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[dpkg] / m4 / gettext.m4
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1# gettext.m4 serial 68 (gettext-0.19.8)
2dnl Copyright (C) 1995-2014, 2016 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6dnl
7dnl This file can be used in projects which are not available under
8dnl the GNU General Public License or the GNU Library General Public
9dnl License but which still want to provide support for the GNU gettext
10dnl functionality.
11dnl Please note that the actual code of the GNU gettext library is covered
12dnl by the GNU Library General Public License, and the rest of the GNU
13dnl gettext package is covered by the GNU General Public License.
14dnl They are *not* in the public domain.
15
16dnl Authors:
17dnl Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
18dnl Bruno Haible <haible@clisp.cons.org>, 2000-2006, 2008-2010.
19
20dnl Macro to add for using GNU gettext.
21
22dnl Usage: AM_GNU_GETTEXT([INTLSYMBOL], [NEEDSYMBOL], [INTLDIR]).
23dnl INTLSYMBOL can be one of 'external', 'no-libtool', 'use-libtool'. The
24dnl default (if it is not specified or empty) is 'no-libtool'.
25dnl INTLSYMBOL should be 'external' for packages with no intl directory,
26dnl and 'no-libtool' or 'use-libtool' for packages with an intl directory.
27dnl If INTLSYMBOL is 'use-libtool', then a libtool library
28dnl $(top_builddir)/intl/libintl.la will be created (shared and/or static,
29dnl depending on --{enable,disable}-{shared,static} and on the presence of
30dnl AM-DISABLE-SHARED). If INTLSYMBOL is 'no-libtool', a static library
31dnl $(top_builddir)/intl/libintl.a will be created.
32dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
33dnl implementations (in libc or libintl) without the ngettext() function
34dnl will be ignored. If NEEDSYMBOL is specified and is
35dnl 'need-formatstring-macros', then GNU gettext implementations that don't
36dnl support the ISO C 99 <inttypes.h> formatstring macros will be ignored.
37dnl INTLDIR is used to find the intl libraries. If empty,
38dnl the value '$(top_builddir)/intl/' is used.
39dnl
40dnl The result of the configuration is one of three cases:
41dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled
42dnl and used.
43dnl Catalog format: GNU --> install in $(datadir)
44dnl Catalog extension: .mo after installation, .gmo in source tree
45dnl 2) GNU gettext has been found in the system's C library.
46dnl Catalog format: GNU --> install in $(datadir)
47dnl Catalog extension: .mo after installation, .gmo in source tree
48dnl 3) No internationalization, always use English msgid.
49dnl Catalog format: none
50dnl Catalog extension: none
51dnl If INTLSYMBOL is 'external', only cases 2 and 3 can occur.
52dnl The use of .gmo is historical (it was needed to avoid overwriting the
53dnl GNU format catalogs when building on a platform with an X/Open gettext),
54dnl but we keep it in order not to force irrelevant filename changes on the
55dnl maintainers.
56dnl
57AC_DEFUN([AM_GNU_GETTEXT],
58[
59 dnl Argument checking.
60 ifelse([$1], [], , [ifelse([$1], [external], , [ifelse([$1], [no-libtool], , [ifelse([$1], [use-libtool], ,
61 [errprint([ERROR: invalid first argument to AM_GNU_GETTEXT
62])])])])])
63 ifelse(ifelse([$1], [], [old])[]ifelse([$1], [no-libtool], [old]), [old],
64 [AC_DIAGNOSE([obsolete], [Use of AM_GNU_GETTEXT without [external] argument is deprecated.])])
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],
69 ifelse([$1], [external],
70 ifdef([AM_GNU_GETTEXT_][INTL_SUBDIR], [yes], [no]),
71 [yes]))
72 define([gt_libtool_suffix_prefix], ifelse([$1], [use-libtool], [l], []))
73 gt_NEEDS_INIT
74 AM_GNU_GETTEXT_NEED([$2])
75
76 AC_REQUIRE([AM_PO_SUBDIRS])dnl
77 ifelse(gt_included_intl, yes, [
78 AC_REQUIRE([AM_INTL_SUBDIR])dnl
79 ])
80
81 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
82 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
83 AC_REQUIRE([AC_LIB_RPATH])
84
85 dnl Sometimes libintl requires libiconv, so first search for libiconv.
86 dnl Ideally we would do this search only after the
87 dnl if test "$USE_NLS" = "yes"; then
88 dnl if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
89 dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT
90 dnl the configure script would need to contain the same shell code
91 dnl again, outside any 'if'. There are two solutions:
92 dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
93 dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.
94 dnl Since AC_PROVIDE_IFELSE is only in autoconf >= 2.52 and not
95 dnl documented, we avoid it.
96 ifelse(gt_included_intl, yes, , [
97 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
98 ])
99
100 dnl Sometimes, on Mac OS X, libintl requires linking with CoreFoundation.
101 gt_INTL_MACOSX
102
103 dnl Set USE_NLS.
104 AC_REQUIRE([AM_NLS])
105
106 ifelse(gt_included_intl, yes, [
107 BUILD_INCLUDED_LIBINTL=no
108 USE_INCLUDED_LIBINTL=no
109 ])
110 LIBINTL=
111 LTLIBINTL=
112 POSUB=
113
114 dnl Add a version number to the cache macros.
115 case " $gt_needs " in
116 *" need-formatstring-macros "*) gt_api_version=3 ;;
117 *" need-ngettext "*) gt_api_version=2 ;;
118 *) gt_api_version=1 ;;
119 esac
120 gt_func_gnugettext_libc="gt_cv_func_gnugettext${gt_api_version}_libc"
121 gt_func_gnugettext_libintl="gt_cv_func_gnugettext${gt_api_version}_libintl"
122
123 dnl If we use NLS figure out what method
124 if test "$USE_NLS" = "yes"; then
125 gt_use_preinstalled_gnugettext=no
126 ifelse(gt_included_intl, yes, [
127 AC_MSG_CHECKING([whether included gettext is requested])
128 AC_ARG_WITH([included-gettext],
129 [ --with-included-gettext use the GNU gettext library included here],
130 nls_cv_force_use_gnu_gettext=$withval,
131 nls_cv_force_use_gnu_gettext=no)
132 AC_MSG_RESULT([$nls_cv_force_use_gnu_gettext])
133
134 nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
135 if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
136 ])
137 dnl User does not insist on using GNU NLS library. Figure out what
138 dnl to use. If GNU gettext is available we use this. Else we have
139 dnl to fall back to GNU NLS library.
140
141 if test $gt_api_version -ge 3; then
142 gt_revision_test_code='
143#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
144#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
145#endif
146changequote(,)dnl
147typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
148changequote([,])dnl
149'
150 else
151 gt_revision_test_code=
152 fi
153 if test $gt_api_version -ge 2; then
154 gt_expression_test_code=' + * ngettext ("", "", 0)'
155 else
156 gt_expression_test_code=
157 fi
158
159 AC_CACHE_CHECK([for GNU gettext in libc], [$gt_func_gnugettext_libc],
160 [AC_LINK_IFELSE(
161 [AC_LANG_PROGRAM(
162 [[
163#include <libintl.h>
164#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
165extern int _nl_msg_cat_cntr;
166extern int *_nl_domain_bindings;
167#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_domain_bindings)
168#else
169#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
170#endif
171$gt_revision_test_code
172 ]],
173 [[
174bindtextdomain ("", "");
175return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION
176 ]])],
177 [eval "$gt_func_gnugettext_libc=yes"],
178 [eval "$gt_func_gnugettext_libc=no"])])
179
180 if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
181 dnl Sometimes libintl requires libiconv, so first search for libiconv.
182 ifelse(gt_included_intl, yes, , [
183 AM_ICONV_LINK
184 ])
185 dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
186 dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
187 dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
188 dnl even if libiconv doesn't exist.
189 AC_LIB_LINKFLAGS_BODY([intl])
190 AC_CACHE_CHECK([for GNU gettext in libintl],
191 [$gt_func_gnugettext_libintl],
192 [gt_save_CPPFLAGS="$CPPFLAGS"
193 CPPFLAGS="$CPPFLAGS $INCINTL"
194 gt_save_LIBS="$LIBS"
195 LIBS="$LIBS $LIBINTL"
196 dnl Now see whether libintl exists and does not depend on libiconv.
197 AC_LINK_IFELSE(
198 [AC_LANG_PROGRAM(
199 [[
200#include <libintl.h>
201#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
202extern int _nl_msg_cat_cntr;
203extern
204#ifdef __cplusplus
205"C"
206#endif
207const char *_nl_expand_alias (const char *);
208#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (""))
209#else
210#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
211#endif
212$gt_revision_test_code
213 ]],
214 [[
215bindtextdomain ("", "");
216return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION
217 ]])],
218 [eval "$gt_func_gnugettext_libintl=yes"],
219 [eval "$gt_func_gnugettext_libintl=no"])
220 dnl Now see whether libintl exists and depends on libiconv.
221 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then
222 LIBS="$LIBS $LIBICONV"
223 AC_LINK_IFELSE(
224 [AC_LANG_PROGRAM(
225 [[
226#include <libintl.h>
227#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
228extern int _nl_msg_cat_cntr;
229extern
230#ifdef __cplusplus
231"C"
232#endif
233const char *_nl_expand_alias (const char *);
234#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias (""))
235#else
236#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0
237#endif
238$gt_revision_test_code
239 ]],
240 [[
241bindtextdomain ("", "");
242return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION
243 ]])],
244 [LIBINTL="$LIBINTL $LIBICONV"
245 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
246 eval "$gt_func_gnugettext_libintl=yes"
247 ])
248 fi
249 CPPFLAGS="$gt_save_CPPFLAGS"
250 LIBS="$gt_save_LIBS"])
251 fi
252
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 "$PACKAGE" != gettext-tools; }; then
261 gt_use_preinstalled_gnugettext=yes
262 else
263 dnl Reset the values set by searching for libintl.
264 LIBINTL=
265 LTLIBINTL=
266 INCINTL=
267 fi
268
269 ifelse(gt_included_intl, yes, [
270 if test "$gt_use_preinstalled_gnugettext" != "yes"; then
271 dnl GNU gettext is not found in the C library.
272 dnl Fall back on included GNU gettext library.
273 nls_cv_use_gnu_gettext=yes
274 fi
275 fi
276
277 if test "$nls_cv_use_gnu_gettext" = "yes"; then
278 dnl Mark actions used to generate GNU NLS library.
279 BUILD_INCLUDED_LIBINTL=yes
280 USE_INCLUDED_LIBINTL=yes
281 LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV $LIBTHREAD"
282 LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV $LTLIBTHREAD"
283 LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
284 fi
285
286 CATOBJEXT=
287 if test "$gt_use_preinstalled_gnugettext" = "yes" \
288 || test "$nls_cv_use_gnu_gettext" = "yes"; then
289 dnl Mark actions to use GNU gettext tools.
290 CATOBJEXT=.gmo
291 fi
292 ])
293
294 if test -n "$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 $INTL_MACOSX_LIBS"
300 fi
301 fi
302
303 if test "$gt_use_preinstalled_gnugettext" = "yes" \
304 || test "$nls_cv_use_gnu_gettext" = "yes"; then
305 AC_DEFINE([ENABLE_NLS], [1],
306 [Define to 1 if translation of program messages to the user's native language
307 is requested.])
308 else
309 USE_NLS=no
310 fi
311 fi
312
313 AC_MSG_CHECKING([whether to use NLS])
314 AC_MSG_RESULT([$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 "$gt_val" = "yes"; }; then
319 gt_source="external libintl"
320 else
321 gt_source="libc"
322 fi
323 else
324 gt_source="included intl directory"
325 fi
326 AC_MSG_RESULT([$gt_source])
327 fi
328
329 if test "$USE_NLS" = "yes"; then
330
331 if test "$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], [$INCINTL])
336 fi
337
338 dnl For backward compatibility. Some packages may be using this.
339 AC_DEFINE([HAVE_GETTEXT], [1],
340 [Define if the GNU gettext() function is already present or preinstalled.])
341 AC_DEFINE([HAVE_DCGETTEXT], [1],
342 [Define if the GNU dcgettext() function is already present or preinstalled.])
343 fi
344
345 dnl We need to process the po/ directory.
346 POSUB=po
347 fi
348
349 ifelse(gt_included_intl, yes, [
350 dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
351 dnl to 'yes' because some of the testsuite requires it.
352 if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
353 BUILD_INCLUDED_LIBINTL=yes
354 fi
355
356 dnl Make all variables we use known to autoconf.
357 AC_SUBST([BUILD_INCLUDED_LIBINTL])
358 AC_SUBST([USE_INCLUDED_LIBINTL])
359 AC_SUBST([CATOBJEXT])
360
361 dnl For backward compatibility. Some configure.ins may be using this.
362 nls_cv_header_intl=
363 nls_cv_header_libgt=
364
365 dnl For backward compatibility. Some Makefiles may be using this.
366 DATADIRNAME=share
367 AC_SUBST([DATADIRNAME])
368
369 dnl For backward compatibility. Some Makefiles may be using this.
370 INSTOBJEXT=.mo
371 AC_SUBST([INSTOBJEXT])
372
373 dnl For backward compatibility. Some Makefiles may be using this.
374 GENCAT=gencat
375 AC_SUBST([GENCAT])
376
377 dnl For backward compatibility. Some Makefiles may be using this.
378 INTLOBJS=
379 if test "$USE_INCLUDED_LIBINTL" = yes; then
380 INTLOBJS="\$(GETTOBJS)"
381 fi
382 AC_SUBST([INTLOBJS])
383
384 dnl Enable libtool support if the surrounding package wishes it.
385 INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
386 AC_SUBST([INTL_LIBTOOL_SUFFIX_PREFIX])
387 ])
388
389 dnl For backward compatibility. Some Makefiles may be using this.
390 INTLLIBS="$LIBINTL"
391 AC_SUBST([INTLLIBS])
392
393 dnl Make all documented variables known to autoconf.
394 AC_SUBST([LIBINTL])
395 AC_SUBST([LTLIBINTL])
396 AC_SUBST([POSUB])
397])
398
399
400dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.
401m4_define([gt_NEEDS_INIT],
402[
403 m4_divert_text([DEFAULTS], [gt_needs=])
404 m4_define([gt_NEEDS_INIT], [])
405])
406
407
408dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
409AC_DEFUN([AM_GNU_GETTEXT_NEED],
410[
411 m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])
412])
413
414
415dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
416AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])
417
418
419dnl Usage: AM_GNU_GETTEXT_REQUIRE_VERSION([gettext-version])
420AC_DEFUN([AM_GNU_GETTEXT_REQUIRE_VERSION], [])