1 # gettext.m4 serial 78 (gettext-0.22.4)
2 dnl Copyright (C) 1995-2014, 2016, 2018-2023 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl This file can be used in projects which are not available under
8 dnl the GNU General Public License or the GNU Lesser General Public
9 dnl License but which still want to provide support for the GNU gettext
11 dnl Please note that the actual code of the GNU gettext library is covered
12 dnl by the GNU Lesser General Public License, and the rest of the GNU
13 dnl gettext package is covered by the GNU General Public License.
14 dnl They are *not* in the public domain.
17 dnl Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
18 dnl Bruno Haible <haible@clisp.cons.org>, 2000-2006, 2008-2010.
20 dnl Macro to add for using GNU gettext.
22 dnl Usage: AM_GNU_GETTEXT([INTLSYMBOL], [NEEDSYMBOL], [INTLDIR]).
23 dnl INTLSYMBOL must be one of 'external', 'use-libtool', 'here'.
24 dnl INTLSYMBOL should be 'external' for packages other than GNU gettext.
25 dnl It should be 'use-libtool' for the packages 'gettext-runtime' and
27 dnl It should be 'here' for the package 'gettext-runtime/intl'.
28 dnl If INTLSYMBOL is 'here', then a libtool library
29 dnl $(top_builddir)/libintl.la will be created (shared and/or static,
30 dnl depending on --{enable,disable}-{shared,static} and on the presence of
31 dnl AM-DISABLE-SHARED).
32 dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
33 dnl implementations (in libc or libintl) without the ngettext() function
34 dnl will be ignored. If NEEDSYMBOL is specified and is
35 dnl 'need-formatstring-macros', then GNU gettext implementations that don't
36 dnl support the ISO C 99 <inttypes.h> formatstring macros will be ignored.
37 dnl INTLDIR is used to find the intl libraries. If empty,
38 dnl the value '$(top_builddir)/intl/' is used.
40 dnl The result of the configuration is one of three cases:
41 dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled
43 dnl Catalog format: GNU --> install in $(datadir)
44 dnl Catalog extension: .mo after installation, .gmo in source tree
45 dnl 2) GNU gettext has been found in the system's C library.
46 dnl Catalog format: GNU --> install in $(datadir)
47 dnl Catalog extension: .mo after installation, .gmo in source tree
48 dnl 3) No internationalization, always use English msgid.
49 dnl Catalog format: none
50 dnl Catalog extension: none
51 dnl If INTLSYMBOL is 'external', only cases 2 and 3 can occur.
52 dnl The use of .gmo is historical (it was needed to avoid overwriting the
53 dnl GNU format catalogs when building on a platform with an X/Open gettext),
54 dnl but we keep it in order not to force irrelevant filename changes on the
57 AC_DEFUN([AM_GNU_GETTEXT],
59 dnl Argument checking.
60 m4_if([$1], [], , [m4_if([$1], [external], , [m4_if([$1], [use-libtool], , [m4_if([$1], [here], ,
61 [errprint([ERROR: invalid first argument to AM_GNU_GETTEXT
63 m4_if(m4_if([$1], [], [old])[]m4_if([$1], [no-libtool], [old]), [old],
64 [errprint([ERROR: Use of AM_GNU_GETTEXT without [external] argument is no longer supported.
66 m4_if([$2], [], , [m4_if([$2], [need-ngettext], , [m4_if([$2], [need-formatstring-macros], ,
67 [errprint([ERROR: invalid second argument to AM_GNU_GETTEXT
69 define([gt_building_libintl_in_same_build_tree],
70 m4_if([$1], [use-libtool], [yes], [m4_if([$1], [here], [yes], [no])]))
72 AM_GNU_GETTEXT_NEED([$2])
74 AC_REQUIRE([AM_PO_SUBDIRS])dnl
76 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
77 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
78 AC_REQUIRE([AC_LIB_RPATH])
80 dnl Sometimes libintl requires libiconv, so first search for libiconv.
81 dnl Ideally we would do this search only after the
82 dnl if test "$USE_NLS" = "yes"; then
83 dnl if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "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 not documented, we avoid it.
90 m4_if(gt_building_libintl_in_same_build_tree, yes, , [
91 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
94 dnl Sometimes, on Mac OS X, libintl requires linking with CoreFoundation.
100 m4_if(gt_building_libintl_in_same_build_tree, yes, [
101 USE_INCLUDED_LIBINTL=no
107 dnl Add a version number to the cache macros.
108 case " $gt_needs " in
109 *" need-formatstring-macros "*) gt_api_version=3 ;;
110 *" need-ngettext "*) gt_api_version=2 ;;
111 *) gt_api_version=1 ;;
113 gt_func_gnugettext_libc="gt_cv_func_gnugettext${gt_api_version}_libc"
114 gt_func_gnugettext_libintl="gt_cv_func_gnugettext${gt_api_version}_libintl"
116 dnl If we use NLS figure out what method
117 if test "$USE_NLS" = "yes"; then
118 gt_use_preinstalled_gnugettext=no
119 m4_if(gt_building_libintl_in_same_build_tree, yes, [
120 AC_MSG_CHECKING([whether included gettext is requested])
121 AC_ARG_WITH([included-gettext],
122 [ --with-included-gettext use the GNU gettext library included here],
123 nls_cv_force_use_gnu_gettext=$withval,
124 nls_cv_force_use_gnu_gettext=no)
125 AC_MSG_RESULT([$nls_cv_force_use_gnu_gettext])
127 nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
128 if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
130 dnl User does not insist on using GNU NLS library. Figure out what
131 dnl to use. If GNU gettext is available we use this. Else we have
132 dnl to fall back to GNU NLS library.
134 if test $gt_api_version -ge 3; then
135 gt_revision_test_code='
136 #ifndef __GNU_GETTEXT_SUPPORTED_REVISION
137 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
140 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
144 gt_revision_test_code=
146 if test $gt_api_version -ge 2; then
147 gt_expression_test_code=' + * ngettext ("", "", 0)'
149 gt_expression_test_code=
152 AC_CACHE_CHECK([for GNU gettext in libc], [$gt_func_gnugettext_libc],
157 #ifndef __GNU_GETTEXT_SUPPORTED_REVISION
158 extern int _nl_msg_cat_cntr;
159 extern int *_nl_domain_bindings;
160 #define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_domain_bindings)
162 #define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
164 $gt_revision_test_code
167 bindtextdomain ("", "");
168 return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION
170 [eval "$gt_func_gnugettext_libc=yes"],
171 [eval "$gt_func_gnugettext_libc=no"])])
173 if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
174 dnl Sometimes libintl requires libiconv, so first search for libiconv.
175 m4_if(gt_building_libintl_in_same_build_tree, yes, , [
178 dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
179 dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
180 dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
181 dnl even if libiconv doesn't exist.
182 AC_LIB_LINKFLAGS_BODY([intl])
183 AC_CACHE_CHECK([for GNU gettext in libintl],
184 [$gt_func_gnugettext_libintl],
185 [gt_save_CPPFLAGS="$CPPFLAGS"
186 CPPFLAGS="$CPPFLAGS $INCINTL"
188 LIBS="$LIBS $LIBINTL"
189 dnl Now see whether libintl exists and does not depend on libiconv.
194 #ifndef __GNU_GETTEXT_SUPPORTED_REVISION
195 extern int _nl_msg_cat_cntr;
200 const char *_nl_expand_alias (const char *);
201 #define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (""))
203 #define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
205 $gt_revision_test_code
208 bindtextdomain ("", "");
209 return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION
211 [eval "$gt_func_gnugettext_libintl=yes"],
212 [eval "$gt_func_gnugettext_libintl=no"])
213 dnl Now see whether libintl exists and depends on libiconv or other
214 dnl OS dependent libraries, specifically on macOS and AIX.
215 gt_LIBINTL_EXTRA="$INTL_MACOSX_LIBS"
216 AC_REQUIRE([AC_CANONICAL_HOST])
218 aix*) gt_LIBINTL_EXTRA="-lpthread" ;;
220 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } \
221 && { test -n "$LIBICONV" || test -n "$gt_LIBINTL_EXTRA"; }; then
222 LIBS="$LIBS $LIBICONV $gt_LIBINTL_EXTRA"
227 #ifndef __GNU_GETTEXT_SUPPORTED_REVISION
228 extern int _nl_msg_cat_cntr;
233 const char *_nl_expand_alias (const char *);
234 #define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (""))
236 #define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
238 $gt_revision_test_code
241 bindtextdomain ("", "");
242 return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION
244 [LIBINTL="$LIBINTL $LIBICONV $gt_LIBINTL_EXTRA"
245 LTLIBINTL="$LTLIBINTL $LTLIBICONV $gt_LIBINTL_EXTRA"
246 eval "$gt_func_gnugettext_libintl=yes"
249 CPPFLAGS="$gt_save_CPPFLAGS"
250 LIBS="$gt_save_LIBS"])
253 dnl If an already present or preinstalled GNU gettext() is found,
254 dnl use it. But if this macro is used in GNU gettext, and GNU
255 dnl gettext is already preinstalled in libintl, we update this
256 dnl libintl. (Cf. the install rule in intl/Makefile.in.)
257 if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \
258 || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \
259 && test "$PACKAGE" != gettext-runtime \
260 && test "$PACKAGE" != gettext-tools \
261 && test "$PACKAGE" != libintl; }; then
262 gt_use_preinstalled_gnugettext=yes
264 dnl Reset the values set by searching for libintl.
270 m4_if(gt_building_libintl_in_same_build_tree, yes, [
271 if test "$gt_use_preinstalled_gnugettext" != "yes"; then
272 dnl GNU gettext is not found in the C library.
273 dnl Fall back on included GNU gettext library.
274 nls_cv_use_gnu_gettext=yes
278 if test "$nls_cv_use_gnu_gettext" = "yes"; then
279 dnl Mark actions used to generate GNU NLS library.
280 USE_INCLUDED_LIBINTL=yes
281 LIBINTL="m4_if([$3],[],\${top_builddir}/intl,[$3])/libintl.la $LIBICONV $LIBTHREAD"
282 LTLIBINTL="m4_if([$3],[],\${top_builddir}/intl,[$3])/libintl.la $LTLIBICONV $LTLIBTHREAD"
283 LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
287 if test "$gt_use_preinstalled_gnugettext" = "yes" \
288 || test "$nls_cv_use_gnu_gettext" = "yes"; then
289 dnl Mark actions to use GNU gettext tools.
294 if test -n "$INTL_MACOSX_LIBS"; then
295 if test "$gt_use_preinstalled_gnugettext" = "yes" \
296 || test "$nls_cv_use_gnu_gettext" = "yes"; then
297 dnl Some extra flags are needed during linking.
298 LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
299 LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
303 if test "$gt_use_preinstalled_gnugettext" = "yes" \
304 || test "$nls_cv_use_gnu_gettext" = "yes"; then
305 AC_DEFINE([ENABLE_NLS], [1],
306 [Define to 1 if translation of program messages to the user's native language
313 AC_MSG_CHECKING([whether to use NLS])
314 AC_MSG_RESULT([$USE_NLS])
315 if test "$USE_NLS" = "yes"; then
316 AC_MSG_CHECKING([where the gettext function comes from])
317 if test "$gt_use_preinstalled_gnugettext" = "yes"; then
318 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
319 gt_source="external libintl"
324 gt_source="included intl directory"
326 AC_MSG_RESULT([$gt_source])
329 if test "$USE_NLS" = "yes"; then
331 if test "$gt_use_preinstalled_gnugettext" = "yes"; then
332 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
333 AC_MSG_CHECKING([how to link with libintl])
334 AC_MSG_RESULT([$LIBINTL])
335 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
338 dnl For backward compatibility. Some packages may be using this.
339 AC_DEFINE([HAVE_GETTEXT], [1],
340 [Define if the GNU gettext() function is already present or preinstalled.])
341 AC_DEFINE([HAVE_DCGETTEXT], [1],
342 [Define if the GNU dcgettext() function is already present or preinstalled.])
345 dnl We need to process the po/ directory.
349 m4_if(gt_building_libintl_in_same_build_tree, yes, [
350 dnl Make all variables we use known to autoconf.
351 AC_SUBST([USE_INCLUDED_LIBINTL])
352 AC_SUBST([CATOBJEXT])
355 m4_if(gt_building_libintl_in_same_build_tree, yes, [], [
356 dnl For backward compatibility. Some Makefiles may be using this.
361 dnl Make all documented variables known to autoconf.
363 AC_SUBST([LTLIBINTL])
366 dnl Define localedir_c and localedir_c_make.
367 dnl Find the final value of localedir.
368 gt_save_prefix="${prefix}"
369 gt_save_datarootdir="${datarootdir}"
370 gt_save_localedir="${localedir}"
371 dnl Unfortunately, prefix gets only finally determined at the end of
373 if test "X$prefix" = "XNONE"; then
374 prefix="$ac_default_prefix"
376 eval datarootdir="$datarootdir"
377 eval localedir="$localedir"
378 gl_BUILD_TO_HOST([localedir])
379 localedir="${gt_save_localedir}"
380 datarootdir="${gt_save_datarootdir}"
381 prefix="${gt_save_prefix}"
385 dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.
386 m4_define([gt_NEEDS_INIT],
388 m4_divert_text([DEFAULTS], [gt_needs=])
389 m4_define([gt_NEEDS_INIT], [])
393 dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
394 AC_DEFUN([AM_GNU_GETTEXT_NEED],
396 m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])
400 dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
401 AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])
404 dnl Usage: AM_GNU_GETTEXT_REQUIRE_VERSION([gettext-version])
405 AC_DEFUN([AM_GNU_GETTEXT_REQUIRE_VERSION], [])