1# gettext.m4 serial 20 (gettext-0.12)
2dnl Copyright (C) 1995-2003 Free Software Foundation, Inc.
3dnl This file is free software, distributed under the terms of the GNU
4dnl General Public License.  As a special exception to the GNU General
5dnl Public License, this file may be distributed as part of a program
6dnl that contains a configuration script generated by Autoconf, under
7dnl the same distribution terms as the rest of that program.
8dnl
9dnl This file can can be used in projects which are not available under
10dnl the GNU General Public License or the GNU Library General Public
11dnl License but which still want to provide support for the GNU gettext
12dnl functionality.
13dnl Please note that the actual code of the GNU gettext library is covered
14dnl by the GNU Library General Public License, and the rest of the GNU
15dnl gettext package package is covered by the GNU General Public License.
16dnl They are *not* in the public domain.
17
18dnl Authors:
19dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
20dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2003.
21
22dnl Macro to add for using GNU gettext.
23
24dnl Usage: AM_GNU_GETTEXT([INTLSYMBOL], [NEEDSYMBOL], [INTLDIR]).
25dnl INTLSYMBOL can be one of 'external', 'no-libtool', 'use-libtool'. The
26dnl    default (if it is not specified or empty) is 'no-libtool'.
27dnl    INTLSYMBOL should be 'external' for packages with no intl directory,
28dnl    and 'no-libtool' or 'use-libtool' for packages with an intl directory.
29dnl    If INTLSYMBOL is 'use-libtool', then a libtool library
30dnl    $(top_builddir)/intl/libintl.la will be created (shared and/or static,
31dnl    depending on --{enable,disable}-{shared,static} and on the presence of
32dnl    AM-DISABLE-SHARED). If INTLSYMBOL is 'no-libtool', a static library
33dnl    $(top_builddir)/intl/libintl.a will be created.
34dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
35dnl    implementations (in libc or libintl) without the ngettext() function
36dnl    will be ignored.  If NEEDSYMBOL is specified and is
37dnl    'need-formatstring-macros', then GNU gettext implementations that don't
38dnl    support the ISO C 99 <inttypes.h> formatstring macros will be ignored.
39dnl INTLDIR is used to find the intl libraries.  If empty,
40dnl    the value `$(top_builddir)/intl/' is used.
41dnl
42dnl The result of the configuration is one of three cases:
43dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled
44dnl    and used.
45dnl    Catalog format: GNU --> install in $(datadir)
46dnl    Catalog extension: .mo after installation, .gmo in source tree
47dnl 2) GNU gettext has been found in the system's C library.
48dnl    Catalog format: GNU --> install in $(datadir)
49dnl    Catalog extension: .mo after installation, .gmo in source tree
50dnl 3) No internationalization, always use English msgid.
51dnl    Catalog format: none
52dnl    Catalog extension: none
53dnl If INTLSYMBOL is 'external', only cases 2 and 3 can occur.
54dnl The use of .gmo is historical (it was needed to avoid overwriting the
55dnl GNU format catalogs when building on a platform with an X/Open gettext),
56dnl but we keep it in order not to force irrelevant filename changes on the
57dnl maintainers.
58dnl
59AC_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 "$gt_cv_func_gnugettext_libc" != "yes"; then
84  dnl tests. But if configure.ac invokes AM_ICONV after AM_GNU_GETTEXT
85  dnl the configure script would need to contain the same shell code
86  dnl again, outside any 'if'. There are two solutions:
87  dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
88  dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.
89  dnl Since AC_PROVIDE_IFELSE is only in autoconf >= 2.52 and not
90  dnl documented, we avoid it.
91  ifelse(gt_included_intl, yes, , [
92    AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
93  ])
94
95  dnl Set USE_NLS.
96  AM_NLS
97
98  ifelse(gt_included_intl, yes, [
99    BUILD_INCLUDED_LIBINTL=no
100    USE_INCLUDED_LIBINTL=no
101  ])
102  LIBINTL=
103  LTLIBINTL=
104  POSUB=
105
106  dnl If we use NLS figure out what method
107  if test "$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
135changequote(,)dnl
136typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
137changequote([,])dnl
138], [])[extern int _nl_msg_cat_cntr;
139extern int *_nl_domain_bindings;],
140            [bindtextdomain ("", "");
141return (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
167changequote(,)dnl
168typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
169changequote([,])dnl
170], [])[extern int _nl_msg_cat_cntr;
171extern
172#ifdef __cplusplus
173"C"
174#endif
175const char *_nl_expand_alias ();],
176              [bindtextdomain ("", "");
177return (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
188changequote(,)dnl
189typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
190changequote([,])dnl
191], [])[extern int _nl_msg_cat_cntr;
192extern
193#ifdef __cplusplus
194"C"
195#endif
196const char *_nl_expand_alias ();],
197                [bindtextdomain ("", "");
198return (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 "$PACKAGE" = gettext-tools; then
298      BUILD_INCLUDED_LIBINTL=yes
299    fi
300
301    dnl Make all variables we use known to autoconf.
302    AC_SUBST(BUILD_INCLUDED_LIBINTL)
303    AC_SUBST(USE_INCLUDED_LIBINTL)
304    AC_SUBST(CATOBJEXT)
305
306    dnl For backward compatibility. Some configure.acs may be using this.
307    nls_cv_header_intl=
308    nls_cv_header_libgt=
309
310    dnl For backward compatibility. Some Makefiles may be using this.
311    DATADIRNAME=share
312    AC_SUBST(DATADIRNAME)
313
314    dnl For backward compatibility. Some Makefiles may be using this.
315    INSTOBJEXT=.mo
316    AC_SUBST(INSTOBJEXT)
317
318    dnl For backward compatibility. Some Makefiles may be using this.
319    GENCAT=gencat
320    AC_SUBST(GENCAT)
321
322    dnl For backward compatibility. Some Makefiles may be using this.
323    if test "$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
344dnl Checks for all prerequisites of the intl subdirectory,
345dnl except for INTL_LIBTOOL_SUFFIX_PREFIX (and possibly LIBTOOL), INTLOBJS,
346dnl            USE_INCLUDED_LIBINTL, BUILD_INCLUDED_LIBINTL.
347AC_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 \
369stdlib.h string.h unistd.h sys/param.h])
370  AC_CHECK_FUNCS([feof_unlocked fgets_unlocked getc_unlocked getcwd getegid \
371geteuid getgid getuid mempcpy munmap putenv setenv setlocale stpcpy \
372strcasecmp 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])
397changequote(<<,>>)dnl
398    ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
399    case $ac_prog_version in
400      '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
401      1.2[6-9]* | 1.[3-9][0-9]* | [2-9].*)
402changequote([,])dnl
403         ac_prog_version="$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
414dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
415AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])
416