_ISC_POSIX])dnl
 355   AC_REQUIRE([AC_HEADER_STDC])dnl
 356   AC_REQUIRE([AC_C_CONST])dnl
 357   AC_REQUIRE([AC_C_INLINE])dnl
 358   AC_REQUIRE([AC_TYPE_OFF_T])dnl
 359   AC_REQUIRE([AC_TYPE_SIZE_T])dnl
 360   AC_REQUIRE([AC_FUNC_ALLOCA])dnl
 361   AC_REQUIRE([AC_FUNC_MMAP])dnl
 362   AC_REQUIRE([jm_GLIBC21])dnl
 363   AC_REQUIRE([gt_INTDIV0])dnl
 364   AC_REQUIRE([jm_AC_TYPE_UINTMAX_T])dnl
 365   AC_REQUIRE([gt_HEADER_INTTYPES_H])dnl
 366   AC_REQUIRE([gt_INTTYPES_PRI])dnl
 367
 368   AC_CHECK_HEADERS([argz.h limits.h locale.h nl_types.h malloc.h stddef.h \
 369 stdlib.h string.h unistd.h sys/param.h])
 370   AC_CHECK_FUNCS([feof_unlocked fgets_unlocked getc_unlocked getcwd getegid \
 371 geteuid getgid getuid mempcpy munmap putenv setenv setlocale stpcpy \
 372 strcasecmp strdup strtoul tsearch __argz_count __argz_stringify __argz_next \
 373 __fsetlocking])
 374
 375   AM_ICONV
 376   AM_LANGINFO_CODESET
 377   if test $ac_cv_header_locale_h = yes; then
 378     AM_LC_MESSAGES
 379   fi
 380
 381   dnl intl/plural.c is generated from intl/plural.y. It requires bison,
 382   dnl because plural.y uses bison specific features. It requires at least
 383   dnl bison-1.26 because earlier versions generate a plural.c that doesn't
 384   dnl compile.
 385   dnl bison is only needed for the maintainer (who touches plural.y). But in
 386   dnl order to avoid separate Makefiles or --enable-maintainer-mode, we put
 387   dnl the rule in general Makefile. Now, some people carelessly touch the
 388   dnl files or have a broken "make" program, hence the plural.c rule will
 389   dnl sometimes fire. To avoid an error, defines BISON to ":" if it is not
 390   dnl present or too old.
 391   AC_CHECK_PROGS([INTLBISON], [bison])
 392   if test -z "$INTLBISON"; then
 393     ac_verc_fail=yes
 394   else
 395     dnl Found it, now check the version.
 396     AC_MSG_CHECKING([version of bison])
 397 changequote(<<,>>)dnl
 398     ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
 399     case $ac_prog_version in
 400       '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
 401       1.2[6-9]* | 1.[3-9][0-9]* | [2-9].*)
 402 changequote([,])dnl
 403          ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
 404       *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
 405     esac
 406     AC_MSG_RESULT([$ac_prog_version])
 407   fi
 408   if test $ac_verc_fail = yes; then
 409     INTLBISON=:
 410   fi
 411 ])
 412
 413
 414 dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
 415 AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])