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$ac_has_sleep" = x"nono"; then
1629 AC_MSG_CHECKING([for Sleep])
1630 AC_TRY_COMPILE([#include <windows.h>],
1632 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1633 if test x"$ac_has_win32_sleep" = x"yes"; then
1634 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1636 AC_MSG_RESULT($ac_has_win32_sleep)
1639 AC_SUBST(GLIBCXX_LIBS)
1641 CXXFLAGS="$ac_save_CXXFLAGS"
1642 LIBS="$ac_save_LIBS"
1647 dnl Check for gettimeofday, used in the implementation of 20.11.7
1648 dnl [time.clock] in the C++11 standard.
1650 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1652 AC_MSG_CHECKING([for gettimeofday])
1656 ac_save_CXXFLAGS="$CXXFLAGS"
1657 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1659 ac_has_gettimeofday=no;
1660 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1661 if test x"$ac_has_sys_time_h" = x"yes"; then
1662 AC_MSG_CHECKING([for gettimeofday])
1663 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1664 [timeval tv; gettimeofday(&tv, 0);],
1665 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1667 AC_MSG_RESULT($ac_has_gettimeofday)
1670 if test x"$ac_has_gettimeofday" = x"yes"; then
1671 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1672 [ Defined if gettimeofday is available. ])
1675 CXXFLAGS="$ac_save_CXXFLAGS"
1680 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1681 dnl facilities in Chapter 8, "C compatibility".
1683 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1688 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1689 # undefined and fake C99 facilities may be spuriously enabled.
1690 ac_save_CXXFLAGS="$CXXFLAGS"
1691 CXXFLAGS="$CXXFLAGS -std=c++98"
1693 # Check for the existence of <complex.h> complex math functions used
1695 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1696 ac_c99_complex_tr1=no;
1697 if test x"$ac_has_complex_h" = x"yes"; then
1698 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1699 AC_TRY_COMPILE([#include <complex.h>],
1700 [typedef __complex__ float float_type; float_type tmpf;
1707 typedef __complex__ double double_type; double_type tmpd;
1714 typedef __complex__ long double ld_type; ld_type tmpld;
1721 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1723 AC_MSG_RESULT($ac_c99_complex_tr1)
1724 if test x"$ac_c99_complex_tr1" = x"yes"; then
1725 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1726 [Define if C99 functions in <complex.h> should be used in
1727 <tr1/complex>. Using compiler builtins for these functions
1728 requires corresponding C99 library functions to be present.])
1731 # Check for the existence of <ctype.h> functions.
1732 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1733 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1734 AC_TRY_COMPILE([#include <ctype.h>],
1738 ],[glibcxx_cv_c99_ctype_tr1=yes],
1739 [glibcxx_cv_c99_ctype_tr1=no])
1741 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1742 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1743 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1744 [Define if C99 functions in <ctype.h> should be imported in
1745 <tr1/cctype> in namespace std::tr1.])
1748 # Check for the existence of <fenv.h> functions.
1749 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1751 if test x"$ac_has_fenv_h" = x"yes"; then
1752 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1753 AC_TRY_COMPILE([#include <fenv.h>],
1758 ret = feclearexcept(except);
1759 ret = fegetexceptflag(pflag, except);
1760 ret = feraiseexcept(except);
1761 ret = fesetexceptflag(pflag, except);
1762 ret = fetestexcept(except);
1764 ret = fesetround(mode);
1765 ret = fegetenv(penv);
1766 ret = feholdexcept(penv);
1767 ret = fesetenv(penv);
1768 ret = feupdateenv(penv);
1769 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1771 AC_MSG_RESULT($ac_c99_fenv_tr1)
1772 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1773 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1774 [Define if C99 functions in <fenv.h> should be imported in
1775 <tr1/cfenv> in namespace std::tr1.])
1778 # Check for the existence of <stdint.h> types.
1779 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1780 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1781 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1782 #define __STDC_CONSTANT_MACROS
1783 #include <stdint.h>],
1784 [typedef int8_t my_int8_t;
1785 my_int8_t i8 = INT8_MIN;
1787 typedef int16_t my_int16_t;
1788 my_int16_t i16 = INT16_MIN;
1790 typedef int32_t my_int32_t;
1791 my_int32_t i32 = INT32_MIN;
1793 typedef int64_t my_int64_t;
1794 my_int64_t i64 = INT64_MIN;
1796 typedef int_fast8_t my_int_fast8_t;
1797 my_int_fast8_t if8 = INT_FAST8_MIN;
1798 if8 = INT_FAST8_MAX;
1799 typedef int_fast16_t my_int_fast16_t;
1800 my_int_fast16_t if16 = INT_FAST16_MIN;
1801 if16 = INT_FAST16_MAX;
1802 typedef int_fast32_t my_int_fast32_t;
1803 my_int_fast32_t if32 = INT_FAST32_MIN;
1804 if32 = INT_FAST32_MAX;
1805 typedef int_fast64_t my_int_fast64_t;
1806 my_int_fast64_t if64 = INT_FAST64_MIN;
1807 if64 = INT_FAST64_MAX;
1808 typedef int_least8_t my_int_least8_t;
1809 my_int_least8_t il8 = INT_LEAST8_MIN;
1810 il8 = INT_LEAST8_MAX;
1811 typedef int_least16_t my_int_least16_t;
1812 my_int_least16_t il16 = INT_LEAST16_MIN;
1813 il16 = INT_LEAST16_MAX;
1814 typedef int_least32_t my_int_least32_t;
1815 my_int_least32_t il32 = INT_LEAST32_MIN;
1816 il32 = INT_LEAST32_MAX;
1817 typedef int_least64_t my_int_least64_t;
1818 my_int_least64_t il64 = INT_LEAST64_MIN;
1819 il64 = INT_LEAST64_MAX;
1820 typedef intmax_t my_intmax_t;
1821 my_intmax_t im = INTMAX_MAX;
1823 typedef intptr_t my_intptr_t;
1824 my_intptr_t ip = INTPTR_MAX;
1826 typedef uint8_t my_uint8_t;
1827 my_uint8_t ui8 = UINT8_MAX;
1829 typedef uint16_t my_uint16_t;
1830 my_uint16_t ui16 = UINT16_MAX;
1832 typedef uint32_t my_uint32_t;
1833 my_uint32_t ui32 = UINT32_MAX;
1835 typedef uint64_t my_uint64_t;
1836 my_uint64_t ui64 = UINT64_MAX;
1838 typedef uint_fast8_t my_uint_fast8_t;
1839 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1840 uif8 = UINT_FAST8_MAX;
1841 typedef uint_fast16_t my_uint_fast16_t;
1842 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1843 uif16 = UINT_FAST16_MAX;
1844 typedef uint_fast32_t my_uint_fast32_t;
1845 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1846 uif32 = UINT_FAST32_MAX;
1847 typedef uint_fast64_t my_uint_fast64_t;
1848 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1849 uif64 = UINT_FAST64_MAX;
1850 typedef uint_least8_t my_uint_least8_t;
1851 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1852 uil8 = UINT_LEAST8_MAX;
1853 typedef uint_least16_t my_uint_least16_t;
1854 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1855 uil16 = UINT_LEAST16_MAX;
1856 typedef uint_least32_t my_uint_least32_t;
1857 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1858 uil32 = UINT_LEAST32_MAX;
1859 typedef uint_least64_t my_uint_least64_t;
1860 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1861 uil64 = UINT_LEAST64_MAX;
1862 typedef uintmax_t my_uintmax_t;
1863 my_uintmax_t uim = UINTMAX_MAX;
1865 typedef uintptr_t my_uintptr_t;
1866 my_uintptr_t uip = UINTPTR_MAX;
1868 ],[glibcxx_cv_c99_stdint_tr1=yes],
1869 [glibcxx_cv_c99_stdint_tr1=no])
1871 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1872 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1873 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1874 [Define if C99 types in <stdint.h> should be imported in
1875 <tr1/cstdint> in namespace std::tr1.])
1878 # Check for the existence of <math.h> functions.
1879 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1880 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1881 AC_TRY_COMPILE([#include <math.h>],
1882 [typedef double_t my_double_t;
1883 typedef float_t my_float_t;
1897 copysignf(0.0f, 0.0f);
1898 copysignl(0.0l, 0.0l);
1915 fmaf(0.0f, 0.0f, 0.0f);
1916 fmal(0.0l, 0.0l, 0.0l);
1932 #ifndef __APPLE__ /* see below */
1961 nextafter(0.0, 0.0);
1962 nextafterf(0.0f, 0.0f);
1963 nextafterl(0.0l, 0.0l);
1964 nexttoward(0.0, 0.0);
1965 nexttowardf(0.0f, 0.0f);
1966 nexttowardl(0.0l, 0.0l);
1967 remainder(0.0, 0.0);
1968 remainderf(0.0f, 0.0f);
1969 remainderl(0.0l, 0.0l);
1970 remquo(0.0, 0.0, 0);
1971 remquof(0.0f, 0.0f, 0);
1972 remquol(0.0l, 0.0l, 0);
1991 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1993 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1994 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1995 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1996 [Define if C99 functions or macros in <math.h> should be imported
1997 in <tr1/cmath> in namespace std::tr1.])
1999 case "${target_os}" in
2001 AC_MSG_CHECKING([for ISO C99 rounding functions in <math.h>])
2002 AC_CACHE_VAL(glibcxx_cv_c99_math_llround, [
2003 AC_TRY_COMPILE([#include <math.h>],
2011 [glibcxx_cv_c99_math_llround=yes],
2012 [glibcxx_cv_c99_math_llround=no])
2014 AC_MSG_RESULT($glibcxx_cv_c99_math_llround)
2017 if test x"$glibcxx_cv_c99_math_llround" = x"no"; then
2018 AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1,
2019 [Define if C99 llrint and llround functions are missing from <math.h>.])
2023 # Check for the existence of <inttypes.h> functions (NB: doesn't make
2024 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
2025 ac_c99_inttypes_tr1=no;
2026 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2027 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
2028 AC_TRY_COMPILE([#include <inttypes.h>],
2029 [intmax_t i, numer, denom, base;
2032 intmax_t ret = imaxabs(i);
2033 imaxdiv_t dret = imaxdiv(numer, denom);
2034 ret = strtoimax(s, endptr, base);
2035 uintmax_t uret = strtoumax(s, endptr, base);
2036 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
2038 AC_MSG_RESULT($ac_c99_inttypes_tr1)
2039 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
2040 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
2041 [Define if C99 functions in <inttypes.h> should be imported in
2042 <tr1/cinttypes> in namespace std::tr1.])
2045 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
2046 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
2047 ac_c99_inttypes_wchar_t_tr1=no;
2048 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2049 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
2050 AC_TRY_COMPILE([#include <inttypes.h>],
2054 intmax_t ret = wcstoimax(s, endptr, base);
2055 uintmax_t uret = wcstoumax(s, endptr, base);
2056 ],[ac_c99_inttypes_wchar_t_tr1=yes],
2057 [ac_c99_inttypes_wchar_t_tr1=no])
2059 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
2060 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
2061 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
2062 [Define if wchar_t C99 functions in <inttypes.h> should be
2063 imported in <tr1/cinttypes> in namespace std::tr1.])
2066 # Check for the existence of the <stdbool.h> header.
2067 AC_CHECK_HEADERS(stdbool.h)
2069 # Check for the existence of the <stdalign.h> header.
2070 AC_CHECK_HEADERS(stdalign.h)
2072 CXXFLAGS="$ac_save_CXXFLAGS"
2077 dnl Check for uchar.h and usability.
2079 AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2082 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2086 ac_save_CXXFLAGS="$CXXFLAGS"
2087 CXXFLAGS="$CXXFLAGS -std=c++11"
2089 if test x"$ac_has_uchar_h" = x"yes"; then
2090 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2091 AC_TRY_COMPILE([#include <uchar.h>
2092 #ifdef __STDC_UTF_16__
2093 long i = __STDC_UTF_16__;
2095 #ifdef __STDC_UTF_32__
2096 long j = __STDC_UTF_32__;
2106 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2108 ac_c11_uchar_cxx11=no
2110 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2111 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2112 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2113 [Define if C11 functions in <uchar.h> should be imported into
2114 namespace std in <cuchar>.])
2117 CXXFLAGS="$ac_save_CXXFLAGS"
2123 dnl Check whether "/dev/random" and "/dev/urandom" are available for
2124 dnl class std::random_device from C++ 2011 [rand.device], and
2125 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2127 AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [
2129 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for std::random_device])
2130 AC_CACHE_VAL(glibcxx_cv_dev_random, [
2131 if test -r /dev/random && test -r /dev/urandom; then
2132 ## For MSys environment the test above is detected as false-positive
2133 ## on mingw-targets. So disable it explicitly for them.
2134 case ${target_os} in
2135 *mingw*) glibcxx_cv_dev_random=no ;;
2136 *) glibcxx_cv_dev_random=yes ;;
2139 glibcxx_cv_dev_random=no;
2142 AC_MSG_RESULT($glibcxx_cv_dev_random)
2144 if test x"$glibcxx_cv_dev_random" = x"yes"; then
2145 AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1,
2146 [Define if /dev/random and /dev/urandom are available for
2147 std::random_device.])
2148 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
2149 [Define if /dev/random and /dev/urandom are available for
2150 the random_device of TR1 (Chapter 5.1).])
2156 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2158 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2160 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
2161 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
2162 [#include <stdio.h>],
2163 [AC_MSG_ERROR([computing EOF failed])])
2165 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
2166 [Define to the value of the EOF integer constant.])
2168 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
2169 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
2170 [#include <stdio.h>],
2171 [AC_MSG_ERROR([computing SEEK_CUR failed])])
2173 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
2174 [Define to the value of the SEEK_CUR integer constant.])
2176 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
2177 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
2178 [#include <stdio.h>],
2179 [AC_MSG_ERROR([computing SEEK_END failed])])
2181 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
2182 [Define to the value of the SEEK_END integer constant.])
2186 dnl Check whether required C++ overloads are present in <stdio.h>.
2188 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2192 # Use C++11 because a conforming <stdio.h> won't define gets for C++14,
2193 # and we don't need a declaration for C++14 anyway.
2194 ac_save_CXXFLAGS="$CXXFLAGS"
2195 CXXFLAGS="$CXXFLAGS -std=gnu++11"
2197 AC_MSG_CHECKING([for gets declaration])
2198 AC_CACHE_VAL(glibcxx_cv_gets, [
2199 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2206 [glibcxx_cv_gets=yes],
2207 [glibcxx_cv_gets=no]
2210 if test $glibcxx_cv_gets = yes; then
2211 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.])
2213 AC_MSG_RESULT($glibcxx_cv_gets)
2215 CXXFLAGS="$ac_save_CXXFLAGS"
2220 dnl Check whether required C++11 overloads for floating point and integral
2221 dnl types are present in <math.h>.
2223 AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2227 ac_save_CXXFLAGS="$CXXFLAGS"
2228 CXXFLAGS="$CXXFLAGS -std=c++11"
2232 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch
2233 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads.
2234 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads])
2235 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [
2236 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2240 inline bool isfinite(float __x)
2241 { return __builtin_isfinite(__x); }
2244 [glibcxx_cv_math11_fp_overload=no],
2245 [glibcxx_cv_math11_fp_overload=yes]
2248 # autoheader cannot handle indented templates.
2249 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP],
2250 [/* Define if all C++11 floating point overloads are available in <math.h>. */
2251 #if __cplusplus >= 201103L
2252 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
2255 if test $glibcxx_cv_math11_fp_overload = yes; then
2256 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP)
2258 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload])
2260 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch
2261 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads.
2262 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads])
2263 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [
2264 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2267 template<typename _Tp>
2268 struct __is_integer;
2270 struct __is_integer<int>
2272 enum { __value = 1 };
2275 namespace __gnu_cxx {
2276 template<bool, typename>
2278 template<typename _Tp>
2279 struct __enable_if<true, _Tp>
2280 { typedef _Tp __type; };
2283 template<typename _Tp>
2284 constexpr typename __gnu_cxx::__enable_if
2285 <__is_integer<_Tp>::__value, double>::__type
2287 { return __builtin_log2(__x); }
2293 return std::log2(i);
2296 [glibcxx_cv_math11_int_overload=no],
2297 [glibcxx_cv_math11_int_overload=yes]
2300 # autoheader cannot handle indented templates.
2301 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT],
2302 [/* Define if all C++11 integral type overloads are available in <math.h>. */
2303 #if __cplusplus >= 201103L
2304 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT
2307 if test $glibcxx_cv_math11_int_overload = yes; then
2308 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT)
2310 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload])
2313 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2314 # functions (instead of or as well as the C99 generic macros) then we
2315 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2316 # and must use the ones from <math.h> instead.
2317 AC_MSG_CHECKING([for obsolete isinf function in <math.h>])
2318 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [
2319 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2320 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2326 bool isinf(long double);
2329 bool b = isinf(0.0);
2331 [glibcxx_cv_obsolete_isinf=yes],
2332 [glibcxx_cv_obsolete_isinf=no]
2334 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf])
2335 if test $glibcxx_cv_obsolete_isinf = yes; then
2336 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
2337 [Define if <math.h> defines obsolete isinf function.])
2340 AC_MSG_CHECKING([for obsolete isnan function in <math.h>])
2341 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [
2342 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2343 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2349 bool isnan(long double);
2352 bool b = isnan(0.0);
2354 [glibcxx_cv_obsolete_isnan=yes],
2355 [glibcxx_cv_obsolete_isnan=no]
2357 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan])
2358 if test $glibcxx_cv_obsolete_isnan = yes; then
2359 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
2360 [Define if <math.h> defines obsolete isnan function.])
2365 CXXFLAGS="$ac_save_CXXFLAGS"
2370 dnl Check whether macros, etc are present for <system_error>
2372 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2374 m4_pushdef([n_syserr], [1])dnl
2375 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
2376 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
2377 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2378 ECHILD, ENOSPC, EPERM,
2379 ETIMEDOUT, EWOULDBLOCK],
2380 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2381 AC_MSG_CHECKING([for syserr])
2382 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2383 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2384 [int i = syserr;])],
2385 [glibcxx_cv_system_error[]n_syserr=yes],
2386 [glibcxx_cv_system_error[]n_syserr=no])
2388 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2389 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2390 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2392 m4_define([n_syserr], m4_incr(n_syserr))dnl
2393 m4_popdef([SYSERR])dnl
2395 m4_popdef([n_syserr])dnl
2399 dnl Check for what type of C headers to use.
2401 dnl --enable-cheaders= [does stuff].
2402 dnl --disable-cheaders [does not do anything, really].
2403 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2404 dnl Where DEFAULT is either 'c' or 'c_global' or 'c_std'.
2406 dnl To use the obsolete 'c_std' headers use --enable-cheaders-obsolete as
2407 dnl well as --enable-cheaders=c_std, otherwise configure will fail.
2409 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2410 GLIBCXX_ENABLE(cheaders-obsolete,no,,
2411 [allow use of obsolete "C" headers for g++])
2412 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2413 [construct "C" headers for g++], [permit c|c_global|c_std])
2414 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2415 if test $enable_cheaders = c_std ; then
2416 AC_MSG_WARN([the --enable-cheaders=c_std configuration is obsolete, c_global should be used instead])
2417 AC_MSG_WARN([if you are unable to use c_global please report a bug or inform libstdc++@gcc.gnu.org])
2418 if test $enable_cheaders_obsolete != yes ; then
2419 AC_MSG_ERROR(use --enable-cheaders-obsolete to use c_std "C" headers)
2423 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2425 # Allow overrides to configure.host here.
2426 if test $enable_cheaders = c_global; then
2430 AC_SUBST(C_INCLUDE_DIR)
2431 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2432 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2433 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2434 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2439 dnl Check for which locale library to use. The choice is mapped to
2440 dnl a subdirectory of config/locale.
2442 dnl Default is generic.
2444 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2445 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2446 [use MODEL for target locale package],
2447 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2449 # Deal with gettext issues. Default to not using it (=no) until we detect
2450 # support for it later. Let the user turn it off via --e/d, but let that
2451 # default to on for easier handling.
2454 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2458 # Either a known package, or "auto"
2459 if test $enable_clocale = no || test $enable_clocale = yes; then
2462 enable_clocale_flag=$enable_clocale
2464 # Probe for locale model to use if none specified.
2465 # Default to "generic".
2466 if test $enable_clocale_flag = auto; then
2467 case ${target_os} in
2468 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2469 enable_clocale_flag=gnu
2472 enable_clocale_flag=darwin
2474 dragonfly* | freebsd*)
2475 enable_clocale_flag=dragonfly
2478 enable_clocale_flag=newlib
2481 if test x"$with_newlib" = x"yes"; then
2482 enable_clocale_flag=newlib
2484 enable_clocale_flag=generic
2490 # Sanity check model, and test for special functionality.
2491 if test $enable_clocale_flag = gnu; then
2492 AC_EGREP_CPP([_GLIBCXX_ok], [
2493 #include <features.h>
2494 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2497 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2499 # Set it to scream when it hurts.
2500 ac_save_CFLAGS="$CFLAGS"
2501 CFLAGS="-Wimplicit-function-declaration -Werror"
2503 # Use strxfrm_l if available.
2504 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2506 #include <locale.h>],
2507 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2508 AC_DEFINE(HAVE_STRXFRM_L, 1,
2509 [Define if strxfrm_l is available in <string.h>.]),)
2511 # Use strerror_l if available.
2512 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2514 #include <locale.h>],
2515 [__locale_t loc; strerror_l(5, loc);],
2516 AC_DEFINE(HAVE_STRERROR_L, 1,
2517 [Define if strerror_l is available in <string.h>.]),)
2519 CFLAGS="$ac_save_CFLAGS"
2522 # Perhaps use strerror_r if available, and strerror_l isn't.
2523 ac_save_CFLAGS="$CFLAGS"
2524 CFLAGS="-Wimplicit-function-declaration -Werror"
2525 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2527 #include <locale.h>],
2528 [char s[128]; strerror_r(5, s, 128);],
2529 AC_DEFINE(HAVE_STRERROR_R, 1,
2530 [Define if strerror_r is available in <string.h>.]),)
2531 CFLAGS="$ac_save_CFLAGS"
2533 # Set configure bits for specified locale package
2534 AC_MSG_CHECKING([for C locale to use])
2535 case ${enable_clocale_flag} in
2537 AC_MSG_RESULT(generic)
2539 CLOCALE_H=config/locale/generic/c_locale.h
2540 CLOCALE_CC=config/locale/generic/c_locale.cc
2541 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2542 CCOLLATE_CC=config/locale/generic/collate_members.cc
2543 CCTYPE_CC=config/locale/generic/ctype_members.cc
2544 CMESSAGES_H=config/locale/generic/messages_members.h
2545 CMESSAGES_CC=config/locale/generic/messages_members.cc
2546 CMONEY_CC=config/locale/generic/monetary_members.cc
2547 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2548 CTIME_H=config/locale/generic/time_members.h
2549 CTIME_CC=config/locale/generic/time_members.cc
2550 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2553 AC_MSG_RESULT(darwin)
2555 CLOCALE_H=config/locale/generic/c_locale.h
2556 CLOCALE_CC=config/locale/generic/c_locale.cc
2557 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2558 CCOLLATE_CC=config/locale/generic/collate_members.cc
2559 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2560 CMESSAGES_H=config/locale/generic/messages_members.h
2561 CMESSAGES_CC=config/locale/generic/messages_members.cc
2562 CMONEY_CC=config/locale/generic/monetary_members.cc
2563 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2564 CTIME_H=config/locale/generic/time_members.h
2565 CTIME_CC=config/locale/generic/time_members.cc
2566 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2570 AC_MSG_RESULT(dragonfly or freebsd)
2572 CLOCALE_H=config/locale/dragonfly/c_locale.h
2573 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2574 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2575 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2576 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2577 CMESSAGES_H=config/locale/generic/messages_members.h
2578 CMESSAGES_CC=config/locale/generic/messages_members.cc
2579 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2580 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2581 CTIME_H=config/locale/dragonfly/time_members.h
2582 CTIME_CC=config/locale/dragonfly/time_members.cc
2583 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2589 # Declare intention to use gettext, and add support for specific
2591 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2594 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2595 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2596 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2599 # Export the build objects.
2600 for ling in $ALL_LINGUAS; do \
2601 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2602 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2604 AC_SUBST(glibcxx_MOFILES)
2605 AC_SUBST(glibcxx_POFILES)
2607 CLOCALE_H=config/locale/gnu/c_locale.h
2608 CLOCALE_CC=config/locale/gnu/c_locale.cc
2609 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2610 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2611 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2612 CMESSAGES_H=config/locale/gnu/messages_members.h
2613 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2614 CMONEY_CC=config/locale/gnu/monetary_members.cc
2615 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2616 CTIME_H=config/locale/gnu/time_members.h
2617 CTIME_CC=config/locale/gnu/time_members.cc
2618 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2621 AC_MSG_RESULT(IEEE 1003.1)
2623 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2624 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2625 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2626 CCOLLATE_CC=config/locale/generic/collate_members.cc
2627 CCTYPE_CC=config/locale/generic/ctype_members.cc
2628 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2629 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2630 CMONEY_CC=config/locale/generic/monetary_members.cc
2631 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2632 CTIME_H=config/locale/generic/time_members.h
2633 CTIME_CC=config/locale/generic/time_members.cc
2634 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2637 AC_MSG_RESULT(newlib)
2639 CLOCALE_H=config/locale/generic/c_locale.h
2640 CLOCALE_CC=config/locale/generic/c_locale.cc
2641 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2642 CCOLLATE_CC=config/locale/generic/collate_members.cc
2643 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2644 CMESSAGES_H=config/locale/generic/messages_members.h
2645 CMESSAGES_CC=config/locale/generic/messages_members.cc
2646 CMONEY_CC=config/locale/generic/monetary_members.cc
2647 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2648 CTIME_H=config/locale/generic/time_members.h
2649 CTIME_CC=config/locale/generic/time_members.cc
2650 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2654 # This is where the testsuite looks for locale catalogs, using the
2655 # -DLOCALEDIR define during testsuite compilation.
2656 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2657 AC_SUBST(glibcxx_localedir)
2659 # A standalone libintl (e.g., GNU libintl) may be in use.
2660 if test $USE_NLS = yes; then
2661 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2662 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2664 if test $USE_NLS = yes; then
2665 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2666 [Define if NLS translations are to be used.])
2671 AC_SUBST(CMESSAGES_H)
2672 AC_SUBST(CCODECVT_CC)
2673 AC_SUBST(CCOLLATE_CC)
2675 AC_SUBST(CMESSAGES_CC)
2677 AC_SUBST(CNUMERIC_CC)
2680 AC_SUBST(CLOCALE_CC)
2681 AC_SUBST(CLOCALE_INTERNAL_H)
2686 dnl Check for which std::allocator base class to use. The choice is
2687 dnl mapped from a subdirectory of include/ext.
2691 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2692 AC_MSG_CHECKING([for std::allocator base class])
2693 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2694 [use KIND for target std::allocator base],
2695 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2697 # If they didn't use this option switch, or if they specified --enable
2698 # with no specific model, we'll have to look for one. If they
2699 # specified --disable (???), do likewise.
2700 if test $enable_libstdcxx_allocator = no ||
2701 test $enable_libstdcxx_allocator = yes;
2703 enable_libstdcxx_allocator=auto
2706 # Either a known package, or "auto". Auto implies the default choice
2707 # for a particular platform.
2708 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2710 # Probe for host-specific support if no specific model is specified.
2712 if test $enable_libstdcxx_allocator_flag = auto; then
2713 case ${target_os} in
2714 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2715 enable_libstdcxx_allocator_flag=new
2718 enable_libstdcxx_allocator_flag=new
2722 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2725 # Set configure bits for specified locale package
2726 case ${enable_libstdcxx_allocator_flag} in
2728 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2729 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2732 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2733 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2736 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2737 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2740 ALLOCATOR_H=config/allocator/new_allocator_base.h
2741 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2744 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2745 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2749 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2750 test $enable_libstdcxx_allocator_flag = new)
2751 AC_SUBST(ALLOCATOR_H)
2752 AC_SUBST(ALLOCATOR_NAME)
2757 dnl Check for whether the Boost-derived checks should be turned on.
2759 dnl --enable-concept-checks turns them on.
2760 dnl --disable-concept-checks leaves them off.
2761 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2762 dnl Where DEFAULT is either `yes' or `no'.
2764 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2765 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2766 if test $enable_concept_checks = yes; then
2767 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2768 [Define to use concept checking code from the boost libraries.])
2773 dnl Use extern templates.
2775 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2776 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2778 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2779 dnl Where DEFAULT is `yes' or `no'.
2781 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2783 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2785 AC_MSG_CHECKING([for extern template support])
2786 AC_MSG_RESULT([$enable_extern_template])
2788 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2792 dnl Use vtable verification.
2794 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2795 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2797 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2798 dnl Where DEFAULT is `yes' or `no'.
2800 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2802 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2804 AC_MSG_CHECKING([for vtable verify support])
2805 AC_MSG_RESULT([$enable_vtable_verify])
2808 if test $enable_vtable_verify = yes; then
2809 case ${target_os} in
2811 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2812 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2816 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2817 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2820 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2821 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2824 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2825 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2828 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2835 AC_SUBST(VTV_CXXFLAGS)
2836 AC_SUBST(VTV_PCH_CXXFLAGS)
2837 AC_SUBST(VTV_CXXLINKFLAGS)
2838 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2839 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2843 dnl Check for parallel mode pre-requisites, including OpenMP support.
2845 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2847 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2851 # See if configured libgomp/omp.h exists. (libgomp may be in
2852 # noconfigdirs but not explicitly disabled.)
2853 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2854 enable_parallel=yes;
2856 AC_MSG_NOTICE([target-libgomp not built])
2859 AC_MSG_CHECKING([for parallel mode support])
2860 AC_MSG_RESULT([$enable_parallel])
2865 dnl Check for which I/O library to use: stdio, or something specific.
2867 dnl Default is stdio.
2869 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2870 AC_MSG_CHECKING([for underlying I/O to use])
2871 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2872 [use target-specific I/O package], [permit stdio])
2874 # Now that libio has been removed, you can have any color you want as long
2875 # as it's black. This is one big no-op until other packages are added, but
2876 # showing the framework never hurts.
2877 case ${enable_cstdio} in
2879 CSTDIO_H=config/io/c_io_stdio.h
2880 BASIC_FILE_H=config/io/basic_file_stdio.h
2881 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2882 AC_MSG_RESULT(stdio)
2887 AC_SUBST(BASIC_FILE_H)
2888 AC_SUBST(BASIC_FILE_CC)
2893 dnl Check for "unusual" flags to pass to the compiler while building.
2895 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2896 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2897 dnl --disable-cxx-flags passes nothing.
2898 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2899 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2900 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2901 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2902 dnl If "default flags" is an empty string, the effect is the same
2903 dnl as --disable or --enable=no.
2905 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2906 AC_MSG_CHECKING([for extra compiler flags for building])
2907 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2908 [pass compiler FLAGS when building library],
2909 [case "x$enable_cxx_flags" in
2910 xno | x) enable_cxx_flags= ;;
2912 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2915 # Run through flags (either default or command-line) and set anything
2916 # extra (e.g., #defines) that must accompany particular g++ options.
2917 if test -n "$enable_cxx_flags"; then
2918 for f in $enable_cxx_flags; do
2922 *) # and we're trying to pass /what/ exactly?
2923 AC_MSG_ERROR([compiler flags start with a -]) ;;
2928 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2929 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2930 AC_SUBST(EXTRA_CXX_FLAGS)
2935 dnl Check to see if debugging libraries are to be built.
2937 dnl --enable-libstdcxx-debug
2938 dnl builds a separate set of debugging libraries in addition to the
2939 dnl normal (shared, static) libstdc++ binaries.
2941 dnl --disable-libstdcxx-debug
2942 dnl builds only one (non-debug) version of libstdc++.
2944 dnl --enable-libstdcxx-debug-flags=FLAGS
2945 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2947 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2948 dnl Where DEFAULT is either `yes' or `no'.
2950 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2951 AC_MSG_CHECKING([for additional debug build])
2953 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2954 if test x$enable_libstdcxx_debug = xyes; then
2955 if test -f $toplevel_builddir/../stage_final \
2956 && test -f $toplevel_builddir/../stage_current; then
2957 stage_final=`cat $toplevel_builddir/../stage_final`
2958 stage_current=`cat $toplevel_builddir/../stage_current`
2959 if test x$stage_current != x$stage_final ; then
2960 skip_debug_build=" (skipped for bootstrap stage $stage_current)"
2961 enable_libstdcxx_debug=no
2965 AC_MSG_RESULT($enable_libstdcxx_debug$skip_debug_build)
2966 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2971 dnl Check for explicit debug flags.
2973 dnl --enable-libstdcxx-debug-flags='-O1'
2974 dnl is a general method for passing flags to be used when
2975 dnl building debug libraries with --enable-libstdcxx-debug.
2977 dnl --disable-libstdcxx-debug-flags does nothing.
2978 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2979 dnl If "default flags" is an empty string, the effect is the same
2980 dnl as --disable or --enable=no.
2982 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2983 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2984 [pass compiler FLAGS when building debug library],
2985 [case "x$enable_libstdcxx_debug_flags" in
2986 xno | x) enable_libstdcxx_debug_flags= ;;
2988 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2991 # Option parsed, now set things appropriately
2992 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2993 AC_SUBST(DEBUG_FLAGS)
2995 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
3000 dnl Check if the user only wants a freestanding library implementation.
3002 dnl --disable-hosted-libstdcxx will turn off most of the library build,
3003 dnl installing only the headers required by [17.4.1.3] and the language
3004 dnl support library. More than that will be built (to keep the Makefiles
3005 dnl conveniently clean), but not installed.
3008 dnl is_hosted (yes/no)
3011 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
3013 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
3014 AC_ARG_ENABLE([hosted-libstdcxx],
3015 AC_HELP_STRING([--disable-hosted-libstdcxx],
3016 [only build freestanding C++ runtime support]),,
3019 enable_hosted_libstdcxx=no
3022 enable_hosted_libstdcxx=yes
3025 if test "$enable_hosted_libstdcxx" = no; then
3026 AC_MSG_NOTICE([Only freestanding libraries will be built])
3030 enable_libstdcxx_pch=no
3035 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
3036 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
3037 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
3042 dnl Check if the user wants a non-verbose library implementation.
3044 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
3045 dnl standard error on termination.
3048 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
3050 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
3051 AC_ARG_ENABLE([libstdcxx-verbose],
3052 AC_HELP_STRING([--disable-libstdcxx-verbose],
3053 [disable termination messages to standard error]),,
3054 [enable_libstdcxx_verbose=yes])
3055 if test x"$enable_libstdcxx_verbose" = xyes; then
3058 AC_MSG_NOTICE([verbose termination messages are disabled])
3061 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
3062 [Define to 1 if a verbose library is built, or 0 otherwise.])
3067 dnl Check for template specializations for the 'long long' type.
3068 dnl The result determines only whether 'long long' I/O is enabled; things
3069 dnl like numeric_limits<> specializations are always available.
3071 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
3072 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
3073 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
3074 dnl Where DEFAULT is either `yes' or `no'.
3076 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
3077 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
3078 if test $enable_long_long = yes; then
3079 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
3080 [Define if code specialized for long long should be used.])
3082 AC_MSG_CHECKING([for enabled long long specializations])
3083 AC_MSG_RESULT([$enable_long_long])
3088 dnl Check for decimal floating point.
3090 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
3092 dnl This checks to see if the host supports decimal floating point types.
3095 dnl _GLIBCXX_USE_DECIMAL_FLOAT
3097 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
3099 # Fake what AC_TRY_COMPILE does, without linking as this is
3100 # unnecessary for this test.
3102 cat > conftest.$ac_ext << EOF
3103 [#]line __oline__ "configure"
3113 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
3114 if AC_TRY_EVAL(ac_compile); then
3115 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
3116 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
3121 AC_MSG_RESULT($enable_dfp)
3126 dnl Check for GNU 128-bit integer and floating point types.
3128 dnl Note: also checks that the types aren't standard types.
3131 dnl _GLIBCXX_USE_INT128
3134 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
3139 # Fake what AC_TRY_COMPILE does, without linking as this is
3140 # unnecessary for this test.
3142 cat > conftest.$ac_ext << EOF
3143 [#]line __oline__ "configure"
3144 template<typename T1, typename T2>
3146 { typedef T2 type; };
3148 template<typename T>
3153 typename same<long, __int128>::type i1;
3154 typename same<long long, __int128>::type i2;
3158 AC_MSG_CHECKING([for __int128])
3159 if AC_TRY_EVAL(ac_compile); then
3160 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
3161 [Define if __int128 is supported on this host.])
3166 AC_MSG_RESULT($enable_int128)
3169 cat > conftest.$ac_ext << EOF
3170 [#]line __oline__ "configure"
3171 template<typename T1, typename T2>
3173 { typedef T2 type; };
3175 template<typename T>
3180 typename same<double, __float128>::type f1;
3181 typename same<long double, __float128>::type f2;
3185 AC_MSG_CHECKING([for __float128])
3186 if AC_TRY_EVAL(ac_compile); then
3191 AC_MSG_RESULT($enable_float128)
3192 GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes)
3199 dnl Check for template specializations for the 'wchar_t' type.
3201 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3202 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3203 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3204 dnl Where DEFAULT is either `yes' or `no'.
3206 dnl Necessary support must also be present.
3208 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3209 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3211 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3212 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3213 AC_MSG_CHECKING([for mbstate_t])
3214 AC_TRY_COMPILE([#include <wchar.h>],
3215 [mbstate_t teststate;],
3216 have_mbstate_t=yes, have_mbstate_t=no)
3217 AC_MSG_RESULT($have_mbstate_t)
3218 if test x"$have_mbstate_t" = xyes; then
3219 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3222 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3224 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3226 if test x"$enable_wchar_t" = x"yes"; then
3231 if test x"$ac_has_wchar_h" = xyes &&
3232 test x"$ac_has_wctype_h" = xyes; then
3233 AC_TRY_COMPILE([#include <wchar.h>
3294 ],[],[], [enable_wchar_t=no])
3302 if test x"$enable_wchar_t" = x"yes"; then
3303 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3304 [Define if code specialized for wchar_t should be used.])
3307 AC_MSG_CHECKING([for enabled wchar_t specializations])
3308 AC_MSG_RESULT([$enable_wchar_t])
3313 dnl Check to see if building and using a C++ precompiled header can be done.
3315 dnl --enable-libstdcxx-pch=yes
3316 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3317 dnl may work, after some light-hearted attempts to puzzle out compiler
3318 dnl support, flip bits on in include/Makefile.am
3320 dnl --disable-libstdcxx-pch
3321 dnl turns off attempts to use or build stdc++.h.gch.
3324 dnl glibcxx_PCHFLAGS
3326 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3327 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3328 if test $enable_libstdcxx_pch = yes; then
3329 AC_CACHE_CHECK([for compiler with PCH support],
3330 [glibcxx_cv_prog_CXX_pch],
3331 [ac_save_CXXFLAGS="$CXXFLAGS"
3332 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3335 echo '#include <math.h>' > conftest.h
3336 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3337 -o conftest.h.gch 1>&5 2>&1 &&
3338 echo '#error "pch failed"' > conftest.h &&
3339 echo '#include "conftest.h"' > conftest.cc &&
3340 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3342 glibcxx_cv_prog_CXX_pch=yes
3344 glibcxx_cv_prog_CXX_pch=no
3347 CXXFLAGS=$ac_save_CXXFLAGS
3350 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3353 AC_MSG_CHECKING([for enabled PCH])
3354 AC_MSG_RESULT([$enable_libstdcxx_pch])
3356 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3357 if test $enable_libstdcxx_pch = yes; then
3358 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3362 AC_SUBST(glibcxx_PCHFLAGS)
3367 dnl Check for atomic builtins.
3369 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3371 dnl This checks to see if the host supports the compiler-generated
3372 dnl builtins for atomic operations for various integral sizes. Note, this
3373 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3374 dnl that are used should be checked.
3377 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3379 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3382 old_CXXFLAGS="$CXXFLAGS"
3384 # Do link tests if possible, instead asm tests, limited to some platforms
3385 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3386 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3387 atomic_builtins_link_tests=no
3388 if test x$gcc_no_link != xyes; then
3389 # Can do link tests. Limit to some tested platforms
3391 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3392 atomic_builtins_link_tests=yes
3397 if test x$atomic_builtins_link_tests = xyes; then
3401 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3403 AC_MSG_CHECKING([for atomic builtins for bool])
3404 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3407 [typedef bool atomic_type;
3411 // N.B. __atomic_fetch_add is not supported for bool.
3412 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3414 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3415 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3417 [glibcxx_cv_atomic_bool=yes],
3418 [glibcxx_cv_atomic_bool=no])
3420 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3422 AC_MSG_CHECKING([for atomic builtins for short])
3423 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3426 [typedef short atomic_type;
3430 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3431 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3433 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3434 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3436 [glibcxx_cv_atomic_short=yes],
3437 [glibcxx_cv_atomic_short=no])
3439 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3441 AC_MSG_CHECKING([for atomic builtins for int])
3442 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3445 [typedef int atomic_type;
3449 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3450 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3452 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3453 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3455 [glibcxx_cv_atomic_int=yes],
3456 [glibcxx_cv_atomic_int=no])
3458 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3460 AC_MSG_CHECKING([for atomic builtins for long long])
3461 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3464 [typedef long long atomic_type;
3468 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3469 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3471 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3472 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3474 [glibcxx_cv_atomic_long_long=yes],
3475 [glibcxx_cv_atomic_long_long=no])
3477 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3483 # Compile unoptimized.
3486 # Fake what AC_TRY_COMPILE does.
3488 cat > conftest.$ac_ext << EOF
3489 [#]line __oline__ "configure"
3492 typedef bool atomic_type;
3496 // N.B. __atomic_fetch_add is not supported for bool.
3497 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3499 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3500 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3506 AC_MSG_CHECKING([for atomic builtins for bool])
3507 if AC_TRY_EVAL(ac_compile); then
3508 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3509 glibcxx_cv_atomic_bool=no
3511 glibcxx_cv_atomic_bool=yes
3514 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3517 cat > conftest.$ac_ext << EOF
3518 [#]line __oline__ "configure"
3521 typedef short atomic_type;
3525 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3526 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3528 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3529 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3535 AC_MSG_CHECKING([for atomic builtins for short])
3536 if AC_TRY_EVAL(ac_compile); then
3537 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3538 glibcxx_cv_atomic_short=no
3540 glibcxx_cv_atomic_short=yes
3543 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3546 cat > conftest.$ac_ext << EOF
3547 [#]line __oline__ "configure"
3550 // NB: _Atomic_word not necessarily int.
3551 typedef int atomic_type;
3555 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3556 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3558 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3559 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3565 AC_MSG_CHECKING([for atomic builtins for int])
3566 if AC_TRY_EVAL(ac_compile); then
3567 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3568 glibcxx_cv_atomic_int=no
3570 glibcxx_cv_atomic_int=yes
3573 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3576 cat > conftest.$ac_ext << EOF
3577 [#]line __oline__ "configure"
3580 typedef long long atomic_type;
3584 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3585 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3587 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3588 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3594 AC_MSG_CHECKING([for atomic builtins for long long])
3595 if AC_TRY_EVAL(ac_compile); then
3596 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3597 glibcxx_cv_atomic_long_long=no
3599 glibcxx_cv_atomic_long_long=yes
3602 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3607 CXXFLAGS="$old_CXXFLAGS"
3610 # Set atomicity_dir to builtins if all but the long long test above passes,
3611 # or if the builtins were already chosen (e.g. by configure.host).
3612 if { test "$glibcxx_cv_atomic_bool" = yes \
3613 && test "$glibcxx_cv_atomic_short" = yes \
3614 && test "$glibcxx_cv_atomic_int" = yes; } \
3615 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
3616 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3617 [Define if the compiler supports C++11 atomics.])
3618 atomicity_dir=cpu/generic/atomicity_builtins
3621 # If still generic, set to mutex.
3622 if test $atomicity_dir = "cpu/generic" ; then
3623 atomicity_dir=cpu/generic/atomicity_mutex
3624 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3625 if test "x$target_thread_file" = xsingle; then
3626 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3627 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3629 AC_MSG_WARN([They will be faked using a mutex.])
3630 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3637 dnl Set default lock policy for synchronizing shared_ptr reference counting.
3639 dnl --with-libstdcxx-lock-policy=auto
3640 dnl Use atomic operations for shared_ptr reference counting only if
3641 dnl the default target supports atomic compare-and-swap.
3642 dnl --with-libstdcxx-lock-policy=atomic
3643 dnl Use atomic operations for shared_ptr reference counting.
3644 dnl --with-libstdcxx-lock-policy=mutex
3645 dnl Use a mutex to synchronize shared_ptr reference counting.
3647 dnl This controls the value of __gnu_cxx::__default_lock_policy, which
3648 dnl determines how shared_ptr reference counts are synchronized.
3649 dnl The option "atomic" means that atomic operations should be used,
3650 dnl "mutex" means that a mutex will be used. The default option, "auto",
3651 dnl will check if the target supports the compiler-generated builtins
3652 dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers,
3653 dnl and will use "atomic" if supported, "mutex" otherwise.
3654 dnl This option is ignored if the thread model used by GCC is "single",
3655 dnl as no synchronization is used at all in that case.
3656 dnl This option affects the library ABI (except in the "single" thread model).
3658 dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used.
3660 AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [
3662 AC_ARG_WITH([libstdcxx-lock-policy],
3663 AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}],
3664 [synchronization policy for shared_ptr reference counting [default=auto]]),
3665 [libstdcxx_atomic_lock_policy=$withval],
3666 [libstdcxx_atomic_lock_policy=auto])
3668 case "$libstdcxx_atomic_lock_policy" in
3669 atomic|mutex|auto) ;;
3670 *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;;
3672 AC_MSG_CHECKING([for lock policy for shared_ptr reference counts])
3674 if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then
3677 ac_save_CXXFLAGS="$CXXFLAGS"
3679 dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?!
3681 #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
3682 # error "No 2-byte compare-and-swap"
3683 #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
3684 # error "No 4-byte compare-and-swap"
3687 [libstdcxx_atomic_lock_policy=atomic],
3688 [libstdcxx_atomic_lock_policy=mutex])
3690 CXXFLAGS="$ac_save_CXXFLAGS"
3693 if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then
3694 AC_MSG_RESULT(atomic)
3695 AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1,
3696 [Defined if shared_ptr reference counting should use atomic operations.])
3698 AC_MSG_RESULT(mutex)
3704 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3706 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3707 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3708 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3709 dnl Where DEFAULT is 'yes'.
3711 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3712 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3714 if test x$enable_libstdcxx_visibility = xyes ; then
3715 dnl all hail libgfortran
3716 dnl Check whether the target supports hidden visibility.
3717 AC_CACHE_CHECK([whether the target supports hidden visibility],
3718 glibcxx_cv_have_attribute_visibility, [
3719 save_CFLAGS="$CFLAGS"
3720 CFLAGS="$CFLAGS -Werror"
3721 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3722 [], glibcxx_cv_have_attribute_visibility=yes,
3723 glibcxx_cv_have_attribute_visibility=no)
3724 CFLAGS="$save_CFLAGS"])
3725 if test $glibcxx_cv_have_attribute_visibility = no; then
3726 enable_libstdcxx_visibility=no
3730 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3731 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3736 dnl Add version tags to symbols in shared library (or not), additionally
3737 dnl marking other symbols as private/local (or not).
3739 dnl Sets libtool_VERSION, and determines shared library SONAME.
3741 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3743 dnl --enable-symvers=style adds a version script to the linker call when
3744 dnl creating the shared library. The choice of version script is
3745 dnl controlled by 'style'.
3746 dnl --disable-symvers does not.
3748 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3749 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3750 dnl choose a default style based on linker characteristics. Passing
3751 dnl 'no' disables versioning.
3753 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3755 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3756 [enables symbol versioning of the shared library],
3757 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3759 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3760 # don't know enough about $LD to do tricks...
3761 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3762 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3763 # with extern "C++" in version scripts.
3764 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3766 # Turn a 'yes' into a suitable default.
3767 if test x$enable_symvers = xyes ; then
3768 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3771 if test $with_gnu_ld = yes ; then
3772 case ${target_os} in
3774 enable_symvers=no ;;
3776 enable_symvers=gnu ;;
3779 case ${target_os} in
3781 enable_symvers=darwin ;;
3782 # Sun symbol versioning exists since Solaris 2.5.
3783 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3784 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3785 # version scripts, so disable symbol versioning if none can be
3787 if test -z "$ac_cv_path_CXXFILT"; then
3788 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3789 AC_MSG_WARN([=== no GNU c++filt could be found.])
3790 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3797 enable_symvers=no ;;
3803 # Check to see if 'darwin' or 'darwin-export' can win.
3804 if test x$enable_symvers = xdarwin-export ; then
3805 enable_symvers=darwin
3808 # Check if 'sun' was requested on non-Solaris 2 platforms.
3809 if test x$enable_symvers = xsun ; then
3810 case ${target_os} in
3816 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3817 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3818 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3824 # Check to see if 'gnu' can win.
3825 if test $enable_symvers = gnu ||
3826 test $enable_symvers = gnu-versioned-namespace ||
3827 test $enable_symvers = sun; then
3828 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3829 AC_MSG_CHECKING([for shared libgcc])
3830 ac_save_CFLAGS="$CFLAGS"
3832 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3833 CFLAGS="$ac_save_CFLAGS"
3834 if test $glibcxx_shared_libgcc = no; then
3835 cat > conftest.c <<EOF
3836 int main (void) { return 0; }
3839 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3840 -shared -shared-libgcc -o conftest.so \
3841 conftest.c -v 2>&1 >/dev/null \
3842 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3844 rm -f conftest.c conftest.so
3845 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3846 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3847 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3848 CFLAGS="$ac_save_CFLAGS"
3851 AC_MSG_RESULT($glibcxx_shared_libgcc)
3853 # For GNU ld, we need at least this version. The format is described in
3854 # GLIBCXX_CHECK_LINKER_FEATURES above.
3855 glibcxx_min_gnu_ld_version=21400
3857 # If no shared libgcc, can't win.
3858 if test $glibcxx_shared_libgcc != yes; then
3859 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3860 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3861 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3863 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3864 : All interesting versions of Sun ld support sun style symbol versioning.
3865 elif test $with_gnu_ld != yes ; then
3867 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3868 AC_MSG_WARN([=== you are not using the GNU linker.])
3869 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3871 elif test $glibcxx_ld_is_gold = yes ; then
3872 : All versions of gold support symbol versioning.
3873 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3874 # The right tools, the right setup, but too old. Fallbacks?
3875 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3876 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3877 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3878 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3879 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3884 # For libtool versioning info, format is CURRENT:REVISION:AGE
3885 libtool_VERSION=6:29:0
3887 # Everything parsed; figure out what files and settings to use.
3888 case $enable_symvers in
3890 SYMVER_FILE=config/abi/pre/none.ver
3893 SYMVER_FILE=config/abi/pre/gnu.ver
3894 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3895 [Define to use GNU versioning in the shared library.])
3897 gnu-versioned-namespace)
3898 libtool_VERSION=8:0:0
3899 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3900 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3901 [Define to use GNU namespace versioning in the shared library.])
3904 SYMVER_FILE=config/abi/pre/gnu.ver
3905 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3906 [Define to use darwin versioning in the shared library.])
3909 SYMVER_FILE=config/abi/pre/gnu.ver
3910 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3911 [Define to use Sun versioning in the shared library.])
3915 if test x$enable_symvers != xno ; then
3916 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3917 [Define to use symbol versioning in the shared library.])
3920 AC_CACHE_CHECK([whether the target supports .symver directive],
3921 glibcxx_cv_have_as_symver_directive, [
3922 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3923 [], glibcxx_cv_have_as_symver_directive=yes,
3924 glibcxx_cv_have_as_symver_directive=no)])
3925 if test $glibcxx_cv_have_as_symver_directive = yes; then
3926 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3927 [Define to 1 if the target assembler supports .symver directive.])
3930 AC_SUBST(SYMVER_FILE)
3931 AC_SUBST(port_specific_symbol_files)
3932 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3933 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3934 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3935 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3936 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3937 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3939 if test $enable_symvers != no ; then
3940 case ${target_os} in
3941 # The Solaris 2 runtime linker doesn't support the GNU extension of
3942 # binding the same symbol to different versions
3945 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3947 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3948 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3953 # Now, set up compatibility support, if any.
3954 # In addition, need this to deal with std::size_t mangling in
3955 # src/compatibility.cc. In a perfect world, could use
3956 # typeid(std::size_t).name()[0] to do direct substitution.
3957 AC_MSG_CHECKING([for size_t as unsigned int])
3958 ac_save_CFLAGS="$CFLAGS"
3960 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3961 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3962 CFLAGS=$ac_save_CFLAGS
3963 if test "$glibcxx_size_t_is_i" = yes; then
3964 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3966 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3968 AC_MSG_CHECKING([for ptrdiff_t as int])
3969 ac_save_CFLAGS="$CFLAGS"
3971 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3972 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3973 CFLAGS=$ac_save_CFLAGS
3974 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3975 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3977 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3982 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3983 dnl We must stage the required headers so that they will be installed
3984 dnl with the library (unlike libgcc, the STL implementation is provided
3985 dnl solely within headers). Since we must not inject random user-space
3986 dnl macro names into user-provided C++ code, we first stage into <file>-in
3987 dnl and process to <file> with an output command. The reason for a two-
3988 dnl stage process here is to correctly handle $srcdir!=$objdir without
3989 dnl having to write complex code (the sed commands to clean the macro
3990 dnl namespace are complex and fragile enough as it is). We must also
3991 dnl add a relative path so that -I- is supported properly.
3996 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3997 AC_MSG_CHECKING([for thread model used by GCC])
3998 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3999 AC_MSG_RESULT([$target_thread_file])
4000 GCC_AC_THREAD_HEADER([$target_thread_file])
4005 dnl Check if gthread implementation defines the types and functions
4006 dnl required by the c++0x thread library. Conforming gthread
4007 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
4009 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
4011 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
4012 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
4014 if test x$enable_libstdcxx_threads = xauto ||
4015 test x$enable_libstdcxx_threads = xyes; then
4020 ac_save_CXXFLAGS="$CXXFLAGS"
4021 CXXFLAGS="$CXXFLAGS -fno-exceptions \
4022 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
4024 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
4025 case $target_thread_file in
4027 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
4030 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
4032 AC_TRY_COMPILE([#include <unistd.h>],
4034 // In case of POSIX threads check _POSIX_TIMEOUTS.
4035 #if (defined(_PTHREADS) \
4036 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
4039 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
4041 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
4042 [Define to 1 if mutex_timedlock is available.])
4044 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
4045 else res_mutex_timedlock=no ; fi
4046 AC_MSG_RESULT([$res_mutex_timedlock])
4048 AC_MSG_CHECKING([for gthreads library])
4050 AC_TRY_COMPILE([#include "gthr.h"],
4052 #ifndef __GTHREADS_CXX0X
4055 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
4060 AC_MSG_RESULT([$ac_has_gthreads])
4062 if test x"$ac_has_gthreads" = x"yes"; then
4063 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
4064 [Define if gthreads library is available.])
4066 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
4067 # but only do so if we're using pthread in the gthread library.
4068 # On VxWorks for example, pthread_rwlock_t is defined in sys/types.h
4069 # but the pthread library is not there by default and the gthread library
4071 AC_TRY_COMPILE([#include "gthr.h"],
4073 #if (!defined(_PTHREADS))
4076 ], [ac_gthread_use_pthreads=yes], [ac_gthread_use_pthreads=no])
4077 if test x"$ac_gthread_use_pthreads" = x"yes"; then
4078 AC_CHECK_TYPE([pthread_rwlock_t],
4079 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
4080 [Define if POSIX read/write locks are available in <gthr.h>.])],
4082 [#include "gthr.h"])
4086 AC_CHECK_HEADER(semaphore.h, [
4087 AC_MSG_CHECKING([for POSIX Semaphores and sem_timedwait])
4090 #include <semaphore.h>
4094 #if !defined _POSIX_TIMEOUTS || _POSIX_TIMEOUTS <= 0
4095 # error "POSIX Timeouts option not supported"
4096 #elif !defined _POSIX_SEMAPHORES || _POSIX_SEMAPHORES <= 0
4097 # error "POSIX Semaphores option not supported"
4099 #if defined SEM_VALUE_MAX
4100 constexpr int sem_value_max = SEM_VALUE_MAX;
4101 #elif defined _POSIX_SEM_VALUE_MAX
4102 constexpr int sem_value_max = _POSIX_SEM_VALUE_MAX;
4104 # error "SEM_VALUE_MAX not available"
4107 sem_init(&sem, 0, sem_value_max);
4108 struct timespec ts = { 0 };
4109 sem_timedwait(&sem, &ts);
4112 [ac_have_posix_semaphore=yes],
4113 [ac_have_posix_semaphore=no])],
4114 [ac_have_posix_semaphore=no])
4116 if test $ac_have_posix_semaphore = yes ; then
4117 AC_DEFINE(_GLIBCXX_HAVE_POSIX_SEMAPHORE,
4119 [Define to 1 if POSIX Semaphores with sem_timedwait are available in <semaphore.h>.])
4121 AC_MSG_RESULT([$ac_have_posix_semaphore])
4123 CXXFLAGS="$ac_save_CXXFLAGS"
4128 # Check whether LC_MESSAGES is available in <locale.h>.
4129 # Ulrich Drepper <drepper@cygnus.com>, 1995.
4131 # This file file be copied and used freely without restrictions. It can
4132 # be used in projects which are not available under the GNU Public License
4133 # but which still want to provide support for the GNU gettext functionality.
4134 # Please note that the actual code is *not* freely available.
4135 AC_DEFUN([AC_LC_MESSAGES], [
4136 AC_CHECK_HEADER(locale.h, [
4137 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
4138 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
4139 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
4140 if test $ac_cv_val_LC_MESSAGES = yes; then
4141 AC_DEFINE(HAVE_LC_MESSAGES, 1,
4142 [Define if LC_MESSAGES is available in <locale.h>.])
4148 dnl Check whether rdrand is supported in the assembler.
4149 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
4150 AC_MSG_CHECKING([for rdrand support in assembler])
4151 AC_CACHE_VAL(ac_cv_x86_rdrand, [
4156 AC_TRY_COMPILE(, [asm("rdrand %eax");],
4157 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
4160 if test $ac_cv_x86_rdrand = yes; then
4161 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
4162 [ Defined if as can handle rdrand. ])
4164 AC_MSG_RESULT($ac_cv_x86_rdrand)
4168 dnl Check whether rdseed is supported in the assembler.
4169 AC_DEFUN([GLIBCXX_CHECK_X86_RDSEED], [
4170 AC_MSG_CHECKING([for rdseed support in assembler])
4171 AC_CACHE_VAL(ac_cv_x86_rdseed, [
4176 AC_TRY_COMPILE(, [asm("rdseed %eax");],
4177 [ac_cv_x86_rdseed=yes], [ac_cv_x86_rdseed=no])
4180 if test $ac_cv_x86_rdseed = yes; then
4181 AC_DEFINE(_GLIBCXX_X86_RDSEED, 1,
4182 [ Defined if as can handle rdseed. ])
4184 AC_MSG_RESULT($ac_cv_x86_rdseed)
4188 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
4190 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
4194 ac_save_CXXFLAGS="$CXXFLAGS"
4195 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4197 AC_MSG_CHECKING([for get_nprocs])
4198 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
4199 GCC_TRY_COMPILE_OR_LINK(
4200 [#include <sys/sysinfo.h>],
4201 [int n = get_nprocs();],
4202 [glibcxx_cv_GET_NPROCS=yes],
4203 [glibcxx_cv_GET_NPROCS=no])
4205 if test $glibcxx_cv_GET_NPROCS = yes; then
4206 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
4208 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
4210 CXXFLAGS="$ac_save_CXXFLAGS"
4215 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
4217 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
4221 ac_save_CXXFLAGS="$CXXFLAGS"
4222 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4224 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
4225 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
4226 GCC_TRY_COMPILE_OR_LINK(
4227 [#include <unistd.h>],
4228 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
4229 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
4230 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
4232 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
4233 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
4235 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
4237 CXXFLAGS="$ac_save_CXXFLAGS"
4242 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
4244 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
4248 ac_save_CXXFLAGS="$CXXFLAGS"
4249 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4251 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
4252 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
4253 GCC_TRY_COMPILE_OR_LINK(
4254 [#include <unistd.h>],
4255 [int n = sysconf(_SC_NPROC_ONLN);],
4256 [glibcxx_cv_SC_NPROC_ONLN=yes],
4257 [glibcxx_cv_SC_NPROC_ONLN=no])
4259 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
4260 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
4262 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
4264 CXXFLAGS="$ac_save_CXXFLAGS"
4269 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
4271 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
4275 ac_save_CXXFLAGS="$CXXFLAGS"
4276 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4278 AC_MSG_CHECKING([for pthreads_num_processors_np])
4279 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
4280 GCC_TRY_COMPILE_OR_LINK(
4281 [#include <pthread.h>],
4282 [int n = pthread_num_processors_np();],
4283 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
4284 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
4286 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
4287 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
4289 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
4291 CXXFLAGS="$ac_save_CXXFLAGS"
4296 dnl Check whether pthread_cond_clockwait is available in <pthread.h> for std::condition_variable to use,
4297 dnl and define _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT.
4299 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT], [
4303 ac_save_CXXFLAGS="$CXXFLAGS"
4304 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4305 ac_save_LIBS="$LIBS"
4306 LIBS="$LIBS -lpthread"
4308 AC_MSG_CHECKING([for pthread_cond_clockwait])
4309 AC_CACHE_VAL(glibcxx_cv_PTHREAD_COND_CLOCKWAIT, [
4310 GCC_TRY_COMPILE_OR_LINK(
4311 [#include <pthread.h>],
4312 [pthread_mutex_t mutex; pthread_cond_t cond; struct timespec ts; int n = pthread_cond_clockwait(&cond, &mutex, 0, &ts);],
4313 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=yes],
4314 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=no])
4316 if test $glibcxx_cv_PTHREAD_COND_CLOCKWAIT = yes; then
4317 AC_DEFINE(_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT, 1, [Define if pthread_cond_clockwait is available in <pthread.h>.])
4319 AC_MSG_RESULT($glibcxx_cv_PTHREAD_COND_CLOCKWAIT)
4321 CXXFLAGS="$ac_save_CXXFLAGS"
4322 LIBS="$ac_save_LIBS"
4327 dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use,
4328 dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK.
4330 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK], [
4334 ac_save_CXXFLAGS="$CXXFLAGS"
4335 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4336 ac_save_LIBS="$LIBS"
4337 LIBS="$LIBS -lpthread"
4339 AC_MSG_CHECKING([for pthread_mutex_clocklock])
4340 AC_CACHE_VAL(glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK, [
4341 GCC_TRY_COMPILE_OR_LINK(
4342 [#include <pthread.h>],
4343 [pthread_mutex_t mutex; struct timespec ts; int n = pthread_mutex_clocklock(&mutex, CLOCK_REALTIME, &ts);],
4344 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=yes],
4345 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=no])
4347 if test $glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK = yes; then
4348 AC_DEFINE(_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK, 1, [Define if pthread_mutex_clocklock is available in <pthread.h>.])
4350 AC_MSG_RESULT($glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK)
4352 CXXFLAGS="$ac_save_CXXFLAGS"
4353 LIBS="$ac_save_LIBS"
4358 dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use,
4359 dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK.
4361 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_RWLOCK_CLOCKLOCK], [
4365 ac_save_CXXFLAGS="$CXXFLAGS"
4366 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4367 ac_save_LIBS="$LIBS"
4368 LIBS="$LIBS -lpthread"
4370 AC_MSG_CHECKING([for pthread_rwlock_clockrdlock, pthread_wlock_clockwrlock])
4371 AC_CACHE_VAL(glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK, [
4372 GCC_TRY_COMPILE_OR_LINK(
4373 [#include <pthread.h>],
4374 [pthread_rwlock_t rwl; struct timespec ts;]
4375 [int n = pthread_rwlock_clockrdlock(&rwl, CLOCK_REALTIME, &ts);]
4376 [int m = pthread_rwlock_clockwrlock(&rwl, CLOCK_REALTIME, &ts);],
4377 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=yes],
4378 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=no])
4380 if test $glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK = yes; then
4381 AC_DEFINE(_GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK, 1, [Define if pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock are available in <pthread.h>.])
4383 AC_MSG_RESULT($glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK)
4385 CXXFLAGS="$ac_save_CXXFLAGS"
4386 LIBS="$ac_save_LIBS"
4391 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
4393 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4397 ac_save_CXXFLAGS="$CXXFLAGS"
4398 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4400 AC_MSG_CHECKING([for hw.ncpu sysctl])
4401 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4402 GCC_TRY_COMPILE_OR_LINK(
4405 #include <sys/sysctl.h>
4409 size_t size = sizeof(count);
4410 int mib[] = { CTL_HW, HW_NCPU };
4411 sysctl(mib, 2, &count, &size, NULL, 0);
4413 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4414 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4416 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4417 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4419 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4421 CXXFLAGS="$ac_save_CXXFLAGS"
4426 dnl Check to see if python pretty printing can be activated.
4428 dnl --with-python-dir=dir
4429 dnl installs directory into $prefix/dir
4430 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4432 AC_MSG_CHECKING([for custom python install directory])
4433 AC_ARG_WITH([python-dir],
4434 AS_HELP_STRING([--with-python-dir],
4435 [the location to install Python modules. This path is relative starting from the prefix.]),
4436 [with_python_dir=$withval], [with_python_dir="no"])
4437 AC_MSG_RESULT(${with_python_dir})
4439 # Needed for installing Python modules during make install.
4440 python_mod_dir="${with_python_dir}"
4441 AC_SUBST(python_mod_dir)
4442 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4446 dnl Check to see if -Werror is disabled.
4448 dnl --enable-werror/--disable-werror
4449 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4450 AC_MSG_CHECKING([for -Werror])
4451 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4452 AC_MSG_RESULT($enable_werror)
4453 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4457 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4458 dnl and define _GLIBCXX_USE_TMPNAM.
4460 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4464 ac_save_CXXFLAGS="$CXXFLAGS"
4465 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4467 AC_MSG_CHECKING([for tmpnam])
4468 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4469 GCC_TRY_COMPILE_OR_LINK(
4470 [#include <stdio.h>],
4471 [char *tmp = tmpnam(NULL);],
4472 [glibcxx_cv_TMPNAM=yes],
4473 [glibcxx_cv_TMPNAM=no])
4475 if test $glibcxx_cv_TMPNAM = yes; then
4476 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4478 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4480 CXXFLAGS="$ac_save_CXXFLAGS"
4485 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4486 dnl Some versions of sdt.h were not compatible with C++11.
4488 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4489 AC_MSG_CHECKING([for suitable sys/sdt.h])
4490 # Note that this test has to be run with the C language.
4491 # Otherwise, sdt.h will try to include some headers from
4495 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4496 # Because we have to run the test in C, we use grep rather
4497 # than the compiler to check for the bug. The bug is that
4498 # were strings without trailing whitespace, causing g++
4499 # to look for operator"". The pattern searches for the fixed
4501 AC_EGREP_CPP([ \",\" ], [
4502 #include <sys/sdt.h>
4503 int f() { STAP_PROBE(hi, bob); }
4504 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4507 if test $glibcxx_cv_sys_sdt_h = yes; then
4508 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4509 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4511 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4515 dnl Control whether the library should define symbols for old and new ABIs.
4516 dnl This affects definitions of strings, stringstreams and locale facets.
4518 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4521 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4523 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4524 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4525 if test x$enable_symvers = xgnu-versioned-namespace; then
4526 # gnu-versioned-namespace is incompatible with the dual ABI.
4527 enable_libstdcxx_dual_abi="no"
4529 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4530 AC_MSG_NOTICE([dual ABI is disabled])
4531 default_libstdcxx_abi="gcc4-compatible"
4533 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4537 dnl Check to see which ABI should be enabled by default.
4539 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4542 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4544 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4545 if test x$enable_libstdcxx_dual_abi = xyes; then
4546 AC_MSG_CHECKING([for default std::string ABI to use])
4547 AC_ARG_WITH([default-libstdcxx-abi],
4548 AS_HELP_STRING([--with-default-libstdcxx-abi],
4549 [set the std::string ABI to use by default]),
4551 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4552 new|cxx11) default_libstdcxx_abi="new" ;;
4553 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4554 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4557 [default_libstdcxx_abi="new"])
4558 AC_MSG_RESULT(${default_libstdcxx_abi})
4560 if test $default_libstdcxx_abi = "new"; then
4567 AC_SUBST(glibcxx_cxx98_abi)
4568 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4572 dnl Check to see whether to build libstdc++fs.a
4574 dnl --enable-libstdcxx-filesystem-ts
4576 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4577 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4578 [turns on ISO/IEC TS 18822 support],
4579 [permit yes|no|auto])
4581 AC_MSG_CHECKING([whether to build Filesystem TS support])
4582 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4583 enable_libstdcxx_filesystem_ts=no
4585 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4586 case "${target_os}" in
4587 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4588 enable_libstdcxx_filesystem_ts=yes
4590 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu | uclinux*)
4591 enable_libstdcxx_filesystem_ts=yes
4594 enable_libstdcxx_filesystem_ts=yes
4597 enable_libstdcxx_filesystem_ts=yes
4600 enable_libstdcxx_filesystem_ts=yes
4603 enable_libstdcxx_filesystem_ts=no
4607 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4608 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4612 dnl Check whether the library calls required by the C++17 Filesystem library
4613 dnl and the Filesystem TS are present.
4615 dnl HAVE_STRUCT_DIRENT_D_TYPE
4616 dnl _GLIBCXX_USE_REALPATH
4617 dnl _GLIBCXX_USE_UTIMENSAT
4618 dnl _GLIBCXX_USE_ST_MTIM
4619 dnl _GLIBCXX_USE_FCHMOD
4620 dnl _GLIBCXX_USE_FCHMODAT
4621 dnl _GLIBCXX_USE_SENDFILE
4626 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4630 ac_save_CXXFLAGS="$CXXFLAGS"
4631 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4633 AC_MSG_CHECKING([for struct dirent.d_type])
4634 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4635 GCC_TRY_COMPILE_OR_LINK(
4636 [#include <dirent.h>],
4639 if (sizeof d.d_type) return 0;
4641 [glibcxx_cv_dirent_d_type=yes],
4642 [glibcxx_cv_dirent_d_type=no])
4644 if test $glibcxx_cv_dirent_d_type = yes; then
4645 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4647 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
4649 AC_MSG_CHECKING([for realpath])
4650 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4651 GCC_TRY_COMPILE_OR_LINK(
4658 #if _XOPEN_VERSION < 500
4660 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4661 char *tmp = realpath((const char*)NULL, (char*)NULL);
4666 [glibcxx_cv_realpath=yes],
4667 [glibcxx_cv_realpath=no])
4669 if test $glibcxx_cv_realpath = yes; then
4670 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4672 AC_MSG_RESULT($glibcxx_cv_realpath)
4674 AC_MSG_CHECKING([for utimensat])
4675 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4676 GCC_TRY_COMPILE_OR_LINK(
4679 #include <sys/stat.h>
4682 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4683 int i = utimensat(AT_FDCWD, "path", ts, 0);
4685 [glibcxx_cv_utimensat=yes],
4686 [glibcxx_cv_utimensat=no])
4688 if test $glibcxx_cv_utimensat = yes; then
4689 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4691 AC_MSG_RESULT($glibcxx_cv_utimensat)
4693 AC_MSG_CHECKING([for utime])
4694 AC_CACHE_VAL(glibcxx_cv_utime, [dnl
4695 GCC_TRY_COMPILE_OR_LINK(
4700 struct utimbuf t = { 1, 1 };
4701 int i = utime("path", &t);
4703 [glibcxx_cv_utime=yes],
4704 [glibcxx_cv_utime=no])
4706 if test $glibcxx_cv_utime = yes; then
4707 AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.])
4709 AC_MSG_RESULT($glibcxx_cv_utime)
4711 AC_MSG_CHECKING([for lstat])
4712 AC_CACHE_VAL(glibcxx_cv_lstat, [dnl
4713 GCC_TRY_COMPILE_OR_LINK(
4714 [ #include <sys/stat.h> ],
4717 int i = lstat("path", &st);
4719 [glibcxx_cv_lstat=yes],
4720 [glibcxx_cv_lstat=no])
4722 if test $glibcxx_cv_lstat = yes; then
4723 AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.])
4725 AC_MSG_RESULT($glibcxx_cv_lstat)
4727 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4728 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4729 GCC_TRY_COMPILE_OR_LINK(
4730 [ #include <sys/stat.h> ],
4733 return st.st_mtim.tv_nsec;
4735 [glibcxx_cv_st_mtim=yes],
4736 [glibcxx_cv_st_mtim=no])
4738 if test $glibcxx_cv_st_mtim = yes; then
4739 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4741 AC_MSG_RESULT($glibcxx_cv_st_mtim)
4743 AC_MSG_CHECKING([for fchmod])
4744 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4745 GCC_TRY_COMPILE_OR_LINK(
4746 [#include <sys/stat.h>],
4747 [fchmod(1, S_IWUSR);],
4748 [glibcxx_cv_fchmod=yes],
4749 [glibcxx_cv_fchmod=no])
4751 if test $glibcxx_cv_fchmod = yes; then
4752 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4754 AC_MSG_RESULT($glibcxx_cv_fchmod)
4756 AC_MSG_CHECKING([for fchmodat])
4757 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4758 GCC_TRY_COMPILE_OR_LINK(
4761 #include <sys/stat.h>
4763 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4764 [glibcxx_cv_fchmodat=yes],
4765 [glibcxx_cv_fchmodat=no])
4767 if test $glibcxx_cv_fchmodat = yes; then
4768 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4770 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4772 AC_MSG_CHECKING([for sendfile that can copy files])
4773 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4774 case "${target_os}" in
4775 gnu* | linux* | solaris* | uclinux*)
4776 GCC_TRY_COMPILE_OR_LINK(
4777 [#include <sys/sendfile.h>],
4778 [sendfile(1, 2, (off_t*)0, sizeof 1);],
4779 [glibcxx_cv_sendfile=yes],
4780 [glibcxx_cv_sendfile=no])
4783 glibcxx_cv_sendfile=no
4787 if test $glibcxx_cv_sendfile = yes; then
4788 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.])
4790 AC_MSG_RESULT($glibcxx_cv_sendfile)
4792 AC_MSG_CHECKING([for link])
4793 AC_CACHE_VAL(glibcxx_cv_link, [dnl
4794 GCC_TRY_COMPILE_OR_LINK(
4795 [#include <unistd.h>],
4797 [glibcxx_cv_link=yes],
4798 [glibcxx_cv_link=no])
4800 if test $glibcxx_cv_link = yes; then
4801 AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.])
4803 AC_MSG_RESULT($glibcxx_cv_link)
4805 AC_MSG_CHECKING([for readlink])
4806 AC_CACHE_VAL(glibcxx_cv_readlink, [dnl
4807 GCC_TRY_COMPILE_OR_LINK(
4808 [#include <unistd.h>],
4809 [char buf[32]; readlink("", buf, sizeof(buf));],
4810 [glibcxx_cv_readlink=yes],
4811 [glibcxx_cv_readlink=no])
4813 if test $glibcxx_cv_readlink = yes; then
4814 AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.])
4816 AC_MSG_RESULT($glibcxx_cv_readlink)
4818 AC_MSG_CHECKING([for symlink])
4819 AC_CACHE_VAL(glibcxx_cv_symlink, [dnl
4820 GCC_TRY_COMPILE_OR_LINK(
4821 [#include <unistd.h>],
4823 [glibcxx_cv_symlink=yes],
4824 [glibcxx_cv_symlink=no])
4826 if test $glibcxx_cv_symlink = yes; then
4827 AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.])
4829 AC_MSG_RESULT($glibcxx_cv_symlink)
4831 AC_MSG_CHECKING([for truncate])
4832 AC_CACHE_VAL(glibcxx_cv_truncate, [dnl
4833 GCC_TRY_COMPILE_OR_LINK(
4834 [#include <unistd.h>],
4835 [truncate("", 99);],
4836 [glibcxx_cv_truncate=yes],
4837 [glibcxx_cv_truncate=no])
4839 if test $glibcxx_cv_truncate = yes; then
4840 AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.])
4842 AC_MSG_RESULT($glibcxx_cv_truncate)
4844 CXXFLAGS="$ac_save_CXXFLAGS"
4849 dnl Check how size_t is mangled. Copied from libitm.
4851 AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4852 AC_CACHE_CHECK([how size_t is mangled],
4853 glibcxx_cv_size_t_mangling, [
4854 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4855 [glibcxx_cv_size_t_mangling=m], [
4856 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4857 [glibcxx_cv_size_t_mangling=j], [
4859 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4860 [glibcxx_cv_size_t_mangling=y], [
4862 [extern __SIZE_TYPE__ x; extern unsigned short x;],
4863 [glibcxx_cv_size_t_mangling=t], [
4865 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;],
4866 [glibcxx_cv_size_t_mangling=u6uint20],
4867 [glibcxx_cv_size_t_mangling=x])
4873 if test $glibcxx_cv_size_t_mangling = x; then
4874 AC_MSG_ERROR([Unknown underlying type for size_t])
4876 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4877 [Define to the letter to which size_t is mangled.])
4881 dnl Determine whether std::exception_ptr symbols should be exported with
4882 dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which
4883 dnl release first added support for std::exception_ptr. Originally it was
4884 dnl only supported for targets with always-lock-free atomics for int, but
4885 dnl since GCC 7.1 it is supported for all targets.
4887 AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [
4888 if test $enable_symvers != no; then
4889 AC_MSG_CHECKING([for first version to support std::exception_ptr])
4891 aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \
4892 m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* )
4893 ac_exception_ptr_since_gcc46=yes
4896 # If the value of this macro changes then we will need to hardcode
4897 # yes/no here for additional targets based on the original value.
4898 AC_TRY_COMPILE([], [
4899 #if __GCC_ATOMIC_INT_LOCK_FREE <= 1
4900 # error atomic int not always lock free
4903 [ac_exception_ptr_since_gcc46=yes],
4904 [ac_exception_ptr_since_gcc46=no])
4907 if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then
4908 AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1,
4909 [Define to 1 if GCC 4.6 supported std::exception_ptr for the target])
4910 AC_MSG_RESULT([4.6.0])
4912 AC_MSG_RESULT([7.1.0])
4917 # Macros from the top-level gcc directory.
4918 m4_include([../config/gc++filt.m4])
4919 m4_include([../config/tls.m4])
4920 m4_include([../config/gthr.m4])
4921 m4_include([../config/cet.m4])