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 $host.
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ python src doc po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${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 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
83 # available). Uncomment the next line to force a particular method.
89 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
93 # Set up safe default values for all subsequent AM_CONDITIONAL tests
94 # which are themselves conditionally expanded.
95 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
96 ## other macros from doing the same. This should be automated.) -pme
98 # Check for uClibc since Linux platforms use different configuration
99 # directories depending on the C library in use.
100 AC_EGREP_CPP([_using_uclibc], [
105 ], uclibc=yes, uclibc=no)
107 # Find platform-specific directories containing configuration info.
108 # Also possibly modify flags used elsewhere, as needed by the platform.
114 dnl Tests for newer compiler features, or features that are present in newer
115 dnl compiler versions but not older compiler versions still in use, should
119 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
120 dnl new inlining code or the new system_header pragma will die on -Werror.
121 dnl Leave it out by default and use maint-mode to use it.
122 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
123 dnl compiler supports it and the user has not requested debug mode.
125 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
126 # All these tests are for C++; save the language and the compiler flags.
127 # The CXXFLAGS thing is suspicious, but based on similar bits previously
128 # found in GLIBCXX_CONFIGURE.
131 ac_test_CXXFLAGS="${CXXFLAGS+set}"
132 ac_save_CXXFLAGS="$CXXFLAGS"
134 # Check for maintainer-mode bits.
135 if test x"$USE_MAINTAINER_MODE" = xno; then
141 # Check for -ffunction-sections -fdata-sections
142 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
143 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
144 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
145 if test "$ac_test_CXXFLAGS" = set; then
146 CXXFLAGS="$ac_save_CXXFLAGS"
148 # this is the suspicious part
151 if test x"$ac_fdsections" = x"yes"; then
152 SECTION_FLAGS='-ffunction-sections -fdata-sections'
154 AC_MSG_RESULT($ac_fdsections)
158 AC_SUBST(SECTION_FLAGS)
163 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
164 dnl the native linker is in use, all variables will be defined to something
165 dnl safe (like an empty string).
168 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
169 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
170 dnl LD (as a side effect of testing)
173 dnl glibcxx_ld_is_gold (set to "no" or "yes")
174 dnl glibcxx_gnu_ld_version (possibly)
176 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
177 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
179 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
180 # If we're not using GNU ld, then there's no point in even trying these
181 # tests. Check for that first. We should have already tested for gld
182 # by now (in libtool), but require it now just to be safe...
183 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
184 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
185 AC_REQUIRE([AC_PROG_LD])
186 AC_REQUIRE([AC_PROG_AWK])
188 # The name set by libtool depends on the version of libtool. Shame on us
189 # for depending on an impl detail, but c'est la vie. Older versions used
190 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
191 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
192 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
193 # set (hence we're using an older libtool), then set it.
194 if test x${with_gnu_ld+set} != xset; then
195 if test x${ac_cv_prog_gnu_ld+set} != xset; then
196 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
199 with_gnu_ld=$ac_cv_prog_gnu_ld
203 # Start by getting the version number. I think the libtool test already
204 # does some of this, but throws away the result.
205 glibcxx_ld_is_gold=no
206 if test x"$with_gnu_ld" = x"yes"; then
207 AC_MSG_CHECKING([for ld version])
209 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
210 glibcxx_ld_is_gold=yes
212 ldver=`$LD --version 2>/dev/null | head -1 | \
213 sed -e 's/GNU \(go\)\{0,1\}ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\4/'`
215 glibcxx_gnu_ld_version=`echo $ldver | \
216 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
217 AC_MSG_RESULT($glibcxx_gnu_ld_version)
221 glibcxx_have_gc_sections=no
222 if test "$glibcxx_ld_is_gold" = "yes"; then
223 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
224 glibcxx_have_gc_sections=yes
227 glibcxx_gcsections_min_ld=21602
228 if test x"$with_gnu_ld" = x"yes" &&
229 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
230 glibcxx_have_gc_sections=yes
233 if test "$glibcxx_have_gc_sections" = "yes"; then
234 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
235 # NB: This flag only works reliably after 2.16.1. Configure tests
236 # for this are difficult, so hard wire a value that should work.
238 ac_test_CFLAGS="${CFLAGS+set}"
239 ac_save_CFLAGS="$CFLAGS"
240 CFLAGS='-Wl,--gc-sections'
242 # Check for -Wl,--gc-sections
243 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
244 AC_TRY_LINK([ int one(void) { return 1; }
245 int two(void) { return 2; }
246 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
247 if test "$ac_gcsections" = "yes"; then
250 if $CC -c conftest.c; then
251 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
252 grep "Warning: gc-sections option ignored" > /dev/null; then
256 rm -f conftest.c conftest.o conftest
258 if test "$ac_gcsections" = "yes"; then
259 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
261 AC_MSG_RESULT($ac_gcsections)
263 if test "$ac_test_CFLAGS" = set; then
264 CFLAGS="$ac_save_CFLAGS"
266 # this is the suspicious part
272 # Note this is only for shared objects.
274 if test x"$with_gnu_ld" = x"yes"; then
275 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
276 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
277 if test -n "$cxx_z_relo"; then
278 OPT_LDFLAGS="-Wl,-z,relro"
281 AC_MSG_RESULT($ac_ld_relro)
284 # Set linker optimization flags.
285 if test x"$with_gnu_ld" = x"yes"; then
286 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
289 AC_SUBST(SECTION_LDFLAGS)
290 AC_SUBST(OPT_LDFLAGS)
295 dnl Check for headers for, and arguments to, the setrlimit() function.
296 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
299 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
300 dnl various HAVE_LIMIT_* for individual limit names
302 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
303 AC_MSG_CHECKING([for RLIMIT_$1])
306 #include <sys/time.h>
307 #include <sys/resource.h>
309 [ int f = RLIMIT_$1 ; ],
310 [glibcxx_mresult=1], [glibcxx_mresult=0])
311 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
312 [Only used in build directory testsuite_hooks.h.])
313 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
317 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
318 setrlimit_have_headers=yes
319 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
321 [setrlimit_have_headers=no])
322 # If don't have the headers, then we can't run the tests now, and we
323 # won't be seeing any of these during testsuite compilation.
324 if test $setrlimit_have_headers = yes; then
325 # Can't do these in a loop, else the resulting syntax is wrong.
326 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
327 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
328 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
329 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
330 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
332 # Check for rlimit, setrlimit.
333 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
336 #include <sys/time.h>
337 #include <sys/resource.h>
341 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
345 AC_MSG_CHECKING([for testsuite resource limits support])
346 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
348 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
349 [Define if using setrlimit to set resource limits during
354 AC_MSG_RESULT($ac_res_limits)
359 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
360 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
362 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
366 ac_save_CXXFLAGS="$CXXFLAGS"
367 CXXFLAGS="$CXXFLAGS -fno-exceptions"
369 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
370 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
371 GCC_TRY_COMPILE_OR_LINK(
372 [#include <sys/stat.h>],
375 S_ISREG(buffer.st_mode);],
376 [glibcxx_cv_S_ISREG=yes],
377 [glibcxx_cv_S_ISREG=no])
379 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
380 GCC_TRY_COMPILE_OR_LINK(
381 [#include <sys/stat.h>],
384 S_IFREG & buffer.st_mode;],
385 [glibcxx_cv_S_IFREG=yes],
386 [glibcxx_cv_S_IFREG=no])
389 if test $glibcxx_cv_S_ISREG = yes; then
390 AC_DEFINE(HAVE_S_ISREG, 1,
391 [Define if S_IFREG is available in <sys/stat.h>.])
393 elif test $glibcxx_cv_S_IFREG = yes; then
394 AC_DEFINE(HAVE_S_IFREG, 1,
395 [Define if S_IFREG is available in <sys/stat.h>.])
400 CXXFLAGS="$ac_save_CXXFLAGS"
406 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
408 AC_DEFUN([GLIBCXX_CHECK_POLL], [
412 ac_save_CXXFLAGS="$CXXFLAGS"
413 CXXFLAGS="$CXXFLAGS -fno-exceptions"
415 AC_MSG_CHECKING([for poll])
416 AC_CACHE_VAL(glibcxx_cv_POLL, [
417 GCC_TRY_COMPILE_OR_LINK(
419 [struct pollfd pfd[1];
420 pfd[0].events = POLLIN;
422 [glibcxx_cv_POLL=yes],
423 [glibcxx_cv_POLL=no])
425 if test $glibcxx_cv_POLL = yes; then
426 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
428 AC_MSG_RESULT($glibcxx_cv_POLL)
430 CXXFLAGS="$ac_save_CXXFLAGS"
436 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
438 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
442 ac_save_CXXFLAGS="$CXXFLAGS"
443 CXXFLAGS="$CXXFLAGS -fno-exceptions"
445 AC_MSG_CHECKING([for writev])
446 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
447 GCC_TRY_COMPILE_OR_LINK(
448 [#include <sys/uio.h>],
449 [struct iovec iov[2];
451 [glibcxx_cv_WRITEV=yes],
452 [glibcxx_cv_WRITEV=no])
454 if test $glibcxx_cv_WRITEV = yes; then
455 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
457 AC_MSG_RESULT($glibcxx_cv_WRITEV)
459 CXXFLAGS="$ac_save_CXXFLAGS"
465 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
466 dnl Also check whether int64_t is actually a typedef to long or long long.
468 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
473 AC_MSG_CHECKING([for int64_t])
474 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
476 [#include <stdint.h>],
478 [glibcxx_cv_INT64_T=yes],
479 [glibcxx_cv_INT64_T=no])
482 if test $glibcxx_cv_INT64_T = yes; then
483 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
484 AC_MSG_RESULT($glibcxx_cv_INT64_T)
486 AC_MSG_CHECKING([for int64_t as long])
487 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
490 template<typename, typename> struct same { enum { value = -1 }; };
491 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
492 int array[same<int64_t, long>::value];], [],
493 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
496 if test $glibcxx_cv_int64_t_long = yes; then
497 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
498 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
501 AC_MSG_CHECKING([for int64_t as long long])
502 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
505 template<typename, typename> struct same { enum { value = -1 }; };
506 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
507 int array[same<int64_t, long long>::value];], [],
508 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
511 if test $glibcxx_cv_int64_t_long_long = yes; then
512 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
513 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
522 dnl Check whether LFS support is available.
524 AC_DEFUN([GLIBCXX_CHECK_LFS], [
527 ac_save_CXXFLAGS="$CXXFLAGS"
528 CXXFLAGS="$CXXFLAGS -fno-exceptions"
529 AC_MSG_CHECKING([for LFS support])
530 AC_CACHE_VAL(glibcxx_cv_LFS, [
531 GCC_TRY_COMPILE_OR_LINK(
534 #include <sys/stat.h>
538 fseeko64(fp, 0, SEEK_CUR);
540 lseek64(1, 0, SEEK_CUR);
543 [glibcxx_cv_LFS=yes],
546 if test $glibcxx_cv_LFS = yes; then
547 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
549 AC_MSG_RESULT($glibcxx_cv_LFS)
550 CXXFLAGS="$ac_save_CXXFLAGS"
556 dnl Check for whether a fully dynamic basic_string implementation should
557 dnl be turned on, that does not put empty objects in per-process static
558 dnl memory (mostly useful together with shared memory allocators, see PR
559 dnl libstdc++/16612 for details).
561 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
562 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
563 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
564 dnl Where DEFAULT is either `yes' or `no'.
566 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
567 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
568 if test $enable_fully_dynamic_string = yes; then
569 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
570 [Define if a fully dynamic basic_string is wanted.])
576 dnl Does any necessary configuration of the testsuite directory. Generates
577 dnl the testsuite_hooks.h header.
579 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
583 dnl GLIBCXX_TEST_WCHAR_T
584 dnl GLIBCXX_TEST_THREAD
588 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
589 if $GLIBCXX_IS_NATIVE ; then
590 # Do checks for resource limit functions.
591 GLIBCXX_CHECK_SETRLIMIT
593 # Look for setenv, so that extended locale tests can be performed.
594 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
597 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
598 test $enable_symvers != no; then
601 enable_abi_check=no ;;
603 enable_abi_check=yes ;;
606 # Only build this as native, since automake does not understand
611 # Export file names for ABI checking.
612 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
613 AC_SUBST(baseline_dir)
618 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
622 dnl TOPLEVEL_INCLUDES
624 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
625 # Used for every C++ compile we perform.
627 -I$glibcxx_builddir/include/$host_alias \
628 -I$glibcxx_builddir/include \
629 -I$glibcxx_srcdir/libsupc++"
631 # For Canadian crosses, pick this up too.
632 if test $CANADIAN = yes; then
633 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
636 # Stuff in the actual top level. Currently only used by libsupc++ to
637 # get unwind* headers from the gcc dir.
638 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
639 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
641 # Now, export this to all the little Makefiles....
642 AC_SUBST(GLIBCXX_INCLUDES)
643 AC_SUBST(TOPLEVEL_INCLUDES)
648 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
649 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
652 dnl OPTIMIZE_CXXFLAGS
655 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
656 # Optimization flags that are probably a good idea for thrill-seekers. Just
657 # uncomment the lines below and make, everything else is ready to go...
658 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
659 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
660 AC_SUBST(OPTIMIZE_CXXFLAGS)
662 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
668 dnl All installation directory information is determined here.
672 dnl glibcxx_prefixdir
673 dnl glibcxx_toolexecdir
674 dnl glibcxx_toolexeclibdir
676 dnl Assumes cross_compiling bits already done, and with_cross_host in
679 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
680 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
681 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
682 glibcxx_toolexecdir=no
683 glibcxx_toolexeclibdir=no
684 glibcxx_prefixdir=$prefix
686 AC_MSG_CHECKING([for gxx-include-dir])
687 AC_ARG_WITH([gxx-include-dir],
688 AC_HELP_STRING([--with-gxx-include-dir=DIR],
689 [installation directory for include files]),
691 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
692 no) gxx_include_dir=no ;;
693 *) gxx_include_dir=$withval ;;
695 [gxx_include_dir=no])
696 AC_MSG_RESULT($gxx_include_dir)
698 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
699 AC_ARG_ENABLE([version-specific-runtime-libs],
700 AC_HELP_STRING([--enable-version-specific-runtime-libs],
701 [Specify that runtime libraries should be installed in a compiler-specific directory]),
702 [case "$enableval" in
703 yes) version_specific_libs=yes ;;
704 no) version_specific_libs=no ;;
705 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
707 [version_specific_libs=no])
708 AC_MSG_RESULT($version_specific_libs)
710 # Default case for install directory for include files.
711 if test $version_specific_libs = no && test $gxx_include_dir = no; then
712 gxx_include_dir='include/c++/${gcc_version}'
713 if test -n "$with_cross_host" &&
714 test x"$with_cross_host" != x"no"; then
715 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
717 gxx_include_dir='${prefix}/'"$gxx_include_dir"
721 # Version-specific runtime libs processing.
722 if test $version_specific_libs = yes; then
723 # Need the gcc compiler version to know where to install libraries
724 # and header files if --enable-version-specific-runtime-libs option
725 # is selected. FIXME: these variables are misnamed, there are
726 # no executables installed in _toolexecdir or _toolexeclibdir.
727 if test x"$gxx_include_dir" = x"no"; then
728 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
730 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
731 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
734 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
735 # Install a library built with a cross compiler in tooldir, not libdir.
736 if test x"$glibcxx_toolexecdir" = x"no"; then
737 if test -n "$with_cross_host" &&
738 test x"$with_cross_host" != x"no"; then
739 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
740 glibcxx_toolexeclibdir='${toolexecdir}/lib'
742 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
743 glibcxx_toolexeclibdir='${libdir}'
745 multi_os_directory=`$CXX -print-multi-os-directory`
746 case $multi_os_directory in
747 .) ;; # Avoid trailing /.
748 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
752 AC_MSG_CHECKING([for install location])
753 AC_MSG_RESULT($gxx_include_dir)
755 AC_SUBST(glibcxx_prefixdir)
756 AC_SUBST(gxx_include_dir)
757 AC_SUBST(glibcxx_toolexecdir)
758 AC_SUBST(glibcxx_toolexeclibdir)
764 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
765 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
766 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
768 dnl See docs/html/17_intro/configury.html#enable for documentation.
770 m4_define([GLIBCXX_ENABLE],[dnl
771 m4_define([_g_switch],[--enable-$1])dnl
772 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
773 AC_ARG_ENABLE($1,_g_help,
778 m4_bpatsubst([$5],[permit ])) ;;
779 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
780 dnl Idea for future: generate a URL pointing to
781 dnl "onlinedocs/configopts.html#whatever"
788 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
792 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
793 m4_undefine([_g_switch])dnl
794 m4_undefine([_g_help])dnl
799 dnl Check for ISO/IEC 9899:1999 "C99" support.
801 dnl --enable-c99 defines _GLIBCXX_USE_C99
802 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
803 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
804 dnl Where DEFAULT is either `yes' or `no'.
805 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
807 AC_DEFUN([GLIBCXX_ENABLE_C99], [
808 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
810 if test x"$enable_c99" = x"yes"; then
815 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
816 # undefined and fake C99 facilities - like pre-standard snprintf - may be
817 # spuriously enabled.
818 # Long term, -std=c++0x could be even better, could manage to explicitely
819 # request C99 facilities to the underlying C headers.
820 ac_save_CXXFLAGS="$CXXFLAGS"
821 CXXFLAGS="$CXXFLAGS -std=c++98"
823 ac_save_gcc_no_link="$gcc_no_link"
825 if test x$gcc_no_link != xyes; then
826 # Use -fno-exceptions to that the C driver can link these tests without
827 # hitting undefined references to personality routines.
828 CXXFLAGS="$CXXFLAGS -fno-exceptions"
829 AC_CHECK_LIB(m, sin, [
832 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
837 # Check for the existence of <math.h> functions used if C99 is enabled.
838 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
839 AC_CACHE_VAL(glibcxx_cv_c99_math, [
840 GCC_TRY_COMPILE_OR_LINK(
842 volatile double d1, d2;
850 i = isgreater(d1, d2);
851 i = isgreaterequal(d1, d2);
853 i = islessequal(d1, d2);
854 i = islessgreater(d1, d2);
855 i = islessgreater(d1, d2);
856 i = isunordered(d1, d2);
857 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
859 AC_MSG_RESULT($glibcxx_cv_c99_math)
860 if test x"$glibcxx_cv_c99_math" = x"yes"; then
861 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
862 [Define if C99 functions or macros in <math.h> should be imported
863 in <cmath> in namespace std.])
866 # Check for the existence of <complex.h> complex math functions.
867 # This is necessary even though libstdc++ uses the builtin versions
868 # of these functions, because if the builtin cannot be used, a reference
869 # to the library function is emitted.
870 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
871 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
872 glibcxx_cv_c99_complex=no;
873 if test x"$ac_has_complex_h" = x"yes"; then
874 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
875 GCC_TRY_COMPILE_OR_LINK(
876 [#include <complex.h>
877 typedef __complex__ float float_type;
878 typedef __complex__ double double_type;
879 typedef __complex__ long double ld_type;
880 volatile float_type tmpf;
881 volatile double_type tmpd;
882 volatile ld_type tmpld;
885 volatile long double ld;],
897 tmpf = cpowf(tmpf, tmpf);
910 tmpd = cpow(tmpd, tmpd);
914 tmpld = ccosl(tmpld);
915 tmpld = ccoshl(tmpld);
916 tmpld = cexpl(tmpld);
917 tmpld = clogl(tmpld);
918 tmpld = csinl(tmpld);
919 tmpld = csinhl(tmpld);
920 tmpld = csqrtl(tmpld);
921 tmpld = ctanl(tmpld);
922 tmpld = ctanhl(tmpld);
923 tmpld = cpowl(tmpld, tmpld);
924 tmpld = cprojl(tmpld);
925 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
927 AC_MSG_RESULT($glibcxx_cv_c99_complex)
928 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
929 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
930 [Define if C99 functions in <complex.h> should be used in
931 <complex>. Using compiler builtins for these functions requires
932 corresponding C99 library functions to be present.])
935 # Check for the existence in <stdio.h> of vscanf, et. al.
936 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
937 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
938 GCC_TRY_COMPILE_OR_LINK(
941 void foo(char* fmt, ...)
943 va_list args; va_start(args, fmt);
944 vfscanf(stderr, "%i", args);
946 vsnprintf(fmt, 0, "%i", args);
947 vsscanf(fmt, "%i", args);
949 [snprintf("12", 0, "%i");],
950 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
952 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
954 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
955 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
956 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
957 GCC_TRY_COMPILE_OR_LINK(
960 volatile long double ld;
961 volatile unsigned long long ll;
964 f = strtof("gnu", &tmp);
965 ld = strtold("gnu", &tmp);
966 ll = strtoll("gnu", &tmp, 10);
967 ll = strtoull("gnu", &tmp, 10);
969 mydivt = lldiv(10,1);
974 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
976 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
978 # Check for the existence in <wchar.h> of wcstold, etc.
979 glibcxx_cv_c99_wchar=no;
980 if test x"$ac_has_wchar_h" = xyes &&
981 test x"$ac_has_wctype_h" = xyes; then
982 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
983 AC_TRY_COMPILE([#include <wchar.h>
990 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
992 # Checks for wide character functions that may not be present.
993 # Injection of these is wrapped with guard macros.
994 # NB: only put functions here, instead of immediately above, if
995 # absolutely necessary.
996 AC_TRY_COMPILE([#include <wchar.h>
997 namespace test { using ::vfwscanf; } ], [],
998 [AC_DEFINE(HAVE_VFWSCANF,1,
999 [Defined if vfwscanf exists.])],[])
1001 AC_TRY_COMPILE([#include <wchar.h>
1002 namespace test { using ::vswscanf; } ], [],
1003 [AC_DEFINE(HAVE_VSWSCANF,1,
1004 [Defined if vswscanf exists.])],[])
1006 AC_TRY_COMPILE([#include <wchar.h>
1007 namespace test { using ::vwscanf; } ], [],
1008 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1010 AC_TRY_COMPILE([#include <wchar.h>
1011 namespace test { using ::wcstof; } ], [],
1012 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1014 AC_TRY_COMPILE([#include <wctype.h>],
1015 [ wint_t t; int i = iswblank(t);],
1016 [AC_DEFINE(HAVE_ISWBLANK,1,
1017 [Defined if iswblank exists.])],[])
1019 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1022 # Option parsed, now set things appropriately.
1023 if test x"$glibcxx_cv_c99_math" = x"no" ||
1024 test x"$glibcxx_cv_c99_complex" = x"no" ||
1025 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1026 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1027 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1030 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1031 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1032 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1035 gcc_no_link="$ac_save_gcc_no_link"
1036 LIBS="$ac_save_LIBS"
1037 CXXFLAGS="$ac_save_CXXFLAGS"
1041 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1042 AC_MSG_RESULT($enable_c99)
1047 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1048 dnl implementation of 20.8.5 [time.clock], and 30.2.2 [thread.thread.this]
1049 dnl in the current C++0x working draft.
1051 dnl --enable-libstdcxx-time
1052 dnl --enable-libstdcxx-time=yes
1053 dnl checks for the availability of monotonic and realtime clocks,
1054 dnl nanosleep and sched_yield in libc and libposix4 and, in case, links
1056 dnl --enable-libstdcxx-time=rt
1057 dnl also searches (and, in case, links) librt. Note that this is
1058 dnl not always desirable because, in glibc, for example, in turn it
1059 dnl triggers the linking of libpthread too, which activates locking,
1060 dnl a large overhead for single-thread programs.
1061 dnl --enable-libstdcxx-time=no
1062 dnl --disable-libstdcxx-time
1063 dnl disables the checks completely
1065 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1067 AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
1068 GLIBCXX_ENABLE(libstdcxx-time,$1,[=KIND],
1069 [use KIND for check type],
1074 ac_save_CXXFLAGS="$CXXFLAGS"
1075 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1076 ac_save_LIBS="$LIBS"
1078 ac_has_clock_monotonic=no;
1079 ac_has_clock_realtime=no;
1081 if test x"$enable_libstdcxx_time" != x"no"; then
1083 if test x"$enable_libstdcxx_time" = x"rt"; then
1084 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1085 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1087 AC_SEARCH_LIBS(clock_gettime, [posix4])
1088 AC_SEARCH_LIBS(nanosleep, [posix4])
1091 case "$ac_cv_search_clock_gettime" in
1092 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1095 case "$ac_cv_search_nanosleep" in
1096 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1100 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1102 case "$ac_cv_search_sched_yield" in
1104 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1105 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1106 [ Defined if sched_yield is available. ])
1109 if test x"$enable_libstdcxx_time" = x"rt"; then
1110 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1111 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1112 [ Defined if sched_yield is available. ])
1116 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1117 [ Defined if sched_yield is available. ])
1121 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1123 if test x"$ac_has_unistd_h" = x"yes"; then
1124 AC_MSG_CHECKING([for monotonic clock])
1126 [#include <unistd.h>
1129 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1132 clock_gettime(CLOCK_MONOTONIC, &tp);
1133 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1135 AC_MSG_RESULT($ac_has_clock_monotonic)
1137 AC_MSG_CHECKING([for realtime clock])
1139 [#include <unistd.h>
1142 [#if _POSIX_TIMERS > 0
1145 clock_gettime(CLOCK_REALTIME, &tp);
1146 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1148 AC_MSG_RESULT($ac_has_clock_realtime)
1150 AC_MSG_CHECKING([for nanosleep])
1152 [#include <unistd.h>
1155 [#if _POSIX_TIMERS > 0
1159 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1161 AC_MSG_RESULT($ac_has_nanosleep)
1165 if test x"$ac_has_clock_monotonic" = x"yes"; then
1166 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1167 [ Defined if clock_gettime has monotonic clock support. ])
1170 if test x"$ac_has_clock_realtime" = x"yes"; then
1171 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1172 [ Defined if clock_gettime has realtime clock support. ])
1175 if test x"$ac_has_nanosleep" = x"yes"; then
1176 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1177 [ Defined if nanosleep is available. ])
1180 AC_SUBST(GLIBCXX_LIBS)
1182 CXXFLAGS="$ac_save_CXXFLAGS"
1183 LIBS="$ac_save_LIBS"
1188 dnl Check for gettimeofday, used in the implementation of 20.8.5
1189 dnl [time.clock] in the current C++0x working draft.
1191 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1193 AC_MSG_CHECKING([for gettimeofday])
1197 ac_save_CXXFLAGS="$CXXFLAGS"
1198 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1200 ac_has_gettimeofday=no;
1201 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1202 if test x"$ac_has_sys_time_h" = x"yes"; then
1203 AC_MSG_CHECKING([for gettimeofday])
1204 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1205 [timeval tv; gettimeofday(&tv, 0);],
1206 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1208 AC_MSG_RESULT($ac_has_gettimeofday)
1211 if test x"$ac_has_gettimeofday" = x"yes"; then
1212 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1213 [ Defined if gettimeofday is available. ])
1216 CXXFLAGS="$ac_save_CXXFLAGS"
1221 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1222 dnl facilities in Chapter 8, "C compatibility".
1224 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1229 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1230 # undefined and fake C99 facilities may be spuriously enabled.
1231 ac_save_CXXFLAGS="$CXXFLAGS"
1232 CXXFLAGS="$CXXFLAGS -std=c++98"
1234 # Check for the existence of <complex.h> complex math functions used
1236 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1237 ac_c99_complex_tr1=no;
1238 if test x"$ac_has_complex_h" = x"yes"; then
1239 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1240 AC_TRY_COMPILE([#include <complex.h>],
1241 [typedef __complex__ float float_type; float_type tmpf;
1248 typedef __complex__ double double_type; double_type tmpd;
1255 typedef __complex__ long double ld_type; ld_type tmpld;
1262 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1264 AC_MSG_RESULT($ac_c99_complex_tr1)
1265 if test x"$ac_c99_complex_tr1" = x"yes"; then
1266 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1267 [Define if C99 functions in <complex.h> should be used in
1268 <tr1/complex>. Using compiler builtins for these functions
1269 requires corresponding C99 library functions to be present.])
1272 # Check for the existence of <ctype.h> functions.
1273 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1274 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1275 AC_TRY_COMPILE([#include <ctype.h>],
1279 ],[glibcxx_cv_c99_ctype_tr1=yes],
1280 [glibcxx_cv_c99_ctype_tr1=no])
1282 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1283 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1284 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1285 [Define if C99 functions in <ctype.h> should be imported in
1286 <tr1/cctype> in namespace std::tr1.])
1289 # Check for the existence of <fenv.h> functions.
1290 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1292 if test x"$ac_has_fenv_h" = x"yes"; then
1293 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1294 AC_TRY_COMPILE([#include <fenv.h>],
1299 ret = feclearexcept(except);
1300 ret = fegetexceptflag(pflag, except);
1301 ret = feraiseexcept(except);
1302 ret = fesetexceptflag(pflag, except);
1303 ret = fetestexcept(except);
1305 ret = fesetround(mode);
1306 ret = fegetenv(penv);
1307 ret = feholdexcept(penv);
1308 ret = fesetenv(penv);
1309 ret = feupdateenv(penv);
1310 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1312 AC_MSG_RESULT($ac_c99_fenv_tr1)
1313 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1314 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1315 [Define if C99 functions in <fenv.h> should be imported in
1316 <tr1/cfenv> in namespace std::tr1.])
1319 # Check for the existence of <stdint.h> types.
1320 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1321 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1322 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1323 #define __STDC_CONSTANT_MACROS
1324 #include <stdint.h>],
1325 [typedef int8_t my_int8_t;
1326 my_int8_t i8 = INT8_MIN;
1328 typedef int16_t my_int16_t;
1329 my_int16_t i16 = INT16_MIN;
1331 typedef int32_t my_int32_t;
1332 my_int32_t i32 = INT32_MIN;
1334 typedef int64_t my_int64_t;
1335 my_int64_t i64 = INT64_MIN;
1337 typedef int_fast8_t my_int_fast8_t;
1338 my_int_fast8_t if8 = INT_FAST8_MIN;
1339 if8 = INT_FAST8_MAX;
1340 typedef int_fast16_t my_int_fast16_t;
1341 my_int_fast16_t if16 = INT_FAST16_MIN;
1342 if16 = INT_FAST16_MAX;
1343 typedef int_fast32_t my_int_fast32_t;
1344 my_int_fast32_t if32 = INT_FAST32_MIN;
1345 if32 = INT_FAST32_MAX;
1346 typedef int_fast64_t my_int_fast64_t;
1347 my_int_fast64_t if64 = INT_FAST64_MIN;
1348 if64 = INT_FAST64_MAX;
1349 typedef int_least8_t my_int_least8_t;
1350 my_int_least8_t il8 = INT_LEAST8_MIN;
1351 il8 = INT_LEAST8_MAX;
1352 typedef int_least16_t my_int_least16_t;
1353 my_int_least16_t il16 = INT_LEAST16_MIN;
1354 il16 = INT_LEAST16_MAX;
1355 typedef int_least32_t my_int_least32_t;
1356 my_int_least32_t il32 = INT_LEAST32_MIN;
1357 il32 = INT_LEAST32_MAX;
1358 typedef int_least64_t my_int_least64_t;
1359 my_int_least64_t il64 = INT_LEAST64_MIN;
1360 il64 = INT_LEAST64_MAX;
1361 typedef intmax_t my_intmax_t;
1362 my_intmax_t im = INTMAX_MAX;
1364 typedef intptr_t my_intptr_t;
1365 my_intptr_t ip = INTPTR_MAX;
1367 typedef uint8_t my_uint8_t;
1368 my_uint8_t ui8 = UINT8_MAX;
1370 typedef uint16_t my_uint16_t;
1371 my_uint16_t ui16 = UINT16_MAX;
1373 typedef uint32_t my_uint32_t;
1374 my_uint32_t ui32 = UINT32_MAX;
1376 typedef uint64_t my_uint64_t;
1377 my_uint64_t ui64 = UINT64_MAX;
1379 typedef uint_fast8_t my_uint_fast8_t;
1380 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1381 uif8 = UINT_FAST8_MAX;
1382 typedef uint_fast16_t my_uint_fast16_t;
1383 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1384 uif16 = UINT_FAST16_MAX;
1385 typedef uint_fast32_t my_uint_fast32_t;
1386 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1387 uif32 = UINT_FAST32_MAX;
1388 typedef uint_fast64_t my_uint_fast64_t;
1389 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1390 uif64 = UINT_FAST64_MAX;
1391 typedef uint_least8_t my_uint_least8_t;
1392 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1393 uil8 = UINT_LEAST8_MAX;
1394 typedef uint_least16_t my_uint_least16_t;
1395 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1396 uil16 = UINT_LEAST16_MAX;
1397 typedef uint_least32_t my_uint_least32_t;
1398 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1399 uil32 = UINT_LEAST32_MAX;
1400 typedef uint_least64_t my_uint_least64_t;
1401 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1402 uil64 = UINT_LEAST64_MAX;
1403 typedef uintmax_t my_uintmax_t;
1404 my_uintmax_t uim = UINTMAX_MAX;
1406 typedef uintptr_t my_uintptr_t;
1407 my_uintptr_t uip = UINTPTR_MAX;
1409 ],[glibcxx_cv_c99_stdint_tr1=yes],
1410 [glibcxx_cv_c99_stdint_tr1=no])
1412 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1413 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1414 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1415 [Define if C99 types in <stdint.h> should be imported in
1416 <tr1/cstdint> in namespace std::tr1.])
1419 # Check for the existence of <math.h> functions.
1420 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1421 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1422 AC_TRY_COMPILE([#include <math.h>],
1423 [typedef double_t my_double_t;
1424 typedef float_t my_float_t;
1438 copysignf(0.0f, 0.0f);
1439 copysignl(0.0l, 0.0l);
1456 fmaf(0.0f, 0.0f, 0.0f);
1457 fmal(0.0l, 0.0l, 0.0l);
1500 nextafter(0.0, 0.0);
1501 nextafterf(0.0f, 0.0f);
1502 nextafterl(0.0l, 0.0l);
1503 nexttoward(0.0, 0.0);
1504 nexttowardf(0.0f, 0.0f);
1505 nexttowardl(0.0l, 0.0l);
1506 remainder(0.0, 0.0);
1507 remainderf(0.0f, 0.0f);
1508 remainderl(0.0l, 0.0l);
1509 remquo(0.0, 0.0, 0);
1510 remquof(0.0f, 0.0f, 0);
1511 remquol(0.0l, 0.0l, 0);
1530 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1532 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1533 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1534 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1535 [Define if C99 functions or macros in <math.h> should be imported
1536 in <tr1/cmath> in namespace std::tr1.])
1539 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1540 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1541 ac_c99_inttypes_tr1=no;
1542 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1543 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1544 AC_TRY_COMPILE([#include <inttypes.h>],
1545 [intmax_t i, numer, denom, base;
1548 intmax_t ret = imaxabs(i);
1549 imaxdiv_t dret = imaxdiv(numer, denom);
1550 ret = strtoimax(s, endptr, base);
1551 uintmax_t uret = strtoumax(s, endptr, base);
1552 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1554 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1555 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1556 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1557 [Define if C99 functions in <inttypes.h> should be imported in
1558 <tr1/cinttypes> in namespace std::tr1.])
1561 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't
1562 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1563 ac_c99_inttypes_wchar_t_tr1=no;
1564 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1565 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1566 AC_TRY_COMPILE([#include <inttypes.h>],
1570 intmax_t ret = wcstoimax(s, endptr, base);
1571 uintmax_t uret = wcstoumax(s, endptr, base);
1572 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1573 [ac_c99_inttypes_wchar_t_tr1=no])
1575 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1576 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1577 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1578 [Define if wchar_t C99 functions in <inttypes.h> should be
1579 imported in <tr1/cinttypes> in namespace std::tr1.])
1582 # Check for the existence of the <stdbool.h> header.
1583 AC_CHECK_HEADERS(stdbool.h)
1585 CXXFLAGS="$ac_save_CXXFLAGS"
1590 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1591 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1593 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1595 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1596 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1597 if test -r /dev/random && test -r /dev/urandom; then
1598 glibcxx_cv_random_tr1=yes;
1600 glibcxx_cv_random_tr1=no;
1603 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1605 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1606 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1607 [Define if /dev/random and /dev/urandom are available for
1608 the random_device of TR1 (Chapter 5.1).])
1614 dnl Check whether EOF, SEEK_CUR, and SEEK_END have the most common values:
1615 dnl in that case including <cstdio> in some C++ headers can be avoided.
1617 AC_DEFUN([GLIBCXX_CHECK_STDIO_MACROS], [
1619 AC_MSG_CHECKING([for EOF == -1, SEEK_CUR == 1, SEEK_END == 2])
1620 AC_CACHE_VAL(glibcxx_cv_stdio_macros, [
1621 AC_TRY_COMPILE([#include <stdio.h>],
1622 [#if ((EOF != -1) || (SEEK_CUR != 1) || (SEEK_END != 2))
1625 ], [glibcxx_cv_stdio_macros=yes],
1626 [glibcxx_cv_stdio_macros=no])
1628 AC_MSG_RESULT($glibcxx_cv_stdio_macros)
1629 if test x"$glibcxx_cv_stdio_macros" = x"yes"; then
1630 AC_DEFINE(_GLIBCXX_STDIO_MACROS, 1,
1631 [Define if EOF == -1, SEEK_CUR == 1, SEEK_END == 2.])
1637 dnl Check whether macros, etc are present for <system_error>
1639 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1641 m4_pushdef([n_syserr], [1])dnl
1642 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1643 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1644 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1645 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1646 AC_MSG_CHECKING([for syserr])
1647 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1648 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1649 [int i = syserr;])],
1650 [glibcxx_cv_system_error[]n_syserr=yes],
1651 [glibcxx_cv_system_error[]n_syserr=no])
1653 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1654 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1655 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1657 m4_define([n_syserr], m4_incr(n_syserr))dnl
1658 m4_popdef([SYSERR])dnl
1660 m4_popdef([n_syserr])dnl
1664 dnl Check for what type of C headers to use.
1666 dnl --enable-cheaders= [does stuff].
1667 dnl --disable-cheaders [does not do anything, really].
1668 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1669 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1671 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1672 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1673 [construct "C" headers for g++], [permit c|c_std|c_global])
1674 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1676 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1678 # Allow overrides to configure.host here.
1679 if test $enable_cheaders = c_global; then
1683 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1687 AC_SUBST(C_INCLUDE_DIR)
1688 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1689 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1690 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1691 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1692 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1697 dnl Check for which locale library to use. The choice is mapped to
1698 dnl a subdirectory of config/locale.
1700 dnl Default is generic.
1702 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1703 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1704 [use MODEL for target locale package],
1705 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1707 # Deal with gettext issues. Default to not using it (=no) until we detect
1708 # support for it later. Let the user turn it off via --e/d, but let that
1709 # default to on for easier handling.
1712 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1716 # Either a known packaage, or "auto"
1717 if test $enable_clocale = no || test $enable_clocale = yes; then
1720 enable_clocale_flag=$enable_clocale
1722 # Probe for locale model to use if none specified.
1723 # Default to "generic".
1724 if test $enable_clocale_flag = auto; then
1725 case ${target_os} in
1726 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1727 enable_clocale_flag=gnu
1730 enable_clocale_flag=darwin
1733 enable_clocale_flag=generic
1738 # Sanity check model, and test for special functionality.
1739 if test $enable_clocale_flag = gnu; then
1740 AC_EGREP_CPP([_GLIBCXX_ok], [
1741 #include <features.h>
1742 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1745 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1747 if test $enable_clocale = auto; then
1748 # Test for bugs early in glibc-2.2.x series
1750 #define _GNU_SOURCE 1
1753 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1754 extern __typeof(newlocale) __newlocale;
1755 extern __typeof(duplocale) __duplocale;
1756 extern __typeof(strcoll_l) __strcoll_l;
1760 const char __one[] = "Äuglein Augmen";
1761 const char __two[] = "Äuglein";
1766 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1767 loc_dup = __duplocale(loc);
1768 i = __strcoll_l(__one, __two, loc);
1769 j = __strcoll_l(__one, __two, loc_dup);
1773 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1774 [enable_clocale_flag=generic])
1777 # Set it to scream when it hurts.
1778 ac_save_CFLAGS="$CFLAGS"
1779 CFLAGS="-Wimplicit-function-declaration -Werror"
1781 # Use strxfrm_l if available.
1782 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1784 #include <locale.h>],
1785 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1786 AC_DEFINE(HAVE_STRXFRM_L, 1,
1787 [Define if strxfrm_l is available in <string.h>.]),)
1789 # Use strerror_l if available.
1790 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1792 #include <locale.h>],
1793 [__locale_t loc; strerror_l(5, loc);],
1794 AC_DEFINE(HAVE_STRERROR_L, 1,
1795 [Define if strerror_l is available in <string.h>.]),)
1797 CFLAGS="$ac_save_CFLAGS"
1800 # Perhaps use strerror_r if available, and strerror_l isn't.
1801 ac_save_CFLAGS="$CFLAGS"
1802 CFLAGS="-Wimplicit-function-declaration -Werror"
1803 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1805 #include <locale.h>],
1806 [char s[128]; strerror_r(5, s, 128);],
1807 AC_DEFINE(HAVE_STRERROR_R, 1,
1808 [Define if strerror_r is available in <string.h>.]),)
1809 CFLAGS="$ac_save_CFLAGS"
1811 # Set configure bits for specified locale package
1812 AC_MSG_CHECKING([for C locale to use])
1813 case ${enable_clocale_flag} in
1815 AC_MSG_RESULT(generic)
1817 CLOCALE_H=config/locale/generic/c_locale.h
1818 CLOCALE_CC=config/locale/generic/c_locale.cc
1819 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1820 CCOLLATE_CC=config/locale/generic/collate_members.cc
1821 CCTYPE_CC=config/locale/generic/ctype_members.cc
1822 CMESSAGES_H=config/locale/generic/messages_members.h
1823 CMESSAGES_CC=config/locale/generic/messages_members.cc
1824 CMONEY_CC=config/locale/generic/monetary_members.cc
1825 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1826 CTIME_H=config/locale/generic/time_members.h
1827 CTIME_CC=config/locale/generic/time_members.cc
1828 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1831 AC_MSG_RESULT(darwin or freebsd)
1833 CLOCALE_H=config/locale/generic/c_locale.h
1834 CLOCALE_CC=config/locale/generic/c_locale.cc
1835 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1836 CCOLLATE_CC=config/locale/generic/collate_members.cc
1837 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1838 CMESSAGES_H=config/locale/generic/messages_members.h
1839 CMESSAGES_CC=config/locale/generic/messages_members.cc
1840 CMONEY_CC=config/locale/generic/monetary_members.cc
1841 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1842 CTIME_H=config/locale/generic/time_members.h
1843 CTIME_CC=config/locale/generic/time_members.cc
1844 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1850 # Declare intention to use gettext, and add support for specific
1852 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1855 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1856 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1857 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1860 # Export the build objects.
1861 for ling in $ALL_LINGUAS; do \
1862 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1863 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1865 AC_SUBST(glibcxx_MOFILES)
1866 AC_SUBST(glibcxx_POFILES)
1868 CLOCALE_H=config/locale/gnu/c_locale.h
1869 CLOCALE_CC=config/locale/gnu/c_locale.cc
1870 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1871 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1872 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1873 CMESSAGES_H=config/locale/gnu/messages_members.h
1874 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1875 CMONEY_CC=config/locale/gnu/monetary_members.cc
1876 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1877 CTIME_H=config/locale/gnu/time_members.h
1878 CTIME_CC=config/locale/gnu/time_members.cc
1879 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1882 AC_MSG_RESULT(IEEE 1003.1)
1884 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1885 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1886 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1887 CCOLLATE_CC=config/locale/generic/collate_members.cc
1888 CCTYPE_CC=config/locale/generic/ctype_members.cc
1889 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1890 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1891 CMONEY_CC=config/locale/generic/monetary_members.cc
1892 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1893 CTIME_H=config/locale/generic/time_members.h
1894 CTIME_CC=config/locale/generic/time_members.cc
1895 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1899 # This is where the testsuite looks for locale catalogs, using the
1900 # -DLOCALEDIR define during testsuite compilation.
1901 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1902 AC_SUBST(glibcxx_localedir)
1904 # A standalone libintl (e.g., GNU libintl) may be in use.
1905 if test $USE_NLS = yes; then
1906 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1907 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1909 if test $USE_NLS = yes; then
1910 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1911 [Define if NLS translations are to be used.])
1916 AC_SUBST(CMESSAGES_H)
1917 AC_SUBST(CCODECVT_CC)
1918 AC_SUBST(CCOLLATE_CC)
1920 AC_SUBST(CMESSAGES_CC)
1922 AC_SUBST(CNUMERIC_CC)
1925 AC_SUBST(CLOCALE_CC)
1926 AC_SUBST(CLOCALE_INTERNAL_H)
1931 dnl Check for which std::allocator base class to use. The choice is
1932 dnl mapped from a subdirectory of include/ext.
1936 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1937 AC_MSG_CHECKING([for std::allocator base class])
1938 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1939 [use KIND for target std::allocator base],
1940 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1942 # If they didn't use this option switch, or if they specified --enable
1943 # with no specific model, we'll have to look for one. If they
1944 # specified --disable (???), do likewise.
1945 if test $enable_libstdcxx_allocator = no ||
1946 test $enable_libstdcxx_allocator = yes;
1948 enable_libstdcxx_allocator=auto
1951 # Either a known package, or "auto". Auto implies the default choice
1952 # for a particular platform.
1953 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1955 # Probe for host-specific support if no specific model is specified.
1957 if test $enable_libstdcxx_allocator_flag = auto; then
1958 case ${target_os} in
1959 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1960 enable_libstdcxx_allocator_flag=new
1963 enable_libstdcxx_allocator_flag=new
1967 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1970 # Set configure bits for specified locale package
1971 case ${enable_libstdcxx_allocator_flag} in
1973 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1974 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1977 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1978 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1981 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1982 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1985 ALLOCATOR_H=config/allocator/new_allocator_base.h
1986 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1989 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1990 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1994 AC_SUBST(ALLOCATOR_H)
1995 AC_SUBST(ALLOCATOR_NAME)
2000 dnl Check for whether the Boost-derived checks should be turned on.
2002 dnl --enable-concept-checks turns them on.
2003 dnl --disable-concept-checks leaves them off.
2004 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2005 dnl Where DEFAULT is either `yes' or `no'.
2007 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2008 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2009 if test $enable_concept_checks = yes; then
2010 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2011 [Define to use concept checking code from the boost libraries.])
2016 dnl Check for parallel mode pre-requisites, including OpenMP support.
2018 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2020 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2024 # See if configured libgomp/omp.h exists. (libgomp may be in
2025 # noconfigdirs but not explicitly disabled.)
2026 if test -f $glibcxx_builddir/../libgomp/omp.h; then
2027 enable_parallel=yes;
2029 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
2032 AC_MSG_CHECKING([for parallel mode support])
2033 AC_MSG_RESULT([$enable_parallel])
2034 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
2039 dnl Check for which I/O library to use: stdio, or something specific.
2041 dnl Default is stdio.
2043 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2044 AC_MSG_CHECKING([for underlying I/O to use])
2045 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
2046 [use target-specific I/O package], [permit stdio])
2048 # Now that libio has been removed, you can have any color you want as long
2049 # as it's black. This is one big no-op until other packages are added, but
2050 # showing the framework never hurts.
2051 case ${enable_cstdio} in
2053 CSTDIO_H=config/io/c_io_stdio.h
2054 BASIC_FILE_H=config/io/basic_file_stdio.h
2055 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2056 AC_MSG_RESULT(stdio)
2061 AC_SUBST(BASIC_FILE_H)
2062 AC_SUBST(BASIC_FILE_CC)
2067 dnl Check for "unusual" flags to pass to the compiler while building.
2069 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2070 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2071 dnl --disable-cxx-flags passes nothing.
2072 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2073 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2074 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2075 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2076 dnl If "default flags" is an empty string, the effect is the same
2077 dnl as --disable or --enable=no.
2079 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2080 AC_MSG_CHECKING([for extra compiler flags for building])
2081 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2082 [pass compiler FLAGS when building library],
2083 [case "x$enable_cxx_flags" in
2084 xno | x) enable_cxx_flags= ;;
2086 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2089 # Run through flags (either default or command-line) and set anything
2090 # extra (e.g., #defines) that must accompany particular g++ options.
2091 if test -n "$enable_cxx_flags"; then
2092 for f in $enable_cxx_flags; do
2096 *) # and we're trying to pass /what/ exactly?
2097 AC_MSG_ERROR([compiler flags start with a -]) ;;
2102 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2103 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2104 AC_SUBST(EXTRA_CXX_FLAGS)
2109 dnl Check to see if debugging libraries are to be built.
2111 dnl --enable-libstdcxx-debug
2112 dnl builds a separate set of debugging libraries in addition to the
2113 dnl normal (shared, static) libstdc++ binaries.
2115 dnl --disable-libstdcxx-debug
2116 dnl builds only one (non-debug) version of libstdc++.
2118 dnl --enable-libstdcxx-debug-flags=FLAGS
2119 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2121 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2122 dnl Where DEFAULT is either `yes' or `no'.
2124 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2125 AC_MSG_CHECKING([for additional debug build])
2126 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2127 AC_MSG_RESULT($enable_libstdcxx_debug)
2128 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2133 dnl Check for explicit debug flags.
2135 dnl --enable-libstdcxx-debug-flags='-O1'
2136 dnl is a general method for passing flags to be used when
2137 dnl building debug libraries with --enable-debug.
2139 dnl --disable-libstdcxx-debug-flags does nothing.
2140 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2141 dnl If "default flags" is an empty string, the effect is the same
2142 dnl as --disable or --enable=no.
2144 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2145 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2146 [pass compiler FLAGS when building debug library],
2147 [case "x$enable_libstdcxx_debug_flags" in
2148 xno | x) enable_libstdcxx_debug_flags= ;;
2150 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2153 # Option parsed, now set things appropriately
2154 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2155 AC_SUBST(DEBUG_FLAGS)
2157 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2162 dnl Check if the user only wants a freestanding library implementation.
2164 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2165 dnl installing only the headers required by [17.4.1.3] and the language
2166 dnl support library. More than that will be built (to keep the Makefiles
2167 dnl conveniently clean), but not installed.
2170 dnl is_hosted (yes/no)
2173 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2175 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2176 AC_ARG_ENABLE([hosted-libstdcxx],
2177 AC_HELP_STRING([--disable-hosted-libstdcxx],
2178 [only build freestanding C++ runtime support]),,
2181 enable_hosted_libstdcxx=no
2184 enable_hosted_libstdcxx=yes
2187 if test "$enable_hosted_libstdcxx" = no; then
2188 AC_MSG_NOTICE([Only freestanding libraries will be built])
2192 enable_libstdcxx_pch=no
2197 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2198 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2199 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2204 dnl Check for template specializations for the 'long long' type.
2205 dnl The result determines only whether 'long long' I/O is enabled; things
2206 dnl like numeric_limits<> specializations are always available.
2208 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2209 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2210 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2211 dnl Where DEFAULT is either `yes' or `no'.
2213 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2214 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2215 if test $enable_long_long = yes; then
2216 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2217 [Define if code specialized for long long should be used.])
2219 AC_MSG_CHECKING([for enabled long long specializations])
2220 AC_MSG_RESULT([$enable_long_long])
2225 dnl Check for template specializations for the 'wchar_t' type.
2227 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2228 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2229 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2230 dnl Where DEFAULT is either `yes' or `no'.
2232 dnl Necessary support must also be present.
2234 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2235 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2237 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2238 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2239 AC_MSG_CHECKING([for mbstate_t])
2240 AC_TRY_COMPILE([#include <wchar.h>],
2241 [mbstate_t teststate;],
2242 have_mbstate_t=yes, have_mbstate_t=no)
2243 AC_MSG_RESULT($have_mbstate_t)
2244 if test x"$have_mbstate_t" = xyes; then
2245 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2248 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2250 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2252 if test x"$enable_wchar_t" = x"yes"; then
2257 if test x"$ac_has_wchar_h" = xyes &&
2258 test x"$ac_has_wctype_h" = xyes; then
2259 AC_TRY_COMPILE([#include <wchar.h>
2320 ],[],[], [enable_wchar_t=no])
2328 if test x"$enable_wchar_t" = x"yes"; then
2329 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2330 [Define if code specialized for wchar_t should be used.])
2333 AC_MSG_CHECKING([for enabled wchar_t specializations])
2334 AC_MSG_RESULT([$enable_wchar_t])
2339 dnl Check to see if building and using a C++ precompiled header can be done.
2341 dnl --enable-libstdcxx-pch=yes
2342 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2343 dnl may work, after some light-hearted attempts to puzzle out compiler
2344 dnl support, flip bits on in include/Makefile.am
2346 dnl --disable-libstdcxx-pch
2347 dnl turns off attempts to use or build stdc++.h.gch.
2350 dnl glibcxx_PCHFLAGS
2352 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2353 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2354 if test $enable_libstdcxx_pch = yes; then
2355 AC_CACHE_CHECK([for compiler with PCH support],
2356 [glibcxx_cv_prog_CXX_pch],
2357 [ac_save_CXXFLAGS="$CXXFLAGS"
2358 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2361 echo '#include <math.h>' > conftest.h
2362 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2363 -o conftest.h.gch 1>&5 2>&1 &&
2364 echo '#error "pch failed"' > conftest.h &&
2365 echo '#include "conftest.h"' > conftest.cc &&
2366 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2368 glibcxx_cv_prog_CXX_pch=yes
2370 glibcxx_cv_prog_CXX_pch=no
2373 CXXFLAGS=$ac_save_CXXFLAGS
2376 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2379 AC_MSG_CHECKING([for enabled PCH])
2380 AC_MSG_RESULT([$enable_libstdcxx_pch])
2382 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2383 if test $enable_libstdcxx_pch = yes; then
2384 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2388 AC_SUBST(glibcxx_PCHFLAGS)
2393 dnl Check for atomic builtins.
2395 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2397 dnl This checks to see if the host supports the compiler-generated
2398 dnl builtins for atomic operations for various integral sizes. Note, this
2399 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2400 dnl that are used should be checked.
2403 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2404 dnl see: CHECK_SYNC_FETCH_AND_ADD
2407 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2408 dnl _GLIBCXX_ATOMIC_BUILTINS_2
2409 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2410 dnl _GLIBCXX_ATOMIC_BUILTINS_8
2412 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2415 old_CXXFLAGS="$CXXFLAGS"
2417 # Compile unoptimized.
2420 # Fake what AC_TRY_COMPILE does, without linking as this is
2421 # unnecessary for a builtins test.
2423 cat > conftest.$ac_ext << EOF
2424 [#]line __oline__ "configure"
2427 typedef bool atomic_type;
2430 const atomic_type c3(0);
2431 __sync_fetch_and_add(&c1, c2);
2432 __sync_val_compare_and_swap(&c1, c3, c2);
2433 __sync_lock_test_and_set(&c1, c3);
2434 __sync_lock_release(&c1);
2435 __sync_synchronize();
2440 AC_MSG_CHECKING([for atomic builtins for bool])
2441 if AC_TRY_EVAL(ac_compile); then
2442 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2443 enable_atomic_builtinsb=no
2445 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2446 [Define if builtin atomic operations for bool are supported on this host.])
2447 enable_atomic_builtinsb=yes
2450 AC_MSG_RESULT($enable_atomic_builtinsb)
2453 cat > conftest.$ac_ext << EOF
2454 [#]line __oline__ "configure"
2457 typedef short atomic_type;
2460 const atomic_type c3(0);
2461 __sync_fetch_and_add(&c1, c2);
2462 __sync_val_compare_and_swap(&c1, c3, c2);
2463 __sync_lock_test_and_set(&c1, c3);
2464 __sync_lock_release(&c1);
2465 __sync_synchronize();
2470 AC_MSG_CHECKING([for atomic builtins for short])
2471 if AC_TRY_EVAL(ac_compile); then
2472 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2473 enable_atomic_builtinss=no
2475 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
2476 [Define if builtin atomic operations for short are supported on this host.])
2477 enable_atomic_builtinss=yes
2480 AC_MSG_RESULT($enable_atomic_builtinss)
2483 cat > conftest.$ac_ext << EOF
2484 [#]line __oline__ "configure"
2487 // NB: _Atomic_word not necessarily int.
2488 typedef int atomic_type;
2491 const atomic_type c3(0);
2492 __sync_fetch_and_add(&c1, c2);
2493 __sync_val_compare_and_swap(&c1, c3, c2);
2494 __sync_lock_test_and_set(&c1, c3);
2495 __sync_lock_release(&c1);
2496 __sync_synchronize();
2501 AC_MSG_CHECKING([for atomic builtins for int])
2502 if AC_TRY_EVAL(ac_compile); then
2503 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2504 enable_atomic_builtinsi=no
2506 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2507 [Define if builtin atomic operations for int are supported on this host.])
2508 enable_atomic_builtinsi=yes
2511 AC_MSG_RESULT($enable_atomic_builtinsi)
2514 cat > conftest.$ac_ext << EOF
2515 [#]line __oline__ "configure"
2518 typedef long long atomic_type;
2521 const atomic_type c3(0);
2522 __sync_fetch_and_add(&c1, c2);
2523 __sync_val_compare_and_swap(&c1, c3, c2);
2524 __sync_lock_test_and_set(&c1, c3);
2525 __sync_lock_release(&c1);
2526 __sync_synchronize();
2531 AC_MSG_CHECKING([for atomic builtins for long long])
2532 if AC_TRY_EVAL(ac_compile); then
2533 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2534 enable_atomic_builtinsll=no
2536 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
2537 [Define if builtin atomic operations for long long are supported on this host.])
2538 enable_atomic_builtinsll=yes
2541 AC_MSG_RESULT($enable_atomic_builtinsll)
2545 CXXFLAGS="$old_CXXFLAGS"
2548 # Set atomicity_dir to builtins if either of above tests pass.
2549 if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
2550 atomicity_dir=cpu/generic/atomicity_builtins
2553 # If still generic, set to mutex.
2554 if test $atomicity_dir = "cpu/generic" ; then
2555 atomicity_dir=cpu/generic/atomicity_mutex
2556 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2557 if test "x$target_thread_file" = xsingle; then
2558 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2559 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2561 AC_MSG_WARN([They will be faked using a mutex.])
2562 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2570 dnl Check for exception handling support. If an explicit enable/disable
2571 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2572 dnl target may or may not support call frame exceptions.
2574 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2575 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2576 dnl Neither one forces an attempt at detection.
2579 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2581 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2582 AC_MSG_CHECKING([for exception model to use])
2585 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2586 [force use of builtin_setjmp for exceptions],
2587 [permit yes|no|auto])
2589 if test $enable_sjlj_exceptions = auto; then
2590 # Botheration. Now we've got to detect the exception model. Link tests
2591 # against libgcc.a are problematic since we've not been given proper -L
2592 # bits for single-tree newlib and libgloss.
2594 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2595 cat > conftest.$ac_ext << EOF
2596 [#]line __oline__ "configure"
2605 old_CXXFLAGS="$CXXFLAGS"
2607 if AC_TRY_EVAL(ac_compile); then
2608 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2609 enable_sjlj_exceptions=yes
2610 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2611 enable_sjlj_exceptions=no
2612 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2613 enable_sjlj_exceptions=no
2616 CXXFLAGS="$old_CXXFLAGS"
2620 # This is a tad weird, for hysterical raisins. We have to map
2621 # enable/disable to two different models.
2622 case $enable_sjlj_exceptions in
2624 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2625 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2626 ac_exception_model_name=sjlj
2629 ac_exception_model_name="call frame"
2632 AC_MSG_ERROR([unable to detect exception model])
2636 AC_MSG_RESULT($ac_exception_model_name)
2641 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2643 dnl --enable-visibility enables attempt to use visibility attributes.
2644 dnl --disable-visibility turns off all use of visibility attributes.
2645 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2646 dnl Where DEFAULT is 'yes'.
2648 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2649 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2651 if test x$enable_visibility = xyes ; then
2652 dnl all hail libgfortran
2653 dnl Check whether the target supports hidden visibility.
2654 AC_CACHE_CHECK([whether the target supports hidden visibility],
2655 glibcxx_cv_have_attribute_visibility, [
2656 save_CFLAGS="$CFLAGS"
2657 CFLAGS="$CFLAGS -Werror"
2658 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2659 [], glibcxx_cv_have_attribute_visibility=yes,
2660 glibcxx_cv_have_attribute_visibility=no)
2661 CFLAGS="$save_CFLAGS"])
2662 if test $glibcxx_cv_have_attribute_visibility = no; then
2663 enable_visibility=no
2667 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2668 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2673 dnl Add version tags to symbols in shared library (or not), additionally
2674 dnl marking other symbols as private/local (or not).
2676 dnl --enable-symvers=style adds a version script to the linker call when
2677 dnl creating the shared library. The choice of version script is
2678 dnl controlled by 'style'.
2679 dnl --disable-symvers does not.
2680 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2681 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2682 dnl choose a default style based on linker characteristics. Passing
2683 dnl 'no' disables versioning.
2685 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2687 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2688 [enables symbol versioning of the shared library],
2689 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2691 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2692 # don't know enough about $LD to do tricks...
2693 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2695 # Turn a 'yes' into a suitable default.
2696 if test x$enable_symvers = xyes ; then
2697 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2700 if test $with_gnu_ld = yes ; then
2701 case ${target_os} in
2702 cygwin* | pe | mingw32* | hpux*)
2703 enable_symvers=no ;;
2705 enable_symvers=gnu ;;
2708 case ${target_os} in
2710 enable_symvers=darwin ;;
2712 enable_symvers=no ;;
2718 # Check to see if 'darwin' or 'darwin-export' can win.
2719 if test x$enable_symvers = xdarwin-export ; then
2720 enable_symvers=darwin
2723 # Check to see if 'gnu' can win.
2724 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2725 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2726 AC_MSG_CHECKING([for shared libgcc])
2727 ac_save_CFLAGS="$CFLAGS"
2729 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2730 CFLAGS="$ac_save_CFLAGS"
2731 if test $glibcxx_shared_libgcc = no; then
2732 cat > conftest.c <<EOF
2733 int main (void) { return 0; }
2736 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2737 -shared -shared-libgcc -o conftest.so \
2738 conftest.c -v 2>&1 >/dev/null \
2739 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2741 rm -f conftest.c conftest.so
2742 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2743 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2744 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2745 CFLAGS="$ac_save_CFLAGS"
2748 AC_MSG_RESULT($glibcxx_shared_libgcc)
2750 # For GNU ld, we need at least this version. The format is described in
2751 # GLIBCXX_CHECK_LINKER_FEATURES above.
2752 glibcxx_min_gnu_ld_version=21400
2754 # If no shared libgcc, can't win.
2755 if test $glibcxx_shared_libgcc != yes; then
2756 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2757 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2758 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2760 elif test $with_gnu_ld != yes ; then
2762 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2763 AC_MSG_WARN([=== you are not using the GNU linker.])
2764 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2766 elif test $glibcxx_ld_is_gold = yes ; then
2767 : All versions of gold support symbol versioning.
2768 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2769 # The right tools, the right setup, but too old. Fallbacks?
2770 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2771 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2772 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2773 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2774 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2779 # Everything parsed; figure out what file to use.
2780 case $enable_symvers in
2782 SYMVER_FILE=config/abi/pre/none.ver
2785 SYMVER_FILE=config/abi/pre/gnu.ver
2786 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2787 [Define to use GNU versioning in the shared library.])
2789 gnu-versioned-namespace)
2790 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2791 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2792 [Define to use GNU namespace versioning in the shared library.])
2795 SYMVER_FILE=config/abi/pre/gnu.ver
2796 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2797 [Define to use darwin versioning in the shared library.])
2801 if test x$enable_symvers != xno ; then
2802 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2803 [Define to use symbol versioning in the shared library.])
2806 AC_CACHE_CHECK([whether the target supports .symver directive],
2807 glibcxx_cv_have_as_symver_directive, [
2808 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
2809 [], glibcxx_cv_have_as_symver_directive=yes,
2810 glibcxx_cv_have_as_symver_directive=no)])
2811 if test $glibcxx_cv_have_as_symver_directive = yes; then
2812 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
2813 [Define to 1 if the target assembler supports .symver directive.])
2816 AC_SUBST(SYMVER_FILE)
2817 AC_SUBST(port_specific_symbol_files)
2818 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2819 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2820 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2821 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2822 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2824 # Now, set up compatibility support, if any.
2825 # In addition, need this to deal with std::size_t mangling in
2826 # src/compatibility.cc. In a perfect world, could use
2827 # typeid(std::size_t).name()[0] to do direct substitution.
2828 AC_MSG_CHECKING([for size_t as unsigned int])
2829 ac_save_CFLAGS="$CFLAGS"
2831 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2832 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2833 CFLAGS=$ac_save_CFLAGS
2834 if test "$glibcxx_size_t_is_i" = yes; then
2835 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2837 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2839 AC_MSG_CHECKING([for ptrdiff_t as int])
2840 ac_save_CFLAGS="$CFLAGS"
2842 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2843 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2844 CFLAGS=$ac_save_CFLAGS
2845 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2846 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2848 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2853 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2854 dnl We must stage the required headers so that they will be installed
2855 dnl with the library (unlike libgcc, the STL implementation is provided
2856 dnl solely within headers). Since we must not inject random user-space
2857 dnl macro names into user-provided C++ code, we first stage into <file>-in
2858 dnl and process to <file> with an output command. The reason for a two-
2859 dnl stage process here is to correctly handle $srcdir!=$objdir without
2860 dnl having to write complex code (the sed commands to clean the macro
2861 dnl namespace are complex and fragile enough as it is). We must also
2862 dnl add a relative path so that -I- is supported properly.
2865 dnl glibcxx_thread_h
2868 dnl HAVE_GTHR_DEFAULT
2870 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2871 AC_MSG_CHECKING([for thread model used by GCC])
2872 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2873 AC_MSG_RESULT([$target_thread_file])
2875 if test $target_thread_file != single; then
2876 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2877 [Define if gthr-default.h exists
2878 (meaning that threading support is enabled).])
2881 glibcxx_thread_h=gthr-$target_thread_file.h
2883 dnl Check for __GTHREADS define.
2884 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2885 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2891 AC_SUBST(glibcxx_thread_h)
2896 dnl Check if gthread implementation defines the types and functions
2897 dnl required by the c++0x thread library. Conforming gthread
2898 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
2900 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
2904 ac_save_CXXFLAGS="$CXXFLAGS"
2905 CXXFLAGS="$CXXFLAGS -fno-exceptions -I${toplevel_srcdir}/gcc"
2907 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2908 case $target_thread_file in
2910 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
2913 AC_MSG_CHECKING([for gthreads library])
2915 AC_TRY_COMPILE([#include "gthr.h"],
2917 #ifndef __GTHREADS_CXX0X
2921 // In case of POSIX threads check _POSIX_TIMEOUTS too.
2922 #if (defined(_PTHREADS) \
2923 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
2926 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
2928 AC_MSG_RESULT([$ac_has_gthreads])
2930 if test x"$ac_has_gthreads" = x"yes"; then
2931 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
2932 [Define if gthreads library is available.])
2935 CXXFLAGS="$ac_save_CXXFLAGS"
2940 # Check whether LC_MESSAGES is available in <locale.h>.
2941 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2943 # This file file be copied and used freely without restrictions. It can
2944 # be used in projects which are not available under the GNU Public License
2945 # but which still want to provide support for the GNU gettext functionality.
2946 # Please note that the actual code is *not* freely available.
2947 AC_DEFUN([AC_LC_MESSAGES], [
2948 AC_CHECK_HEADER(locale.h, [
2949 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2950 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
2951 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2952 if test $ac_cv_val_LC_MESSAGES = yes; then
2953 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2954 [Define if LC_MESSAGES is available in <locale.h>.])
2959 # Macros from the top-level gcc directory.
2960 m4_include([../config/tls.m4])