2 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
4 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
5 dnl end of configure. This lets tested variables be reassigned, and the
6 dnl conditional will depend on the final state of the variable. For a simple
7 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
9 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
10 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
11 m4_divert_text([glibcxx_diversion],dnl
12 AM_CONDITIONAL([$1],[$2])
15 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
19 dnl Check to see what architecture and operating system we are compiling
20 dnl for. Also, if architecture- or OS-specific flags are required for
21 dnl compilation, pick them up here.
23 AC_DEFUN([GLIBCXX_CHECK_HOST], [
24 . $glibcxx_srcdir/configure.host
25 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
26 AC_MSG_NOTICE([OS config directory is $os_include_dir])
30 dnl Initialize the rest of the library configury. At this point we have
31 dnl variables like $host.
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_builddir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 doc po testsuite python])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
63 toplevel_builddir=${glibcxx_builddir}/..
64 toplevel_srcdir=${glibcxx_srcdir}/..
65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
67 AC_SUBST(toplevel_builddir)
68 AC_SUBST(toplevel_srcdir)
70 # We use these options to decide which functions to include. They are
71 # set from the top level.
72 AC_ARG_WITH([target-subdir],
73 AC_HELP_STRING([--with-target-subdir=SUBDIR],
74 [configuring in a subdirectory]))
76 AC_ARG_WITH([cross-host],
77 AC_HELP_STRING([--with-cross-host=HOST],
78 [configuring with a cross compiler]))
81 AC_HELP_STRING([--with-newlib],
82 [assume newlib as a system C library]))
84 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
85 # available). Uncomment the next line to force a particular method.
91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
95 # Set up safe default values for all subsequent AM_CONDITIONAL tests
96 # which are themselves conditionally expanded.
97 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
98 ## other macros from doing the same. This should be automated.) -pme
100 # Check for C library flavor since GNU/Linux platforms use different
101 # configuration directories depending on the C library in use.
102 AC_EGREP_CPP([_using_uclibc], [
107 ], uclibc=yes, uclibc=no)
109 AC_EGREP_CPP([_using_bionic], [
114 ], bionic=yes, bionic=no)
116 # Find platform-specific directories containing configuration info.
117 # Also possibly modify flags used elsewhere, as needed by the platform.
123 dnl Tests for newer compiler features, or features that are present in newer
124 dnl compiler versions but not older compiler versions still in use, should
128 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
129 dnl new inlining code or the new system_header pragma will die on -Werror.
130 dnl Leave it out by default and use maint-mode to use it.
131 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
132 dnl compiler supports it and the user has not requested debug mode.
134 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
135 # All these tests are for C++; save the language and the compiler flags.
136 # The CXXFLAGS thing is suspicious, but based on similar bits previously
137 # found in GLIBCXX_CONFIGURE.
140 ac_test_CXXFLAGS="${CXXFLAGS+set}"
141 ac_save_CXXFLAGS="$CXXFLAGS"
143 # Check for maintainer-mode bits.
144 if test x"$USE_MAINTAINER_MODE" = xno; then
150 # Check for -ffunction-sections -fdata-sections
151 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
152 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
153 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
154 if test "$ac_test_CXXFLAGS" = set; then
155 CXXFLAGS="$ac_save_CXXFLAGS"
157 # this is the suspicious part
160 if test x"$ac_fdsections" = x"yes"; then
161 SECTION_FLAGS='-ffunction-sections -fdata-sections'
163 AC_MSG_RESULT($ac_fdsections)
167 AC_SUBST(SECTION_FLAGS)
172 dnl Check if the assembler used supports disabling generation of hardware
173 dnl capabilities. This is only supported by Sun as at the moment.
176 dnl HWCAP_FLAGS='-Wa,-nH' if possible.
178 AC_DEFUN([GLIBCXX_CHECK_ASSEMBLER_HWCAP], [
179 test -z "$HWCAP_FLAGS" && HWCAP_FLAGS=''
181 # Restrict the test to Solaris, other assemblers (e.g. AIX as) have -nH
182 # with a different meaning.
185 ac_save_CFLAGS="$CFLAGS"
186 CFLAGS="$CFLAGS -Wa,-nH"
188 AC_MSG_CHECKING([for as that supports -Wa,-nH])
189 AC_TRY_COMPILE([], [return 0;], [ac_hwcap_flags=yes],[ac_hwcap_flags=no])
190 if test "$ac_hwcap_flags" = "yes"; then
191 HWCAP_FLAGS="-Wa,-nH $HWCAP_FLAGS"
193 AC_MSG_RESULT($ac_hwcap_flags)
195 CFLAGS="$ac_save_CFLAGS"
199 AC_SUBST(HWCAP_FLAGS)
204 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
205 dnl the native linker is in use, all variables will be defined to something
206 dnl safe (like an empty string).
209 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
210 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
211 dnl LD (as a side effect of testing)
214 dnl glibcxx_ld_is_gold (set to "no" or "yes")
215 dnl glibcxx_gnu_ld_version (possibly)
217 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
218 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
220 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
221 # If we're not using GNU ld, then there's no point in even trying these
222 # tests. Check for that first. We should have already tested for gld
223 # by now (in libtool), but require it now just to be safe...
224 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
225 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
226 AC_REQUIRE([AC_PROG_LD])
227 AC_REQUIRE([AC_PROG_AWK])
229 # The name set by libtool depends on the version of libtool. Shame on us
230 # for depending on an impl detail, but c'est la vie. Older versions used
231 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
232 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
233 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
234 # set (hence we're using an older libtool), then set it.
235 if test x${with_gnu_ld+set} != xset; then
236 if test x${ac_cv_prog_gnu_ld+set} != xset; then
237 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
240 with_gnu_ld=$ac_cv_prog_gnu_ld
244 # Start by getting the version number. I think the libtool test already
245 # does some of this, but throws away the result.
246 glibcxx_ld_is_gold=no
247 if test x"$with_gnu_ld" = x"yes"; then
248 AC_MSG_CHECKING([for ld version])
250 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
251 glibcxx_ld_is_gold=yes
253 ldver=`$LD --version 2>/dev/null |
254 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'`
256 glibcxx_gnu_ld_version=`echo $ldver | \
257 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
258 AC_MSG_RESULT($glibcxx_gnu_ld_version)
262 glibcxx_have_gc_sections=no
263 if test "$glibcxx_ld_is_gold" = "yes"; then
264 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
265 glibcxx_have_gc_sections=yes
268 glibcxx_gcsections_min_ld=21602
269 if test x"$with_gnu_ld" = x"yes" &&
270 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
271 glibcxx_have_gc_sections=yes
274 if test "$glibcxx_have_gc_sections" = "yes"; then
275 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
276 # NB: This flag only works reliably after 2.16.1. Configure tests
277 # for this are difficult, so hard wire a value that should work.
279 ac_test_CFLAGS="${CFLAGS+set}"
280 ac_save_CFLAGS="$CFLAGS"
281 CFLAGS='-Wl,--gc-sections'
283 # Check for -Wl,--gc-sections
284 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
285 AC_TRY_LINK([ int one(void) { return 1; }
286 int two(void) { return 2; }
287 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
288 if test "$ac_gcsections" = "yes"; then
291 if $CC -c conftest.c; then
292 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
293 grep "Warning: gc-sections option ignored" > /dev/null; then
297 rm -f conftest.c conftest.o conftest
299 if test "$ac_gcsections" = "yes"; then
300 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
302 AC_MSG_RESULT($ac_gcsections)
304 if test "$ac_test_CFLAGS" = set; then
305 CFLAGS="$ac_save_CFLAGS"
307 # this is the suspicious part
313 # Note this is only for shared objects.
315 if test x"$with_gnu_ld" = x"yes"; then
316 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
317 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
318 if test -n "$cxx_z_relo"; then
319 OPT_LDFLAGS="-Wl,-z,relro"
322 AC_MSG_RESULT($ac_ld_relro)
325 # Set linker optimization flags.
326 if test x"$with_gnu_ld" = x"yes"; then
327 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
330 AC_SUBST(SECTION_LDFLAGS)
331 AC_SUBST(OPT_LDFLAGS)
336 dnl Check for headers for, and arguments to, the setrlimit() function.
337 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
340 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
341 dnl various HAVE_LIMIT_* for individual limit names
343 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
344 AC_MSG_CHECKING([for RLIMIT_$1])
347 #include <sys/time.h>
348 #include <sys/resource.h>
350 [ int f = RLIMIT_$1 ; ],
351 [glibcxx_mresult=1], [glibcxx_mresult=0])
352 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
353 [Only used in build directory testsuite_hooks.h.])
354 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
358 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
359 setrlimit_have_headers=yes
360 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
362 [setrlimit_have_headers=no])
363 # If don't have the headers, then we can't run the tests now, and we
364 # won't be seeing any of these during testsuite compilation.
365 if test $setrlimit_have_headers = yes; then
366 # Can't do these in a loop, else the resulting syntax is wrong.
367 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
368 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
369 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
370 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
371 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
373 # Check for rlimit, setrlimit.
374 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
377 #include <sys/time.h>
378 #include <sys/resource.h>
382 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
386 AC_MSG_CHECKING([for testsuite resource limits support])
387 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
389 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
390 [Define if using setrlimit to set resource limits during
395 AC_MSG_RESULT($ac_res_limits)
400 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
401 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
403 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
407 ac_save_CXXFLAGS="$CXXFLAGS"
408 CXXFLAGS="$CXXFLAGS -fno-exceptions"
410 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
411 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
412 GCC_TRY_COMPILE_OR_LINK(
413 [#include <sys/stat.h>],
416 S_ISREG(buffer.st_mode);],
417 [glibcxx_cv_S_ISREG=yes],
418 [glibcxx_cv_S_ISREG=no])
420 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
421 GCC_TRY_COMPILE_OR_LINK(
422 [#include <sys/stat.h>],
425 S_IFREG & buffer.st_mode;],
426 [glibcxx_cv_S_IFREG=yes],
427 [glibcxx_cv_S_IFREG=no])
430 if test $glibcxx_cv_S_ISREG = yes; then
431 AC_DEFINE(HAVE_S_ISREG, 1,
432 [Define if S_IFREG is available in <sys/stat.h>.])
434 elif test $glibcxx_cv_S_IFREG = yes; then
435 AC_DEFINE(HAVE_S_IFREG, 1,
436 [Define if S_IFREG is available in <sys/stat.h>.])
441 CXXFLAGS="$ac_save_CXXFLAGS"
447 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
449 AC_DEFUN([GLIBCXX_CHECK_POLL], [
453 ac_save_CXXFLAGS="$CXXFLAGS"
454 CXXFLAGS="$CXXFLAGS -fno-exceptions"
456 AC_MSG_CHECKING([for poll])
457 AC_CACHE_VAL(glibcxx_cv_POLL, [
458 GCC_TRY_COMPILE_OR_LINK(
460 [struct pollfd pfd[1];
461 pfd[0].events = POLLIN;
463 [glibcxx_cv_POLL=yes],
464 [glibcxx_cv_POLL=no])
466 if test $glibcxx_cv_POLL = yes; then
467 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
469 AC_MSG_RESULT($glibcxx_cv_POLL)
471 CXXFLAGS="$ac_save_CXXFLAGS"
477 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
479 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
483 ac_save_CXXFLAGS="$CXXFLAGS"
484 CXXFLAGS="$CXXFLAGS -fno-exceptions"
486 AC_MSG_CHECKING([for writev])
487 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
488 GCC_TRY_COMPILE_OR_LINK(
489 [#include <sys/uio.h>],
490 [struct iovec iov[2];
492 [glibcxx_cv_WRITEV=yes],
493 [glibcxx_cv_WRITEV=no])
495 if test $glibcxx_cv_WRITEV = yes; then
496 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
498 AC_MSG_RESULT($glibcxx_cv_WRITEV)
500 CXXFLAGS="$ac_save_CXXFLAGS"
506 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
507 dnl Also check whether int64_t is actually a typedef to long or long long.
509 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
514 AC_MSG_CHECKING([for int64_t])
515 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
517 [#include <stdint.h>],
519 [glibcxx_cv_INT64_T=yes],
520 [glibcxx_cv_INT64_T=no])
523 if test $glibcxx_cv_INT64_T = yes; then
524 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
525 AC_MSG_RESULT($glibcxx_cv_INT64_T)
527 AC_MSG_CHECKING([for int64_t as long])
528 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
531 template<typename, typename> struct same { enum { value = -1 }; };
532 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
533 int array[same<int64_t, long>::value];], [],
534 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
537 if test $glibcxx_cv_int64_t_long = yes; then
538 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
539 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
542 AC_MSG_CHECKING([for int64_t as long long])
543 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
546 template<typename, typename> struct same { enum { value = -1 }; };
547 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
548 int array[same<int64_t, long long>::value];], [],
549 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
552 if test $glibcxx_cv_int64_t_long_long = yes; then
553 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
554 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
563 dnl Check whether LFS support is available.
565 AC_DEFUN([GLIBCXX_CHECK_LFS], [
568 ac_save_CXXFLAGS="$CXXFLAGS"
569 CXXFLAGS="$CXXFLAGS -fno-exceptions"
570 AC_MSG_CHECKING([for LFS support])
571 AC_CACHE_VAL(glibcxx_cv_LFS, [
572 GCC_TRY_COMPILE_OR_LINK(
575 #include <sys/stat.h>
579 fseeko64(fp, 0, SEEK_CUR);
581 lseek64(1, 0, SEEK_CUR);
584 [glibcxx_cv_LFS=yes],
587 if test $glibcxx_cv_LFS = yes; then
588 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
590 AC_MSG_RESULT($glibcxx_cv_LFS)
591 CXXFLAGS="$ac_save_CXXFLAGS"
597 dnl Check for whether a fully dynamic basic_string implementation should
598 dnl be turned on, that does not put empty objects in per-process static
599 dnl memory (mostly useful together with shared memory allocators, see PR
600 dnl libstdc++/16612 for details).
602 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
603 dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
604 dnl otherwise undefined
605 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
606 dnl Where DEFAULT is either `yes' or `no'.
608 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
609 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
610 if test $enable_fully_dynamic_string = yes; then
611 enable_fully_dynamic_string_def=1
613 enable_fully_dynamic_string_def=0
615 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
616 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
621 dnl Does any necessary configuration of the testsuite directory. Generates
622 dnl the testsuite_hooks.h header.
624 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
628 dnl GLIBCXX_TEST_WCHAR_T
629 dnl GLIBCXX_TEST_THREAD
632 dnl baseline_subdir_switch
634 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
635 if $GLIBCXX_IS_NATIVE ; then
636 # Do checks for resource limit functions.
637 GLIBCXX_CHECK_SETRLIMIT
639 # Look for setenv, so that extended locale tests can be performed.
640 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
643 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
644 test $enable_symvers != no; then
647 enable_abi_check=no ;;
649 enable_abi_check=yes ;;
652 # Only build this as native, since automake does not understand
657 # Export file names for ABI checking.
658 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
659 AC_SUBST(baseline_dir)
660 baseline_subdir_switch="$abi_baseline_subdir_switch"
661 AC_SUBST(baseline_subdir_switch)
666 dnl Does any necessary configuration for docbook in the docs directory.
668 dnl XSLTPROC must be set before this
671 dnl glibcxx_stylesheets
675 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
677 AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
678 glibcxx_stylesheets=no
679 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude http://docbook.sourceforge.net/release/xsl-ns/current/xhtml-1_1/docbook.xsl - 2>/dev/null; then
680 glibcxx_stylesheets=yes
682 AC_MSG_RESULT($glibcxx_stylesheets)
684 AC_MSG_CHECKING([for local stylesheet directory])
685 glibcxx_local_stylesheets=no
686 if test x"$glibcxx_stylesheets" = x"yes"; then
687 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then
688 glibcxx_local_stylesheets=yes
689 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets
691 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then
692 glibcxx_local_stylesheets=yes
693 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
695 if test -d /usr/share/xml/docbook/stylesheet/nwalsh5/current; then
696 glibcxx_local_stylesheets=yes
697 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/nwalsh5/current
700 AC_MSG_RESULT($glibcxx_local_stylesheets)
702 if test x"$glibcxx_local_stylesheets" = x"yes"; then
703 AC_SUBST(XSL_STYLE_DIR)
704 AC_MSG_NOTICE($XSL_STYLE_DIR)
706 glibcxx_stylesheets=no
709 # Check for epub3 dependencies.
710 AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
711 glibcxx_epub_stylesheets=no
712 if test x"$glibcxx_local_stylesheets" = x"yes"; then
713 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
714 glibcxx_epub_stylesheets=yes
717 AC_MSG_RESULT($glibcxx_epub_stylesheets)
718 AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
724 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
728 dnl TOPLEVEL_INCLUDES
730 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
731 # Used for every C++ compile we perform.
733 -I$glibcxx_builddir/include/$host_alias \
734 -I$glibcxx_builddir/include \
735 -I$glibcxx_srcdir/libsupc++"
737 # For Canadian crosses, pick this up too.
738 if test $CANADIAN = yes; then
739 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
742 # Stuff in the actual top level. Currently only used by libsupc++ to
743 # get unwind* headers from the libgcc dir.
744 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
745 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
747 # Now, export this to all the little Makefiles....
748 AC_SUBST(GLIBCXX_INCLUDES)
749 AC_SUBST(TOPLEVEL_INCLUDES)
754 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
755 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
758 dnl OPTIMIZE_CXXFLAGS
761 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
762 # Optimization flags that are probably a good idea for thrill-seekers. Just
763 # uncomment the lines below and make, everything else is ready to go...
764 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
765 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
766 AC_SUBST(OPTIMIZE_CXXFLAGS)
768 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi'
774 dnl All installation directory information is determined here.
778 dnl glibcxx_prefixdir
779 dnl glibcxx_toolexecdir
780 dnl glibcxx_toolexeclibdir
782 dnl Assumes cross_compiling bits already done, and with_cross_host in
785 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
786 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
787 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
788 glibcxx_toolexecdir=no
789 glibcxx_toolexeclibdir=no
790 glibcxx_prefixdir=$prefix
792 AC_MSG_CHECKING([for gxx-include-dir])
793 AC_ARG_WITH([gxx-include-dir],
794 AC_HELP_STRING([--with-gxx-include-dir=DIR],
795 [installation directory for include files]),
797 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
798 no) gxx_include_dir=no ;;
799 *) gxx_include_dir=$withval ;;
801 [gxx_include_dir=no])
802 AC_MSG_RESULT($gxx_include_dir)
804 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
805 AC_ARG_ENABLE([version-specific-runtime-libs],
806 AC_HELP_STRING([--enable-version-specific-runtime-libs],
807 [Specify that runtime libraries should be installed in a compiler-specific directory]),
808 [case "$enableval" in
809 yes) version_specific_libs=yes ;;
810 no) version_specific_libs=no ;;
811 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
813 [version_specific_libs=no])
814 AC_MSG_RESULT($version_specific_libs)
816 # Default case for install directory for include files.
817 if test $version_specific_libs = no && test $gxx_include_dir = no; then
818 gxx_include_dir='include/c++/${gcc_version}'
819 if test -n "$with_cross_host" &&
820 test x"$with_cross_host" != x"no"; then
821 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
823 gxx_include_dir='${prefix}/'"$gxx_include_dir"
827 # Version-specific runtime libs processing.
828 if test $version_specific_libs = yes; then
829 # Need the gcc compiler version to know where to install libraries
830 # and header files if --enable-version-specific-runtime-libs option
831 # is selected. FIXME: these variables are misnamed, there are
832 # no executables installed in _toolexecdir or _toolexeclibdir.
833 if test x"$gxx_include_dir" = x"no"; then
834 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
836 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
837 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
840 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
841 # Install a library built with a cross compiler in tooldir, not libdir.
842 if test x"$glibcxx_toolexecdir" = x"no"; then
843 if test -n "$with_cross_host" &&
844 test x"$with_cross_host" != x"no"; then
845 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
846 glibcxx_toolexeclibdir='${toolexecdir}/lib'
848 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
849 glibcxx_toolexeclibdir='${libdir}'
851 multi_os_directory=`$CXX -print-multi-os-directory`
852 case $multi_os_directory in
853 .) ;; # Avoid trailing /.
854 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
858 AC_MSG_CHECKING([for install location])
859 AC_MSG_RESULT($gxx_include_dir)
861 AC_SUBST(glibcxx_prefixdir)
862 AC_SUBST(gxx_include_dir)
863 AC_SUBST(glibcxx_toolexecdir)
864 AC_SUBST(glibcxx_toolexeclibdir)
870 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
871 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
872 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
874 dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
877 m4_define([GLIBCXX_ENABLE],[dnl
878 m4_define([_g_switch],[--enable-$1])dnl
879 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
880 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
885 m4_bpatsubst([$5],[permit ])) ;;
886 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
887 dnl Idea for future: generate a URL pointing to
888 dnl "onlinedocs/configopts.html#whatever"
895 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
899 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
900 m4_undefine([_g_switch])dnl
901 m4_undefine([_g_help])dnl
906 dnl Check for ISO/IEC 9899:1999 "C99" support.
908 dnl --enable-c99 defines _GLIBCXX_USE_C99
909 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
910 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
911 dnl Where DEFAULT is either `yes' or `no'.
912 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
914 AC_DEFUN([GLIBCXX_ENABLE_C99], [
915 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
917 if test x"$enable_c99" = x"yes"; then
922 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
923 # undefined and fake C99 facilities - like pre-standard snprintf - may be
924 # spuriously enabled.
925 # Long term, -std=c++0x could be even better, could manage to explicitly
926 # request C99 facilities to the underlying C headers.
927 ac_save_CXXFLAGS="$CXXFLAGS"
928 CXXFLAGS="$CXXFLAGS -std=c++98"
930 ac_save_gcc_no_link="$gcc_no_link"
932 if test x$gcc_no_link != xyes; then
933 # Use -fno-exceptions to that the C driver can link these tests without
934 # hitting undefined references to personality routines.
935 CXXFLAGS="$CXXFLAGS -fno-exceptions"
936 AC_CHECK_LIB(m, sin, [
939 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
944 # Check for the existence of <math.h> functions used if C99 is enabled.
945 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
946 AC_CACHE_VAL(glibcxx_cv_c99_math, [
947 GCC_TRY_COMPILE_OR_LINK(
949 volatile double d1, d2;
957 i = isgreater(d1, d2);
958 i = isgreaterequal(d1, d2);
960 i = islessequal(d1, d2);
961 i = islessgreater(d1, d2);
962 i = islessgreater(d1, d2);
963 i = isunordered(d1, d2);
964 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
966 AC_MSG_RESULT($glibcxx_cv_c99_math)
967 if test x"$glibcxx_cv_c99_math" = x"yes"; then
968 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
969 [Define if C99 functions or macros in <math.h> should be imported
970 in <cmath> in namespace std.])
973 # Check for the existence of <complex.h> complex math functions.
974 # This is necessary even though libstdc++ uses the builtin versions
975 # of these functions, because if the builtin cannot be used, a reference
976 # to the library function is emitted.
977 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
978 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
979 glibcxx_cv_c99_complex=no;
980 if test x"$ac_has_complex_h" = x"yes"; then
981 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
982 GCC_TRY_COMPILE_OR_LINK(
983 [#include <complex.h>
984 typedef __complex__ float float_type;
985 typedef __complex__ double double_type;
986 typedef __complex__ long double ld_type;
987 volatile float_type tmpf;
988 volatile double_type tmpd;
989 volatile ld_type tmpld;
992 volatile long double ld;],
1000 tmpf = csinhf(tmpf);
1001 tmpf = csqrtf(tmpf);
1003 tmpf = ctanhf(tmpf);
1004 tmpf = cpowf(tmpf, tmpf);
1005 tmpf = cprojf(tmpf);
1017 tmpd = cpow(tmpd, tmpd);
1021 tmpld = ccosl(tmpld);
1022 tmpld = ccoshl(tmpld);
1023 tmpld = cexpl(tmpld);
1024 tmpld = clogl(tmpld);
1025 tmpld = csinl(tmpld);
1026 tmpld = csinhl(tmpld);
1027 tmpld = csqrtl(tmpld);
1028 tmpld = ctanl(tmpld);
1029 tmpld = ctanhl(tmpld);
1030 tmpld = cpowl(tmpld, tmpld);
1031 tmpld = cprojl(tmpld);
1032 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
1034 AC_MSG_RESULT($glibcxx_cv_c99_complex)
1035 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
1036 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
1037 [Define if C99 functions in <complex.h> should be used in
1038 <complex>. Using compiler builtins for these functions requires
1039 corresponding C99 library functions to be present.])
1042 # Check for the existence in <stdio.h> of vscanf, et. al.
1043 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1044 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
1045 GCC_TRY_COMPILE_OR_LINK(
1048 void foo(char* fmt, ...)
1050 va_list args; va_start(args, fmt);
1051 vfscanf(stderr, "%i", args);
1053 vsnprintf(fmt, 0, "%i", args);
1054 vsscanf(fmt, "%i", args);
1055 snprintf(fmt, 0, "%i");
1057 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
1059 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
1061 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1062 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1063 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
1064 GCC_TRY_COMPILE_OR_LINK(
1065 [#include <stdlib.h>
1067 volatile long double ld;
1068 volatile unsigned long long ll;
1071 f = strtof("gnu", &tmp);
1072 ld = strtold("gnu", &tmp);
1073 ll = strtoll("gnu", &tmp, 10);
1074 ll = strtoull("gnu", &tmp, 10);
1076 mydivt = lldiv(10,1);
1081 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
1083 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
1085 # Check for the existence in <wchar.h> of wcstold, etc.
1086 glibcxx_cv_c99_wchar=no;
1087 if test x"$ac_has_wchar_h" = xyes &&
1088 test x"$ac_has_wctype_h" = xyes; then
1089 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1090 AC_TRY_COMPILE([#include <wchar.h>
1097 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
1099 # Checks for wide character functions that may not be present.
1100 # Injection of these is wrapped with guard macros.
1101 # NB: only put functions here, instead of immediately above, if
1102 # absolutely necessary.
1103 AC_TRY_COMPILE([#include <wchar.h>
1104 namespace test { using ::vfwscanf; } ], [],
1105 [AC_DEFINE(HAVE_VFWSCANF,1,
1106 [Defined if vfwscanf exists.])],[])
1108 AC_TRY_COMPILE([#include <wchar.h>
1109 namespace test { using ::vswscanf; } ], [],
1110 [AC_DEFINE(HAVE_VSWSCANF,1,
1111 [Defined if vswscanf exists.])],[])
1113 AC_TRY_COMPILE([#include <wchar.h>
1114 namespace test { using ::vwscanf; } ], [],
1115 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1117 AC_TRY_COMPILE([#include <wchar.h>
1118 namespace test { using ::wcstof; } ], [],
1119 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1121 AC_TRY_COMPILE([#include <wctype.h>],
1122 [ wint_t t; int i = iswblank(t);],
1123 [AC_DEFINE(HAVE_ISWBLANK,1,
1124 [Defined if iswblank exists.])],[])
1126 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1129 # Option parsed, now set things appropriately.
1130 if test x"$glibcxx_cv_c99_math" = x"no" ||
1131 test x"$glibcxx_cv_c99_complex" = x"no" ||
1132 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1133 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1134 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1137 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1138 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1139 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1142 gcc_no_link="$ac_save_gcc_no_link"
1143 LIBS="$ac_save_LIBS"
1144 CXXFLAGS="$ac_save_CXXFLAGS"
1148 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1149 AC_MSG_RESULT($enable_c99)
1154 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1155 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1156 dnl in the C++11 standard.
1158 dnl --enable-libstdcxx-time
1159 dnl --enable-libstdcxx-time=yes
1160 dnl checks for the availability of monotonic and realtime clocks,
1161 dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1162 dnl links in the latter.
1163 dnl --enable-libstdcxx-time=rt
1164 dnl also searches (and, if needed, links) librt. Note that this is
1165 dnl not always desirable because, in glibc 2.16 and earlier, for
1166 dnl example, in turn it triggers the linking of libpthread too,
1167 dnl which activates locking,
1168 dnl a large overhead for single-thread programs.
1169 dnl --enable-libstdcxx-time=no
1170 dnl --disable-libstdcxx-time
1171 dnl disables the checks completely
1173 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1174 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1175 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1176 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1178 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1180 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
1181 [use KIND for check type],
1186 ac_save_CXXFLAGS="$CXXFLAGS"
1187 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1188 ac_save_LIBS="$LIBS"
1190 ac_has_clock_monotonic=no
1191 ac_has_clock_realtime=no
1193 ac_has_sched_yield=no
1195 if test x"$enable_libstdcxx_time" = x"auto"; then
1197 case "${target_os}" in
1199 ac_has_nanosleep=yes
1202 ac_has_nanosleep=yes
1203 ac_has_sched_yield=yes
1205 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1206 AC_MSG_CHECKING([for at least GNU libc 2.17])
1208 [#include <features.h>],
1210 #if ! __GLIBC_PREREQ(2, 17)
1214 [glibcxx_glibc217=yes], [glibcxx_glibc217=no])
1215 AC_MSG_RESULT($glibcxx_glibc217)
1217 if test x"$glibcxx_glibc217" = x"yes"; then
1218 ac_has_clock_monotonic=yes
1219 ac_has_clock_realtime=yes
1221 ac_has_nanosleep=yes
1222 ac_has_sched_yield=yes
1224 freebsd*|netbsd*|dragonfly*)
1225 ac_has_clock_monotonic=yes
1226 ac_has_clock_realtime=yes
1227 ac_has_nanosleep=yes
1228 ac_has_sched_yield=yes
1231 ac_has_clock_monotonic=yes
1232 ac_has_clock_realtime=yes
1233 ac_has_nanosleep=yes
1236 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
1237 ac_has_clock_monotonic=yes
1238 ac_has_clock_realtime=yes
1239 ac_has_nanosleep=yes
1240 ac_has_sched_yield=yes
1244 elif test x"$enable_libstdcxx_time" != x"no"; then
1246 if test x"$enable_libstdcxx_time" = x"rt"; then
1247 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1248 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1250 AC_SEARCH_LIBS(clock_gettime, [posix4])
1251 AC_SEARCH_LIBS(nanosleep, [posix4])
1254 case "$ac_cv_search_clock_gettime" in
1255 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1258 case "$ac_cv_search_nanosleep" in
1259 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1263 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1265 case "$ac_cv_search_sched_yield" in
1267 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1268 ac_has_sched_yield=yes
1271 if test x"$enable_libstdcxx_time" = x"rt"; then
1272 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1273 ac_has_sched_yield=yes
1277 ac_has_sched_yield=yes
1281 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1283 if test x"$ac_has_unistd_h" = x"yes"; then
1284 AC_MSG_CHECKING([for monotonic clock])
1286 [#include <unistd.h>
1289 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1292 clock_gettime(CLOCK_MONOTONIC, &tp);
1293 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1295 AC_MSG_RESULT($ac_has_clock_monotonic)
1297 AC_MSG_CHECKING([for realtime clock])
1299 [#include <unistd.h>
1302 [#if _POSIX_TIMERS > 0
1305 clock_gettime(CLOCK_REALTIME, &tp);
1306 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1308 AC_MSG_RESULT($ac_has_clock_realtime)
1310 AC_MSG_CHECKING([for nanosleep])
1312 [#include <unistd.h>
1315 [#if _POSIX_TIMERS > 0
1319 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1321 AC_MSG_RESULT($ac_has_nanosleep)
1325 if test x"$ac_has_clock_monotonic" != x"yes"; then
1326 case ${target_os} in
1328 AC_MSG_CHECKING([for clock_gettime syscall])
1330 [#include <unistd.h>
1332 #include <sys/syscall.h>
1334 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1337 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1338 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1339 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
1340 AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
1341 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
1342 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1343 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1344 ac_has_clock_monotonic=yes
1345 ac_has_clock_realtime=yes
1350 if test x"$ac_has_clock_monotonic" = x"yes"; then
1351 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1352 [ Defined if clock_gettime has monotonic clock support. ])
1355 if test x"$ac_has_clock_realtime" = x"yes"; then
1356 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1357 [ Defined if clock_gettime has realtime clock support. ])
1360 if test x"$ac_has_sched_yield" = x"yes"; then
1361 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1362 [ Defined if sched_yield is available. ])
1365 if test x"$ac_has_nanosleep" = x"yes"; then
1366 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1367 [ Defined if nanosleep is available. ])
1369 AC_MSG_CHECKING([for sleep])
1370 AC_TRY_COMPILE([#include <unistd.h>],
1372 [ac_has_sleep=yes],[ac_has_sleep=no])
1373 if test x"$ac_has_sleep" = x"yes"; then
1374 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1376 AC_MSG_RESULT($ac_has_sleep)
1377 AC_MSG_CHECKING([for usleep])
1378 AC_TRY_COMPILE([#include <unistd.h>],
1381 [ac_has_usleep=yes],[ac_has_usleep=no])
1382 if test x"$ac_has_usleep" = x"yes"; then
1383 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1385 AC_MSG_RESULT($ac_has_usleep)
1388 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1389 AC_MSG_CHECKING([for Sleep])
1390 AC_TRY_COMPILE([#include <windows.h>],
1392 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1393 if test x"$ac_has_win32_sleep" = x"yes"; then
1394 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1396 AC_MSG_RESULT($ac_has_win32_sleep)
1399 AC_SUBST(GLIBCXX_LIBS)
1401 CXXFLAGS="$ac_save_CXXFLAGS"
1402 LIBS="$ac_save_LIBS"
1407 dnl Check for gettimeofday, used in the implementation of 20.11.7
1408 dnl [time.clock] in the C++11 standard.
1410 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1412 AC_MSG_CHECKING([for gettimeofday])
1416 ac_save_CXXFLAGS="$CXXFLAGS"
1417 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1419 ac_has_gettimeofday=no;
1420 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1421 if test x"$ac_has_sys_time_h" = x"yes"; then
1422 AC_MSG_CHECKING([for gettimeofday])
1423 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1424 [timeval tv; gettimeofday(&tv, 0);],
1425 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1427 AC_MSG_RESULT($ac_has_gettimeofday)
1430 if test x"$ac_has_gettimeofday" = x"yes"; then
1431 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1432 [ Defined if gettimeofday is available. ])
1435 CXXFLAGS="$ac_save_CXXFLAGS"
1440 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1441 dnl facilities in Chapter 8, "C compatibility".
1443 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1448 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1449 # undefined and fake C99 facilities may be spuriously enabled.
1450 ac_save_CXXFLAGS="$CXXFLAGS"
1451 CXXFLAGS="$CXXFLAGS -std=c++98"
1453 # Check for the existence of <complex.h> complex math functions used
1455 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1456 ac_c99_complex_tr1=no;
1457 if test x"$ac_has_complex_h" = x"yes"; then
1458 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1459 AC_TRY_COMPILE([#include <complex.h>],
1460 [typedef __complex__ float float_type; float_type tmpf;
1467 typedef __complex__ double double_type; double_type tmpd;
1474 typedef __complex__ long double ld_type; ld_type tmpld;
1481 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1483 AC_MSG_RESULT($ac_c99_complex_tr1)
1484 if test x"$ac_c99_complex_tr1" = x"yes"; then
1485 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1486 [Define if C99 functions in <complex.h> should be used in
1487 <tr1/complex>. Using compiler builtins for these functions
1488 requires corresponding C99 library functions to be present.])
1491 # Check for the existence of <ctype.h> functions.
1492 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1493 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1494 AC_TRY_COMPILE([#include <ctype.h>],
1498 ],[glibcxx_cv_c99_ctype_tr1=yes],
1499 [glibcxx_cv_c99_ctype_tr1=no])
1501 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1502 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1503 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1504 [Define if C99 functions in <ctype.h> should be imported in
1505 <tr1/cctype> in namespace std::tr1.])
1508 # Check for the existence of <fenv.h> functions.
1509 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1511 if test x"$ac_has_fenv_h" = x"yes"; then
1512 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1513 AC_TRY_COMPILE([#include <fenv.h>],
1518 ret = feclearexcept(except);
1519 ret = fegetexceptflag(pflag, except);
1520 ret = feraiseexcept(except);
1521 ret = fesetexceptflag(pflag, except);
1522 ret = fetestexcept(except);
1524 ret = fesetround(mode);
1525 ret = fegetenv(penv);
1526 ret = feholdexcept(penv);
1527 ret = fesetenv(penv);
1528 ret = feupdateenv(penv);
1529 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1531 AC_MSG_RESULT($ac_c99_fenv_tr1)
1532 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1533 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1534 [Define if C99 functions in <fenv.h> should be imported in
1535 <tr1/cfenv> in namespace std::tr1.])
1538 # Check for the existence of <stdint.h> types.
1539 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1540 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1541 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1542 #define __STDC_CONSTANT_MACROS
1543 #include <stdint.h>],
1544 [typedef int8_t my_int8_t;
1545 my_int8_t i8 = INT8_MIN;
1547 typedef int16_t my_int16_t;
1548 my_int16_t i16 = INT16_MIN;
1550 typedef int32_t my_int32_t;
1551 my_int32_t i32 = INT32_MIN;
1553 typedef int64_t my_int64_t;
1554 my_int64_t i64 = INT64_MIN;
1556 typedef int_fast8_t my_int_fast8_t;
1557 my_int_fast8_t if8 = INT_FAST8_MIN;
1558 if8 = INT_FAST8_MAX;
1559 typedef int_fast16_t my_int_fast16_t;
1560 my_int_fast16_t if16 = INT_FAST16_MIN;
1561 if16 = INT_FAST16_MAX;
1562 typedef int_fast32_t my_int_fast32_t;
1563 my_int_fast32_t if32 = INT_FAST32_MIN;
1564 if32 = INT_FAST32_MAX;
1565 typedef int_fast64_t my_int_fast64_t;
1566 my_int_fast64_t if64 = INT_FAST64_MIN;
1567 if64 = INT_FAST64_MAX;
1568 typedef int_least8_t my_int_least8_t;
1569 my_int_least8_t il8 = INT_LEAST8_MIN;
1570 il8 = INT_LEAST8_MAX;
1571 typedef int_least16_t my_int_least16_t;
1572 my_int_least16_t il16 = INT_LEAST16_MIN;
1573 il16 = INT_LEAST16_MAX;
1574 typedef int_least32_t my_int_least32_t;
1575 my_int_least32_t il32 = INT_LEAST32_MIN;
1576 il32 = INT_LEAST32_MAX;
1577 typedef int_least64_t my_int_least64_t;
1578 my_int_least64_t il64 = INT_LEAST64_MIN;
1579 il64 = INT_LEAST64_MAX;
1580 typedef intmax_t my_intmax_t;
1581 my_intmax_t im = INTMAX_MAX;
1583 typedef intptr_t my_intptr_t;
1584 my_intptr_t ip = INTPTR_MAX;
1586 typedef uint8_t my_uint8_t;
1587 my_uint8_t ui8 = UINT8_MAX;
1589 typedef uint16_t my_uint16_t;
1590 my_uint16_t ui16 = UINT16_MAX;
1592 typedef uint32_t my_uint32_t;
1593 my_uint32_t ui32 = UINT32_MAX;
1595 typedef uint64_t my_uint64_t;
1596 my_uint64_t ui64 = UINT64_MAX;
1598 typedef uint_fast8_t my_uint_fast8_t;
1599 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1600 uif8 = UINT_FAST8_MAX;
1601 typedef uint_fast16_t my_uint_fast16_t;
1602 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1603 uif16 = UINT_FAST16_MAX;
1604 typedef uint_fast32_t my_uint_fast32_t;
1605 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1606 uif32 = UINT_FAST32_MAX;
1607 typedef uint_fast64_t my_uint_fast64_t;
1608 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1609 uif64 = UINT_FAST64_MAX;
1610 typedef uint_least8_t my_uint_least8_t;
1611 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1612 uil8 = UINT_LEAST8_MAX;
1613 typedef uint_least16_t my_uint_least16_t;
1614 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1615 uil16 = UINT_LEAST16_MAX;
1616 typedef uint_least32_t my_uint_least32_t;
1617 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1618 uil32 = UINT_LEAST32_MAX;
1619 typedef uint_least64_t my_uint_least64_t;
1620 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1621 uil64 = UINT_LEAST64_MAX;
1622 typedef uintmax_t my_uintmax_t;
1623 my_uintmax_t uim = UINTMAX_MAX;
1625 typedef uintptr_t my_uintptr_t;
1626 my_uintptr_t uip = UINTPTR_MAX;
1628 ],[glibcxx_cv_c99_stdint_tr1=yes],
1629 [glibcxx_cv_c99_stdint_tr1=no])
1631 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1632 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1633 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1634 [Define if C99 types in <stdint.h> should be imported in
1635 <tr1/cstdint> in namespace std::tr1.])
1638 # Check for the existence of <math.h> functions.
1639 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1640 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1641 AC_TRY_COMPILE([#include <math.h>],
1642 [typedef double_t my_double_t;
1643 typedef float_t my_float_t;
1657 copysignf(0.0f, 0.0f);
1658 copysignl(0.0l, 0.0l);
1675 fmaf(0.0f, 0.0f, 0.0f);
1676 fmal(0.0l, 0.0l, 0.0l);
1719 nextafter(0.0, 0.0);
1720 nextafterf(0.0f, 0.0f);
1721 nextafterl(0.0l, 0.0l);
1722 nexttoward(0.0, 0.0);
1723 nexttowardf(0.0f, 0.0f);
1724 nexttowardl(0.0l, 0.0l);
1725 remainder(0.0, 0.0);
1726 remainderf(0.0f, 0.0f);
1727 remainderl(0.0l, 0.0l);
1728 remquo(0.0, 0.0, 0);
1729 remquof(0.0f, 0.0f, 0);
1730 remquol(0.0l, 0.0l, 0);
1749 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1751 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1752 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1753 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1754 [Define if C99 functions or macros in <math.h> should be imported
1755 in <tr1/cmath> in namespace std::tr1.])
1758 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1759 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1760 ac_c99_inttypes_tr1=no;
1761 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1762 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1763 AC_TRY_COMPILE([#include <inttypes.h>],
1764 [intmax_t i, numer, denom, base;
1767 intmax_t ret = imaxabs(i);
1768 imaxdiv_t dret = imaxdiv(numer, denom);
1769 ret = strtoimax(s, endptr, base);
1770 uintmax_t uret = strtoumax(s, endptr, base);
1771 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1773 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1774 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1775 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1776 [Define if C99 functions in <inttypes.h> should be imported in
1777 <tr1/cinttypes> in namespace std::tr1.])
1780 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
1781 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1782 ac_c99_inttypes_wchar_t_tr1=no;
1783 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1784 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1785 AC_TRY_COMPILE([#include <inttypes.h>],
1789 intmax_t ret = wcstoimax(s, endptr, base);
1790 uintmax_t uret = wcstoumax(s, endptr, base);
1791 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1792 [ac_c99_inttypes_wchar_t_tr1=no])
1794 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1795 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1796 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1797 [Define if wchar_t C99 functions in <inttypes.h> should be
1798 imported in <tr1/cinttypes> in namespace std::tr1.])
1801 # Check for the existence of the <stdbool.h> header.
1802 AC_CHECK_HEADERS(stdbool.h)
1804 # Check for the existence of the <stdalign.h> header.
1805 AC_CHECK_HEADERS(stdalign.h)
1807 CXXFLAGS="$ac_save_CXXFLAGS"
1812 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1813 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1815 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1817 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1818 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1819 if test -r /dev/random && test -r /dev/urandom; then
1820 ## For MSys environment the test above is detect as false-positive
1821 ## on mingw-targets. So disable it explicit for them.
1822 case ${target_os} in
1823 *mingw*) glibcxx_cv_random_tr1=no ;;
1824 *) glibcxx_cv_random_tr1=yes ;;
1827 glibcxx_cv_random_tr1=no;
1830 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1832 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1833 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1834 [Define if /dev/random and /dev/urandom are available for
1835 the random_device of TR1 (Chapter 5.1).])
1841 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
1843 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
1845 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
1846 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
1847 [#include <stdio.h>],
1848 [AC_MSG_ERROR([computing EOF failed])])
1850 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
1851 [Define to the value of the EOF integer constant.])
1853 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
1854 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
1855 [#include <stdio.h>],
1856 [AC_MSG_ERROR([computing SEEK_CUR failed])])
1858 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
1859 [Define to the value of the SEEK_CUR integer constant.])
1861 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
1862 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
1863 [#include <stdio.h>],
1864 [AC_MSG_ERROR([computing SEEK_END failed])])
1866 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
1867 [Define to the value of the SEEK_END integer constant.])
1871 dnl Check whether required C++ overloads are present in <stdio.h>.
1873 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
1878 AC_MSG_CHECKING([for gets declaration])
1879 AC_CACHE_VAL(glibcxx_cv_gets, [
1880 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1887 [glibcxx_cv_gets=yes],
1888 [glibcxx_cv_gets=no]
1891 if test $glibcxx_cv_gets = yes; then
1892 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
1894 AC_MSG_RESULT($glibcxx_cv_gets)
1900 dnl Check whether macros, etc are present for <system_error>
1902 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1904 m4_pushdef([n_syserr], [1])dnl
1905 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1906 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1907 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
1908 ECHILD, ENOSPC, EPERM,
1909 ETIMEDOUT, EWOULDBLOCK],
1910 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1911 AC_MSG_CHECKING([for syserr])
1912 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1913 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1914 [int i = syserr;])],
1915 [glibcxx_cv_system_error[]n_syserr=yes],
1916 [glibcxx_cv_system_error[]n_syserr=no])
1918 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1919 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1920 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1922 m4_define([n_syserr], m4_incr(n_syserr))dnl
1923 m4_popdef([SYSERR])dnl
1925 m4_popdef([n_syserr])dnl
1929 dnl Check for what type of C headers to use.
1931 dnl --enable-cheaders= [does stuff].
1932 dnl --disable-cheaders [does not do anything, really].
1933 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1934 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1936 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1937 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
1938 [construct "C" headers for g++], [permit c|c_std|c_global])
1939 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1941 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1943 # Allow overrides to configure.host here.
1944 if test $enable_cheaders = c_global; then
1948 AC_SUBST(C_INCLUDE_DIR)
1949 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1950 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1951 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1952 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1957 dnl Check for which locale library to use. The choice is mapped to
1958 dnl a subdirectory of config/locale.
1960 dnl Default is generic.
1962 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1963 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
1964 [use MODEL for target locale package],
1965 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
1967 # Deal with gettext issues. Default to not using it (=no) until we detect
1968 # support for it later. Let the user turn it off via --e/d, but let that
1969 # default to on for easier handling.
1972 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1976 # Either a known package, or "auto"
1977 if test $enable_clocale = no || test $enable_clocale = yes; then
1980 enable_clocale_flag=$enable_clocale
1982 # Probe for locale model to use if none specified.
1983 # Default to "generic".
1984 if test $enable_clocale_flag = auto; then
1985 case ${target_os} in
1986 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1987 enable_clocale_flag=gnu
1990 enable_clocale_flag=darwin
1993 enable_clocale_flag=dragonfly
1996 enable_clocale_flag=newlib
1999 if test x"$with_newlib" = x"yes"; then
2000 enable_clocale_flag=newlib
2002 enable_clocale_flag=generic
2008 # Sanity check model, and test for special functionality.
2009 if test $enable_clocale_flag = gnu; then
2010 AC_EGREP_CPP([_GLIBCXX_ok], [
2011 #include <features.h>
2012 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2015 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2017 # Set it to scream when it hurts.
2018 ac_save_CFLAGS="$CFLAGS"
2019 CFLAGS="-Wimplicit-function-declaration -Werror"
2021 # Use strxfrm_l if available.
2022 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2024 #include <locale.h>],
2025 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2026 AC_DEFINE(HAVE_STRXFRM_L, 1,
2027 [Define if strxfrm_l is available in <string.h>.]),)
2029 # Use strerror_l if available.
2030 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2032 #include <locale.h>],
2033 [__locale_t loc; strerror_l(5, loc);],
2034 AC_DEFINE(HAVE_STRERROR_L, 1,
2035 [Define if strerror_l is available in <string.h>.]),)
2037 CFLAGS="$ac_save_CFLAGS"
2040 # Perhaps use strerror_r if available, and strerror_l isn't.
2041 ac_save_CFLAGS="$CFLAGS"
2042 CFLAGS="-Wimplicit-function-declaration -Werror"
2043 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2045 #include <locale.h>],
2046 [char s[128]; strerror_r(5, s, 128);],
2047 AC_DEFINE(HAVE_STRERROR_R, 1,
2048 [Define if strerror_r is available in <string.h>.]),)
2049 CFLAGS="$ac_save_CFLAGS"
2051 # Set configure bits for specified locale package
2052 AC_MSG_CHECKING([for C locale to use])
2053 case ${enable_clocale_flag} in
2055 AC_MSG_RESULT(generic)
2057 CLOCALE_H=config/locale/generic/c_locale.h
2058 CLOCALE_CC=config/locale/generic/c_locale.cc
2059 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2060 CCOLLATE_CC=config/locale/generic/collate_members.cc
2061 CCTYPE_CC=config/locale/generic/ctype_members.cc
2062 CMESSAGES_H=config/locale/generic/messages_members.h
2063 CMESSAGES_CC=config/locale/generic/messages_members.cc
2064 CMONEY_CC=config/locale/generic/monetary_members.cc
2065 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2066 CTIME_H=config/locale/generic/time_members.h
2067 CTIME_CC=config/locale/generic/time_members.cc
2068 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2071 AC_MSG_RESULT(darwin or freebsd)
2073 CLOCALE_H=config/locale/generic/c_locale.h
2074 CLOCALE_CC=config/locale/generic/c_locale.cc
2075 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2076 CCOLLATE_CC=config/locale/generic/collate_members.cc
2077 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2078 CMESSAGES_H=config/locale/generic/messages_members.h
2079 CMESSAGES_CC=config/locale/generic/messages_members.cc
2080 CMONEY_CC=config/locale/generic/monetary_members.cc
2081 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2082 CTIME_H=config/locale/generic/time_members.h
2083 CTIME_CC=config/locale/generic/time_members.cc
2084 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2088 AC_MSG_RESULT(dragonfly)
2090 CLOCALE_H=config/locale/generic/c_locale.h
2091 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2092 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2093 CCOLLATE_CC=config/locale/generic/collate_members.cc
2094 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2095 CMESSAGES_H=config/locale/generic/messages_members.h
2096 CMESSAGES_CC=config/locale/generic/messages_members.cc
2097 CMONEY_CC=config/locale/generic/monetary_members.cc
2098 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2099 CTIME_H=config/locale/generic/time_members.h
2100 CTIME_CC=config/locale/generic/time_members.cc
2101 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2107 # Declare intention to use gettext, and add support for specific
2109 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2112 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2113 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2114 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2117 # Export the build objects.
2118 for ling in $ALL_LINGUAS; do \
2119 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2120 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2122 AC_SUBST(glibcxx_MOFILES)
2123 AC_SUBST(glibcxx_POFILES)
2125 CLOCALE_H=config/locale/gnu/c_locale.h
2126 CLOCALE_CC=config/locale/gnu/c_locale.cc
2127 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2128 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2129 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2130 CMESSAGES_H=config/locale/gnu/messages_members.h
2131 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2132 CMONEY_CC=config/locale/gnu/monetary_members.cc
2133 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2134 CTIME_H=config/locale/gnu/time_members.h
2135 CTIME_CC=config/locale/gnu/time_members.cc
2136 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2139 AC_MSG_RESULT(IEEE 1003.1)
2141 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2142 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2143 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2144 CCOLLATE_CC=config/locale/generic/collate_members.cc
2145 CCTYPE_CC=config/locale/generic/ctype_members.cc
2146 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2147 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2148 CMONEY_CC=config/locale/generic/monetary_members.cc
2149 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2150 CTIME_H=config/locale/generic/time_members.h
2151 CTIME_CC=config/locale/generic/time_members.cc
2152 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2155 AC_MSG_RESULT(newlib)
2157 CLOCALE_H=config/locale/generic/c_locale.h
2158 CLOCALE_CC=config/locale/generic/c_locale.cc
2159 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2160 CCOLLATE_CC=config/locale/generic/collate_members.cc
2161 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2162 CMESSAGES_H=config/locale/generic/messages_members.h
2163 CMESSAGES_CC=config/locale/generic/messages_members.cc
2164 CMONEY_CC=config/locale/generic/monetary_members.cc
2165 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2166 CTIME_H=config/locale/generic/time_members.h
2167 CTIME_CC=config/locale/generic/time_members.cc
2168 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2172 # This is where the testsuite looks for locale catalogs, using the
2173 # -DLOCALEDIR define during testsuite compilation.
2174 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2175 AC_SUBST(glibcxx_localedir)
2177 # A standalone libintl (e.g., GNU libintl) may be in use.
2178 if test $USE_NLS = yes; then
2179 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2180 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2182 if test $USE_NLS = yes; then
2183 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2184 [Define if NLS translations are to be used.])
2189 AC_SUBST(CMESSAGES_H)
2190 AC_SUBST(CCODECVT_CC)
2191 AC_SUBST(CCOLLATE_CC)
2193 AC_SUBST(CMESSAGES_CC)
2195 AC_SUBST(CNUMERIC_CC)
2198 AC_SUBST(CLOCALE_CC)
2199 AC_SUBST(CLOCALE_INTERNAL_H)
2204 dnl Check for which std::allocator base class to use. The choice is
2205 dnl mapped from a subdirectory of include/ext.
2209 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2210 AC_MSG_CHECKING([for std::allocator base class])
2211 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2212 [use KIND for target std::allocator base],
2213 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2215 # If they didn't use this option switch, or if they specified --enable
2216 # with no specific model, we'll have to look for one. If they
2217 # specified --disable (???), do likewise.
2218 if test $enable_libstdcxx_allocator = no ||
2219 test $enable_libstdcxx_allocator = yes;
2221 enable_libstdcxx_allocator=auto
2224 # Either a known package, or "auto". Auto implies the default choice
2225 # for a particular platform.
2226 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2228 # Probe for host-specific support if no specific model is specified.
2230 if test $enable_libstdcxx_allocator_flag = auto; then
2231 case ${target_os} in
2232 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2233 enable_libstdcxx_allocator_flag=new
2236 enable_libstdcxx_allocator_flag=new
2240 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2243 # Set configure bits for specified locale package
2244 case ${enable_libstdcxx_allocator_flag} in
2246 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2247 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2250 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2251 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2254 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2255 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2258 ALLOCATOR_H=config/allocator/new_allocator_base.h
2259 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2262 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2263 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2267 AC_SUBST(ALLOCATOR_H)
2268 AC_SUBST(ALLOCATOR_NAME)
2273 dnl Check for whether the Boost-derived checks should be turned on.
2275 dnl --enable-concept-checks turns them on.
2276 dnl --disable-concept-checks leaves them off.
2277 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2278 dnl Where DEFAULT is either `yes' or `no'.
2280 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2281 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2282 if test $enable_concept_checks = yes; then
2283 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2284 [Define to use concept checking code from the boost libraries.])
2289 dnl Use extern templates.
2291 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2292 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2294 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2295 dnl Where DEFAULT is `yes' or `no'.
2297 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2299 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2301 AC_MSG_CHECKING([for extern template support])
2302 AC_MSG_RESULT([$enable_extern_template])
2304 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2308 dnl Use vtable verification.
2310 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2311 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2313 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2314 dnl Where DEFAULT is `yes' or `no'.
2316 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2318 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2320 AC_MSG_CHECKING([for vtable verify support])
2321 AC_MSG_RESULT([$enable_vtable_verify])
2324 if test $enable_vtable_verify = yes; then
2325 case ${target_os} in
2327 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2331 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2334 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2335 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2342 AC_SUBST(VTV_CXXFLAGS)
2343 AC_SUBST(VTV_PCH_CXXFLAGS)
2344 AC_SUBST(VTV_CXXLINKFLAGS)
2345 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2346 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2350 dnl Check for parallel mode pre-requisites, including OpenMP support.
2352 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2354 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2358 # See if configured libgomp/omp.h exists. (libgomp may be in
2359 # noconfigdirs but not explicitly disabled.)
2360 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2361 enable_parallel=yes;
2363 AC_MSG_NOTICE([target-libgomp not built])
2366 AC_MSG_CHECKING([for parallel mode support])
2367 AC_MSG_RESULT([$enable_parallel])
2372 dnl Check for which I/O library to use: stdio, or something specific.
2374 dnl Default is stdio.
2376 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2377 AC_MSG_CHECKING([for underlying I/O to use])
2378 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2379 [use target-specific I/O package], [permit stdio])
2381 # Now that libio has been removed, you can have any color you want as long
2382 # as it's black. This is one big no-op until other packages are added, but
2383 # showing the framework never hurts.
2384 case ${enable_cstdio} in
2386 CSTDIO_H=config/io/c_io_stdio.h
2387 BASIC_FILE_H=config/io/basic_file_stdio.h
2388 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2389 AC_MSG_RESULT(stdio)
2394 AC_SUBST(BASIC_FILE_H)
2395 AC_SUBST(BASIC_FILE_CC)
2400 dnl Check for "unusual" flags to pass to the compiler while building.
2402 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2403 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2404 dnl --disable-cxx-flags passes nothing.
2405 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2406 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2407 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2408 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2409 dnl If "default flags" is an empty string, the effect is the same
2410 dnl as --disable or --enable=no.
2412 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2413 AC_MSG_CHECKING([for extra compiler flags for building])
2414 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2415 [pass compiler FLAGS when building library],
2416 [case "x$enable_cxx_flags" in
2417 xno | x) enable_cxx_flags= ;;
2419 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2422 # Run through flags (either default or command-line) and set anything
2423 # extra (e.g., #defines) that must accompany particular g++ options.
2424 if test -n "$enable_cxx_flags"; then
2425 for f in $enable_cxx_flags; do
2429 *) # and we're trying to pass /what/ exactly?
2430 AC_MSG_ERROR([compiler flags start with a -]) ;;
2435 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2436 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2437 AC_SUBST(EXTRA_CXX_FLAGS)
2442 dnl Check to see if debugging libraries are to be built.
2444 dnl --enable-libstdcxx-debug
2445 dnl builds a separate set of debugging libraries in addition to the
2446 dnl normal (shared, static) libstdc++ binaries.
2448 dnl --disable-libstdcxx-debug
2449 dnl builds only one (non-debug) version of libstdc++.
2451 dnl --enable-libstdcxx-debug-flags=FLAGS
2452 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2454 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2455 dnl Where DEFAULT is either `yes' or `no'.
2457 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2458 AC_MSG_CHECKING([for additional debug build])
2459 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2460 AC_MSG_RESULT($enable_libstdcxx_debug)
2461 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2466 dnl Check for explicit debug flags.
2468 dnl --enable-libstdcxx-debug-flags='-O1'
2469 dnl is a general method for passing flags to be used when
2470 dnl building debug libraries with --enable-debug.
2472 dnl --disable-libstdcxx-debug-flags does nothing.
2473 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2474 dnl If "default flags" is an empty string, the effect is the same
2475 dnl as --disable or --enable=no.
2477 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2478 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2479 [pass compiler FLAGS when building debug library],
2480 [case "x$enable_libstdcxx_debug_flags" in
2481 xno | x) enable_libstdcxx_debug_flags= ;;
2483 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2486 # Option parsed, now set things appropriately
2487 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2488 AC_SUBST(DEBUG_FLAGS)
2490 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2495 dnl Check if the user only wants a freestanding library implementation.
2497 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2498 dnl installing only the headers required by [17.4.1.3] and the language
2499 dnl support library. More than that will be built (to keep the Makefiles
2500 dnl conveniently clean), but not installed.
2503 dnl is_hosted (yes/no)
2506 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2508 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2509 AC_ARG_ENABLE([hosted-libstdcxx],
2510 AC_HELP_STRING([--disable-hosted-libstdcxx],
2511 [only build freestanding C++ runtime support]),,
2514 enable_hosted_libstdcxx=no
2517 enable_hosted_libstdcxx=yes
2520 if test "$enable_hosted_libstdcxx" = no; then
2521 AC_MSG_NOTICE([Only freestanding libraries will be built])
2525 enable_libstdcxx_pch=no
2530 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2531 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2532 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2537 dnl Check if the user wants a non-verbose library implementation.
2539 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2540 dnl standard error on termination.
2543 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2545 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2546 AC_ARG_ENABLE([libstdcxx-verbose],
2547 AC_HELP_STRING([--disable-libstdcxx-verbose],
2548 [disable termination messages to standard error]),,
2549 [enable_libstdcxx_verbose=yes])
2550 if test x"$enable_libstdcxx_verbose" = xyes; then
2553 AC_MSG_NOTICE([verbose termination messages are disabled])
2556 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2557 [Define to 1 if a verbose library is built, or 0 otherwise.])
2562 dnl Check for template specializations for the 'long long' type.
2563 dnl The result determines only whether 'long long' I/O is enabled; things
2564 dnl like numeric_limits<> specializations are always available.
2566 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2567 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2568 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2569 dnl Where DEFAULT is either `yes' or `no'.
2571 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2572 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2573 if test $enable_long_long = yes; then
2574 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2575 [Define if code specialized for long long should be used.])
2577 AC_MSG_CHECKING([for enabled long long specializations])
2578 AC_MSG_RESULT([$enable_long_long])
2583 dnl Check for decimal floating point.
2585 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2587 dnl This checks to see if the host supports decimal floating point types.
2590 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2592 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2594 # Fake what AC_TRY_COMPILE does, without linking as this is
2595 # unnecessary for this test.
2597 cat > conftest.$ac_ext << EOF
2598 [#]line __oline__ "configure"
2608 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2609 if AC_TRY_EVAL(ac_compile); then
2610 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2611 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2616 AC_MSG_RESULT($enable_dfp)
2621 dnl Check for GNU 128-bit integer and floating point types.
2623 dnl Note: also checks that the types aren't standard types.
2626 dnl _GLIBCXX_USE_INT128
2627 dnl _GLIBCXX_USE_FLOAT128
2629 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2634 # Fake what AC_TRY_COMPILE does, without linking as this is
2635 # unnecessary for this test.
2637 cat > conftest.$ac_ext << EOF
2638 [#]line __oline__ "configure"
2639 template<typename T1, typename T2>
2641 { typedef T2 type; };
2643 template<typename T>
2648 typename same<long, __int128>::type i1;
2649 typename same<long long, __int128>::type i2;
2653 AC_MSG_CHECKING([for __int128])
2654 if AC_TRY_EVAL(ac_compile); then
2655 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2656 [Define if __int128 is supported on this host.])
2661 AC_MSG_RESULT($enable_int128)
2664 cat > conftest.$ac_ext << EOF
2665 [#]line __oline__ "configure"
2666 template<typename T1, typename T2>
2668 { typedef T2 type; };
2670 template<typename T>
2675 typename same<double, __float128>::type f1;
2676 typename same<long double, __float128>::type f2;
2680 AC_MSG_CHECKING([for __float128])
2681 if AC_TRY_EVAL(ac_compile); then
2682 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
2683 [Define if __float128 is supported on this host.])
2688 AC_MSG_RESULT($enable_float128)
2695 dnl Check for template specializations for the 'wchar_t' type.
2697 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2698 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2699 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2700 dnl Where DEFAULT is either `yes' or `no'.
2702 dnl Necessary support must also be present.
2704 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2705 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2707 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2708 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2709 AC_MSG_CHECKING([for mbstate_t])
2710 AC_TRY_COMPILE([#include <wchar.h>],
2711 [mbstate_t teststate;],
2712 have_mbstate_t=yes, have_mbstate_t=no)
2713 AC_MSG_RESULT($have_mbstate_t)
2714 if test x"$have_mbstate_t" = xyes; then
2715 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2718 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2720 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2722 if test x"$enable_wchar_t" = x"yes"; then
2727 if test x"$ac_has_wchar_h" = xyes &&
2728 test x"$ac_has_wctype_h" = xyes; then
2729 AC_TRY_COMPILE([#include <wchar.h>
2790 ],[],[], [enable_wchar_t=no])
2798 if test x"$enable_wchar_t" = x"yes"; then
2799 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2800 [Define if code specialized for wchar_t should be used.])
2803 AC_MSG_CHECKING([for enabled wchar_t specializations])
2804 AC_MSG_RESULT([$enable_wchar_t])
2809 dnl Check to see if building and using a C++ precompiled header can be done.
2811 dnl --enable-libstdcxx-pch=yes
2812 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2813 dnl may work, after some light-hearted attempts to puzzle out compiler
2814 dnl support, flip bits on in include/Makefile.am
2816 dnl --disable-libstdcxx-pch
2817 dnl turns off attempts to use or build stdc++.h.gch.
2820 dnl glibcxx_PCHFLAGS
2822 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2823 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2824 if test $enable_libstdcxx_pch = yes; then
2825 AC_CACHE_CHECK([for compiler with PCH support],
2826 [glibcxx_cv_prog_CXX_pch],
2827 [ac_save_CXXFLAGS="$CXXFLAGS"
2828 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2831 echo '#include <math.h>' > conftest.h
2832 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2833 -o conftest.h.gch 1>&5 2>&1 &&
2834 echo '#error "pch failed"' > conftest.h &&
2835 echo '#include "conftest.h"' > conftest.cc &&
2836 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2838 glibcxx_cv_prog_CXX_pch=yes
2840 glibcxx_cv_prog_CXX_pch=no
2843 CXXFLAGS=$ac_save_CXXFLAGS
2846 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2849 AC_MSG_CHECKING([for enabled PCH])
2850 AC_MSG_RESULT([$enable_libstdcxx_pch])
2852 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2853 if test $enable_libstdcxx_pch = yes; then
2854 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2858 AC_SUBST(glibcxx_PCHFLAGS)
2863 dnl Check for atomic builtins.
2865 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
2867 dnl This checks to see if the host supports the compiler-generated
2868 dnl builtins for atomic operations for various integral sizes. Note, this
2869 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2870 dnl that are used should be checked.
2873 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
2875 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2878 old_CXXFLAGS="$CXXFLAGS"
2880 # Do link tests if possible, instead asm tests, limited to some platforms
2881 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
2882 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
2883 atomic_builtins_link_tests=no
2884 if test x$gcc_no_link != xyes; then
2885 # Can do link tests. Limit to some tested platforms
2887 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
2888 atomic_builtins_link_tests=yes
2893 if test x$atomic_builtins_link_tests = xyes; then
2897 CXXFLAGS="$CXXFLAGS -fno-exceptions"
2899 AC_MSG_CHECKING([for atomic builtins for bool])
2900 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
2903 [typedef bool atomic_type;
2907 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2908 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2910 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2911 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2913 [glibcxx_cv_atomic_bool=yes],
2914 [glibcxx_cv_atomic_bool=no])
2916 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2918 AC_MSG_CHECKING([for atomic builtins for short])
2919 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
2922 [typedef short atomic_type;
2926 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2927 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2929 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2930 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2932 [glibcxx_cv_atomic_short=yes],
2933 [glibcxx_cv_atomic_short=no])
2935 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2937 AC_MSG_CHECKING([for atomic builtins for int])
2938 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
2941 [typedef int atomic_type;
2945 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2946 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2948 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2949 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2951 [glibcxx_cv_atomic_int=yes],
2952 [glibcxx_cv_atomic_int=no])
2954 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2956 AC_MSG_CHECKING([for atomic builtins for long long])
2957 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
2960 [typedef long long atomic_type;
2964 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2965 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2967 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2968 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2970 [glibcxx_cv_atomic_long_long=yes],
2971 [glibcxx_cv_atomic_long_long=no])
2973 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2979 # Compile unoptimized.
2982 # Fake what AC_TRY_COMPILE does.
2984 cat > conftest.$ac_ext << EOF
2985 [#]line __oline__ "configure"
2988 typedef bool atomic_type;
2992 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2993 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2995 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2996 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3002 AC_MSG_CHECKING([for atomic builtins for bool])
3003 if AC_TRY_EVAL(ac_compile); then
3004 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3005 glibcxx_cv_atomic_bool=no
3007 glibcxx_cv_atomic_bool=yes
3010 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3013 cat > conftest.$ac_ext << EOF
3014 [#]line __oline__ "configure"
3017 typedef short atomic_type;
3021 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3022 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3024 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3025 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3031 AC_MSG_CHECKING([for atomic builtins for short])
3032 if AC_TRY_EVAL(ac_compile); then
3033 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3034 glibcxx_cv_atomic_short=no
3036 glibcxx_cv_atomic_short=yes
3039 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3042 cat > conftest.$ac_ext << EOF
3043 [#]line __oline__ "configure"
3046 // NB: _Atomic_word not necessarily int.
3047 typedef int atomic_type;
3051 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3052 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3054 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3055 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3061 AC_MSG_CHECKING([for atomic builtins for int])
3062 if AC_TRY_EVAL(ac_compile); then
3063 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3064 glibcxx_cv_atomic_int=no
3066 glibcxx_cv_atomic_int=yes
3069 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3072 cat > conftest.$ac_ext << EOF
3073 [#]line __oline__ "configure"
3076 typedef long long atomic_type;
3080 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3081 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3083 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3084 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3090 AC_MSG_CHECKING([for atomic builtins for long long])
3091 if AC_TRY_EVAL(ac_compile); then
3092 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3093 glibcxx_cv_atomic_long_long=no
3095 glibcxx_cv_atomic_long_long=yes
3098 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3103 CXXFLAGS="$old_CXXFLAGS"
3106 # Set atomicity_dir to builtins if all but the long long test above passes.
3107 if test $glibcxx_cv_atomic_bool = yes \
3108 && test $glibcxx_cv_atomic_short = yes \
3109 && test $glibcxx_cv_atomic_int = yes; then
3110 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3111 [Define if the compiler supports C++11 atomics.])
3112 atomicity_dir=cpu/generic/atomicity_builtins
3115 # If still generic, set to mutex.
3116 if test $atomicity_dir = "cpu/generic" ; then
3117 atomicity_dir=cpu/generic/atomicity_mutex
3118 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3119 if test "x$target_thread_file" = xsingle; then
3120 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3121 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3123 AC_MSG_WARN([They will be faked using a mutex.])
3124 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3132 dnl Check for exception handling support. If an explicit enable/disable
3133 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
3134 dnl target may or may not support call frame exceptions.
3136 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
3137 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
3138 dnl Neither one forces an attempt at detection.
3141 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
3143 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
3144 AC_MSG_CHECKING([for exception model to use])
3147 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
3148 [force use of builtin_setjmp for exceptions],
3149 [permit yes|no|auto])
3151 if test $enable_sjlj_exceptions = auto; then
3152 # Botheration. Now we've got to detect the exception model. Link tests
3153 # against libgcc.a are problematic since we've not been given proper -L
3154 # bits for single-tree newlib and libgloss.
3156 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
3157 cat > conftest.$ac_ext << EOF
3158 [#]line __oline__ "configure"
3167 old_CXXFLAGS="$CXXFLAGS"
3169 if AC_TRY_EVAL(ac_compile); then
3170 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
3171 enable_sjlj_exceptions=yes
3172 elif grep _Unwind_SjLj_Register conftest.s >/dev/null 2>&1 ; then
3173 enable_sjlj_exceptions=yes
3174 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
3175 enable_sjlj_exceptions=no
3176 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
3177 enable_sjlj_exceptions=no
3180 CXXFLAGS="$old_CXXFLAGS"
3184 # This is a tad weird, for hysterical raisins. We have to map
3185 # enable/disable to two different models.
3186 case $enable_sjlj_exceptions in
3188 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
3189 [Define if the compiler is configured for setjmp/longjmp exceptions.])
3190 ac_exception_model_name=sjlj
3193 ac_exception_model_name="call frame"
3196 AC_MSG_ERROR([unable to detect exception model])
3200 AC_MSG_RESULT($ac_exception_model_name)
3205 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3207 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3208 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3209 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3210 dnl Where DEFAULT is 'yes'.
3212 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3213 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3215 if test x$enable_libstdcxx_visibility = xyes ; then
3216 dnl all hail libgfortran
3217 dnl Check whether the target supports hidden visibility.
3218 AC_CACHE_CHECK([whether the target supports hidden visibility],
3219 glibcxx_cv_have_attribute_visibility, [
3220 save_CFLAGS="$CFLAGS"
3221 CFLAGS="$CFLAGS -Werror"
3222 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3223 [], glibcxx_cv_have_attribute_visibility=yes,
3224 glibcxx_cv_have_attribute_visibility=no)
3225 CFLAGS="$save_CFLAGS"])
3226 if test $glibcxx_cv_have_attribute_visibility = no; then
3227 enable_libstdcxx_visibility=no
3231 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3232 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3237 dnl Add version tags to symbols in shared library (or not), additionally
3238 dnl marking other symbols as private/local (or not).
3240 dnl Sets libtool_VERSION, and determines shared library SONAME.
3242 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3244 dnl --enable-symvers=style adds a version script to the linker call when
3245 dnl creating the shared library. The choice of version script is
3246 dnl controlled by 'style'.
3247 dnl --disable-symvers does not.
3249 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3250 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3251 dnl choose a default style based on linker characteristics. Passing
3252 dnl 'no' disables versioning.
3254 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3256 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3257 [enables symbol versioning of the shared library],
3258 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3260 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3261 # don't know enough about $LD to do tricks...
3262 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3263 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3264 # with extern "C++" in version scripts.
3265 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3267 # Turn a 'yes' into a suitable default.
3268 if test x$enable_symvers = xyes ; then
3269 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3272 if test $with_gnu_ld = yes ; then
3273 case ${target_os} in
3275 enable_symvers=no ;;
3277 enable_symvers=gnu ;;
3280 case ${target_os} in
3282 enable_symvers=darwin ;;
3283 # Sun symbol versioning exists since Solaris 2.5.
3284 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3285 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3286 # version scripts, so disable symbol versioning if none can be
3288 if test -z "$ac_cv_path_CXXFILT"; then
3289 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3290 AC_MSG_WARN([=== no GNU c++filt could be found.])
3291 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3298 enable_symvers=no ;;
3304 # Check to see if 'darwin' or 'darwin-export' can win.
3305 if test x$enable_symvers = xdarwin-export ; then
3306 enable_symvers=darwin
3309 # Check if 'sun' was requested on non-Solaris 2 platforms.
3310 if test x$enable_symvers = xsun ; then
3311 case ${target_os} in
3317 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3318 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3319 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3325 # Check to see if 'gnu' can win.
3326 if test $enable_symvers = gnu ||
3327 test $enable_symvers = gnu-versioned-namespace ||
3328 test $enable_symvers = sun; then
3329 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3330 AC_MSG_CHECKING([for shared libgcc])
3331 ac_save_CFLAGS="$CFLAGS"
3333 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3334 CFLAGS="$ac_save_CFLAGS"
3335 if test $glibcxx_shared_libgcc = no; then
3336 cat > conftest.c <<EOF
3337 int main (void) { return 0; }
3340 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3341 -shared -shared-libgcc -o conftest.so \
3342 conftest.c -v 2>&1 >/dev/null \
3343 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3345 rm -f conftest.c conftest.so
3346 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3347 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3348 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3349 CFLAGS="$ac_save_CFLAGS"
3352 AC_MSG_RESULT($glibcxx_shared_libgcc)
3354 # For GNU ld, we need at least this version. The format is described in
3355 # GLIBCXX_CHECK_LINKER_FEATURES above.
3356 glibcxx_min_gnu_ld_version=21400
3358 # If no shared libgcc, can't win.
3359 if test $glibcxx_shared_libgcc != yes; then
3360 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3361 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3362 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3364 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3365 : All interesting versions of Sun ld support sun style symbol versioning.
3366 elif test $with_gnu_ld != yes ; then
3368 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3369 AC_MSG_WARN([=== you are not using the GNU linker.])
3370 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3372 elif test $glibcxx_ld_is_gold = yes ; then
3373 : All versions of gold support symbol versioning.
3374 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3375 # The right tools, the right setup, but too old. Fallbacks?
3376 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3377 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3378 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3379 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3380 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3385 # For libtool versioning info, format is CURRENT:REVISION:AGE
3386 libtool_VERSION=6:22:0
3388 # Everything parsed; figure out what files and settings to use.
3389 case $enable_symvers in
3391 SYMVER_FILE=config/abi/pre/none.ver
3394 SYMVER_FILE=config/abi/pre/gnu.ver
3395 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3396 [Define to use GNU versioning in the shared library.])
3398 gnu-versioned-namespace)
3399 libtool_VERSION=7:0:0
3400 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3401 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3402 [Define to use GNU namespace versioning in the shared library.])
3405 SYMVER_FILE=config/abi/pre/gnu.ver
3406 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3407 [Define to use darwin versioning in the shared library.])
3410 SYMVER_FILE=config/abi/pre/gnu.ver
3411 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3412 [Define to use Sun versioning in the shared library.])
3416 if test x$enable_symvers != xno ; then
3417 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3418 [Define to use symbol versioning in the shared library.])
3421 AC_CACHE_CHECK([whether the target supports .symver directive],
3422 glibcxx_cv_have_as_symver_directive, [
3423 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3424 [], glibcxx_cv_have_as_symver_directive=yes,
3425 glibcxx_cv_have_as_symver_directive=no)])
3426 if test $glibcxx_cv_have_as_symver_directive = yes; then
3427 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3428 [Define to 1 if the target assembler supports .symver directive.])
3431 AC_SUBST(SYMVER_FILE)
3432 AC_SUBST(port_specific_symbol_files)
3433 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3434 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3435 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3436 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3437 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3438 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3440 if test $enable_symvers != no ; then
3441 case ${target_os} in
3442 # The Solaris 2 runtime linker doesn't support the GNU extension of
3443 # binding the same symbol to different versions
3446 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3448 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3449 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3454 # Now, set up compatibility support, if any.
3455 # In addition, need this to deal with std::size_t mangling in
3456 # src/compatibility.cc. In a perfect world, could use
3457 # typeid(std::size_t).name()[0] to do direct substitution.
3458 AC_MSG_CHECKING([for size_t as unsigned int])
3459 ac_save_CFLAGS="$CFLAGS"
3461 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3462 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3463 CFLAGS=$ac_save_CFLAGS
3464 if test "$glibcxx_size_t_is_i" = yes; then
3465 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3467 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3469 AC_MSG_CHECKING([for ptrdiff_t as int])
3470 ac_save_CFLAGS="$CFLAGS"
3472 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3473 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3474 CFLAGS=$ac_save_CFLAGS
3475 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3476 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3478 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3483 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3484 dnl We must stage the required headers so that they will be installed
3485 dnl with the library (unlike libgcc, the STL implementation is provided
3486 dnl solely within headers). Since we must not inject random user-space
3487 dnl macro names into user-provided C++ code, we first stage into <file>-in
3488 dnl and process to <file> with an output command. The reason for a two-
3489 dnl stage process here is to correctly handle $srcdir!=$objdir without
3490 dnl having to write complex code (the sed commands to clean the macro
3491 dnl namespace are complex and fragile enough as it is). We must also
3492 dnl add a relative path so that -I- is supported properly.
3497 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3498 AC_MSG_CHECKING([for thread model used by GCC])
3499 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3500 AC_MSG_RESULT([$target_thread_file])
3501 GCC_AC_THREAD_HEADER([$target_thread_file])
3506 dnl Check if gthread implementation defines the types and functions
3507 dnl required by the c++0x thread library. Conforming gthread
3508 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3510 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3512 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3513 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3515 if test x$enable_libstdcxx_threads = xauto ||
3516 test x$enable_libstdcxx_threads = xyes; then
3521 ac_save_CXXFLAGS="$CXXFLAGS"
3522 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3523 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3525 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3526 case $target_thread_file in
3528 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3531 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3533 AC_TRY_COMPILE([#include <unistd.h>],
3535 // In case of POSIX threads check _POSIX_TIMEOUTS.
3536 #if (defined(_PTHREADS) \
3537 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3540 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3542 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3543 [Define to 1 if mutex_timedlock is available.])
3545 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3546 else res_mutex_timedlock=no ; fi
3547 AC_MSG_RESULT([$res_mutex_timedlock])
3549 AC_MSG_CHECKING([for gthreads library])
3551 AC_TRY_COMPILE([#include "gthr.h"],
3553 #ifndef __GTHREADS_CXX0X
3556 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3561 AC_MSG_RESULT([$ac_has_gthreads])
3563 if test x"$ac_has_gthreads" = x"yes"; then
3564 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3565 [Define if gthreads library is available.])
3567 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3568 AC_CHECK_TYPE([pthread_rwlock_t],
3569 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3570 [Define if POSIX read/write locks are available in <gthr.h>.])],
3572 [#include "gthr.h"])
3575 CXXFLAGS="$ac_save_CXXFLAGS"
3580 # Check whether LC_MESSAGES is available in <locale.h>.
3581 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3583 # This file file be copied and used freely without restrictions. It can
3584 # be used in projects which are not available under the GNU Public License
3585 # but which still want to provide support for the GNU gettext functionality.
3586 # Please note that the actual code is *not* freely available.
3587 AC_DEFUN([AC_LC_MESSAGES], [
3588 AC_CHECK_HEADER(locale.h, [
3589 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3590 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3591 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3592 if test $ac_cv_val_LC_MESSAGES = yes; then
3593 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3594 [Define if LC_MESSAGES is available in <locale.h>.])
3600 dnl Check whether rdrand is supported in the assembler.
3601 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3602 AC_MSG_CHECKING([for rdrand support in assembler])
3603 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3608 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3609 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3612 if test $ac_cv_x86_rdrand = yes; then
3613 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3614 [ Defined if as can handle rdrand. ])
3616 AC_MSG_RESULT($ac_cv_x86_rdrand)
3620 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3622 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3626 ac_save_CXXFLAGS="$CXXFLAGS"
3627 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3629 AC_MSG_CHECKING([for get_nprocs])
3630 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3631 GCC_TRY_COMPILE_OR_LINK(
3632 [#include <sys/sysinfo.h>],
3633 [int n = get_nprocs();],
3634 [glibcxx_cv_GET_NPROCS=yes],
3635 [glibcxx_cv_GET_NPROCS=no])
3637 if test $glibcxx_cv_GET_NPROCS = yes; then
3638 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3640 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3642 CXXFLAGS="$ac_save_CXXFLAGS"
3647 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3649 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3653 ac_save_CXXFLAGS="$CXXFLAGS"
3654 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3656 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3657 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3658 GCC_TRY_COMPILE_OR_LINK(
3659 [#include <unistd.h>],
3660 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3661 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3662 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3664 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3665 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3667 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3669 CXXFLAGS="$ac_save_CXXFLAGS"
3674 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3676 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3680 ac_save_CXXFLAGS="$CXXFLAGS"
3681 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3683 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3684 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3685 GCC_TRY_COMPILE_OR_LINK(
3686 [#include <unistd.h>],
3687 [int n = sysconf(_SC_NPROC_ONLN);],
3688 [glibcxx_cv_SC_NPROC_ONLN=yes],
3689 [glibcxx_cv_SC_NPROC_ONLN=no])
3691 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3692 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3694 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3696 CXXFLAGS="$ac_save_CXXFLAGS"
3701 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3703 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3707 ac_save_CXXFLAGS="$CXXFLAGS"
3708 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3710 AC_MSG_CHECKING([for pthreads_num_processors_np])
3711 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3712 GCC_TRY_COMPILE_OR_LINK(
3713 [#include <pthread.h>],
3714 [int n = pthread_num_processors_np();],
3715 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3716 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3718 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3719 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3721 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3723 CXXFLAGS="$ac_save_CXXFLAGS"
3728 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3730 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
3734 ac_save_CXXFLAGS="$CXXFLAGS"
3735 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3737 AC_MSG_CHECKING([for hw.ncpu sysctl])
3738 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
3739 GCC_TRY_COMPILE_OR_LINK(
3742 #include <sys/sysctl.h>
3746 size_t size = sizeof(count);
3747 int mib[] = { CTL_HW, HW_NCPU };
3748 sysctl(mib, 2, &count, &size, NULL, 0);
3750 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
3751 [glibcxx_cv_SYSCTL_HW_NCPU=no])
3753 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
3754 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
3756 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
3758 CXXFLAGS="$ac_save_CXXFLAGS"
3763 dnl Check to see if python pretty printing can be activated.
3765 dnl --with-python-dir=dir
3766 dnl installs directory into $prefix/dir
3767 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
3769 AC_MSG_CHECKING([for custom python install directory])
3770 AC_ARG_WITH([python-dir],
3771 AS_HELP_STRING([--with-python-dir],
3772 [the location to install Python modules. This path is relative starting from the prefix.]),
3773 [with_python_dir=$withval], [with_python_dir="no"])
3774 AC_MSG_RESULT(${with_python_dir})
3776 # Needed for installing Python modules during make install.
3777 python_mod_dir="${with_python_dir}"
3778 AC_SUBST(python_mod_dir)
3779 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
3783 dnl Check to see if -Werror is disabled.
3785 dnl --enable-werror/--disable-werror
3786 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
3787 AC_MSG_CHECKING([for -Werror])
3788 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
3789 AC_MSG_RESULT($enable_werror)
3790 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
3794 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
3795 dnl and define _GLIBCXX_USE_TMPNAM.
3797 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
3801 ac_save_CXXFLAGS="$CXXFLAGS"
3802 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3804 AC_MSG_CHECKING([for tmpnam])
3805 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
3806 GCC_TRY_COMPILE_OR_LINK(
3807 [#include <stdio.h>],
3808 [char *tmp = tmpnam(NULL);],
3809 [glibcxx_cv_TMPNAM=yes],
3810 [glibcxx_cv_TMPNAM=no])
3812 if test $glibcxx_cv_TMPNAM = yes; then
3813 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
3815 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
3817 CXXFLAGS="$ac_save_CXXFLAGS"
3822 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
3823 dnl Some versions of sdt.h were not compatible with C++11.
3825 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
3826 AC_MSG_CHECKING([for suitable sys/sdt.h])
3827 # Note that this test has to be run with the C language.
3828 # Otherwise, sdt.h will try to include some headers from
3832 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
3833 # Because we have to run the test in C, we use grep rather
3834 # than the compiler to check for the bug. The bug is that
3835 # were strings without trailing whitespace, causing g++
3836 # to look for operator"". The pattern searches for the fixed
3838 AC_EGREP_CPP([ \",\" ], [
3839 #include <sys/sdt.h>
3840 int f() { STAP_PROBE(hi, bob); }
3841 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
3844 if test $glibcxx_cv_sys_sdt_h = yes; then
3845 AC_DEFINE(HAVE_SYS_SDT_H, 1,
3846 [Define to 1 if you have a suitable <sys/sdt.h> header file])
3848 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
3852 dnl Control whether the library should define symbols for old and new ABIs.
3853 dnl This affects definitions of strings, stringstreams and locale facets.
3855 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
3858 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
3860 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
3861 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
3862 if test x$enable_symvers = xgnu-versioned-namespace; then
3863 # gnu-versioned-namespace is incompatible with the dual ABI.
3864 enable_libstdcxx_dual_abi="no"
3866 if test x"$enable_libstdcxx_dual_abi" != xyes; then
3867 AC_MSG_NOTICE([dual ABI is disabled])
3868 default_libstdcxx_abi="c++98"
3870 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
3874 dnl Check to see which ABI should be enabled by default.
3876 dnl --with-default-libstdcxx-abi={c++98,c++11}
3879 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
3881 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
3882 if test x$enable_libstdcxx_dual_abi = xyes; then
3883 AC_MSG_CHECKING([for default std::string ABI to use])
3884 AC_ARG_WITH([default-libstdcxx-abi],
3885 AS_HELP_STRING([--with-default-libstdcxx-abi],
3886 [set the std::string ABI to use by default]),
3888 c++98|gnu++98|c++03|gnu++03) default_libstdcxx_abi="c++98" ;;
3889 c++1?|gnu++1?) default_libstdcxx_abi="c++11" ;;
3890 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
3892 [default_libstdcxx_abi="c++11"])
3893 AC_MSG_RESULT(${default_libstdcxx_abi})
3895 if test $default_libstdcxx_abi = "c++11"; then
3902 AC_SUBST(glibcxx_cxx98_abi)
3903 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
3907 # Macros from the top-level gcc directory.
3908 m4_include([../config/gc++filt.m4])
3909 m4_include([../config/tls.m4])
3910 m4_include([../config/gthr.m4])