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#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
132extern int _nl_msg_cat_cntr;
133extern int *_nl_domain_bindings;
134#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_domain_bindings)
135#else
136#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
137#endif
138]ifelse([$2], [need-formatstring-macros],
139[#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
140#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
141#endif
142changequote(,)dnl
143typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
144changequote([,])dnl
145], []),
146            [bindtextdomain ("", "");
147return (int) gettext ("")]ifelse([$2], [need-ngettext], [ + (int) ngettext ("", "", 0)], [])[ + __GNU_GETTEXT_SYMBOL_EXPRESSION],
148            gt_cv_func_gnugettext_libc=yes,
149            gt_cv_func_gnugettext_libc=no)])
150
151        if test "$gt_cv_func_gnugettext_libc" != "yes"; then
152          dnl Sometimes libintl requires libiconv, so first search for libiconv.
153          ifelse(gt_included_intl, yes, , [
154            AM_ICONV_LINK
155          ])
156          dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
157          dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
158          dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
159          dnl even if libiconv doesn't exist.
160          AC_LIB_LINKFLAGS_BODY([intl])
161          AC_CACHE_CHECK([for GNU gettext in libintl],
162            gt_cv_func_gnugettext_libintl,
163           [gt_save_CPPFLAGS="$CPPFLAGS"
164            CPPFLAGS="$CPPFLAGS $INCINTL"
165            gt_save_LIBS="$LIBS"
166            LIBS="$LIBS $LIBINTL"
167            dnl Now see whether libintl exists and does not depend on libiconv.
168            AC_TRY_LINK([#include <libintl.h>
169#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
170extern int _nl_msg_cat_cntr;
171extern
172#ifdef __cplusplus
173"C"
174#endif
175const char *_nl_expand_alias ();
176#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (0))
177#else
178#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
179#endif
180]ifelse([$2], [need-formatstring-macros],
181[#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
182#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
183#endif
184changequote(,)dnl
185typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
186changequote([,])dnl
187], []),
188              [bindtextdomain ("", "");
189return (int) gettext ("")]ifelse([$2], [need-ngettext], [ + (int) ngettext ("", "", 0)], [])[ + __GNU_GETTEXT_SYMBOL_EXPRESSION],
190              gt_cv_func_gnugettext_libintl=yes,
191              gt_cv_func_gnugettext_libintl=no)
192            dnl Now see whether libintl exists and depends on libiconv.
193            if test "$gt_cv_func_gnugettext_libintl" != yes && test -n "$LIBICONV"; then
194              LIBS="$LIBS $LIBICONV"
195              AC_TRY_LINK([#include <libintl.h>
196#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
197extern int _nl_msg_cat_cntr;
198extern
199#ifdef __cplusplus
200"C"
201#endif
202const char *_nl_expand_alias ();
203#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (0))
204#else
205#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
206#endif
207]ifelse([$2], [need-formatstring-macros],
208[#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
209#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
210#endif
211changequote(,)dnl
212typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
213changequote([,])dnl
214], []),
215                [bindtextdomain ("", "");
216return (int) gettext ("")]ifelse([$2], [need-ngettext], [ + (int) ngettext ("", "", 0)], [])[ + __GNU_GETTEXT_SYMBOL_EXPRESSION],
217               [LIBINTL="$LIBINTL $LIBICONV"
218                LTLIBINTL="$LTLIBINTL $LTLIBICONV"
219                gt_cv_func_gnugettext_libintl=yes
220               ])
221            fi
222            CPPFLAGS="$gt_save_CPPFLAGS"
223            LIBS="$gt_save_LIBS"])
224        fi
225
226        dnl If an already present or preinstalled GNU gettext() is found,
227        dnl use it.  But if this macro is used in GNU gettext, and GNU
228        dnl gettext is already preinstalled in libintl, we update this
229        dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
230        if test "$gt_cv_func_gnugettext_libc" = "yes" \
231           || { test "$gt_cv_func_gnugettext_libintl" = "yes" \
232                && test "$PACKAGE" != gettext-runtime \
233                && test "$PACKAGE" != gettext-tools; }; then
234          gt_use_preinstalled_gnugettext=yes
235        else
236          dnl Reset the values set by searching for libintl.
237          LIBINTL=
238          LTLIBINTL=
239          INCINTL=
240        fi
241
242    ifelse(gt_included_intl, yes, [
243        if test "$gt_use_preinstalled_gnugettext" != "yes"; then
244          dnl GNU gettext is not found in the C library.
245          dnl Fall back on included GNU gettext library.
246          nls_cv_use_gnu_gettext=yes
247        fi
248      fi
249
250      if test "$nls_cv_use_gnu_gettext" = "yes"; then
251        dnl Mark actions used to generate GNU NLS library.
252        BUILD_INCLUDED_LIBINTL=yes
253        USE_INCLUDED_LIBINTL=yes
254        LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV"
255        LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV"
256        LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
257      fi
258
259      if test "$gt_use_preinstalled_gnugettext" = "yes" \
260         || test "$nls_cv_use_gnu_gettext" = "yes"; then
261        dnl Mark actions to use GNU gettext tools.
262        CATOBJEXT=.gmo
263      fi
264    ])
265
266    if test "$gt_use_preinstalled_gnugettext" = "yes" \
267       || test "$nls_cv_use_gnu_gettext" = "yes"; then
268      AC_DEFINE(ENABLE_NLS, 1,
269        [Define to 1 if translation of program messages to the user's native language
270   is requested.])
271    else
272      USE_NLS=no
273    fi
274  fi
275
276  AC_MSG_CHECKING([whether to use NLS])
277  AC_MSG_RESULT([$USE_NLS])
278  if test "$USE_NLS" = "yes"; then
279    AC_MSG_CHECKING([where the gettext function comes from])
280    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
281      if test "$gt_cv_func_gnugettext_libintl" = "yes"; then
282        gt_source="external libintl"
283      else
284        gt_source="libc"
285      fi
286    else
287      gt_source="included intl directory"
288    fi
289    AC_MSG_RESULT([$gt_source])
290  fi
291
292  if test "$USE_NLS" = "yes"; then
293
294    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
295      if test "$gt_cv_func_gnugettext_libintl" = "yes"; then
296        AC_MSG_CHECKING([how to link with libintl])
297        AC_MSG_RESULT([$LIBINTL])
298        AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
299      fi
300
301      dnl For backward compatibility. Some packages may be using this.
302      AC_DEFINE(HAVE_GETTEXT, 1,
303       [Define if the GNU gettext() function is already present or preinstalled.])
304      AC_DEFINE(HAVE_DCGETTEXT, 1,
305       [Define if the GNU dcgettext() function is already present or preinstalled.])
306    fi
307
308    dnl We need to process the po/ directory.
309    POSUB=po
310  fi
311
312  ifelse(gt_included_intl, yes, [
313    dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
314    dnl to 'yes' because some of the testsuite requires it.
315    if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
316      BUILD_INCLUDED_LIBINTL=yes
317    fi
318
319    dnl Make all variables we use known to autoconf.
320    AC_SUBST(BUILD_INCLUDED_LIBINTL)
321    AC_SUBST(USE_INCLUDED_LIBINTL)
322    AC_SUBST(CATOBJEXT)
323
324    dnl For backward compatibility. Some configure.acs may be using this.
325    nls_cv_header_intl=
326    nls_cv_header_libgt=
327
328    dnl For backward compatibility. Some Makefiles may be using this.
329    DATADIRNAME=share
330    AC_SUBST(DATADIRNAME)
331
332    dnl For backward compatibility. Some Makefiles may be using this.
333    INSTOBJEXT=.mo
334    AC_SUBST(INSTOBJEXT)
335
336    dnl For backward compatibility. Some Makefiles may be using this.
337    GENCAT=gencat
338    AC_SUBST(GENCAT)
339
340    dnl For backward compatibility. Some Makefiles may be using this.
341    if test "$USE_INCLUDED_LIBINTL" = yes; then
342      INTLOBJS="\$(GETTOBJS)"
343    fi
344    AC_SUBST(INTLOBJS)
345
346    dnl Enable libtool support if the surrounding package wishes it.
347    INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
348    AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
349  ])
350
351  dnl For backward compatibility. Some Makefiles may be using this.
352  INTLLIBS="$LIBINTL"
353  AC_SUBST(INTLLIBS)
354
355  dnl Make all documented variables known to autoconf.
356  AC_SUBST(LIBINTL)
357  AC_SUBST(LTLIBINTL)
358  AC_SUBST(POSUB)
359])
360
361
362dnl Checks for all prerequisites of the intl subdirectory,
363dnl except for INTL_LIBTOOL_SUFFIX_PREFIX (and possibly LIBTOOL), INTLOBJS,
364dnl            USE_INCLUDED_LIBINTL, BUILD_INCLUDED_LIBINTL.
365AC_DEFUN([AM_INTL_SUBDIR],
366[
367  AC_REQUIRE([AC_PROG_INSTALL])dnl
368  AC_REQUIRE([AM_MKINSTALLDIRS])dnl
369  AC_REQUIRE([AC_PROG_CC])dnl
370  AC_REQUIRE([AC_CANONICAL_HOST])dnl
371  AC_REQUIRE([AC_PROG_RANLIB])dnl
372  AC_REQUIRE([AC_ISC_POSIX])dnl
373  AC_REQUIRE([AC_HEADER_STDC])dnl
374  AC_REQUIRE([AC_C_CONST])dnl
375  AC_REQUIRE([AC_C_INLINE])dnl
376  AC_REQUIRE([AC_TYPE_OFF_T])dnl
377  AC_REQUIRE([AC_TYPE_SIZE_T])dnl
378  AC_REQUIRE([AC_FUNC_ALLOCA])dnl
379  AC_REQUIRE([AC_FUNC_MMAP])dnl
380  AC_REQUIRE([jm_GLIBC21])dnl
381  AC_REQUIRE([gt_INTDIV0])dnl
382  AC_REQUIRE([jm_AC_TYPE_UINTMAX_T])dnl
383  AC_REQUIRE([gt_HEADER_INTTYPES_H])dnl
384  AC_REQUIRE([gt_INTTYPES_PRI])dnl
385
386  AC_CHECK_HEADERS([argz.h limits.h locale.h nl_types.h malloc.h stddef.h \
387stdlib.h string.h unistd.h sys/param.h])
388  AC_CHECK_FUNCS([feof_unlocked fgets_unlocked getc_unlocked getcwd getegid \
389geteuid getgid getuid mempcpy munmap putenv setenv setlocale stpcpy \
390strcasecmp strdup strtoul tsearch __argz_count __argz_stringify __argz_next \
391__fsetlocking])
392
393  AM_ICONV
394  AM_LANGINFO_CODESET
395  if test $ac_cv_header_locale_h = yes; then
396    AM_LC_MESSAGES
397  fi
398
399  dnl intl/plural.c is generated from intl/plural.y. It requires bison,
400  dnl because plural.y uses bison specific features. It requires at least
401  dnl bison-1.26 because earlier versions generate a plural.c that doesn't
402  dnl compile.
403  dnl bison is only needed for the maintainer (who touches plural.y). But in
404  dnl order to avoid separate Makefiles or --enable-maintainer-mode, we put
405  dnl the rule in general Makefile. Now, some people carelessly touch the
406  dnl files or have a broken "make" program, hence the plural.c rule will
407  dnl sometimes fire. To avoid an error, defines BISON to ":" if it is not
408  dnl present or too old.
409  AC_CHECK_PROGS([INTLBISON], [bison])
410  if test -z "$INTLBISON"; then
411    ac_verc_fail=yes
412  else
413    dnl Found it, now check the version.
414    AC_MSG_CHECKING([version of bison])
415changequote(<<,>>)dnl
416    ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
417    case $ac_prog_version in
418      '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
419      1.2[6-9]* | 1.[3-9][0-9]* | [2-9].*)
420changequote([,])dnl
421         ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
422      *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
423    esac
424    AC_MSG_RESULT([$ac_prog_version])
425  fi
426  if test $ac_verc_fail = yes; then
427    INTLBISON=:
428  fi
429])
430
431
432dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
433AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])
434