package/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], [])