3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
27 AC_MSG_NOTICE([OS config directory is $os_include_dir])
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src doc po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
63 toplevel_srcdir=${glibcxx_srcdir}/..
64 AC_SUBST(glibcxx_builddir)
65 AC_SUBST(glibcxx_srcdir)
66 AC_SUBST(toplevel_srcdir)
68 # We use these options to decide which functions to include. They are
69 # set from the top level.
70 AC_ARG_WITH([target-subdir],
71 AC_HELP_STRING([--with-target-subdir=SUBDIR],
72 [configuring in a subdirectory]))
74 AC_ARG_WITH([cross-host],
75 AC_HELP_STRING([--with-cross-host=HOST],
76 [configuring with a cross compiler]))
79 AC_HELP_STRING([--with-newlib],
80 [assume newlib as a system C library]))
82 # We're almost certainly being configured before anything else which uses
83 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
84 # we not cache the value of CXX that we "discover" here, because it's set
85 # to something unique for us and libjava. Other target libraries need to
86 # find CXX for themselves. We yank the rug out from under the normal AC_*
87 # process by sneakily renaming the cache variable. This also lets us debug
88 # the value of "our" CXX in postmortems.
90 # We must also force CXX to /not/ be a precious variable, otherwise the
91 # wrong (non-multilib-adjusted) value will be used in multilibs. This
92 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
93 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
94 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
96 # -fno-builtin must be present here so that a non-conflicting form of
97 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
99 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
100 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
101 m4_define([_AC_ARG_VAR_PRECIOUS],[])
102 save_CXXFLAGS="$CXXFLAGS"
103 CXXFLAGS="$CXXFLAGS -fno-builtin"
106 CXXFLAGS="$save_CXXFLAGS"
107 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
111 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
112 # available). Uncomment the next line to force a particular method.
116 AC_CHECK_TOOL(AS, as)
117 AC_CHECK_TOOL(AR, ar)
118 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
122 # Set up safe default values for all subsequent AM_CONDITIONAL tests
123 # which are themselves conditionally expanded.
124 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
125 ## other macros from doing the same. This should be automated.) -pme
128 # Check for uClibc since Linux platforms use different configuration
129 # directories depending on the C library in use.
130 AC_EGREP_CPP([_using_uclibc], [
135 ], uclibc=yes, uclibc=no)
137 # Find platform-specific directories containing configuration info.
138 # Also possibly modify flags used elsewhere, as needed by the platform.
144 dnl Tests for newer compiler features, or features that are present in newer
145 dnl compiler versions but not older compiler versions still in use, should
149 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
150 dnl new inlining code or the new system_header pragma will die on -Werror.
151 dnl Leave it out by default and use maint-mode to use it.
152 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
153 dnl compiler supports it and the user has not requested debug mode.
155 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
156 # All these tests are for C++; save the language and the compiler flags.
157 # The CXXFLAGS thing is suspicious, but based on similar bits previously
158 # found in GLIBCXX_CONFIGURE.
161 ac_test_CXXFLAGS="${CXXFLAGS+set}"
162 ac_save_CXXFLAGS="$CXXFLAGS"
164 # Check for maintainer-mode bits.
165 if test x"$USE_MAINTAINER_MODE" = xno; then
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$ac_test_CXXFLAGS" = set; then
176 CXXFLAGS="$ac_save_CXXFLAGS"
178 # this is the suspicious part
181 if test x"$ac_fdsections" = x"yes"; then
182 SECTION_FLAGS='-ffunction-sections -fdata-sections'
184 AC_MSG_RESULT($ac_fdsections)
188 AC_SUBST(SECTION_FLAGS)
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
203 dnl glibcxx_ld_is_gold (set to "no" or "yes")
204 dnl glibcxx_gnu_ld_version (possibly)
206 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
207 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
209 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
210 # If we're not using GNU ld, then there's no point in even trying these
211 # tests. Check for that first. We should have already tested for gld
212 # by now (in libtool), but require it now just to be safe...
213 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
214 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
215 AC_REQUIRE([AC_PROG_LD])
216 AC_REQUIRE([AC_PROG_AWK])
218 # The name set by libtool depends on the version of libtool. Shame on us
219 # for depending on an impl detail, but c'est la vie. Older versions used
220 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
221 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
222 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
223 # set (hence we're using an older libtool), then set it.
224 if test x${with_gnu_ld+set} != xset; then
225 if test x${ac_cv_prog_gnu_ld+set} != xset; then
226 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
229 with_gnu_ld=$ac_cv_prog_gnu_ld
233 # Start by getting the version number. I think the libtool test already
234 # does some of this, but throws away the result.
235 glibcxx_ld_is_gold=no
236 if test x"$with_gnu_ld" = x"yes"; then
237 AC_MSG_CHECKING([for ld version])
239 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
240 glibcxx_ld_is_gold=yes
242 ldver=`$LD --version 2>/dev/null | head -1 | \
243 sed -e 's/GNU \(go\)\{0,1\}ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\4/'`
245 glibcxx_gnu_ld_version=`echo $ldver | \
246 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
247 AC_MSG_RESULT($glibcxx_gnu_ld_version)
251 glibcxx_have_gc_sections=no
252 if test "$glibcxx_ld_is_gold" = "yes"; then
253 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
254 glibcxx_have_gc_sections=yes
257 glibcxx_gcsections_min_ld=21602
258 if test x"$with_gnu_ld" = x"yes" &&
259 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
260 glibcxx_have_gc_sections=yes
263 if test "$glibcxx_have_gc_sections" = "yes"; then
264 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
265 # NB: This flag only works reliably after 2.16.1. Configure tests
266 # for this are difficult, so hard wire a value that should work.
268 ac_test_CFLAGS="${CFLAGS+set}"
269 ac_save_CFLAGS="$CFLAGS"
270 CFLAGS='-Wl,--gc-sections'
272 # Check for -Wl,--gc-sections
273 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
274 AC_TRY_LINK([ int one(void) { return 1; }
275 int two(void) { return 2; }
276 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
277 if test "$ac_gcsections" = "yes"; then
280 if $CC -c conftest.c; then
281 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
282 grep "Warning: gc-sections option ignored" > /dev/null; then
286 rm -f conftest.c conftest.o conftest
288 if test "$ac_gcsections" = "yes"; then
289 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
291 AC_MSG_RESULT($ac_gcsections)
293 if test "$ac_test_CFLAGS" = set; then
294 CFLAGS="$ac_save_CFLAGS"
296 # this is the suspicious part
302 # Note this is only for shared objects.
304 if test x"$with_gnu_ld" = x"yes"; then
305 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
306 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
307 if test -n "$cxx_z_relo"; then
308 OPT_LDFLAGS="-Wl,-z,relro"
311 AC_MSG_RESULT($ac_ld_relro)
314 # Set linker optimization flags.
315 if test x"$with_gnu_ld" = x"yes"; then
316 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
319 AC_SUBST(SECTION_LDFLAGS)
320 AC_SUBST(OPT_LDFLAGS)
325 dnl Check for headers for, and arguments to, the setrlimit() function.
326 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
329 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
330 dnl various HAVE_LIMIT_* for individual limit names
332 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
333 AC_MSG_CHECKING([for RLIMIT_$1])
336 #include <sys/time.h>
337 #include <sys/resource.h>
339 [ int f = RLIMIT_$1 ; ],
340 [glibcxx_mresult=1], [glibcxx_mresult=0])
341 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
342 [Only used in build directory testsuite_hooks.h.])
343 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
347 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
348 setrlimit_have_headers=yes
349 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
351 [setrlimit_have_headers=no])
352 # If don't have the headers, then we can't run the tests now, and we
353 # won't be seeing any of these during testsuite compilation.
354 if test $setrlimit_have_headers = yes; then
355 # Can't do these in a loop, else the resulting syntax is wrong.
356 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
357 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
358 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
359 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
360 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
362 # Check for rlimit, setrlimit.
363 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
366 #include <sys/time.h>
367 #include <sys/resource.h>
371 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
375 AC_MSG_CHECKING([for testsuite resource limits support])
376 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
378 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
379 [Define if using setrlimit to set resource limits during
384 AC_MSG_RESULT($ac_res_limits)
389 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
390 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
392 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
393 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
394 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
396 [#include <sys/stat.h>],
399 S_ISREG(buffer.st_mode);],
400 [glibcxx_cv_S_ISREG=yes],
401 [glibcxx_cv_S_ISREG=no])
403 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
405 [#include <sys/stat.h>],
408 S_IFREG & buffer.st_mode;],
409 [glibcxx_cv_S_IFREG=yes],
410 [glibcxx_cv_S_IFREG=no])
413 if test $glibcxx_cv_S_ISREG = yes; then
414 AC_DEFINE(HAVE_S_ISREG, 1,
415 [Define if S_IFREG is available in <sys/stat.h>.])
417 elif test $glibcxx_cv_S_IFREG = yes; then
418 AC_DEFINE(HAVE_S_IFREG, 1,
419 [Define if S_IFREG is available in <sys/stat.h>.])
427 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
429 AC_DEFUN([GLIBCXX_CHECK_POLL], [
430 AC_MSG_CHECKING([for poll])
431 AC_CACHE_VAL(glibcxx_cv_POLL, [
434 [struct pollfd pfd[1];
435 pfd[0].events = POLLIN;
437 [glibcxx_cv_POLL=yes],
438 [glibcxx_cv_POLL=no])
440 if test $glibcxx_cv_POLL = yes; then
441 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
443 AC_MSG_RESULT($glibcxx_cv_POLL)
448 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
450 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
451 AC_MSG_CHECKING([for writev])
452 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
454 [#include <sys/uio.h>],
455 [struct iovec iov[2];
457 [glibcxx_cv_WRITEV=yes],
458 [glibcxx_cv_WRITEV=no])
460 if test $glibcxx_cv_WRITEV = yes; then
461 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
463 AC_MSG_RESULT($glibcxx_cv_WRITEV)
468 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
470 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
471 AC_MSG_CHECKING([for int64_t])
472 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
474 [#include <stdint.h>],
476 [glibcxx_cv_INT64_T=yes],
477 [glibcxx_cv_INT64_T=no])
479 if test $glibcxx_cv_INT64_T = yes; then
480 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
482 AC_MSG_RESULT($glibcxx_cv_INT64_T)
487 dnl Check whether LFS support is available.
489 AC_DEFUN([GLIBCXX_CHECK_LFS], [
492 ac_save_CXXFLAGS="$CXXFLAGS"
493 CXXFLAGS="$CXXFLAGS -fno-exceptions"
494 AC_MSG_CHECKING([for LFS support])
495 AC_CACHE_VAL(glibcxx_cv_LFS, [
499 #include <sys/stat.h>
503 fseeko64(fp, 0, SEEK_CUR);
505 lseek64(1, 0, SEEK_CUR);
508 [glibcxx_cv_LFS=yes],
511 if test $glibcxx_cv_LFS = yes; then
512 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
514 AC_MSG_RESULT($glibcxx_cv_LFS)
515 CXXFLAGS="$ac_save_CXXFLAGS"
521 dnl Check for whether a fully dynamic basic_string implementation should
522 dnl be turned on, that does not put empty objects in per-process static
523 dnl memory (mostly useful together with shared memory allocators, see PR
524 dnl libstdc++/16612 for details).
526 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
527 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
528 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
529 dnl Where DEFAULT is either `yes' or `no'.
531 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
532 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
533 if test $enable_fully_dynamic_string = yes; then
534 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
535 [Define if a fully dynamic basic_string is wanted.])
541 dnl Does any necessary configuration of the testsuite directory. Generates
542 dnl the testsuite_hooks.h header.
544 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
548 dnl GLIBCXX_TEST_WCHAR_T
549 dnl GLIBCXX_TEST_THREAD
553 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
554 if $GLIBCXX_IS_NATIVE ; then
555 # Do checks for resource limit functions.
556 GLIBCXX_CHECK_SETRLIMIT
558 # Look for setenv, so that extended locale tests can be performed.
559 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
562 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
563 test $enable_symvers != no; then
566 enable_abi_check=no ;;
568 enable_abi_check=yes ;;
571 # Only build this as native, since automake does not understand
576 # Export file names for ABI checking.
577 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
578 AC_SUBST(baseline_dir)
583 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
587 dnl TOPLEVEL_INCLUDES
589 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
590 # Used for every C++ compile we perform.
592 -I$glibcxx_builddir/include/$host_alias \
593 -I$glibcxx_builddir/include \
594 -I$glibcxx_srcdir/libsupc++"
596 # For Canadian crosses, pick this up too.
597 if test $CANADIAN = yes; then
598 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
601 # Stuff in the actual top level. Currently only used by libsupc++ to
602 # get unwind* headers from the gcc dir.
603 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
604 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
606 # Now, export this to all the little Makefiles....
607 AC_SUBST(GLIBCXX_INCLUDES)
608 AC_SUBST(TOPLEVEL_INCLUDES)
613 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
614 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
617 dnl OPTIMIZE_CXXFLAGS
620 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
621 # Optimization flags that are probably a good idea for thrill-seekers. Just
622 # uncomment the lines below and make, everything else is ready to go...
623 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
624 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
625 AC_SUBST(OPTIMIZE_CXXFLAGS)
627 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
633 dnl All installation directory information is determined here.
637 dnl glibcxx_prefixdir
638 dnl glibcxx_toolexecdir
639 dnl glibcxx_toolexeclibdir
641 dnl Assumes cross_compiling bits already done, and with_cross_host in
644 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
645 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
646 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
647 glibcxx_toolexecdir=no
648 glibcxx_toolexeclibdir=no
649 glibcxx_prefixdir=$prefix
651 AC_MSG_CHECKING([for gxx-include-dir])
652 AC_ARG_WITH([gxx-include-dir],
653 AC_HELP_STRING([--with-gxx-include-dir=DIR],
654 [installation directory for include files]),
656 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
657 no) gxx_include_dir=no ;;
658 *) gxx_include_dir=$withval ;;
660 [gxx_include_dir=no])
661 AC_MSG_RESULT($gxx_include_dir)
663 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
664 AC_ARG_ENABLE([version-specific-runtime-libs],
665 AC_HELP_STRING([--enable-version-specific-runtime-libs],
666 [Specify that runtime libraries should be installed in a compiler-specific directory]),
667 [case "$enableval" in
668 yes) version_specific_libs=yes ;;
669 no) version_specific_libs=no ;;
670 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
672 [version_specific_libs=no])
673 AC_MSG_RESULT($version_specific_libs)
675 # Default case for install directory for include files.
676 if test $version_specific_libs = no && test $gxx_include_dir = no; then
677 gxx_include_dir='include/c++/${gcc_version}'
678 if test -n "$with_cross_host" &&
679 test x"$with_cross_host" != x"no"; then
680 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
682 gxx_include_dir='${prefix}/'"$gxx_include_dir"
686 # Version-specific runtime libs processing.
687 if test $version_specific_libs = yes; then
688 # Need the gcc compiler version to know where to install libraries
689 # and header files if --enable-version-specific-runtime-libs option
690 # is selected. FIXME: these variables are misnamed, there are
691 # no executables installed in _toolexecdir or _toolexeclibdir.
692 if test x"$gxx_include_dir" = x"no"; then
693 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
695 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
696 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
699 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
700 # Install a library built with a cross compiler in tooldir, not libdir.
701 if test x"$glibcxx_toolexecdir" = x"no"; then
702 if test -n "$with_cross_host" &&
703 test x"$with_cross_host" != x"no"; then
704 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
705 glibcxx_toolexeclibdir='${toolexecdir}/lib'
707 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
708 glibcxx_toolexeclibdir='${libdir}'
710 multi_os_directory=`$CXX -print-multi-os-directory`
711 case $multi_os_directory in
712 .) ;; # Avoid trailing /.
713 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
717 AC_MSG_CHECKING([for install location])
718 AC_MSG_RESULT($gxx_include_dir)
720 AC_SUBST(glibcxx_prefixdir)
721 AC_SUBST(gxx_include_dir)
722 AC_SUBST(glibcxx_toolexecdir)
723 AC_SUBST(glibcxx_toolexeclibdir)
729 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
730 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
731 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
733 dnl See docs/html/17_intro/configury.html#enable for documentation.
735 m4_define([GLIBCXX_ENABLE],[dnl
736 m4_define([_g_switch],[--enable-$1])dnl
737 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
738 AC_ARG_ENABLE($1,_g_help,
743 m4_bpatsubst([$5],[permit ])) ;;
744 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
745 dnl Idea for future: generate a URL pointing to
746 dnl "onlinedocs/configopts.html#whatever"
753 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
757 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
758 m4_undefine([_g_switch])dnl
759 m4_undefine([_g_help])dnl
764 dnl Check for ISO/IEC 9899:1999 "C99" support.
766 dnl --enable-c99 defines _GLIBCXX_USE_C99
767 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
768 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
769 dnl Where DEFAULT is either `yes' or `no'.
770 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
772 AC_DEFUN([GLIBCXX_ENABLE_C99], [
773 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
775 if test x"$enable_c99" = x"yes"; then
780 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
781 # undefined and fake C99 facilities - like pre-standard snprintf - may be
782 # spuriously enabled.
783 # Long term, -std=c++0x could be even better, could manage to explicitely
784 # request C99 facilities to the underlying C headers.
785 ac_save_CXXFLAGS="$CXXFLAGS"
786 CXXFLAGS="$CXXFLAGS -std=c++98"
788 ac_save_gcc_no_link="$gcc_no_link"
790 if test x$gcc_no_link != xyes; then
791 # Use -fno-exceptions to that the C driver can link these tests without
792 # hitting undefined references to personality routines.
793 CXXFLAGS="$CXXFLAGS -fno-exceptions"
794 AC_CHECK_LIB(m, sin, [
797 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
802 # Check for the existence of <math.h> functions used if C99 is enabled.
803 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
804 AC_CACHE_VAL(glibcxx_cv_c99_math, [
805 GCC_TRY_COMPILE_OR_LINK(
807 volatile double d1, d2;
815 i = isgreater(d1, d2);
816 i = isgreaterequal(d1, d2);
818 i = islessequal(d1, d2);
819 i = islessgreater(d1, d2);
820 i = islessgreater(d1, d2);
821 i = isunordered(d1, d2);
822 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
824 AC_MSG_RESULT($glibcxx_cv_c99_math)
825 if test x"$glibcxx_cv_c99_math" = x"yes"; then
826 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
827 [Define if C99 functions or macros in <math.h> should be imported
828 in <cmath> in namespace std.])
831 # Check for the existence of <complex.h> complex math functions.
832 # This is necessary even though libstdc++ uses the builtin versions
833 # of these functions, because if the builtin cannot be used, a reference
834 # to the library function is emitted.
835 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
836 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
837 glibcxx_cv_c99_complex=no;
838 if test x"$ac_has_complex_h" = x"yes"; then
839 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
840 GCC_TRY_COMPILE_OR_LINK(
841 [#include <complex.h>
842 typedef __complex__ float float_type;
843 typedef __complex__ double double_type;
844 typedef __complex__ long double ld_type;
845 volatile float_type tmpf;
846 volatile double_type tmpd;
847 volatile ld_type tmpld;
850 volatile long double ld;],
862 tmpf = cpowf(tmpf, tmpf);
875 tmpd = cpow(tmpd, tmpd);
879 tmpld = ccosl(tmpld);
880 tmpld = ccoshl(tmpld);
881 tmpld = cexpl(tmpld);
882 tmpld = clogl(tmpld);
883 tmpld = csinl(tmpld);
884 tmpld = csinhl(tmpld);
885 tmpld = csqrtl(tmpld);
886 tmpld = ctanl(tmpld);
887 tmpld = ctanhl(tmpld);
888 tmpld = cpowl(tmpld, tmpld);
889 tmpld = cprojl(tmpld);
890 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
892 AC_MSG_RESULT($glibcxx_cv_c99_complex)
893 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
894 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
895 [Define if C99 functions in <complex.h> should be used in
896 <complex>. Using compiler builtins for these functions requires
897 corresponding C99 library functions to be present.])
900 # Check for the existence in <stdio.h> of vscanf, et. al.
901 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
902 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
903 GCC_TRY_COMPILE_OR_LINK(
906 void foo(char* fmt, ...)
908 va_list args; va_start(args, fmt);
909 vfscanf(stderr, "%i", args);
911 vsnprintf(fmt, 0, "%i", args);
912 vsscanf(fmt, "%i", args);
914 [snprintf("12", 0, "%i");],
915 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
917 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
919 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
920 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
921 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
922 GCC_TRY_COMPILE_OR_LINK(
925 volatile long double ld;
926 volatile unsigned long long ll;
929 f = strtof("gnu", &tmp);
930 ld = strtold("gnu", &tmp);
931 ll = strtoll("gnu", &tmp, 10);
932 ll = strtoull("gnu", &tmp, 10);
934 mydivt = lldiv(10,1);
939 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
941 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
943 # Check for the existence in <wchar.h> of wcstold, etc.
944 glibcxx_cv_c99_wchar=no;
945 if test x"$ac_has_wchar_h" = xyes &&
946 test x"$ac_has_wctype_h" = xyes; then
947 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
948 AC_TRY_COMPILE([#include <wchar.h>
955 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
957 # Checks for wide character functions that may not be present.
958 # Injection of these is wrapped with guard macros.
959 # NB: only put functions here, instead of immediately above, if
960 # absolutely necessary.
961 AC_TRY_COMPILE([#include <wchar.h>
962 namespace test { using ::vfwscanf; } ], [],
963 [AC_DEFINE(HAVE_VFWSCANF,1,
964 [Defined if vfwscanf exists.])],[])
966 AC_TRY_COMPILE([#include <wchar.h>
967 namespace test { using ::vswscanf; } ], [],
968 [AC_DEFINE(HAVE_VSWSCANF,1,
969 [Defined if vswscanf exists.])],[])
971 AC_TRY_COMPILE([#include <wchar.h>
972 namespace test { using ::vwscanf; } ], [],
973 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
975 AC_TRY_COMPILE([#include <wchar.h>
976 namespace test { using ::wcstof; } ], [],
977 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
979 AC_TRY_COMPILE([#include <wctype.h>],
980 [ wint_t t; int i = iswblank(t);],
981 [AC_DEFINE(HAVE_ISWBLANK,1,
982 [Defined if iswblank exists.])],[])
984 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
987 # Option parsed, now set things appropriately.
988 if test x"$glibcxx_cv_c99_math" = x"no" ||
989 test x"$glibcxx_cv_c99_complex" = x"no" ||
990 test x"$glibcxx_cv_c99_stdio" = x"no" ||
991 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
992 test x"$glibcxx_cv_c99_wchar" = x"no"; then
995 AC_DEFINE(_GLIBCXX_USE_C99, 1,
996 [Define if C99 functions or macros from <wchar.h>, <math.h>,
997 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1000 gcc_no_link="$ac_save_gcc_no_link"
1001 LIBS="$ac_save_LIBS"
1002 CXXFLAGS="$ac_save_CXXFLAGS"
1006 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1007 AC_MSG_RESULT($enable_c99)
1012 dnl Check for IEEE Std 1003.1-2001 clock_gettime required for
1013 dnl 20.8.5 [time.clock] in the current C++0X working draft.
1015 AC_DEFUN([GLIBCXX_CHECK_CLOCK_GETTIME], [
1019 ac_save_CXXFLAGS="$CXXFLAGS"
1020 ac_save_LIBS="$LIBS"
1022 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1024 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1026 case "$ac_cv_search_clock_gettime" in
1027 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1030 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1032 ac_has_clock_monotonic=no;
1033 ac_has_clock_realtime=no;
1034 if test x"$ac_has_unistd_h" = x"yes"; then
1035 AC_MSG_CHECKING([for monotonic clock])
1037 [#include <unistd.h>
1040 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1043 clock_gettime(CLOCK_MONOTONIC, &tp);
1044 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1046 AC_MSG_RESULT($ac_has_clock_monotonic)
1048 AC_MSG_CHECKING([for realtime clock])
1050 [#include <unistd.h>
1053 [#if _POSIX_TIMERS > 0
1056 clock_gettime(CLOCK_REALTIME, &tp);
1057 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1059 AC_MSG_RESULT($ac_has_clock_realtime)
1062 if test x"$ac_has_clock_monotonic" = x"yes"; then
1063 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1064 [ Defined if clock_gettime has monotonic clock support. ])
1067 if test x"$ac_has_clock_realtime" = x"yes"; then
1068 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1069 [ Defined if clock_gettime has realtime clock support. ])
1072 AC_SUBST(GLIBCXX_LIBS)
1074 CXXFLAGS="$ac_save_CXXFLAGS"
1075 LIBS="$ac_save_LIBS"
1080 dnl Check for IEEE Std 1003.1-2001 gettimeofday required for
1081 dnl 20.8.5 [time.clock] in the current C++0X working draft.
1083 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1087 ac_save_CXXFLAGS="$CXXFLAGS"
1088 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1090 ac_has_gettimeofday=no;
1091 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1092 if test x"$ac_has_sys_time_h" = x"yes"; then
1093 AC_MSG_CHECKING([for gettimeofday])
1094 AC_TRY_LINK([#include <sys/time.h>],
1095 [timeval tv; gettimeofday(&tv, 0);],
1096 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1098 AC_MSG_RESULT($ac_has_gettimeofday)
1101 if test x"$ac_has_gettimeofday" = x"yes"; then
1102 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1103 [ Defined if gettimeofday is available. ])
1106 CXXFLAGS="$ac_save_CXXFLAGS"
1111 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1112 dnl facilities in Chapter 8, "C compatibility".
1114 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1119 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1120 # undefined and fake C99 facilities may be spuriously enabled.
1121 ac_save_CXXFLAGS="$CXXFLAGS"
1122 CXXFLAGS="$CXXFLAGS -std=c++98"
1124 # Check for the existence of <complex.h> complex math functions used
1126 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1127 ac_c99_complex_tr1=no;
1128 if test x"$ac_has_complex_h" = x"yes"; then
1129 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1130 AC_TRY_COMPILE([#include <complex.h>],
1131 [typedef __complex__ float float_type; float_type tmpf;
1138 typedef __complex__ double double_type; double_type tmpd;
1145 typedef __complex__ long double ld_type; ld_type tmpld;
1152 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1154 AC_MSG_RESULT($ac_c99_complex_tr1)
1155 if test x"$ac_c99_complex_tr1" = x"yes"; then
1156 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1157 [Define if C99 functions in <complex.h> should be used in
1158 <tr1/complex>. Using compiler builtins for these functions
1159 requires corresponding C99 library functions to be present.])
1162 # Check for the existence of <ctype.h> functions.
1163 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1164 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1165 AC_TRY_COMPILE([#include <ctype.h>],
1169 ],[glibcxx_cv_c99_ctype_tr1=yes], [glibcxx_cv_c99_ctype_tr1=no])
1171 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1172 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1173 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1174 [Define if C99 functions in <ctype.h> should be imported in
1175 <tr1/cctype> in namespace std::tr1.])
1178 # Check for the existence of <fenv.h> functions.
1179 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1181 if test x"$ac_has_fenv_h" = x"yes"; then
1182 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1183 AC_TRY_COMPILE([#include <fenv.h>],
1188 ret = feclearexcept(except);
1189 ret = fegetexceptflag(pflag, except);
1190 ret = feraiseexcept(except);
1191 ret = fesetexceptflag(pflag, except);
1192 ret = fetestexcept(except);
1194 ret = fesetround(mode);
1195 ret = fegetenv(penv);
1196 ret = feholdexcept(penv);
1197 ret = fesetenv(penv);
1198 ret = feupdateenv(penv);
1199 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1201 AC_MSG_RESULT($ac_c99_fenv_tr1)
1202 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1203 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1204 [Define if C99 functions in <fenv.h> should be imported in
1205 <tr1/cfenv> in namespace std::tr1.])
1208 # Check for the existence of <stdint.h> types.
1209 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1210 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1211 AC_TRY_COMPILE([#include <stdint.h>],
1212 [typedef int8_t my_int8_t;
1213 typedef int16_t my_int16_t;
1214 typedef int32_t my_int32_t;
1215 typedef int64_t my_int64_t;
1216 typedef int_fast8_t my_int_fast8_t;
1217 typedef int_fast16_t my_int_fast16_t;
1218 typedef int_fast32_t my_int_fast32_t;
1219 typedef int_fast64_t my_int_fast64_t;
1220 typedef int_least8_t my_int_least8_t;
1221 typedef int_least16_t my_int_least16_t;
1222 typedef int_least32_t my_int_least32_t;
1223 typedef int_least64_t my_int_least64_t;
1224 typedef intmax_t my_intmax_t;
1225 typedef intptr_t my_intptr_t;
1226 typedef uint8_t my_uint8_t;
1227 typedef uint16_t my_uint16_t;
1228 typedef uint32_t my_uint32_t;
1229 typedef uint64_t my_uint64_t;
1230 typedef uint_fast8_t my_uint_fast8_t;
1231 typedef uint_fast16_t my_uint_fast16_t;
1232 typedef uint_fast32_t my_uint_fast32_t;
1233 typedef uint_fast64_t my_uint_fast64_t;
1234 typedef uint_least8_t my_uint_least8_t;
1235 typedef uint_least16_t my_uint_least16_t;
1236 typedef uint_least32_t my_uint_least32_t;
1237 typedef uint_least64_t my_uint_least64_t;
1238 typedef uintmax_t my_uintmax_t;
1239 typedef uintptr_t my_uintptr_t;
1240 ],[glibcxx_cv_c99_stdint_tr1=yes], [glibcxx_cv_c99_stdint_tr1=no])
1242 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1243 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1244 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1245 [Define if C99 types in <stdint.h> should be imported in
1246 <tr1/cstdint> in namespace std::tr1.])
1249 # Check for the existence of <math.h> functions.
1250 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1251 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1252 AC_TRY_COMPILE([#include <math.h>],
1253 [typedef double_t my_double_t;
1254 typedef float_t my_float_t;
1268 copysignf(0.0f, 0.0f);
1269 copysignl(0.0l, 0.0l);
1286 fmaf(0.0f, 0.0f, 0.0f);
1287 fmal(0.0l, 0.0l, 0.0l);
1330 nextafter(0.0, 0.0);
1331 nextafterf(0.0f, 0.0f);
1332 nextafterl(0.0l, 0.0l);
1333 nexttoward(0.0, 0.0);
1334 nexttowardf(0.0f, 0.0f);
1335 nexttowardl(0.0l, 0.0l);
1336 remainder(0.0, 0.0);
1337 remainderf(0.0f, 0.0f);
1338 remainderl(0.0l, 0.0l);
1339 remquo(0.0, 0.0, 0);
1340 remquo(0.0f, 0.0f, 0);
1341 remquo(0.0l, 0.0l, 0);
1360 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1362 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1363 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1364 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1365 [Define if C99 functions or macros in <math.h> should be imported
1366 in <tr1/cmath> in namespace std::tr1.])
1369 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1370 # sense if the previous check fails, per C99, 7.8/1).
1371 ac_c99_inttypes_tr1=no;
1372 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1373 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1374 AC_TRY_COMPILE([#include <inttypes.h>],
1375 [intmax_t i, numer, denom, base;
1378 intmax_t ret = imaxabs(i);
1379 imaxdiv_t dret = imaxdiv(numer, denom);
1380 ret = strtoimax(s, endptr, base);
1381 uintmax_t uret = strtoumax(s, endptr, base);
1382 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1384 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1385 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1386 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1387 [Define if C99 functions in <inttypes.h> should be imported in
1388 <tr1/cinttypes> in namespace std::tr1.])
1391 # Check for the existence of the <stdbool.h> header.
1392 AC_CHECK_HEADERS(stdbool.h)
1394 CXXFLAGS="$ac_save_CXXFLAGS"
1399 dnl Check whether "dev/random" and "dev/urandom" are available for the
1400 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1402 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1404 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1405 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1406 AC_TRY_RUN([#include <stdio.h>
1409 return !(fopen("/dev/random", "r")
1410 && fopen("/dev/urandom", "r"));
1413 [glibcxx_cv_random_tr1=yes], [glibcxx_cv_random_tr1=no],
1414 [glibcxx_cv_random_tr1=no])
1416 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1417 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1418 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1419 [Define if dev/random and dev/urandom are available for
1420 the random_device of TR1 (Chapter 5.1).])
1426 dnl Check whether macros, etc are present for <system_error>
1428 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1430 m4_pushdef([n_syserr], [1])dnl
1431 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1432 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1433 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1434 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1435 AC_MSG_CHECKING([for syserr])
1436 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1437 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1438 [int i = syserr;])],
1439 [glibcxx_cv_system_error[]n_syserr=yes],
1440 [glibcxx_cv_system_error[]n_syserr=no])
1442 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1443 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1444 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1446 m4_define([n_syserr], m4_incr(n_syserr))dnl
1447 m4_popdef([SYSERR])dnl
1449 m4_popdef([n_syserr])dnl
1453 dnl Check whether C++200x's standard layout types are supported.
1455 AC_DEFUN([GLIBCXX_CHECK_STANDARD_LAYOUT], [
1457 AC_MSG_CHECKING([for ISO C++200x standard layout type support])
1458 AC_CACHE_VAL(ac_standard_layout, [
1461 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1462 ac_save_CXXFLAGS="$CXXFLAGS"
1463 CXXFLAGS='-std=gnu++0x'
1465 AC_TRY_COMPILE([struct b
1469 // Need standard layout relaxation from POD
1471 b& operator=(const b&);
1480 [ac_standard_layout=yes], [ac_standard_layout=no])
1482 CXXFLAGS="$ac_save_CXXFLAGS"
1485 AC_MSG_RESULT($ac_standard_layout)
1486 if test x"$ac_standard_layout" = x"yes"; then
1487 AC_DEFINE(_GLIBCXX_USE_STANDARD_LAYOUT, 1,
1488 [Define if standard layout types are supported in C++200x.])
1493 dnl Check for what type of C headers to use.
1495 dnl --enable-cheaders= [does stuff].
1496 dnl --disable-cheaders [does not do anything, really].
1497 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1498 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1500 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1501 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1502 [construct "C" headers for g++], [permit c|c_std|c_global])
1503 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1505 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1507 # Allow overrides to configure.host here.
1508 if test $enable_cheaders = c_global; then
1512 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1516 AC_SUBST(C_INCLUDE_DIR)
1517 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1518 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1519 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1520 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1521 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1526 dnl Check for which locale library to use. The choice is mapped to
1527 dnl a subdirectory of config/locale.
1529 dnl Default is generic.
1531 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1532 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1533 [use MODEL for target locale package],
1534 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1536 # Deal with gettext issues. Default to not using it (=no) until we detect
1537 # support for it later. Let the user turn it off via --e/d, but let that
1538 # default to on for easier handling.
1541 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1545 # Either a known packaage, or "auto"
1546 if test $enable_clocale = no || test $enable_clocale = yes; then
1549 enable_clocale_flag=$enable_clocale
1551 # Probe for locale model to use if none specified.
1552 # Default to "generic".
1553 if test $enable_clocale_flag = auto; then
1554 case ${target_os} in
1555 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1556 enable_clocale_flag=gnu
1559 enable_clocale_flag=darwin
1562 enable_clocale_flag=generic
1567 # Sanity check model, and test for special functionality.
1568 if test $enable_clocale_flag = gnu; then
1569 AC_EGREP_CPP([_GLIBCXX_ok], [
1570 #include <features.h>
1571 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1574 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1576 if test $enable_clocale = auto; then
1577 # Test for bugs early in glibc-2.2.x series
1579 #define _GNU_SOURCE 1
1582 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1583 extern __typeof(newlocale) __newlocale;
1584 extern __typeof(duplocale) __duplocale;
1585 extern __typeof(strcoll_l) __strcoll_l;
1589 const char __one[] = "Äuglein Augmen";
1590 const char __two[] = "Äuglein";
1595 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1596 loc_dup = __duplocale(loc);
1597 i = __strcoll_l(__one, __two, loc);
1598 j = __strcoll_l(__one, __two, loc_dup);
1602 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1603 [enable_clocale_flag=generic])
1606 # Set it to scream when it hurts.
1607 ac_save_CFLAGS="$CFLAGS"
1608 CFLAGS="-Wimplicit-function-declaration -Werror"
1610 # Use strxfrm_l if available.
1611 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1613 #include <locale.h>],
1614 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1615 AC_DEFINE(HAVE_STRXFRM_L, 1,
1616 [Define if strxfrm_l is available in <string.h>.]),)
1618 # Use strerror_l if available.
1619 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1621 #include <locale.h>],
1622 [__locale_t loc; strerror_l(5, loc);],
1623 AC_DEFINE(HAVE_STRERROR_L, 1,
1624 [Define if strerror_l is available in <string.h>.]),)
1626 CFLAGS="$ac_save_CFLAGS"
1629 # Perhaps use strerror_r if available, and strerror_l isn't.
1630 ac_save_CFLAGS="$CFLAGS"
1631 CFLAGS="-Wimplicit-function-declaration -Werror"
1632 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1634 #include <locale.h>],
1635 [char s[128]; strerror_r(5, s, 128);],
1636 AC_DEFINE(HAVE_STRERROR_R, 1,
1637 [Define if strerror_r is available in <string.h>.]),)
1638 CFLAGS="$ac_save_CFLAGS"
1640 # Set configure bits for specified locale package
1641 AC_MSG_CHECKING([for C locale to use])
1642 case ${enable_clocale_flag} in
1644 AC_MSG_RESULT(generic)
1646 CLOCALE_H=config/locale/generic/c_locale.h
1647 CLOCALE_CC=config/locale/generic/c_locale.cc
1648 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1649 CCOLLATE_CC=config/locale/generic/collate_members.cc
1650 CCTYPE_CC=config/locale/generic/ctype_members.cc
1651 CMESSAGES_H=config/locale/generic/messages_members.h
1652 CMESSAGES_CC=config/locale/generic/messages_members.cc
1653 CMONEY_CC=config/locale/generic/monetary_members.cc
1654 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1655 CTIME_H=config/locale/generic/time_members.h
1656 CTIME_CC=config/locale/generic/time_members.cc
1657 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1660 AC_MSG_RESULT(darwin or freebsd)
1662 CLOCALE_H=config/locale/generic/c_locale.h
1663 CLOCALE_CC=config/locale/generic/c_locale.cc
1664 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1665 CCOLLATE_CC=config/locale/generic/collate_members.cc
1666 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1667 CMESSAGES_H=config/locale/generic/messages_members.h
1668 CMESSAGES_CC=config/locale/generic/messages_members.cc
1669 CMONEY_CC=config/locale/generic/monetary_members.cc
1670 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1671 CTIME_H=config/locale/generic/time_members.h
1672 CTIME_CC=config/locale/generic/time_members.cc
1673 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1679 # Declare intention to use gettext, and add support for specific
1681 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1684 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1685 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1686 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1689 # Export the build objects.
1690 for ling in $ALL_LINGUAS; do \
1691 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1692 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1694 AC_SUBST(glibcxx_MOFILES)
1695 AC_SUBST(glibcxx_POFILES)
1697 CLOCALE_H=config/locale/gnu/c_locale.h
1698 CLOCALE_CC=config/locale/gnu/c_locale.cc
1699 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1700 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1701 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1702 CMESSAGES_H=config/locale/gnu/messages_members.h
1703 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1704 CMONEY_CC=config/locale/gnu/monetary_members.cc
1705 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1706 CTIME_H=config/locale/gnu/time_members.h
1707 CTIME_CC=config/locale/gnu/time_members.cc
1708 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1711 AC_MSG_RESULT(IEEE 1003.1)
1713 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1714 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1715 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1716 CCOLLATE_CC=config/locale/generic/collate_members.cc
1717 CCTYPE_CC=config/locale/generic/ctype_members.cc
1718 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1719 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1720 CMONEY_CC=config/locale/generic/monetary_members.cc
1721 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1722 CTIME_H=config/locale/generic/time_members.h
1723 CTIME_CC=config/locale/generic/time_members.cc
1724 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1728 # This is where the testsuite looks for locale catalogs, using the
1729 # -DLOCALEDIR define during testsuite compilation.
1730 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1731 AC_SUBST(glibcxx_localedir)
1733 # A standalone libintl (e.g., GNU libintl) may be in use.
1734 if test $USE_NLS = yes; then
1735 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1736 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1738 if test $USE_NLS = yes; then
1739 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1740 [Define if NLS translations are to be used.])
1745 AC_SUBST(CMESSAGES_H)
1746 AC_SUBST(CCODECVT_CC)
1747 AC_SUBST(CCOLLATE_CC)
1749 AC_SUBST(CMESSAGES_CC)
1751 AC_SUBST(CNUMERIC_CC)
1754 AC_SUBST(CLOCALE_CC)
1755 AC_SUBST(CLOCALE_INTERNAL_H)
1760 dnl Check for which std::allocator base class to use. The choice is
1761 dnl mapped from a subdirectory of include/ext.
1765 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1766 AC_MSG_CHECKING([for std::allocator base class])
1767 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1768 [use KIND for target std::allocator base],
1769 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1771 # If they didn't use this option switch, or if they specified --enable
1772 # with no specific model, we'll have to look for one. If they
1773 # specified --disable (???), do likewise.
1774 if test $enable_libstdcxx_allocator = no ||
1775 test $enable_libstdcxx_allocator = yes;
1777 enable_libstdcxx_allocator=auto
1780 # Either a known package, or "auto". Auto implies the default choice
1781 # for a particular platform.
1782 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1784 # Probe for host-specific support if no specific model is specified.
1786 if test $enable_libstdcxx_allocator_flag = auto; then
1787 case ${target_os} in
1788 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1789 enable_libstdcxx_allocator_flag=new
1792 enable_libstdcxx_allocator_flag=new
1796 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1799 # Set configure bits for specified locale package
1800 case ${enable_libstdcxx_allocator_flag} in
1802 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1803 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1806 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1807 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1810 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1811 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1814 ALLOCATOR_H=config/allocator/new_allocator_base.h
1815 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1818 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1819 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1823 AC_SUBST(ALLOCATOR_H)
1824 AC_SUBST(ALLOCATOR_NAME)
1829 dnl Check for whether the Boost-derived checks should be turned on.
1831 dnl --enable-concept-checks turns them on.
1832 dnl --disable-concept-checks leaves them off.
1833 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1834 dnl Where DEFAULT is either `yes' or `no'.
1836 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1837 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1838 if test $enable_concept_checks = yes; then
1839 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1840 [Define to use concept checking code from the boost libraries.])
1845 dnl Check for parallel mode pre-requisites, including OpenMP support.
1847 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1849 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1853 # See if configured libgomp/omp.h exists. (libgomp may be in
1854 # noconfigdirs but not explicitly disabled.)
1855 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1856 enable_parallel=yes;
1858 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1861 AC_MSG_CHECKING([for parallel mode support])
1862 AC_MSG_RESULT([$enable_parallel])
1863 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1868 dnl Check for which I/O library to use: stdio, or something specific.
1870 dnl Default is stdio.
1872 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1873 AC_MSG_CHECKING([for underlying I/O to use])
1874 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1875 [use target-specific I/O package], [permit stdio])
1877 # Now that libio has been removed, you can have any color you want as long
1878 # as it's black. This is one big no-op until other packages are added, but
1879 # showing the framework never hurts.
1880 case ${enable_cstdio} in
1882 CSTDIO_H=config/io/c_io_stdio.h
1883 BASIC_FILE_H=config/io/basic_file_stdio.h
1884 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1885 AC_MSG_RESULT(stdio)
1890 AC_SUBST(BASIC_FILE_H)
1891 AC_SUBST(BASIC_FILE_CC)
1896 dnl Check for "unusual" flags to pass to the compiler while building.
1898 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1899 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1900 dnl --disable-cxx-flags passes nothing.
1901 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1902 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1903 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1904 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1905 dnl If "default flags" is an empty string, the effect is the same
1906 dnl as --disable or --enable=no.
1908 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1909 AC_MSG_CHECKING([for extra compiler flags for building])
1910 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1911 [pass compiler FLAGS when building library],
1912 [case "x$enable_cxx_flags" in
1913 xno | x) enable_cxx_flags= ;;
1915 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1918 # Run through flags (either default or command-line) and set anything
1919 # extra (e.g., #defines) that must accompany particular g++ options.
1920 if test -n "$enable_cxx_flags"; then
1921 for f in $enable_cxx_flags; do
1925 *) # and we're trying to pass /what/ exactly?
1926 AC_MSG_ERROR([compiler flags start with a -]) ;;
1931 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1932 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1933 AC_SUBST(EXTRA_CXX_FLAGS)
1938 dnl Check to see if debugging libraries are to be built.
1940 dnl --enable-libstdcxx-debug
1941 dnl builds a separate set of debugging libraries in addition to the
1942 dnl normal (shared, static) libstdc++ binaries.
1944 dnl --disable-libstdcxx-debug
1945 dnl builds only one (non-debug) version of libstdc++.
1947 dnl --enable-libstdcxx-debug-flags=FLAGS
1948 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1950 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1951 dnl Where DEFAULT is either `yes' or `no'.
1953 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1954 AC_MSG_CHECKING([for additional debug build])
1955 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1956 AC_MSG_RESULT($enable_libstdcxx_debug)
1957 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1962 dnl Check for explicit debug flags.
1964 dnl --enable-libstdcxx-debug-flags='-O1'
1965 dnl is a general method for passing flags to be used when
1966 dnl building debug libraries with --enable-debug.
1968 dnl --disable-libstdcxx-debug-flags does nothing.
1969 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1970 dnl If "default flags" is an empty string, the effect is the same
1971 dnl as --disable or --enable=no.
1973 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1974 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1975 [pass compiler FLAGS when building debug library],
1976 [case "x$enable_libstdcxx_debug_flags" in
1977 xno | x) enable_libstdcxx_debug_flags= ;;
1979 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1982 # Option parsed, now set things appropriately
1983 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1984 AC_SUBST(DEBUG_FLAGS)
1986 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1991 dnl Check if the user only wants a freestanding library implementation.
1993 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1994 dnl installing only the headers required by [17.4.1.3] and the language
1995 dnl support library. More than that will be built (to keep the Makefiles
1996 dnl conveniently clean), but not installed.
1999 dnl is_hosted (yes/no)
2002 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2004 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2005 AC_ARG_ENABLE([hosted-libstdcxx],
2006 AC_HELP_STRING([--disable-hosted-libstdcxx],
2007 [only build freestanding C++ runtime support]),,
2010 enable_hosted_libstdcxx=no
2013 enable_hosted_libstdcxx=yes
2016 if test "$enable_hosted_libstdcxx" = no; then
2017 AC_MSG_NOTICE([Only freestanding libraries will be built])
2021 enable_libstdcxx_pch=no
2026 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2027 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2028 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2033 dnl Check for template specializations for the 'long long' type.
2034 dnl The result determines only whether 'long long' I/O is enabled; things
2035 dnl like numeric_limits<> specializations are always available.
2037 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2038 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2039 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2040 dnl Where DEFAULT is either `yes' or `no'.
2042 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2043 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2044 if test $enable_long_long = yes; then
2045 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2046 [Define if code specialized for long long should be used.])
2048 AC_MSG_CHECKING([for enabled long long specializations])
2049 AC_MSG_RESULT([$enable_long_long])
2054 dnl Check for template specializations for the 'wchar_t' type.
2056 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2057 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2058 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2059 dnl Where DEFAULT is either `yes' or `no'.
2061 dnl Necessary support must also be present.
2063 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2064 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2066 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2067 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2068 AC_MSG_CHECKING([for mbstate_t])
2069 AC_TRY_COMPILE([#include <wchar.h>],
2070 [mbstate_t teststate;],
2071 have_mbstate_t=yes, have_mbstate_t=no)
2072 AC_MSG_RESULT($have_mbstate_t)
2073 if test x"$have_mbstate_t" = xyes; then
2074 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2077 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2079 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2081 if test x"$enable_wchar_t" = x"yes"; then
2086 if test x"$ac_has_wchar_h" = xyes &&
2087 test x"$ac_has_wctype_h" = xyes; then
2088 AC_TRY_COMPILE([#include <wchar.h>
2149 ],[],[], [enable_wchar_t=no])
2157 if test x"$enable_wchar_t" = x"yes"; then
2158 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2159 [Define if code specialized for wchar_t should be used.])
2162 AC_MSG_CHECKING([for enabled wchar_t specializations])
2163 AC_MSG_RESULT([$enable_wchar_t])
2168 dnl Check to see if building and using a C++ precompiled header can be done.
2170 dnl --enable-libstdcxx-pch=yes
2171 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2172 dnl may work, after some light-hearted attempts to puzzle out compiler
2173 dnl support, flip bits on in include/Makefile.am
2175 dnl --disable-libstdcxx-pch
2176 dnl turns off attempts to use or build stdc++.h.gch.
2179 dnl glibcxx_PCHFLAGS
2181 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2182 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2183 if test $enable_libstdcxx_pch = yes; then
2184 AC_CACHE_CHECK([for compiler with PCH support],
2185 [glibcxx_cv_prog_CXX_pch],
2186 [ac_save_CXXFLAGS="$CXXFLAGS"
2187 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2190 echo '#include <math.h>' > conftest.h
2191 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2192 -o conftest.h.gch 1>&5 2>&1 &&
2193 echo '#error "pch failed"' > conftest.h &&
2194 echo '#include "conftest.h"' > conftest.cc &&
2195 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2197 glibcxx_cv_prog_CXX_pch=yes
2199 glibcxx_cv_prog_CXX_pch=no
2202 CXXFLAGS=$ac_save_CXXFLAGS
2205 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2208 AC_MSG_CHECKING([for enabled PCH])
2209 AC_MSG_RESULT([$enable_libstdcxx_pch])
2211 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2212 if test $enable_libstdcxx_pch = yes; then
2213 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2217 AC_SUBST(glibcxx_PCHFLAGS)
2222 dnl Check for atomic builtins.
2224 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2226 dnl This checks to see if the host supports the compiler-generated
2227 dnl builtins for atomic operations for various integral sizes. Note, this
2228 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2229 dnl that are used should be checked.
2232 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2233 dnl see: CHECK_SYNC_FETCH_AND_ADD
2236 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2237 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2239 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2242 old_CXXFLAGS="$CXXFLAGS"
2244 # Compile unoptimized.
2247 # Fake what AC_TRY_COMPILE does, without linking as this is
2248 # unnecessary for a builtins test.
2250 cat > conftest.$ac_ext << EOF
2251 [#]line __oline__ "configure"
2254 // NB: _Atomic_word not necessarily int.
2255 typedef int atomic_type;
2258 const atomic_type c3(0);
2259 __sync_fetch_and_add(&c1, c2);
2260 __sync_val_compare_and_swap(&c1, c3, c2);
2261 __sync_lock_test_and_set(&c1, c3);
2262 __sync_lock_release(&c1);
2263 __sync_synchronize();
2268 AC_MSG_CHECKING([for atomic builtins for int])
2269 if AC_TRY_EVAL(ac_compile); then
2270 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2271 enable_atomic_builtinsi=no
2273 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2274 [Define if builtin atomic operations for int are supported on this host.])
2275 enable_atomic_builtinsi=yes
2278 AC_MSG_RESULT($enable_atomic_builtinsi)
2281 cat > conftest.$ac_ext << EOF
2282 [#]line __oline__ "configure"
2285 typedef bool atomic_type;
2288 const atomic_type c3(0);
2289 __sync_fetch_and_add(&c1, c2);
2290 __sync_val_compare_and_swap(&c1, c3, c2);
2291 __sync_lock_test_and_set(&c1, c3);
2292 __sync_lock_release(&c1);
2293 __sync_synchronize();
2298 AC_MSG_CHECKING([for atomic builtins for bool])
2299 if AC_TRY_EVAL(ac_compile); then
2300 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2301 enable_atomic_builtinsb=no
2303 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2304 [Define if builtin atomic operations for bool are supported on this host.])
2305 enable_atomic_builtinsb=yes
2308 AC_MSG_RESULT($enable_atomic_builtinsb)
2311 CXXFLAGS="$old_CXXFLAGS"
2314 # Set atomicity_dir to builtins if either of above tests pass.
2315 if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
2316 atomicity_dir=cpu/generic/atomicity_builtins
2319 # If still generic, set to mutex.
2320 if test $atomicity_dir = "cpu/generic" ; then
2321 atomicity_dir=cpu/generic/atomicity_mutex
2322 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2323 if test $target_thread_file = single; then
2324 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2325 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2327 AC_MSG_WARN([They will be faked using a mutex.])
2328 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2336 dnl Check for exception handling support. If an explicit enable/disable
2337 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2338 dnl target may or may not support call frame exceptions.
2340 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2341 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2342 dnl Neither one forces an attempt at detection.
2345 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2347 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2348 AC_MSG_CHECKING([for exception model to use])
2351 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2352 [force use of builtin_setjmp for exceptions],
2353 [permit yes|no|auto])
2355 if test $enable_sjlj_exceptions = auto; then
2356 # Botheration. Now we've got to detect the exception model. Link tests
2357 # against libgcc.a are problematic since we've not been given proper -L
2358 # bits for single-tree newlib and libgloss.
2360 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2361 cat > conftest.$ac_ext << EOF
2362 [#]line __oline__ "configure"
2371 old_CXXFLAGS="$CXXFLAGS"
2373 if AC_TRY_EVAL(ac_compile); then
2374 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2375 enable_sjlj_exceptions=yes
2376 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2377 enable_sjlj_exceptions=no
2378 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2379 enable_sjlj_exceptions=no
2382 CXXFLAGS="$old_CXXFLAGS"
2386 # This is a tad weird, for hysterical raisins. We have to map
2387 # enable/disable to two different models.
2388 case $enable_sjlj_exceptions in
2390 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2391 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2392 ac_exception_model_name=sjlj
2395 ac_exception_model_name="call frame"
2398 AC_MSG_ERROR([unable to detect exception model])
2402 AC_MSG_RESULT($ac_exception_model_name)
2407 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2409 dnl --enable-visibility enables attempt to use visibility attributes.
2410 dnl --disable-visibility turns off all use of visibility attributes.
2411 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2412 dnl Where DEFAULT is 'yes'.
2414 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2415 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2417 if test x$enable_visibility = xyes ; then
2418 dnl all hail libgfortran
2419 dnl Check whether the target supports hidden visibility.
2420 AC_CACHE_CHECK([whether the target supports hidden visibility],
2421 glibcxx_cv_have_attribute_visibility, [
2422 save_CFLAGS="$CFLAGS"
2423 CFLAGS="$CFLAGS -Werror"
2424 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2425 [], glibcxx_cv_have_attribute_visibility=yes,
2426 glibcxx_cv_have_attribute_visibility=no)
2427 CFLAGS="$save_CFLAGS"])
2428 if test $glibcxx_cv_have_attribute_visibility = no; then
2429 enable_visibility=no
2433 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2434 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2439 dnl Add version tags to symbols in shared library (or not), additionally
2440 dnl marking other symbols as private/local (or not).
2442 dnl --enable-symvers=style adds a version script to the linker call when
2443 dnl creating the shared library. The choice of version script is
2444 dnl controlled by 'style'.
2445 dnl --disable-symvers does not.
2446 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2447 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2448 dnl choose a default style based on linker characteristics. Passing
2449 dnl 'no' disables versioning.
2451 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2453 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2454 [enables symbol versioning of the shared library],
2455 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2457 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2458 # don't know enough about $LD to do tricks...
2459 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2461 # Turn a 'yes' into a suitable default.
2462 if test x$enable_symvers = xyes ; then
2463 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2466 if test $with_gnu_ld = yes ; then
2469 case ${target_os} in
2471 enable_symvers=darwin ;;
2473 enable_symvers=no ;;
2479 # Check to see if 'darwin' or 'darwin-export' can win.
2480 if test x$enable_symvers = xdarwin-export ; then
2481 enable_symvers=darwin
2484 # Check to see if 'gnu' can win.
2485 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2486 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2487 AC_MSG_CHECKING([for shared libgcc])
2488 ac_save_CFLAGS="$CFLAGS"
2490 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2491 CFLAGS="$ac_save_CFLAGS"
2492 if test $glibcxx_shared_libgcc = no; then
2493 cat > conftest.c <<EOF
2494 int main (void) { return 0; }
2497 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2498 -shared -shared-libgcc -o conftest.so \
2499 conftest.c -v 2>&1 >/dev/null \
2500 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2502 rm -f conftest.c conftest.so
2503 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2504 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2505 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2506 CFLAGS="$ac_save_CFLAGS"
2509 AC_MSG_RESULT($glibcxx_shared_libgcc)
2511 # For GNU ld, we need at least this version. The format is described in
2512 # GLIBCXX_CHECK_LINKER_FEATURES above.
2513 glibcxx_min_gnu_ld_version=21400
2515 # If no shared libgcc, can't win.
2516 if test $glibcxx_shared_libgcc != yes; then
2517 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2518 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2519 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2521 elif test $with_gnu_ld != yes ; then
2523 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2524 AC_MSG_WARN([=== you are not using the GNU linker.])
2525 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2527 elif test $glibcxx_ld_is_gold = yes ; then
2528 : All versions of gold support symbol versioning.
2529 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2530 # The right tools, the right setup, but too old. Fallbacks?
2531 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2532 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2533 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2534 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2535 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2540 # Everything parsed; figure out what file to use.
2541 case $enable_symvers in
2543 SYMVER_FILE=config/abi/pre/none.ver
2546 SYMVER_FILE=config/abi/pre/gnu.ver
2547 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2548 [Define to use GNU versioning in the shared library.])
2550 gnu-versioned-namespace)
2551 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2552 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2553 [Define to use GNU namespace versioning in the shared library.])
2556 SYMVER_FILE=config/abi/pre/gnu.ver
2557 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2558 [Define to use darwin versioning in the shared library.])
2562 if test x$enable_symvers != xno ; then
2563 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2564 [Define to use symbol versioning in the shared library.])
2567 AC_SUBST(SYMVER_FILE)
2568 AC_SUBST(port_specific_symbol_files)
2569 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2570 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2571 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2572 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2573 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2575 # Now, set up compatibility support, if any.
2576 # In addition, need this to deal with std::size_t mangling in
2577 # src/compatibility.cc. In a perfect world, could use
2578 # typeid(std::size_t).name()[0] to do direct substitution.
2579 AC_MSG_CHECKING([for size_t as unsigned int])
2580 ac_save_CFLAGS="$CFLAGS"
2582 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2583 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2584 CFLAGS=$ac_save_CFLAGS
2585 if test "$glibcxx_size_t_is_i" = yes; then
2586 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2588 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2590 AC_MSG_CHECKING([for ptrdiff_t as int])
2591 ac_save_CFLAGS="$CFLAGS"
2593 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2594 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2595 CFLAGS=$ac_save_CFLAGS
2596 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2597 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2599 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2604 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2605 dnl We must stage the required headers so that they will be installed
2606 dnl with the library (unlike libgcc, the STL implementation is provided
2607 dnl solely within headers). Since we must not inject random user-space
2608 dnl macro names into user-provided C++ code, we first stage into <file>-in
2609 dnl and process to <file> with an output command. The reason for a two-
2610 dnl stage process here is to correctly handle $srcdir!=$objdir without
2611 dnl having to write complex code (the sed commands to clean the macro
2612 dnl namespace are complex and fragile enough as it is). We must also
2613 dnl add a relative path so that -I- is supported properly.
2616 dnl glibcxx_thread_h
2619 dnl HAVE_GTHR_DEFAULT
2621 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2622 AC_MSG_CHECKING([for thread model used by GCC])
2623 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2624 AC_MSG_RESULT([$target_thread_file])
2626 if test $target_thread_file != single; then
2627 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2628 [Define if gthr-default.h exists
2629 (meaning that threading support is enabled).])
2632 glibcxx_thread_h=gthr-$target_thread_file.h
2634 dnl Check for __GTHREADS define.
2635 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2636 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2642 AC_SUBST(glibcxx_thread_h)
2646 # Check whether LC_MESSAGES is available in <locale.h>.
2647 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2649 # This file file be copied and used freely without restrictions. It can
2650 # be used in projects which are not available under the GNU Public License
2651 # but which still want to provide support for the GNU gettext functionality.
2652 # Please note that the actual code is *not* freely available.
2653 AC_DEFUN([AC_LC_MESSAGES], [
2654 AC_CHECK_HEADER(locale.h, [
2655 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2656 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2657 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2658 if test $ac_cv_val_LC_MESSAGES = yes; then
2659 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2660 [Define if LC_MESSAGES is available in <locale.h>.])
2665 # Macros from the top-level gcc directory.
2666 m4_include([../config/tls.m4])