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 $host.
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_builddir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/c++20 src/filesystem doc po testsuite python])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${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 -ffunction-sections -fdata-sections
144 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
145 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
146 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
147 if test "$ac_test_CXXFLAGS" = set; then
148 CXXFLAGS="$ac_save_CXXFLAGS"
150 # this is the suspicious part
153 if test x"$ac_fdsections" = x"yes"; then
154 SECTION_FLAGS='-ffunction-sections -fdata-sections'
156 AC_MSG_RESULT($ac_fdsections)
159 AC_SUBST(SECTION_FLAGS)
164 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
165 dnl the native linker is in use, all variables will be defined to something
166 dnl safe (like an empty string).
169 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
170 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
171 dnl LD (as a side effect of testing)
174 dnl glibcxx_ld_is_gold (set to "no" or "yes")
175 dnl glibcxx_gnu_ld_version (possibly)
177 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
178 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
180 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
181 # If we're not using GNU ld, then there's no point in even trying these
182 # tests. Check for that first. We should have already tested for gld
183 # by now (in libtool), but require it now just to be safe...
184 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
185 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
186 AC_REQUIRE([AC_PROG_LD])
187 AC_REQUIRE([AC_PROG_AWK])
189 # The name set by libtool depends on the version of libtool. Shame on us
190 # for depending on an impl detail, but c'est la vie. Older versions used
191 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
192 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
193 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
194 # set (hence we're using an older libtool), then set it.
195 if test x${with_gnu_ld+set} != xset; then
196 if test x${ac_cv_prog_gnu_ld+set} != xset; then
197 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
200 with_gnu_ld=$ac_cv_prog_gnu_ld
204 # Start by getting the version number. I think the libtool test already
205 # does some of this, but throws away the result.
206 glibcxx_ld_is_gold=no
207 if test x"$with_gnu_ld" = x"yes"; then
208 AC_MSG_CHECKING([for ld version])
210 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
211 glibcxx_ld_is_gold=yes
213 ldver=`$LD --version 2>/dev/null |
214 sed -e 's/[. ][0-9]\{8\}$//;s/.* \([^ ]\{1,\}\)$/\1/; q'`
216 glibcxx_gnu_ld_version=`echo $ldver | \
217 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
218 AC_MSG_RESULT($glibcxx_gnu_ld_version)
222 glibcxx_have_gc_sections=no
223 if test "$glibcxx_ld_is_gold" = "yes"; then
224 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
225 glibcxx_have_gc_sections=yes
228 glibcxx_gcsections_min_ld=21602
229 if test x"$with_gnu_ld" = x"yes" &&
230 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
231 glibcxx_have_gc_sections=yes
234 if test "$glibcxx_have_gc_sections" = "yes"; then
235 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
236 # NB: This flag only works reliably after 2.16.1. Configure tests
237 # for this are difficult, so hard wire a value that should work.
239 ac_test_CFLAGS="${CFLAGS+set}"
240 ac_save_CFLAGS="$CFLAGS"
241 CFLAGS='-Wl,--gc-sections'
243 # Check for -Wl,--gc-sections
244 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
245 AC_TRY_LINK([ int one(void) { return 1; }
246 int two(void) { return 2; }
247 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
248 if test "$ac_gcsections" = "yes"; then
251 if $CC -c conftest.c; then
252 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
253 grep "Warning: gc-sections option ignored" > /dev/null; then
257 rm -f conftest.c conftest.o conftest
259 if test "$ac_gcsections" = "yes"; then
260 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
262 AC_MSG_RESULT($ac_gcsections)
264 if test "$ac_test_CFLAGS" = set; then
265 CFLAGS="$ac_save_CFLAGS"
267 # this is the suspicious part
273 # Note this is only for shared objects.
275 if test x"$with_gnu_ld" = x"yes"; then
276 # cygwin and mingw uses PE, which has no ELF relro support,
277 # multi target ld may confuse configure machinery
284 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
285 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
286 if test -n "$cxx_z_relo"; then
287 OPT_LDFLAGS="-Wl,-z,relro"
290 AC_MSG_RESULT($ac_ld_relro)
294 # Set linker optimization flags.
295 if test x"$with_gnu_ld" = x"yes"; then
296 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
299 AC_SUBST(SECTION_LDFLAGS)
300 AC_SUBST(OPT_LDFLAGS)
305 dnl Check for headers for, and arguments to, the setrlimit() function.
306 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
309 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
310 dnl various HAVE_LIMIT_* for individual limit names
312 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
313 AC_MSG_CHECKING([for RLIMIT_$1])
316 #include <sys/time.h>
317 #include <sys/resource.h>
319 [ int f = RLIMIT_$1 ; ],
320 [glibcxx_mresult=1], [glibcxx_mresult=0])
321 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
322 [Only used in build directory testsuite_hooks.h.])
323 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
327 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
330 setrlimit_have_headers=yes
331 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
333 [setrlimit_have_headers=no])
334 # If don't have the headers, then we can't run the tests now, and we
335 # won't be seeing any of these during testsuite compilation.
336 if test $setrlimit_have_headers = yes; then
337 # Can't do these in a loop, else the resulting syntax is wrong.
338 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
339 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
340 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
341 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
342 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
344 # Check for rlimit, setrlimit.
345 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
348 #include <sys/time.h>
349 #include <sys/resource.h>
353 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
357 AC_MSG_CHECKING([for testsuite resource limits support])
358 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
360 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
361 [Define if using setrlimit to set resource limits during
367 AC_MSG_RESULT($ac_res_limits)
372 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
373 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
375 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
379 ac_save_CXXFLAGS="$CXXFLAGS"
380 CXXFLAGS="$CXXFLAGS -fno-exceptions"
382 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
383 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
384 GCC_TRY_COMPILE_OR_LINK(
385 [#include <sys/stat.h>],
388 S_ISREG(buffer.st_mode);],
389 [glibcxx_cv_S_ISREG=yes],
390 [glibcxx_cv_S_ISREG=no])
392 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
393 GCC_TRY_COMPILE_OR_LINK(
394 [#include <sys/stat.h>],
397 S_IFREG & buffer.st_mode;],
398 [glibcxx_cv_S_IFREG=yes],
399 [glibcxx_cv_S_IFREG=no])
402 if test $glibcxx_cv_S_ISREG = yes; then
403 AC_DEFINE(HAVE_S_ISREG, 1,
404 [Define if S_ISREG is available in <sys/stat.h>.])
406 elif test $glibcxx_cv_S_IFREG = yes; then
407 AC_DEFINE(HAVE_S_IFREG, 1,
408 [Define if S_IFREG is available in <sys/stat.h>.])
413 CXXFLAGS="$ac_save_CXXFLAGS"
419 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
421 AC_DEFUN([GLIBCXX_CHECK_POLL], [
425 ac_save_CXXFLAGS="$CXXFLAGS"
426 CXXFLAGS="$CXXFLAGS -fno-exceptions"
428 AC_MSG_CHECKING([for poll])
429 AC_CACHE_VAL(glibcxx_cv_POLL, [
430 GCC_TRY_COMPILE_OR_LINK(
432 [struct pollfd pfd[1];
433 pfd[0].events = POLLIN;
435 [glibcxx_cv_POLL=yes],
436 [glibcxx_cv_POLL=no])
438 if test $glibcxx_cv_POLL = yes; then
439 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
441 AC_MSG_RESULT($glibcxx_cv_POLL)
443 CXXFLAGS="$ac_save_CXXFLAGS"
449 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
451 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
455 ac_save_CXXFLAGS="$CXXFLAGS"
456 CXXFLAGS="$CXXFLAGS -fno-exceptions"
458 AC_MSG_CHECKING([for writev])
459 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
460 GCC_TRY_COMPILE_OR_LINK(
461 [#include <sys/uio.h>],
462 [struct iovec iov[2];
464 [glibcxx_cv_WRITEV=yes],
465 [glibcxx_cv_WRITEV=no])
467 if test $glibcxx_cv_WRITEV = yes; then
468 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
470 AC_MSG_RESULT($glibcxx_cv_WRITEV)
472 CXXFLAGS="$ac_save_CXXFLAGS"
478 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
479 dnl Also check whether int64_t is actually a typedef to long or long long.
481 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
486 AC_MSG_CHECKING([for int64_t])
487 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
489 [#include <stdint.h>],
491 [glibcxx_cv_INT64_T=yes],
492 [glibcxx_cv_INT64_T=no])
495 if test $glibcxx_cv_INT64_T = yes; then
496 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
497 AC_MSG_RESULT($glibcxx_cv_INT64_T)
499 AC_MSG_CHECKING([for int64_t as long])
500 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
503 template<typename, typename> struct same { enum { value = -1 }; };
504 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
505 int array[same<int64_t, long>::value];], [],
506 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
509 if test $glibcxx_cv_int64_t_long = yes; then
510 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
511 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
514 AC_MSG_CHECKING([for int64_t as long long])
515 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
518 template<typename, typename> struct same { enum { value = -1 }; };
519 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
520 int array[same<int64_t, long long>::value];], [],
521 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
524 if test $glibcxx_cv_int64_t_long_long = yes; then
525 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
526 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
535 dnl Check whether LFS support is available.
537 AC_DEFUN([GLIBCXX_CHECK_LFS], [
540 ac_save_CXXFLAGS="$CXXFLAGS"
541 CXXFLAGS="$CXXFLAGS -fno-exceptions"
542 AC_MSG_CHECKING([for LFS support])
543 AC_CACHE_VAL(glibcxx_cv_LFS, [
544 GCC_TRY_COMPILE_OR_LINK(
547 #include <sys/stat.h>
551 fseeko64(fp, 0, SEEK_CUR);
553 lseek64(1, 0, SEEK_CUR);
556 [glibcxx_cv_LFS=yes],
559 if test $glibcxx_cv_LFS = yes; then
560 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
562 AC_MSG_RESULT($glibcxx_cv_LFS)
563 CXXFLAGS="$ac_save_CXXFLAGS"
569 dnl Check for whether a fully dynamic basic_string implementation should
570 dnl be turned on, that does not put empty objects in per-process static
571 dnl memory (mostly useful together with shared memory allocators, see PR
572 dnl libstdc++/16612 for details).
574 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
575 dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
576 dnl otherwise undefined
577 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
578 dnl Where DEFAULT is either `yes' or `no'.
580 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
581 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
582 if test $enable_fully_dynamic_string = yes; then
583 enable_fully_dynamic_string_def=1
585 enable_fully_dynamic_string_def=0
587 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
588 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
593 dnl Does any necessary configuration of the testsuite directory. Generates
594 dnl the testsuite_hooks.h header.
596 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
600 dnl GLIBCXX_TEST_WCHAR_T
601 dnl GLIBCXX_TEST_THREAD
604 dnl baseline_subdir_switch
606 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
607 # Do checks for resource limit functions.
608 GLIBCXX_CHECK_SETRLIMIT
610 if $GLIBCXX_IS_NATIVE ; then
611 # Look for setenv, so that extended locale tests can be performed.
612 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
615 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
616 test $enable_symvers != no; then
619 enable_abi_check=no ;;
621 enable_abi_check=yes ;;
624 # Only build this as native, since automake does not understand
629 # Export file names for ABI checking.
630 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
631 AC_SUBST(baseline_dir)
632 baseline_subdir_switch="$abi_baseline_subdir_switch"
633 AC_SUBST(baseline_subdir_switch)
638 dnl Does any necessary configuration for docbook in the docs directory.
640 dnl XSLTPROC must be set before this
643 dnl glibcxx_stylesheets
647 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
649 glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/
651 AC_MSG_CHECKING([for local stylesheet directory])
652 glibcxx_local_stylesheets=no
653 if test x${XMLCATALOG} = xyes && xsl_style_dir=`xmlcatalog "" $glibcxx_docbook_url 2>/dev/null`
655 XSL_STYLE_DIR=`echo $xsl_style_dir | sed -n 's;^file://;;p'`
656 glibcxx_local_stylesheets=yes
659 /usr/share/sgml/docbook/xsl-ns-stylesheets \
660 /usr/share/xml/docbook/stylesheet/docbook-xsl-ns \
661 /usr/share/xml/docbook/stylesheet/nwalsh5/current \
662 /usr/share/xml/docbook/stylesheet/nwalsh/current
664 if test -d $dir; then
665 glibcxx_local_stylesheets=yes
671 AC_MSG_RESULT($glibcxx_local_stylesheets)
673 if test x"$glibcxx_local_stylesheets" = x"yes"; then
674 AC_SUBST(XSL_STYLE_DIR)
675 AC_MSG_NOTICE($XSL_STYLE_DIR)
677 AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
678 glibcxx_stylesheets=no
679 if test x${XMLCATALOG} = xno || xmlcatalog "" $glibcxx_docbook_url/xhtml/docbook.xsl >/dev/null 2>&1; then
680 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude $glibcxx_docbook_url/xhtml/docbook.xsl - 2>/dev/null; then
681 glibcxx_stylesheets=yes
684 AC_MSG_RESULT($glibcxx_stylesheets)
687 glibcxx_stylesheets=no
690 # Check for epub3 dependencies.
691 AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
692 glibcxx_epub_stylesheets=no
693 if test x"$glibcxx_local_stylesheets" = x"yes"; then
694 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
695 glibcxx_epub_stylesheets=yes
698 AC_MSG_RESULT($glibcxx_epub_stylesheets)
699 AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
705 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
709 dnl TOPLEVEL_INCLUDES
711 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
712 # Used for every C++ compile we perform.
714 -I$glibcxx_builddir/include/$host_alias \
715 -I$glibcxx_builddir/include \
716 -I$glibcxx_srcdir/libsupc++"
718 # For Canadian crosses, pick this up too.
719 if test $CANADIAN = yes; then
720 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
723 # Stuff in the actual top level. Currently only used by libsupc++ to
724 # get unwind* headers from the libgcc dir.
725 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
726 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
728 # Now, export this to all the little Makefiles....
729 AC_SUBST(GLIBCXX_INCLUDES)
730 AC_SUBST(TOPLEVEL_INCLUDES)
735 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
736 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
739 dnl OPTIMIZE_CXXFLAGS
742 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
743 # Optimization flags that are probably a good idea for thrill-seekers. Just
744 # uncomment the lines below and make, everything else is ready to go...
745 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
746 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
747 AC_SUBST(OPTIMIZE_CXXFLAGS)
749 WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2"
755 dnl All installation directory information is determined here.
759 dnl glibcxx_prefixdir
760 dnl glibcxx_toolexecdir
761 dnl glibcxx_toolexeclibdir
763 dnl Assumes cross_compiling bits already done, and with_cross_host in
766 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
767 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
768 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
769 glibcxx_toolexecdir=no
770 glibcxx_toolexeclibdir=no
771 glibcxx_prefixdir=$prefix
773 AC_MSG_CHECKING([for gxx-include-dir])
774 AC_ARG_WITH([gxx-include-dir],
775 AC_HELP_STRING([--with-gxx-include-dir=DIR],
776 [installation directory for include files]),
778 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
779 no) gxx_include_dir=no ;;
780 *) gxx_include_dir=$withval ;;
782 [gxx_include_dir=no])
783 AC_MSG_RESULT($gxx_include_dir)
785 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
786 AC_ARG_ENABLE([version-specific-runtime-libs],
787 AC_HELP_STRING([--enable-version-specific-runtime-libs],
788 [Specify that runtime libraries should be installed in a compiler-specific directory]),
789 [case "$enableval" in
790 yes) version_specific_libs=yes ;;
791 no) version_specific_libs=no ;;
792 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
794 [version_specific_libs=no])
795 AC_MSG_RESULT($version_specific_libs)
797 GCC_WITH_TOOLEXECLIBDIR
799 # Default case for install directory for include files.
800 if test $version_specific_libs = no && test $gxx_include_dir = no; then
801 gxx_include_dir='include/c++/${gcc_version}'
802 if test -n "$with_cross_host" &&
803 test x"$with_cross_host" != x"no"; then
804 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
806 gxx_include_dir='${prefix}/'"$gxx_include_dir"
810 # Version-specific runtime libs processing.
811 if test $version_specific_libs = yes; then
812 # Need the gcc compiler version to know where to install libraries
813 # and header files if --enable-version-specific-runtime-libs option
814 # is selected. FIXME: these variables are misnamed, there are
815 # no executables installed in _toolexecdir or _toolexeclibdir.
816 if test x"$gxx_include_dir" = x"no"; then
817 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
819 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
820 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
823 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
824 # Install a library built with a cross compiler in tooldir, not libdir.
825 if test x"$glibcxx_toolexecdir" = x"no"; then
826 if test -n "$with_cross_host" &&
827 test x"$with_cross_host" != x"no"; then
828 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
829 case ${with_toolexeclibdir} in
831 glibcxx_toolexeclibdir='${toolexecdir}/lib'
834 glibcxx_toolexeclibdir=${with_toolexeclibdir}
838 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
839 glibcxx_toolexeclibdir='${libdir}'
841 multi_os_directory=`$CXX -print-multi-os-directory`
842 case $multi_os_directory in
843 .) ;; # Avoid trailing /.
844 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
848 AC_MSG_CHECKING([for install location])
849 AC_MSG_RESULT($gxx_include_dir)
851 AC_SUBST(glibcxx_prefixdir)
852 AC_SUBST(gxx_include_dir)
853 AC_SUBST(glibcxx_toolexecdir)
854 AC_SUBST(glibcxx_toolexeclibdir)
860 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
861 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
862 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
864 dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
867 m4_define([GLIBCXX_ENABLE],[dnl
868 m4_define([_g_switch],[--enable-$1])dnl
869 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
870 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
875 m4_bpatsubst([$5],[permit ])) ;;
876 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
877 dnl Idea for future: generate a URL pointing to
878 dnl "onlinedocs/configopts.html#whatever"
885 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
889 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
890 m4_undefine([_g_switch])dnl
891 m4_undefine([_g_help])dnl
896 dnl Check for ISO/IEC 9899:1999 "C99" support.
898 dnl --enable-c99 defines _GLIBCXX_USE_C99
899 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
900 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
901 dnl Where DEFAULT is either `yes' or `no'.
902 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
904 AC_DEFUN([GLIBCXX_ENABLE_C99], [
905 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
907 if test x"$enable_c99" = x"yes"; then
911 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__
912 # undefined may cause fake C99 facilities, like pre-standard snprintf,
913 # to be spuriously enabled.
914 ac_save_CXXFLAGS="$CXXFLAGS"
915 CXXFLAGS="$CXXFLAGS -std=c++98"
917 ac_save_gcc_no_link="$gcc_no_link"
919 if test x$gcc_no_link != xyes; then
920 # Use -fno-exceptions to that the C driver can link these tests without
921 # hitting undefined references to personality routines.
922 CXXFLAGS="$CXXFLAGS -fno-exceptions"
923 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
924 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
929 # Check for the existence of <math.h> functions used if C99 is enabled.
930 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98])
931 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [
932 GCC_TRY_COMPILE_OR_LINK(
934 volatile double d1, d2;
942 i = isgreater(d1, d2);
943 i = isgreaterequal(d1, d2);
945 i = islessequal(d1, d2);
946 i = islessgreater(d1, d2);
947 i = islessgreater(d1, d2);
948 i = isunordered(d1, d2);
949 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no])
951 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98)
952 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then
953 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1,
954 [Define if C99 functions or macros in <math.h> should be imported
955 in <cmath> in namespace std for C++98.])
958 # Check for the existence of <complex.h> complex math functions.
959 # This is necessary even though libstdc++ uses the builtin versions
960 # of these functions, because if the builtin cannot be used, a reference
961 # to the library function is emitted.
962 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
963 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
964 if test x"$ac_has_complex_h" = x"yes"; then
965 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98])
966 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [
967 GCC_TRY_COMPILE_OR_LINK(
968 [#include <complex.h>
969 typedef __complex__ float float_type;
970 typedef __complex__ double double_type;
971 typedef __complex__ long double ld_type;
972 volatile float_type tmpf;
973 volatile double_type tmpd;
974 volatile ld_type tmpld;
977 volatile long double ld;],
989 tmpf = cpowf(tmpf, tmpf);
1002 tmpd = cpow(tmpd, tmpd);
1006 tmpld = ccosl(tmpld);
1007 tmpld = ccoshl(tmpld);
1008 tmpld = cexpl(tmpld);
1009 tmpld = clogl(tmpld);
1010 tmpld = csinl(tmpld);
1011 tmpld = csinhl(tmpld);
1012 tmpld = csqrtl(tmpld);
1013 tmpld = ctanl(tmpld);
1014 tmpld = ctanhl(tmpld);
1015 tmpld = cpowl(tmpld, tmpld);
1016 tmpld = cprojl(tmpld);
1017 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no])
1020 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98)
1021 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then
1022 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1,
1023 [Define if C99 functions in <complex.h> should be used in
1024 <complex> for C++98. Using compiler builtins for these functions
1025 requires corresponding C99 library functions to be present.])
1028 # Check for the existence in <stdio.h> of vscanf, et. al.
1029 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98])
1030 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [
1031 GCC_TRY_COMPILE_OR_LINK(
1034 void foo(char* fmt, ...)
1036 va_list args; va_start(args, fmt);
1037 vfscanf(stderr, "%i", args);
1039 vsnprintf(fmt, 0, "%i", args);
1040 vsscanf(fmt, "%i", args);
1041 snprintf(fmt, 0, "%i");
1043 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no])
1045 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98)
1046 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then
1047 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1,
1048 [Define if C99 functions or macros in <stdio.h> should be imported
1049 in <cstdio> in namespace std for C++98.])
1052 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1053 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++98])
1054 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx98, [
1055 GCC_TRY_COMPILE_OR_LINK(
1056 [#include <stdlib.h>
1058 volatile long double ld;
1059 volatile unsigned long long ll;
1062 f = strtof("gnu", &tmp);
1063 ld = strtold("gnu", &tmp);
1064 ll = strtoll("gnu", &tmp, 10);
1065 ll = strtoull("gnu", &tmp, 10);
1067 mydivt = lldiv(10,1);
1072 ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no])
1074 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx98)
1075 if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then
1076 AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1,
1077 [Define if C99 functions or macros in <stdlib.h> should be imported
1078 in <cstdlib> in namespace std for C++98.])
1081 # Check for the existence in <wchar.h> of wcstold, etc.
1082 if test x"$ac_has_wchar_h" = xyes &&
1083 test x"$ac_has_wctype_h" = xyes; then
1084 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98])
1085 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [
1086 AC_TRY_COMPILE([#include <wchar.h>
1093 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no])
1096 # Checks for wide character functions that may not be present.
1097 # Injection of these is wrapped with guard macros.
1098 # NB: only put functions here, instead of immediately above, if
1099 # absolutely necessary.
1100 AC_TRY_COMPILE([#include <wchar.h>
1101 namespace test { using ::vfwscanf; }], [],
1102 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1104 AC_TRY_COMPILE([#include <wchar.h>
1105 namespace test { using ::vswscanf; }], [],
1106 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1108 AC_TRY_COMPILE([#include <wchar.h>
1109 namespace test { using ::vwscanf; }], [],
1110 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1112 AC_TRY_COMPILE([#include <wchar.h>
1113 namespace test { using ::wcstof; }], [],
1114 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1116 AC_TRY_COMPILE([#include <wctype.h>],
1117 [wint_t t; int i = iswblank(t);],
1118 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1120 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98)
1121 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then
1122 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1,
1123 [Define if C99 functions or macros in <wchar.h> should be imported
1124 in <cwchar> in namespace std for C++98.])
1128 # Option parsed, now set things appropriately.
1129 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" ||
1130 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" ||
1131 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" ||
1132 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" ||
1133 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then
1136 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1137 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1138 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1141 gcc_no_link="$ac_save_gcc_no_link"
1142 LIBS="$ac_save_LIBS"
1143 CXXFLAGS="$ac_save_CXXFLAGS"
1149 # Use -std=c++11 and test again for C99 library feature in C++11 mode.
1150 # For the reasons given above we use -std=c++11 not -std=gnu++11.
1151 ac_save_CXXFLAGS="$CXXFLAGS"
1152 CXXFLAGS="$CXXFLAGS -std=c++11"
1153 ac_save_LIBS="$LIBS"
1154 ac_save_gcc_no_link="$gcc_no_link"
1156 if test x$gcc_no_link != xyes; then
1157 # Use -fno-exceptions to that the C driver can link these tests without
1158 # hitting undefined references to personality routines.
1159 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1160 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
1161 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
1166 # Check for the existence of <math.h> functions used if C99 is enabled.
1167 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11])
1168 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [
1169 GCC_TRY_COMPILE_OR_LINK(
1171 volatile double d1, d2;
1173 [i = fpclassify(d1);
1179 i = isgreater(d1, d2);
1180 i = isgreaterequal(d1, d2);
1182 i = islessequal(d1, d2);
1183 i = islessgreater(d1, d2);
1184 i = islessgreater(d1, d2);
1185 i = isunordered(d1, d2);
1186 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no])
1188 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11)
1189 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then
1190 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1,
1191 [Define if C99 functions or macros in <math.h> should be imported
1192 in <cmath> in namespace std for C++11.])
1195 # Check for the existence of <complex.h> complex math functions.
1196 # This is necessary even though libstdc++ uses the builtin versions
1197 # of these functions, because if the builtin cannot be used, a reference
1198 # to the library function is emitted.
1199 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
1200 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1201 if test x"$ac_has_complex_h" = x"yes"; then
1202 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11])
1203 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [
1204 GCC_TRY_COMPILE_OR_LINK(
1205 [#include <complex.h>
1206 typedef __complex__ float float_type;
1207 typedef __complex__ double double_type;
1208 typedef __complex__ long double ld_type;
1209 volatile float_type tmpf;
1210 volatile double_type tmpd;
1211 volatile ld_type tmpld;
1214 volatile long double ld;],
1218 tmpf = ccoshf(tmpf);
1222 tmpf = csinhf(tmpf);
1223 tmpf = csqrtf(tmpf);
1225 tmpf = ctanhf(tmpf);
1226 tmpf = cpowf(tmpf, tmpf);
1227 tmpf = cprojf(tmpf);
1239 tmpd = cpow(tmpd, tmpd);
1243 tmpld = ccosl(tmpld);
1244 tmpld = ccoshl(tmpld);
1245 tmpld = cexpl(tmpld);
1246 tmpld = clogl(tmpld);
1247 tmpld = csinl(tmpld);
1248 tmpld = csinhl(tmpld);
1249 tmpld = csqrtl(tmpld);
1250 tmpld = ctanl(tmpld);
1251 tmpld = ctanhl(tmpld);
1252 tmpld = cpowl(tmpld, tmpld);
1253 tmpld = cprojl(tmpld);
1254 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no])
1257 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11)
1258 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then
1259 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1,
1260 [Define if C99 functions in <complex.h> should be used in
1261 <complex> for C++11. Using compiler builtins for these functions
1262 requires corresponding C99 library functions to be present.])
1265 # Check for the existence in <stdio.h> of vscanf, et. al.
1266 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11])
1267 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [
1268 GCC_TRY_COMPILE_OR_LINK(
1271 void foo(char* fmt, ...)
1273 va_list args; va_start(args, fmt);
1274 vfscanf(stderr, "%i", args);
1276 vsnprintf(fmt, 0, "%i", args);
1277 vsscanf(fmt, "%i", args);
1278 snprintf(fmt, 0, "%i");
1280 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no])
1282 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11)
1283 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then
1284 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1,
1285 [Define if C99 functions or macros in <stdio.h> should be imported
1286 in <cstdio> in namespace std for C++11.])
1289 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1290 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11])
1291 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [
1292 GCC_TRY_COMPILE_OR_LINK(
1293 [#include <stdlib.h>
1295 volatile long double ld;
1296 volatile unsigned long long ll;
1299 f = strtof("gnu", &tmp);
1300 ld = strtold("gnu", &tmp);
1301 ll = strtoll("gnu", &tmp, 10);
1302 ll = strtoull("gnu", &tmp, 10);
1304 mydivt = lldiv(10,1);
1309 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no])
1311 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11)
1312 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then
1313 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1,
1314 [Define if C99 functions or macros in <stdlib.h> should be imported
1315 in <cstdlib> in namespace std for C++11.])
1318 # Check for the existence in <wchar.h> of wcstold, etc.
1319 if test x"$ac_has_wchar_h" = xyes &&
1320 test x"$ac_has_wctype_h" = xyes; then
1321 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11])
1322 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [
1323 AC_TRY_COMPILE([#include <wchar.h>
1330 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no])
1333 # Checks for wide character functions that may not be present.
1334 # Injection of these is wrapped with guard macros.
1335 # NB: only put functions here, instead of immediately above, if
1336 # absolutely necessary.
1337 AC_TRY_COMPILE([#include <wchar.h>
1338 namespace test { using ::vfwscanf; }], [],
1339 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1341 AC_TRY_COMPILE([#include <wchar.h>
1342 namespace test { using ::vswscanf; }], [],
1343 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1345 AC_TRY_COMPILE([#include <wchar.h>
1346 namespace test { using ::vwscanf; }], [],
1347 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1349 AC_TRY_COMPILE([#include <wchar.h>
1350 namespace test { using ::wcstof; }], [],
1351 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1353 AC_TRY_COMPILE([#include <wctype.h>],
1354 [wint_t t; int i = iswblank(t);],
1355 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1357 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11)
1358 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then
1359 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1,
1360 [Define if C99 functions or macros in <wchar.h> should be imported
1361 in <cwchar> in namespace std for C++11.])
1365 gcc_no_link="$ac_save_gcc_no_link"
1366 LIBS="$ac_save_LIBS"
1367 CXXFLAGS="$ac_save_CXXFLAGS"
1371 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1372 AC_MSG_RESULT($enable_c99)
1377 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1378 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1379 dnl in the C++11 standard.
1381 dnl --enable-libstdcxx-time
1382 dnl --enable-libstdcxx-time=yes
1383 dnl checks for the availability of monotonic and realtime clocks,
1384 dnl nanosleep and sched_yield in libc.
1385 dnl --enable-libstdcxx-time=rt
1386 dnl also searches (and, if needed, links) librt. Note that this is
1387 dnl not always desirable because, in glibc 2.16 and earlier, for
1388 dnl example, in turn it triggers the linking of libpthread too,
1389 dnl which activates locking,
1390 dnl a large overhead for single-thread programs.
1391 dnl --enable-libstdcxx-time=no
1392 dnl --disable-libstdcxx-time
1393 dnl disables the checks completely
1395 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1396 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1397 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1398 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1400 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1402 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
1403 [use KIND for check type],
1408 ac_save_CXXFLAGS="$CXXFLAGS"
1409 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1410 ac_save_LIBS="$LIBS"
1412 ac_has_clock_monotonic=no
1413 ac_has_clock_realtime=no
1415 ac_has_sched_yield=no
1417 if test x"$enable_libstdcxx_time" = x"auto"; then
1419 case "${target_os}" in
1421 ac_has_nanosleep=yes
1424 ac_has_nanosleep=yes
1425 ac_has_sched_yield=yes
1427 # VxWorks has nanosleep as soon as the kernel is configured with
1428 # INCLUDE_POSIX_TIMERS, which is normally/most-often the case.
1430 ac_has_nanosleep=yes
1432 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1433 # Don't use link test for freestanding library, in case gcc_no_link=yes
1434 if test x"$is_hosted" = xyes; then
1435 # Versions of glibc before 2.17 needed -lrt for clock_gettime.
1436 AC_SEARCH_LIBS(clock_gettime, [rt])
1437 if test x"$ac_cv_search_clock_gettime" = x"none required"; then
1438 ac_has_clock_monotonic=yes
1439 ac_has_clock_realtime=yes
1442 ac_has_nanosleep=yes
1443 ac_has_sched_yield=yes
1445 freebsd*|netbsd*|dragonfly*|rtems*)
1446 ac_has_clock_monotonic=yes
1447 ac_has_clock_realtime=yes
1448 ac_has_nanosleep=yes
1449 ac_has_sched_yield=yes
1452 ac_has_clock_monotonic=yes
1453 ac_has_clock_realtime=yes
1454 ac_has_nanosleep=yes
1457 ac_has_clock_monotonic=yes
1458 ac_has_clock_realtime=yes
1459 ac_has_nanosleep=yes
1460 ac_has_sched_yield=yes
1463 ac_has_nanosleep=yes
1464 ac_has_sched_yield=yes
1467 elif test x"$enable_libstdcxx_time" != x"no"; then
1469 if test x"$enable_libstdcxx_time" = x"rt"; then
1470 AC_SEARCH_LIBS(clock_gettime, [rt])
1471 AC_SEARCH_LIBS(nanosleep, [rt])
1473 AC_CHECK_FUNC(clock_gettime)
1474 AC_CHECK_FUNC(nanosleep)
1477 case "$ac_cv_search_clock_gettime" in
1478 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1481 case "$ac_cv_search_nanosleep" in
1482 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1486 AC_SEARCH_LIBS(sched_yield, [rt])
1488 case "$ac_cv_search_sched_yield" in
1490 if test x"$enable_libstdcxx_time" = x"rt"; then
1491 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1492 ac_has_sched_yield=yes
1496 ac_has_sched_yield=yes
1500 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1502 if test x"$ac_has_unistd_h" = x"yes"; then
1503 AC_MSG_CHECKING([for monotonic clock])
1505 [#include <unistd.h>
1508 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1511 clock_gettime(CLOCK_MONOTONIC, &tp);
1512 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1514 AC_MSG_RESULT($ac_has_clock_monotonic)
1516 AC_MSG_CHECKING([for realtime clock])
1518 [#include <unistd.h>
1521 [#if _POSIX_TIMERS > 0
1524 clock_gettime(CLOCK_REALTIME, &tp);
1525 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1527 AC_MSG_RESULT($ac_has_clock_realtime)
1529 AC_MSG_CHECKING([for nanosleep])
1531 [#include <unistd.h>
1534 [#if _POSIX_TIMERS > 0
1538 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1540 AC_MSG_RESULT($ac_has_nanosleep)
1544 if test x"$ac_has_clock_monotonic" != x"yes"; then
1545 case ${target_os} in
1547 AC_MSG_CHECKING([for clock_gettime syscall])
1549 [#include <unistd.h>
1551 #include <sys/syscall.h>
1553 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1556 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1557 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1558 ], [ac_has_clock_gettime_syscall=yes], [ac_has_clock_gettime_syscall=no])
1559 AC_MSG_RESULT($ac_has_clock_gettime_syscall)
1560 if test x"$ac_has_clock_gettime_syscall" = x"yes"; then
1561 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1562 [Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1563 ac_has_clock_monotonic=yes
1564 ac_has_clock_realtime=yes
1565 AC_MSG_CHECKING([for struct timespec that matches syscall])
1568 #include <sys/syscall.h>
1570 [#ifdef SYS_clock_gettime64
1571 #if SYS_clock_gettime64 != SYS_clock_gettime
1572 // We need to use SYS_clock_gettime and libc appears to
1573 // also know about the SYS_clock_gettime64 syscall.
1574 // Check that userspace doesn't use time64 version of timespec.
1575 static_assert(sizeof(timespec::tv_sec) == sizeof(long),
1576 "struct timespec must be compatible with SYS_clock_gettime");
1580 [ac_timespec_matches_syscall=yes],
1581 [ac_timespec_matches_syscall=no])
1582 AC_MSG_RESULT($ac_timespec_matches_syscall)
1583 if test x"$ac_timespec_matches_syscall" = no; then
1584 AC_MSG_ERROR([struct timespec is not compatible with SYS_clock_gettime, please report a bug to http://gcc.gnu.org/bugzilla])
1590 if test x"$ac_has_clock_monotonic" = x"yes"; then
1591 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1592 [ Defined if clock_gettime has monotonic clock support. ])
1595 if test x"$ac_has_clock_realtime" = x"yes"; then
1596 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1597 [ Defined if clock_gettime has realtime clock support. ])
1600 if test x"$ac_has_sched_yield" = x"yes"; then
1601 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1602 [ Defined if sched_yield is available. ])
1605 if test x"$ac_has_nanosleep" = x"yes"; then
1606 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1607 [ Defined if nanosleep is available. ])
1609 AC_MSG_CHECKING([for sleep])
1610 AC_TRY_COMPILE([#include <unistd.h>],
1612 [ac_has_sleep=yes],[ac_has_sleep=no])
1613 if test x"$ac_has_sleep" = x"yes"; then
1614 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1616 AC_MSG_RESULT($ac_has_sleep)
1617 AC_MSG_CHECKING([for usleep])
1618 AC_TRY_COMPILE([#include <unistd.h>],
1621 [ac_has_usleep=yes],[ac_has_usleep=no])
1622 if test x"$ac_has_usleep" = x"yes"; then
1623 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1625 AC_MSG_RESULT($ac_has_usleep)
1628 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1630 AC_MSG_CHECKING([for Sleep])
1631 AC_TRY_COMPILE([#include <windows.h>],
1633 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1634 if test x"$ac_has_win32_sleep" = x"yes"; then
1635 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1638 AC_MSG_RESULT($ac_has_win32_sleep)
1641 if test x"$ac_no_sleep" = x"yes"; then
1642 AC_DEFINE(NO_SLEEP,1, [Defined if no way to sleep is available.])
1645 AC_SUBST(GLIBCXX_LIBS)
1647 CXXFLAGS="$ac_save_CXXFLAGS"
1648 LIBS="$ac_save_LIBS"
1653 dnl Check for gettimeofday, used in the implementation of 20.11.7
1654 dnl [time.clock] in the C++11 standard.
1656 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1658 AC_MSG_CHECKING([for gettimeofday])
1662 ac_save_CXXFLAGS="$CXXFLAGS"
1663 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1665 ac_has_gettimeofday=no;
1666 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1667 if test x"$ac_has_sys_time_h" = x"yes"; then
1668 AC_MSG_CHECKING([for gettimeofday])
1669 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1670 [timeval tv; gettimeofday(&tv, 0);],
1671 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1673 AC_MSG_RESULT($ac_has_gettimeofday)
1676 if test x"$ac_has_gettimeofday" = x"yes"; then
1677 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1678 [ Defined if gettimeofday is available. ])
1681 CXXFLAGS="$ac_save_CXXFLAGS"
1686 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1687 dnl facilities in Chapter 8, "C compatibility".
1689 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1694 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1695 # undefined and fake C99 facilities may be spuriously enabled.
1696 ac_save_CXXFLAGS="$CXXFLAGS"
1697 CXXFLAGS="$CXXFLAGS -std=c++98"
1699 # Check for the existence of <complex.h> complex math functions used
1701 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1702 ac_c99_complex_tr1=no;
1703 if test x"$ac_has_complex_h" = x"yes"; then
1704 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1705 AC_TRY_COMPILE([#include <complex.h>],
1706 [typedef __complex__ float float_type; float_type tmpf;
1713 typedef __complex__ double double_type; double_type tmpd;
1720 typedef __complex__ long double ld_type; ld_type tmpld;
1727 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1729 AC_MSG_RESULT($ac_c99_complex_tr1)
1730 if test x"$ac_c99_complex_tr1" = x"yes"; then
1731 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1732 [Define if C99 functions in <complex.h> should be used in
1733 <tr1/complex>. Using compiler builtins for these functions
1734 requires corresponding C99 library functions to be present.])
1737 # Check for the existence of <ctype.h> functions.
1738 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1739 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1740 AC_TRY_COMPILE([#include <ctype.h>],
1744 ],[glibcxx_cv_c99_ctype_tr1=yes],
1745 [glibcxx_cv_c99_ctype_tr1=no])
1747 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1748 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1749 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1750 [Define if C99 functions in <ctype.h> should be imported in
1751 <tr1/cctype> in namespace std::tr1.])
1754 # Check for the existence of <fenv.h> functions.
1755 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1757 if test x"$ac_has_fenv_h" = x"yes"; then
1758 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1759 AC_TRY_COMPILE([#include <fenv.h>],
1764 ret = feclearexcept(except);
1765 ret = fegetexceptflag(pflag, except);
1766 ret = feraiseexcept(except);
1767 ret = fesetexceptflag(pflag, except);
1768 ret = fetestexcept(except);
1770 ret = fesetround(mode);
1771 ret = fegetenv(penv);
1772 ret = feholdexcept(penv);
1773 ret = fesetenv(penv);
1774 ret = feupdateenv(penv);
1775 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1777 AC_MSG_RESULT($ac_c99_fenv_tr1)
1778 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1779 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1780 [Define if C99 functions in <fenv.h> should be imported in
1781 <tr1/cfenv> in namespace std::tr1.])
1784 # Check for the existence of <stdint.h> types.
1785 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1786 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1787 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1788 #define __STDC_CONSTANT_MACROS
1789 #include <stdint.h>],
1790 [typedef int8_t my_int8_t;
1791 my_int8_t i8 = INT8_MIN;
1793 typedef int16_t my_int16_t;
1794 my_int16_t i16 = INT16_MIN;
1796 typedef int32_t my_int32_t;
1797 my_int32_t i32 = INT32_MIN;
1799 typedef int64_t my_int64_t;
1800 my_int64_t i64 = INT64_MIN;
1802 typedef int_fast8_t my_int_fast8_t;
1803 my_int_fast8_t if8 = INT_FAST8_MIN;
1804 if8 = INT_FAST8_MAX;
1805 typedef int_fast16_t my_int_fast16_t;
1806 my_int_fast16_t if16 = INT_FAST16_MIN;
1807 if16 = INT_FAST16_MAX;
1808 typedef int_fast32_t my_int_fast32_t;
1809 my_int_fast32_t if32 = INT_FAST32_MIN;
1810 if32 = INT_FAST32_MAX;
1811 typedef int_fast64_t my_int_fast64_t;
1812 my_int_fast64_t if64 = INT_FAST64_MIN;
1813 if64 = INT_FAST64_MAX;
1814 typedef int_least8_t my_int_least8_t;
1815 my_int_least8_t il8 = INT_LEAST8_MIN;
1816 il8 = INT_LEAST8_MAX;
1817 typedef int_least16_t my_int_least16_t;
1818 my_int_least16_t il16 = INT_LEAST16_MIN;
1819 il16 = INT_LEAST16_MAX;
1820 typedef int_least32_t my_int_least32_t;
1821 my_int_least32_t il32 = INT_LEAST32_MIN;
1822 il32 = INT_LEAST32_MAX;
1823 typedef int_least64_t my_int_least64_t;
1824 my_int_least64_t il64 = INT_LEAST64_MIN;
1825 il64 = INT_LEAST64_MAX;
1826 typedef intmax_t my_intmax_t;
1827 my_intmax_t im = INTMAX_MAX;
1829 typedef intptr_t my_intptr_t;
1830 my_intptr_t ip = INTPTR_MAX;
1832 typedef uint8_t my_uint8_t;
1833 my_uint8_t ui8 = UINT8_MAX;
1835 typedef uint16_t my_uint16_t;
1836 my_uint16_t ui16 = UINT16_MAX;
1838 typedef uint32_t my_uint32_t;
1839 my_uint32_t ui32 = UINT32_MAX;
1841 typedef uint64_t my_uint64_t;
1842 my_uint64_t ui64 = UINT64_MAX;
1844 typedef uint_fast8_t my_uint_fast8_t;
1845 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1846 uif8 = UINT_FAST8_MAX;
1847 typedef uint_fast16_t my_uint_fast16_t;
1848 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1849 uif16 = UINT_FAST16_MAX;
1850 typedef uint_fast32_t my_uint_fast32_t;
1851 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1852 uif32 = UINT_FAST32_MAX;
1853 typedef uint_fast64_t my_uint_fast64_t;
1854 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1855 uif64 = UINT_FAST64_MAX;
1856 typedef uint_least8_t my_uint_least8_t;
1857 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1858 uil8 = UINT_LEAST8_MAX;
1859 typedef uint_least16_t my_uint_least16_t;
1860 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1861 uil16 = UINT_LEAST16_MAX;
1862 typedef uint_least32_t my_uint_least32_t;
1863 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1864 uil32 = UINT_LEAST32_MAX;
1865 typedef uint_least64_t my_uint_least64_t;
1866 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1867 uil64 = UINT_LEAST64_MAX;
1868 typedef uintmax_t my_uintmax_t;
1869 my_uintmax_t uim = UINTMAX_MAX;
1871 typedef uintptr_t my_uintptr_t;
1872 my_uintptr_t uip = UINTPTR_MAX;
1874 ],[glibcxx_cv_c99_stdint_tr1=yes],
1875 [glibcxx_cv_c99_stdint_tr1=no])
1877 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1878 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1879 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1880 [Define if C99 types in <stdint.h> should be imported in
1881 <tr1/cstdint> in namespace std::tr1.])
1884 # Check for the existence of <math.h> functions.
1885 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1886 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1887 AC_TRY_COMPILE([#include <math.h>],
1888 [typedef double_t my_double_t;
1889 typedef float_t my_float_t;
1903 copysignf(0.0f, 0.0f);
1904 copysignl(0.0l, 0.0l);
1921 fmaf(0.0f, 0.0f, 0.0f);
1922 fmal(0.0l, 0.0l, 0.0l);
1938 #ifndef __APPLE__ /* see below */
1967 nextafter(0.0, 0.0);
1968 nextafterf(0.0f, 0.0f);
1969 nextafterl(0.0l, 0.0l);
1970 nexttoward(0.0, 0.0);
1971 nexttowardf(0.0f, 0.0f);
1972 nexttowardl(0.0l, 0.0l);
1973 remainder(0.0, 0.0);
1974 remainderf(0.0f, 0.0f);
1975 remainderl(0.0l, 0.0l);
1976 remquo(0.0, 0.0, 0);
1977 remquof(0.0f, 0.0f, 0);
1978 remquol(0.0l, 0.0l, 0);
1997 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1999 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
2000 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
2001 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
2002 [Define if C99 functions or macros in <math.h> should be imported
2003 in <tr1/cmath> in namespace std::tr1.])
2005 case "${target_os}" in
2007 AC_MSG_CHECKING([for ISO C99 rounding functions in <math.h>])
2008 AC_CACHE_VAL(glibcxx_cv_c99_math_llround, [
2009 AC_TRY_COMPILE([#include <math.h>],
2017 [glibcxx_cv_c99_math_llround=yes],
2018 [glibcxx_cv_c99_math_llround=no])
2020 AC_MSG_RESULT($glibcxx_cv_c99_math_llround)
2023 if test x"$glibcxx_cv_c99_math_llround" = x"no"; then
2024 AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1,
2025 [Define if C99 llrint and llround functions are missing from <math.h>.])
2029 # Check for the existence of <inttypes.h> functions (NB: doesn't make
2030 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
2031 ac_c99_inttypes_tr1=no;
2032 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2033 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
2034 AC_TRY_COMPILE([#include <inttypes.h>],
2035 [intmax_t i, numer, denom, base;
2038 intmax_t ret = imaxabs(i);
2039 imaxdiv_t dret = imaxdiv(numer, denom);
2040 ret = strtoimax(s, endptr, base);
2041 uintmax_t uret = strtoumax(s, endptr, base);
2042 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
2044 AC_MSG_RESULT($ac_c99_inttypes_tr1)
2045 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
2046 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
2047 [Define if C99 functions in <inttypes.h> should be imported in
2048 <tr1/cinttypes> in namespace std::tr1.])
2051 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
2052 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
2053 ac_c99_inttypes_wchar_t_tr1=no;
2054 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2055 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
2056 AC_TRY_COMPILE([#include <inttypes.h>],
2060 intmax_t ret = wcstoimax(s, endptr, base);
2061 uintmax_t uret = wcstoumax(s, endptr, base);
2062 ],[ac_c99_inttypes_wchar_t_tr1=yes],
2063 [ac_c99_inttypes_wchar_t_tr1=no])
2065 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
2066 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
2067 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
2068 [Define if wchar_t C99 functions in <inttypes.h> should be
2069 imported in <tr1/cinttypes> in namespace std::tr1.])
2072 # Check for the existence of the <stdbool.h> header.
2073 AC_CHECK_HEADERS(stdbool.h)
2075 # Check for the existence of the <stdalign.h> header.
2076 AC_CHECK_HEADERS(stdalign.h)
2078 CXXFLAGS="$ac_save_CXXFLAGS"
2083 dnl Check for uchar.h and usability.
2085 AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2088 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2092 ac_save_CXXFLAGS="$CXXFLAGS"
2093 CXXFLAGS="$CXXFLAGS -std=c++11"
2095 if test x"$ac_has_uchar_h" = x"yes"; then
2096 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2097 AC_TRY_COMPILE([#include <uchar.h>
2098 #ifdef __STDC_UTF_16__
2099 long i = __STDC_UTF_16__;
2101 #ifdef __STDC_UTF_32__
2102 long j = __STDC_UTF_32__;
2112 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2114 ac_c11_uchar_cxx11=no
2116 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2117 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2118 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2119 [Define if C11 functions in <uchar.h> should be imported into
2120 namespace std in <cuchar>.])
2123 CXXFLAGS="$ac_save_CXXFLAGS"
2129 dnl Check whether "/dev/random" and "/dev/urandom" are available for
2130 dnl class std::random_device from C++ 2011 [rand.device], and
2131 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2133 AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [
2135 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for std::random_device])
2136 AC_CACHE_VAL(glibcxx_cv_dev_random, [
2137 if test -r /dev/random && test -r /dev/urandom; then
2138 ## For MSys environment the test above is detected as false-positive
2139 ## on mingw-targets. So disable it explicitly for them.
2140 case ${target_os} in
2141 *mingw*) glibcxx_cv_dev_random=no ;;
2142 *) glibcxx_cv_dev_random=yes ;;
2145 glibcxx_cv_dev_random=no;
2148 AC_MSG_RESULT($glibcxx_cv_dev_random)
2150 if test x"$glibcxx_cv_dev_random" = x"yes"; then
2151 AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1,
2152 [Define if /dev/random and /dev/urandom are available for
2153 std::random_device.])
2154 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
2155 [Define if /dev/random and /dev/urandom are available for
2156 the random_device of TR1 (Chapter 5.1).])
2162 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2164 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2166 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
2167 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
2168 [#include <stdio.h>],
2169 [AC_MSG_ERROR([computing EOF failed])])
2171 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
2172 [Define to the value of the EOF integer constant.])
2174 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
2175 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
2176 [#include <stdio.h>],
2177 [AC_MSG_ERROR([computing SEEK_CUR failed])])
2179 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
2180 [Define to the value of the SEEK_CUR integer constant.])
2182 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
2183 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
2184 [#include <stdio.h>],
2185 [AC_MSG_ERROR([computing SEEK_END failed])])
2187 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
2188 [Define to the value of the SEEK_END integer constant.])
2192 dnl Check whether required C++ overloads are present in <stdio.h>.
2194 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2198 # Use C++11 because a conforming <stdio.h> won't define gets for C++14,
2199 # and we don't need a declaration for C++14 anyway.
2200 ac_save_CXXFLAGS="$CXXFLAGS"
2201 CXXFLAGS="$CXXFLAGS -std=gnu++11"
2203 AC_MSG_CHECKING([for gets declaration])
2204 AC_CACHE_VAL(glibcxx_cv_gets, [
2205 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2212 [glibcxx_cv_gets=yes],
2213 [glibcxx_cv_gets=no]
2216 if test $glibcxx_cv_gets = yes; then
2217 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.])
2219 AC_MSG_RESULT($glibcxx_cv_gets)
2221 CXXFLAGS="$ac_save_CXXFLAGS"
2226 dnl Check whether required C++11 overloads for floating point and integral
2227 dnl types are present in <math.h>.
2229 AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2233 ac_save_CXXFLAGS="$CXXFLAGS"
2234 CXXFLAGS="$CXXFLAGS -std=c++11"
2238 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch
2239 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads.
2240 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads])
2241 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [
2242 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2246 inline bool isfinite(float __x)
2247 { return __builtin_isfinite(__x); }
2250 [glibcxx_cv_math11_fp_overload=no],
2251 [glibcxx_cv_math11_fp_overload=yes]
2254 # autoheader cannot handle indented templates.
2255 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP],
2256 [/* Define if all C++11 floating point overloads are available in <math.h>. */
2257 #if __cplusplus >= 201103L
2258 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
2261 if test $glibcxx_cv_math11_fp_overload = yes; then
2262 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP)
2264 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload])
2266 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch
2267 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads.
2268 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads])
2269 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [
2270 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2273 template<typename _Tp>
2274 struct __is_integer;
2276 struct __is_integer<int>
2278 enum { __value = 1 };
2281 namespace __gnu_cxx {
2282 template<bool, typename>
2284 template<typename _Tp>
2285 struct __enable_if<true, _Tp>
2286 { typedef _Tp __type; };
2289 template<typename _Tp>
2290 constexpr typename __gnu_cxx::__enable_if
2291 <__is_integer<_Tp>::__value, double>::__type
2293 { return __builtin_log2(__x); }
2299 return std::log2(i);
2302 [glibcxx_cv_math11_int_overload=no],
2303 [glibcxx_cv_math11_int_overload=yes]
2306 # autoheader cannot handle indented templates.
2307 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT],
2308 [/* Define if all C++11 integral type overloads are available in <math.h>. */
2309 #if __cplusplus >= 201103L
2310 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT
2313 if test $glibcxx_cv_math11_int_overload = yes; then
2314 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT)
2316 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload])
2319 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2320 # functions (instead of or as well as the C99 generic macros) then we
2321 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2322 # and must use the ones from <math.h> instead.
2323 AC_MSG_CHECKING([for obsolete isinf function in <math.h>])
2324 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [
2325 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2326 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2332 bool isinf(long double);
2335 bool b = isinf(0.0);
2337 [glibcxx_cv_obsolete_isinf=yes],
2338 [glibcxx_cv_obsolete_isinf=no]
2340 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf])
2341 if test $glibcxx_cv_obsolete_isinf = yes; then
2342 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
2343 [Define if <math.h> defines obsolete isinf function.])
2346 AC_MSG_CHECKING([for obsolete isnan function in <math.h>])
2347 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [
2348 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2349 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2355 bool isnan(long double);
2358 bool b = isnan(0.0);
2360 [glibcxx_cv_obsolete_isnan=yes],
2361 [glibcxx_cv_obsolete_isnan=no]
2363 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan])
2364 if test $glibcxx_cv_obsolete_isnan = yes; then
2365 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
2366 [Define if <math.h> defines obsolete isnan function.])
2371 CXXFLAGS="$ac_save_CXXFLAGS"
2376 dnl Check for what type of C headers to use.
2378 dnl --enable-cheaders= [does stuff].
2379 dnl --disable-cheaders [does not do anything, really].
2380 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2381 dnl Where DEFAULT is either 'c' or 'c_global' or 'c_std'.
2383 dnl To use the obsolete 'c_std' headers use --enable-cheaders-obsolete as
2384 dnl well as --enable-cheaders=c_std, otherwise configure will fail.
2386 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2387 GLIBCXX_ENABLE(cheaders-obsolete,no,,
2388 [allow use of obsolete "C" headers for g++])
2389 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2390 [construct "C" headers for g++], [permit c|c_global|c_std])
2391 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2392 if test $enable_cheaders = c_std ; then
2393 AC_MSG_WARN([the --enable-cheaders=c_std configuration is obsolete, c_global should be used instead])
2394 AC_MSG_WARN([if you are unable to use c_global please report a bug or inform libstdc++@gcc.gnu.org])
2395 if test $enable_cheaders_obsolete != yes ; then
2396 AC_MSG_ERROR(use --enable-cheaders-obsolete to use c_std "C" headers)
2400 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2402 # Allow overrides to configure.host here.
2403 if test $enable_cheaders = c_global; then
2407 AC_SUBST(C_INCLUDE_DIR)
2408 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2409 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2410 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2411 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2416 dnl Check for which locale library to use. The choice is mapped to
2417 dnl a subdirectory of config/locale.
2419 dnl Default is generic.
2421 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2422 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2423 [use MODEL for target locale package],
2424 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2426 # Deal with gettext issues. Default to not using it (=no) until we detect
2427 # support for it later. Let the user turn it off via --e/d, but let that
2428 # default to on for easier handling.
2431 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2435 # Either a known package, or "auto"
2436 if test $enable_clocale = no || test $enable_clocale = yes; then
2439 enable_clocale_flag=$enable_clocale
2441 # Probe for locale model to use if none specified.
2442 # Default to "generic".
2443 if test $enable_clocale_flag = auto; then
2444 case ${target_os} in
2445 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2446 enable_clocale_flag=gnu
2449 enable_clocale_flag=darwin
2451 dragonfly* | freebsd*)
2452 enable_clocale_flag=dragonfly
2455 enable_clocale_flag=newlib
2458 if test x"$with_newlib" = x"yes"; then
2459 enable_clocale_flag=newlib
2461 enable_clocale_flag=generic
2467 # Sanity check model, and test for special functionality.
2468 if test $enable_clocale_flag = gnu; then
2469 AC_EGREP_CPP([_GLIBCXX_ok], [
2470 #include <features.h>
2471 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2474 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2476 # Set it to scream when it hurts.
2477 ac_save_CFLAGS="$CFLAGS"
2478 CFLAGS="-Wimplicit-function-declaration -Werror"
2480 # Use strxfrm_l if available.
2481 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2483 #include <locale.h>],
2484 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2485 AC_DEFINE(HAVE_STRXFRM_L, 1,
2486 [Define if strxfrm_l is available in <string.h>.]),)
2488 # Use strerror_l if available.
2489 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2491 #include <locale.h>],
2492 [__locale_t loc; strerror_l(5, loc);],
2493 AC_DEFINE(HAVE_STRERROR_L, 1,
2494 [Define if strerror_l is available in <string.h>.]),)
2496 CFLAGS="$ac_save_CFLAGS"
2499 # Perhaps use strerror_r if available, and strerror_l isn't.
2500 ac_save_CFLAGS="$CFLAGS"
2501 CFLAGS="-Wimplicit-function-declaration -Werror"
2502 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2504 #include <locale.h>],
2505 [char s[128]; strerror_r(5, s, 128);],
2506 AC_DEFINE(HAVE_STRERROR_R, 1,
2507 [Define if strerror_r is available in <string.h>.]),)
2508 CFLAGS="$ac_save_CFLAGS"
2510 # Set configure bits for specified locale package
2511 AC_MSG_CHECKING([for C locale to use])
2512 case ${enable_clocale_flag} in
2514 AC_MSG_RESULT(generic)
2516 CLOCALE_H=config/locale/generic/c_locale.h
2517 CLOCALE_CC=config/locale/generic/c_locale.cc
2518 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2519 CCOLLATE_CC=config/locale/generic/collate_members.cc
2520 CCTYPE_CC=config/locale/generic/ctype_members.cc
2521 CMESSAGES_H=config/locale/generic/messages_members.h
2522 CMESSAGES_CC=config/locale/generic/messages_members.cc
2523 CMONEY_CC=config/locale/generic/monetary_members.cc
2524 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2525 CTIME_H=config/locale/generic/time_members.h
2526 CTIME_CC=config/locale/generic/time_members.cc
2527 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2530 AC_MSG_RESULT(darwin)
2532 CLOCALE_H=config/locale/generic/c_locale.h
2533 CLOCALE_CC=config/locale/generic/c_locale.cc
2534 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2535 CCOLLATE_CC=config/locale/generic/collate_members.cc
2536 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2537 CMESSAGES_H=config/locale/generic/messages_members.h
2538 CMESSAGES_CC=config/locale/generic/messages_members.cc
2539 CMONEY_CC=config/locale/generic/monetary_members.cc
2540 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2541 CTIME_H=config/locale/generic/time_members.h
2542 CTIME_CC=config/locale/generic/time_members.cc
2543 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2547 AC_MSG_RESULT(dragonfly or freebsd)
2549 CLOCALE_H=config/locale/dragonfly/c_locale.h
2550 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2551 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2552 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2553 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2554 CMESSAGES_H=config/locale/generic/messages_members.h
2555 CMESSAGES_CC=config/locale/generic/messages_members.cc
2556 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2557 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2558 CTIME_H=config/locale/dragonfly/time_members.h
2559 CTIME_CC=config/locale/dragonfly/time_members.cc
2560 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2566 # Declare intention to use gettext, and add support for specific
2568 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2571 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2572 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2573 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2576 # Export the build objects.
2577 for ling in $ALL_LINGUAS; do \
2578 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2579 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2581 AC_SUBST(glibcxx_MOFILES)
2582 AC_SUBST(glibcxx_POFILES)
2584 CLOCALE_H=config/locale/gnu/c_locale.h
2585 CLOCALE_CC=config/locale/gnu/c_locale.cc
2586 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2587 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2588 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2589 CMESSAGES_H=config/locale/gnu/messages_members.h
2590 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2591 CMONEY_CC=config/locale/gnu/monetary_members.cc
2592 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2593 CTIME_H=config/locale/gnu/time_members.h
2594 CTIME_CC=config/locale/gnu/time_members.cc
2595 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2598 AC_MSG_RESULT(IEEE 1003.1)
2600 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2601 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2602 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2603 CCOLLATE_CC=config/locale/generic/collate_members.cc
2604 CCTYPE_CC=config/locale/generic/ctype_members.cc
2605 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2606 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2607 CMONEY_CC=config/locale/generic/monetary_members.cc
2608 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2609 CTIME_H=config/locale/generic/time_members.h
2610 CTIME_CC=config/locale/generic/time_members.cc
2611 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2614 AC_MSG_RESULT(newlib)
2616 CLOCALE_H=config/locale/generic/c_locale.h
2617 CLOCALE_CC=config/locale/generic/c_locale.cc
2618 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2619 CCOLLATE_CC=config/locale/generic/collate_members.cc
2620 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2621 CMESSAGES_H=config/locale/generic/messages_members.h
2622 CMESSAGES_CC=config/locale/generic/messages_members.cc
2623 CMONEY_CC=config/locale/generic/monetary_members.cc
2624 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2625 CTIME_H=config/locale/generic/time_members.h
2626 CTIME_CC=config/locale/generic/time_members.cc
2627 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2631 # This is where the testsuite looks for locale catalogs, using the
2632 # -DLOCALEDIR define during testsuite compilation.
2633 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2634 AC_SUBST(glibcxx_localedir)
2636 # A standalone libintl (e.g., GNU libintl) may be in use.
2637 if test $USE_NLS = yes; then
2638 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2639 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2641 if test $USE_NLS = yes; then
2642 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2643 [Define if NLS translations are to be used.])
2648 AC_SUBST(CMESSAGES_H)
2649 AC_SUBST(CCODECVT_CC)
2650 AC_SUBST(CCOLLATE_CC)
2652 AC_SUBST(CMESSAGES_CC)
2654 AC_SUBST(CNUMERIC_CC)
2657 AC_SUBST(CLOCALE_CC)
2658 AC_SUBST(CLOCALE_INTERNAL_H)
2663 dnl Check for which std::allocator base class to use. The choice is
2664 dnl mapped from a subdirectory of include/ext.
2668 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2669 AC_MSG_CHECKING([for std::allocator base class])
2670 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2671 [use KIND for target std::allocator base],
2672 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2674 # If they didn't use this option switch, or if they specified --enable
2675 # with no specific model, we'll have to look for one. If they
2676 # specified --disable (???), do likewise.
2677 if test $enable_libstdcxx_allocator = no ||
2678 test $enable_libstdcxx_allocator = yes;
2680 enable_libstdcxx_allocator=auto
2683 # Either a known package, or "auto". Auto implies the default choice
2684 # for a particular platform.
2685 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2687 # Probe for host-specific support if no specific model is specified.
2689 if test $enable_libstdcxx_allocator_flag = auto; then
2690 case ${target_os} in
2691 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2692 enable_libstdcxx_allocator_flag=new
2695 enable_libstdcxx_allocator_flag=new
2699 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2702 # Set configure bits for specified locale package
2703 case ${enable_libstdcxx_allocator_flag} in
2705 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2706 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2709 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2710 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2713 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2714 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2717 ALLOCATOR_H=config/allocator/new_allocator_base.h
2718 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2721 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2722 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2726 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2727 test $enable_libstdcxx_allocator_flag = new)
2728 AC_SUBST(ALLOCATOR_H)
2729 AC_SUBST(ALLOCATOR_NAME)
2734 dnl Check for whether the Boost-derived checks should be turned on.
2736 dnl --enable-concept-checks turns them on.
2737 dnl --disable-concept-checks leaves them off.
2738 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2739 dnl Where DEFAULT is either `yes' or `no'.
2741 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2742 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2743 if test $enable_concept_checks = yes; then
2744 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2745 [Define to use concept checking code from the boost libraries.])
2750 dnl Use extern templates.
2752 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2753 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2755 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2756 dnl Where DEFAULT is `yes' or `no'.
2758 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2760 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2762 AC_MSG_CHECKING([for extern template support])
2763 AC_MSG_RESULT([$enable_extern_template])
2765 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2769 dnl Use vtable verification.
2771 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2772 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2774 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2775 dnl Where DEFAULT is `yes' or `no'.
2777 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2779 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2781 AC_MSG_CHECKING([for vtable verify support])
2782 AC_MSG_RESULT([$enable_vtable_verify])
2785 if test $enable_vtable_verify = yes; then
2786 case ${target_os} in
2788 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2789 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2793 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2794 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2797 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2798 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2801 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2802 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2805 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2812 AC_SUBST(VTV_CXXFLAGS)
2813 AC_SUBST(VTV_PCH_CXXFLAGS)
2814 AC_SUBST(VTV_CXXLINKFLAGS)
2815 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2816 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2820 dnl Check for parallel mode pre-requisites, including OpenMP support.
2822 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2824 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2828 # See if configured libgomp/omp.h exists. (libgomp may be in
2829 # noconfigdirs but not explicitly disabled.)
2830 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2831 enable_parallel=yes;
2833 AC_MSG_NOTICE([target-libgomp not built])
2836 AC_MSG_CHECKING([for parallel mode support])
2837 AC_MSG_RESULT([$enable_parallel])
2842 dnl Check for which I/O library to use: stdio and POSIX, or pure stdio.
2844 dnl Default is stdio_posix.
2846 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2847 AC_MSG_CHECKING([for underlying I/O to use])
2848 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2849 [use target-specific I/O package], [permit stdio|stdio_posix|stdio_pure])
2851 # The only available I/O model is based on stdio, via basic_file_stdio.
2852 # The default "stdio" is actually "stdio + POSIX" because it uses fdopen(3)
2853 # to get a file descriptor and then uses read(3) and write(3) with it.
2854 # The "stdio_pure" model doesn't use fdopen and only uses FILE* for I/O.
2855 case ${enable_cstdio} in
2857 CSTDIO_H=config/io/c_io_stdio.h
2858 BASIC_FILE_H=config/io/basic_file_stdio.h
2859 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2860 AC_MSG_RESULT(stdio)
2862 if test "x$enable_cstdio" = "xstdio_pure" ; then
2863 AC_DEFINE(_GLIBCXX_USE_STDIO_PURE, 1,
2864 [Define to restrict std::__basic_file<> to stdio APIs.])
2870 AC_SUBST(BASIC_FILE_H)
2871 AC_SUBST(BASIC_FILE_CC)
2876 dnl Check for "unusual" flags to pass to the compiler while building.
2878 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2879 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2880 dnl --disable-cxx-flags passes nothing.
2881 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2882 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2883 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2884 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2885 dnl If "default flags" is an empty string, the effect is the same
2886 dnl as --disable or --enable=no.
2888 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2889 AC_MSG_CHECKING([for extra compiler flags for building])
2890 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2891 [pass compiler FLAGS when building library],
2892 [case "x$enable_cxx_flags" in
2893 xno | x) enable_cxx_flags= ;;
2895 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2898 # Run through flags (either default or command-line) and set anything
2899 # extra (e.g., #defines) that must accompany particular g++ options.
2900 if test -n "$enable_cxx_flags"; then
2901 for f in $enable_cxx_flags; do
2905 *) # and we're trying to pass /what/ exactly?
2906 AC_MSG_ERROR([compiler flags start with a -]) ;;
2911 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2912 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2913 AC_SUBST(EXTRA_CXX_FLAGS)
2918 dnl Check to see if debugging libraries are to be built.
2920 dnl --enable-libstdcxx-debug
2921 dnl builds a separate set of debugging libraries in addition to the
2922 dnl normal (shared, static) libstdc++ binaries.
2924 dnl --disable-libstdcxx-debug
2925 dnl builds only one (non-debug) version of libstdc++.
2927 dnl --enable-libstdcxx-debug-flags=FLAGS
2928 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2930 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2931 dnl Where DEFAULT is either `yes' or `no'.
2933 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2934 AC_MSG_CHECKING([for additional debug build])
2936 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2937 if test x$enable_libstdcxx_debug = xyes; then
2938 if test -f $toplevel_builddir/../stage_final \
2939 && test -f $toplevel_builddir/../stage_current; then
2940 stage_final=`cat $toplevel_builddir/../stage_final`
2941 stage_current=`cat $toplevel_builddir/../stage_current`
2942 if test x$stage_current != x$stage_final ; then
2943 skip_debug_build=" (skipped for bootstrap stage $stage_current)"
2944 enable_libstdcxx_debug=no
2948 AC_MSG_RESULT($enable_libstdcxx_debug$skip_debug_build)
2949 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2954 dnl Check for explicit debug flags.
2956 dnl --enable-libstdcxx-debug-flags='-O1'
2957 dnl is a general method for passing flags to be used when
2958 dnl building debug libraries with --enable-libstdcxx-debug.
2960 dnl --disable-libstdcxx-debug-flags does nothing.
2961 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2962 dnl If "default flags" is an empty string, the effect is the same
2963 dnl as --disable or --enable=no.
2965 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2966 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2967 [pass compiler FLAGS when building debug library],
2968 [case "x$enable_libstdcxx_debug_flags" in
2969 xno | x) enable_libstdcxx_debug_flags= ;;
2971 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2974 # Option parsed, now set things appropriately
2975 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2976 AC_SUBST(DEBUG_FLAGS)
2978 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2983 dnl Check if the user only wants a freestanding library implementation.
2985 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2986 dnl installing only the headers required by [17.4.1.3] and the language
2987 dnl support library. More than that will be built (to keep the Makefiles
2988 dnl conveniently clean), but not installed.
2991 dnl is_hosted (yes/no)
2994 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2996 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2997 AC_ARG_ENABLE([hosted-libstdcxx],
2998 AC_HELP_STRING([--disable-hosted-libstdcxx],
2999 [only build freestanding C++ runtime support]),,
3002 enable_hosted_libstdcxx=no
3005 enable_hosted_libstdcxx=yes
3008 if test "$enable_hosted_libstdcxx" = no; then
3009 AC_MSG_NOTICE([Only freestanding libraries will be built])
3013 enable_libstdcxx_pch=no
3018 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
3019 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
3020 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
3025 dnl Check if the user wants a non-verbose library implementation.
3027 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
3028 dnl standard error on termination.
3031 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
3033 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
3034 AC_ARG_ENABLE([libstdcxx-verbose],
3035 AC_HELP_STRING([--disable-libstdcxx-verbose],
3036 [disable termination messages to standard error]),,
3037 [enable_libstdcxx_verbose=yes])
3038 if test x"$enable_libstdcxx_verbose" = xyes; then
3041 AC_MSG_NOTICE([verbose termination messages are disabled])
3044 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
3045 [Define to 1 if a verbose library is built, or 0 otherwise.])
3050 dnl Check for template specializations for the 'long long' type.
3051 dnl The result determines only whether 'long long' I/O is enabled; things
3052 dnl like numeric_limits<> specializations are always available.
3054 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
3055 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
3056 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
3057 dnl Where DEFAULT is either `yes' or `no'.
3059 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
3060 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
3061 if test $enable_long_long = yes; then
3062 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
3063 [Define if code specialized for long long should be used.])
3065 AC_MSG_CHECKING([for enabled long long specializations])
3066 AC_MSG_RESULT([$enable_long_long])
3071 dnl Check for decimal floating point.
3073 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
3075 dnl This checks to see if the host supports decimal floating point types.
3078 dnl _GLIBCXX_USE_DECIMAL_FLOAT
3080 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
3082 # Fake what AC_TRY_COMPILE does, without linking as this is
3083 # unnecessary for this test.
3085 cat > conftest.$ac_ext << EOF
3086 [#]line __oline__ "configure"
3096 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
3097 if AC_TRY_EVAL(ac_compile); then
3098 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
3099 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
3104 AC_MSG_RESULT($enable_dfp)
3109 dnl Check for GNU 128-bit integer and floating point types.
3111 dnl Note: also checks that the types aren't standard types.
3114 dnl _GLIBCXX_USE_INT128
3117 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
3122 # Fake what AC_TRY_COMPILE does, without linking as this is
3123 # unnecessary for this test.
3125 cat > conftest.$ac_ext << EOF
3126 [#]line __oline__ "configure"
3127 template<typename T1, typename T2>
3129 { typedef T2 type; };
3131 template<typename T>
3136 typename same<long, __int128>::type i1;
3137 typename same<long long, __int128>::type i2;
3141 AC_MSG_CHECKING([for __int128])
3142 if AC_TRY_EVAL(ac_compile); then
3143 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
3144 [Define if __int128 is supported on this host.])
3149 AC_MSG_RESULT($enable_int128)
3152 cat > conftest.$ac_ext << EOF
3153 [#]line __oline__ "configure"
3154 template<typename T1, typename T2>
3156 { typedef T2 type; };
3158 template<typename T>
3163 typename same<double, __float128>::type f1;
3164 typename same<long double, __float128>::type f2;
3168 AC_MSG_CHECKING([for __float128])
3169 if AC_TRY_EVAL(ac_compile); then
3174 AC_MSG_RESULT($enable_float128)
3175 GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes)
3182 dnl Check for template specializations for the 'wchar_t' type.
3184 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3185 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3186 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3187 dnl Where DEFAULT is either `yes' or `no'.
3189 dnl Necessary support must also be present.
3191 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3192 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3194 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3195 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3196 AC_MSG_CHECKING([for mbstate_t])
3197 AC_TRY_COMPILE([#include <wchar.h>],
3198 [mbstate_t teststate;],
3199 have_mbstate_t=yes, have_mbstate_t=no)
3200 AC_MSG_RESULT($have_mbstate_t)
3201 if test x"$have_mbstate_t" = xyes; then
3202 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3205 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3207 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3209 if test x"$enable_wchar_t" = x"yes"; then
3214 if test x"$ac_has_wchar_h" = xyes &&
3215 test x"$ac_has_wctype_h" = xyes; then
3216 AC_TRY_COMPILE([#include <wchar.h>
3277 ],[],[], [enable_wchar_t=no])
3285 if test x"$enable_wchar_t" = x"yes"; then
3286 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3287 [Define if code specialized for wchar_t should be used.])
3290 AC_MSG_CHECKING([for enabled wchar_t specializations])
3291 AC_MSG_RESULT([$enable_wchar_t])
3296 dnl Check to see if building and using a C++ precompiled header can be done.
3298 dnl --enable-libstdcxx-pch=yes
3299 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3300 dnl may work, after some light-hearted attempts to puzzle out compiler
3301 dnl support, flip bits on in include/Makefile.am
3303 dnl --disable-libstdcxx-pch
3304 dnl turns off attempts to use or build stdc++.h.gch.
3307 dnl glibcxx_PCHFLAGS
3309 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3310 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3311 if test $enable_libstdcxx_pch = yes; then
3312 AC_CACHE_CHECK([for compiler with PCH support],
3313 [glibcxx_cv_prog_CXX_pch],
3314 [ac_save_CXXFLAGS="$CXXFLAGS"
3315 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3318 echo '#include <math.h>' > conftest.h
3319 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3320 -o conftest.h.gch 1>&5 2>&1 &&
3321 echo '#error "pch failed"' > conftest.h &&
3322 echo '#include "conftest.h"' > conftest.cc &&
3323 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3325 glibcxx_cv_prog_CXX_pch=yes
3327 glibcxx_cv_prog_CXX_pch=no
3330 CXXFLAGS=$ac_save_CXXFLAGS
3333 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3336 AC_MSG_CHECKING([for enabled PCH])
3337 AC_MSG_RESULT([$enable_libstdcxx_pch])
3339 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3340 if test $enable_libstdcxx_pch = yes; then
3341 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3345 AC_SUBST(glibcxx_PCHFLAGS)
3350 dnl Check for atomic builtins.
3352 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3354 dnl This checks to see if the host supports the compiler-generated
3355 dnl builtins for atomic operations for various integral sizes. Note, this
3356 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3357 dnl that are used should be checked.
3360 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3362 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3365 old_CXXFLAGS="$CXXFLAGS"
3367 # Do link tests if possible, instead asm tests, limited to some platforms
3368 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3369 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3370 atomic_builtins_link_tests=no
3371 if test x$gcc_no_link != xyes; then
3372 # Can do link tests. Limit to some tested platforms
3374 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3375 atomic_builtins_link_tests=yes
3380 if test x$atomic_builtins_link_tests = xyes; then
3384 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3386 AC_MSG_CHECKING([for atomic builtins for bool])
3387 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3390 [typedef bool atomic_type;
3394 // N.B. __atomic_fetch_add is not supported for bool.
3395 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3397 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3398 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3400 [glibcxx_cv_atomic_bool=yes],
3401 [glibcxx_cv_atomic_bool=no])
3403 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3405 AC_MSG_CHECKING([for atomic builtins for short])
3406 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3409 [typedef short atomic_type;
3413 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3414 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3416 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3417 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3419 [glibcxx_cv_atomic_short=yes],
3420 [glibcxx_cv_atomic_short=no])
3422 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3424 AC_MSG_CHECKING([for atomic builtins for int])
3425 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3428 [typedef int atomic_type;
3432 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3433 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3435 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3436 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3438 [glibcxx_cv_atomic_int=yes],
3439 [glibcxx_cv_atomic_int=no])
3441 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3443 AC_MSG_CHECKING([for atomic builtins for long long])
3444 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3447 [typedef long long atomic_type;
3451 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3452 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3454 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3455 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3457 [glibcxx_cv_atomic_long_long=yes],
3458 [glibcxx_cv_atomic_long_long=no])
3460 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3466 # Compile unoptimized.
3469 # Fake what AC_TRY_COMPILE does.
3471 cat > conftest.$ac_ext << EOF
3472 [#]line __oline__ "configure"
3475 typedef bool atomic_type;
3479 // N.B. __atomic_fetch_add is not supported for bool.
3480 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3482 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3483 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3489 AC_MSG_CHECKING([for atomic builtins for bool])
3490 if AC_TRY_EVAL(ac_compile); then
3491 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3492 glibcxx_cv_atomic_bool=no
3494 glibcxx_cv_atomic_bool=yes
3497 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3500 cat > conftest.$ac_ext << EOF
3501 [#]line __oline__ "configure"
3504 typedef short atomic_type;
3508 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3509 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3511 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3512 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3518 AC_MSG_CHECKING([for atomic builtins for short])
3519 if AC_TRY_EVAL(ac_compile); then
3520 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3521 glibcxx_cv_atomic_short=no
3523 glibcxx_cv_atomic_short=yes
3526 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3529 cat > conftest.$ac_ext << EOF
3530 [#]line __oline__ "configure"
3533 // NB: _Atomic_word not necessarily int.
3534 typedef int atomic_type;
3538 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3539 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3541 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3542 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3548 AC_MSG_CHECKING([for atomic builtins for int])
3549 if AC_TRY_EVAL(ac_compile); then
3550 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3551 glibcxx_cv_atomic_int=no
3553 glibcxx_cv_atomic_int=yes
3556 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3559 cat > conftest.$ac_ext << EOF
3560 [#]line __oline__ "configure"
3563 typedef long long atomic_type;
3567 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3568 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3570 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3571 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3577 AC_MSG_CHECKING([for atomic builtins for long long])
3578 if AC_TRY_EVAL(ac_compile); then
3579 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3580 glibcxx_cv_atomic_long_long=no
3582 glibcxx_cv_atomic_long_long=yes
3585 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3590 CXXFLAGS="$old_CXXFLAGS"
3593 # Set atomicity_dir to builtins if all but the long long test above passes,
3594 # or if the builtins were already chosen (e.g. by configure.host).
3595 if { test "$glibcxx_cv_atomic_bool" = yes \
3596 && test "$glibcxx_cv_atomic_short" = yes \
3597 && test "$glibcxx_cv_atomic_int" = yes; } \
3598 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
3599 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3600 [Define if the compiler supports C++11 atomics.])
3601 atomicity_dir=cpu/generic/atomicity_builtins
3604 # If still generic, set to mutex.
3605 if test $atomicity_dir = "cpu/generic" ; then
3606 atomicity_dir=cpu/generic/atomicity_mutex
3607 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3608 if test "x$target_thread_file" = xsingle; then
3609 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3610 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3612 AC_MSG_WARN([They will be faked using a mutex.])
3613 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3620 dnl Set default lock policy for synchronizing shared_ptr reference counting.
3622 dnl --with-libstdcxx-lock-policy=auto
3623 dnl Use atomic operations for shared_ptr reference counting only if
3624 dnl the default target supports atomic compare-and-swap.
3625 dnl --with-libstdcxx-lock-policy=atomic
3626 dnl Use atomic operations for shared_ptr reference counting.
3627 dnl --with-libstdcxx-lock-policy=mutex
3628 dnl Use a mutex to synchronize shared_ptr reference counting.
3630 dnl This controls the value of __gnu_cxx::__default_lock_policy, which
3631 dnl determines how shared_ptr reference counts are synchronized.
3632 dnl The option "atomic" means that atomic operations should be used,
3633 dnl "mutex" means that a mutex will be used. The default option, "auto",
3634 dnl will check if the target supports the compiler-generated builtins
3635 dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers,
3636 dnl and will use "atomic" if supported, "mutex" otherwise.
3637 dnl This option is ignored if the thread model used by GCC is "single",
3638 dnl as no synchronization is used at all in that case.
3639 dnl This option affects the library ABI (except in the "single" thread model).
3641 dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used.
3643 AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [
3645 AC_ARG_WITH([libstdcxx-lock-policy],
3646 AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}],
3647 [synchronization policy for shared_ptr reference counting [default=auto]]),
3648 [libstdcxx_atomic_lock_policy=$withval],
3649 [libstdcxx_atomic_lock_policy=auto])
3651 case "$libstdcxx_atomic_lock_policy" in
3652 atomic|mutex|auto) ;;
3653 *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;;
3655 AC_MSG_CHECKING([for lock policy for shared_ptr reference counts])
3657 if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then
3660 ac_save_CXXFLAGS="$CXXFLAGS"
3662 dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?!
3664 #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
3665 # error "No 2-byte compare-and-swap"
3666 #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
3667 # error "No 4-byte compare-and-swap"
3670 [libstdcxx_atomic_lock_policy=atomic],
3671 [libstdcxx_atomic_lock_policy=mutex])
3673 CXXFLAGS="$ac_save_CXXFLAGS"
3676 if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then
3677 AC_MSG_RESULT(atomic)
3678 AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1,
3679 [Defined if shared_ptr reference counting should use atomic operations.])
3681 AC_MSG_RESULT(mutex)
3687 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3689 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3690 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3691 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3692 dnl Where DEFAULT is 'yes'.
3694 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3695 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3697 if test x$enable_libstdcxx_visibility = xyes ; then
3698 dnl all hail libgfortran
3699 dnl Check whether the target supports hidden visibility.
3700 AC_CACHE_CHECK([whether the target supports hidden visibility],
3701 glibcxx_cv_have_attribute_visibility, [
3702 save_CFLAGS="$CFLAGS"
3703 CFLAGS="$CFLAGS -Werror"
3704 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3705 [], glibcxx_cv_have_attribute_visibility=yes,
3706 glibcxx_cv_have_attribute_visibility=no)
3707 CFLAGS="$save_CFLAGS"])
3708 if test $glibcxx_cv_have_attribute_visibility = no; then
3709 enable_libstdcxx_visibility=no
3713 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3714 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3719 dnl Add version tags to symbols in shared library (or not), additionally
3720 dnl marking other symbols as private/local (or not).
3722 dnl Sets libtool_VERSION, and determines shared library SONAME.
3724 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3726 dnl --enable-symvers=style adds a version script to the linker call when
3727 dnl creating the shared library. The choice of version script is
3728 dnl controlled by 'style'.
3729 dnl --disable-symvers does not.
3731 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3732 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3733 dnl choose a default style based on linker characteristics. Passing
3734 dnl 'no' disables versioning.
3736 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3738 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3739 [enables symbol versioning of the shared library],
3740 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3742 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3743 # don't know enough about $LD to do tricks...
3744 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3745 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3746 # with extern "C++" in version scripts.
3747 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3749 # Turn a 'yes' into a suitable default.
3750 if test x$enable_symvers = xyes ; then
3751 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3754 if test $with_gnu_ld = yes ; then
3755 case ${target_os} in
3757 enable_symvers=no ;;
3759 enable_symvers=gnu ;;
3762 case ${target_os} in
3764 enable_symvers=darwin ;;
3765 # Sun symbol versioning exists since Solaris 2.5.
3766 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3767 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3768 # version scripts, so disable symbol versioning if none can be
3770 if test -z "$ac_cv_path_CXXFILT"; then
3771 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3772 AC_MSG_WARN([=== no GNU c++filt could be found.])
3773 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3780 enable_symvers=no ;;
3786 # Check to see if 'darwin' or 'darwin-export' can win.
3787 if test x$enable_symvers = xdarwin-export ; then
3788 enable_symvers=darwin
3791 # Check if 'sun' was requested on non-Solaris 2 platforms.
3792 if test x$enable_symvers = xsun ; then
3793 case ${target_os} in
3799 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3800 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3801 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3807 # Check to see if 'gnu' can win.
3808 if test $enable_symvers = gnu ||
3809 test $enable_symvers = gnu-versioned-namespace ||
3810 test $enable_symvers = sun; then
3811 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3812 AC_MSG_CHECKING([for shared libgcc])
3813 ac_save_CFLAGS="$CFLAGS"
3815 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3816 CFLAGS="$ac_save_CFLAGS"
3817 if test $glibcxx_shared_libgcc = no; then
3818 cat > conftest.c <<EOF
3819 int main (void) { return 0; }
3822 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3823 -shared -shared-libgcc -o conftest.so \
3824 conftest.c -v 2>&1 >/dev/null \
3825 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3827 rm -f conftest.c conftest.so
3828 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3829 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3830 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3831 CFLAGS="$ac_save_CFLAGS"
3834 AC_MSG_RESULT($glibcxx_shared_libgcc)
3836 # For GNU ld, we need at least this version. The format is described in
3837 # GLIBCXX_CHECK_LINKER_FEATURES above.
3838 glibcxx_min_gnu_ld_version=21400
3840 # If no shared libgcc, can't win.
3841 if test $glibcxx_shared_libgcc != yes; then
3842 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3843 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3844 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3846 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3847 : All interesting versions of Sun ld support sun style symbol versioning.
3848 elif test $with_gnu_ld != yes ; then
3850 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3851 AC_MSG_WARN([=== you are not using the GNU linker.])
3852 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3854 elif test $glibcxx_ld_is_gold = yes ; then
3855 : All versions of gold support symbol versioning.
3856 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3857 # The right tools, the right setup, but too old. Fallbacks?
3858 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3859 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3860 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3861 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3862 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3867 # For libtool versioning info, format is CURRENT:REVISION:AGE
3868 libtool_VERSION=6:29:0
3870 # Everything parsed; figure out what files and settings to use.
3871 case $enable_symvers in
3873 SYMVER_FILE=config/abi/pre/none.ver
3876 SYMVER_FILE=config/abi/pre/gnu.ver
3877 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3878 [Define to use GNU versioning in the shared library.])
3880 gnu-versioned-namespace)
3881 libtool_VERSION=8:0:0
3882 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3883 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3884 [Define to use GNU namespace versioning in the shared library.])
3887 SYMVER_FILE=config/abi/pre/gnu.ver
3888 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3889 [Define to use darwin versioning in the shared library.])
3892 SYMVER_FILE=config/abi/pre/gnu.ver
3893 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3894 [Define to use Sun versioning in the shared library.])
3898 if test x$enable_symvers != xno ; then
3899 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3900 [Define to use symbol versioning in the shared library.])
3903 AC_CACHE_CHECK([whether the target supports .symver directive],
3904 glibcxx_cv_have_as_symver_directive, [
3905 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3906 [], glibcxx_cv_have_as_symver_directive=yes,
3907 glibcxx_cv_have_as_symver_directive=no)])
3908 if test $glibcxx_cv_have_as_symver_directive = yes; then
3909 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3910 [Define to 1 if the target assembler supports .symver directive.])
3913 AC_SUBST(SYMVER_FILE)
3914 AC_SUBST(port_specific_symbol_files)
3915 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3916 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3917 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3918 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3919 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3920 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3922 if test $enable_symvers != no ; then
3923 case ${target_os} in
3924 # The Solaris 2 runtime linker doesn't support the GNU extension of
3925 # binding the same symbol to different versions
3928 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3930 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3931 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3936 # Now, set up compatibility support, if any.
3937 # In addition, need this to deal with std::size_t mangling in
3938 # src/compatibility.cc. In a perfect world, could use
3939 # typeid(std::size_t).name()[0] to do direct substitution.
3940 AC_MSG_CHECKING([for size_t as unsigned int])
3941 ac_save_CFLAGS="$CFLAGS"
3943 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3944 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3945 CFLAGS=$ac_save_CFLAGS
3946 if test "$glibcxx_size_t_is_i" = yes; then
3947 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3949 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3951 AC_MSG_CHECKING([for ptrdiff_t as int])
3952 ac_save_CFLAGS="$CFLAGS"
3954 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3955 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3956 CFLAGS=$ac_save_CFLAGS
3957 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3958 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3960 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3965 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3966 dnl We must stage the required headers so that they will be installed
3967 dnl with the library (unlike libgcc, the STL implementation is provided
3968 dnl solely within headers). Since we must not inject random user-space
3969 dnl macro names into user-provided C++ code, we first stage into <file>-in
3970 dnl and process to <file> with an output command. The reason for a two-
3971 dnl stage process here is to correctly handle $srcdir!=$objdir without
3972 dnl having to write complex code (the sed commands to clean the macro
3973 dnl namespace are complex and fragile enough as it is). We must also
3974 dnl add a relative path so that -I- is supported properly.
3979 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3980 AC_MSG_CHECKING([for thread model used by GCC])
3981 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3982 AC_MSG_RESULT([$target_thread_file])
3983 GCC_AC_THREAD_HEADER([$target_thread_file])
3988 dnl Check if gthread implementation defines the types and functions
3989 dnl required by the c++0x thread library. Conforming gthread
3990 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3992 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3994 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3995 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3997 if test x$enable_libstdcxx_threads = xauto ||
3998 test x$enable_libstdcxx_threads = xyes; then
4003 ac_save_CXXFLAGS="$CXXFLAGS"
4004 CXXFLAGS="$CXXFLAGS -fno-exceptions \
4005 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
4007 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
4008 case $target_thread_file in
4010 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
4013 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
4015 AC_TRY_COMPILE([#include <unistd.h>],
4017 // In case of POSIX threads check _POSIX_TIMEOUTS.
4018 #if (defined(_PTHREADS) \
4019 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
4022 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
4024 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
4025 [Define to 1 if mutex_timedlock is available.])
4027 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
4028 else res_mutex_timedlock=no ; fi
4029 AC_MSG_RESULT([$res_mutex_timedlock])
4031 AC_MSG_CHECKING([for gthreads library])
4033 AC_TRY_COMPILE([#include "gthr.h"],
4035 #ifndef __GTHREADS_CXX0X
4038 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
4043 AC_MSG_RESULT([$ac_has_gthreads])
4045 if test x"$ac_has_gthreads" = x"yes"; then
4046 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
4047 [Define if gthreads library is available.])
4049 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
4050 # but only do so if we're using pthread in the gthread library.
4051 # On VxWorks for example, pthread_rwlock_t is defined in sys/types.h
4052 # but the pthread library is not there by default and the gthread library
4054 AC_TRY_COMPILE([#include "gthr.h"],
4056 #if (!defined(_PTHREADS))
4059 ], [ac_gthread_use_pthreads=yes], [ac_gthread_use_pthreads=no])
4060 if test x"$ac_gthread_use_pthreads" = x"yes"; then
4061 AC_CHECK_TYPE([pthread_rwlock_t],
4062 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
4063 [Define if POSIX read/write locks are available in <gthr.h>.])],
4065 [#include "gthr.h"])
4069 AC_CHECK_HEADER(semaphore.h, [
4070 AC_MSG_CHECKING([for POSIX Semaphores and sem_timedwait])
4073 #include <semaphore.h>
4077 #if !defined _POSIX_TIMEOUTS || _POSIX_TIMEOUTS <= 0
4078 # error "POSIX Timeouts option not supported"
4079 #elif !defined _POSIX_SEMAPHORES || _POSIX_SEMAPHORES <= 0
4080 # error "POSIX Semaphores option not supported"
4082 #if defined SEM_VALUE_MAX
4083 constexpr int sem_value_max = SEM_VALUE_MAX;
4084 #elif defined _POSIX_SEM_VALUE_MAX
4085 constexpr int sem_value_max = _POSIX_SEM_VALUE_MAX;
4087 # error "SEM_VALUE_MAX not available"
4090 sem_init(&sem, 0, sem_value_max);
4091 struct timespec ts = { 0 };
4092 sem_timedwait(&sem, &ts);
4095 [ac_have_posix_semaphore=yes],
4096 [ac_have_posix_semaphore=no])],
4097 [ac_have_posix_semaphore=no])
4099 if test $ac_have_posix_semaphore = yes ; then
4100 AC_DEFINE(_GLIBCXX_HAVE_POSIX_SEMAPHORE,
4102 [Define to 1 if POSIX Semaphores with sem_timedwait are available in <semaphore.h>.])
4104 AC_MSG_RESULT([$ac_have_posix_semaphore])
4106 CXXFLAGS="$ac_save_CXXFLAGS"
4111 # Check whether LC_MESSAGES is available in <locale.h>.
4112 # Ulrich Drepper <drepper@cygnus.com>, 1995.
4114 # This file file be copied and used freely without restrictions. It can
4115 # be used in projects which are not available under the GNU Public License
4116 # but which still want to provide support for the GNU gettext functionality.
4117 # Please note that the actual code is *not* freely available.
4118 AC_DEFUN([AC_LC_MESSAGES], [
4119 AC_CHECK_HEADER(locale.h, [
4120 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
4121 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
4122 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
4123 if test $ac_cv_val_LC_MESSAGES = yes; then
4124 AC_DEFINE(HAVE_LC_MESSAGES, 1,
4125 [Define if LC_MESSAGES is available in <locale.h>.])
4131 dnl Check whether rdrand is supported in the assembler.
4132 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
4133 AC_MSG_CHECKING([for rdrand support in assembler])
4134 AC_CACHE_VAL(ac_cv_x86_rdrand, [
4139 AC_TRY_COMPILE(, [asm("rdrand %eax");],
4140 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
4143 if test $ac_cv_x86_rdrand = yes; then
4144 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
4145 [ Defined if as can handle rdrand. ])
4147 AC_MSG_RESULT($ac_cv_x86_rdrand)
4151 dnl Check whether rdseed is supported in the assembler.
4152 AC_DEFUN([GLIBCXX_CHECK_X86_RDSEED], [
4153 AC_MSG_CHECKING([for rdseed support in assembler])
4154 AC_CACHE_VAL(ac_cv_x86_rdseed, [
4159 AC_TRY_COMPILE(, [asm("rdseed %eax");],
4160 [ac_cv_x86_rdseed=yes], [ac_cv_x86_rdseed=no])
4163 if test $ac_cv_x86_rdseed = yes; then
4164 AC_DEFINE(_GLIBCXX_X86_RDSEED, 1,
4165 [ Defined if as can handle rdseed. ])
4167 AC_MSG_RESULT($ac_cv_x86_rdseed)
4171 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
4173 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
4177 ac_save_CXXFLAGS="$CXXFLAGS"
4178 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4180 AC_MSG_CHECKING([for get_nprocs])
4181 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
4182 GCC_TRY_COMPILE_OR_LINK(
4183 [#include <sys/sysinfo.h>],
4184 [int n = get_nprocs();],
4185 [glibcxx_cv_GET_NPROCS=yes],
4186 [glibcxx_cv_GET_NPROCS=no])
4188 if test $glibcxx_cv_GET_NPROCS = yes; then
4189 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
4191 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
4193 CXXFLAGS="$ac_save_CXXFLAGS"
4198 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
4200 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
4204 ac_save_CXXFLAGS="$CXXFLAGS"
4205 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4207 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
4208 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
4209 GCC_TRY_COMPILE_OR_LINK(
4210 [#include <unistd.h>],
4211 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
4212 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
4213 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
4215 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
4216 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
4218 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
4220 CXXFLAGS="$ac_save_CXXFLAGS"
4225 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
4227 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
4231 ac_save_CXXFLAGS="$CXXFLAGS"
4232 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4234 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
4235 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
4236 GCC_TRY_COMPILE_OR_LINK(
4237 [#include <unistd.h>],
4238 [int n = sysconf(_SC_NPROC_ONLN);],
4239 [glibcxx_cv_SC_NPROC_ONLN=yes],
4240 [glibcxx_cv_SC_NPROC_ONLN=no])
4242 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
4243 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
4245 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
4247 CXXFLAGS="$ac_save_CXXFLAGS"
4252 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
4254 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
4258 ac_save_CXXFLAGS="$CXXFLAGS"
4259 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4261 AC_MSG_CHECKING([for pthreads_num_processors_np])
4262 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
4263 GCC_TRY_COMPILE_OR_LINK(
4264 [#include <pthread.h>],
4265 [int n = pthread_num_processors_np();],
4266 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
4267 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
4269 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
4270 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
4272 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
4274 CXXFLAGS="$ac_save_CXXFLAGS"
4279 dnl Check whether pthread_cond_clockwait is available in <pthread.h> for std::condition_variable to use,
4280 dnl and define _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT.
4282 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT], [
4286 ac_save_CXXFLAGS="$CXXFLAGS"
4287 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4288 ac_save_LIBS="$LIBS"
4289 LIBS="$LIBS -lpthread"
4291 AC_MSG_CHECKING([for pthread_cond_clockwait])
4292 AC_CACHE_VAL(glibcxx_cv_PTHREAD_COND_CLOCKWAIT, [
4293 GCC_TRY_COMPILE_OR_LINK(
4294 [#include <pthread.h>],
4295 [pthread_mutex_t mutex; pthread_cond_t cond; struct timespec ts; int n = pthread_cond_clockwait(&cond, &mutex, 0, &ts);],
4296 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=yes],
4297 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=no])
4299 if test $glibcxx_cv_PTHREAD_COND_CLOCKWAIT = yes; then
4300 AC_DEFINE(_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT, 1, [Define if pthread_cond_clockwait is available in <pthread.h>.])
4302 AC_MSG_RESULT($glibcxx_cv_PTHREAD_COND_CLOCKWAIT)
4304 CXXFLAGS="$ac_save_CXXFLAGS"
4305 LIBS="$ac_save_LIBS"
4310 dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use,
4311 dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK.
4313 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK], [
4317 ac_save_CXXFLAGS="$CXXFLAGS"
4318 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4319 ac_save_LIBS="$LIBS"
4320 LIBS="$LIBS -lpthread"
4322 AC_MSG_CHECKING([for pthread_mutex_clocklock])
4323 AC_CACHE_VAL(glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK, [
4324 GCC_TRY_COMPILE_OR_LINK(
4325 [#include <pthread.h>],
4326 [pthread_mutex_t mutex; struct timespec ts; int n = pthread_mutex_clocklock(&mutex, CLOCK_REALTIME, &ts);],
4327 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=yes],
4328 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=no])
4330 if test $glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK = yes; then
4331 AC_DEFINE(_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK, 1, [Define if pthread_mutex_clocklock is available in <pthread.h>.])
4333 AC_MSG_RESULT($glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK)
4335 CXXFLAGS="$ac_save_CXXFLAGS"
4336 LIBS="$ac_save_LIBS"
4341 dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use,
4342 dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK.
4344 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_RWLOCK_CLOCKLOCK], [
4348 ac_save_CXXFLAGS="$CXXFLAGS"
4349 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4350 ac_save_LIBS="$LIBS"
4351 LIBS="$LIBS -lpthread"
4353 AC_MSG_CHECKING([for pthread_rwlock_clockrdlock, pthread_wlock_clockwrlock])
4354 AC_CACHE_VAL(glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK, [
4355 GCC_TRY_COMPILE_OR_LINK(
4356 [#include <pthread.h>],
4357 [pthread_rwlock_t rwl; struct timespec ts;]
4358 [int n = pthread_rwlock_clockrdlock(&rwl, CLOCK_REALTIME, &ts);]
4359 [int m = pthread_rwlock_clockwrlock(&rwl, CLOCK_REALTIME, &ts);],
4360 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=yes],
4361 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=no])
4363 if test $glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK = yes; then
4364 AC_DEFINE(_GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK, 1, [Define if pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock are available in <pthread.h>.])
4366 AC_MSG_RESULT($glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK)
4368 CXXFLAGS="$ac_save_CXXFLAGS"
4369 LIBS="$ac_save_LIBS"
4374 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
4376 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4380 ac_save_CXXFLAGS="$CXXFLAGS"
4381 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4383 AC_MSG_CHECKING([for hw.ncpu sysctl])
4384 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4385 GCC_TRY_COMPILE_OR_LINK(
4388 #include <sys/sysctl.h>
4392 size_t size = sizeof(count);
4393 int mib[] = { CTL_HW, HW_NCPU };
4394 sysctl(mib, 2, &count, &size, NULL, 0);
4396 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4397 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4399 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4400 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4402 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4404 CXXFLAGS="$ac_save_CXXFLAGS"
4409 dnl Check to see if python pretty printing can be activated.
4411 dnl --with-python-dir=dir
4412 dnl installs directory into $prefix/dir
4413 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4415 AC_MSG_CHECKING([for custom python install directory])
4416 AC_ARG_WITH([python-dir],
4417 AS_HELP_STRING([--with-python-dir],
4418 [the location to install Python modules. This path is relative starting from the prefix.]),
4419 [with_python_dir=$withval], [with_python_dir="no"])
4420 AC_MSG_RESULT(${with_python_dir})
4422 # Needed for installing Python modules during make install.
4423 python_mod_dir="${with_python_dir}"
4424 AC_SUBST(python_mod_dir)
4425 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4429 dnl Check to see if -Werror is disabled.
4431 dnl --enable-werror/--disable-werror
4432 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4433 AC_MSG_CHECKING([for -Werror])
4434 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4435 AC_MSG_RESULT($enable_werror)
4436 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4440 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4441 dnl and define _GLIBCXX_USE_TMPNAM.
4443 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4447 ac_save_CXXFLAGS="$CXXFLAGS"
4448 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4450 AC_MSG_CHECKING([for tmpnam])
4451 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4452 GCC_TRY_COMPILE_OR_LINK(
4453 [#include <stdio.h>],
4454 [char *tmp = tmpnam(NULL);],
4455 [glibcxx_cv_TMPNAM=yes],
4456 [glibcxx_cv_TMPNAM=no])
4458 if test $glibcxx_cv_TMPNAM = yes; then
4459 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4461 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4463 CXXFLAGS="$ac_save_CXXFLAGS"
4468 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4469 dnl Some versions of sdt.h were not compatible with C++11.
4471 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4472 AC_MSG_CHECKING([for suitable sys/sdt.h])
4473 # Note that this test has to be run with the C language.
4474 # Otherwise, sdt.h will try to include some headers from
4478 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4479 # Because we have to run the test in C, we use grep rather
4480 # than the compiler to check for the bug. The bug is that
4481 # were strings without trailing whitespace, causing g++
4482 # to look for operator"". The pattern searches for the fixed
4484 AC_EGREP_CPP([ \",\" ], [
4485 #include <sys/sdt.h>
4486 int f() { STAP_PROBE(hi, bob); }
4487 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4490 if test $glibcxx_cv_sys_sdt_h = yes; then
4491 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4492 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4494 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4498 dnl Control whether the library should define symbols for old and new ABIs.
4499 dnl This affects definitions of strings, stringstreams and locale facets.
4501 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4504 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4506 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4507 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4508 if test x$enable_symvers = xgnu-versioned-namespace; then
4509 # gnu-versioned-namespace is incompatible with the dual ABI.
4510 enable_libstdcxx_dual_abi="no"
4512 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4513 AC_MSG_NOTICE([dual ABI is disabled])
4514 default_libstdcxx_abi="gcc4-compatible"
4516 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4520 dnl Check to see which ABI should be enabled by default.
4522 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4525 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4527 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4528 if test x$enable_libstdcxx_dual_abi = xyes; then
4529 AC_MSG_CHECKING([for default std::string ABI to use])
4530 AC_ARG_WITH([default-libstdcxx-abi],
4531 AS_HELP_STRING([--with-default-libstdcxx-abi],
4532 [set the std::string ABI to use by default]),
4534 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4535 new|cxx11) default_libstdcxx_abi="new" ;;
4536 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4537 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4540 [default_libstdcxx_abi="new"])
4541 AC_MSG_RESULT(${default_libstdcxx_abi})
4543 if test $default_libstdcxx_abi = "new"; then
4550 AC_SUBST(glibcxx_cxx98_abi)
4551 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4555 dnl Check to see whether to build libstdc++fs.a
4557 dnl --enable-libstdcxx-filesystem-ts
4559 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4560 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4561 [turns on ISO/IEC TS 18822 support],
4562 [permit yes|no|auto])
4564 AC_MSG_CHECKING([whether to build Filesystem TS support])
4565 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4566 enable_libstdcxx_filesystem_ts=no
4568 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4569 case "${target_os}" in
4570 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4571 enable_libstdcxx_filesystem_ts=yes
4573 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu | uclinux*)
4574 enable_libstdcxx_filesystem_ts=yes
4577 enable_libstdcxx_filesystem_ts=yes
4580 enable_libstdcxx_filesystem_ts=yes
4583 enable_libstdcxx_filesystem_ts=yes
4586 enable_libstdcxx_filesystem_ts=no
4590 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4591 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4595 dnl Check whether the library calls required by the C++17 Filesystem library
4596 dnl and the Filesystem TS are present.
4598 dnl HAVE_STRUCT_DIRENT_D_TYPE
4599 dnl _GLIBCXX_USE_REALPATH
4600 dnl _GLIBCXX_USE_UTIMENSAT
4601 dnl _GLIBCXX_USE_ST_MTIM
4602 dnl _GLIBCXX_USE_FCHMOD
4603 dnl _GLIBCXX_USE_FCHMODAT
4604 dnl _GLIBCXX_USE_SENDFILE
4609 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4613 ac_save_CXXFLAGS="$CXXFLAGS"
4614 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4616 AC_MSG_CHECKING([for struct dirent.d_type])
4617 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4618 GCC_TRY_COMPILE_OR_LINK(
4619 [#include <dirent.h>],
4622 if (sizeof d.d_type) return 0;
4624 [glibcxx_cv_dirent_d_type=yes],
4625 [glibcxx_cv_dirent_d_type=no])
4627 if test $glibcxx_cv_dirent_d_type = yes; then
4628 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4630 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
4632 AC_MSG_CHECKING([for realpath])
4633 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4634 GCC_TRY_COMPILE_OR_LINK(
4641 #if _XOPEN_VERSION < 500
4643 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4644 char *tmp = realpath((const char*)NULL, (char*)NULL);
4649 [glibcxx_cv_realpath=yes],
4650 [glibcxx_cv_realpath=no])
4652 if test $glibcxx_cv_realpath = yes; then
4653 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4655 AC_MSG_RESULT($glibcxx_cv_realpath)
4657 AC_MSG_CHECKING([for utimensat])
4658 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4659 GCC_TRY_COMPILE_OR_LINK(
4662 #include <sys/stat.h>
4665 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4666 int i = utimensat(AT_FDCWD, "path", ts, 0);
4668 [glibcxx_cv_utimensat=yes],
4669 [glibcxx_cv_utimensat=no])
4671 if test $glibcxx_cv_utimensat = yes; then
4672 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4674 AC_MSG_RESULT($glibcxx_cv_utimensat)
4676 AC_MSG_CHECKING([for utime])
4677 AC_CACHE_VAL(glibcxx_cv_utime, [dnl
4678 GCC_TRY_COMPILE_OR_LINK(
4683 struct utimbuf t = { 1, 1 };
4684 int i = utime("path", &t);
4686 [glibcxx_cv_utime=yes],
4687 [glibcxx_cv_utime=no])
4689 if test $glibcxx_cv_utime = yes; then
4690 AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.])
4692 AC_MSG_RESULT($glibcxx_cv_utime)
4694 AC_MSG_CHECKING([for lstat])
4695 AC_CACHE_VAL(glibcxx_cv_lstat, [dnl
4696 GCC_TRY_COMPILE_OR_LINK(
4697 [ #include <sys/stat.h> ],
4700 int i = lstat("path", &st);
4702 [glibcxx_cv_lstat=yes],
4703 [glibcxx_cv_lstat=no])
4705 if test $glibcxx_cv_lstat = yes; then
4706 AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.])
4708 AC_MSG_RESULT($glibcxx_cv_lstat)
4710 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4711 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4712 GCC_TRY_COMPILE_OR_LINK(
4713 [ #include <sys/stat.h> ],
4716 return st.st_mtim.tv_nsec;
4718 [glibcxx_cv_st_mtim=yes],
4719 [glibcxx_cv_st_mtim=no])
4721 if test $glibcxx_cv_st_mtim = yes; then
4722 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4724 AC_MSG_RESULT($glibcxx_cv_st_mtim)
4726 AC_MSG_CHECKING([for fchmod])
4727 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4728 GCC_TRY_COMPILE_OR_LINK(
4729 [#include <sys/stat.h>],
4730 [fchmod(1, S_IWUSR);],
4731 [glibcxx_cv_fchmod=yes],
4732 [glibcxx_cv_fchmod=no])
4734 if test $glibcxx_cv_fchmod = yes; then
4735 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4737 AC_MSG_RESULT($glibcxx_cv_fchmod)
4739 AC_MSG_CHECKING([for fchmodat])
4740 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4741 GCC_TRY_COMPILE_OR_LINK(
4744 #include <sys/stat.h>
4746 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4747 [glibcxx_cv_fchmodat=yes],
4748 [glibcxx_cv_fchmodat=no])
4750 if test $glibcxx_cv_fchmodat = yes; then
4751 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4753 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4755 AC_MSG_CHECKING([for sendfile that can copy files])
4756 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4757 case "${target_os}" in
4758 gnu* | linux* | solaris* | uclinux*)
4759 GCC_TRY_COMPILE_OR_LINK(
4760 [#include <sys/sendfile.h>],
4761 [sendfile(1, 2, (off_t*)0, sizeof 1);],
4762 [glibcxx_cv_sendfile=yes],
4763 [glibcxx_cv_sendfile=no])
4766 glibcxx_cv_sendfile=no
4770 if test $glibcxx_cv_sendfile = yes; then
4771 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.])
4773 AC_MSG_RESULT($glibcxx_cv_sendfile)
4775 AC_MSG_CHECKING([for link])
4776 AC_CACHE_VAL(glibcxx_cv_link, [dnl
4777 GCC_TRY_COMPILE_OR_LINK(
4778 [#include <unistd.h>],
4780 [glibcxx_cv_link=yes],
4781 [glibcxx_cv_link=no])
4783 if test $glibcxx_cv_link = yes; then
4784 AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.])
4786 AC_MSG_RESULT($glibcxx_cv_link)
4788 AC_MSG_CHECKING([for readlink])
4789 AC_CACHE_VAL(glibcxx_cv_readlink, [dnl
4790 GCC_TRY_COMPILE_OR_LINK(
4791 [#include <unistd.h>],
4792 [char buf[32]; readlink("", buf, sizeof(buf));],
4793 [glibcxx_cv_readlink=yes],
4794 [glibcxx_cv_readlink=no])
4796 if test $glibcxx_cv_readlink = yes; then
4797 AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.])
4799 AC_MSG_RESULT($glibcxx_cv_readlink)
4801 AC_MSG_CHECKING([for symlink])
4802 AC_CACHE_VAL(glibcxx_cv_symlink, [dnl
4803 GCC_TRY_COMPILE_OR_LINK(
4804 [#include <unistd.h>],
4806 [glibcxx_cv_symlink=yes],
4807 [glibcxx_cv_symlink=no])
4809 if test $glibcxx_cv_symlink = yes; then
4810 AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.])
4812 AC_MSG_RESULT($glibcxx_cv_symlink)
4814 AC_MSG_CHECKING([for truncate])
4815 AC_CACHE_VAL(glibcxx_cv_truncate, [dnl
4816 GCC_TRY_COMPILE_OR_LINK(
4817 [#include <unistd.h>],
4818 [truncate("", 99);],
4819 [glibcxx_cv_truncate=yes],
4820 [glibcxx_cv_truncate=no])
4822 if test $glibcxx_cv_truncate = yes; then
4823 AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.])
4825 AC_MSG_RESULT($glibcxx_cv_truncate)
4827 CXXFLAGS="$ac_save_CXXFLAGS"
4832 dnl Check how size_t is mangled. Copied from libitm.
4834 AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4835 AC_CACHE_CHECK([how size_t is mangled],
4836 glibcxx_cv_size_t_mangling, [
4837 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4838 [glibcxx_cv_size_t_mangling=m], [
4839 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4840 [glibcxx_cv_size_t_mangling=j], [
4842 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4843 [glibcxx_cv_size_t_mangling=y], [
4845 [extern __SIZE_TYPE__ x; extern unsigned short x;],
4846 [glibcxx_cv_size_t_mangling=t], [
4848 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;],
4849 [glibcxx_cv_size_t_mangling=u6uint20],
4850 [glibcxx_cv_size_t_mangling=x])
4856 if test $glibcxx_cv_size_t_mangling = x; then
4857 AC_MSG_ERROR([Unknown underlying type for size_t])
4859 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4860 [Define to the letter to which size_t is mangled.])
4864 dnl Determine whether std::exception_ptr symbols should be exported with
4865 dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which
4866 dnl release first added support for std::exception_ptr. Originally it was
4867 dnl only supported for targets with always-lock-free atomics for int, but
4868 dnl since GCC 7.1 it is supported for all targets.
4870 AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [
4871 if test $enable_symvers != no; then
4872 AC_MSG_CHECKING([for first version to support std::exception_ptr])
4874 aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \
4875 m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* )
4876 ac_exception_ptr_since_gcc46=yes
4879 # If the value of this macro changes then we will need to hardcode
4880 # yes/no here for additional targets based on the original value.
4881 AC_TRY_COMPILE([], [
4882 #if __GCC_ATOMIC_INT_LOCK_FREE <= 1
4883 # error atomic int not always lock free
4886 [ac_exception_ptr_since_gcc46=yes],
4887 [ac_exception_ptr_since_gcc46=no])
4890 if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then
4891 AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1,
4892 [Define to 1 if GCC 4.6 supported std::exception_ptr for the target])
4893 AC_MSG_RESULT([4.6.0])
4895 AC_MSG_RESULT([7.1.0])
4900 # Macros from the top-level gcc directory.
4901 m4_include([../config/gc++filt.m4])
4902 m4_include([../config/tls.m4])
4903 m4_include([../config/gthr.m4])
4904 m4_include([../config/cet.m4])