1# gettext.m4 serial 37 (gettext-0.14.4)
2dnl Copyright (C) 1995-2005 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 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 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>, 2000-2003.
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([$2], [], , [ifelse([$2], [need-ngettext], , [ifelse([$2], [need-formatstring-macros], ,
64    [errprint([ERROR: invalid second argument to AM_GNU_GETTEXT
65])])])])
66  define([gt_included_intl], ifelse([$1], [external], [no], [yes]))
67  define([gt_libtool_suffix_prefix], ifelse([$1], [use-libtool], [l], []))
68
69  AC_REQUIRE([AM_PO_SUBDIRS])dnl
70  ifelse(gt_included_intl, yes, [
71    AC_REQUIRE([AM_INTL_SUBDIR])dnl
72  ])
73
74  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
75  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
76  AC_REQUIRE([AC_LIB_RPATH])
77
78  dnl Sometimes libintl requires libiconv, so first search for libiconv.
79  dnl Ideally we would do this search only after the
80  dnl      if test "$USE_NLS" = "yes"; then
81  dnl        if test "$gt_cv_func_gnugettext_libc" != "yes"; then
82  dnl tests. But if configure.in invokes AM_ICONV after AM_GNU_GETTEXT
83  dnl the configure script would need to contain the same shell code
84  dnl again, outside any 'if'. There are two solutions:
85  dnl - Invoke AM_ICONV_LINKFLAGS_BODY here, outside any 'if'.
86  dnl - Control the expansions in more detail using AC_PROVIDE_IFELSE.
87  dnl Since AC_PROVIDE_IFELSE is only in autoconf >= 2.52 and not
88  dnl documented, we avoid it.
89  ifelse(gt_included_intl, yes, , [
90    AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
91  ])
92
93  dnl Sometimes, on MacOS X, libintl requires linking with CoreFoundation.
94  gt_INTL_MACOSX
95
96  dnl Set USE_NLS.
97  AM_NLS
98
99  ifelse(gt_included_intl, yes, [
100    BUILD_INCLUDED_LIBINTL=no
101    USE_INCLUDED_LIBINTL=no
102  ])
103  LIBINTL=
104  LTLIBINTL=
105  POSUB=
106
107  dnl If we use NLS figure out what method
108  if test "$USE_NLS" = "yes"; then
109    gt_use_preinstalled_gnugettext=no
110    ifelse(gt_included_intl, yes, [
111      AC_MSG_CHECKING([whether included gettext is requested])
112      AC_ARG_WITH(included-gettext,
113        [  --with-included-gettext use the GNU gettext library included here],
114        nls_cv_force_use_gnu_gettext=$withval,
115        nls_cv_force_use_gnu_gettext=no)
116      AC_MSG_RESULT($nls_cv_force_use_gnu_gettext)
117
118      nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext"
119      if test "$nls_cv_force_use_gnu_gettext" != "yes"; then
120    ])
121        dnl User does not insist on using GNU NLS library.  Figure out what
122        dnl to use.  If GNU gettext is available we use this.  Else we have
123        dnl to fall back to GNU NLS library.
124
125        dnl Add a version number to the cache macros.
126        define([gt_api_version], ifelse([$2], [need-formatstring-macros], 3, ifelse([$2], [need-ngettext], 2, 1)))
127        define([gt_cv_func_gnugettext_libc], [gt_cv_func_gnugettext]gt_api_version[_libc])
128        define([gt_cv_func_gnugettext_libintl], [gt_cv_func_gnugettext]gt_api_version[_libintl])
129
130        AC_CACHE_CHECK([for GNU gettext in libc], gt_cv_func_gnugettext_libc,
131         [AC_TRY_LINK([#include <libintl.h>
132]ifelse([$2], [need-formatstring-macros],
133[#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
134#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
135#endif
136changequote(,)dnl
137typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
138changequote([,])dnl
139], [])[extern int _nl_msg_cat_cntr;
140extern int *_nl_domain_bindings;],
141            [bindtextdomain ("", "");
142return * gettext ("")]ifelse([$2], [need-ngettext], [ + * ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr + *_nl_domain_bindings],
143            gt_cv_func_gnugettext_libc=yes,
144            gt_cv_func_gnugettext_libc=no)])
145
146        if test "$gt_cv_func_gnugettext_libc" != "yes"; then
147          dnl Sometimes libintl requires libiconv, so first search for libiconv.
148          ifelse(gt_included_intl, yes, , [
149            AM_ICONV_LINK
150          ])
151          dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
152          dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
153          dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
154          dnl even if libiconv doesn't exist.
155          AC_LIB_LINKFLAGS_BODY([intl])
156          AC_CACHE_CHECK([for GNU gettext in libintl],
157            gt_cv_func_gnugettext_libintl,
158           [gt_save_CPPFLAGS="$CPPFLAGS"
159            CPPFLAGS="$CPPFLAGS $INCINTL"
160            gt_save_LIBS="$LIBS"
161            LIBS="$LIBS $LIBINTL"
162            dnl Now see whether libintl exists and does not depend on libiconv.
163            AC_TRY_LINK([#include <libintl.h>
164]ifelse([$2], [need-formatstring-macros],
165[#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
166#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
167#endif
168changequote(,)dnl
169typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
170changequote([,])dnl
171], [])[extern int _nl_msg_cat_cntr;
172extern
173#ifdef __cplusplus
174"C"
175#endif
176const char *_nl_expand_alias (const char *);],
177              [bindtextdomain ("", "");
178return * gettext ("")]ifelse([$2], [need-ngettext], [ + * ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
179              gt_cv_func_gnugettext_libintl=yes,
180              gt_cv_func_gnugettext_libintl=no)
181            dnl Now see whether libintl exists and depends on libiconv.
182            if test "$gt_cv_func_gnugettext_libintl" != yes && test -n "$LIBICONV"; then
183              LIBS="$LIBS $LIBICONV"
184              AC_TRY_LINK([#include <libintl.h>
185]ifelse([$2], [need-formatstring-macros],
186[#ifndef __GNU_GETTEXT_SUPPORTED_REVISION
187#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1)
188#endif
189changequote(,)dnl
190typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1];
191changequote([,])dnl
192], [])[extern int _nl_msg_cat_cntr;
193extern
194#ifdef __cplusplus
195"C"
196#endif
197const char *_nl_expand_alias (const char *);],
198                [bindtextdomain ("", "");
199return * gettext ("")]ifelse([$2], [need-ngettext], [ + * ngettext ("", "", 0)], [])[ + _nl_msg_cat_cntr + *_nl_expand_alias ("")],
200               [LIBINTL="$LIBINTL $LIBICONV"
201                LTLIBINTL="$LTLIBINTL $LTLIBICONV"
202                gt_cv_func_gnugettext_libintl=yes
203               ])
204            fi
205            CPPFLAGS="$gt_save_CPPFLAGS"
206            LIBS="$gt_save_LIBS"])
207        fi
208
209        dnl If an already present or preinstalled GNU gettext() is found,
210        dnl use it.  But if this macro is used in GNU gettext, and GNU
211        dnl gettext is already preinstalled in libintl, we update this
212        dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
213        if test "$gt_cv_func_gnugettext_libc" = "yes" \
214           || { test "$gt_cv_func_gnugettext_libintl" = "yes" \
215                && test "$PACKAGE" != gettext-runtime \
216                && test "$PACKAGE" != gettext-tools; }; then
217          gt_use_preinstalled_gnugettext=yes
218        else
219          dnl Reset the values set by searching for libintl.
220          LIBINTL=
221          LTLIBINTL=
222          INCINTL=
223        fi
224
225    ifelse(gt_included_intl, yes, [
226        if test "$gt_use_preinstalled_gnugettext" != "yes"; then
227          dnl GNU gettext is not found in the C library.
228          dnl Fall back on included GNU gettext library.
229          nls_cv_use_gnu_gettext=yes
230        fi
231      fi
232
233      if test "$nls_cv_use_gnu_gettext" = "yes"; then
234        dnl Mark actions used to generate GNU NLS library.
235        BUILD_INCLUDED_LIBINTL=yes
236        USE_INCLUDED_LIBINTL=yes
237        LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV"
238        LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV"
239        LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
240      fi
241
242      CATOBJEXT=
243      if test "$gt_use_preinstalled_gnugettext" = "yes" \
244         || test "$nls_cv_use_gnu_gettext" = "yes"; then
245        dnl Mark actions to use GNU gettext tools.
246        CATOBJEXT=.gmo
247      fi
248    ])
249
250    if test -n "$INTL_MACOSX_LIBS"; then
251      if test "$gt_use_preinstalled_gnugettext" = "yes" \
252         || test "$nls_cv_use_gnu_gettext" = "yes"; then
253        dnl Some extra flags are needed during linking.
254        LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
255        LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
256      fi
257    fi
258
259    if test "$gt_use_preinstalled_gnugettext" = "yes" \
260       || test "$nls_cv_use_gnu_gettext" = "yes"; then
261      AC_DEFINE(ENABLE_NLS, 1,
262        [Define to 1 if translation of program messages to the user's native language
263   is requested.])
264    else
265      USE_NLS=no
266    fi
267  fi
268
269  AC_MSG_CHECKING([whether to use NLS])
270  AC_MSG_RESULT([$USE_NLS])
271  if test "$USE_NLS" = "yes"; then
272    AC_MSG_CHECKING([where the gettext function comes from])
273    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
274      if test "$gt_cv_func_gnugettext_libintl" = "yes"; then
275        gt_source="external libintl"
276      else
277        gt_source="libc"
278      fi
279    else
280      gt_source="included intl directory"
281    fi
282    AC_MSG_RESULT([$gt_source])
283  fi
284
285  if test "$USE_NLS" = "yes"; then
286
287    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
288      if test "$gt_cv_func_gnugettext_libintl" = "yes"; then
289        AC_MSG_CHECKING([how to link with libintl])
290        AC_MSG_RESULT([$LIBINTL])
291        AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
292      fi
293
294      dnl For backward compatibility. Some packages may be using this.
295      AC_DEFINE(HAVE_GETTEXT, 1,
296       [Define if the GNU gettext() function is already present or preinstalled.])
297      AC_DEFINE(HAVE_DCGETTEXT, 1,
298       [Define if the GNU dcgettext() function is already present or preinstalled.])
299    fi
300
301    dnl We need to process the po/ directory.
302    POSUB=po
303  fi
304
305  ifelse(gt_included_intl, yes, [
306    dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
307    dnl to 'yes' because some of the testsuite requires it.
308    if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
309      BUILD_INCLUDED_LIBINTL=yes
310    fi
311
312    dnl Make all variables we use known to autoconf.
313    AC_SUBST(BUILD_INCLUDED_LIBINTL)
314    AC_SUBST(USE_INCLUDED_LIBINTL)
315    AC_SUBST(CATOBJEXT)
316
317    dnl For backward compatibility. Some configure.ins may be using this.
318    nls_cv_header_intl=
319    nls_cv_header_libgt=
320
321    dnl For backward compatibility. Some Makefiles may be using this.
322    DATADIRNAME=share
323    AC_SUBST(DATADIRNAME)
324
325    dnl For backward compatibility. Some Makefiles may be using this.
326    INSTOBJEXT=.mo
327    AC_SUBST(INSTOBJEXT)
328
329    dnl For backward compatibility. Some Makefiles may be using this.
330    GENCAT=gencat
331    AC_SUBST(GENCAT)
332
333    dnl For backward compatibility. Some Makefiles may be using this.
334    INTLOBJS=
335    if test "$USE_INCLUDED_LIBINTL" = yes; then
336      INTLOBJS="\$(GETTOBJS)"
337    fi
338    AC_SUBST(INTLOBJS)
339
340    dnl Enable libtool support if the surrounding package wishes it.
341    INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
342    AC_SUBST(INTL_LIBTOOL_SUFFIX_PREFIX)
343  ])
344
345  dnl For backward compatibility. Some Makefiles may be using this.
346  INTLLIBS="$LIBINTL"
347  AC_SUBST(INTLLIBS)
348
349  dnl Make all documented variables known to autoconf.
350  AC_SUBST(LIBINTL)
351  AC_SUBST(LTLIBINTL)
352  AC_SUBST(POSUB)
353])
354
355
356dnl Checks for all prerequisites of the intl subdirectory,
357dnl except for INTL_LIBTOOL_SUFFIX_PREFIX (and possibly LIBTOOL), INTLOBJS,
358dnl            USE_INCLUDED_LIBINTL, BUILD_INCLUDED_LIBINTL.
359    AC_DEFUN([AM_INTL_SUBDIR], [])
360
361
362dnl Checks for special options needed on MacOS X.
363dnl Defines INTL_MACOSX_LIBS.
364AC_DEFUN([gt_INTL_MACOSX],
365[
366  dnl Check for API introduced in MacOS X 10.2.
367  AC_CACHE_CHECK([for CFPreferencesCopyAppValue],
368    gt_cv_func_CFPreferencesCopyAppValue,
369    [gt_save_CPPFLAGS="$CPPFLAGS"
370     CPPFLAGS="$CPPFLAGS -I/System/Library/Frameworks/CoreFoundation.framework/Headers"
371     gt_save_LIBS="$LIBS"
372     LIBS="$LIBS -framework CoreFoundation"
373     AC_TRY_LINK([#include <CFPreferences.h>],
374       [CFPreferencesCopyAppValue(NULL, NULL)],
375       [gt_cv_func_CFPreferencesCopyAppValue=yes],
376       [gt_cv_func_CFPreferencesCopyAppValue=no])
377     CPPFLAGS="$gt_save_CPPFLAGS"
378     LIBS="$gt_save_LIBS"])
379  if test $gt_cv_func_CFPreferencesCopyAppValue = yes; then
380    AC_DEFINE([HAVE_CFPREFERENCESCOPYAPPVALUE], 1,
381      [Define to 1 if you have the MacOS X function CFPreferencesCopyAppValue in the CoreFoundation framework.])
382  fi
383  dnl Check for API introduced in MacOS X 10.3.
384  AC_CACHE_CHECK([for CFLocaleCopyCurrent], gt_cv_func_CFLocaleCopyCurrent,
385    [gt_save_CPPFLAGS="$CPPFLAGS"
386     CPPFLAGS="$CPPFLAGS -I/System/Library/Frameworks/CoreFoundation.framework/Headers"
387     gt_save_LIBS="$LIBS"
388     LIBS="$LIBS -framework CoreFoundation"
389     AC_TRY_LINK([#include <CFLocale.h>], [CFLocaleCopyCurrent();],
390       [gt_cv_func_CFLocaleCopyCurrent=yes],
391       [gt_cv_func_CFLocaleCopyCurrent=no])
392     CPPFLAGS="$gt_save_CPPFLAGS"
393     LIBS="$gt_save_LIBS"])
394  if test $gt_cv_func_CFLocaleCopyCurrent = yes; then
395    AC_DEFINE([HAVE_CFLOCALECOPYCURRENT], 1,
396      [Define to 1 if you have the MacOS X function CFLocaleCopyCurrent in the CoreFoundation framework.])
397  fi
398  INTL_MACOSX_LIBS=
399  if test $gt_cv_func_CFPreferencesCopyAppValue = yes || test $gt_cv_func_CFLocaleCopyCurrent = yes; then
400    INTL_MACOSX_LIBS="-Wl,-framework -Wl,CoreFoundation"
401  fi
402  AC_SUBST([INTL_MACOSX_LIBS])
403])
404
405
406dnl gt_CHECK_DECL(FUNC, INCLUDES)
407dnl Check whether a function is declared.
408AC_DEFUN([gt_CHECK_DECL],
409[
410  AC_CACHE_CHECK([whether $1 is declared], ac_cv_have_decl_$1,
411    [AC_TRY_COMPILE([$2], [
412#ifndef $1
413  char *p = (char *) $1;
414#endif
415], ac_cv_have_decl_$1=yes, ac_cv_have_decl_$1=no)])
416  if test $ac_cv_have_decl_$1 = yes; then
417    gt_value=1
418  else
419    gt_value=0
420  fi
421  AC_DEFINE_UNQUOTED([HAVE_DECL_]translit($1, [a-z], [A-Z]), [$gt_value],
422    [Define to 1 if you have the declaration of `$1', and to 0 if you don't.])
423])
424
425
426dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
427AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])
428