[packages] add gettext dummy library
[openwrt/svn-archive/archive.git] / libs / gettext / src / m4 / gettext.m4
1 # gettext.m4 serial 63 (gettext-0.18)
2 dnl Copyright (C) 1995-2010 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.
6 dnl
7 dnl This file can can be used in projects which are not available under
8 dnl the GNU General Public License or the GNU Library General Public
9 dnl License but which still want to provide support for the GNU gettext
10 dnl functionality.
11 dnl Please note that the actual code of the GNU gettext library is covered
12 dnl by the GNU Library General Public License, and the rest of the GNU
13 dnl gettext package package is covered by the GNU General Public License.
14 dnl They are *not* in the public domain.
15
16 dnl Authors:
17 dnl Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
18 dnl Bruno Haible <haible@clisp.cons.org>, 2000-2006, 2008-2010.
19
20 dnl Macro to add for using GNU gettext.
21
22 dnl Usage: AM_GNU_GETTEXT([INTLSYMBOL], [NEEDSYMBOL], [INTLDIR]).
23 dnl INTLSYMBOL can be one of 'external', 'no-libtool', 'use-libtool'. The
24 dnl default (if it is not specified or empty) is 'no-libtool'.
25 dnl INTLSYMBOL should be 'external' for packages with no intl directory,
26 dnl and 'no-libtool' or 'use-libtool' for packages with an intl directory.
27 dnl If INTLSYMBOL is 'use-libtool', then a libtool library
28 dnl $(top_builddir)/intl/libintl.la will be created (shared and/or static,
29 dnl depending on --{enable,disable}-{shared,static} and on the presence of
30 dnl AM-DISABLE-SHARED). If INTLSYMBOL is 'no-libtool', a static library
31 dnl $(top_builddir)/intl/libintl.a will be created.
32 dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext
33 dnl implementations (in libc or libintl) without the ngettext() function
34 dnl will be ignored. If NEEDSYMBOL is specified and is
35 dnl 'need-formatstring-macros', then GNU gettext implementations that don't
36 dnl support the ISO C 99 <inttypes.h> formatstring macros will be ignored.
37 dnl INTLDIR is used to find the intl libraries. If empty,
38 dnl the value `$(top_builddir)/intl/' is used.
39 dnl
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
42 dnl and used.
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
55 dnl maintainers.
56 dnl
57 AC_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 MacOS 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
146 changequote(,)dnl
147 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
148 changequote([,])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_TRY_LINK([#include <libintl.h>
161 $gt_revision_test_code
162 extern int _nl_msg_cat_cntr;
163 extern int *_nl_domain_bindings;],
164 [bindtextdomain ("", "");
165 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_domain_bindings],
166 [eval "$gt_func_gnugettext_libc=yes"],
167 [eval "$gt_func_gnugettext_libc=no"])])
168
169 if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
170 dnl Sometimes libintl requires libiconv, so first search for libiconv.
171 ifelse(gt_included_intl, yes, , [
172 AM_ICONV_LINK
173 ])
174 dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
175 dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
176 dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
177 dnl even if libiconv doesn't exist.
178 AC_LIB_LINKFLAGS_BODY([intl])
179 AC_CACHE_CHECK([for GNU gettext in libintl],
180 [$gt_func_gnugettext_libintl],
181 [gt_save_CPPFLAGS="$CPPFLAGS"
182 CPPFLAGS="$CPPFLAGS $INCINTL"
183 gt_save_LIBS="$LIBS"
184 LIBS="$LIBS $LIBINTL"
185 dnl Now see whether libintl exists and does not depend on libiconv.
186 AC_TRY_LINK([#include <libintl.h>
187 $gt_revision_test_code
188 extern int _nl_msg_cat_cntr;
189 extern
190 #ifdef __cplusplus
191 "C"
192 #endif
193 const char *_nl_expand_alias (const char *);],
194 [bindtextdomain ("", "");
195 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
196 [eval "$gt_func_gnugettext_libintl=yes"],
197 [eval "$gt_func_gnugettext_libintl=no"])
198 dnl Now see whether libintl exists and depends on libiconv.
199 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then
200 LIBS="$LIBS $LIBICONV"
201 AC_TRY_LINK([#include <libintl.h>
202 $gt_revision_test_code
203 extern int _nl_msg_cat_cntr;
204 extern
205 #ifdef __cplusplus
206 "C"
207 #endif
208 const char *_nl_expand_alias (const char *);],
209 [bindtextdomain ("", "");
210 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
211 [LIBINTL="$LIBINTL $LIBICONV"
212 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
213 eval "$gt_func_gnugettext_libintl=yes"
214 ])
215 fi
216 CPPFLAGS="$gt_save_CPPFLAGS"
217 LIBS="$gt_save_LIBS"])
218 fi
219
220 dnl If an already present or preinstalled GNU gettext() is found,
221 dnl use it. But if this macro is used in GNU gettext, and GNU
222 dnl gettext is already preinstalled in libintl, we update this
223 dnl libintl. (Cf. the install rule in intl/Makefile.in.)
224 if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \
225 || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \
226 && test "$PACKAGE" != gettext-runtime \
227 && test "$PACKAGE" != gettext-tools; }; then
228 gt_use_preinstalled_gnugettext=yes
229 else
230 dnl Reset the values set by searching for libintl.
231 LIBINTL=
232 LTLIBINTL=
233 INCINTL=
234 fi
235
236 ifelse(gt_included_intl, yes, [
237 if test "$gt_use_preinstalled_gnugettext" != "yes"; then
238 dnl GNU gettext is not found in the C library.
239 dnl Fall back on included GNU gettext library.
240 nls_cv_use_gnu_gettext=yes
241 fi
242 fi
243
244 if test "$nls_cv_use_gnu_gettext" = "yes"; then
245 dnl Mark actions used to generate GNU NLS library.
246 BUILD_INCLUDED_LIBINTL=yes
247 USE_INCLUDED_LIBINTL=yes
248 LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV $LIBTHREAD"
249 LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV $LTLIBTHREAD"
250 LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
251 fi
252
253 CATOBJEXT=
254 if test "$gt_use_preinstalled_gnugettext" = "yes" \
255 || test "$nls_cv_use_gnu_gettext" = "yes"; then
256 dnl Mark actions to use GNU gettext tools.
257 CATOBJEXT=.gmo
258 fi
259 ])
260
261 if test -n "$INTL_MACOSX_LIBS"; then
262 if test "$gt_use_preinstalled_gnugettext" = "yes" \
263 || test "$nls_cv_use_gnu_gettext" = "yes"; then
264 dnl Some extra flags are needed during linking.
265 LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
266 LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
267 fi
268 fi
269
270 if test "$gt_use_preinstalled_gnugettext" = "yes" \
271 || test "$nls_cv_use_gnu_gettext" = "yes"; then
272 AC_DEFINE([ENABLE_NLS], [1],
273 [Define to 1 if translation of program messages to the user's native language
274 is requested.])
275 else
276 USE_NLS=no
277 fi
278 fi
279
280 AC_MSG_CHECKING([whether to use NLS])
281 AC_MSG_RESULT([$USE_NLS])
282 if test "$USE_NLS" = "yes"; then
283 AC_MSG_CHECKING([where the gettext function comes from])
284 if test "$gt_use_preinstalled_gnugettext" = "yes"; then
285 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
286 gt_source="external libintl"
287 else
288 gt_source="libc"
289 fi
290 else
291 gt_source="included intl directory"
292 fi
293 AC_MSG_RESULT([$gt_source])
294 fi
295
296 if test "$USE_NLS" = "yes"; then
297
298 if test "$gt_use_preinstalled_gnugettext" = "yes"; then
299 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
300 AC_MSG_CHECKING([how to link with libintl])
301 AC_MSG_RESULT([$LIBINTL])
302 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
303 fi
304
305 dnl For backward compatibility. Some packages may be using this.
306 AC_DEFINE([HAVE_GETTEXT], [1],
307 [Define if the GNU gettext() function is already present or preinstalled.])
308 AC_DEFINE([HAVE_DCGETTEXT], [1],
309 [Define if the GNU dcgettext() function is already present or preinstalled.])
310 fi
311
312 dnl We need to process the po/ directory.
313 POSUB=po
314 fi
315
316 ifelse(gt_included_intl, yes, [
317 dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
318 dnl to 'yes' because some of the testsuite requires it.
319 if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
320 BUILD_INCLUDED_LIBINTL=yes
321 fi
322
323 dnl Make all variables we use known to autoconf.
324 AC_SUBST([BUILD_INCLUDED_LIBINTL])
325 AC_SUBST([USE_INCLUDED_LIBINTL])
326 AC_SUBST([CATOBJEXT])
327
328 dnl For backward compatibility. Some configure.ins may be using this.
329 nls_cv_header_intl=
330 nls_cv_header_libgt=
331
332 dnl For backward compatibility. Some Makefiles may be using this.
333 DATADIRNAME=share
334 AC_SUBST([DATADIRNAME])
335
336 dnl For backward compatibility. Some Makefiles may be using this.
337 INSTOBJEXT=.mo
338 AC_SUBST([INSTOBJEXT])
339
340 dnl For backward compatibility. Some Makefiles may be using this.
341 GENCAT=gencat
342 AC_SUBST([GENCAT])
343
344 dnl For backward compatibility. Some Makefiles may be using this.
345 INTLOBJS=
346 if test "$USE_INCLUDED_LIBINTL" = yes; then
347 INTLOBJS="\$(GETTOBJS)"
348 fi
349 AC_SUBST([INTLOBJS])
350
351 dnl Enable libtool support if the surrounding package wishes it.
352 INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
353 AC_SUBST([INTL_LIBTOOL_SUFFIX_PREFIX])
354 ])
355
356 dnl For backward compatibility. Some Makefiles may be using this.
357 INTLLIBS="$LIBINTL"
358 AC_SUBST([INTLLIBS])
359
360 dnl Make all documented variables known to autoconf.
361 AC_SUBST([LIBINTL])
362 AC_SUBST([LTLIBINTL])
363 AC_SUBST([POSUB])
364 ])
365
366
367 dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.
368 m4_define([gt_NEEDS_INIT],
369 [
370 m4_divert_text([DEFAULTS], [gt_needs=])
371 m4_define([gt_NEEDS_INIT], [])
372 ])
373
374
375 dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
376 AC_DEFUN([AM_GNU_GETTEXT_NEED],
377 [
378 m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])
379 ])
380
381
382 dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
383 AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])