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 |
213 sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'`
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
1080 AC_MSG_RESULT($enable_libstdcxx_time)
1082 if test x"$enable_libstdcxx_time" != x"no"; then
1084 if test x"$enable_libstdcxx_time" = x"rt"; then
1085 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1086 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1088 AC_SEARCH_LIBS(clock_gettime, [posix4])
1089 AC_SEARCH_LIBS(nanosleep, [posix4])
1092 case "$ac_cv_search_clock_gettime" in
1093 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1096 case "$ac_cv_search_nanosleep" in
1097 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1101 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1103 case "$ac_cv_search_sched_yield" in
1105 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1106 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1107 [ Defined if sched_yield is available. ])
1110 if test x"$enable_libstdcxx_time" = x"rt"; then
1111 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1112 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1113 [ Defined if sched_yield is available. ])
1117 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1118 [ Defined if sched_yield is available. ])
1122 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1124 if test x"$ac_has_unistd_h" = x"yes"; then
1125 AC_MSG_CHECKING([for monotonic clock])
1127 [#include <unistd.h>
1130 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1133 clock_gettime(CLOCK_MONOTONIC, &tp);
1134 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1136 AC_MSG_RESULT($ac_has_clock_monotonic)
1138 AC_MSG_CHECKING([for realtime clock])
1140 [#include <unistd.h>
1143 [#if _POSIX_TIMERS > 0
1146 clock_gettime(CLOCK_REALTIME, &tp);
1147 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1149 AC_MSG_RESULT($ac_has_clock_realtime)
1151 AC_MSG_CHECKING([for nanosleep])
1153 [#include <unistd.h>
1156 [#if _POSIX_TIMERS > 0
1160 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1162 AC_MSG_RESULT($ac_has_nanosleep)
1166 if test x"$ac_has_clock_monotonic" = x"yes"; then
1167 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1168 [ Defined if clock_gettime has monotonic clock support. ])
1171 if test x"$ac_has_clock_realtime" = x"yes"; then
1172 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1173 [ Defined if clock_gettime has realtime clock support. ])
1176 if test x"$ac_has_nanosleep" = x"yes"; then
1177 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1178 [ Defined if nanosleep is available. ])
1181 AC_SUBST(GLIBCXX_LIBS)
1183 CXXFLAGS="$ac_save_CXXFLAGS"
1184 LIBS="$ac_save_LIBS"
1189 dnl Check for gettimeofday, used in the implementation of 20.8.5
1190 dnl [time.clock] in the current C++0x working draft.
1192 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1194 AC_MSG_CHECKING([for gettimeofday])
1198 ac_save_CXXFLAGS="$CXXFLAGS"
1199 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1201 ac_has_gettimeofday=no;
1202 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1203 if test x"$ac_has_sys_time_h" = x"yes"; then
1204 AC_MSG_CHECKING([for gettimeofday])
1205 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1206 [timeval tv; gettimeofday(&tv, 0);],
1207 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1209 AC_MSG_RESULT($ac_has_gettimeofday)
1212 if test x"$ac_has_gettimeofday" = x"yes"; then
1213 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1214 [ Defined if gettimeofday is available. ])
1217 CXXFLAGS="$ac_save_CXXFLAGS"
1222 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1223 dnl facilities in Chapter 8, "C compatibility".
1225 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1230 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1231 # undefined and fake C99 facilities may be spuriously enabled.
1232 ac_save_CXXFLAGS="$CXXFLAGS"
1233 CXXFLAGS="$CXXFLAGS -std=c++98"
1235 # Check for the existence of <complex.h> complex math functions used
1237 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1238 ac_c99_complex_tr1=no;
1239 if test x"$ac_has_complex_h" = x"yes"; then
1240 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1241 AC_TRY_COMPILE([#include <complex.h>],
1242 [typedef __complex__ float float_type; float_type tmpf;
1249 typedef __complex__ double double_type; double_type tmpd;
1256 typedef __complex__ long double ld_type; ld_type tmpld;
1263 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1265 AC_MSG_RESULT($ac_c99_complex_tr1)
1266 if test x"$ac_c99_complex_tr1" = x"yes"; then
1267 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1268 [Define if C99 functions in <complex.h> should be used in
1269 <tr1/complex>. Using compiler builtins for these functions
1270 requires corresponding C99 library functions to be present.])
1273 # Check for the existence of <ctype.h> functions.
1274 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1275 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1276 AC_TRY_COMPILE([#include <ctype.h>],
1280 ],[glibcxx_cv_c99_ctype_tr1=yes],
1281 [glibcxx_cv_c99_ctype_tr1=no])
1283 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1284 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1285 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1286 [Define if C99 functions in <ctype.h> should be imported in
1287 <tr1/cctype> in namespace std::tr1.])
1290 # Check for the existence of <fenv.h> functions.
1291 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1293 if test x"$ac_has_fenv_h" = x"yes"; then
1294 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1295 AC_TRY_COMPILE([#include <fenv.h>],
1300 ret = feclearexcept(except);
1301 ret = fegetexceptflag(pflag, except);
1302 ret = feraiseexcept(except);
1303 ret = fesetexceptflag(pflag, except);
1304 ret = fetestexcept(except);
1306 ret = fesetround(mode);
1307 ret = fegetenv(penv);
1308 ret = feholdexcept(penv);
1309 ret = fesetenv(penv);
1310 ret = feupdateenv(penv);
1311 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1313 AC_MSG_RESULT($ac_c99_fenv_tr1)
1314 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1315 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1316 [Define if C99 functions in <fenv.h> should be imported in
1317 <tr1/cfenv> in namespace std::tr1.])
1320 # Check for the existence of <stdint.h> types.
1321 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1322 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1323 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1324 #define __STDC_CONSTANT_MACROS
1325 #include <stdint.h>],
1326 [typedef int8_t my_int8_t;
1327 my_int8_t i8 = INT8_MIN;
1329 typedef int16_t my_int16_t;
1330 my_int16_t i16 = INT16_MIN;
1332 typedef int32_t my_int32_t;
1333 my_int32_t i32 = INT32_MIN;
1335 typedef int64_t my_int64_t;
1336 my_int64_t i64 = INT64_MIN;
1338 typedef int_fast8_t my_int_fast8_t;
1339 my_int_fast8_t if8 = INT_FAST8_MIN;
1340 if8 = INT_FAST8_MAX;
1341 typedef int_fast16_t my_int_fast16_t;
1342 my_int_fast16_t if16 = INT_FAST16_MIN;
1343 if16 = INT_FAST16_MAX;
1344 typedef int_fast32_t my_int_fast32_t;
1345 my_int_fast32_t if32 = INT_FAST32_MIN;
1346 if32 = INT_FAST32_MAX;
1347 typedef int_fast64_t my_int_fast64_t;
1348 my_int_fast64_t if64 = INT_FAST64_MIN;
1349 if64 = INT_FAST64_MAX;
1350 typedef int_least8_t my_int_least8_t;
1351 my_int_least8_t il8 = INT_LEAST8_MIN;
1352 il8 = INT_LEAST8_MAX;
1353 typedef int_least16_t my_int_least16_t;
1354 my_int_least16_t il16 = INT_LEAST16_MIN;
1355 il16 = INT_LEAST16_MAX;
1356 typedef int_least32_t my_int_least32_t;
1357 my_int_least32_t il32 = INT_LEAST32_MIN;
1358 il32 = INT_LEAST32_MAX;
1359 typedef int_least64_t my_int_least64_t;
1360 my_int_least64_t il64 = INT_LEAST64_MIN;
1361 il64 = INT_LEAST64_MAX;
1362 typedef intmax_t my_intmax_t;
1363 my_intmax_t im = INTMAX_MAX;
1365 typedef intptr_t my_intptr_t;
1366 my_intptr_t ip = INTPTR_MAX;
1368 typedef uint8_t my_uint8_t;
1369 my_uint8_t ui8 = UINT8_MAX;
1371 typedef uint16_t my_uint16_t;
1372 my_uint16_t ui16 = UINT16_MAX;
1374 typedef uint32_t my_uint32_t;
1375 my_uint32_t ui32 = UINT32_MAX;
1377 typedef uint64_t my_uint64_t;
1378 my_uint64_t ui64 = UINT64_MAX;
1380 typedef uint_fast8_t my_uint_fast8_t;
1381 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1382 uif8 = UINT_FAST8_MAX;
1383 typedef uint_fast16_t my_uint_fast16_t;
1384 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1385 uif16 = UINT_FAST16_MAX;
1386 typedef uint_fast32_t my_uint_fast32_t;
1387 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1388 uif32 = UINT_FAST32_MAX;
1389 typedef uint_fast64_t my_uint_fast64_t;
1390 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1391 uif64 = UINT_FAST64_MAX;
1392 typedef uint_least8_t my_uint_least8_t;
1393 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1394 uil8 = UINT_LEAST8_MAX;
1395 typedef uint_least16_t my_uint_least16_t;
1396 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1397 uil16 = UINT_LEAST16_MAX;
1398 typedef uint_least32_t my_uint_least32_t;
1399 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1400 uil32 = UINT_LEAST32_MAX;
1401 typedef uint_least64_t my_uint_least64_t;
1402 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1403 uil64 = UINT_LEAST64_MAX;
1404 typedef uintmax_t my_uintmax_t;
1405 my_uintmax_t uim = UINTMAX_MAX;
1407 typedef uintptr_t my_uintptr_t;
1408 my_uintptr_t uip = UINTPTR_MAX;
1410 ],[glibcxx_cv_c99_stdint_tr1=yes],
1411 [glibcxx_cv_c99_stdint_tr1=no])
1413 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1414 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1415 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1416 [Define if C99 types in <stdint.h> should be imported in
1417 <tr1/cstdint> in namespace std::tr1.])
1420 # Check for the existence of <math.h> functions.
1421 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1422 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1423 AC_TRY_COMPILE([#include <math.h>],
1424 [typedef double_t my_double_t;
1425 typedef float_t my_float_t;
1439 copysignf(0.0f, 0.0f);
1440 copysignl(0.0l, 0.0l);
1457 fmaf(0.0f, 0.0f, 0.0f);
1458 fmal(0.0l, 0.0l, 0.0l);
1501 nextafter(0.0, 0.0);
1502 nextafterf(0.0f, 0.0f);
1503 nextafterl(0.0l, 0.0l);
1504 nexttoward(0.0, 0.0);
1505 nexttowardf(0.0f, 0.0f);
1506 nexttowardl(0.0l, 0.0l);
1507 remainder(0.0, 0.0);
1508 remainderf(0.0f, 0.0f);
1509 remainderl(0.0l, 0.0l);
1510 remquo(0.0, 0.0, 0);
1511 remquof(0.0f, 0.0f, 0);
1512 remquol(0.0l, 0.0l, 0);
1531 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1533 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1534 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1535 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1536 [Define if C99 functions or macros in <math.h> should be imported
1537 in <tr1/cmath> in namespace std::tr1.])
1540 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1541 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1542 ac_c99_inttypes_tr1=no;
1543 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1544 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1545 AC_TRY_COMPILE([#include <inttypes.h>],
1546 [intmax_t i, numer, denom, base;
1549 intmax_t ret = imaxabs(i);
1550 imaxdiv_t dret = imaxdiv(numer, denom);
1551 ret = strtoimax(s, endptr, base);
1552 uintmax_t uret = strtoumax(s, endptr, base);
1553 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1555 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1556 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1557 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1558 [Define if C99 functions in <inttypes.h> should be imported in
1559 <tr1/cinttypes> in namespace std::tr1.])
1562 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't
1563 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1564 ac_c99_inttypes_wchar_t_tr1=no;
1565 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1566 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1567 AC_TRY_COMPILE([#include <inttypes.h>],
1571 intmax_t ret = wcstoimax(s, endptr, base);
1572 uintmax_t uret = wcstoumax(s, endptr, base);
1573 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1574 [ac_c99_inttypes_wchar_t_tr1=no])
1576 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1577 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1578 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1579 [Define if wchar_t C99 functions in <inttypes.h> should be
1580 imported in <tr1/cinttypes> in namespace std::tr1.])
1583 # Check for the existence of the <stdbool.h> header.
1584 AC_CHECK_HEADERS(stdbool.h)
1586 CXXFLAGS="$ac_save_CXXFLAGS"
1591 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1592 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1594 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1596 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1597 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1598 if test -r /dev/random && test -r /dev/urandom; then
1599 glibcxx_cv_random_tr1=yes;
1601 glibcxx_cv_random_tr1=no;
1604 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1606 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1607 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1608 [Define if /dev/random and /dev/urandom are available for
1609 the random_device of TR1 (Chapter 5.1).])
1615 dnl Check whether EOF, SEEK_CUR, and SEEK_END have the most common values:
1616 dnl in that case including <cstdio> in some C++ headers can be avoided.
1618 AC_DEFUN([GLIBCXX_CHECK_STDIO_MACROS], [
1620 AC_MSG_CHECKING([for EOF == -1, SEEK_CUR == 1, SEEK_END == 2])
1621 AC_CACHE_VAL(glibcxx_cv_stdio_macros, [
1622 AC_TRY_COMPILE([#include <stdio.h>],
1623 [#if ((EOF != -1) || (SEEK_CUR != 1) || (SEEK_END != 2))
1626 ], [glibcxx_cv_stdio_macros=yes],
1627 [glibcxx_cv_stdio_macros=no])
1629 AC_MSG_RESULT($glibcxx_cv_stdio_macros)
1630 if test x"$glibcxx_cv_stdio_macros" = x"yes"; then
1631 AC_DEFINE(_GLIBCXX_STDIO_MACROS, 1,
1632 [Define if EOF == -1, SEEK_CUR == 1, SEEK_END == 2.])
1638 dnl Check whether macros, etc are present for <system_error>
1640 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1642 m4_pushdef([n_syserr], [1])dnl
1643 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1644 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1645 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1646 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1647 AC_MSG_CHECKING([for syserr])
1648 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1649 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1650 [int i = syserr;])],
1651 [glibcxx_cv_system_error[]n_syserr=yes],
1652 [glibcxx_cv_system_error[]n_syserr=no])
1654 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1655 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1656 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1658 m4_define([n_syserr], m4_incr(n_syserr))dnl
1659 m4_popdef([SYSERR])dnl
1661 m4_popdef([n_syserr])dnl
1665 dnl Check for what type of C headers to use.
1667 dnl --enable-cheaders= [does stuff].
1668 dnl --disable-cheaders [does not do anything, really].
1669 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1670 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1672 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1673 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1674 [construct "C" headers for g++], [permit c|c_std|c_global])
1675 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1677 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1679 # Allow overrides to configure.host here.
1680 if test $enable_cheaders = c_global; then
1684 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1688 AC_SUBST(C_INCLUDE_DIR)
1689 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1690 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1691 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1692 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1693 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1698 dnl Check for which locale library to use. The choice is mapped to
1699 dnl a subdirectory of config/locale.
1701 dnl Default is generic.
1703 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1704 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1705 [use MODEL for target locale package],
1706 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1708 # Deal with gettext issues. Default to not using it (=no) until we detect
1709 # support for it later. Let the user turn it off via --e/d, but let that
1710 # default to on for easier handling.
1713 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1717 # Either a known packaage, or "auto"
1718 if test $enable_clocale = no || test $enable_clocale = yes; then
1721 enable_clocale_flag=$enable_clocale
1723 # Probe for locale model to use if none specified.
1724 # Default to "generic".
1725 if test $enable_clocale_flag = auto; then
1726 case ${target_os} in
1727 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1728 enable_clocale_flag=gnu
1731 enable_clocale_flag=darwin
1734 enable_clocale_flag=generic
1739 # Sanity check model, and test for special functionality.
1740 if test $enable_clocale_flag = gnu; then
1741 AC_EGREP_CPP([_GLIBCXX_ok], [
1742 #include <features.h>
1743 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
1746 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1748 # Set it to scream when it hurts.
1749 ac_save_CFLAGS="$CFLAGS"
1750 CFLAGS="-Wimplicit-function-declaration -Werror"
1752 # Use strxfrm_l if available.
1753 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1755 #include <locale.h>],
1756 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1757 AC_DEFINE(HAVE_STRXFRM_L, 1,
1758 [Define if strxfrm_l is available in <string.h>.]),)
1760 # Use strerror_l if available.
1761 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1763 #include <locale.h>],
1764 [__locale_t loc; strerror_l(5, loc);],
1765 AC_DEFINE(HAVE_STRERROR_L, 1,
1766 [Define if strerror_l is available in <string.h>.]),)
1768 CFLAGS="$ac_save_CFLAGS"
1771 # Perhaps use strerror_r if available, and strerror_l isn't.
1772 ac_save_CFLAGS="$CFLAGS"
1773 CFLAGS="-Wimplicit-function-declaration -Werror"
1774 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1776 #include <locale.h>],
1777 [char s[128]; strerror_r(5, s, 128);],
1778 AC_DEFINE(HAVE_STRERROR_R, 1,
1779 [Define if strerror_r is available in <string.h>.]),)
1780 CFLAGS="$ac_save_CFLAGS"
1782 # Set configure bits for specified locale package
1783 AC_MSG_CHECKING([for C locale to use])
1784 case ${enable_clocale_flag} in
1786 AC_MSG_RESULT(generic)
1788 CLOCALE_H=config/locale/generic/c_locale.h
1789 CLOCALE_CC=config/locale/generic/c_locale.cc
1790 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1791 CCOLLATE_CC=config/locale/generic/collate_members.cc
1792 CCTYPE_CC=config/locale/generic/ctype_members.cc
1793 CMESSAGES_H=config/locale/generic/messages_members.h
1794 CMESSAGES_CC=config/locale/generic/messages_members.cc
1795 CMONEY_CC=config/locale/generic/monetary_members.cc
1796 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1797 CTIME_H=config/locale/generic/time_members.h
1798 CTIME_CC=config/locale/generic/time_members.cc
1799 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1802 AC_MSG_RESULT(darwin or freebsd)
1804 CLOCALE_H=config/locale/generic/c_locale.h
1805 CLOCALE_CC=config/locale/generic/c_locale.cc
1806 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1807 CCOLLATE_CC=config/locale/generic/collate_members.cc
1808 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1809 CMESSAGES_H=config/locale/generic/messages_members.h
1810 CMESSAGES_CC=config/locale/generic/messages_members.cc
1811 CMONEY_CC=config/locale/generic/monetary_members.cc
1812 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1813 CTIME_H=config/locale/generic/time_members.h
1814 CTIME_CC=config/locale/generic/time_members.cc
1815 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1821 # Declare intention to use gettext, and add support for specific
1823 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1826 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1827 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1828 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1831 # Export the build objects.
1832 for ling in $ALL_LINGUAS; do \
1833 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1834 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1836 AC_SUBST(glibcxx_MOFILES)
1837 AC_SUBST(glibcxx_POFILES)
1839 CLOCALE_H=config/locale/gnu/c_locale.h
1840 CLOCALE_CC=config/locale/gnu/c_locale.cc
1841 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1842 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1843 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1844 CMESSAGES_H=config/locale/gnu/messages_members.h
1845 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1846 CMONEY_CC=config/locale/gnu/monetary_members.cc
1847 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1848 CTIME_H=config/locale/gnu/time_members.h
1849 CTIME_CC=config/locale/gnu/time_members.cc
1850 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1853 AC_MSG_RESULT(IEEE 1003.1)
1855 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1856 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1857 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1858 CCOLLATE_CC=config/locale/generic/collate_members.cc
1859 CCTYPE_CC=config/locale/generic/ctype_members.cc
1860 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1861 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1862 CMONEY_CC=config/locale/generic/monetary_members.cc
1863 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1864 CTIME_H=config/locale/generic/time_members.h
1865 CTIME_CC=config/locale/generic/time_members.cc
1866 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1870 # This is where the testsuite looks for locale catalogs, using the
1871 # -DLOCALEDIR define during testsuite compilation.
1872 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1873 AC_SUBST(glibcxx_localedir)
1875 # A standalone libintl (e.g., GNU libintl) may be in use.
1876 if test $USE_NLS = yes; then
1877 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1878 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1880 if test $USE_NLS = yes; then
1881 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1882 [Define if NLS translations are to be used.])
1887 AC_SUBST(CMESSAGES_H)
1888 AC_SUBST(CCODECVT_CC)
1889 AC_SUBST(CCOLLATE_CC)
1891 AC_SUBST(CMESSAGES_CC)
1893 AC_SUBST(CNUMERIC_CC)
1896 AC_SUBST(CLOCALE_CC)
1897 AC_SUBST(CLOCALE_INTERNAL_H)
1902 dnl Check for which std::allocator base class to use. The choice is
1903 dnl mapped from a subdirectory of include/ext.
1907 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1908 AC_MSG_CHECKING([for std::allocator base class])
1909 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1910 [use KIND for target std::allocator base],
1911 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1913 # If they didn't use this option switch, or if they specified --enable
1914 # with no specific model, we'll have to look for one. If they
1915 # specified --disable (???), do likewise.
1916 if test $enable_libstdcxx_allocator = no ||
1917 test $enable_libstdcxx_allocator = yes;
1919 enable_libstdcxx_allocator=auto
1922 # Either a known package, or "auto". Auto implies the default choice
1923 # for a particular platform.
1924 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1926 # Probe for host-specific support if no specific model is specified.
1928 if test $enable_libstdcxx_allocator_flag = auto; then
1929 case ${target_os} in
1930 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1931 enable_libstdcxx_allocator_flag=new
1934 enable_libstdcxx_allocator_flag=new
1938 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1941 # Set configure bits for specified locale package
1942 case ${enable_libstdcxx_allocator_flag} in
1944 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1945 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1948 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1949 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1952 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1953 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1956 ALLOCATOR_H=config/allocator/new_allocator_base.h
1957 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1960 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1961 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1965 AC_SUBST(ALLOCATOR_H)
1966 AC_SUBST(ALLOCATOR_NAME)
1971 dnl Check for whether the Boost-derived checks should be turned on.
1973 dnl --enable-concept-checks turns them on.
1974 dnl --disable-concept-checks leaves them off.
1975 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1976 dnl Where DEFAULT is either `yes' or `no'.
1978 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1979 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1980 if test $enable_concept_checks = yes; then
1981 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1982 [Define to use concept checking code from the boost libraries.])
1987 dnl Check for parallel mode pre-requisites, including OpenMP support.
1989 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1991 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1995 # See if configured libgomp/omp.h exists. (libgomp may be in
1996 # noconfigdirs but not explicitly disabled.)
1997 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
1998 enable_parallel=yes;
2000 AC_MSG_NOTICE([target-libgomp not built])
2003 AC_MSG_CHECKING([for parallel mode support])
2004 AC_MSG_RESULT([$enable_parallel])
2005 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
2010 dnl Check for which I/O library to use: stdio, or something specific.
2012 dnl Default is stdio.
2014 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2015 AC_MSG_CHECKING([for underlying I/O to use])
2016 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
2017 [use target-specific I/O package], [permit stdio])
2019 # Now that libio has been removed, you can have any color you want as long
2020 # as it's black. This is one big no-op until other packages are added, but
2021 # showing the framework never hurts.
2022 case ${enable_cstdio} in
2024 CSTDIO_H=config/io/c_io_stdio.h
2025 BASIC_FILE_H=config/io/basic_file_stdio.h
2026 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2027 AC_MSG_RESULT(stdio)
2032 AC_SUBST(BASIC_FILE_H)
2033 AC_SUBST(BASIC_FILE_CC)
2038 dnl Check for "unusual" flags to pass to the compiler while building.
2040 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2041 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2042 dnl --disable-cxx-flags passes nothing.
2043 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2044 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2045 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2046 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2047 dnl If "default flags" is an empty string, the effect is the same
2048 dnl as --disable or --enable=no.
2050 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2051 AC_MSG_CHECKING([for extra compiler flags for building])
2052 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2053 [pass compiler FLAGS when building library],
2054 [case "x$enable_cxx_flags" in
2055 xno | x) enable_cxx_flags= ;;
2057 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2060 # Run through flags (either default or command-line) and set anything
2061 # extra (e.g., #defines) that must accompany particular g++ options.
2062 if test -n "$enable_cxx_flags"; then
2063 for f in $enable_cxx_flags; do
2067 *) # and we're trying to pass /what/ exactly?
2068 AC_MSG_ERROR([compiler flags start with a -]) ;;
2073 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2074 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2075 AC_SUBST(EXTRA_CXX_FLAGS)
2080 dnl Check to see if debugging libraries are to be built.
2082 dnl --enable-libstdcxx-debug
2083 dnl builds a separate set of debugging libraries in addition to the
2084 dnl normal (shared, static) libstdc++ binaries.
2086 dnl --disable-libstdcxx-debug
2087 dnl builds only one (non-debug) version of libstdc++.
2089 dnl --enable-libstdcxx-debug-flags=FLAGS
2090 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2092 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2093 dnl Where DEFAULT is either `yes' or `no'.
2095 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2096 AC_MSG_CHECKING([for additional debug build])
2097 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2098 AC_MSG_RESULT($enable_libstdcxx_debug)
2099 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2104 dnl Check for explicit debug flags.
2106 dnl --enable-libstdcxx-debug-flags='-O1'
2107 dnl is a general method for passing flags to be used when
2108 dnl building debug libraries with --enable-debug.
2110 dnl --disable-libstdcxx-debug-flags does nothing.
2111 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2112 dnl If "default flags" is an empty string, the effect is the same
2113 dnl as --disable or --enable=no.
2115 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2116 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2117 [pass compiler FLAGS when building debug library],
2118 [case "x$enable_libstdcxx_debug_flags" in
2119 xno | x) enable_libstdcxx_debug_flags= ;;
2121 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2124 # Option parsed, now set things appropriately
2125 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2126 AC_SUBST(DEBUG_FLAGS)
2128 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2133 dnl Check if the user only wants a freestanding library implementation.
2135 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2136 dnl installing only the headers required by [17.4.1.3] and the language
2137 dnl support library. More than that will be built (to keep the Makefiles
2138 dnl conveniently clean), but not installed.
2141 dnl is_hosted (yes/no)
2144 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2146 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2147 AC_ARG_ENABLE([hosted-libstdcxx],
2148 AC_HELP_STRING([--disable-hosted-libstdcxx],
2149 [only build freestanding C++ runtime support]),,
2152 enable_hosted_libstdcxx=no
2155 enable_hosted_libstdcxx=yes
2158 if test "$enable_hosted_libstdcxx" = no; then
2159 AC_MSG_NOTICE([Only freestanding libraries will be built])
2163 enable_libstdcxx_pch=no
2168 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2169 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2170 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2175 dnl Check for template specializations for the 'long long' type.
2176 dnl The result determines only whether 'long long' I/O is enabled; things
2177 dnl like numeric_limits<> specializations are always available.
2179 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2180 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2181 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2182 dnl Where DEFAULT is either `yes' or `no'.
2184 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2185 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2186 if test $enable_long_long = yes; then
2187 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2188 [Define if code specialized for long long should be used.])
2190 AC_MSG_CHECKING([for enabled long long specializations])
2191 AC_MSG_RESULT([$enable_long_long])
2196 dnl Check for decimal floating point.
2198 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2200 dnl This checks to see if the host supports decimal floating point types.
2203 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2205 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2207 # Fake what AC_TRY_COMPILE does, without linking as this is
2208 # unnecessary for this test.
2210 cat > conftest.$ac_ext << EOF
2211 [#]line __oline__ "configure"
2221 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2222 if AC_TRY_EVAL(ac_compile); then
2223 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2224 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2229 AC_MSG_RESULT($enable_dfp)
2234 dnl Check for template specializations for the 'wchar_t' type.
2236 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2237 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2238 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2239 dnl Where DEFAULT is either `yes' or `no'.
2241 dnl Necessary support must also be present.
2243 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2244 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2246 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2247 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2248 AC_MSG_CHECKING([for mbstate_t])
2249 AC_TRY_COMPILE([#include <wchar.h>],
2250 [mbstate_t teststate;],
2251 have_mbstate_t=yes, have_mbstate_t=no)
2252 AC_MSG_RESULT($have_mbstate_t)
2253 if test x"$have_mbstate_t" = xyes; then
2254 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2257 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2259 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2261 if test x"$enable_wchar_t" = x"yes"; then
2266 if test x"$ac_has_wchar_h" = xyes &&
2267 test x"$ac_has_wctype_h" = xyes; then
2268 AC_TRY_COMPILE([#include <wchar.h>
2329 ],[],[], [enable_wchar_t=no])
2337 if test x"$enable_wchar_t" = x"yes"; then
2338 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2339 [Define if code specialized for wchar_t should be used.])
2342 AC_MSG_CHECKING([for enabled wchar_t specializations])
2343 AC_MSG_RESULT([$enable_wchar_t])
2348 dnl Check to see if building and using a C++ precompiled header can be done.
2350 dnl --enable-libstdcxx-pch=yes
2351 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2352 dnl may work, after some light-hearted attempts to puzzle out compiler
2353 dnl support, flip bits on in include/Makefile.am
2355 dnl --disable-libstdcxx-pch
2356 dnl turns off attempts to use or build stdc++.h.gch.
2359 dnl glibcxx_PCHFLAGS
2361 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2362 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2363 if test $enable_libstdcxx_pch = yes; then
2364 AC_CACHE_CHECK([for compiler with PCH support],
2365 [glibcxx_cv_prog_CXX_pch],
2366 [ac_save_CXXFLAGS="$CXXFLAGS"
2367 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2370 echo '#include <math.h>' > conftest.h
2371 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2372 -o conftest.h.gch 1>&5 2>&1 &&
2373 echo '#error "pch failed"' > conftest.h &&
2374 echo '#include "conftest.h"' > conftest.cc &&
2375 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2377 glibcxx_cv_prog_CXX_pch=yes
2379 glibcxx_cv_prog_CXX_pch=no
2382 CXXFLAGS=$ac_save_CXXFLAGS
2385 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2388 AC_MSG_CHECKING([for enabled PCH])
2389 AC_MSG_RESULT([$enable_libstdcxx_pch])
2391 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2392 if test $enable_libstdcxx_pch = yes; then
2393 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2397 AC_SUBST(glibcxx_PCHFLAGS)
2402 dnl Check for atomic builtins.
2404 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2406 dnl This checks to see if the host supports the compiler-generated
2407 dnl builtins for atomic operations for various integral sizes. Note, this
2408 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2409 dnl that are used should be checked.
2412 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
2415 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2416 dnl _GLIBCXX_ATOMIC_BUILTINS_2
2417 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2418 dnl _GLIBCXX_ATOMIC_BUILTINS_8
2420 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2423 old_CXXFLAGS="$CXXFLAGS"
2425 # Do link tests if possible, instead asm tests, limited to some platforms
2426 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
2427 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
2428 atomic_builtins_link_tests=no
2429 if test x$gcc_no_link != xyes; then
2430 # Can do link tests. Limit to some tested platforms
2432 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
2433 atomic_builtins_link_tests=yes
2438 if test x$atomic_builtins_link_tests = xyes; then
2442 CXXFLAGS="$CXXFLAGS -fno-exceptions"
2444 AC_MSG_CHECKING([for atomic builtins for bool])
2445 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
2448 [typedef bool atomic_type;
2451 const atomic_type c3(0);
2452 __sync_fetch_and_add(&c1, c2);
2453 __sync_val_compare_and_swap(&c1, c3, c2);
2454 __sync_lock_test_and_set(&c1, c3);
2455 __sync_lock_release(&c1);
2456 __sync_synchronize();],
2457 [glibcxx_cv_atomic_bool=yes],
2458 [glibcxx_cv_atomic_bool=no])
2460 if test $glibcxx_cv_atomic_bool = yes; then
2461 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2462 [Define if builtin atomic operations for bool are supported on this host.])
2464 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2466 AC_MSG_CHECKING([for atomic builtins for short])
2467 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
2470 [typedef short atomic_type;
2473 const atomic_type c3(0);
2474 __sync_fetch_and_add(&c1, c2);
2475 __sync_val_compare_and_swap(&c1, c3, c2);
2476 __sync_lock_test_and_set(&c1, c3);
2477 __sync_lock_release(&c1);
2478 __sync_synchronize();],
2479 [glibcxx_cv_atomic_short=yes],
2480 [glibcxx_cv_atomic_short=no])
2482 if test $glibcxx_cv_atomic_short = yes; then
2483 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
2484 [Define if builtin atomic operations for short are supported on this host.])
2486 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2488 AC_MSG_CHECKING([for atomic builtins for int])
2489 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
2492 [typedef int atomic_type;
2495 const atomic_type c3(0);
2496 __sync_fetch_and_add(&c1, c2);
2497 __sync_val_compare_and_swap(&c1, c3, c2);
2498 __sync_lock_test_and_set(&c1, c3);
2499 __sync_lock_release(&c1);
2500 __sync_synchronize();],
2501 [glibcxx_cv_atomic_int=yes],
2502 [glibcxx_cv_atomic_int=no])
2504 if test $glibcxx_cv_atomic_int = yes; then
2505 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2506 [Define if builtin atomic operations for int are supported on this host.])
2508 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2510 AC_MSG_CHECKING([for atomic builtins for long long])
2511 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
2514 [typedef long long atomic_type;
2517 const atomic_type c3(0);
2518 __sync_fetch_and_add(&c1, c2);
2519 __sync_val_compare_and_swap(&c1, c3, c2);
2520 __sync_lock_test_and_set(&c1, c3);
2521 __sync_lock_release(&c1);
2522 __sync_synchronize();],
2523 [glibcxx_cv_atomic_long_long=yes],
2524 [glibcxx_cv_atomic_long_long=no])
2526 if test $glibcxx_cv_atomic_long_long = yes; then
2527 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
2528 [Define if builtin atomic operations for long long are supported on this host.])
2530 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2536 # Compile unoptimized.
2539 # Fake what AC_TRY_COMPILE does.
2541 cat > conftest.$ac_ext << EOF
2542 [#]line __oline__ "configure"
2545 typedef bool atomic_type;
2548 const atomic_type c3(0);
2549 __sync_fetch_and_add(&c1, c2);
2550 __sync_val_compare_and_swap(&c1, c3, c2);
2551 __sync_lock_test_and_set(&c1, c3);
2552 __sync_lock_release(&c1);
2553 __sync_synchronize();
2558 AC_MSG_CHECKING([for atomic builtins for bool])
2559 if AC_TRY_EVAL(ac_compile); then
2560 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2561 glibcxx_cv_atomic_bool=no
2563 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2564 [Define if builtin atomic operations for bool are supported on this host.])
2565 glibcxx_cv_atomic_bool=yes
2568 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2571 cat > conftest.$ac_ext << EOF
2572 [#]line __oline__ "configure"
2575 typedef short atomic_type;
2578 const atomic_type c3(0);
2579 __sync_fetch_and_add(&c1, c2);
2580 __sync_val_compare_and_swap(&c1, c3, c2);
2581 __sync_lock_test_and_set(&c1, c3);
2582 __sync_lock_release(&c1);
2583 __sync_synchronize();
2588 AC_MSG_CHECKING([for atomic builtins for short])
2589 if AC_TRY_EVAL(ac_compile); then
2590 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2591 glibcxx_cv_atomic_short=no
2593 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
2594 [Define if builtin atomic operations for short are supported on this host.])
2595 glibcxx_cv_atomic_short=yes
2598 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2601 cat > conftest.$ac_ext << EOF
2602 [#]line __oline__ "configure"
2605 // NB: _Atomic_word not necessarily int.
2606 typedef int atomic_type;
2609 const atomic_type c3(0);
2610 __sync_fetch_and_add(&c1, c2);
2611 __sync_val_compare_and_swap(&c1, c3, c2);
2612 __sync_lock_test_and_set(&c1, c3);
2613 __sync_lock_release(&c1);
2614 __sync_synchronize();
2619 AC_MSG_CHECKING([for atomic builtins for int])
2620 if AC_TRY_EVAL(ac_compile); then
2621 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2622 glibcxx_cv_atomic_int=no
2624 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2625 [Define if builtin atomic operations for int are supported on this host.])
2626 glibcxx_cv_atomic_int=yes
2629 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2632 cat > conftest.$ac_ext << EOF
2633 [#]line __oline__ "configure"
2636 typedef long long atomic_type;
2639 const atomic_type c3(0);
2640 __sync_fetch_and_add(&c1, c2);
2641 __sync_val_compare_and_swap(&c1, c3, c2);
2642 __sync_lock_test_and_set(&c1, c3);
2643 __sync_lock_release(&c1);
2644 __sync_synchronize();
2649 AC_MSG_CHECKING([for atomic builtins for long long])
2650 if AC_TRY_EVAL(ac_compile); then
2651 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2652 glibcxx_cv_atomic_long_long=no
2654 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
2655 [Define if builtin atomic operations for long long are supported on this host.])
2656 glibcxx_cv_atomic_long_long=yes
2659 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2664 CXXFLAGS="$old_CXXFLAGS"
2667 # Set atomicity_dir to builtins if either of above tests pass.
2668 if test $glibcxx_cv_atomic_int = yes || test $glibcxx_cv_atomic_bool = yes ; then
2669 atomicity_dir=cpu/generic/atomicity_builtins
2672 # If still generic, set to mutex.
2673 if test $atomicity_dir = "cpu/generic" ; then
2674 atomicity_dir=cpu/generic/atomicity_mutex
2675 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2676 if test "x$target_thread_file" = xsingle; then
2677 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2678 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2680 AC_MSG_WARN([They will be faked using a mutex.])
2681 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2689 dnl Check for exception handling support. If an explicit enable/disable
2690 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2691 dnl target may or may not support call frame exceptions.
2693 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2694 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2695 dnl Neither one forces an attempt at detection.
2698 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2700 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2701 AC_MSG_CHECKING([for exception model to use])
2704 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2705 [force use of builtin_setjmp for exceptions],
2706 [permit yes|no|auto])
2708 if test $enable_sjlj_exceptions = auto; then
2709 # Botheration. Now we've got to detect the exception model. Link tests
2710 # against libgcc.a are problematic since we've not been given proper -L
2711 # bits for single-tree newlib and libgloss.
2713 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2714 cat > conftest.$ac_ext << EOF
2715 [#]line __oline__ "configure"
2724 old_CXXFLAGS="$CXXFLAGS"
2726 if AC_TRY_EVAL(ac_compile); then
2727 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2728 enable_sjlj_exceptions=yes
2729 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2730 enable_sjlj_exceptions=no
2731 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2732 enable_sjlj_exceptions=no
2735 CXXFLAGS="$old_CXXFLAGS"
2739 # This is a tad weird, for hysterical raisins. We have to map
2740 # enable/disable to two different models.
2741 case $enable_sjlj_exceptions in
2743 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2744 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2745 ac_exception_model_name=sjlj
2748 ac_exception_model_name="call frame"
2751 AC_MSG_ERROR([unable to detect exception model])
2755 AC_MSG_RESULT($ac_exception_model_name)
2760 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2762 dnl --enable-visibility enables attempt to use visibility attributes.
2763 dnl --disable-visibility turns off all use of visibility attributes.
2764 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2765 dnl Where DEFAULT is 'yes'.
2767 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2768 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2770 if test x$enable_visibility = xyes ; then
2771 dnl all hail libgfortran
2772 dnl Check whether the target supports hidden visibility.
2773 AC_CACHE_CHECK([whether the target supports hidden visibility],
2774 glibcxx_cv_have_attribute_visibility, [
2775 save_CFLAGS="$CFLAGS"
2776 CFLAGS="$CFLAGS -Werror"
2777 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2778 [], glibcxx_cv_have_attribute_visibility=yes,
2779 glibcxx_cv_have_attribute_visibility=no)
2780 CFLAGS="$save_CFLAGS"])
2781 if test $glibcxx_cv_have_attribute_visibility = no; then
2782 enable_visibility=no
2786 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2787 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2792 dnl Add version tags to symbols in shared library (or not), additionally
2793 dnl marking other symbols as private/local (or not).
2795 dnl --enable-symvers=style adds a version script to the linker call when
2796 dnl creating the shared library. The choice of version script is
2797 dnl controlled by 'style'.
2798 dnl --disable-symvers does not.
2799 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2800 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2801 dnl choose a default style based on linker characteristics. Passing
2802 dnl 'no' disables versioning.
2804 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2806 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2807 [enables symbol versioning of the shared library],
2808 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2810 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2811 # don't know enough about $LD to do tricks...
2812 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2814 # Turn a 'yes' into a suitable default.
2815 if test x$enable_symvers = xyes ; then
2816 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2819 if test $with_gnu_ld = yes ; then
2820 case ${target_os} in
2822 enable_symvers=no ;;
2824 enable_symvers=gnu ;;
2827 case ${target_os} in
2829 enable_symvers=darwin ;;
2831 enable_symvers=no ;;
2837 # Check to see if 'darwin' or 'darwin-export' can win.
2838 if test x$enable_symvers = xdarwin-export ; then
2839 enable_symvers=darwin
2842 # Check to see if 'gnu' can win.
2843 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2844 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2845 AC_MSG_CHECKING([for shared libgcc])
2846 ac_save_CFLAGS="$CFLAGS"
2848 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2849 CFLAGS="$ac_save_CFLAGS"
2850 if test $glibcxx_shared_libgcc = no; then
2851 cat > conftest.c <<EOF
2852 int main (void) { return 0; }
2855 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2856 -shared -shared-libgcc -o conftest.so \
2857 conftest.c -v 2>&1 >/dev/null \
2858 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2860 rm -f conftest.c conftest.so
2861 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2862 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2863 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2864 CFLAGS="$ac_save_CFLAGS"
2867 AC_MSG_RESULT($glibcxx_shared_libgcc)
2869 # For GNU ld, we need at least this version. The format is described in
2870 # GLIBCXX_CHECK_LINKER_FEATURES above.
2871 glibcxx_min_gnu_ld_version=21400
2873 # If no shared libgcc, can't win.
2874 if test $glibcxx_shared_libgcc != yes; then
2875 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2876 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2877 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2879 elif test $with_gnu_ld != yes ; then
2881 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2882 AC_MSG_WARN([=== you are not using the GNU linker.])
2883 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2885 elif test $glibcxx_ld_is_gold = yes ; then
2886 : All versions of gold support symbol versioning.
2887 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2888 # The right tools, the right setup, but too old. Fallbacks?
2889 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2890 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2891 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2892 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2893 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2898 # Everything parsed; figure out what file to use.
2899 case $enable_symvers in
2901 SYMVER_FILE=config/abi/pre/none.ver
2904 SYMVER_FILE=config/abi/pre/gnu.ver
2905 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2906 [Define to use GNU versioning in the shared library.])
2908 gnu-versioned-namespace)
2909 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2910 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2911 [Define to use GNU namespace versioning in the shared library.])
2914 SYMVER_FILE=config/abi/pre/gnu.ver
2915 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2916 [Define to use darwin versioning in the shared library.])
2920 if test x$enable_symvers != xno ; then
2921 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2922 [Define to use symbol versioning in the shared library.])
2925 AC_CACHE_CHECK([whether the target supports .symver directive],
2926 glibcxx_cv_have_as_symver_directive, [
2927 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
2928 [], glibcxx_cv_have_as_symver_directive=yes,
2929 glibcxx_cv_have_as_symver_directive=no)])
2930 if test $glibcxx_cv_have_as_symver_directive = yes; then
2931 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
2932 [Define to 1 if the target assembler supports .symver directive.])
2935 AC_SUBST(SYMVER_FILE)
2936 AC_SUBST(port_specific_symbol_files)
2937 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2938 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2939 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2940 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2941 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2943 # Now, set up compatibility support, if any.
2944 # In addition, need this to deal with std::size_t mangling in
2945 # src/compatibility.cc. In a perfect world, could use
2946 # typeid(std::size_t).name()[0] to do direct substitution.
2947 AC_MSG_CHECKING([for size_t as unsigned int])
2948 ac_save_CFLAGS="$CFLAGS"
2950 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2951 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2952 CFLAGS=$ac_save_CFLAGS
2953 if test "$glibcxx_size_t_is_i" = yes; then
2954 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2956 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2958 AC_MSG_CHECKING([for ptrdiff_t as int])
2959 ac_save_CFLAGS="$CFLAGS"
2961 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2962 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2963 CFLAGS=$ac_save_CFLAGS
2964 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2965 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2967 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2972 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2973 dnl We must stage the required headers so that they will be installed
2974 dnl with the library (unlike libgcc, the STL implementation is provided
2975 dnl solely within headers). Since we must not inject random user-space
2976 dnl macro names into user-provided C++ code, we first stage into <file>-in
2977 dnl and process to <file> with an output command. The reason for a two-
2978 dnl stage process here is to correctly handle $srcdir!=$objdir without
2979 dnl having to write complex code (the sed commands to clean the macro
2980 dnl namespace are complex and fragile enough as it is). We must also
2981 dnl add a relative path so that -I- is supported properly.
2984 dnl glibcxx_thread_h
2987 dnl HAVE_GTHR_DEFAULT
2989 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2990 AC_MSG_CHECKING([for thread model used by GCC])
2991 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2992 AC_MSG_RESULT([$target_thread_file])
2994 if test $target_thread_file != single; then
2995 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2996 [Define if gthr-default.h exists
2997 (meaning that threading support is enabled).])
3000 glibcxx_thread_h=gthr-$target_thread_file.h
3002 dnl Check for __GTHREADS define.
3003 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
3004 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
3010 AC_SUBST(glibcxx_thread_h)
3015 dnl Check if gthread implementation defines the types and functions
3016 dnl required by the c++0x thread library. Conforming gthread
3017 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3019 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3023 ac_save_CXXFLAGS="$CXXFLAGS"
3024 CXXFLAGS="$CXXFLAGS -fno-exceptions -I${toplevel_srcdir}/gcc"
3026 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3027 case $target_thread_file in
3029 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3032 AC_MSG_CHECKING([for gthreads library])
3034 AC_TRY_COMPILE([#include "gthr.h"],
3036 #ifndef __GTHREADS_CXX0X
3040 // In case of POSIX threads check _POSIX_TIMEOUTS too.
3041 #if (defined(_PTHREADS) \
3042 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3045 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3047 AC_MSG_RESULT([$ac_has_gthreads])
3049 if test x"$ac_has_gthreads" = x"yes"; then
3050 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3051 [Define if gthreads library is available.])
3054 CXXFLAGS="$ac_save_CXXFLAGS"
3059 # Check whether LC_MESSAGES is available in <locale.h>.
3060 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3062 # This file file be copied and used freely without restrictions. It can
3063 # be used in projects which are not available under the GNU Public License
3064 # but which still want to provide support for the GNU gettext functionality.
3065 # Please note that the actual code is *not* freely available.
3066 AC_DEFUN([AC_LC_MESSAGES], [
3067 AC_CHECK_HEADER(locale.h, [
3068 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3069 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3070 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3071 if test $ac_cv_val_LC_MESSAGES = yes; then
3072 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3073 [Define if LC_MESSAGES is available in <locale.h>.])
3078 # Macros from the top-level gcc directory.
3079 m4_include([../config/tls.m4])