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 $host.
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_builddir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/filesystem doc po testsuite python])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${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
921 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__
922 # undefined may cause fake C99 facilities, like pre-standard snprintf,
923 # to be spuriously enabled.
924 ac_save_CXXFLAGS="$CXXFLAGS"
925 CXXFLAGS="$CXXFLAGS -std=c++98"
927 ac_save_gcc_no_link="$gcc_no_link"
929 if test x$gcc_no_link != xyes; then
930 # Use -fno-exceptions to that the C driver can link these tests without
931 # hitting undefined references to personality routines.
932 CXXFLAGS="$CXXFLAGS -fno-exceptions"
933 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
934 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
939 # Check for the existence of <math.h> functions used if C99 is enabled.
940 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98])
941 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [
942 GCC_TRY_COMPILE_OR_LINK(
944 volatile double d1, d2;
952 i = isgreater(d1, d2);
953 i = isgreaterequal(d1, d2);
955 i = islessequal(d1, d2);
956 i = islessgreater(d1, d2);
957 i = islessgreater(d1, d2);
958 i = isunordered(d1, d2);
959 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no])
961 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98)
962 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then
963 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1,
964 [Define if C99 functions or macros in <math.h> should be imported
965 in <cmath> in namespace std for C++98.])
968 # Check for the existence of <complex.h> complex math functions.
969 # This is necessary even though libstdc++ uses the builtin versions
970 # of these functions, because if the builtin cannot be used, a reference
971 # to the library function is emitted.
972 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
973 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
974 if test x"$ac_has_complex_h" = x"yes"; then
975 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98])
976 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [
977 GCC_TRY_COMPILE_OR_LINK(
978 [#include <complex.h>
979 typedef __complex__ float float_type;
980 typedef __complex__ double double_type;
981 typedef __complex__ long double ld_type;
982 volatile float_type tmpf;
983 volatile double_type tmpd;
984 volatile ld_type tmpld;
987 volatile long double ld;],
999 tmpf = cpowf(tmpf, tmpf);
1000 tmpf = cprojf(tmpf);
1012 tmpd = cpow(tmpd, tmpd);
1016 tmpld = ccosl(tmpld);
1017 tmpld = ccoshl(tmpld);
1018 tmpld = cexpl(tmpld);
1019 tmpld = clogl(tmpld);
1020 tmpld = csinl(tmpld);
1021 tmpld = csinhl(tmpld);
1022 tmpld = csqrtl(tmpld);
1023 tmpld = ctanl(tmpld);
1024 tmpld = ctanhl(tmpld);
1025 tmpld = cpowl(tmpld, tmpld);
1026 tmpld = cprojl(tmpld);
1027 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no])
1030 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98)
1031 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then
1032 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1,
1033 [Define if C99 functions in <complex.h> should be used in
1034 <complex> for C++98. Using compiler builtins for these functions
1035 requires corresponding C99 library functions to be present.])
1038 # Check for the existence in <stdio.h> of vscanf, et. al.
1039 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98])
1040 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [
1041 GCC_TRY_COMPILE_OR_LINK(
1044 void foo(char* fmt, ...)
1046 va_list args; va_start(args, fmt);
1047 vfscanf(stderr, "%i", args);
1049 vsnprintf(fmt, 0, "%i", args);
1050 vsscanf(fmt, "%i", args);
1051 snprintf(fmt, 0, "%i");
1053 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no])
1055 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98)
1056 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then
1057 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1,
1058 [Define if C99 functions or macros in <stdio.h> should be imported
1059 in <cstdio> in namespace std for C++98.])
1062 # Check for the existence in <wchar.h> of wcstold, etc.
1063 if test x"$ac_has_wchar_h" = xyes &&
1064 test x"$ac_has_wctype_h" = xyes; then
1065 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98])
1066 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [
1067 AC_TRY_COMPILE([#include <wchar.h>
1074 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no])
1077 # Checks for wide character functions that may not be present.
1078 # Injection of these is wrapped with guard macros.
1079 # NB: only put functions here, instead of immediately above, if
1080 # absolutely necessary.
1081 AC_TRY_COMPILE([#include <wchar.h>
1082 namespace test { using ::vfwscanf; }], [],
1083 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1085 AC_TRY_COMPILE([#include <wchar.h>
1086 namespace test { using ::vswscanf; }], [],
1087 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1089 AC_TRY_COMPILE([#include <wchar.h>
1090 namespace test { using ::vwscanf; }], [],
1091 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1093 AC_TRY_COMPILE([#include <wchar.h>
1094 namespace test { using ::wcstof; }], [],
1095 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1097 AC_TRY_COMPILE([#include <wctype.h>],
1098 [wint_t t; int i = iswblank(t);],
1099 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1101 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98)
1102 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then
1103 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1,
1104 [Define if C99 functions or macros in <wchar.h> should be imported
1105 in <cwchar> in namespace std for C++98.])
1109 # Option parsed, now set things appropriately.
1110 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" ||
1111 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" ||
1112 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" ||
1113 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" ||
1114 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then
1117 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1118 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1119 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1122 gcc_no_link="$ac_save_gcc_no_link"
1123 LIBS="$ac_save_LIBS"
1124 CXXFLAGS="$ac_save_CXXFLAGS"
1130 # Use -std=c++11 and test again for C99 library feature in C++11 mode.
1131 # For the reasons given above we use -std=c++11 not -std=gnu++11.
1132 ac_save_CXXFLAGS="$CXXFLAGS"
1133 CXXFLAGS="$CXXFLAGS -std=c++11"
1134 ac_save_LIBS="$LIBS"
1135 ac_save_gcc_no_link="$gcc_no_link"
1137 if test x$gcc_no_link != xyes; then
1138 # Use -fno-exceptions to that the C driver can link these tests without
1139 # hitting undefined references to personality routines.
1140 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1141 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
1142 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
1147 # Check for the existence of <math.h> functions used if C99 is enabled.
1148 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11])
1149 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [
1150 GCC_TRY_COMPILE_OR_LINK(
1152 volatile double d1, d2;
1154 [i = fpclassify(d1);
1160 i = isgreater(d1, d2);
1161 i = isgreaterequal(d1, d2);
1163 i = islessequal(d1, d2);
1164 i = islessgreater(d1, d2);
1165 i = islessgreater(d1, d2);
1166 i = isunordered(d1, d2);
1167 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no])
1169 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11)
1170 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then
1171 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1,
1172 [Define if C99 functions or macros in <math.h> should be imported
1173 in <cmath> in namespace std for C++11.])
1176 # Check for the existence of <complex.h> complex math functions.
1177 # This is necessary even though libstdc++ uses the builtin versions
1178 # of these functions, because if the builtin cannot be used, a reference
1179 # to the library function is emitted.
1180 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
1181 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1182 if test x"$ac_has_complex_h" = x"yes"; then
1183 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11])
1184 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [
1185 GCC_TRY_COMPILE_OR_LINK(
1186 [#include <complex.h>
1187 typedef __complex__ float float_type;
1188 typedef __complex__ double double_type;
1189 typedef __complex__ long double ld_type;
1190 volatile float_type tmpf;
1191 volatile double_type tmpd;
1192 volatile ld_type tmpld;
1195 volatile long double ld;],
1199 tmpf = ccoshf(tmpf);
1203 tmpf = csinhf(tmpf);
1204 tmpf = csqrtf(tmpf);
1206 tmpf = ctanhf(tmpf);
1207 tmpf = cpowf(tmpf, tmpf);
1208 tmpf = cprojf(tmpf);
1220 tmpd = cpow(tmpd, tmpd);
1224 tmpld = ccosl(tmpld);
1225 tmpld = ccoshl(tmpld);
1226 tmpld = cexpl(tmpld);
1227 tmpld = clogl(tmpld);
1228 tmpld = csinl(tmpld);
1229 tmpld = csinhl(tmpld);
1230 tmpld = csqrtl(tmpld);
1231 tmpld = ctanl(tmpld);
1232 tmpld = ctanhl(tmpld);
1233 tmpld = cpowl(tmpld, tmpld);
1234 tmpld = cprojl(tmpld);
1235 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no])
1238 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11)
1239 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then
1240 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1,
1241 [Define if C99 functions in <complex.h> should be used in
1242 <complex> for C++11. Using compiler builtins for these functions
1243 requires corresponding C99 library functions to be present.])
1246 # Check for the existence in <stdio.h> of vscanf, et. al.
1247 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11])
1248 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [
1249 GCC_TRY_COMPILE_OR_LINK(
1252 void foo(char* fmt, ...)
1254 va_list args; va_start(args, fmt);
1255 vfscanf(stderr, "%i", args);
1257 vsnprintf(fmt, 0, "%i", args);
1258 vsscanf(fmt, "%i", args);
1259 snprintf(fmt, 0, "%i");
1261 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no])
1263 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11)
1264 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then
1265 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1,
1266 [Define if C99 functions or macros in <stdio.h> should be imported
1267 in <cstdio> in namespace std for C++11.])
1270 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1271 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11])
1272 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [
1273 GCC_TRY_COMPILE_OR_LINK(
1274 [#include <stdlib.h>
1276 volatile long double ld;
1277 volatile unsigned long long ll;
1280 f = strtof("gnu", &tmp);
1281 ld = strtold("gnu", &tmp);
1282 ll = strtoll("gnu", &tmp, 10);
1283 ll = strtoull("gnu", &tmp, 10);
1285 mydivt = lldiv(10,1);
1290 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no])
1292 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11)
1293 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then
1294 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1,
1295 [Define if C99 functions or macros in <stdlib.h> should be imported
1296 in <cstdlib> in namespace std for C++11.])
1299 # Check for the existence in <wchar.h> of wcstold, etc.
1300 if test x"$ac_has_wchar_h" = xyes &&
1301 test x"$ac_has_wctype_h" = xyes; then
1302 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11])
1303 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [
1304 AC_TRY_COMPILE([#include <wchar.h>
1311 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no])
1314 # Checks for wide character functions that may not be present.
1315 # Injection of these is wrapped with guard macros.
1316 # NB: only put functions here, instead of immediately above, if
1317 # absolutely necessary.
1318 AC_TRY_COMPILE([#include <wchar.h>
1319 namespace test { using ::vfwscanf; }], [],
1320 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1322 AC_TRY_COMPILE([#include <wchar.h>
1323 namespace test { using ::vswscanf; }], [],
1324 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1326 AC_TRY_COMPILE([#include <wchar.h>
1327 namespace test { using ::vwscanf; }], [],
1328 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1330 AC_TRY_COMPILE([#include <wchar.h>
1331 namespace test { using ::wcstof; }], [],
1332 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1334 AC_TRY_COMPILE([#include <wctype.h>],
1335 [wint_t t; int i = iswblank(t);],
1336 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1338 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11)
1339 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then
1340 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1,
1341 [Define if C99 functions or macros in <wchar.h> should be imported
1342 in <cwchar> in namespace std for C++11.])
1346 gcc_no_link="$ac_save_gcc_no_link"
1347 LIBS="$ac_save_LIBS"
1348 CXXFLAGS="$ac_save_CXXFLAGS"
1352 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1353 AC_MSG_RESULT($enable_c99)
1358 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1359 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1360 dnl in the C++11 standard.
1362 dnl --enable-libstdcxx-time
1363 dnl --enable-libstdcxx-time=yes
1364 dnl checks for the availability of monotonic and realtime clocks,
1365 dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1366 dnl links in the latter.
1367 dnl --enable-libstdcxx-time=rt
1368 dnl also searches (and, if needed, links) librt. Note that this is
1369 dnl not always desirable because, in glibc 2.16 and earlier, for
1370 dnl example, in turn it triggers the linking of libpthread too,
1371 dnl which activates locking,
1372 dnl a large overhead for single-thread programs.
1373 dnl --enable-libstdcxx-time=no
1374 dnl --disable-libstdcxx-time
1375 dnl disables the checks completely
1377 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1378 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1379 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1380 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1382 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1384 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
1385 [use KIND for check type],
1390 ac_save_CXXFLAGS="$CXXFLAGS"
1391 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1392 ac_save_LIBS="$LIBS"
1394 ac_has_clock_monotonic=no
1395 ac_has_clock_realtime=no
1397 ac_has_sched_yield=no
1399 if test x"$enable_libstdcxx_time" = x"auto"; then
1401 case "${target_os}" in
1403 ac_has_nanosleep=yes
1406 ac_has_nanosleep=yes
1407 ac_has_sched_yield=yes
1409 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1410 AC_MSG_CHECKING([for at least GNU libc 2.17])
1412 [#include <features.h>],
1414 #if ! __GLIBC_PREREQ(2, 17)
1418 [glibcxx_glibc217=yes], [glibcxx_glibc217=no])
1419 AC_MSG_RESULT($glibcxx_glibc217)
1421 if test x"$glibcxx_glibc217" = x"yes"; then
1422 ac_has_clock_monotonic=yes
1423 ac_has_clock_realtime=yes
1425 ac_has_nanosleep=yes
1426 ac_has_sched_yield=yes
1428 freebsd*|netbsd*|dragonfly*)
1429 ac_has_clock_monotonic=yes
1430 ac_has_clock_realtime=yes
1431 ac_has_nanosleep=yes
1432 ac_has_sched_yield=yes
1435 ac_has_clock_monotonic=yes
1436 ac_has_clock_realtime=yes
1437 ac_has_nanosleep=yes
1440 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
1441 ac_has_clock_monotonic=yes
1442 ac_has_clock_realtime=yes
1443 ac_has_nanosleep=yes
1444 ac_has_sched_yield=yes
1448 elif test x"$enable_libstdcxx_time" != x"no"; then
1450 if test x"$enable_libstdcxx_time" = x"rt"; then
1451 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1452 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1454 AC_SEARCH_LIBS(clock_gettime, [posix4])
1455 AC_SEARCH_LIBS(nanosleep, [posix4])
1458 case "$ac_cv_search_clock_gettime" in
1459 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1462 case "$ac_cv_search_nanosleep" in
1463 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1467 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1469 case "$ac_cv_search_sched_yield" in
1471 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1472 ac_has_sched_yield=yes
1475 if test x"$enable_libstdcxx_time" = x"rt"; then
1476 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1477 ac_has_sched_yield=yes
1481 ac_has_sched_yield=yes
1485 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1487 if test x"$ac_has_unistd_h" = x"yes"; then
1488 AC_MSG_CHECKING([for monotonic clock])
1490 [#include <unistd.h>
1493 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1496 clock_gettime(CLOCK_MONOTONIC, &tp);
1497 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1499 AC_MSG_RESULT($ac_has_clock_monotonic)
1501 AC_MSG_CHECKING([for realtime clock])
1503 [#include <unistd.h>
1506 [#if _POSIX_TIMERS > 0
1509 clock_gettime(CLOCK_REALTIME, &tp);
1510 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1512 AC_MSG_RESULT($ac_has_clock_realtime)
1514 AC_MSG_CHECKING([for nanosleep])
1516 [#include <unistd.h>
1519 [#if _POSIX_TIMERS > 0
1523 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1525 AC_MSG_RESULT($ac_has_nanosleep)
1529 if test x"$ac_has_clock_monotonic" != x"yes"; then
1530 case ${target_os} in
1532 AC_MSG_CHECKING([for clock_gettime syscall])
1534 [#include <unistd.h>
1536 #include <sys/syscall.h>
1538 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1541 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1542 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1543 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
1544 AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
1545 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
1546 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1547 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1548 ac_has_clock_monotonic=yes
1549 ac_has_clock_realtime=yes
1554 if test x"$ac_has_clock_monotonic" = x"yes"; then
1555 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1556 [ Defined if clock_gettime has monotonic clock support. ])
1559 if test x"$ac_has_clock_realtime" = x"yes"; then
1560 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1561 [ Defined if clock_gettime has realtime clock support. ])
1564 if test x"$ac_has_sched_yield" = x"yes"; then
1565 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1566 [ Defined if sched_yield is available. ])
1569 if test x"$ac_has_nanosleep" = x"yes"; then
1570 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1571 [ Defined if nanosleep is available. ])
1573 AC_MSG_CHECKING([for sleep])
1574 AC_TRY_COMPILE([#include <unistd.h>],
1576 [ac_has_sleep=yes],[ac_has_sleep=no])
1577 if test x"$ac_has_sleep" = x"yes"; then
1578 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1580 AC_MSG_RESULT($ac_has_sleep)
1581 AC_MSG_CHECKING([for usleep])
1582 AC_TRY_COMPILE([#include <unistd.h>],
1585 [ac_has_usleep=yes],[ac_has_usleep=no])
1586 if test x"$ac_has_usleep" = x"yes"; then
1587 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1589 AC_MSG_RESULT($ac_has_usleep)
1592 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1593 AC_MSG_CHECKING([for Sleep])
1594 AC_TRY_COMPILE([#include <windows.h>],
1596 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1597 if test x"$ac_has_win32_sleep" = x"yes"; then
1598 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1600 AC_MSG_RESULT($ac_has_win32_sleep)
1603 AC_SUBST(GLIBCXX_LIBS)
1605 CXXFLAGS="$ac_save_CXXFLAGS"
1606 LIBS="$ac_save_LIBS"
1611 dnl Check for gettimeofday, used in the implementation of 20.11.7
1612 dnl [time.clock] in the C++11 standard.
1614 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1616 AC_MSG_CHECKING([for gettimeofday])
1620 ac_save_CXXFLAGS="$CXXFLAGS"
1621 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1623 ac_has_gettimeofday=no;
1624 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1625 if test x"$ac_has_sys_time_h" = x"yes"; then
1626 AC_MSG_CHECKING([for gettimeofday])
1627 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1628 [timeval tv; gettimeofday(&tv, 0);],
1629 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1631 AC_MSG_RESULT($ac_has_gettimeofday)
1634 if test x"$ac_has_gettimeofday" = x"yes"; then
1635 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1636 [ Defined if gettimeofday is available. ])
1639 CXXFLAGS="$ac_save_CXXFLAGS"
1644 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1645 dnl facilities in Chapter 8, "C compatibility".
1647 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1652 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1653 # undefined and fake C99 facilities may be spuriously enabled.
1654 ac_save_CXXFLAGS="$CXXFLAGS"
1655 CXXFLAGS="$CXXFLAGS -std=c++98"
1657 # Check for the existence of <complex.h> complex math functions used
1659 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1660 ac_c99_complex_tr1=no;
1661 if test x"$ac_has_complex_h" = x"yes"; then
1662 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1663 AC_TRY_COMPILE([#include <complex.h>],
1664 [typedef __complex__ float float_type; float_type tmpf;
1671 typedef __complex__ double double_type; double_type tmpd;
1678 typedef __complex__ long double ld_type; ld_type tmpld;
1685 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1687 AC_MSG_RESULT($ac_c99_complex_tr1)
1688 if test x"$ac_c99_complex_tr1" = x"yes"; then
1689 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1690 [Define if C99 functions in <complex.h> should be used in
1691 <tr1/complex>. Using compiler builtins for these functions
1692 requires corresponding C99 library functions to be present.])
1695 # Check for the existence of <ctype.h> functions.
1696 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1697 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1698 AC_TRY_COMPILE([#include <ctype.h>],
1702 ],[glibcxx_cv_c99_ctype_tr1=yes],
1703 [glibcxx_cv_c99_ctype_tr1=no])
1705 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1706 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1707 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1708 [Define if C99 functions in <ctype.h> should be imported in
1709 <tr1/cctype> in namespace std::tr1.])
1712 # Check for the existence of <fenv.h> functions.
1713 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1715 if test x"$ac_has_fenv_h" = x"yes"; then
1716 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1717 AC_TRY_COMPILE([#include <fenv.h>],
1722 ret = feclearexcept(except);
1723 ret = fegetexceptflag(pflag, except);
1724 ret = feraiseexcept(except);
1725 ret = fesetexceptflag(pflag, except);
1726 ret = fetestexcept(except);
1728 ret = fesetround(mode);
1729 ret = fegetenv(penv);
1730 ret = feholdexcept(penv);
1731 ret = fesetenv(penv);
1732 ret = feupdateenv(penv);
1733 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1735 AC_MSG_RESULT($ac_c99_fenv_tr1)
1736 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1737 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1738 [Define if C99 functions in <fenv.h> should be imported in
1739 <tr1/cfenv> in namespace std::tr1.])
1742 # Check for the existence of <stdint.h> types.
1743 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1744 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1745 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1746 #define __STDC_CONSTANT_MACROS
1747 #include <stdint.h>],
1748 [typedef int8_t my_int8_t;
1749 my_int8_t i8 = INT8_MIN;
1751 typedef int16_t my_int16_t;
1752 my_int16_t i16 = INT16_MIN;
1754 typedef int32_t my_int32_t;
1755 my_int32_t i32 = INT32_MIN;
1757 typedef int64_t my_int64_t;
1758 my_int64_t i64 = INT64_MIN;
1760 typedef int_fast8_t my_int_fast8_t;
1761 my_int_fast8_t if8 = INT_FAST8_MIN;
1762 if8 = INT_FAST8_MAX;
1763 typedef int_fast16_t my_int_fast16_t;
1764 my_int_fast16_t if16 = INT_FAST16_MIN;
1765 if16 = INT_FAST16_MAX;
1766 typedef int_fast32_t my_int_fast32_t;
1767 my_int_fast32_t if32 = INT_FAST32_MIN;
1768 if32 = INT_FAST32_MAX;
1769 typedef int_fast64_t my_int_fast64_t;
1770 my_int_fast64_t if64 = INT_FAST64_MIN;
1771 if64 = INT_FAST64_MAX;
1772 typedef int_least8_t my_int_least8_t;
1773 my_int_least8_t il8 = INT_LEAST8_MIN;
1774 il8 = INT_LEAST8_MAX;
1775 typedef int_least16_t my_int_least16_t;
1776 my_int_least16_t il16 = INT_LEAST16_MIN;
1777 il16 = INT_LEAST16_MAX;
1778 typedef int_least32_t my_int_least32_t;
1779 my_int_least32_t il32 = INT_LEAST32_MIN;
1780 il32 = INT_LEAST32_MAX;
1781 typedef int_least64_t my_int_least64_t;
1782 my_int_least64_t il64 = INT_LEAST64_MIN;
1783 il64 = INT_LEAST64_MAX;
1784 typedef intmax_t my_intmax_t;
1785 my_intmax_t im = INTMAX_MAX;
1787 typedef intptr_t my_intptr_t;
1788 my_intptr_t ip = INTPTR_MAX;
1790 typedef uint8_t my_uint8_t;
1791 my_uint8_t ui8 = UINT8_MAX;
1793 typedef uint16_t my_uint16_t;
1794 my_uint16_t ui16 = UINT16_MAX;
1796 typedef uint32_t my_uint32_t;
1797 my_uint32_t ui32 = UINT32_MAX;
1799 typedef uint64_t my_uint64_t;
1800 my_uint64_t ui64 = UINT64_MAX;
1802 typedef uint_fast8_t my_uint_fast8_t;
1803 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1804 uif8 = UINT_FAST8_MAX;
1805 typedef uint_fast16_t my_uint_fast16_t;
1806 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1807 uif16 = UINT_FAST16_MAX;
1808 typedef uint_fast32_t my_uint_fast32_t;
1809 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1810 uif32 = UINT_FAST32_MAX;
1811 typedef uint_fast64_t my_uint_fast64_t;
1812 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1813 uif64 = UINT_FAST64_MAX;
1814 typedef uint_least8_t my_uint_least8_t;
1815 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1816 uil8 = UINT_LEAST8_MAX;
1817 typedef uint_least16_t my_uint_least16_t;
1818 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1819 uil16 = UINT_LEAST16_MAX;
1820 typedef uint_least32_t my_uint_least32_t;
1821 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1822 uil32 = UINT_LEAST32_MAX;
1823 typedef uint_least64_t my_uint_least64_t;
1824 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1825 uil64 = UINT_LEAST64_MAX;
1826 typedef uintmax_t my_uintmax_t;
1827 my_uintmax_t uim = UINTMAX_MAX;
1829 typedef uintptr_t my_uintptr_t;
1830 my_uintptr_t uip = UINTPTR_MAX;
1832 ],[glibcxx_cv_c99_stdint_tr1=yes],
1833 [glibcxx_cv_c99_stdint_tr1=no])
1835 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1836 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1837 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1838 [Define if C99 types in <stdint.h> should be imported in
1839 <tr1/cstdint> in namespace std::tr1.])
1842 # Check for the existence of <math.h> functions.
1843 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1844 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1845 AC_TRY_COMPILE([#include <math.h>],
1846 [typedef double_t my_double_t;
1847 typedef float_t my_float_t;
1861 copysignf(0.0f, 0.0f);
1862 copysignl(0.0l, 0.0l);
1879 fmaf(0.0f, 0.0f, 0.0f);
1880 fmal(0.0l, 0.0l, 0.0l);
1923 nextafter(0.0, 0.0);
1924 nextafterf(0.0f, 0.0f);
1925 nextafterl(0.0l, 0.0l);
1926 nexttoward(0.0, 0.0);
1927 nexttowardf(0.0f, 0.0f);
1928 nexttowardl(0.0l, 0.0l);
1929 remainder(0.0, 0.0);
1930 remainderf(0.0f, 0.0f);
1931 remainderl(0.0l, 0.0l);
1932 remquo(0.0, 0.0, 0);
1933 remquof(0.0f, 0.0f, 0);
1934 remquol(0.0l, 0.0l, 0);
1953 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1955 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1956 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1957 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1958 [Define if C99 functions or macros in <math.h> should be imported
1959 in <tr1/cmath> in namespace std::tr1.])
1962 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1963 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1964 ac_c99_inttypes_tr1=no;
1965 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1966 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1967 AC_TRY_COMPILE([#include <inttypes.h>],
1968 [intmax_t i, numer, denom, base;
1971 intmax_t ret = imaxabs(i);
1972 imaxdiv_t dret = imaxdiv(numer, denom);
1973 ret = strtoimax(s, endptr, base);
1974 uintmax_t uret = strtoumax(s, endptr, base);
1975 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1977 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1978 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1979 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1980 [Define if C99 functions in <inttypes.h> should be imported in
1981 <tr1/cinttypes> in namespace std::tr1.])
1984 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
1985 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1986 ac_c99_inttypes_wchar_t_tr1=no;
1987 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1988 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1989 AC_TRY_COMPILE([#include <inttypes.h>],
1993 intmax_t ret = wcstoimax(s, endptr, base);
1994 uintmax_t uret = wcstoumax(s, endptr, base);
1995 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1996 [ac_c99_inttypes_wchar_t_tr1=no])
1998 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1999 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
2000 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
2001 [Define if wchar_t C99 functions in <inttypes.h> should be
2002 imported in <tr1/cinttypes> in namespace std::tr1.])
2005 # Check for the existence of the <stdbool.h> header.
2006 AC_CHECK_HEADERS(stdbool.h)
2008 # Check for the existence of the <stdalign.h> header.
2009 AC_CHECK_HEADERS(stdalign.h)
2011 CXXFLAGS="$ac_save_CXXFLAGS"
2016 dnl Check for uchar.h and usability.
2018 AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2021 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2025 ac_save_CXXFLAGS="$CXXFLAGS"
2026 CXXFLAGS="$CXXFLAGS -std=c++11"
2028 if test x"$ac_has_uchar_h" = x"yes"; then
2029 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2030 AC_TRY_COMPILE([#include <uchar.h>
2031 #ifdef __STDC_UTF_16__
2032 long i = __STDC_UTF_16__;
2034 #ifdef __STDC_UTF_32__
2035 long j = __STDC_UTF_32__;
2045 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2047 ac_c11_uchar_cxx11=no
2049 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2050 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2051 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2052 [Define if C11 functions in <uchar.h> should be imported into
2053 namespace std in <cuchar>.])
2056 CXXFLAGS="$ac_save_CXXFLAGS"
2062 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
2063 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2065 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
2067 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
2068 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
2069 if test -r /dev/random && test -r /dev/urandom; then
2070 ## For MSys environment the test above is detect as false-positive
2071 ## on mingw-targets. So disable it explicit for them.
2072 case ${target_os} in
2073 *mingw*) glibcxx_cv_random_tr1=no ;;
2074 *) glibcxx_cv_random_tr1=yes ;;
2077 glibcxx_cv_random_tr1=no;
2080 AC_MSG_RESULT($glibcxx_cv_random_tr1)
2082 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
2083 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
2084 [Define if /dev/random and /dev/urandom are available for
2085 the random_device of TR1 (Chapter 5.1).])
2091 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2093 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2095 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
2096 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
2097 [#include <stdio.h>],
2098 [AC_MSG_ERROR([computing EOF failed])])
2100 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
2101 [Define to the value of the EOF integer constant.])
2103 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
2104 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
2105 [#include <stdio.h>],
2106 [AC_MSG_ERROR([computing SEEK_CUR failed])])
2108 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
2109 [Define to the value of the SEEK_CUR integer constant.])
2111 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
2112 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
2113 [#include <stdio.h>],
2114 [AC_MSG_ERROR([computing SEEK_END failed])])
2116 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
2117 [Define to the value of the SEEK_END integer constant.])
2121 dnl Check whether required C++ overloads are present in <stdio.h>.
2123 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2128 AC_MSG_CHECKING([for gets declaration])
2129 AC_CACHE_VAL(glibcxx_cv_gets, [
2130 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2137 [glibcxx_cv_gets=yes],
2138 [glibcxx_cv_gets=no]
2141 if test $glibcxx_cv_gets = yes; then
2142 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
2144 AC_MSG_RESULT($glibcxx_cv_gets)
2150 dnl Check whether required C++11 overloads are present in <math.h>.
2152 AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2156 ac_save_CXXFLAGS="$CXXFLAGS"
2157 CXXFLAGS="$CXXFLAGS -std=c++11"
2161 # Solaris 12 introduced the C++11 <math.h> overloads. A backport to
2162 # a Solaris 11.3 SRU is likely, maybe even a Solaris 10 patch.
2163 AC_MSG_CHECKING([for C++11 <math.h> overloads])
2164 AC_CACHE_VAL(glibcxx_cv_math11_overload, [
2165 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2169 inline bool isfinite(float __x)
2170 { return __builtin_isfinite(__x); }
2173 [glibcxx_cv_math11_overload=no],
2174 [glibcxx_cv_math11_overload=yes]
2177 # autoheader cannot handle indented templates.
2178 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO],
2179 [/* Define if all C++11 overloads are available in <math.h>. */
2180 #if __cplusplus >= 201103L
2181 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO
2184 if test $glibcxx_cv_math11_overload = yes; then
2185 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO)
2187 AC_MSG_RESULT([$glibcxx_cv_math11_overload])
2189 *-*-*gnu* | *-*-aix*)
2190 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2191 # functions (instead of or as well as the C99 generic macros) then we
2192 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2193 # and must use the ones from <math.h> instead.
2194 AC_MSG_CHECKING([for obsolete isinf and isnan functions in <math.h>])
2195 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf_isnan, [
2196 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2203 bool isinf(long double);
2206 bool isnan(long double);
2210 bool b = isinf(0.0) || isnan(0.0);
2212 [glibcxx_cv_obsolete_isinf_isnan=yes],
2213 [glibcxx_cv_obsolete_isinf_isnan=no]
2217 if test $glibcxx_cv_obsolete_isinf_isnan = yes; then
2218 AC_DEFINE(HAVE_OBSOLETE_ISINF_ISNAN, 1,
2219 [Define if <math.h> defines obsolete isinf and isnan functions.])
2221 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf_isnan])
2225 CXXFLAGS="$ac_save_CXXFLAGS"
2230 dnl Check whether macros, etc are present for <system_error>
2232 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2234 m4_pushdef([n_syserr], [1])dnl
2235 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
2236 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
2237 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2238 ECHILD, ENOSPC, EPERM,
2239 ETIMEDOUT, EWOULDBLOCK],
2240 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2241 AC_MSG_CHECKING([for syserr])
2242 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2243 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2244 [int i = syserr;])],
2245 [glibcxx_cv_system_error[]n_syserr=yes],
2246 [glibcxx_cv_system_error[]n_syserr=no])
2248 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2249 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2250 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2252 m4_define([n_syserr], m4_incr(n_syserr))dnl
2253 m4_popdef([SYSERR])dnl
2255 m4_popdef([n_syserr])dnl
2259 dnl Check for what type of C headers to use.
2261 dnl --enable-cheaders= [does stuff].
2262 dnl --disable-cheaders [does not do anything, really].
2263 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2264 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
2266 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2267 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2268 [construct "C" headers for g++], [permit c|c_std|c_global])
2269 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2271 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2273 # Allow overrides to configure.host here.
2274 if test $enable_cheaders = c_global; then
2278 AC_SUBST(C_INCLUDE_DIR)
2279 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2280 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2281 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2282 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2287 dnl Check for which locale library to use. The choice is mapped to
2288 dnl a subdirectory of config/locale.
2290 dnl Default is generic.
2292 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2293 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2294 [use MODEL for target locale package],
2295 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2297 # Deal with gettext issues. Default to not using it (=no) until we detect
2298 # support for it later. Let the user turn it off via --e/d, but let that
2299 # default to on for easier handling.
2302 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2306 # Either a known package, or "auto"
2307 if test $enable_clocale = no || test $enable_clocale = yes; then
2310 enable_clocale_flag=$enable_clocale
2312 # Probe for locale model to use if none specified.
2313 # Default to "generic".
2314 if test $enable_clocale_flag = auto; then
2315 case ${target_os} in
2316 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2317 enable_clocale_flag=gnu
2320 enable_clocale_flag=darwin
2322 dragonfly* | freebsd*)
2323 enable_clocale_flag=dragonfly
2326 enable_clocale_flag=newlib
2329 if test x"$with_newlib" = x"yes"; then
2330 enable_clocale_flag=newlib
2332 enable_clocale_flag=generic
2338 # Sanity check model, and test for special functionality.
2339 if test $enable_clocale_flag = gnu; then
2340 AC_EGREP_CPP([_GLIBCXX_ok], [
2341 #include <features.h>
2342 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2345 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2347 # Set it to scream when it hurts.
2348 ac_save_CFLAGS="$CFLAGS"
2349 CFLAGS="-Wimplicit-function-declaration -Werror"
2351 # Use strxfrm_l if available.
2352 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2354 #include <locale.h>],
2355 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2356 AC_DEFINE(HAVE_STRXFRM_L, 1,
2357 [Define if strxfrm_l is available in <string.h>.]),)
2359 # Use strerror_l if available.
2360 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2362 #include <locale.h>],
2363 [__locale_t loc; strerror_l(5, loc);],
2364 AC_DEFINE(HAVE_STRERROR_L, 1,
2365 [Define if strerror_l is available in <string.h>.]),)
2367 CFLAGS="$ac_save_CFLAGS"
2370 # Perhaps use strerror_r if available, and strerror_l isn't.
2371 ac_save_CFLAGS="$CFLAGS"
2372 CFLAGS="-Wimplicit-function-declaration -Werror"
2373 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2375 #include <locale.h>],
2376 [char s[128]; strerror_r(5, s, 128);],
2377 AC_DEFINE(HAVE_STRERROR_R, 1,
2378 [Define if strerror_r is available in <string.h>.]),)
2379 CFLAGS="$ac_save_CFLAGS"
2381 # Set configure bits for specified locale package
2382 AC_MSG_CHECKING([for C locale to use])
2383 case ${enable_clocale_flag} in
2385 AC_MSG_RESULT(generic)
2387 CLOCALE_H=config/locale/generic/c_locale.h
2388 CLOCALE_CC=config/locale/generic/c_locale.cc
2389 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2390 CCOLLATE_CC=config/locale/generic/collate_members.cc
2391 CCTYPE_CC=config/locale/generic/ctype_members.cc
2392 CMESSAGES_H=config/locale/generic/messages_members.h
2393 CMESSAGES_CC=config/locale/generic/messages_members.cc
2394 CMONEY_CC=config/locale/generic/monetary_members.cc
2395 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2396 CTIME_H=config/locale/generic/time_members.h
2397 CTIME_CC=config/locale/generic/time_members.cc
2398 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2401 AC_MSG_RESULT(darwin)
2403 CLOCALE_H=config/locale/generic/c_locale.h
2404 CLOCALE_CC=config/locale/generic/c_locale.cc
2405 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2406 CCOLLATE_CC=config/locale/generic/collate_members.cc
2407 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2408 CMESSAGES_H=config/locale/generic/messages_members.h
2409 CMESSAGES_CC=config/locale/generic/messages_members.cc
2410 CMONEY_CC=config/locale/generic/monetary_members.cc
2411 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2412 CTIME_H=config/locale/generic/time_members.h
2413 CTIME_CC=config/locale/generic/time_members.cc
2414 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2418 AC_MSG_RESULT(dragonfly or freebsd)
2420 CLOCALE_H=config/locale/dragonfly/c_locale.h
2421 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2422 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2423 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2424 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2425 CMESSAGES_H=config/locale/generic/messages_members.h
2426 CMESSAGES_CC=config/locale/generic/messages_members.cc
2427 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2428 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2429 CTIME_H=config/locale/dragonfly/time_members.h
2430 CTIME_CC=config/locale/dragonfly/time_members.cc
2431 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2437 # Declare intention to use gettext, and add support for specific
2439 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2442 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2443 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2444 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2447 # Export the build objects.
2448 for ling in $ALL_LINGUAS; do \
2449 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2450 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2452 AC_SUBST(glibcxx_MOFILES)
2453 AC_SUBST(glibcxx_POFILES)
2455 CLOCALE_H=config/locale/gnu/c_locale.h
2456 CLOCALE_CC=config/locale/gnu/c_locale.cc
2457 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2458 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2459 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2460 CMESSAGES_H=config/locale/gnu/messages_members.h
2461 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2462 CMONEY_CC=config/locale/gnu/monetary_members.cc
2463 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2464 CTIME_H=config/locale/gnu/time_members.h
2465 CTIME_CC=config/locale/gnu/time_members.cc
2466 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2469 AC_MSG_RESULT(IEEE 1003.1)
2471 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2472 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2473 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2474 CCOLLATE_CC=config/locale/generic/collate_members.cc
2475 CCTYPE_CC=config/locale/generic/ctype_members.cc
2476 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2477 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2478 CMONEY_CC=config/locale/generic/monetary_members.cc
2479 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2480 CTIME_H=config/locale/generic/time_members.h
2481 CTIME_CC=config/locale/generic/time_members.cc
2482 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2485 AC_MSG_RESULT(newlib)
2487 CLOCALE_H=config/locale/generic/c_locale.h
2488 CLOCALE_CC=config/locale/generic/c_locale.cc
2489 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2490 CCOLLATE_CC=config/locale/generic/collate_members.cc
2491 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2492 CMESSAGES_H=config/locale/generic/messages_members.h
2493 CMESSAGES_CC=config/locale/generic/messages_members.cc
2494 CMONEY_CC=config/locale/generic/monetary_members.cc
2495 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2496 CTIME_H=config/locale/generic/time_members.h
2497 CTIME_CC=config/locale/generic/time_members.cc
2498 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2502 # This is where the testsuite looks for locale catalogs, using the
2503 # -DLOCALEDIR define during testsuite compilation.
2504 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2505 AC_SUBST(glibcxx_localedir)
2507 # A standalone libintl (e.g., GNU libintl) may be in use.
2508 if test $USE_NLS = yes; then
2509 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2510 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2512 if test $USE_NLS = yes; then
2513 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2514 [Define if NLS translations are to be used.])
2519 AC_SUBST(CMESSAGES_H)
2520 AC_SUBST(CCODECVT_CC)
2521 AC_SUBST(CCOLLATE_CC)
2523 AC_SUBST(CMESSAGES_CC)
2525 AC_SUBST(CNUMERIC_CC)
2528 AC_SUBST(CLOCALE_CC)
2529 AC_SUBST(CLOCALE_INTERNAL_H)
2534 dnl Check for which std::allocator base class to use. The choice is
2535 dnl mapped from a subdirectory of include/ext.
2539 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2540 AC_MSG_CHECKING([for std::allocator base class])
2541 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2542 [use KIND for target std::allocator base],
2543 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2545 # If they didn't use this option switch, or if they specified --enable
2546 # with no specific model, we'll have to look for one. If they
2547 # specified --disable (???), do likewise.
2548 if test $enable_libstdcxx_allocator = no ||
2549 test $enable_libstdcxx_allocator = yes;
2551 enable_libstdcxx_allocator=auto
2554 # Either a known package, or "auto". Auto implies the default choice
2555 # for a particular platform.
2556 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2558 # Probe for host-specific support if no specific model is specified.
2560 if test $enable_libstdcxx_allocator_flag = auto; then
2561 case ${target_os} in
2562 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2563 enable_libstdcxx_allocator_flag=new
2566 enable_libstdcxx_allocator_flag=new
2570 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2573 # Set configure bits for specified locale package
2574 case ${enable_libstdcxx_allocator_flag} in
2576 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2577 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2580 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2581 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2584 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2585 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2588 ALLOCATOR_H=config/allocator/new_allocator_base.h
2589 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2592 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2593 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2597 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2598 test $enable_libstdcxx_allocator_flag = new)
2599 AC_SUBST(ALLOCATOR_H)
2600 AC_SUBST(ALLOCATOR_NAME)
2605 dnl Check for whether the Boost-derived checks should be turned on.
2607 dnl --enable-concept-checks turns them on.
2608 dnl --disable-concept-checks leaves them off.
2609 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2610 dnl Where DEFAULT is either `yes' or `no'.
2612 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2613 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2614 if test $enable_concept_checks = yes; then
2615 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2616 [Define to use concept checking code from the boost libraries.])
2621 dnl Use extern templates.
2623 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2624 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2626 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2627 dnl Where DEFAULT is `yes' or `no'.
2629 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2631 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2633 AC_MSG_CHECKING([for extern template support])
2634 AC_MSG_RESULT([$enable_extern_template])
2636 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2640 dnl Use vtable verification.
2642 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2643 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2645 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2646 dnl Where DEFAULT is `yes' or `no'.
2648 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2650 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2652 AC_MSG_CHECKING([for vtable verify support])
2653 AC_MSG_RESULT([$enable_vtable_verify])
2656 if test $enable_vtable_verify = yes; then
2657 case ${target_os} in
2659 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2660 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2664 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2665 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2668 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2669 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2672 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2673 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2676 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2683 AC_SUBST(VTV_CXXFLAGS)
2684 AC_SUBST(VTV_PCH_CXXFLAGS)
2685 AC_SUBST(VTV_CXXLINKFLAGS)
2686 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2687 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2691 dnl Check for parallel mode pre-requisites, including OpenMP support.
2693 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2695 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2699 # See if configured libgomp/omp.h exists. (libgomp may be in
2700 # noconfigdirs but not explicitly disabled.)
2701 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2702 enable_parallel=yes;
2704 AC_MSG_NOTICE([target-libgomp not built])
2707 AC_MSG_CHECKING([for parallel mode support])
2708 AC_MSG_RESULT([$enable_parallel])
2713 dnl Check for which I/O library to use: stdio, or something specific.
2715 dnl Default is stdio.
2717 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2718 AC_MSG_CHECKING([for underlying I/O to use])
2719 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2720 [use target-specific I/O package], [permit stdio])
2722 # Now that libio has been removed, you can have any color you want as long
2723 # as it's black. This is one big no-op until other packages are added, but
2724 # showing the framework never hurts.
2725 case ${enable_cstdio} in
2727 CSTDIO_H=config/io/c_io_stdio.h
2728 BASIC_FILE_H=config/io/basic_file_stdio.h
2729 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2730 AC_MSG_RESULT(stdio)
2735 AC_SUBST(BASIC_FILE_H)
2736 AC_SUBST(BASIC_FILE_CC)
2741 dnl Check for "unusual" flags to pass to the compiler while building.
2743 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2744 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2745 dnl --disable-cxx-flags passes nothing.
2746 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2747 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2748 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2749 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2750 dnl If "default flags" is an empty string, the effect is the same
2751 dnl as --disable or --enable=no.
2753 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2754 AC_MSG_CHECKING([for extra compiler flags for building])
2755 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2756 [pass compiler FLAGS when building library],
2757 [case "x$enable_cxx_flags" in
2758 xno | x) enable_cxx_flags= ;;
2760 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2763 # Run through flags (either default or command-line) and set anything
2764 # extra (e.g., #defines) that must accompany particular g++ options.
2765 if test -n "$enable_cxx_flags"; then
2766 for f in $enable_cxx_flags; do
2770 *) # and we're trying to pass /what/ exactly?
2771 AC_MSG_ERROR([compiler flags start with a -]) ;;
2776 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2777 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2778 AC_SUBST(EXTRA_CXX_FLAGS)
2783 dnl Check to see if debugging libraries are to be built.
2785 dnl --enable-libstdcxx-debug
2786 dnl builds a separate set of debugging libraries in addition to the
2787 dnl normal (shared, static) libstdc++ binaries.
2789 dnl --disable-libstdcxx-debug
2790 dnl builds only one (non-debug) version of libstdc++.
2792 dnl --enable-libstdcxx-debug-flags=FLAGS
2793 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2795 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2796 dnl Where DEFAULT is either `yes' or `no'.
2798 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2799 AC_MSG_CHECKING([for additional debug build])
2800 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2801 AC_MSG_RESULT($enable_libstdcxx_debug)
2802 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2807 dnl Check for explicit debug flags.
2809 dnl --enable-libstdcxx-debug-flags='-O1'
2810 dnl is a general method for passing flags to be used when
2811 dnl building debug libraries with --enable-libstdcxx-debug.
2813 dnl --disable-libstdcxx-debug-flags does nothing.
2814 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2815 dnl If "default flags" is an empty string, the effect is the same
2816 dnl as --disable or --enable=no.
2818 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2819 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2820 [pass compiler FLAGS when building debug library],
2821 [case "x$enable_libstdcxx_debug_flags" in
2822 xno | x) enable_libstdcxx_debug_flags= ;;
2824 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2827 # Option parsed, now set things appropriately
2828 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2829 AC_SUBST(DEBUG_FLAGS)
2831 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2836 dnl Check if the user only wants a freestanding library implementation.
2838 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2839 dnl installing only the headers required by [17.4.1.3] and the language
2840 dnl support library. More than that will be built (to keep the Makefiles
2841 dnl conveniently clean), but not installed.
2844 dnl is_hosted (yes/no)
2847 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2849 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2850 AC_ARG_ENABLE([hosted-libstdcxx],
2851 AC_HELP_STRING([--disable-hosted-libstdcxx],
2852 [only build freestanding C++ runtime support]),,
2855 enable_hosted_libstdcxx=no
2858 enable_hosted_libstdcxx=yes
2861 if test "$enable_hosted_libstdcxx" = no; then
2862 AC_MSG_NOTICE([Only freestanding libraries will be built])
2866 enable_libstdcxx_pch=no
2871 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2872 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2873 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2878 dnl Check if the user wants a non-verbose library implementation.
2880 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2881 dnl standard error on termination.
2884 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2886 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2887 AC_ARG_ENABLE([libstdcxx-verbose],
2888 AC_HELP_STRING([--disable-libstdcxx-verbose],
2889 [disable termination messages to standard error]),,
2890 [enable_libstdcxx_verbose=yes])
2891 if test x"$enable_libstdcxx_verbose" = xyes; then
2894 AC_MSG_NOTICE([verbose termination messages are disabled])
2897 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2898 [Define to 1 if a verbose library is built, or 0 otherwise.])
2903 dnl Check for template specializations for the 'long long' type.
2904 dnl The result determines only whether 'long long' I/O is enabled; things
2905 dnl like numeric_limits<> specializations are always available.
2907 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2908 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2909 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2910 dnl Where DEFAULT is either `yes' or `no'.
2912 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2913 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2914 if test $enable_long_long = yes; then
2915 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2916 [Define if code specialized for long long should be used.])
2918 AC_MSG_CHECKING([for enabled long long specializations])
2919 AC_MSG_RESULT([$enable_long_long])
2924 dnl Check for decimal floating point.
2926 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2928 dnl This checks to see if the host supports decimal floating point types.
2931 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2933 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2935 # Fake what AC_TRY_COMPILE does, without linking as this is
2936 # unnecessary for this test.
2938 cat > conftest.$ac_ext << EOF
2939 [#]line __oline__ "configure"
2949 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2950 if AC_TRY_EVAL(ac_compile); then
2951 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2952 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2957 AC_MSG_RESULT($enable_dfp)
2962 dnl Check for GNU 128-bit integer and floating point types.
2964 dnl Note: also checks that the types aren't standard types.
2967 dnl _GLIBCXX_USE_INT128
2968 dnl _GLIBCXX_USE_FLOAT128
2970 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2975 # Fake what AC_TRY_COMPILE does, without linking as this is
2976 # unnecessary for this test.
2978 cat > conftest.$ac_ext << EOF
2979 [#]line __oline__ "configure"
2980 template<typename T1, typename T2>
2982 { typedef T2 type; };
2984 template<typename T>
2989 typename same<long, __int128>::type i1;
2990 typename same<long long, __int128>::type i2;
2994 AC_MSG_CHECKING([for __int128])
2995 if AC_TRY_EVAL(ac_compile); then
2996 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2997 [Define if __int128 is supported on this host.])
3002 AC_MSG_RESULT($enable_int128)
3005 cat > conftest.$ac_ext << EOF
3006 [#]line __oline__ "configure"
3007 template<typename T1, typename T2>
3009 { typedef T2 type; };
3011 template<typename T>
3016 typename same<double, __float128>::type f1;
3017 typename same<long double, __float128>::type f2;
3021 AC_MSG_CHECKING([for __float128])
3022 if AC_TRY_EVAL(ac_compile); then
3023 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
3024 [Define if __float128 is supported on this host.])
3029 AC_MSG_RESULT($enable_float128)
3036 dnl Check for template specializations for the 'wchar_t' type.
3038 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3039 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3040 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3041 dnl Where DEFAULT is either `yes' or `no'.
3043 dnl Necessary support must also be present.
3045 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3046 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3048 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3049 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3050 AC_MSG_CHECKING([for mbstate_t])
3051 AC_TRY_COMPILE([#include <wchar.h>],
3052 [mbstate_t teststate;],
3053 have_mbstate_t=yes, have_mbstate_t=no)
3054 AC_MSG_RESULT($have_mbstate_t)
3055 if test x"$have_mbstate_t" = xyes; then
3056 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3059 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3061 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3063 if test x"$enable_wchar_t" = x"yes"; then
3068 if test x"$ac_has_wchar_h" = xyes &&
3069 test x"$ac_has_wctype_h" = xyes; then
3070 AC_TRY_COMPILE([#include <wchar.h>
3131 ],[],[], [enable_wchar_t=no])
3139 if test x"$enable_wchar_t" = x"yes"; then
3140 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3141 [Define if code specialized for wchar_t should be used.])
3144 AC_MSG_CHECKING([for enabled wchar_t specializations])
3145 AC_MSG_RESULT([$enable_wchar_t])
3150 dnl Check to see if building and using a C++ precompiled header can be done.
3152 dnl --enable-libstdcxx-pch=yes
3153 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3154 dnl may work, after some light-hearted attempts to puzzle out compiler
3155 dnl support, flip bits on in include/Makefile.am
3157 dnl --disable-libstdcxx-pch
3158 dnl turns off attempts to use or build stdc++.h.gch.
3161 dnl glibcxx_PCHFLAGS
3163 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3164 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3165 if test $enable_libstdcxx_pch = yes; then
3166 AC_CACHE_CHECK([for compiler with PCH support],
3167 [glibcxx_cv_prog_CXX_pch],
3168 [ac_save_CXXFLAGS="$CXXFLAGS"
3169 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3172 echo '#include <math.h>' > conftest.h
3173 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3174 -o conftest.h.gch 1>&5 2>&1 &&
3175 echo '#error "pch failed"' > conftest.h &&
3176 echo '#include "conftest.h"' > conftest.cc &&
3177 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3179 glibcxx_cv_prog_CXX_pch=yes
3181 glibcxx_cv_prog_CXX_pch=no
3184 CXXFLAGS=$ac_save_CXXFLAGS
3187 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3190 AC_MSG_CHECKING([for enabled PCH])
3191 AC_MSG_RESULT([$enable_libstdcxx_pch])
3193 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3194 if test $enable_libstdcxx_pch = yes; then
3195 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3199 AC_SUBST(glibcxx_PCHFLAGS)
3204 dnl Check for atomic builtins.
3206 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3208 dnl This checks to see if the host supports the compiler-generated
3209 dnl builtins for atomic operations for various integral sizes. Note, this
3210 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3211 dnl that are used should be checked.
3214 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3216 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3219 old_CXXFLAGS="$CXXFLAGS"
3221 # Do link tests if possible, instead asm tests, limited to some platforms
3222 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3223 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3224 atomic_builtins_link_tests=no
3225 if test x$gcc_no_link != xyes; then
3226 # Can do link tests. Limit to some tested platforms
3228 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3229 atomic_builtins_link_tests=yes
3234 if test x$atomic_builtins_link_tests = xyes; then
3238 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3240 AC_MSG_CHECKING([for atomic builtins for bool])
3241 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3244 [typedef bool atomic_type;
3248 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3249 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3251 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3252 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3254 [glibcxx_cv_atomic_bool=yes],
3255 [glibcxx_cv_atomic_bool=no])
3257 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3259 AC_MSG_CHECKING([for atomic builtins for short])
3260 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3263 [typedef short atomic_type;
3267 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3268 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3270 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3271 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3273 [glibcxx_cv_atomic_short=yes],
3274 [glibcxx_cv_atomic_short=no])
3276 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3278 AC_MSG_CHECKING([for atomic builtins for int])
3279 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3282 [typedef int atomic_type;
3286 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3287 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3289 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3290 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3292 [glibcxx_cv_atomic_int=yes],
3293 [glibcxx_cv_atomic_int=no])
3295 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3297 AC_MSG_CHECKING([for atomic builtins for long long])
3298 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3301 [typedef long long atomic_type;
3305 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3306 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3308 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3309 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3311 [glibcxx_cv_atomic_long_long=yes],
3312 [glibcxx_cv_atomic_long_long=no])
3314 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3320 # Compile unoptimized.
3323 # Fake what AC_TRY_COMPILE does.
3325 cat > conftest.$ac_ext << EOF
3326 [#]line __oline__ "configure"
3329 typedef bool atomic_type;
3333 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3334 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3336 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3337 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3343 AC_MSG_CHECKING([for atomic builtins for bool])
3344 if AC_TRY_EVAL(ac_compile); then
3345 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3346 glibcxx_cv_atomic_bool=no
3348 glibcxx_cv_atomic_bool=yes
3351 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3354 cat > conftest.$ac_ext << EOF
3355 [#]line __oline__ "configure"
3358 typedef short atomic_type;
3362 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3363 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3365 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3366 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3372 AC_MSG_CHECKING([for atomic builtins for short])
3373 if AC_TRY_EVAL(ac_compile); then
3374 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3375 glibcxx_cv_atomic_short=no
3377 glibcxx_cv_atomic_short=yes
3380 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3383 cat > conftest.$ac_ext << EOF
3384 [#]line __oline__ "configure"
3387 // NB: _Atomic_word not necessarily int.
3388 typedef int atomic_type;
3392 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3393 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3395 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3396 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3402 AC_MSG_CHECKING([for atomic builtins for int])
3403 if AC_TRY_EVAL(ac_compile); then
3404 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3405 glibcxx_cv_atomic_int=no
3407 glibcxx_cv_atomic_int=yes
3410 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3413 cat > conftest.$ac_ext << EOF
3414 [#]line __oline__ "configure"
3417 typedef long long atomic_type;
3421 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3422 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3424 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3425 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3431 AC_MSG_CHECKING([for atomic builtins for long long])
3432 if AC_TRY_EVAL(ac_compile); then
3433 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3434 glibcxx_cv_atomic_long_long=no
3436 glibcxx_cv_atomic_long_long=yes
3439 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3444 CXXFLAGS="$old_CXXFLAGS"
3447 # Set atomicity_dir to builtins if all but the long long test above passes.
3448 if test "$glibcxx_cv_atomic_bool" = yes \
3449 && test "$glibcxx_cv_atomic_short" = yes \
3450 && test "$glibcxx_cv_atomic_int" = yes; then
3451 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3452 [Define if the compiler supports C++11 atomics.])
3453 atomicity_dir=cpu/generic/atomicity_builtins
3456 # If still generic, set to mutex.
3457 if test $atomicity_dir = "cpu/generic" ; then
3458 atomicity_dir=cpu/generic/atomicity_mutex
3459 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3460 if test "x$target_thread_file" = xsingle; then
3461 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3462 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3464 AC_MSG_WARN([They will be faked using a mutex.])
3465 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3473 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3475 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3476 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3477 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3478 dnl Where DEFAULT is 'yes'.
3480 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3481 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3483 if test x$enable_libstdcxx_visibility = xyes ; then
3484 dnl all hail libgfortran
3485 dnl Check whether the target supports hidden visibility.
3486 AC_CACHE_CHECK([whether the target supports hidden visibility],
3487 glibcxx_cv_have_attribute_visibility, [
3488 save_CFLAGS="$CFLAGS"
3489 CFLAGS="$CFLAGS -Werror"
3490 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3491 [], glibcxx_cv_have_attribute_visibility=yes,
3492 glibcxx_cv_have_attribute_visibility=no)
3493 CFLAGS="$save_CFLAGS"])
3494 if test $glibcxx_cv_have_attribute_visibility = no; then
3495 enable_libstdcxx_visibility=no
3499 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3500 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3505 dnl Add version tags to symbols in shared library (or not), additionally
3506 dnl marking other symbols as private/local (or not).
3508 dnl Sets libtool_VERSION, and determines shared library SONAME.
3510 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3512 dnl --enable-symvers=style adds a version script to the linker call when
3513 dnl creating the shared library. The choice of version script is
3514 dnl controlled by 'style'.
3515 dnl --disable-symvers does not.
3517 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3518 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3519 dnl choose a default style based on linker characteristics. Passing
3520 dnl 'no' disables versioning.
3522 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3524 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3525 [enables symbol versioning of the shared library],
3526 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3528 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3529 # don't know enough about $LD to do tricks...
3530 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3531 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3532 # with extern "C++" in version scripts.
3533 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3535 # Turn a 'yes' into a suitable default.
3536 if test x$enable_symvers = xyes ; then
3537 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3540 if test $with_gnu_ld = yes ; then
3541 case ${target_os} in
3543 enable_symvers=no ;;
3545 enable_symvers=gnu ;;
3548 case ${target_os} in
3550 enable_symvers=darwin ;;
3551 # Sun symbol versioning exists since Solaris 2.5.
3552 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3553 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3554 # version scripts, so disable symbol versioning if none can be
3556 if test -z "$ac_cv_path_CXXFILT"; then
3557 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3558 AC_MSG_WARN([=== no GNU c++filt could be found.])
3559 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3566 enable_symvers=no ;;
3572 # Check to see if 'darwin' or 'darwin-export' can win.
3573 if test x$enable_symvers = xdarwin-export ; then
3574 enable_symvers=darwin
3577 # Check if 'sun' was requested on non-Solaris 2 platforms.
3578 if test x$enable_symvers = xsun ; then
3579 case ${target_os} in
3585 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3586 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3587 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3593 # Check to see if 'gnu' can win.
3594 if test $enable_symvers = gnu ||
3595 test $enable_symvers = gnu-versioned-namespace ||
3596 test $enable_symvers = sun; then
3597 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3598 AC_MSG_CHECKING([for shared libgcc])
3599 ac_save_CFLAGS="$CFLAGS"
3601 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3602 CFLAGS="$ac_save_CFLAGS"
3603 if test $glibcxx_shared_libgcc = no; then
3604 cat > conftest.c <<EOF
3605 int main (void) { return 0; }
3608 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3609 -shared -shared-libgcc -o conftest.so \
3610 conftest.c -v 2>&1 >/dev/null \
3611 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3613 rm -f conftest.c conftest.so
3614 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3615 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3616 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3617 CFLAGS="$ac_save_CFLAGS"
3620 AC_MSG_RESULT($glibcxx_shared_libgcc)
3622 # For GNU ld, we need at least this version. The format is described in
3623 # GLIBCXX_CHECK_LINKER_FEATURES above.
3624 glibcxx_min_gnu_ld_version=21400
3626 # If no shared libgcc, can't win.
3627 if test $glibcxx_shared_libgcc != yes; then
3628 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3629 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3630 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3632 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3633 : All interesting versions of Sun ld support sun style symbol versioning.
3634 elif test $with_gnu_ld != yes ; then
3636 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3637 AC_MSG_WARN([=== you are not using the GNU linker.])
3638 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3640 elif test $glibcxx_ld_is_gold = yes ; then
3641 : All versions of gold support symbol versioning.
3642 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3643 # The right tools, the right setup, but too old. Fallbacks?
3644 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3645 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3646 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3647 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3648 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3653 # For libtool versioning info, format is CURRENT:REVISION:AGE
3654 libtool_VERSION=6:22:0
3656 # Everything parsed; figure out what files and settings to use.
3657 case $enable_symvers in
3659 SYMVER_FILE=config/abi/pre/none.ver
3662 SYMVER_FILE=config/abi/pre/gnu.ver
3663 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3664 [Define to use GNU versioning in the shared library.])
3666 gnu-versioned-namespace)
3667 libtool_VERSION=7:0:0
3668 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3669 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3670 [Define to use GNU namespace versioning in the shared library.])
3673 SYMVER_FILE=config/abi/pre/gnu.ver
3674 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3675 [Define to use darwin versioning in the shared library.])
3678 SYMVER_FILE=config/abi/pre/gnu.ver
3679 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3680 [Define to use Sun versioning in the shared library.])
3684 if test x$enable_symvers != xno ; then
3685 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3686 [Define to use symbol versioning in the shared library.])
3689 AC_CACHE_CHECK([whether the target supports .symver directive],
3690 glibcxx_cv_have_as_symver_directive, [
3691 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3692 [], glibcxx_cv_have_as_symver_directive=yes,
3693 glibcxx_cv_have_as_symver_directive=no)])
3694 if test $glibcxx_cv_have_as_symver_directive = yes; then
3695 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3696 [Define to 1 if the target assembler supports .symver directive.])
3699 AC_SUBST(SYMVER_FILE)
3700 AC_SUBST(port_specific_symbol_files)
3701 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3702 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3703 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3704 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3705 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3706 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3708 if test $enable_symvers != no ; then
3709 case ${target_os} in
3710 # The Solaris 2 runtime linker doesn't support the GNU extension of
3711 # binding the same symbol to different versions
3714 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3716 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3717 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3722 # Now, set up compatibility support, if any.
3723 # In addition, need this to deal with std::size_t mangling in
3724 # src/compatibility.cc. In a perfect world, could use
3725 # typeid(std::size_t).name()[0] to do direct substitution.
3726 AC_MSG_CHECKING([for size_t as unsigned int])
3727 ac_save_CFLAGS="$CFLAGS"
3729 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3730 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3731 CFLAGS=$ac_save_CFLAGS
3732 if test "$glibcxx_size_t_is_i" = yes; then
3733 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3735 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3737 AC_MSG_CHECKING([for ptrdiff_t as int])
3738 ac_save_CFLAGS="$CFLAGS"
3740 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3741 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3742 CFLAGS=$ac_save_CFLAGS
3743 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3744 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3746 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3751 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3752 dnl We must stage the required headers so that they will be installed
3753 dnl with the library (unlike libgcc, the STL implementation is provided
3754 dnl solely within headers). Since we must not inject random user-space
3755 dnl macro names into user-provided C++ code, we first stage into <file>-in
3756 dnl and process to <file> with an output command. The reason for a two-
3757 dnl stage process here is to correctly handle $srcdir!=$objdir without
3758 dnl having to write complex code (the sed commands to clean the macro
3759 dnl namespace are complex and fragile enough as it is). We must also
3760 dnl add a relative path so that -I- is supported properly.
3765 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3766 AC_MSG_CHECKING([for thread model used by GCC])
3767 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3768 AC_MSG_RESULT([$target_thread_file])
3769 GCC_AC_THREAD_HEADER([$target_thread_file])
3774 dnl Check if gthread implementation defines the types and functions
3775 dnl required by the c++0x thread library. Conforming gthread
3776 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3778 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3780 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3781 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3783 if test x$enable_libstdcxx_threads = xauto ||
3784 test x$enable_libstdcxx_threads = xyes; then
3789 ac_save_CXXFLAGS="$CXXFLAGS"
3790 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3791 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3793 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3794 case $target_thread_file in
3796 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3799 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3801 AC_TRY_COMPILE([#include <unistd.h>],
3803 // In case of POSIX threads check _POSIX_TIMEOUTS.
3804 #if (defined(_PTHREADS) \
3805 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3808 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3810 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3811 [Define to 1 if mutex_timedlock is available.])
3813 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3814 else res_mutex_timedlock=no ; fi
3815 AC_MSG_RESULT([$res_mutex_timedlock])
3817 AC_MSG_CHECKING([for gthreads library])
3819 AC_TRY_COMPILE([#include "gthr.h"],
3821 #ifndef __GTHREADS_CXX0X
3824 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3829 AC_MSG_RESULT([$ac_has_gthreads])
3831 if test x"$ac_has_gthreads" = x"yes"; then
3832 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3833 [Define if gthreads library is available.])
3835 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3836 AC_CHECK_TYPE([pthread_rwlock_t],
3837 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3838 [Define if POSIX read/write locks are available in <gthr.h>.])],
3840 [#include "gthr.h"])
3843 CXXFLAGS="$ac_save_CXXFLAGS"
3848 # Check whether LC_MESSAGES is available in <locale.h>.
3849 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3851 # This file file be copied and used freely without restrictions. It can
3852 # be used in projects which are not available under the GNU Public License
3853 # but which still want to provide support for the GNU gettext functionality.
3854 # Please note that the actual code is *not* freely available.
3855 AC_DEFUN([AC_LC_MESSAGES], [
3856 AC_CHECK_HEADER(locale.h, [
3857 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3858 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3859 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3860 if test $ac_cv_val_LC_MESSAGES = yes; then
3861 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3862 [Define if LC_MESSAGES is available in <locale.h>.])
3868 dnl Check whether rdrand is supported in the assembler.
3869 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3870 AC_MSG_CHECKING([for rdrand support in assembler])
3871 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3876 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3877 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3880 if test $ac_cv_x86_rdrand = yes; then
3881 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3882 [ Defined if as can handle rdrand. ])
3884 AC_MSG_RESULT($ac_cv_x86_rdrand)
3888 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3890 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3894 ac_save_CXXFLAGS="$CXXFLAGS"
3895 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3897 AC_MSG_CHECKING([for get_nprocs])
3898 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3899 GCC_TRY_COMPILE_OR_LINK(
3900 [#include <sys/sysinfo.h>],
3901 [int n = get_nprocs();],
3902 [glibcxx_cv_GET_NPROCS=yes],
3903 [glibcxx_cv_GET_NPROCS=no])
3905 if test $glibcxx_cv_GET_NPROCS = yes; then
3906 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3908 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3910 CXXFLAGS="$ac_save_CXXFLAGS"
3915 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3917 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3921 ac_save_CXXFLAGS="$CXXFLAGS"
3922 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3924 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3925 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3926 GCC_TRY_COMPILE_OR_LINK(
3927 [#include <unistd.h>],
3928 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3929 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3930 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3932 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3933 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3935 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3937 CXXFLAGS="$ac_save_CXXFLAGS"
3942 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3944 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3948 ac_save_CXXFLAGS="$CXXFLAGS"
3949 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3951 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3952 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3953 GCC_TRY_COMPILE_OR_LINK(
3954 [#include <unistd.h>],
3955 [int n = sysconf(_SC_NPROC_ONLN);],
3956 [glibcxx_cv_SC_NPROC_ONLN=yes],
3957 [glibcxx_cv_SC_NPROC_ONLN=no])
3959 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3960 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3962 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3964 CXXFLAGS="$ac_save_CXXFLAGS"
3969 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3971 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3975 ac_save_CXXFLAGS="$CXXFLAGS"
3976 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3978 AC_MSG_CHECKING([for pthreads_num_processors_np])
3979 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3980 GCC_TRY_COMPILE_OR_LINK(
3981 [#include <pthread.h>],
3982 [int n = pthread_num_processors_np();],
3983 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3984 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3986 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3987 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3989 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3991 CXXFLAGS="$ac_save_CXXFLAGS"
3996 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3998 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4002 ac_save_CXXFLAGS="$CXXFLAGS"
4003 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4005 AC_MSG_CHECKING([for hw.ncpu sysctl])
4006 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4007 GCC_TRY_COMPILE_OR_LINK(
4010 #include <sys/sysctl.h>
4014 size_t size = sizeof(count);
4015 int mib[] = { CTL_HW, HW_NCPU };
4016 sysctl(mib, 2, &count, &size, NULL, 0);
4018 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4019 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4021 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4022 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4024 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4026 CXXFLAGS="$ac_save_CXXFLAGS"
4031 dnl Check to see if python pretty printing can be activated.
4033 dnl --with-python-dir=dir
4034 dnl installs directory into $prefix/dir
4035 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4037 AC_MSG_CHECKING([for custom python install directory])
4038 AC_ARG_WITH([python-dir],
4039 AS_HELP_STRING([--with-python-dir],
4040 [the location to install Python modules. This path is relative starting from the prefix.]),
4041 [with_python_dir=$withval], [with_python_dir="no"])
4042 AC_MSG_RESULT(${with_python_dir})
4044 # Needed for installing Python modules during make install.
4045 python_mod_dir="${with_python_dir}"
4046 AC_SUBST(python_mod_dir)
4047 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4051 dnl Check to see if -Werror is disabled.
4053 dnl --enable-werror/--disable-werror
4054 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4055 AC_MSG_CHECKING([for -Werror])
4056 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4057 AC_MSG_RESULT($enable_werror)
4058 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4062 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4063 dnl and define _GLIBCXX_USE_TMPNAM.
4065 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4069 ac_save_CXXFLAGS="$CXXFLAGS"
4070 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4072 AC_MSG_CHECKING([for tmpnam])
4073 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4074 GCC_TRY_COMPILE_OR_LINK(
4075 [#include <stdio.h>],
4076 [char *tmp = tmpnam(NULL);],
4077 [glibcxx_cv_TMPNAM=yes],
4078 [glibcxx_cv_TMPNAM=no])
4080 if test $glibcxx_cv_TMPNAM = yes; then
4081 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4083 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4085 CXXFLAGS="$ac_save_CXXFLAGS"
4090 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4091 dnl Some versions of sdt.h were not compatible with C++11.
4093 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4094 AC_MSG_CHECKING([for suitable sys/sdt.h])
4095 # Note that this test has to be run with the C language.
4096 # Otherwise, sdt.h will try to include some headers from
4100 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4101 # Because we have to run the test in C, we use grep rather
4102 # than the compiler to check for the bug. The bug is that
4103 # were strings without trailing whitespace, causing g++
4104 # to look for operator"". The pattern searches for the fixed
4106 AC_EGREP_CPP([ \",\" ], [
4107 #include <sys/sdt.h>
4108 int f() { STAP_PROBE(hi, bob); }
4109 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4112 if test $glibcxx_cv_sys_sdt_h = yes; then
4113 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4114 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4116 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4120 dnl Control whether the library should define symbols for old and new ABIs.
4121 dnl This affects definitions of strings, stringstreams and locale facets.
4123 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4126 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4128 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4129 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4130 if test x$enable_symvers = xgnu-versioned-namespace; then
4131 # gnu-versioned-namespace is incompatible with the dual ABI.
4132 enable_libstdcxx_dual_abi="no"
4134 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4135 AC_MSG_NOTICE([dual ABI is disabled])
4136 default_libstdcxx_abi="gcc4-compatible"
4138 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4142 dnl Check to see which ABI should be enabled by default.
4144 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4147 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4149 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4150 if test x$enable_libstdcxx_dual_abi = xyes; then
4151 AC_MSG_CHECKING([for default std::string ABI to use])
4152 AC_ARG_WITH([default-libstdcxx-abi],
4153 AS_HELP_STRING([--with-default-libstdcxx-abi],
4154 [set the std::string ABI to use by default]),
4156 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4157 new|cxx11) default_libstdcxx_abi="new" ;;
4158 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4159 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4162 [default_libstdcxx_abi="new"])
4163 AC_MSG_RESULT(${default_libstdcxx_abi})
4165 if test $default_libstdcxx_abi = "new"; then
4172 AC_SUBST(glibcxx_cxx98_abi)
4173 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4177 dnl Check to see whether to build libstdc++fs.a
4179 dnl --enable-libstdcxx-filesystem-ts
4181 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4182 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4183 [turns on ISO/IEC TS 18822 support],
4184 [permit yes|no|auto])
4186 AC_MSG_CHECKING([whether to build Filesystem TS support])
4187 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4188 enable_libstdcxx_filesystem_ts=no
4190 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4191 case "${target_os}" in
4192 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4193 enable_libstdcxx_filesystem_ts=yes
4195 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
4196 enable_libstdcxx_filesystem_ts=yes
4199 enable_libstdcxx_filesystem_ts=yes
4202 enable_libstdcxx_filesystem_ts=no
4206 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4207 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4211 dnl Check whether the library calls required by the Filesystem TS are present
4212 dnl and define _GLIBCXX_USE_REALPATH and _GLIBCXX_USE_UTIMENSAT.
4214 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4218 ac_save_CXXFLAGS="$CXXFLAGS"
4219 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4221 AC_MSG_CHECKING([for struct dirent.d_type])
4222 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4223 GCC_TRY_COMPILE_OR_LINK(
4224 [#include <dirent.h>],
4227 if (sizeof d.d_type) return 0;
4229 [glibcxx_cv_dirent_d_type=yes],
4230 [glibcxx_cv_dirent_d_type=no])
4232 if test $glibcxx_cv_dirent_d_type = yes; then
4233 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4235 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
4237 AC_MSG_CHECKING([for realpath])
4238 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4239 GCC_TRY_COMPILE_OR_LINK(
4245 #if _XOPEN_VERSION < 500
4247 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4248 char *tmp = realpath((const char*)NULL, (char*)NULL);
4253 [glibcxx_cv_realpath=yes],
4254 [glibcxx_cv_realpath=no])
4256 if test $glibcxx_cv_realpath = yes; then
4257 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4259 AC_MSG_RESULT($glibcxx_cv_realpath)
4261 AC_MSG_CHECKING([for utimensat])
4262 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4263 GCC_TRY_COMPILE_OR_LINK(
4266 #include <sys/stat.h>
4269 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4270 int i = utimensat(AT_FDCWD, "path", ts, 0);
4272 [glibcxx_cv_utimensat=yes],
4273 [glibcxx_cv_utimensat=no])
4275 if test $glibcxx_cv_utimensat = yes; then
4276 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4278 AC_MSG_RESULT($glibcxx_cv_utimensat)
4280 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4281 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4282 GCC_TRY_COMPILE_OR_LINK(
4283 [ #include <sys/stat.h> ],
4286 return st.st_mtim.tv_nsec;
4288 [glibcxx_cv_st_mtim=yes],
4289 [glibcxx_cv_st_mtim=no])
4291 if test $glibcxx_cv_st_mtim = yes; then
4292 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4294 AC_MSG_RESULT($glibcxx_cv_st_mtim)
4296 AC_MSG_CHECKING([for fchmod])
4297 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4298 GCC_TRY_COMPILE_OR_LINK(
4299 [#include <sys/stat.h>],
4300 [fchmod(1, S_IWUSR);],
4301 [glibcxx_cv_fchmod=yes],
4302 [glibcxx_cv_fchmod=no])
4304 if test $glibcxx_cv_fchmod = yes; then
4305 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4307 AC_MSG_RESULT($glibcxx_cv_fchmod)
4309 AC_MSG_CHECKING([for fchmodat])
4310 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4311 GCC_TRY_COMPILE_OR_LINK(
4314 #include <sys/stat.h>
4316 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4317 [glibcxx_cv_fchmodat=yes],
4318 [glibcxx_cv_fchmodat=no])
4320 if test $glibcxx_cv_fchmodat = yes; then
4321 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4323 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4325 AC_MSG_CHECKING([for sendfile that can copy files])
4326 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4327 case "${target_os}" in
4328 gnu* | linux* | solaris*)
4329 GCC_TRY_COMPILE_OR_LINK(
4330 [#include <sys/sendfile.h>],
4331 [sendfile(1, 2, (off_t*)NULL, sizeof 1);],
4332 [glibcxx_cv_sendfile=yes],
4333 [glibcxx_cv_sendfile=no])
4336 glibcxx_cv_sendfile=no
4340 if test $glibcxx_cv_sendfile = yes; then
4341 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/stat.h>.])
4343 AC_MSG_RESULT($glibcxx_cv_sendfile)
4345 CXXFLAGS="$ac_save_CXXFLAGS"
4350 dnl Check how size_t is mangled. Copied from libitm.
4352 AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4353 AC_CACHE_CHECK([how size_t is mangled],
4354 glibcxx_cv_size_t_mangling, [
4355 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4356 [glibcxx_cv_size_t_mangling=m], [
4357 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4358 [glibcxx_cv_size_t_mangling=j], [
4360 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4361 [glibcxx_cv_size_t_mangling=y], [
4363 [extern __SIZE_TYPE__ x; extern unsigned short x;],
4364 [glibcxx_cv_size_t_mangling=t],
4365 [glibcxx_cv_size_t_mangling=x])
4370 if test $glibcxx_cv_size_t_mangling = x; then
4371 AC_MSG_ERROR([Unknown underlying type for size_t])
4373 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4374 [Define to the letter to which size_t is mangled.])
4377 # Macros from the top-level gcc directory.
4378 m4_include([../config/gc++filt.m4])
4379 m4_include([../config/tls.m4])
4380 m4_include([../config/gthr.m4])