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], [])
421