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="$CXXFLAGS"
1020 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1022 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1024 ac_has_clock_monotonic=no;
1025 ac_has_clock_realtime=no;
1026 if test x"$ac_has_unistd_h" = x"yes"; then
1027 AC_MSG_CHECKING([for monotonic clock])
1029 [#include <unistd.h>
1032 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1035 clock_gettime(CLOCK_MONOTONIC, &tp);
1036 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1038 AC_MSG_RESULT($ac_has_clock_monotonic)
1040 AC_MSG_CHECKING([for realtime clock])
1042 [#include <unistd.h>
1045 [#if _POSIX_TIMERS > 0
1048 clock_gettime(CLOCK_REALTIME, &tp);
1049 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1051 AC_MSG_RESULT($ac_has_clock_realtime)
1054 if test x"$ac_has_clock_monotonic" = x"yes"; then
1055 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1056 [ Defined if clock_gettime has monotonic clock support. ])
1059 if test x"$ac_has_clock_realtime" = x"yes"; then
1060 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1061 [ Defined if clock_gettime has realtime clock support. ])
1064 CXXFLAGS="$ac_save_CXXFLAGS"
1069 dnl Check for IEEE Std 1003.1-2001 gettimeofday required for
1070 dnl 20.8.5 [time.clock] in the current C++0X working draft.
1072 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1076 ac_save_CXXFLAGS="$CXXFLAGS"
1077 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1079 ac_has_gettimeofday=no;
1080 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1081 if test x"$ac_has_sys_time_h" = x"yes"; then
1082 AC_MSG_CHECKING([for gettimeofday])
1083 AC_TRY_LINK([#include <sys/time.h>],
1084 [timeval tv; gettimeofday(&tv, 0);],
1085 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1087 AC_MSG_RESULT($ac_has_gettimeofday)
1090 if test x"$ac_has_gettimeofday" = x"yes"; then
1091 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1092 [ Defined if gettimeofday is available. ])
1095 CXXFLAGS="$ac_save_CXXFLAGS"
1100 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1101 dnl facilities in Chapter 8, "C compatibility".
1103 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1108 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1109 # undefined and fake C99 facilities may be spuriously enabled.
1110 ac_save_CXXFLAGS="$CXXFLAGS"
1111 CXXFLAGS="$CXXFLAGS -std=c++98"
1113 # Check for the existence of <complex.h> complex math functions used
1115 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1116 ac_c99_complex_tr1=no;
1117 if test x"$ac_has_complex_h" = x"yes"; then
1118 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1119 AC_TRY_COMPILE([#include <complex.h>],
1120 [typedef __complex__ float float_type; float_type tmpf;
1127 typedef __complex__ double double_type; double_type tmpd;
1134 typedef __complex__ long double ld_type; ld_type tmpld;
1141 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1143 AC_MSG_RESULT($ac_c99_complex_tr1)
1144 if test x"$ac_c99_complex_tr1" = x"yes"; then
1145 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1146 [Define if C99 functions in <complex.h> should be used in
1147 <tr1/complex>. Using compiler builtins for these functions
1148 requires corresponding C99 library functions to be present.])
1151 # Check for the existence of <ctype.h> functions.
1152 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1153 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1154 AC_TRY_COMPILE([#include <ctype.h>],
1158 ],[glibcxx_cv_c99_ctype_tr1=yes], [glibcxx_cv_c99_ctype_tr1=no])
1160 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1161 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1162 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1163 [Define if C99 functions in <ctype.h> should be imported in
1164 <tr1/cctype> in namespace std::tr1.])
1167 # Check for the existence of <fenv.h> functions.
1168 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1170 if test x"$ac_has_fenv_h" = x"yes"; then
1171 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1172 AC_TRY_COMPILE([#include <fenv.h>],
1177 ret = feclearexcept(except);
1178 ret = fegetexceptflag(pflag, except);
1179 ret = feraiseexcept(except);
1180 ret = fesetexceptflag(pflag, except);
1181 ret = fetestexcept(except);
1183 ret = fesetround(mode);
1184 ret = fegetenv(penv);
1185 ret = feholdexcept(penv);
1186 ret = fesetenv(penv);
1187 ret = feupdateenv(penv);
1188 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1190 AC_MSG_RESULT($ac_c99_fenv_tr1)
1191 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1192 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1193 [Define if C99 functions in <fenv.h> should be imported in
1194 <tr1/cfenv> in namespace std::tr1.])
1197 # Check for the existence of <stdint.h> types.
1198 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1199 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1200 AC_TRY_COMPILE([#include <stdint.h>],
1201 [typedef int8_t my_int8_t;
1202 typedef int16_t my_int16_t;
1203 typedef int32_t my_int32_t;
1204 typedef int64_t my_int64_t;
1205 typedef int_fast8_t my_int_fast8_t;
1206 typedef int_fast16_t my_int_fast16_t;
1207 typedef int_fast32_t my_int_fast32_t;
1208 typedef int_fast64_t my_int_fast64_t;
1209 typedef int_least8_t my_int_least8_t;
1210 typedef int_least16_t my_int_least16_t;
1211 typedef int_least32_t my_int_least32_t;
1212 typedef int_least64_t my_int_least64_t;
1213 typedef intmax_t my_intmax_t;
1214 typedef intptr_t my_intptr_t;
1215 typedef uint8_t my_uint8_t;
1216 typedef uint16_t my_uint16_t;
1217 typedef uint32_t my_uint32_t;
1218 typedef uint64_t my_uint64_t;
1219 typedef uint_fast8_t my_uint_fast8_t;
1220 typedef uint_fast16_t my_uint_fast16_t;
1221 typedef uint_fast32_t my_uint_fast32_t;
1222 typedef uint_fast64_t my_uint_fast64_t;
1223 typedef uint_least8_t my_uint_least8_t;
1224 typedef uint_least16_t my_uint_least16_t;
1225 typedef uint_least32_t my_uint_least32_t;
1226 typedef uint_least64_t my_uint_least64_t;
1227 typedef uintmax_t my_uintmax_t;
1228 typedef uintptr_t my_uintptr_t;
1229 ],[glibcxx_cv_c99_stdint_tr1=yes], [glibcxx_cv_c99_stdint_tr1=no])
1231 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1232 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1233 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1234 [Define if C99 types in <stdint.h> should be imported in
1235 <tr1/cstdint> in namespace std::tr1.])
1238 # Check for the existence of <math.h> functions.
1239 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1240 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1241 AC_TRY_COMPILE([#include <math.h>],
1242 [typedef double_t my_double_t;
1243 typedef float_t my_float_t;
1257 copysignf(0.0f, 0.0f);
1258 copysignl(0.0l, 0.0l);
1275 fmaf(0.0f, 0.0f, 0.0f);
1276 fmal(0.0l, 0.0l, 0.0l);
1319 nextafter(0.0, 0.0);
1320 nextafterf(0.0f, 0.0f);
1321 nextafterl(0.0l, 0.0l);
1322 nexttoward(0.0, 0.0);
1323 nexttowardf(0.0f, 0.0f);
1324 nexttowardl(0.0l, 0.0l);
1325 remainder(0.0, 0.0);
1326 remainderf(0.0f, 0.0f);
1327 remainderl(0.0l, 0.0l);
1328 remquo(0.0, 0.0, 0);
1329 remquo(0.0f, 0.0f, 0);
1330 remquo(0.0l, 0.0l, 0);
1349 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1351 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1352 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1353 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1354 [Define if C99 functions or macros in <math.h> should be imported
1355 in <tr1/cmath> in namespace std::tr1.])
1358 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1359 # sense if the previous check fails, per C99, 7.8/1).
1360 ac_c99_inttypes_tr1=no;
1361 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1362 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1363 AC_TRY_COMPILE([#include <inttypes.h>],
1364 [intmax_t i, numer, denom, base;
1367 intmax_t ret = imaxabs(i);
1368 imaxdiv_t dret = imaxdiv(numer, denom);
1369 ret = strtoimax(s, endptr, base);
1370 uintmax_t uret = strtoumax(s, endptr, base);
1371 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1373 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1374 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1375 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1376 [Define if C99 functions in <inttypes.h> should be imported in
1377 <tr1/cinttypes> in namespace std::tr1.])
1380 # Check for the existence of the <stdbool.h> header.
1381 AC_CHECK_HEADERS(stdbool.h)
1383 CXXFLAGS="$ac_save_CXXFLAGS"
1388 dnl Check whether "dev/random" and "dev/urandom" are available for the
1389 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1391 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1393 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1394 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1395 AC_TRY_RUN([#include <stdio.h>
1398 return !(fopen("/dev/random", "r")
1399 && fopen("/dev/urandom", "r"));
1402 [glibcxx_cv_random_tr1=yes], [glibcxx_cv_random_tr1=no],
1403 [glibcxx_cv_random_tr1=no])
1405 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1406 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1407 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1408 [Define if dev/random and dev/urandom are available for
1409 the random_device of TR1 (Chapter 5.1).])
1415 dnl Check whether macros, etc are present for <system_error>
1417 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1419 m4_pushdef([n_syserr], [1])dnl
1420 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1421 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1422 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1423 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1424 AC_MSG_CHECKING([for syserr])
1425 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1426 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1427 [int i = syserr;])],
1428 [glibcxx_cv_system_error[]n_syserr=yes],
1429 [glibcxx_cv_system_error[]n_syserr=no])
1431 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1432 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1433 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1435 m4_define([n_syserr], m4_incr(n_syserr))dnl
1436 m4_popdef([SYSERR])dnl
1438 m4_popdef([n_syserr])dnl
1442 dnl Check whether C++200x's standard layout types are supported.
1444 AC_DEFUN([GLIBCXX_CHECK_STANDARD_LAYOUT], [
1446 AC_MSG_CHECKING([for ISO C++200x standard layout type support])
1447 AC_CACHE_VAL(ac_standard_layout, [
1450 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1451 ac_save_CXXFLAGS="$CXXFLAGS"
1452 CXXFLAGS='-std=gnu++0x'
1454 AC_TRY_COMPILE([struct b
1458 // Need standard layout relaxation from POD
1460 b& operator=(const b&);
1469 [ac_standard_layout=yes], [ac_standard_layout=no])
1471 CXXFLAGS="$ac_save_CXXFLAGS"
1474 AC_MSG_RESULT($ac_standard_layout)
1475 if test x"$ac_standard_layout" = x"yes"; then
1476 AC_DEFINE(_GLIBCXX_USE_STANDARD_LAYOUT, 1,
1477 [Define if standard layout types are supported in C++200x.])
1482 dnl Check for what type of C headers to use.
1484 dnl --enable-cheaders= [does stuff].
1485 dnl --disable-cheaders [does not do anything, really].
1486 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1487 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1489 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1490 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1491 [construct "C" headers for g++], [permit c|c_std|c_global])
1492 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1494 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1496 # Allow overrides to configure.host here.
1497 if test $enable_cheaders = c_global; then
1501 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1505 AC_SUBST(C_INCLUDE_DIR)
1506 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1507 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1508 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1509 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1510 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1515 dnl Check for which locale library to use. The choice is mapped to
1516 dnl a subdirectory of config/locale.
1518 dnl Default is generic.
1520 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1521 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1522 [use MODEL for target locale package],
1523 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1525 # Deal with gettext issues. Default to not using it (=no) until we detect
1526 # support for it later. Let the user turn it off via --e/d, but let that
1527 # default to on for easier handling.
1530 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1534 # Either a known packaage, or "auto"
1535 if test $enable_clocale = no || test $enable_clocale = yes; then
1538 enable_clocale_flag=$enable_clocale
1540 # Probe for locale model to use if none specified.
1541 # Default to "generic".
1542 if test $enable_clocale_flag = auto; then
1543 case ${target_os} in
1544 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1545 enable_clocale_flag=gnu
1548 enable_clocale_flag=darwin
1551 enable_clocale_flag=generic
1556 # Sanity check model, and test for special functionality.
1557 if test $enable_clocale_flag = gnu; then
1558 AC_EGREP_CPP([_GLIBCXX_ok], [
1559 #include <features.h>
1560 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1563 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1565 if test $enable_clocale = auto; then
1566 # Test for bugs early in glibc-2.2.x series
1568 #define _GNU_SOURCE 1
1571 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1572 extern __typeof(newlocale) __newlocale;
1573 extern __typeof(duplocale) __duplocale;
1574 extern __typeof(strcoll_l) __strcoll_l;
1578 const char __one[] = "Äuglein Augmen";
1579 const char __two[] = "Äuglein";
1584 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1585 loc_dup = __duplocale(loc);
1586 i = __strcoll_l(__one, __two, loc);
1587 j = __strcoll_l(__one, __two, loc_dup);
1591 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1592 [enable_clocale_flag=generic])
1595 # Set it to scream when it hurts.
1596 ac_save_CFLAGS="$CFLAGS"
1597 CFLAGS="-Wimplicit-function-declaration -Werror"
1599 # Use strxfrm_l if available.
1600 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1602 #include <locale.h>],
1603 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1604 AC_DEFINE(HAVE_STRXFRM_L, 1,
1605 [Define if strxfrm_l is available in <string.h>.]),)
1607 # Use strerror_l if available.
1608 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1610 #include <locale.h>],
1611 [__locale_t loc; strerror_l(5, loc);],
1612 AC_DEFINE(HAVE_STRERROR_L, 1,
1613 [Define if strerror_l is available in <string.h>.]),)
1615 CFLAGS="$ac_save_CFLAGS"
1618 # Perhaps use strerror_r if available, and strerror_l isn't.
1619 ac_save_CFLAGS="$CFLAGS"
1620 CFLAGS="-Wimplicit-function-declaration -Werror"
1621 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1623 #include <locale.h>],
1624 [char s[128]; strerror_r(5, s, 128);],
1625 AC_DEFINE(HAVE_STRERROR_R, 1,
1626 [Define if strerror_r is available in <string.h>.]),)
1627 CFLAGS="$ac_save_CFLAGS"
1629 # Set configure bits for specified locale package
1630 AC_MSG_CHECKING([for C locale to use])
1631 case ${enable_clocale_flag} in
1633 AC_MSG_RESULT(generic)
1635 CLOCALE_H=config/locale/generic/c_locale.h
1636 CLOCALE_CC=config/locale/generic/c_locale.cc
1637 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1638 CCOLLATE_CC=config/locale/generic/collate_members.cc
1639 CCTYPE_CC=config/locale/generic/ctype_members.cc
1640 CMESSAGES_H=config/locale/generic/messages_members.h
1641 CMESSAGES_CC=config/locale/generic/messages_members.cc
1642 CMONEY_CC=config/locale/generic/monetary_members.cc
1643 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1644 CTIME_H=config/locale/generic/time_members.h
1645 CTIME_CC=config/locale/generic/time_members.cc
1646 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1649 AC_MSG_RESULT(darwin or freebsd)
1651 CLOCALE_H=config/locale/generic/c_locale.h
1652 CLOCALE_CC=config/locale/generic/c_locale.cc
1653 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1654 CCOLLATE_CC=config/locale/generic/collate_members.cc
1655 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1656 CMESSAGES_H=config/locale/generic/messages_members.h
1657 CMESSAGES_CC=config/locale/generic/messages_members.cc
1658 CMONEY_CC=config/locale/generic/monetary_members.cc
1659 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1660 CTIME_H=config/locale/generic/time_members.h
1661 CTIME_CC=config/locale/generic/time_members.cc
1662 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1668 # Declare intention to use gettext, and add support for specific
1670 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1673 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1674 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1675 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1678 # Export the build objects.
1679 for ling in $ALL_LINGUAS; do \
1680 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1681 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1683 AC_SUBST(glibcxx_MOFILES)
1684 AC_SUBST(glibcxx_POFILES)
1686 CLOCALE_H=config/locale/gnu/c_locale.h
1687 CLOCALE_CC=config/locale/gnu/c_locale.cc
1688 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1689 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1690 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1691 CMESSAGES_H=config/locale/gnu/messages_members.h
1692 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1693 CMONEY_CC=config/locale/gnu/monetary_members.cc
1694 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1695 CTIME_H=config/locale/gnu/time_members.h
1696 CTIME_CC=config/locale/gnu/time_members.cc
1697 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1700 AC_MSG_RESULT(IEEE 1003.1)
1702 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1703 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1704 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1705 CCOLLATE_CC=config/locale/generic/collate_members.cc
1706 CCTYPE_CC=config/locale/generic/ctype_members.cc
1707 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1708 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1709 CMONEY_CC=config/locale/generic/monetary_members.cc
1710 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1711 CTIME_H=config/locale/generic/time_members.h
1712 CTIME_CC=config/locale/generic/time_members.cc
1713 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1717 # This is where the testsuite looks for locale catalogs, using the
1718 # -DLOCALEDIR define during testsuite compilation.
1719 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1720 AC_SUBST(glibcxx_localedir)
1722 # A standalone libintl (e.g., GNU libintl) may be in use.
1723 if test $USE_NLS = yes; then
1724 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1725 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1727 if test $USE_NLS = yes; then
1728 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1729 [Define if NLS translations are to be used.])
1734 AC_SUBST(CMESSAGES_H)
1735 AC_SUBST(CCODECVT_CC)
1736 AC_SUBST(CCOLLATE_CC)
1738 AC_SUBST(CMESSAGES_CC)
1740 AC_SUBST(CNUMERIC_CC)
1743 AC_SUBST(CLOCALE_CC)
1744 AC_SUBST(CLOCALE_INTERNAL_H)
1749 dnl Check for which std::allocator base class to use. The choice is
1750 dnl mapped from a subdirectory of include/ext.
1754 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1755 AC_MSG_CHECKING([for std::allocator base class])
1756 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1757 [use KIND for target std::allocator base],
1758 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1760 # If they didn't use this option switch, or if they specified --enable
1761 # with no specific model, we'll have to look for one. If they
1762 # specified --disable (???), do likewise.
1763 if test $enable_libstdcxx_allocator = no ||
1764 test $enable_libstdcxx_allocator = yes;
1766 enable_libstdcxx_allocator=auto
1769 # Either a known package, or "auto". Auto implies the default choice
1770 # for a particular platform.
1771 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1773 # Probe for host-specific support if no specific model is specified.
1775 if test $enable_libstdcxx_allocator_flag = auto; then
1776 case ${target_os} in
1777 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1778 enable_libstdcxx_allocator_flag=new
1781 enable_libstdcxx_allocator_flag=new
1785 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1788 # Set configure bits for specified locale package
1789 case ${enable_libstdcxx_allocator_flag} in
1791 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1792 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1795 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1796 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1799 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1800 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1803 ALLOCATOR_H=config/allocator/new_allocator_base.h
1804 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1807 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1808 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1812 AC_SUBST(ALLOCATOR_H)
1813 AC_SUBST(ALLOCATOR_NAME)
1818 dnl Check for whether the Boost-derived checks should be turned on.
1820 dnl --enable-concept-checks turns them on.
1821 dnl --disable-concept-checks leaves them off.
1822 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1823 dnl Where DEFAULT is either `yes' or `no'.
1825 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1826 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1827 if test $enable_concept_checks = yes; then
1828 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1829 [Define to use concept checking code from the boost libraries.])
1834 dnl Check for parallel mode pre-requisites, including OpenMP support.
1836 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1838 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1842 # See if configured libgomp/omp.h exists. (libgomp may be in
1843 # noconfigdirs but not explicitly disabled.)
1844 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1845 enable_parallel=yes;
1847 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1850 AC_MSG_CHECKING([for parallel mode support])
1851 AC_MSG_RESULT([$enable_parallel])
1852 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1857 dnl Check for which I/O library to use: stdio, or something specific.
1859 dnl Default is stdio.
1861 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1862 AC_MSG_CHECKING([for underlying I/O to use])
1863 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1864 [use target-specific I/O package], [permit stdio])
1866 # Now that libio has been removed, you can have any color you want as long
1867 # as it's black. This is one big no-op until other packages are added, but
1868 # showing the framework never hurts.
1869 case ${enable_cstdio} in
1871 CSTDIO_H=config/io/c_io_stdio.h
1872 BASIC_FILE_H=config/io/basic_file_stdio.h
1873 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1874 AC_MSG_RESULT(stdio)
1879 AC_SUBST(BASIC_FILE_H)
1880 AC_SUBST(BASIC_FILE_CC)
1885 dnl Check for "unusual" flags to pass to the compiler while building.
1887 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1888 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1889 dnl --disable-cxx-flags passes nothing.
1890 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1891 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1892 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1893 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1894 dnl If "default flags" is an empty string, the effect is the same
1895 dnl as --disable or --enable=no.
1897 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1898 AC_MSG_CHECKING([for extra compiler flags for building])
1899 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1900 [pass compiler FLAGS when building library],
1901 [case "x$enable_cxx_flags" in
1902 xno | x) enable_cxx_flags= ;;
1904 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1907 # Run through flags (either default or command-line) and set anything
1908 # extra (e.g., #defines) that must accompany particular g++ options.
1909 if test -n "$enable_cxx_flags"; then
1910 for f in $enable_cxx_flags; do
1914 *) # and we're trying to pass /what/ exactly?
1915 AC_MSG_ERROR([compiler flags start with a -]) ;;
1920 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1921 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1922 AC_SUBST(EXTRA_CXX_FLAGS)
1927 dnl Check to see if debugging libraries are to be built.
1929 dnl --enable-libstdcxx-debug
1930 dnl builds a separate set of debugging libraries in addition to the
1931 dnl normal (shared, static) libstdc++ binaries.
1933 dnl --disable-libstdcxx-debug
1934 dnl builds only one (non-debug) version of libstdc++.
1936 dnl --enable-libstdcxx-debug-flags=FLAGS
1937 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1939 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1940 dnl Where DEFAULT is either `yes' or `no'.
1942 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1943 AC_MSG_CHECKING([for additional debug build])
1944 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1945 AC_MSG_RESULT($enable_libstdcxx_debug)
1946 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1951 dnl Check for explicit debug flags.
1953 dnl --enable-libstdcxx-debug-flags='-O1'
1954 dnl is a general method for passing flags to be used when
1955 dnl building debug libraries with --enable-debug.
1957 dnl --disable-libstdcxx-debug-flags does nothing.
1958 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1959 dnl If "default flags" is an empty string, the effect is the same
1960 dnl as --disable or --enable=no.
1962 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1963 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1964 [pass compiler FLAGS when building debug library],
1965 [case "x$enable_libstdcxx_debug_flags" in
1966 xno | x) enable_libstdcxx_debug_flags= ;;
1968 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1971 # Option parsed, now set things appropriately
1972 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1973 AC_SUBST(DEBUG_FLAGS)
1975 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1980 dnl Check if the user only wants a freestanding library implementation.
1982 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1983 dnl installing only the headers required by [17.4.1.3] and the language
1984 dnl support library. More than that will be built (to keep the Makefiles
1985 dnl conveniently clean), but not installed.
1988 dnl is_hosted (yes/no)
1991 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1993 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1994 AC_ARG_ENABLE([hosted-libstdcxx],
1995 AC_HELP_STRING([--disable-hosted-libstdcxx],
1996 [only build freestanding C++ runtime support]),,
1999 enable_hosted_libstdcxx=no
2002 enable_hosted_libstdcxx=yes
2005 if test "$enable_hosted_libstdcxx" = no; then
2006 AC_MSG_NOTICE([Only freestanding libraries will be built])
2010 enable_libstdcxx_pch=no
2015 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2016 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2017 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2022 dnl Check for template specializations for the 'long long' type.
2023 dnl The result determines only whether 'long long' I/O is enabled; things
2024 dnl like numeric_limits<> specializations are always available.
2026 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2027 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2028 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2029 dnl Where DEFAULT is either `yes' or `no'.
2031 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2032 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2033 if test $enable_long_long = yes; then
2034 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2035 [Define if code specialized for long long should be used.])
2037 AC_MSG_CHECKING([for enabled long long specializations])
2038 AC_MSG_RESULT([$enable_long_long])
2043 dnl Check for template specializations for the 'wchar_t' type.
2045 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2046 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2047 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2048 dnl Where DEFAULT is either `yes' or `no'.
2050 dnl Necessary support must also be present.
2052 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2053 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2055 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2056 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2057 AC_MSG_CHECKING([for mbstate_t])
2058 AC_TRY_COMPILE([#include <wchar.h>],
2059 [mbstate_t teststate;],
2060 have_mbstate_t=yes, have_mbstate_t=no)
2061 AC_MSG_RESULT($have_mbstate_t)
2062 if test x"$have_mbstate_t" = xyes; then
2063 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2066 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2068 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2070 if test x"$enable_wchar_t" = x"yes"; then
2075 if test x"$ac_has_wchar_h" = xyes &&
2076 test x"$ac_has_wctype_h" = xyes; then
2077 AC_TRY_COMPILE([#include <wchar.h>
2138 ],[],[], [enable_wchar_t=no])
2146 if test x"$enable_wchar_t" = x"yes"; then
2147 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2148 [Define if code specialized for wchar_t should be used.])
2151 AC_MSG_CHECKING([for enabled wchar_t specializations])
2152 AC_MSG_RESULT([$enable_wchar_t])
2157 dnl Check to see if building and using a C++ precompiled header can be done.
2159 dnl --enable-libstdcxx-pch=yes
2160 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2161 dnl may work, after some light-hearted attempts to puzzle out compiler
2162 dnl support, flip bits on in include/Makefile.am
2164 dnl --disable-libstdcxx-pch
2165 dnl turns off attempts to use or build stdc++.h.gch.
2168 dnl glibcxx_PCHFLAGS
2170 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2171 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2172 if test $enable_libstdcxx_pch = yes; then
2173 AC_CACHE_CHECK([for compiler with PCH support],
2174 [glibcxx_cv_prog_CXX_pch],
2175 [ac_save_CXXFLAGS="$CXXFLAGS"
2176 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2179 echo '#include <math.h>' > conftest.h
2180 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2181 -o conftest.h.gch 1>&5 2>&1 &&
2182 echo '#error "pch failed"' > conftest.h &&
2183 echo '#include "conftest.h"' > conftest.cc &&
2184 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2186 glibcxx_cv_prog_CXX_pch=yes
2188 glibcxx_cv_prog_CXX_pch=no
2191 CXXFLAGS=$ac_save_CXXFLAGS
2194 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2197 AC_MSG_CHECKING([for enabled PCH])
2198 AC_MSG_RESULT([$enable_libstdcxx_pch])
2200 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2201 if test $enable_libstdcxx_pch = yes; then
2202 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2206 AC_SUBST(glibcxx_PCHFLAGS)
2211 dnl Check for atomic builtins.
2213 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2215 dnl This checks to see if the host supports the compiler-generated
2216 dnl builtins for atomic operations for various integral sizes. Note, this
2217 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2218 dnl that are used should be checked.
2221 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2222 dnl see: CHECK_SYNC_FETCH_AND_ADD
2225 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2226 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2228 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2231 old_CXXFLAGS="$CXXFLAGS"
2233 # Compile unoptimized.
2236 # Fake what AC_TRY_COMPILE does, without linking as this is
2237 # unnecessary for a builtins test.
2239 cat > conftest.$ac_ext << EOF
2240 [#]line __oline__ "configure"
2243 // NB: _Atomic_word not necessarily int.
2244 typedef int atomic_type;
2247 const atomic_type c3(0);
2248 __sync_fetch_and_add(&c1, c2);
2249 __sync_val_compare_and_swap(&c1, c3, c2);
2250 __sync_lock_test_and_set(&c1, c3);
2251 __sync_lock_release(&c1);
2252 __sync_synchronize();
2257 AC_MSG_CHECKING([for atomic builtins for int])
2258 if AC_TRY_EVAL(ac_compile); then
2259 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2260 enable_atomic_builtinsi=no
2262 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2263 [Define if builtin atomic operations for int are supported on this host.])
2264 enable_atomic_builtinsi=yes
2267 AC_MSG_RESULT($enable_atomic_builtinsi)
2270 cat > conftest.$ac_ext << EOF
2271 [#]line __oline__ "configure"
2274 typedef bool atomic_type;
2277 const atomic_type c3(0);
2278 __sync_fetch_and_add(&c1, c2);
2279 __sync_val_compare_and_swap(&c1, c3, c2);
2280 __sync_lock_test_and_set(&c1, c3);
2281 __sync_lock_release(&c1);
2282 __sync_synchronize();
2287 AC_MSG_CHECKING([for atomic builtins for bool])
2288 if AC_TRY_EVAL(ac_compile); then
2289 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2290 enable_atomic_builtinsb=no
2292 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2293 [Define if builtin atomic operations for bool are supported on this host.])
2294 enable_atomic_builtinsb=yes
2297 AC_MSG_RESULT($enable_atomic_builtinsb)
2300 CXXFLAGS="$old_CXXFLAGS"
2303 # Set atomicity_dir to builtins if either of above tests pass.
2304 if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
2305 atomicity_dir=cpu/generic/atomicity_builtins
2308 # If still generic, set to mutex.
2309 if test $atomicity_dir = "cpu/generic" ; then
2310 atomicity_dir=cpu/generic/atomicity_mutex
2311 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2312 if test $target_thread_file = single; then
2313 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2314 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2316 AC_MSG_WARN([They will be faked using a mutex.])
2317 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2325 dnl Check for exception handling support. If an explicit enable/disable
2326 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2327 dnl target may or may not support call frame exceptions.
2329 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2330 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2331 dnl Neither one forces an attempt at detection.
2334 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2336 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2337 AC_MSG_CHECKING([for exception model to use])
2340 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2341 [force use of builtin_setjmp for exceptions],
2342 [permit yes|no|auto])
2344 if test $enable_sjlj_exceptions = auto; then
2345 # Botheration. Now we've got to detect the exception model. Link tests
2346 # against libgcc.a are problematic since we've not been given proper -L
2347 # bits for single-tree newlib and libgloss.
2349 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2350 cat > conftest.$ac_ext << EOF
2351 [#]line __oline__ "configure"
2360 old_CXXFLAGS="$CXXFLAGS"
2362 if AC_TRY_EVAL(ac_compile); then
2363 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2364 enable_sjlj_exceptions=yes
2365 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2366 enable_sjlj_exceptions=no
2367 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2368 enable_sjlj_exceptions=no
2371 CXXFLAGS="$old_CXXFLAGS"
2375 # This is a tad weird, for hysterical raisins. We have to map
2376 # enable/disable to two different models.
2377 case $enable_sjlj_exceptions in
2379 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2380 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2381 ac_exception_model_name=sjlj
2384 ac_exception_model_name="call frame"
2387 AC_MSG_ERROR([unable to detect exception model])
2391 AC_MSG_RESULT($ac_exception_model_name)
2396 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2398 dnl --enable-visibility enables attempt to use visibility attributes.
2399 dnl --disable-visibility turns off all use of visibility attributes.
2400 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2401 dnl Where DEFAULT is 'yes'.
2403 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2404 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2406 if test x$enable_visibility = xyes ; then
2407 dnl all hail libgfortran
2408 dnl Check whether the target supports hidden visibility.
2409 AC_CACHE_CHECK([whether the target supports hidden visibility],
2410 glibcxx_cv_have_attribute_visibility, [
2411 save_CFLAGS="$CFLAGS"
2412 CFLAGS="$CFLAGS -Werror"
2413 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2414 [], glibcxx_cv_have_attribute_visibility=yes,
2415 glibcxx_cv_have_attribute_visibility=no)
2416 CFLAGS="$save_CFLAGS"])
2417 if test $glibcxx_cv_have_attribute_visibility = no; then
2418 enable_visibility=no
2422 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2423 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2428 dnl Add version tags to symbols in shared library (or not), additionally
2429 dnl marking other symbols as private/local (or not).
2431 dnl --enable-symvers=style adds a version script to the linker call when
2432 dnl creating the shared library. The choice of version script is
2433 dnl controlled by 'style'.
2434 dnl --disable-symvers does not.
2435 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2436 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2437 dnl choose a default style based on linker characteristics. Passing
2438 dnl 'no' disables versioning.
2440 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2442 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2443 [enables symbol versioning of the shared library],
2444 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2446 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2447 # don't know enough about $LD to do tricks...
2448 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2450 # Turn a 'yes' into a suitable default.
2451 if test x$enable_symvers = xyes ; then
2452 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2455 if test $with_gnu_ld = yes ; then
2458 case ${target_os} in
2460 enable_symvers=darwin ;;
2462 enable_symvers=no ;;
2468 # Check to see if 'darwin' or 'darwin-export' can win.
2469 if test x$enable_symvers = xdarwin-export ; then
2470 enable_symvers=darwin
2473 # Check to see if 'gnu' can win.
2474 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2475 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2476 AC_MSG_CHECKING([for shared libgcc])
2477 ac_save_CFLAGS="$CFLAGS"
2479 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2480 CFLAGS="$ac_save_CFLAGS"
2481 if test $glibcxx_shared_libgcc = no; then
2482 cat > conftest.c <<EOF
2483 int main (void) { return 0; }
2486 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2487 -shared -shared-libgcc -o conftest.so \
2488 conftest.c -v 2>&1 >/dev/null \
2489 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2491 rm -f conftest.c conftest.so
2492 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2493 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2494 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2495 CFLAGS="$ac_save_CFLAGS"
2498 AC_MSG_RESULT($glibcxx_shared_libgcc)
2500 # For GNU ld, we need at least this version. The format is described in
2501 # GLIBCXX_CHECK_LINKER_FEATURES above.
2502 glibcxx_min_gnu_ld_version=21400
2504 # If no shared libgcc, can't win.
2505 if test $glibcxx_shared_libgcc != yes; then
2506 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2507 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2508 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2510 elif test $with_gnu_ld != yes ; then
2512 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2513 AC_MSG_WARN([=== you are not using the GNU linker.])
2514 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2516 elif test $glibcxx_ld_is_gold = yes ; then
2517 : All versions of gold support symbol versioning.
2518 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2519 # The right tools, the right setup, but too old. Fallbacks?
2520 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2521 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2522 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2523 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2524 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2529 # Everything parsed; figure out what file to use.
2530 case $enable_symvers in
2532 SYMVER_FILE=config/abi/pre/none.ver
2535 SYMVER_FILE=config/abi/pre/gnu.ver
2536 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2537 [Define to use GNU versioning in the shared library.])
2539 gnu-versioned-namespace)
2540 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2541 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2542 [Define to use GNU namespace versioning in the shared library.])
2545 SYMVER_FILE=config/abi/pre/gnu.ver
2546 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2547 [Define to use darwin versioning in the shared library.])
2551 if test x$enable_symvers != xno ; then
2552 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2553 [Define to use symbol versioning in the shared library.])
2556 AC_SUBST(SYMVER_FILE)
2557 AC_SUBST(port_specific_symbol_files)
2558 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2559 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2560 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2561 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2562 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2564 # Now, set up compatibility support, if any.
2565 # In addition, need this to deal with std::size_t mangling in
2566 # src/compatibility.cc. In a perfect world, could use
2567 # typeid(std::size_t).name()[0] to do direct substitution.
2568 AC_MSG_CHECKING([for size_t as unsigned int])
2569 ac_save_CFLAGS="$CFLAGS"
2571 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2572 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2573 CFLAGS=$ac_save_CFLAGS
2574 if test "$glibcxx_size_t_is_i" = yes; then
2575 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2577 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2579 AC_MSG_CHECKING([for ptrdiff_t as int])
2580 ac_save_CFLAGS="$CFLAGS"
2582 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2583 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2584 CFLAGS=$ac_save_CFLAGS
2585 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2586 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2588 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2593 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2594 dnl We must stage the required headers so that they will be installed
2595 dnl with the library (unlike libgcc, the STL implementation is provided
2596 dnl solely within headers). Since we must not inject random user-space
2597 dnl macro names into user-provided C++ code, we first stage into <file>-in
2598 dnl and process to <file> with an output command. The reason for a two-
2599 dnl stage process here is to correctly handle $srcdir!=$objdir without
2600 dnl having to write complex code (the sed commands to clean the macro
2601 dnl namespace are complex and fragile enough as it is). We must also
2602 dnl add a relative path so that -I- is supported properly.
2605 dnl glibcxx_thread_h
2608 dnl HAVE_GTHR_DEFAULT
2610 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2611 AC_MSG_CHECKING([for thread model used by GCC])
2612 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2613 AC_MSG_RESULT([$target_thread_file])
2615 if test $target_thread_file != single; then
2616 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2617 [Define if gthr-default.h exists
2618 (meaning that threading support is enabled).])
2621 glibcxx_thread_h=gthr-$target_thread_file.h
2623 dnl Check for __GTHREADS define.
2624 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2625 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2631 AC_SUBST(glibcxx_thread_h)
2635 # Check whether LC_MESSAGES is available in <locale.h>.
2636 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2638 # This file file be copied and used freely without restrictions. It can
2639 # be used in projects which are not available under the GNU Public License
2640 # but which still want to provide support for the GNU gettext functionality.
2641 # Please note that the actual code is *not* freely available.
2642 AC_DEFUN([AC_LC_MESSAGES], [
2643 AC_CHECK_HEADER(locale.h, [
2644 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2645 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2646 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2647 if test $ac_cv_val_LC_MESSAGES = yes; then
2648 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2649 [Define if LC_MESSAGES is available in <locale.h>.])
2654 # Macros from the top-level gcc directory.
2655 m4_include([../config/tls.m4])