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[awesomized/libmemcached] / m4 / gettext.m4
1 # gettext.m4 serial 60 (gettext-0.17)
2 dnl Copyright (C) 1995-2007 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.
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([$2], [], , [ifelse([$2], [need-ngettext], , [ifelse([$2], [need-formatstring-macros], ,
64 [errprint([ERROR: invalid second argument to AM_GNU_GETTEXT
65 ])])])])
66 dnl Hardcode this, because the previous ifdef just wasn't working
67 define([gt_included_intl],[no])
68 define([gt_libtool_suffix_prefix], ifelse([$1], [use-libtool], [l], []))
69 gt_NEEDS_INIT
70 AM_GNU_GETTEXT_NEED([$2])
71
72 AC_REQUIRE([AM_PO_SUBDIRS])dnl
73 dnl ifelse(gt_included_intl, yes, [
74 dnl AC_REQUIRE([AM_INTL_SUBDIR])dnl
75 dnl ])
76
77 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
78 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
79 AC_REQUIRE([AC_LIB_RPATH])
80
81 dnl Sometimes libintl requires libiconv, so first search for libiconv.
82 dnl Ideally we would do this search only after the
83 dnl if test "$USE_NLS" = "yes"; then
84 dnl if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
85 dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT
86 dnl the configure script would need to contain the same shell code
87 dnl again, outside any 'if'. There are two solutions:
88 dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
89 dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.
90 dnl Since AC_PROVIDE_IFELSE is only in autoconf >= 2.52 and not
91 dnl documented, we avoid it.
92 ifelse(gt_included_intl, yes, , [
93 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
94 ])
95
96 dnl Sometimes, on MacOS X, libintl requires linking with CoreFoundation.
97 gt_INTL_MACOSX
98
99 dnl Set USE_NLS.
100 AC_REQUIRE([AM_NLS])
101
102 ifelse(gt_included_intl, yes, [
103 BUILD_INCLUDED_LIBINTL=no
104 USE_INCLUDED_LIBINTL=no
105 ])
106 LIBINTL=
107 LTLIBINTL=
108 POSUB=
109
110 dnl Add a version number to the cache macros.
111 case " $gt_needs " in
112 *" need-formatstring-macros "*) gt_api_version=3 ;;
113 *" need-ngettext "*) gt_api_version=2 ;;
114 *) gt_api_version=1 ;;
115 esac
116 gt_func_gnugettext_libc="gt_cv_func_gnugettext${gt_api_version}_libc"
117 gt_func_gnugettext_libintl="gt_cv_func_gnugettext${gt_api_version}_libintl"
118
119 dnl If we use NLS figure out what method
120 if test "$USE_NLS" = "yes"; then
121 gt_use_preinstalled_gnugettext=no
122 ifelse(gt_included_intl, yes, [
123 AC_MSG_CHECKING([whether included gettext is requested])
124 AC_ARG_WITH(included-gettext,
125 [ --with-included-gettext use the GNU gettext library included here],
126 nls_cv_force_use_gnu_gettext=$withval,
127 nls_cv_force_use_gnu_gettext=no)
128 AC_MSG_RESULT($nls_cv_force_use_gnu_gettext)
129
130 nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
131 if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
132 ])
133 dnl User does not insist on using GNU NLS library. Figure out what
134 dnl to use. If GNU gettext is available we use this. Else we have
135 dnl to fall back to GNU NLS library.
136
137 if test $gt_api_version -ge 3; then
138 gt_revision_test_code='
139 #ifndef __GNU_GETTEXT_SUPPORTED_REVISION
140 #define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
141 #endif
142 changequote(,)dnl
143 typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
144 changequote([,])dnl
145 '
146 else
147 gt_revision_test_code=
148 fi
149 if test $gt_api_version -ge 2; then
150 gt_expression_test_code=' + * ngettext ("", "", 0)'
151 else
152 gt_expression_test_code=
153 fi
154
155 AC_CACHE_CHECK([for GNU gettext in libc], [$gt_func_gnugettext_libc],
156 [AC_TRY_LINK([#include <libintl.h>
157 $gt_revision_test_code
158 extern int _nl_msg_cat_cntr;
159 extern int *_nl_domain_bindings;],
160 [bindtextdomain ("", "");
161 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_domain_bindings],
162 [eval "$gt_func_gnugettext_libc=yes"],
163 [eval "$gt_func_gnugettext_libc=no"])])
164
165 if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
166 dnl Sometimes libintl requires libiconv, so first search for libiconv.
167 ifelse(gt_included_intl, yes, , [
168 AM_ICONV_LINK
169 ])
170 dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
171 dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
172 dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
173 dnl even if libiconv doesn't exist.
174 AC_LIB_LINKFLAGS_BODY([intl])
175 AC_CACHE_CHECK([for GNU gettext in libintl],
176 [$gt_func_gnugettext_libintl],
177 [gt_save_CPPFLAGS="$CPPFLAGS"
178 CPPFLAGS="$CPPFLAGS $INCINTL"
179 gt_save_LIBS="$LIBS"
180 LIBS="$LIBS $LIBINTL"
181 dnl Now see whether libintl exists and does not depend on libiconv.
182 AC_TRY_LINK([#include <libintl.h>
183 $gt_revision_test_code
184 extern int _nl_msg_cat_cntr;
185 extern
186 #ifdef __cplusplus
187 "C"
188 #endif
189 const char *_nl_expand_alias (const char *);],
190 [bindtextdomain ("", "");
191 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
192 [eval "$gt_func_gnugettext_libintl=yes"],
193 [eval "$gt_func_gnugettext_libintl=no"])
194 dnl Now see whether libintl exists and depends on libiconv.
195 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then
196 LIBS="$LIBS $LIBICONV"
197 AC_TRY_LINK([#include <libintl.h>
198 $gt_revision_test_code
199 extern int _nl_msg_cat_cntr;
200 extern
201 #ifdef __cplusplus
202 "C"
203 #endif
204 const char *_nl_expand_alias (const char *);],
205 [bindtextdomain ("", "");
206 return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
207 [LIBINTL="$LIBINTL $LIBICONV"
208 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
209 eval "$gt_func_gnugettext_libintl=yes"
210 ])
211 fi
212 CPPFLAGS="$gt_save_CPPFLAGS"
213 LIBS="$gt_save_LIBS"])
214 fi
215
216 dnl If an already present or preinstalled GNU gettext() is found,
217 dnl use it. But if this macro is used in GNU gettext, and GNU
218 dnl gettext is already preinstalled in libintl, we update this
219 dnl libintl. (Cf. the install rule in intl/Makefile.in.)
220 if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \
221 || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \
222 && test "$PACKAGE" != gettext-runtime \
223 && test "$PACKAGE" != gettext-tools; }; then
224 gt_use_preinstalled_gnugettext=yes
225 else
226 dnl Reset the values set by searching for libintl.
227 LIBINTL=
228 LTLIBINTL=
229 INCINTL=
230 fi
231
232 ifelse(gt_included_intl, yes, [
233 if test "$gt_use_preinstalled_gnugettext" != "yes"; then
234 dnl GNU gettext is not found in the C library.
235 dnl Fall back on included GNU gettext library.
236 nls_cv_use_gnu_gettext=yes
237 fi
238 fi
239
240 if test "$nls_cv_use_gnu_gettext" = "yes"; then
241 dnl Mark actions used to generate GNU NLS library.
242 BUILD_INCLUDED_LIBINTL=yes
243 USE_INCLUDED_LIBINTL=yes
244 LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV $LIBTHREAD"
245 LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV $LTLIBTHREAD"
246 LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
247 fi
248
249 CATOBJEXT=
250 if test "$gt_use_preinstalled_gnugettext" = "yes" \
251 || test "$nls_cv_use_gnu_gettext" = "yes"; then
252 dnl Mark actions to use GNU gettext tools.
253 CATOBJEXT=.gmo
254 fi
255 ])
256
257 if test -n "$INTL_MACOSX_LIBS"; then
258 if test "$gt_use_preinstalled_gnugettext" = "yes" \
259 || test "$nls_cv_use_gnu_gettext" = "yes"; then
260 dnl Some extra flags are needed during linking.
261 LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
262 LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
263 fi
264 fi
265
266 if test "$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 { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
282 gt_source="external libintl"
283 else
284 gt_source="libc"
285 fi
286 else
287 gt_source="included intl directory"
288 fi
289 AC_MSG_RESULT([$gt_source])
290 fi
291
292 if test "$USE_NLS" = "yes"; then
293
294 if test "$gt_use_preinstalled_gnugettext" = "yes"; then
295 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
296 AC_MSG_CHECKING([how to link with libintl])
297 AC_MSG_RESULT([$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 "$PACKAGE" = gettext-tools; then
316 BUILD_INCLUDED_LIBINTL=yes
317 fi
318
319 dnl Make all variables we use known to autoconf.
320 AC_SUBST(BUILD_INCLUDED_LIBINTL)
321 AC_SUBST(USE_INCLUDED_LIBINTL)
322 AC_SUBST(CATOBJEXT)
323
324 dnl For backward compatibility. Some configure.ins may be using this.
325 nls_cv_header_intl=
326 nls_cv_header_libgt=
327
328 dnl For backward compatibility. Some Makefiles may be using this.
329 DATADIRNAME=share
330 AC_SUBST(DATADIRNAME)
331
332 dnl For backward compatibility. Some Makefiles may be using this.
333 INSTOBJEXT=.mo
334 AC_SUBST(INSTOBJEXT)
335
336 dnl For backward compatibility. Some Makefiles may be using this.
337 GENCAT=gencat
338 AC_SUBST(GENCAT)
339
340 dnl For backward compatibility. Some Makefiles may be using this.
341 INTLOBJS=
342 if test "$USE_INCLUDED_LIBINTL" = yes; then
343 INTLOBJS="\$(GETTOBJS)"
344 fi
345 AC_SUBST(INTLOBJS)
346
347 dnl Enable libtool support if the surrounding package wishes it.
348 INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
349 AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
350 ])
351
352 dnl For backward compatibility. Some Makefiles may be using this.
353 INTLLIBS="$LIBINTL"
354 AC_SUBST(INTLLIBS)
355
356 dnl Make all documented variables known to autoconf.
357 AC_SUBST(LIBINTL)
358 AC_SUBST(LTLIBINTL)
359 AC_SUBST(POSUB)
360 ])
361
362
363 dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.
364 m4_define([gt_NEEDS_INIT],
365 [
366 m4_divert_text([DEFAULTS], [gt_needs=])
367 m4_define([gt_NEEDS_INIT], [])
368 ])
369
370
371 dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
372 AC_DEFUN([AM_GNU_GETTEXT_NEED],
373 [
374 m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])
375 ])
376
377
378 dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
379 AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])