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.
469 dnl Also check whether int64_t is actually a typedef to long or long long.
471 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
476 AC_MSG_CHECKING([for int64_t])
477 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
479 [#include <stdint.h>],
481 [glibcxx_cv_INT64_T=yes],
482 [glibcxx_cv_INT64_T=no])
485 if test $glibcxx_cv_INT64_T = yes; then
486 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
487 AC_MSG_RESULT($glibcxx_cv_INT64_T)
489 AC_MSG_CHECKING([for int64_t as long])
490 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
493 template<typename, typename> struct same { enum { value = -1 }; };
494 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
495 int array[same<int64_t, long>::value];], [],
496 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
499 if test $glibcxx_cv_int64_t_long = yes; then
500 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
501 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
504 AC_MSG_CHECKING([for int64_t as long long])
505 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
508 template<typename, typename> struct same { enum { value = -1 }; };
509 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
510 int array[same<int64_t, long long>::value];], [],
511 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
514 if test $glibcxx_cv_int64_t_long_long = yes; then
515 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
516 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
525 dnl Check whether LFS support is available.
527 AC_DEFUN([GLIBCXX_CHECK_LFS], [
530 ac_save_CXXFLAGS="$CXXFLAGS"
531 CXXFLAGS="$CXXFLAGS -fno-exceptions"
532 AC_MSG_CHECKING([for LFS support])
533 AC_CACHE_VAL(glibcxx_cv_LFS, [
537 #include <sys/stat.h>
541 fseeko64(fp, 0, SEEK_CUR);
543 lseek64(1, 0, SEEK_CUR);
546 [glibcxx_cv_LFS=yes],
549 if test $glibcxx_cv_LFS = yes; then
550 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
552 AC_MSG_RESULT($glibcxx_cv_LFS)
553 CXXFLAGS="$ac_save_CXXFLAGS"
559 dnl Check for whether a fully dynamic basic_string implementation should
560 dnl be turned on, that does not put empty objects in per-process static
561 dnl memory (mostly useful together with shared memory allocators, see PR
562 dnl libstdc++/16612 for details).
564 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
565 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
566 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
567 dnl Where DEFAULT is either `yes' or `no'.
569 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
570 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
571 if test $enable_fully_dynamic_string = yes; then
572 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
573 [Define if a fully dynamic basic_string is wanted.])
579 dnl Does any necessary configuration of the testsuite directory. Generates
580 dnl the testsuite_hooks.h header.
582 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
586 dnl GLIBCXX_TEST_WCHAR_T
587 dnl GLIBCXX_TEST_THREAD
591 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
592 if $GLIBCXX_IS_NATIVE ; then
593 # Do checks for resource limit functions.
594 GLIBCXX_CHECK_SETRLIMIT
596 # Look for setenv, so that extended locale tests can be performed.
597 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
600 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
601 test $enable_symvers != no; then
604 enable_abi_check=no ;;
606 enable_abi_check=yes ;;
609 # Only build this as native, since automake does not understand
614 # Export file names for ABI checking.
615 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
616 AC_SUBST(baseline_dir)
621 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
625 dnl TOPLEVEL_INCLUDES
627 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
628 # Used for every C++ compile we perform.
630 -I$glibcxx_builddir/include/$host_alias \
631 -I$glibcxx_builddir/include \
632 -I$glibcxx_srcdir/libsupc++"
634 # For Canadian crosses, pick this up too.
635 if test $CANADIAN = yes; then
636 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
639 # Stuff in the actual top level. Currently only used by libsupc++ to
640 # get unwind* headers from the gcc dir.
641 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
642 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
644 # Now, export this to all the little Makefiles....
645 AC_SUBST(GLIBCXX_INCLUDES)
646 AC_SUBST(TOPLEVEL_INCLUDES)
651 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
652 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
655 dnl OPTIMIZE_CXXFLAGS
658 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
659 # Optimization flags that are probably a good idea for thrill-seekers. Just
660 # uncomment the lines below and make, everything else is ready to go...
661 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
662 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
663 AC_SUBST(OPTIMIZE_CXXFLAGS)
665 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
671 dnl All installation directory information is determined here.
675 dnl glibcxx_prefixdir
676 dnl glibcxx_toolexecdir
677 dnl glibcxx_toolexeclibdir
679 dnl Assumes cross_compiling bits already done, and with_cross_host in
682 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
683 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
684 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
685 glibcxx_toolexecdir=no
686 glibcxx_toolexeclibdir=no
687 glibcxx_prefixdir=$prefix
689 AC_MSG_CHECKING([for gxx-include-dir])
690 AC_ARG_WITH([gxx-include-dir],
691 AC_HELP_STRING([--with-gxx-include-dir=DIR],
692 [installation directory for include files]),
694 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
695 no) gxx_include_dir=no ;;
696 *) gxx_include_dir=$withval ;;
698 [gxx_include_dir=no])
699 AC_MSG_RESULT($gxx_include_dir)
701 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
702 AC_ARG_ENABLE([version-specific-runtime-libs],
703 AC_HELP_STRING([--enable-version-specific-runtime-libs],
704 [Specify that runtime libraries should be installed in a compiler-specific directory]),
705 [case "$enableval" in
706 yes) version_specific_libs=yes ;;
707 no) version_specific_libs=no ;;
708 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
710 [version_specific_libs=no])
711 AC_MSG_RESULT($version_specific_libs)
713 # Default case for install directory for include files.
714 if test $version_specific_libs = no && test $gxx_include_dir = no; then
715 gxx_include_dir='include/c++/${gcc_version}'
716 if test -n "$with_cross_host" &&
717 test x"$with_cross_host" != x"no"; then
718 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
720 gxx_include_dir='${prefix}/'"$gxx_include_dir"
724 # Version-specific runtime libs processing.
725 if test $version_specific_libs = yes; then
726 # Need the gcc compiler version to know where to install libraries
727 # and header files if --enable-version-specific-runtime-libs option
728 # is selected. FIXME: these variables are misnamed, there are
729 # no executables installed in _toolexecdir or _toolexeclibdir.
730 if test x"$gxx_include_dir" = x"no"; then
731 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
733 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
734 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
737 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
738 # Install a library built with a cross compiler in tooldir, not libdir.
739 if test x"$glibcxx_toolexecdir" = x"no"; then
740 if test -n "$with_cross_host" &&
741 test x"$with_cross_host" != x"no"; then
742 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
743 glibcxx_toolexeclibdir='${toolexecdir}/lib'
745 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
746 glibcxx_toolexeclibdir='${libdir}'
748 multi_os_directory=`$CXX -print-multi-os-directory`
749 case $multi_os_directory in
750 .) ;; # Avoid trailing /.
751 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
755 AC_MSG_CHECKING([for install location])
756 AC_MSG_RESULT($gxx_include_dir)
758 AC_SUBST(glibcxx_prefixdir)
759 AC_SUBST(gxx_include_dir)
760 AC_SUBST(glibcxx_toolexecdir)
761 AC_SUBST(glibcxx_toolexeclibdir)
767 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
768 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
769 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
771 dnl See docs/html/17_intro/configury.html#enable for documentation.
773 m4_define([GLIBCXX_ENABLE],[dnl
774 m4_define([_g_switch],[--enable-$1])dnl
775 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
776 AC_ARG_ENABLE($1,_g_help,
781 m4_bpatsubst([$5],[permit ])) ;;
782 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
783 dnl Idea for future: generate a URL pointing to
784 dnl "onlinedocs/configopts.html#whatever"
791 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
795 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
796 m4_undefine([_g_switch])dnl
797 m4_undefine([_g_help])dnl
802 dnl Check for ISO/IEC 9899:1999 "C99" support.
804 dnl --enable-c99 defines _GLIBCXX_USE_C99
805 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
806 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
807 dnl Where DEFAULT is either `yes' or `no'.
808 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
810 AC_DEFUN([GLIBCXX_ENABLE_C99], [
811 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
813 if test x"$enable_c99" = x"yes"; then
818 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
819 # undefined and fake C99 facilities - like pre-standard snprintf - may be
820 # spuriously enabled.
821 # Long term, -std=c++0x could be even better, could manage to explicitely
822 # request C99 facilities to the underlying C headers.
823 ac_save_CXXFLAGS="$CXXFLAGS"
824 CXXFLAGS="$CXXFLAGS -std=c++98"
826 ac_save_gcc_no_link="$gcc_no_link"
828 if test x$gcc_no_link != xyes; then
829 # Use -fno-exceptions to that the C driver can link these tests without
830 # hitting undefined references to personality routines.
831 CXXFLAGS="$CXXFLAGS -fno-exceptions"
832 AC_CHECK_LIB(m, sin, [
835 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
840 # Check for the existence of <math.h> functions used if C99 is enabled.
841 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
842 AC_CACHE_VAL(glibcxx_cv_c99_math, [
843 GCC_TRY_COMPILE_OR_LINK(
845 volatile double d1, d2;
853 i = isgreater(d1, d2);
854 i = isgreaterequal(d1, d2);
856 i = islessequal(d1, d2);
857 i = islessgreater(d1, d2);
858 i = islessgreater(d1, d2);
859 i = isunordered(d1, d2);
860 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
862 AC_MSG_RESULT($glibcxx_cv_c99_math)
863 if test x"$glibcxx_cv_c99_math" = x"yes"; then
864 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
865 [Define if C99 functions or macros in <math.h> should be imported
866 in <cmath> in namespace std.])
869 # Check for the existence of <complex.h> complex math functions.
870 # This is necessary even though libstdc++ uses the builtin versions
871 # of these functions, because if the builtin cannot be used, a reference
872 # to the library function is emitted.
873 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
874 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
875 glibcxx_cv_c99_complex=no;
876 if test x"$ac_has_complex_h" = x"yes"; then
877 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
878 GCC_TRY_COMPILE_OR_LINK(
879 [#include <complex.h>
880 typedef __complex__ float float_type;
881 typedef __complex__ double double_type;
882 typedef __complex__ long double ld_type;
883 volatile float_type tmpf;
884 volatile double_type tmpd;
885 volatile ld_type tmpld;
888 volatile long double ld;],
900 tmpf = cpowf(tmpf, tmpf);
913 tmpd = cpow(tmpd, tmpd);
917 tmpld = ccosl(tmpld);
918 tmpld = ccoshl(tmpld);
919 tmpld = cexpl(tmpld);
920 tmpld = clogl(tmpld);
921 tmpld = csinl(tmpld);
922 tmpld = csinhl(tmpld);
923 tmpld = csqrtl(tmpld);
924 tmpld = ctanl(tmpld);
925 tmpld = ctanhl(tmpld);
926 tmpld = cpowl(tmpld, tmpld);
927 tmpld = cprojl(tmpld);
928 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
930 AC_MSG_RESULT($glibcxx_cv_c99_complex)
931 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
932 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
933 [Define if C99 functions in <complex.h> should be used in
934 <complex>. Using compiler builtins for these functions requires
935 corresponding C99 library functions to be present.])
938 # Check for the existence in <stdio.h> of vscanf, et. al.
939 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
940 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
941 GCC_TRY_COMPILE_OR_LINK(
944 void foo(char* fmt, ...)
946 va_list args; va_start(args, fmt);
947 vfscanf(stderr, "%i", args);
949 vsnprintf(fmt, 0, "%i", args);
950 vsscanf(fmt, "%i", args);
952 [snprintf("12", 0, "%i");],
953 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
955 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
957 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
958 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
959 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
960 GCC_TRY_COMPILE_OR_LINK(
963 volatile long double ld;
964 volatile unsigned long long ll;
967 f = strtof("gnu", &tmp);
968 ld = strtold("gnu", &tmp);
969 ll = strtoll("gnu", &tmp, 10);
970 ll = strtoull("gnu", &tmp, 10);
972 mydivt = lldiv(10,1);
977 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
979 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
981 # Check for the existence in <wchar.h> of wcstold, etc.
982 glibcxx_cv_c99_wchar=no;
983 if test x"$ac_has_wchar_h" = xyes &&
984 test x"$ac_has_wctype_h" = xyes; then
985 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
986 AC_TRY_COMPILE([#include <wchar.h>
993 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
995 # Checks for wide character functions that may not be present.
996 # Injection of these is wrapped with guard macros.
997 # NB: only put functions here, instead of immediately above, if
998 # absolutely necessary.
999 AC_TRY_COMPILE([#include <wchar.h>
1000 namespace test { using ::vfwscanf; } ], [],
1001 [AC_DEFINE(HAVE_VFWSCANF,1,
1002 [Defined if vfwscanf exists.])],[])
1004 AC_TRY_COMPILE([#include <wchar.h>
1005 namespace test { using ::vswscanf; } ], [],
1006 [AC_DEFINE(HAVE_VSWSCANF,1,
1007 [Defined if vswscanf exists.])],[])
1009 AC_TRY_COMPILE([#include <wchar.h>
1010 namespace test { using ::vwscanf; } ], [],
1011 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1013 AC_TRY_COMPILE([#include <wchar.h>
1014 namespace test { using ::wcstof; } ], [],
1015 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1017 AC_TRY_COMPILE([#include <wctype.h>],
1018 [ wint_t t; int i = iswblank(t);],
1019 [AC_DEFINE(HAVE_ISWBLANK,1,
1020 [Defined if iswblank exists.])],[])
1022 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1025 # Option parsed, now set things appropriately.
1026 if test x"$glibcxx_cv_c99_math" = x"no" ||
1027 test x"$glibcxx_cv_c99_complex" = x"no" ||
1028 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1029 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1030 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1033 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1034 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1035 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1038 gcc_no_link="$ac_save_gcc_no_link"
1039 LIBS="$ac_save_LIBS"
1040 CXXFLAGS="$ac_save_CXXFLAGS"
1044 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1045 AC_MSG_RESULT($enable_c99)
1050 dnl Check for IEEE Std 1003.1-2001 clock_gettime required for
1051 dnl 20.8.5 [time.clock] in the current C++0X working draft.
1053 AC_DEFUN([GLIBCXX_CHECK_CLOCK_GETTIME], [
1057 ac_save_CXXFLAGS="$CXXFLAGS"
1058 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1059 ac_save_LIBS="$LIBS"
1061 AC_SEARCH_LIBS(clock_gettime, [posix4])
1064 case "$ac_cv_search_clock_gettime" in
1065 -lposix4*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1068 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1070 ac_has_clock_monotonic=no;
1071 ac_has_clock_realtime=no;
1072 if test x"$ac_has_unistd_h" = x"yes"; then
1073 AC_MSG_CHECKING([for monotonic clock])
1075 [#include <unistd.h>
1078 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1081 clock_gettime(CLOCK_MONOTONIC, &tp);
1082 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1084 AC_MSG_RESULT($ac_has_clock_monotonic)
1086 AC_MSG_CHECKING([for realtime clock])
1088 [#include <unistd.h>
1091 [#if _POSIX_TIMERS > 0
1094 clock_gettime(CLOCK_REALTIME, &tp);
1095 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1097 AC_MSG_RESULT($ac_has_clock_realtime)
1100 if test x"$ac_has_clock_monotonic" = x"yes"; then
1101 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1102 [ Defined if clock_gettime has monotonic clock support. ])
1105 if test x"$ac_has_clock_realtime" = x"yes"; then
1106 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1107 [ Defined if clock_gettime has realtime clock support. ])
1110 AC_SUBST(GLIBCXX_LIBS)
1112 CXXFLAGS="$ac_save_CXXFLAGS"
1113 LIBS="$ac_save_LIBS"
1118 dnl Check for IEEE Std 1003.1-2001 gettimeofday required for
1119 dnl 20.8.5 [time.clock] in the current C++0X working draft.
1121 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1125 ac_save_CXXFLAGS="$CXXFLAGS"
1126 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1128 ac_has_gettimeofday=no;
1129 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1130 if test x"$ac_has_sys_time_h" = x"yes"; then
1131 AC_MSG_CHECKING([for gettimeofday])
1132 AC_TRY_LINK([#include <sys/time.h>],
1133 [timeval tv; gettimeofday(&tv, 0);],
1134 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1136 AC_MSG_RESULT($ac_has_gettimeofday)
1139 if test x"$ac_has_gettimeofday" = x"yes"; then
1140 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1141 [ Defined if gettimeofday is available. ])
1144 CXXFLAGS="$ac_save_CXXFLAGS"
1149 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1150 dnl facilities in Chapter 8, "C compatibility".
1152 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1157 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1158 # undefined and fake C99 facilities may be spuriously enabled.
1159 ac_save_CXXFLAGS="$CXXFLAGS"
1160 CXXFLAGS="$CXXFLAGS -std=c++98"
1162 # Check for the existence of <complex.h> complex math functions used
1164 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1165 ac_c99_complex_tr1=no;
1166 if test x"$ac_has_complex_h" = x"yes"; then
1167 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1168 AC_TRY_COMPILE([#include <complex.h>],
1169 [typedef __complex__ float float_type; float_type tmpf;
1176 typedef __complex__ double double_type; double_type tmpd;
1183 typedef __complex__ long double ld_type; ld_type tmpld;
1190 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1192 AC_MSG_RESULT($ac_c99_complex_tr1)
1193 if test x"$ac_c99_complex_tr1" = x"yes"; then
1194 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1195 [Define if C99 functions in <complex.h> should be used in
1196 <tr1/complex>. Using compiler builtins for these functions
1197 requires corresponding C99 library functions to be present.])
1200 # Check for the existence of <ctype.h> functions.
1201 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1202 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1203 AC_TRY_COMPILE([#include <ctype.h>],
1207 ],[glibcxx_cv_c99_ctype_tr1=yes],
1208 [glibcxx_cv_c99_ctype_tr1=no])
1210 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1211 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1212 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1213 [Define if C99 functions in <ctype.h> should be imported in
1214 <tr1/cctype> in namespace std::tr1.])
1217 # Check for the existence of <fenv.h> functions.
1218 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1220 if test x"$ac_has_fenv_h" = x"yes"; then
1221 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1222 AC_TRY_COMPILE([#include <fenv.h>],
1227 ret = feclearexcept(except);
1228 ret = fegetexceptflag(pflag, except);
1229 ret = feraiseexcept(except);
1230 ret = fesetexceptflag(pflag, except);
1231 ret = fetestexcept(except);
1233 ret = fesetround(mode);
1234 ret = fegetenv(penv);
1235 ret = feholdexcept(penv);
1236 ret = fesetenv(penv);
1237 ret = feupdateenv(penv);
1238 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1240 AC_MSG_RESULT($ac_c99_fenv_tr1)
1241 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1242 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1243 [Define if C99 functions in <fenv.h> should be imported in
1244 <tr1/cfenv> in namespace std::tr1.])
1247 # Check for the existence of <stdint.h> types.
1248 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1249 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1250 AC_TRY_COMPILE([#include <stdint.h>],
1251 [typedef int8_t my_int8_t;
1252 typedef int16_t my_int16_t;
1253 typedef int32_t my_int32_t;
1254 typedef int64_t my_int64_t;
1255 typedef int_fast8_t my_int_fast8_t;
1256 typedef int_fast16_t my_int_fast16_t;
1257 typedef int_fast32_t my_int_fast32_t;
1258 typedef int_fast64_t my_int_fast64_t;
1259 typedef int_least8_t my_int_least8_t;
1260 typedef int_least16_t my_int_least16_t;
1261 typedef int_least32_t my_int_least32_t;
1262 typedef int_least64_t my_int_least64_t;
1263 typedef intmax_t my_intmax_t;
1264 typedef intptr_t my_intptr_t;
1265 typedef uint8_t my_uint8_t;
1266 typedef uint16_t my_uint16_t;
1267 typedef uint32_t my_uint32_t;
1268 typedef uint64_t my_uint64_t;
1269 typedef uint_fast8_t my_uint_fast8_t;
1270 typedef uint_fast16_t my_uint_fast16_t;
1271 typedef uint_fast32_t my_uint_fast32_t;
1272 typedef uint_fast64_t my_uint_fast64_t;
1273 typedef uint_least8_t my_uint_least8_t;
1274 typedef uint_least16_t my_uint_least16_t;
1275 typedef uint_least32_t my_uint_least32_t;
1276 typedef uint_least64_t my_uint_least64_t;
1277 typedef uintmax_t my_uintmax_t;
1278 typedef uintptr_t my_uintptr_t;
1279 ],[glibcxx_cv_c99_stdint_tr1=yes],
1280 [glibcxx_cv_c99_stdint_tr1=no])
1282 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1283 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1284 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1285 [Define if C99 types in <stdint.h> should be imported in
1286 <tr1/cstdint> in namespace std::tr1.])
1289 # Check for the existence of <math.h> functions.
1290 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1291 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1292 AC_TRY_COMPILE([#include <math.h>],
1293 [typedef double_t my_double_t;
1294 typedef float_t my_float_t;
1308 copysignf(0.0f, 0.0f);
1309 copysignl(0.0l, 0.0l);
1326 fmaf(0.0f, 0.0f, 0.0f);
1327 fmal(0.0l, 0.0l, 0.0l);
1370 nextafter(0.0, 0.0);
1371 nextafterf(0.0f, 0.0f);
1372 nextafterl(0.0l, 0.0l);
1373 nexttoward(0.0, 0.0);
1374 nexttowardf(0.0f, 0.0f);
1375 nexttowardl(0.0l, 0.0l);
1376 remainder(0.0, 0.0);
1377 remainderf(0.0f, 0.0f);
1378 remainderl(0.0l, 0.0l);
1379 remquo(0.0, 0.0, 0);
1380 remquo(0.0f, 0.0f, 0);
1381 remquo(0.0l, 0.0l, 0);
1400 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1402 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1403 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1404 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1405 [Define if C99 functions or macros in <math.h> should be imported
1406 in <tr1/cmath> in namespace std::tr1.])
1409 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1410 # sense if the previous check fails, per C99, 7.8/1).
1411 ac_c99_inttypes_tr1=no;
1412 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1413 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1414 AC_TRY_COMPILE([#include <inttypes.h>],
1415 [intmax_t i, numer, denom, base;
1418 intmax_t ret = imaxabs(i);
1419 imaxdiv_t dret = imaxdiv(numer, denom);
1420 ret = strtoimax(s, endptr, base);
1421 uintmax_t uret = strtoumax(s, endptr, base);
1422 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1424 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1425 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1426 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1427 [Define if C99 functions in <inttypes.h> should be imported in
1428 <tr1/cinttypes> in namespace std::tr1.])
1431 # Check for the existence of the <stdbool.h> header.
1432 AC_CHECK_HEADERS(stdbool.h)
1434 CXXFLAGS="$ac_save_CXXFLAGS"
1439 dnl Check whether "dev/random" and "dev/urandom" are available for the
1440 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1442 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1444 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1445 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1446 AC_TRY_RUN([#include <stdio.h>
1449 return !(fopen("/dev/random", "r")
1450 && fopen("/dev/urandom", "r"));
1453 [glibcxx_cv_random_tr1=yes], [glibcxx_cv_random_tr1=no],
1454 [glibcxx_cv_random_tr1=no])
1456 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1457 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1458 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1459 [Define if dev/random and dev/urandom are available for
1460 the random_device of TR1 (Chapter 5.1).])
1466 dnl Check whether EOF, SEEK_CUR, and SEEK_END have the most common values:
1467 dnl in that case including <cstdio> in some C++ headers can be avoided.
1469 AC_DEFUN([GLIBCXX_CHECK_STDIO_MACROS], [
1471 AC_MSG_CHECKING([for EOF == -1, SEEK_CUR == 1, SEEK_END == 2])
1472 AC_CACHE_VAL(glibcxx_cv_stdio_macros, [
1473 AC_TRY_COMPILE([#include <stdio.h>],
1474 [#if ((EOF != -1) || (SEEK_CUR != 1) || (SEEK_END != 2))
1477 ], [glibcxx_cv_stdio_macros=yes],
1478 [glibcxx_cv_stdio_macros=no])
1480 AC_MSG_RESULT($glibcxx_cv_stdio_macros)
1481 if test x"$glibcxx_cv_stdio_macros" = x"yes"; then
1482 AC_DEFINE(_GLIBCXX_STDIO_MACROS, 1,
1483 [Define if EOF == -1, SEEK_CUR == 1, SEEK_END == 2.])
1489 dnl Check whether macros, etc are present for <system_error>
1491 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1493 m4_pushdef([n_syserr], [1])dnl
1494 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1495 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1496 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1497 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1498 AC_MSG_CHECKING([for syserr])
1499 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1500 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1501 [int i = syserr;])],
1502 [glibcxx_cv_system_error[]n_syserr=yes],
1503 [glibcxx_cv_system_error[]n_syserr=no])
1505 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1506 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1507 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1509 m4_define([n_syserr], m4_incr(n_syserr))dnl
1510 m4_popdef([SYSERR])dnl
1512 m4_popdef([n_syserr])dnl
1516 dnl Check whether C++200x's standard layout types are supported.
1518 AC_DEFUN([GLIBCXX_CHECK_STANDARD_LAYOUT], [
1520 AC_MSG_CHECKING([for ISO C++200x standard layout type support])
1521 AC_CACHE_VAL(ac_standard_layout, [
1524 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1525 ac_save_CXXFLAGS="$CXXFLAGS"
1526 CXXFLAGS='-std=gnu++0x'
1528 AC_TRY_COMPILE([struct b
1532 // Need standard layout relaxation from POD
1534 b& operator=(const b&);
1543 [ac_standard_layout=yes], [ac_standard_layout=no])
1545 CXXFLAGS="$ac_save_CXXFLAGS"
1548 AC_MSG_RESULT($ac_standard_layout)
1549 if test x"$ac_standard_layout" = x"yes"; then
1550 AC_DEFINE(_GLIBCXX_USE_STANDARD_LAYOUT, 1,
1551 [Define if standard layout types are supported in C++200x.])
1556 dnl Check for what type of C headers to use.
1558 dnl --enable-cheaders= [does stuff].
1559 dnl --disable-cheaders [does not do anything, really].
1560 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1561 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1563 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1564 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1565 [construct "C" headers for g++], [permit c|c_std|c_global])
1566 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1568 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1570 # Allow overrides to configure.host here.
1571 if test $enable_cheaders = c_global; then
1575 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1579 AC_SUBST(C_INCLUDE_DIR)
1580 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1581 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1582 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1583 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1584 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1589 dnl Check for which locale library to use. The choice is mapped to
1590 dnl a subdirectory of config/locale.
1592 dnl Default is generic.
1594 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1595 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1596 [use MODEL for target locale package],
1597 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1599 # Deal with gettext issues. Default to not using it (=no) until we detect
1600 # support for it later. Let the user turn it off via --e/d, but let that
1601 # default to on for easier handling.
1604 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1608 # Either a known packaage, or "auto"
1609 if test $enable_clocale = no || test $enable_clocale = yes; then
1612 enable_clocale_flag=$enable_clocale
1614 # Probe for locale model to use if none specified.
1615 # Default to "generic".
1616 if test $enable_clocale_flag = auto; then
1617 case ${target_os} in
1618 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1619 enable_clocale_flag=gnu
1622 enable_clocale_flag=darwin
1625 enable_clocale_flag=generic
1630 # Sanity check model, and test for special functionality.
1631 if test $enable_clocale_flag = gnu; then
1632 AC_EGREP_CPP([_GLIBCXX_ok], [
1633 #include <features.h>
1634 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1637 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1639 if test $enable_clocale = auto; then
1640 # Test for bugs early in glibc-2.2.x series
1642 #define _GNU_SOURCE 1
1645 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1646 extern __typeof(newlocale) __newlocale;
1647 extern __typeof(duplocale) __duplocale;
1648 extern __typeof(strcoll_l) __strcoll_l;
1652 const char __one[] = "Äuglein Augmen";
1653 const char __two[] = "Äuglein";
1658 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1659 loc_dup = __duplocale(loc);
1660 i = __strcoll_l(__one, __two, loc);
1661 j = __strcoll_l(__one, __two, loc_dup);
1665 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1666 [enable_clocale_flag=generic])
1669 # Set it to scream when it hurts.
1670 ac_save_CFLAGS="$CFLAGS"
1671 CFLAGS="-Wimplicit-function-declaration -Werror"
1673 # Use strxfrm_l if available.
1674 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1676 #include <locale.h>],
1677 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1678 AC_DEFINE(HAVE_STRXFRM_L, 1,
1679 [Define if strxfrm_l is available in <string.h>.]),)
1681 # Use strerror_l if available.
1682 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1684 #include <locale.h>],
1685 [__locale_t loc; strerror_l(5, loc);],
1686 AC_DEFINE(HAVE_STRERROR_L, 1,
1687 [Define if strerror_l is available in <string.h>.]),)
1689 CFLAGS="$ac_save_CFLAGS"
1692 # Perhaps use strerror_r if available, and strerror_l isn't.
1693 ac_save_CFLAGS="$CFLAGS"
1694 CFLAGS="-Wimplicit-function-declaration -Werror"
1695 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1697 #include <locale.h>],
1698 [char s[128]; strerror_r(5, s, 128);],
1699 AC_DEFINE(HAVE_STRERROR_R, 1,
1700 [Define if strerror_r is available in <string.h>.]),)
1701 CFLAGS="$ac_save_CFLAGS"
1703 # Set configure bits for specified locale package
1704 AC_MSG_CHECKING([for C locale to use])
1705 case ${enable_clocale_flag} in
1707 AC_MSG_RESULT(generic)
1709 CLOCALE_H=config/locale/generic/c_locale.h
1710 CLOCALE_CC=config/locale/generic/c_locale.cc
1711 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1712 CCOLLATE_CC=config/locale/generic/collate_members.cc
1713 CCTYPE_CC=config/locale/generic/ctype_members.cc
1714 CMESSAGES_H=config/locale/generic/messages_members.h
1715 CMESSAGES_CC=config/locale/generic/messages_members.cc
1716 CMONEY_CC=config/locale/generic/monetary_members.cc
1717 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1718 CTIME_H=config/locale/generic/time_members.h
1719 CTIME_CC=config/locale/generic/time_members.cc
1720 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1723 AC_MSG_RESULT(darwin or freebsd)
1725 CLOCALE_H=config/locale/generic/c_locale.h
1726 CLOCALE_CC=config/locale/generic/c_locale.cc
1727 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1728 CCOLLATE_CC=config/locale/generic/collate_members.cc
1729 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1730 CMESSAGES_H=config/locale/generic/messages_members.h
1731 CMESSAGES_CC=config/locale/generic/messages_members.cc
1732 CMONEY_CC=config/locale/generic/monetary_members.cc
1733 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1734 CTIME_H=config/locale/generic/time_members.h
1735 CTIME_CC=config/locale/generic/time_members.cc
1736 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1742 # Declare intention to use gettext, and add support for specific
1744 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1747 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1748 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1749 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1752 # Export the build objects.
1753 for ling in $ALL_LINGUAS; do \
1754 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1755 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1757 AC_SUBST(glibcxx_MOFILES)
1758 AC_SUBST(glibcxx_POFILES)
1760 CLOCALE_H=config/locale/gnu/c_locale.h
1761 CLOCALE_CC=config/locale/gnu/c_locale.cc
1762 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1763 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1764 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1765 CMESSAGES_H=config/locale/gnu/messages_members.h
1766 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1767 CMONEY_CC=config/locale/gnu/monetary_members.cc
1768 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1769 CTIME_H=config/locale/gnu/time_members.h
1770 CTIME_CC=config/locale/gnu/time_members.cc
1771 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1774 AC_MSG_RESULT(IEEE 1003.1)
1776 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1777 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1778 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1779 CCOLLATE_CC=config/locale/generic/collate_members.cc
1780 CCTYPE_CC=config/locale/generic/ctype_members.cc
1781 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1782 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1783 CMONEY_CC=config/locale/generic/monetary_members.cc
1784 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1785 CTIME_H=config/locale/generic/time_members.h
1786 CTIME_CC=config/locale/generic/time_members.cc
1787 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1791 # This is where the testsuite looks for locale catalogs, using the
1792 # -DLOCALEDIR define during testsuite compilation.
1793 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1794 AC_SUBST(glibcxx_localedir)
1796 # A standalone libintl (e.g., GNU libintl) may be in use.
1797 if test $USE_NLS = yes; then
1798 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1799 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1801 if test $USE_NLS = yes; then
1802 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1803 [Define if NLS translations are to be used.])
1808 AC_SUBST(CMESSAGES_H)
1809 AC_SUBST(CCODECVT_CC)
1810 AC_SUBST(CCOLLATE_CC)
1812 AC_SUBST(CMESSAGES_CC)
1814 AC_SUBST(CNUMERIC_CC)
1817 AC_SUBST(CLOCALE_CC)
1818 AC_SUBST(CLOCALE_INTERNAL_H)
1823 dnl Check for which std::allocator base class to use. The choice is
1824 dnl mapped from a subdirectory of include/ext.
1828 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1829 AC_MSG_CHECKING([for std::allocator base class])
1830 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1831 [use KIND for target std::allocator base],
1832 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1834 # If they didn't use this option switch, or if they specified --enable
1835 # with no specific model, we'll have to look for one. If they
1836 # specified --disable (???), do likewise.
1837 if test $enable_libstdcxx_allocator = no ||
1838 test $enable_libstdcxx_allocator = yes;
1840 enable_libstdcxx_allocator=auto
1843 # Either a known package, or "auto". Auto implies the default choice
1844 # for a particular platform.
1845 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1847 # Probe for host-specific support if no specific model is specified.
1849 if test $enable_libstdcxx_allocator_flag = auto; then
1850 case ${target_os} in
1851 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1852 enable_libstdcxx_allocator_flag=new
1855 enable_libstdcxx_allocator_flag=new
1859 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1862 # Set configure bits for specified locale package
1863 case ${enable_libstdcxx_allocator_flag} in
1865 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1866 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1869 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1870 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1873 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1874 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1877 ALLOCATOR_H=config/allocator/new_allocator_base.h
1878 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1881 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1882 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1886 AC_SUBST(ALLOCATOR_H)
1887 AC_SUBST(ALLOCATOR_NAME)
1892 dnl Check for whether the Boost-derived checks should be turned on.
1894 dnl --enable-concept-checks turns them on.
1895 dnl --disable-concept-checks leaves them off.
1896 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1897 dnl Where DEFAULT is either `yes' or `no'.
1899 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1900 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1901 if test $enable_concept_checks = yes; then
1902 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1903 [Define to use concept checking code from the boost libraries.])
1908 dnl Check for parallel mode pre-requisites, including OpenMP support.
1910 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1912 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1916 # See if configured libgomp/omp.h exists. (libgomp may be in
1917 # noconfigdirs but not explicitly disabled.)
1918 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1919 enable_parallel=yes;
1921 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1924 AC_MSG_CHECKING([for parallel mode support])
1925 AC_MSG_RESULT([$enable_parallel])
1926 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1931 dnl Check for which I/O library to use: stdio, or something specific.
1933 dnl Default is stdio.
1935 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1936 AC_MSG_CHECKING([for underlying I/O to use])
1937 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1938 [use target-specific I/O package], [permit stdio])
1940 # Now that libio has been removed, you can have any color you want as long
1941 # as it's black. This is one big no-op until other packages are added, but
1942 # showing the framework never hurts.
1943 case ${enable_cstdio} in
1945 CSTDIO_H=config/io/c_io_stdio.h
1946 BASIC_FILE_H=config/io/basic_file_stdio.h
1947 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1948 AC_MSG_RESULT(stdio)
1953 AC_SUBST(BASIC_FILE_H)
1954 AC_SUBST(BASIC_FILE_CC)
1959 dnl Check for "unusual" flags to pass to the compiler while building.
1961 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1962 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1963 dnl --disable-cxx-flags passes nothing.
1964 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1965 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1966 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1967 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1968 dnl If "default flags" is an empty string, the effect is the same
1969 dnl as --disable or --enable=no.
1971 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1972 AC_MSG_CHECKING([for extra compiler flags for building])
1973 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1974 [pass compiler FLAGS when building library],
1975 [case "x$enable_cxx_flags" in
1976 xno | x) enable_cxx_flags= ;;
1978 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1981 # Run through flags (either default or command-line) and set anything
1982 # extra (e.g., #defines) that must accompany particular g++ options.
1983 if test -n "$enable_cxx_flags"; then
1984 for f in $enable_cxx_flags; do
1988 *) # and we're trying to pass /what/ exactly?
1989 AC_MSG_ERROR([compiler flags start with a -]) ;;
1994 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1995 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1996 AC_SUBST(EXTRA_CXX_FLAGS)
2001 dnl Check to see if debugging libraries are to be built.
2003 dnl --enable-libstdcxx-debug
2004 dnl builds a separate set of debugging libraries in addition to the
2005 dnl normal (shared, static) libstdc++ binaries.
2007 dnl --disable-libstdcxx-debug
2008 dnl builds only one (non-debug) version of libstdc++.
2010 dnl --enable-libstdcxx-debug-flags=FLAGS
2011 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2013 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2014 dnl Where DEFAULT is either `yes' or `no'.
2016 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2017 AC_MSG_CHECKING([for additional debug build])
2018 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2019 AC_MSG_RESULT($enable_libstdcxx_debug)
2020 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2025 dnl Check for explicit debug flags.
2027 dnl --enable-libstdcxx-debug-flags='-O1'
2028 dnl is a general method for passing flags to be used when
2029 dnl building debug libraries with --enable-debug.
2031 dnl --disable-libstdcxx-debug-flags does nothing.
2032 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2033 dnl If "default flags" is an empty string, the effect is the same
2034 dnl as --disable or --enable=no.
2036 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2037 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2038 [pass compiler FLAGS when building debug library],
2039 [case "x$enable_libstdcxx_debug_flags" in
2040 xno | x) enable_libstdcxx_debug_flags= ;;
2042 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2045 # Option parsed, now set things appropriately
2046 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2047 AC_SUBST(DEBUG_FLAGS)
2049 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2054 dnl Check if the user only wants a freestanding library implementation.
2056 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2057 dnl installing only the headers required by [17.4.1.3] and the language
2058 dnl support library. More than that will be built (to keep the Makefiles
2059 dnl conveniently clean), but not installed.
2062 dnl is_hosted (yes/no)
2065 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2067 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2068 AC_ARG_ENABLE([hosted-libstdcxx],
2069 AC_HELP_STRING([--disable-hosted-libstdcxx],
2070 [only build freestanding C++ runtime support]),,
2073 enable_hosted_libstdcxx=no
2076 enable_hosted_libstdcxx=yes
2079 if test "$enable_hosted_libstdcxx" = no; then
2080 AC_MSG_NOTICE([Only freestanding libraries will be built])
2084 enable_libstdcxx_pch=no
2089 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2090 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2091 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2096 dnl Check for template specializations for the 'long long' type.
2097 dnl The result determines only whether 'long long' I/O is enabled; things
2098 dnl like numeric_limits<> specializations are always available.
2100 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2101 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2102 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2103 dnl Where DEFAULT is either `yes' or `no'.
2105 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2106 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2107 if test $enable_long_long = yes; then
2108 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2109 [Define if code specialized for long long should be used.])
2111 AC_MSG_CHECKING([for enabled long long specializations])
2112 AC_MSG_RESULT([$enable_long_long])
2117 dnl Check for template specializations for the 'wchar_t' type.
2119 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2120 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2121 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2122 dnl Where DEFAULT is either `yes' or `no'.
2124 dnl Necessary support must also be present.
2126 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2127 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2129 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2130 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2131 AC_MSG_CHECKING([for mbstate_t])
2132 AC_TRY_COMPILE([#include <wchar.h>],
2133 [mbstate_t teststate;],
2134 have_mbstate_t=yes, have_mbstate_t=no)
2135 AC_MSG_RESULT($have_mbstate_t)
2136 if test x"$have_mbstate_t" = xyes; then
2137 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2140 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2142 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2144 if test x"$enable_wchar_t" = x"yes"; then
2149 if test x"$ac_has_wchar_h" = xyes &&
2150 test x"$ac_has_wctype_h" = xyes; then
2151 AC_TRY_COMPILE([#include <wchar.h>
2212 ],[],[], [enable_wchar_t=no])
2220 if test x"$enable_wchar_t" = x"yes"; then
2221 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2222 [Define if code specialized for wchar_t should be used.])
2225 AC_MSG_CHECKING([for enabled wchar_t specializations])
2226 AC_MSG_RESULT([$enable_wchar_t])
2231 dnl Check to see if building and using a C++ precompiled header can be done.
2233 dnl --enable-libstdcxx-pch=yes
2234 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2235 dnl may work, after some light-hearted attempts to puzzle out compiler
2236 dnl support, flip bits on in include/Makefile.am
2238 dnl --disable-libstdcxx-pch
2239 dnl turns off attempts to use or build stdc++.h.gch.
2242 dnl glibcxx_PCHFLAGS
2244 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2245 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2246 if test $enable_libstdcxx_pch = yes; then
2247 AC_CACHE_CHECK([for compiler with PCH support],
2248 [glibcxx_cv_prog_CXX_pch],
2249 [ac_save_CXXFLAGS="$CXXFLAGS"
2250 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2253 echo '#include <math.h>' > conftest.h
2254 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2255 -o conftest.h.gch 1>&5 2>&1 &&
2256 echo '#error "pch failed"' > conftest.h &&
2257 echo '#include "conftest.h"' > conftest.cc &&
2258 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2260 glibcxx_cv_prog_CXX_pch=yes
2262 glibcxx_cv_prog_CXX_pch=no
2265 CXXFLAGS=$ac_save_CXXFLAGS
2268 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2271 AC_MSG_CHECKING([for enabled PCH])
2272 AC_MSG_RESULT([$enable_libstdcxx_pch])
2274 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2275 if test $enable_libstdcxx_pch = yes; then
2276 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2280 AC_SUBST(glibcxx_PCHFLAGS)
2285 dnl Check for atomic builtins.
2287 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2289 dnl This checks to see if the host supports the compiler-generated
2290 dnl builtins for atomic operations for various integral sizes. Note, this
2291 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2292 dnl that are used should be checked.
2295 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2296 dnl see: CHECK_SYNC_FETCH_AND_ADD
2299 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2300 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2302 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2305 old_CXXFLAGS="$CXXFLAGS"
2307 # Compile unoptimized.
2310 # Fake what AC_TRY_COMPILE does, without linking as this is
2311 # unnecessary for a builtins test.
2313 cat > conftest.$ac_ext << EOF
2314 [#]line __oline__ "configure"
2317 // NB: _Atomic_word not necessarily int.
2318 typedef int atomic_type;
2321 const atomic_type c3(0);
2322 __sync_fetch_and_add(&c1, c2);
2323 __sync_val_compare_and_swap(&c1, c3, c2);
2324 __sync_lock_test_and_set(&c1, c3);
2325 __sync_lock_release(&c1);
2326 __sync_synchronize();
2331 AC_MSG_CHECKING([for atomic builtins for int])
2332 if AC_TRY_EVAL(ac_compile); then
2333 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2334 enable_atomic_builtinsi=no
2336 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2337 [Define if builtin atomic operations for int are supported on this host.])
2338 enable_atomic_builtinsi=yes
2341 AC_MSG_RESULT($enable_atomic_builtinsi)
2344 cat > conftest.$ac_ext << EOF
2345 [#]line __oline__ "configure"
2348 typedef bool atomic_type;
2351 const atomic_type c3(0);
2352 __sync_fetch_and_add(&c1, c2);
2353 __sync_val_compare_and_swap(&c1, c3, c2);
2354 __sync_lock_test_and_set(&c1, c3);
2355 __sync_lock_release(&c1);
2356 __sync_synchronize();
2361 AC_MSG_CHECKING([for atomic builtins for bool])
2362 if AC_TRY_EVAL(ac_compile); then
2363 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2364 enable_atomic_builtinsb=no
2366 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2367 [Define if builtin atomic operations for bool are supported on this host.])
2368 enable_atomic_builtinsb=yes
2371 AC_MSG_RESULT($enable_atomic_builtinsb)
2374 CXXFLAGS="$old_CXXFLAGS"
2377 # Set atomicity_dir to builtins if either of above tests pass.
2378 if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
2379 atomicity_dir=cpu/generic/atomicity_builtins
2382 # If still generic, set to mutex.
2383 if test $atomicity_dir = "cpu/generic" ; then
2384 atomicity_dir=cpu/generic/atomicity_mutex
2385 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2386 if test $target_thread_file = single; then
2387 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2388 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2390 AC_MSG_WARN([They will be faked using a mutex.])
2391 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2399 dnl Check for exception handling support. If an explicit enable/disable
2400 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2401 dnl target may or may not support call frame exceptions.
2403 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2404 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2405 dnl Neither one forces an attempt at detection.
2408 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2410 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2411 AC_MSG_CHECKING([for exception model to use])
2414 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2415 [force use of builtin_setjmp for exceptions],
2416 [permit yes|no|auto])
2418 if test $enable_sjlj_exceptions = auto; then
2419 # Botheration. Now we've got to detect the exception model. Link tests
2420 # against libgcc.a are problematic since we've not been given proper -L
2421 # bits for single-tree newlib and libgloss.
2423 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2424 cat > conftest.$ac_ext << EOF
2425 [#]line __oline__ "configure"
2434 old_CXXFLAGS="$CXXFLAGS"
2436 if AC_TRY_EVAL(ac_compile); then
2437 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2438 enable_sjlj_exceptions=yes
2439 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2440 enable_sjlj_exceptions=no
2441 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2442 enable_sjlj_exceptions=no
2445 CXXFLAGS="$old_CXXFLAGS"
2449 # This is a tad weird, for hysterical raisins. We have to map
2450 # enable/disable to two different models.
2451 case $enable_sjlj_exceptions in
2453 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2454 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2455 ac_exception_model_name=sjlj
2458 ac_exception_model_name="call frame"
2461 AC_MSG_ERROR([unable to detect exception model])
2465 AC_MSG_RESULT($ac_exception_model_name)
2470 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2472 dnl --enable-visibility enables attempt to use visibility attributes.
2473 dnl --disable-visibility turns off all use of visibility attributes.
2474 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2475 dnl Where DEFAULT is 'yes'.
2477 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2478 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2480 if test x$enable_visibility = xyes ; then
2481 dnl all hail libgfortran
2482 dnl Check whether the target supports hidden visibility.
2483 AC_CACHE_CHECK([whether the target supports hidden visibility],
2484 glibcxx_cv_have_attribute_visibility, [
2485 save_CFLAGS="$CFLAGS"
2486 CFLAGS="$CFLAGS -Werror"
2487 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2488 [], glibcxx_cv_have_attribute_visibility=yes,
2489 glibcxx_cv_have_attribute_visibility=no)
2490 CFLAGS="$save_CFLAGS"])
2491 if test $glibcxx_cv_have_attribute_visibility = no; then
2492 enable_visibility=no
2496 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2497 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2502 dnl Add version tags to symbols in shared library (or not), additionally
2503 dnl marking other symbols as private/local (or not).
2505 dnl --enable-symvers=style adds a version script to the linker call when
2506 dnl creating the shared library. The choice of version script is
2507 dnl controlled by 'style'.
2508 dnl --disable-symvers does not.
2509 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2510 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2511 dnl choose a default style based on linker characteristics. Passing
2512 dnl 'no' disables versioning.
2514 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2516 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2517 [enables symbol versioning of the shared library],
2518 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2520 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2521 # don't know enough about $LD to do tricks...
2522 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2524 # Turn a 'yes' into a suitable default.
2525 if test x$enable_symvers = xyes ; then
2526 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2529 if test $with_gnu_ld = yes ; then
2532 case ${target_os} in
2534 enable_symvers=darwin ;;
2536 enable_symvers=no ;;
2542 # Check to see if 'darwin' or 'darwin-export' can win.
2543 if test x$enable_symvers = xdarwin-export ; then
2544 enable_symvers=darwin
2547 # Check to see if 'gnu' can win.
2548 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2549 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2550 AC_MSG_CHECKING([for shared libgcc])
2551 ac_save_CFLAGS="$CFLAGS"
2553 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2554 CFLAGS="$ac_save_CFLAGS"
2555 if test $glibcxx_shared_libgcc = no; then
2556 cat > conftest.c <<EOF
2557 int main (void) { return 0; }
2560 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2561 -shared -shared-libgcc -o conftest.so \
2562 conftest.c -v 2>&1 >/dev/null \
2563 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2565 rm -f conftest.c conftest.so
2566 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2567 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2568 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2569 CFLAGS="$ac_save_CFLAGS"
2572 AC_MSG_RESULT($glibcxx_shared_libgcc)
2574 # For GNU ld, we need at least this version. The format is described in
2575 # GLIBCXX_CHECK_LINKER_FEATURES above.
2576 glibcxx_min_gnu_ld_version=21400
2578 # If no shared libgcc, can't win.
2579 if test $glibcxx_shared_libgcc != yes; then
2580 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2581 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2582 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2584 elif test $with_gnu_ld != yes ; then
2586 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2587 AC_MSG_WARN([=== you are not using the GNU linker.])
2588 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2590 elif test $glibcxx_ld_is_gold = yes ; then
2591 : All versions of gold support symbol versioning.
2592 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2593 # The right tools, the right setup, but too old. Fallbacks?
2594 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2595 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2596 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2597 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2598 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2603 # Everything parsed; figure out what file to use.
2604 case $enable_symvers in
2606 SYMVER_FILE=config/abi/pre/none.ver
2609 SYMVER_FILE=config/abi/pre/gnu.ver
2610 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2611 [Define to use GNU versioning in the shared library.])
2613 gnu-versioned-namespace)
2614 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2615 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2616 [Define to use GNU namespace versioning in the shared library.])
2619 SYMVER_FILE=config/abi/pre/gnu.ver
2620 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2621 [Define to use darwin versioning in the shared library.])
2625 if test x$enable_symvers != xno ; then
2626 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2627 [Define to use symbol versioning in the shared library.])
2630 AC_SUBST(SYMVER_FILE)
2631 AC_SUBST(port_specific_symbol_files)
2632 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2633 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2634 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2635 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2636 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2638 # Now, set up compatibility support, if any.
2639 # In addition, need this to deal with std::size_t mangling in
2640 # src/compatibility.cc. In a perfect world, could use
2641 # typeid(std::size_t).name()[0] to do direct substitution.
2642 AC_MSG_CHECKING([for size_t as unsigned int])
2643 ac_save_CFLAGS="$CFLAGS"
2645 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2646 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2647 CFLAGS=$ac_save_CFLAGS
2648 if test "$glibcxx_size_t_is_i" = yes; then
2649 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2651 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2653 AC_MSG_CHECKING([for ptrdiff_t as int])
2654 ac_save_CFLAGS="$CFLAGS"
2656 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2657 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2658 CFLAGS=$ac_save_CFLAGS
2659 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2660 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2662 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2667 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2668 dnl We must stage the required headers so that they will be installed
2669 dnl with the library (unlike libgcc, the STL implementation is provided
2670 dnl solely within headers). Since we must not inject random user-space
2671 dnl macro names into user-provided C++ code, we first stage into <file>-in
2672 dnl and process to <file> with an output command. The reason for a two-
2673 dnl stage process here is to correctly handle $srcdir!=$objdir without
2674 dnl having to write complex code (the sed commands to clean the macro
2675 dnl namespace are complex and fragile enough as it is). We must also
2676 dnl add a relative path so that -I- is supported properly.
2679 dnl glibcxx_thread_h
2682 dnl HAVE_GTHR_DEFAULT
2684 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2685 AC_MSG_CHECKING([for thread model used by GCC])
2686 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2687 AC_MSG_RESULT([$target_thread_file])
2689 if test $target_thread_file != single; then
2690 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2691 [Define if gthr-default.h exists
2692 (meaning that threading support is enabled).])
2695 glibcxx_thread_h=gthr-$target_thread_file.h
2697 dnl Check for __GTHREADS define.
2698 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2699 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2705 AC_SUBST(glibcxx_thread_h)
2709 # Check whether LC_MESSAGES is available in <locale.h>.
2710 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2712 # This file file be copied and used freely without restrictions. It can
2713 # be used in projects which are not available under the GNU Public License
2714 # but which still want to provide support for the GNU gettext functionality.
2715 # Please note that the actual code is *not* freely available.
2716 AC_DEFUN([AC_LC_MESSAGES], [
2717 AC_CHECK_HEADER(locale.h, [
2718 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2719 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2720 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2721 if test $ac_cv_val_LC_MESSAGES = yes; then
2722 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2723 [Define if LC_MESSAGES is available in <locale.h>.])
2728 # Macros from the top-level gcc directory.
2729 m4_include([../config/tls.m4])