1# gettext.m4 serial 70 (gettext-0.20) 2dnl Copyright (C) 1995-2014, 2016, 2018 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 must be one of 'external', 'use-libtool'. 24dnl INTLSYMBOL should be 'external' for packages other than GNU gettext, and 25dnl 'use-libtool' for the packages 'gettext-runtime' and 'gettext-tools'. 26dnl If INTLSYMBOL is 'use-libtool', then a libtool library 27dnl $(top_builddir)/intl/libintl.la will be created (shared and/or static, 28dnl depending on --{enable,disable}-{shared,static} and on the presence of 29dnl AM-DISABLE-SHARED). 30dnl If NEEDSYMBOL is specified and is 'need-ngettext', then GNU gettext 31dnl implementations (in libc or libintl) without the ngettext() function 32dnl will be ignored. If NEEDSYMBOL is specified and is 33dnl 'need-formatstring-macros', then GNU gettext implementations that don't 34dnl support the ISO C 99 <inttypes.h> formatstring macros will be ignored. 35dnl INTLDIR is used to find the intl libraries. If empty, 36dnl the value '$(top_builddir)/intl/' is used. 37dnl 38dnl The result of the configuration is one of three cases: 39dnl 1) GNU gettext, as included in the intl subdirectory, will be compiled 40dnl and used. 41dnl Catalog format: GNU --> install in $(datadir) 42dnl Catalog extension: .mo after installation, .gmo in source tree 43dnl 2) GNU gettext has been found in the system's C library. 44dnl Catalog format: GNU --> install in $(datadir) 45dnl Catalog extension: .mo after installation, .gmo in source tree 46dnl 3) No internationalization, always use English msgid. 47dnl Catalog format: none 48dnl Catalog extension: none 49dnl If INTLSYMBOL is 'external', only cases 2 and 3 can occur. 50dnl The use of .gmo is historical (it was needed to avoid overwriting the 51dnl GNU format catalogs when building on a platform with an X/Open gettext), 52dnl but we keep it in order not to force irrelevant filename changes on the 53dnl maintainers. 54dnl 55AC_DEFUN([AM_GNU_GETTEXT], 56[ 57 dnl Argument checking. 58 ifelse([$1], [], , [ifelse([$1], [external], , [ifelse([$1], [use-libtool], , 59 [errprint([ERROR: invalid first argument to AM_GNU_GETTEXT 60])])])]) 61 ifelse(ifelse([$1], [], [old])[]ifelse([$1], [no-libtool], [old]), [old], 62 [errprint([ERROR: Use of AM_GNU_GETTEXT without [external] argument is no longer supported. 63])]) 64 ifelse([$2], [], , [ifelse([$2], [need-ngettext], , [ifelse([$2], [need-formatstring-macros], , 65 [errprint([ERROR: invalid second argument to AM_GNU_GETTEXT 66])])])]) 67 define([gt_included_intl], 68 ifelse([$1], [external], [no], [yes])) 69 gt_NEEDS_INIT 70 AM_GNU_GETTEXT_NEED([$2]) 71 72 AC_REQUIRE([AM_PO_SUBDIRS])dnl 73 ifelse(gt_included_intl, yes, [ 74 AC_REQUIRE([AM_INTL_SUBDIR])dnl 75 ]) 76 77 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY. 78 AC_REQUIRE([AC_LIB_PREPARE_PREFIX]) 79 AC_REQUIRE([AC_LIB_RPATH]) 80 81 dnl Sometimes libintl requires libiconv, so first search for libiconv. 82 dnl Ideally we would do this search only after the 83 dnl if test "$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 not documented, we avoid it. 91 ifelse(gt_included_intl, yes, , [ 92 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY]) 93 ]) 94 95 dnl Sometimes, on Mac OS X, libintl requires linking with CoreFoundation. 96 gt_INTL_MACOSX 97 98 dnl Set USE_NLS. 99 AC_REQUIRE([AM_NLS]) 100 101 ifelse(gt_included_intl, yes, [ 102 BUILD_INCLUDED_LIBINTL=no 103 USE_INCLUDED_LIBINTL=no 104 ]) 105 LIBINTL= 106 LTLIBINTL= 107 POSUB= 108 109 dnl Add a version number to the cache macros. 110 case " $gt_needs " in 111 *" need-formatstring-macros "*) gt_api_version=3 ;; 112 *" need-ngettext "*) gt_api_version=2 ;; 113 *) gt_api_version=1 ;; 114 esac 115 gt_func_gnugettext_libc="gt_cv_func_gnugettext${gt_api_version}_libc" 116 gt_func_gnugettext_libintl="gt_cv_func_gnugettext${gt_api_version}_libintl" 117 118 dnl If we use NLS figure out what method 119 if test "$USE_NLS" = "yes"; then 120 gt_use_preinstalled_gnugettext=no 121 ifelse(gt_included_intl, yes, [ 122 AC_MSG_CHECKING([whether included gettext is requested]) 123 AC_ARG_WITH([included-gettext], 124 [ --with-included-gettext use the GNU gettext library included here], 125 nls_cv_force_use_gnu_gettext=$withval, 126 nls_cv_force_use_gnu_gettext=no) 127 AC_MSG_RESULT([$nls_cv_force_use_gnu_gettext]) 128 129 nls_cv_use_gnu_gettext="$nls_cv_force_use_gnu_gettext" 130 if test "$nls_cv_force_use_gnu_gettext" != "yes"; then 131 ]) 132 dnl User does not insist on using GNU NLS library. Figure out what 133 dnl to use. If GNU gettext is available we use this. Else we have 134 dnl to fall back to GNU NLS library. 135 136 if test $gt_api_version -ge 3; then 137 gt_revision_test_code=' 138#ifndef __GNU_GETTEXT_SUPPORTED_REVISION 139#define __GNU_GETTEXT_SUPPORTED_REVISION(major) ((major) == 0 ? 0 : -1) 140#endif 141changequote(,)dnl 142typedef int array [2 * (__GNU_GETTEXT_SUPPORTED_REVISION(0) >= 1) - 1]; 143changequote([,])dnl 144' 145 else 146 gt_revision_test_code= 147 fi 148 if test $gt_api_version -ge 2; then 149 gt_expression_test_code=' + * ngettext ("", "", 0)' 150 else 151 gt_expression_test_code= 152 fi 153 154 AC_CACHE_CHECK([for GNU gettext in libc], [$gt_func_gnugettext_libc], 155 [AC_LINK_IFELSE( 156 [AC_LANG_PROGRAM( 157 [[ 158#include <libintl.h> 159#ifndef __GNU_GETTEXT_SUPPORTED_REVISION 160extern int _nl_msg_cat_cntr; 161extern int *_nl_domain_bindings; 162#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_domain_bindings) 163#else 164#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0 165#endif 166$gt_revision_test_code 167 ]], 168 [[ 169bindtextdomain ("", ""); 170return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION 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 $LIBINTL" 191 dnl Now see whether libintl exists and does not depend on libiconv. 192 AC_LINK_IFELSE( 193 [AC_LANG_PROGRAM( 194 [[ 195#include <libintl.h> 196#ifndef __GNU_GETTEXT_SUPPORTED_REVISION 197extern int _nl_msg_cat_cntr; 198extern 199#ifdef __cplusplus 200"C" 201#endif 202const char *_nl_expand_alias (const char *); 203#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias ("")) 204#else 205#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0 206#endif 207$gt_revision_test_code 208 ]], 209 [[ 210bindtextdomain ("", ""); 211return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION 212 ]])], 213 [eval "$gt_func_gnugettext_libintl=yes"], 214 [eval "$gt_func_gnugettext_libintl=no"]) 215 dnl Now see whether libintl exists and depends on libiconv. 216 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" != yes; } && test -n "$LIBICONV"; then 217 LIBS="$LIBS $LIBICONV" 218 AC_LINK_IFELSE( 219 [AC_LANG_PROGRAM( 220 [[ 221#include <libintl.h> 222#ifndef __GNU_GETTEXT_SUPPORTED_REVISION 223extern int _nl_msg_cat_cntr; 224extern 225#ifdef __cplusplus 226"C" 227#endif 228const char *_nl_expand_alias (const char *); 229#define __GNU_GETTEXT_SYMBOL_EXPRESSION (_nl_msg_cat_cntr + *_nl_expand_alias ("")) 230#else 231#define __GNU_GETTEXT_SYMBOL_EXPRESSION 0 232#endif 233$gt_revision_test_code 234 ]], 235 [[ 236bindtextdomain ("", ""); 237return * gettext ("")$gt_expression_test_code + __GNU_GETTEXT_SYMBOL_EXPRESSION 238 ]])], 239 [LIBINTL="$LIBINTL $LIBICONV" 240 LTLIBINTL="$LTLIBINTL $LTLIBICONV" 241 eval "$gt_func_gnugettext_libintl=yes" 242 ]) 243 fi 244 CPPFLAGS="$gt_save_CPPFLAGS" 245 LIBS="$gt_save_LIBS"]) 246 fi 247 248 dnl If an already present or preinstalled GNU gettext() is found, 249 dnl use it. But if this macro is used in GNU gettext, and GNU 250 dnl gettext is already preinstalled in libintl, we update this 251 dnl libintl. (Cf. the install rule in intl/Makefile.in.) 252 if { eval "gt_val=\$$gt_func_gnugettext_libc"; test "$gt_val" = "yes"; } \ 253 || { { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; } \ 254 && test "$PACKAGE" != gettext-runtime \ 255 && test "$PACKAGE" != gettext-tools; }; then 256 gt_use_preinstalled_gnugettext=yes 257 else 258 dnl Reset the values set by searching for libintl. 259 LIBINTL= 260 LTLIBINTL= 261 INCINTL= 262 fi 263 264 ifelse(gt_included_intl, yes, [ 265 if test "$gt_use_preinstalled_gnugettext" != "yes"; then 266 dnl GNU gettext is not found in the C library. 267 dnl Fall back on included GNU gettext library. 268 nls_cv_use_gnu_gettext=yes 269 fi 270 fi 271 272 if test "$nls_cv_use_gnu_gettext" = "yes"; then 273 dnl Mark actions used to generate GNU NLS library. 274 BUILD_INCLUDED_LIBINTL=yes 275 USE_INCLUDED_LIBINTL=yes 276 LIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.la $LIBICONV $LIBTHREAD" 277 LTLIBINTL="ifelse([$3],[],\${top_builddir}/intl,[$3])/libintl.la $LTLIBICONV $LTLIBTHREAD" 278 LIBS=`echo " $LIBS " | sed -e 's/ -lintl / /' -e 's/^ //' -e 's/ $//'` 279 fi 280 281 CATOBJEXT= 282 if test "$gt_use_preinstalled_gnugettext" = "yes" \ 283 || test "$nls_cv_use_gnu_gettext" = "yes"; then 284 dnl Mark actions to use GNU gettext tools. 285 CATOBJEXT=.gmo 286 fi 287 ]) 288 289 if test -n "$INTL_MACOSX_LIBS"; then 290 if test "$gt_use_preinstalled_gnugettext" = "yes" \ 291 || test "$nls_cv_use_gnu_gettext" = "yes"; then 292 dnl Some extra flags are needed during linking. 293 LIBINTL="$LIBINTL $INTL_MACOSX_LIBS" 294 LTLIBINTL="$LTLIBINTL $INTL_MACOSX_LIBS" 295 fi 296 fi 297 298 if test "$gt_use_preinstalled_gnugettext" = "yes" \ 299 || test "$nls_cv_use_gnu_gettext" = "yes"; then 300 AC_DEFINE([ENABLE_NLS], [1], 301 [Define to 1 if translation of program messages to the user's native language 302 is requested.]) 303 else 304 USE_NLS=no 305 fi 306 fi 307 308 AC_MSG_CHECKING([whether to use NLS]) 309 AC_MSG_RESULT([$USE_NLS]) 310 if test "$USE_NLS" = "yes"; then 311 AC_MSG_CHECKING([where the gettext function comes from]) 312 if test "$gt_use_preinstalled_gnugettext" = "yes"; then 313 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then 314 gt_source="external libintl" 315 else 316 gt_source="libc" 317 fi 318 else 319 gt_source="included intl directory" 320 fi 321 AC_MSG_RESULT([$gt_source]) 322 fi 323 324 if test "$USE_NLS" = "yes"; then 325 326 if test "$gt_use_preinstalled_gnugettext" = "yes"; then 327 if { eval "gt_val=\$$gt_func_gnugettext_libintl"; test "$gt_val" = "yes"; }; then 328 AC_MSG_CHECKING([how to link with libintl]) 329 AC_MSG_RESULT([$LIBINTL]) 330 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCINTL]) 331 fi 332 333 dnl For backward compatibility. Some packages may be using this. 334 AC_DEFINE([HAVE_GETTEXT], [1], 335 [Define if the GNU gettext() function is already present or preinstalled.]) 336 AC_DEFINE([HAVE_DCGETTEXT], [1], 337 [Define if the GNU dcgettext() function is already present or preinstalled.]) 338 fi 339 340 dnl We need to process the po/ directory. 341 POSUB=po 342 fi 343 344 ifelse(gt_included_intl, yes, [ 345 dnl In GNU gettext we have to set BUILD_INCLUDED_LIBINTL to 'yes' 346 dnl because some of the testsuite requires it. 347 BUILD_INCLUDED_LIBINTL=yes 348 349 dnl Make all variables we use known to autoconf. 350 AC_SUBST([BUILD_INCLUDED_LIBINTL]) 351 AC_SUBST([USE_INCLUDED_LIBINTL]) 352 AC_SUBST([CATOBJEXT]) 353 ]) 354 355 dnl For backward compatibility. Some Makefiles may be using this. 356 INTLLIBS="$LIBINTL" 357 AC_SUBST([INTLLIBS]) 358 359 dnl Make all documented variables known to autoconf. 360 AC_SUBST([LIBINTL]) 361 AC_SUBST([LTLIBINTL]) 362 AC_SUBST([POSUB]) 363]) 364 365 366dnl gt_NEEDS_INIT ensures that the gt_needs variable is initialized. 367m4_define([gt_NEEDS_INIT], 368[ 369 m4_divert_text([DEFAULTS], [gt_needs=]) 370 m4_define([gt_NEEDS_INIT], []) 371]) 372 373 374dnl Usage: AM_GNU_GETTEXT_NEED([NEEDSYMBOL]) 375AC_DEFUN([AM_GNU_GETTEXT_NEED], 376[ 377 m4_divert_text([INIT_PREPARE], [gt_needs="$gt_needs $1"]) 378]) 379 380 381dnl Usage: AM_GNU_GETTEXT_VERSION([gettext-version]) 382AC_DEFUN([AM_GNU_GETTEXT_VERSION], []) 383 384 385dnl Usage: AM_GNU_GETTEXT_REQUIRE_VERSION([gettext-version]) 386AC_DEFUN([AM_GNU_GETTEXT_REQUIRE_VERSION], []) 387