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1# gettext.m4 serial 66 (gettext-0.18.2)
2dnl Copyright (C) 1995-2012 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>, 2000-2006, 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$gt_revision_test_code
165extern int _nl_msg_cat_cntr;
166extern int *_nl_domain_bindings;
167               ]],
168               [[
169bindtextdomain ("", "");
170return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_domain_bindings
171               ]])],
172            [eval "$gt_func_gnugettext_libc=yes"],
173            [eval "$gt_func_gnugettext_libc=no"])])
174
175        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" != "yes"; }; then
176          dnl Sometimes libintl requires libiconv, so first search for libiconv.
177          ifelse(gt_included_intl, yes, , [
178            AM_ICONV_LINK
179          ])
180          dnl Search for libintl and define LIBINTL, LTLIBINTL and INCINTL
181          dnl accordingly. Don't use AC_LIB_LINKFLAGS_BODY([intl],[iconv])
182          dnl because that would add "-liconv" to LIBINTL and LTLIBINTL
183          dnl even if libiconv doesn't exist.
184          AC_LIB_LINKFLAGS_BODY([intl])
185          AC_CACHE_CHECK([for GNU gettext in libintl],
186            [$gt_func_gnugettext_libintl],
187           [gt_save_CPPFLAGS="$CPPFLAGS"
188            CPPFLAGS="$CPPFLAGS $INCINTL"
189            gt_save_LIBS="$LIBS"
190            LIBS="$LIBS $LIBINTL"
191            dnl Now see whether libintl exists and does not depend on libiconv.
192            AC_LINK_IFELSE(
193              [AC_LANG_PROGRAM(
194                 [[
195#include <libintl.h>
196$gt_revision_test_code
197extern int _nl_msg_cat_cntr;
198extern
199#ifdef __cplusplus
200"C"
201#endif
202const char *_nl_expand_alias (const char *);
203                 ]],
204                 [[
205bindtextdomain ("", "");
206return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")
207                 ]])],
208              [eval "$gt_func_gnugettext_libintl=yes"],
209              [eval "$gt_func_gnugettext_libintl=no"])
210            dnl Now see whether libintl exists and depends on libiconv.
211            if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then
212              LIBS="$LIBS $LIBICONV"
213              AC_LINK_IFELSE(
214                [AC_LANG_PROGRAM(
215                   [[
216#include <libintl.h>
217$gt_revision_test_code
218extern int _nl_msg_cat_cntr;
219extern
220#ifdef __cplusplus
221"C"
222#endif
223const char *_nl_expand_alias (const char *);
224                   ]],
225                   [[
226bindtextdomain ("", "");
227return * gettext ("")$gt_expression_test_code + _nl_msg_cat_cntr + *_nl_expand_alias ("")
228                   ]])],
229                [LIBINTL="$LIBINTL $LIBICONV"
230                 LTLIBINTL="$LTLIBINTL $LTLIBICONV"
231                 eval "$gt_func_gnugettext_libintl=yes"
232                ])
233            fi
234            CPPFLAGS="$gt_save_CPPFLAGS"
235            LIBS="$gt_save_LIBS"])
236        fi
237
238        dnl If an already present or preinstalled GNU gettext() is found,
239        dnl use it.  But if this macro is used in GNU gettext, and GNU
240        dnl gettext is already preinstalled in libintl, we update this
241        dnl libintl.  (Cf. the install rule in intl/Makefile.in.)
242        if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \
243           || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \
244                && test "$PACKAGE" != gettext-runtime \
245                && test "$PACKAGE" != gettext-tools; }; then
246          gt_use_preinstalled_gnugettext=yes
247        else
248          dnl Reset the values set by searching for libintl.
249          LIBINTL=
250          LTLIBINTL=
251          INCINTL=
252        fi
253
254    ifelse(gt_included_intl, yes, [
255        if test "$gt_use_preinstalled_gnugettext" != "yes"; then
256          dnl GNU gettext is not found in the C library.
257          dnl Fall back on included GNU gettext library.
258          nls_cv_use_gnu_gettext=yes
259        fi
260      fi
261
262      if test "$nls_cv_use_gnu_gettext" = "yes"; then
263        dnl Mark actions used to generate GNU NLS library.
264        BUILD_INCLUDED_LIBINTL=yes
265        USE_INCLUDED_LIBINTL=yes
266        LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LIBICONV $LIBTHREAD"
267        LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.[]gt_libtool_suffix_prefix[]a $LTLIBICONV $LTLIBTHREAD"
268        LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'`
269      fi
270
271      CATOBJEXT=
272      if test "$gt_use_preinstalled_gnugettext" = "yes" \
273         || test "$nls_cv_use_gnu_gettext" = "yes"; then
274        dnl Mark actions to use GNU gettext tools.
275        CATOBJEXT=.gmo
276      fi
277    ])
278
279    if test -n "$INTL_MACOSX_LIBS"; then
280      if test "$gt_use_preinstalled_gnugettext" = "yes" \
281         || test "$nls_cv_use_gnu_gettext" = "yes"; then
282        dnl Some extra flags are needed during linking.
283        LIBINTL="$LIBINTL $INTL_MACOSX_LIBS"
284        LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS"
285      fi
286    fi
287
288    if test "$gt_use_preinstalled_gnugettext" = "yes" \
289       || test "$nls_cv_use_gnu_gettext" = "yes"; then
290      AC_DEFINE([ENABLE_NLS], [1],
291        [Define to 1 if translation of program messages to the user's native language
292   is requested.])
293    else
294      USE_NLS=no
295    fi
296  fi
297
298  AC_MSG_CHECKING([whether to use NLS])
299  AC_MSG_RESULT([$USE_NLS])
300  if test "$USE_NLS" = "yes"; then
301    AC_MSG_CHECKING([where the gettext function comes from])
302    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
303      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
304        gt_source="external libintl"
305      else
306        gt_source="libc"
307      fi
308    else
309      gt_source="included intl directory"
310    fi
311    AC_MSG_RESULT([$gt_source])
312  fi
313
314  if test "$USE_NLS" = "yes"; then
315
316    if test "$gt_use_preinstalled_gnugettext" = "yes"; then
317      if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then
318        AC_MSG_CHECKING([how to link with libintl])
319        AC_MSG_RESULT([$LIBINTL])
320        AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL])
321      fi
322
323      dnl For backward compatibility. Some packages may be using this.
324      AC_DEFINE([HAVE_GETTEXT], [1],
325       [Define if the GNU gettext() function is already present or preinstalled.])
326      AC_DEFINE([HAVE_DCGETTEXT], [1],
327       [Define if the GNU dcgettext() function is already present or preinstalled.])
328    fi
329
330    dnl We need to process the po/ directory.
331    POSUB=po
332  fi
333
334  ifelse(gt_included_intl, yes, [
335    dnl If this is used in GNU gettext we have to set BUILD_INCLUDED_LIBINTL
336    dnl to 'yes' because some of the testsuite requires it.
337    if test "$PACKAGE" = gettext-runtime || test "$PACKAGE" = gettext-tools; then
338      BUILD_INCLUDED_LIBINTL=yes
339    fi
340
341    dnl Make all variables we use known to autoconf.
342    AC_SUBST([BUILD_INCLUDED_LIBINTL])
343    AC_SUBST([USE_INCLUDED_LIBINTL])
344    AC_SUBST([CATOBJEXT])
345
346    dnl For backward compatibility. Some configure.ins may be using this.
347    nls_cv_header_intl=
348    nls_cv_header_libgt=
349
350    dnl For backward compatibility. Some Makefiles may be using this.
351    DATADIRNAME=share
352    AC_SUBST([DATADIRNAME])
353
354    dnl For backward compatibility. Some Makefiles may be using this.
355    INSTOBJEXT=.mo
356    AC_SUBST([INSTOBJEXT])
357
358    dnl For backward compatibility. Some Makefiles may be using this.
359    GENCAT=gencat
360    AC_SUBST([GENCAT])
361
362    dnl For backward compatibility. Some Makefiles may be using this.
363    INTLOBJS=
364    if test "$USE_INCLUDED_LIBINTL" = yes; then
365      INTLOBJS="\$(GETTOBJS)"
366    fi
367    AC_SUBST([INTLOBJS])
368
369    dnl Enable libtool support if the surrounding package wishes it.
370    INTL_LIBTOOL_SUFFIX_PREFIX=gt_libtool_suffix_prefix
371    AC_SUBST([INTL_LIBTOOL_SUFFIX_PREFIX])
372  ])
373
374  dnl For backward compatibility. Some Makefiles may be using this.
375  INTLLIBS="$LIBINTL"
376  AC_SUBST([INTLLIBS])
377
378  dnl Make all documented variables known to autoconf.
379  AC_SUBST([LIBINTL])
380  AC_SUBST([LTLIBINTL])
381  AC_SUBST([POSUB])
382])
383
384
385dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized.
386m4_define([gt_NEEDS_INIT],
387[
388  m4_divert_text([DEFAULTS], [gt_needs=])
389  m4_define([gt_NEEDS_INIT], [])
390])
391
392
393dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
394AC_DEFUN([AM_GNU_GETTEXT_NEED],
395[
396  m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"])
397])
398
399
400dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version])
401AC_DEFUN([AM_GNU_GETTEXT_VERSION], [])
402