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($enable_c99)
1377 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1378 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1379 dnl in the C++11 standard.
1381 dnl --enable-libstdcxx-time
1382 dnl --enable-libstdcxx-time=yes
1383 dnl checks for the availability of monotonic and realtime clocks,
1384 dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1385 dnl links in the latter.
1386 dnl --enable-libstdcxx-time=rt
1387 dnl also searches (and, if needed, links) librt. Note that this is
1388 dnl not always desirable because, in glibc 2.16 and earlier, for
1389 dnl example, in turn it triggers the linking of libpthread too,
1390 dnl which activates locking,
1391 dnl a large overhead for single-thread programs.
1392 dnl --enable-libstdcxx-time=no
1393 dnl --disable-libstdcxx-time
1394 dnl disables the checks completely
1396 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1397 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1398 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1399 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1401 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1403 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
1404 [use KIND for check type],
1409 ac_save_CXXFLAGS="$CXXFLAGS"
1410 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1411 ac_save_LIBS="$LIBS"
1413 ac_has_clock_monotonic=no
1414 ac_has_clock_realtime=no
1416 ac_has_sched_yield=no
1418 if test x"$enable_libstdcxx_time" = x"auto"; then
1420 case "${target_os}" in
1422 ac_has_nanosleep=yes
1425 ac_has_nanosleep=yes
1426 ac_has_sched_yield=yes
1428 # VxWorks has nanosleep as soon as the kernel is configured with
1429 # INCLUDE_POSIX_TIMERS, which is normally/most-often the case.
1431 ac_has_nanosleep=yes
1433 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1434 # Don't use link test for freestanding library, in case gcc_no_link=yes
1435 if test x"$is_hosted" = xyes; then
1436 # Versions of glibc before 2.17 needed -lrt for clock_gettime.
1437 AC_SEARCH_LIBS(clock_gettime, [rt])
1438 if test x"$ac_cv_search_clock_gettime" = x"none required"; then
1439 ac_has_clock_monotonic=yes
1440 ac_has_clock_realtime=yes
1443 ac_has_nanosleep=yes
1444 ac_has_sched_yield=yes
1446 freebsd*|netbsd*|dragonfly*|rtems*)
1447 ac_has_clock_monotonic=yes
1448 ac_has_clock_realtime=yes
1449 ac_has_nanosleep=yes
1450 ac_has_sched_yield=yes
1453 ac_has_clock_monotonic=yes
1454 ac_has_clock_realtime=yes
1455 ac_has_nanosleep=yes
1458 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
1459 ac_has_clock_monotonic=yes
1460 ac_has_clock_realtime=yes
1461 ac_has_nanosleep=yes
1462 ac_has_sched_yield=yes
1465 ac_has_nanosleep=yes
1466 ac_has_sched_yield=yes
1469 elif test x"$enable_libstdcxx_time" != x"no"; then
1471 if test x"$enable_libstdcxx_time" = x"rt"; then
1472 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1473 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1475 AC_SEARCH_LIBS(clock_gettime, [posix4])
1476 AC_SEARCH_LIBS(nanosleep, [posix4])
1479 case "$ac_cv_search_clock_gettime" in
1480 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1483 case "$ac_cv_search_nanosleep" in
1484 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1488 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1490 case "$ac_cv_search_sched_yield" in
1492 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1493 ac_has_sched_yield=yes
1496 if test x"$enable_libstdcxx_time" = x"rt"; then
1497 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1498 ac_has_sched_yield=yes
1502 ac_has_sched_yield=yes
1506 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1508 if test x"$ac_has_unistd_h" = x"yes"; then
1509 AC_MSG_CHECKING([for monotonic clock])
1511 [#include <unistd.h>
1514 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1517 clock_gettime(CLOCK_MONOTONIC, &tp);
1518 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1520 AC_MSG_RESULT($ac_has_clock_monotonic)
1522 AC_MSG_CHECKING([for realtime clock])
1524 [#include <unistd.h>
1527 [#if _POSIX_TIMERS > 0
1530 clock_gettime(CLOCK_REALTIME, &tp);
1531 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1533 AC_MSG_RESULT($ac_has_clock_realtime)
1535 AC_MSG_CHECKING([for nanosleep])
1537 [#include <unistd.h>
1540 [#if _POSIX_TIMERS > 0
1544 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1546 AC_MSG_RESULT($ac_has_nanosleep)
1550 if test x"$ac_has_clock_monotonic" != x"yes"; then
1551 case ${target_os} in
1553 AC_MSG_CHECKING([for clock_gettime syscall])
1555 [#include <unistd.h>
1557 #include <sys/syscall.h>
1559 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1562 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1563 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1564 ], [ac_has_clock_gettime_syscall=yes], [ac_has_clock_gettime_syscall=no])
1565 AC_MSG_RESULT($ac_has_clock_gettime_syscall)
1566 if test x"$ac_has_clock_gettime_syscall" = x"yes"; then
1567 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1568 [Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1569 ac_has_clock_monotonic=yes
1570 ac_has_clock_realtime=yes
1571 AC_MSG_CHECKING([for struct timespec that matches syscall])
1574 #include <sys/syscall.h>
1576 [#ifdef SYS_clock_gettime64
1577 #if SYS_clock_gettime64 != SYS_clock_gettime
1578 // We need to use SYS_clock_gettime and libc appears to
1579 // also know about the SYS_clock_gettime64 syscall.
1580 // Check that userspace doesn't use time64 version of timespec.
1581 static_assert(sizeof(timespec::tv_sec) == sizeof(long),
1582 "struct timespec must be compatible with SYS_clock_gettime");
1586 [ac_timespec_matches_syscall=yes],
1587 [ac_timespec_matches_syscall=no])
1588 AC_MSG_RESULT($ac_timespec_matches_syscall)
1589 if test x"$ac_timespec_matches_syscall" = no; then
1590 AC_MSG_ERROR([struct timespec is not compatible with SYS_clock_gettime, please report a bug to http://gcc.gnu.org/bugzilla])
1596 if test x"$ac_has_clock_monotonic" = x"yes"; then
1597 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1598 [ Defined if clock_gettime has monotonic clock support. ])
1601 if test x"$ac_has_clock_realtime" = x"yes"; then
1602 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1603 [ Defined if clock_gettime has realtime clock support. ])
1606 if test x"$ac_has_sched_yield" = x"yes"; then
1607 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1608 [ Defined if sched_yield is available. ])
1611 if test x"$ac_has_nanosleep" = x"yes"; then
1612 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1613 [ Defined if nanosleep is available. ])
1615 AC_MSG_CHECKING([for sleep])
1616 AC_TRY_COMPILE([#include <unistd.h>],
1618 [ac_has_sleep=yes],[ac_has_sleep=no])
1619 if test x"$ac_has_sleep" = x"yes"; then
1620 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1622 AC_MSG_RESULT($ac_has_sleep)
1623 AC_MSG_CHECKING([for usleep])
1624 AC_TRY_COMPILE([#include <unistd.h>],
1627 [ac_has_usleep=yes],[ac_has_usleep=no])
1628 if test x"$ac_has_usleep" = x"yes"; then
1629 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1631 AC_MSG_RESULT($ac_has_usleep)
1634 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1635 AC_MSG_CHECKING([for Sleep])
1636 AC_TRY_COMPILE([#include <windows.h>],
1638 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1639 if test x"$ac_has_win32_sleep" = x"yes"; then
1640 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1642 AC_MSG_RESULT($ac_has_win32_sleep)
1645 AC_SUBST(GLIBCXX_LIBS)
1647 CXXFLAGS="$ac_save_CXXFLAGS"
1648 LIBS="$ac_save_LIBS"
1653 dnl Check for gettimeofday, used in the implementation of 20.11.7
1654 dnl [time.clock] in the C++11 standard.
1656 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1658 AC_MSG_CHECKING([for gettimeofday])
1662 ac_save_CXXFLAGS="$CXXFLAGS"
1663 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1665 ac_has_gettimeofday=no;
1666 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1667 if test x"$ac_has_sys_time_h" = x"yes"; then
1668 AC_MSG_CHECKING([for gettimeofday])
1669 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1670 [timeval tv; gettimeofday(&tv, 0);],
1671 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1673 AC_MSG_RESULT($ac_has_gettimeofday)
1676 if test x"$ac_has_gettimeofday" = x"yes"; then
1677 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1678 [ Defined if gettimeofday is available. ])
1681 CXXFLAGS="$ac_save_CXXFLAGS"
1686 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1687 dnl facilities in Chapter 8, "C compatibility".
1689 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1694 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1695 # undefined and fake C99 facilities may be spuriously enabled.
1696 ac_save_CXXFLAGS="$CXXFLAGS"
1697 CXXFLAGS="$CXXFLAGS -std=c++98"
1699 # Check for the existence of <complex.h> complex math functions used
1701 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1702 ac_c99_complex_tr1=no;
1703 if test x"$ac_has_complex_h" = x"yes"; then
1704 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1705 AC_TRY_COMPILE([#include <complex.h>],
1706 [typedef __complex__ float float_type; float_type tmpf;
1713 typedef __complex__ double double_type; double_type tmpd;
1720 typedef __complex__ long double ld_type; ld_type tmpld;
1727 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1729 AC_MSG_RESULT($ac_c99_complex_tr1)
1730 if test x"$ac_c99_complex_tr1" = x"yes"; then
1731 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1732 [Define if C99 functions in <complex.h> should be used in
1733 <tr1/complex>. Using compiler builtins for these functions
1734 requires corresponding C99 library functions to be present.])
1737 # Check for the existence of <ctype.h> functions.
1738 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1739 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1740 AC_TRY_COMPILE([#include <ctype.h>],
1744 ],[glibcxx_cv_c99_ctype_tr1=yes],
1745 [glibcxx_cv_c99_ctype_tr1=no])
1747 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1748 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1749 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1750 [Define if C99 functions in <ctype.h> should be imported in
1751 <tr1/cctype> in namespace std::tr1.])
1754 # Check for the existence of <fenv.h> functions.
1755 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1757 if test x"$ac_has_fenv_h" = x"yes"; then
1758 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1759 AC_TRY_COMPILE([#include <fenv.h>],
1764 ret = feclearexcept(except);
1765 ret = fegetexceptflag(pflag, except);
1766 ret = feraiseexcept(except);
1767 ret = fesetexceptflag(pflag, except);
1768 ret = fetestexcept(except);
1770 ret = fesetround(mode);
1771 ret = fegetenv(penv);
1772 ret = feholdexcept(penv);
1773 ret = fesetenv(penv);
1774 ret = feupdateenv(penv);
1775 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1777 AC_MSG_RESULT($ac_c99_fenv_tr1)
1778 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1779 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1780 [Define if C99 functions in <fenv.h> should be imported in
1781 <tr1/cfenv> in namespace std::tr1.])
1784 # Check for the existence of <stdint.h> types.
1785 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1786 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1787 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1788 #define __STDC_CONSTANT_MACROS
1789 #include <stdint.h>],
1790 [typedef int8_t my_int8_t;
1791 my_int8_t i8 = INT8_MIN;
1793 typedef int16_t my_int16_t;
1794 my_int16_t i16 = INT16_MIN;
1796 typedef int32_t my_int32_t;
1797 my_int32_t i32 = INT32_MIN;
1799 typedef int64_t my_int64_t;
1800 my_int64_t i64 = INT64_MIN;
1802 typedef int_fast8_t my_int_fast8_t;
1803 my_int_fast8_t if8 = INT_FAST8_MIN;
1804 if8 = INT_FAST8_MAX;
1805 typedef int_fast16_t my_int_fast16_t;
1806 my_int_fast16_t if16 = INT_FAST16_MIN;
1807 if16 = INT_FAST16_MAX;
1808 typedef int_fast32_t my_int_fast32_t;
1809 my_int_fast32_t if32 = INT_FAST32_MIN;
1810 if32 = INT_FAST32_MAX;
1811 typedef int_fast64_t my_int_fast64_t;
1812 my_int_fast64_t if64 = INT_FAST64_MIN;
1813 if64 = INT_FAST64_MAX;
1814 typedef int_least8_t my_int_least8_t;
1815 my_int_least8_t il8 = INT_LEAST8_MIN;
1816 il8 = INT_LEAST8_MAX;
1817 typedef int_least16_t my_int_least16_t;
1818 my_int_least16_t il16 = INT_LEAST16_MIN;
1819 il16 = INT_LEAST16_MAX;
1820 typedef int_least32_t my_int_least32_t;
1821 my_int_least32_t il32 = INT_LEAST32_MIN;
1822 il32 = INT_LEAST32_MAX;
1823 typedef int_least64_t my_int_least64_t;
1824 my_int_least64_t il64 = INT_LEAST64_MIN;
1825 il64 = INT_LEAST64_MAX;
1826 typedef intmax_t my_intmax_t;
1827 my_intmax_t im = INTMAX_MAX;
1829 typedef intptr_t my_intptr_t;
1830 my_intptr_t ip = INTPTR_MAX;
1832 typedef uint8_t my_uint8_t;
1833 my_uint8_t ui8 = UINT8_MAX;
1835 typedef uint16_t my_uint16_t;
1836 my_uint16_t ui16 = UINT16_MAX;
1838 typedef uint32_t my_uint32_t;
1839 my_uint32_t ui32 = UINT32_MAX;
1841 typedef uint64_t my_uint64_t;
1842 my_uint64_t ui64 = UINT64_MAX;
1844 typedef uint_fast8_t my_uint_fast8_t;
1845 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1846 uif8 = UINT_FAST8_MAX;
1847 typedef uint_fast16_t my_uint_fast16_t;
1848 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1849 uif16 = UINT_FAST16_MAX;
1850 typedef uint_fast32_t my_uint_fast32_t;
1851 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1852 uif32 = UINT_FAST32_MAX;
1853 typedef uint_fast64_t my_uint_fast64_t;
1854 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1855 uif64 = UINT_FAST64_MAX;
1856 typedef uint_least8_t my_uint_least8_t;
1857 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1858 uil8 = UINT_LEAST8_MAX;
1859 typedef uint_least16_t my_uint_least16_t;
1860 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1861 uil16 = UINT_LEAST16_MAX;
1862 typedef uint_least32_t my_uint_least32_t;
1863 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1864 uil32 = UINT_LEAST32_MAX;
1865 typedef uint_least64_t my_uint_least64_t;
1866 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1867 uil64 = UINT_LEAST64_MAX;
1868 typedef uintmax_t my_uintmax_t;
1869 my_uintmax_t uim = UINTMAX_MAX;
1871 typedef uintptr_t my_uintptr_t;
1872 my_uintptr_t uip = UINTPTR_MAX;
1874 ],[glibcxx_cv_c99_stdint_tr1=yes],
1875 [glibcxx_cv_c99_stdint_tr1=no])
1877 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1878 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1879 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1880 [Define if C99 types in <stdint.h> should be imported in
1881 <tr1/cstdint> in namespace std::tr1.])
1884 # Check for the existence of <math.h> functions.
1885 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1886 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1887 AC_TRY_COMPILE([#include <math.h>],
1888 [typedef double_t my_double_t;
1889 typedef float_t my_float_t;
1903 copysignf(0.0f, 0.0f);
1904 copysignl(0.0l, 0.0l);
1921 fmaf(0.0f, 0.0f, 0.0f);
1922 fmal(0.0l, 0.0l, 0.0l);
1938 #ifndef __APPLE__ /* see below */
1967 nextafter(0.0, 0.0);
1968 nextafterf(0.0f, 0.0f);
1969 nextafterl(0.0l, 0.0l);
1970 nexttoward(0.0, 0.0);
1971 nexttowardf(0.0f, 0.0f);
1972 nexttowardl(0.0l, 0.0l);
1973 remainder(0.0, 0.0);
1974 remainderf(0.0f, 0.0f);
1975 remainderl(0.0l, 0.0l);
1976 remquo(0.0, 0.0, 0);
1977 remquof(0.0f, 0.0f, 0);
1978 remquol(0.0l, 0.0l, 0);
1997 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1999 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
2000 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
2001 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
2002 [Define if C99 functions or macros in <math.h> should be imported
2003 in <tr1/cmath> in namespace std::tr1.])
2005 case "${target_os}" in
2007 AC_MSG_CHECKING([for ISO C99 rounding functions in <math.h>])
2008 AC_CACHE_VAL(glibcxx_cv_c99_math_llround, [
2009 AC_TRY_COMPILE([#include <math.h>],
2017 [glibcxx_cv_c99_math_llround=yes],
2018 [glibcxx_cv_c99_math_llround=no])
2020 AC_MSG_RESULT($glibcxx_cv_c99_math_llround)
2023 if test x"$glibcxx_cv_c99_math_llround" = x"no"; then
2024 AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1,
2025 [Define if C99 llrint and llround functions are missing from <math.h>.])
2029 # Check for the existence of <inttypes.h> functions (NB: doesn't make
2030 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
2031 ac_c99_inttypes_tr1=no;
2032 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2033 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
2034 AC_TRY_COMPILE([#include <inttypes.h>],
2035 [intmax_t i, numer, denom, base;
2038 intmax_t ret = imaxabs(i);
2039 imaxdiv_t dret = imaxdiv(numer, denom);
2040 ret = strtoimax(s, endptr, base);
2041 uintmax_t uret = strtoumax(s, endptr, base);
2042 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
2044 AC_MSG_RESULT($ac_c99_inttypes_tr1)
2045 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
2046 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
2047 [Define if C99 functions in <inttypes.h> should be imported in
2048 <tr1/cinttypes> in namespace std::tr1.])
2051 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
2052 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
2053 ac_c99_inttypes_wchar_t_tr1=no;
2054 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2055 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
2056 AC_TRY_COMPILE([#include <inttypes.h>],
2060 intmax_t ret = wcstoimax(s, endptr, base);
2061 uintmax_t uret = wcstoumax(s, endptr, base);
2062 ],[ac_c99_inttypes_wchar_t_tr1=yes],
2063 [ac_c99_inttypes_wchar_t_tr1=no])
2065 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
2066 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
2067 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
2068 [Define if wchar_t C99 functions in <inttypes.h> should be
2069 imported in <tr1/cinttypes> in namespace std::tr1.])
2072 # Check for the existence of the <stdbool.h> header.
2073 AC_CHECK_HEADERS(stdbool.h)
2075 # Check for the existence of the <stdalign.h> header.
2076 AC_CHECK_HEADERS(stdalign.h)
2078 CXXFLAGS="$ac_save_CXXFLAGS"
2083 dnl Check for uchar.h and usability.
2085 AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2088 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2092 ac_save_CXXFLAGS="$CXXFLAGS"
2093 CXXFLAGS="$CXXFLAGS -std=c++11"
2095 if test x"$ac_has_uchar_h" = x"yes"; then
2096 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2097 AC_TRY_COMPILE([#include <uchar.h>
2098 #ifdef __STDC_UTF_16__
2099 long i = __STDC_UTF_16__;
2101 #ifdef __STDC_UTF_32__
2102 long j = __STDC_UTF_32__;
2112 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2114 ac_c11_uchar_cxx11=no
2116 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2117 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2118 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2119 [Define if C11 functions in <uchar.h> should be imported into
2120 namespace std in <cuchar>.])
2123 CXXFLAGS="$ac_save_CXXFLAGS"
2129 dnl Check whether "/dev/random" and "/dev/urandom" are available for
2130 dnl class std::random_device from C++ 2011 [rand.device], and
2131 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2133 AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [
2135 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for std::random_device])
2136 AC_CACHE_VAL(glibcxx_cv_dev_random, [
2137 if test -r /dev/random && test -r /dev/urandom; then
2138 ## For MSys environment the test above is detected as false-positive
2139 ## on mingw-targets. So disable it explicitly for them.
2140 case ${target_os} in
2141 *mingw*) glibcxx_cv_dev_random=no ;;
2142 *) glibcxx_cv_dev_random=yes ;;
2145 glibcxx_cv_dev_random=no;
2148 AC_MSG_RESULT($glibcxx_cv_dev_random)
2150 if test x"$glibcxx_cv_dev_random" = x"yes"; then
2151 AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1,
2152 [Define if /dev/random and /dev/urandom are available for
2153 std::random_device.])
2154 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
2155 [Define if /dev/random and /dev/urandom are available for
2156 the random_device of TR1 (Chapter 5.1).])
2162 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2164 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2166 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
2167 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
2168 [#include <stdio.h>],
2169 [AC_MSG_ERROR([computing EOF failed])])
2171 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
2172 [Define to the value of the EOF integer constant.])
2174 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
2175 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
2176 [#include <stdio.h>],
2177 [AC_MSG_ERROR([computing SEEK_CUR failed])])
2179 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
2180 [Define to the value of the SEEK_CUR integer constant.])
2182 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
2183 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
2184 [#include <stdio.h>],
2185 [AC_MSG_ERROR([computing SEEK_END failed])])
2187 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
2188 [Define to the value of the SEEK_END integer constant.])
2192 dnl Check whether required C++ overloads are present in <stdio.h>.
2194 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2198 # Use C++11 because a conforming <stdio.h> won't define gets for C++14,
2199 # and we don't need a declaration for C++14 anyway.
2200 ac_save_CXXFLAGS="$CXXFLAGS"
2201 CXXFLAGS="$CXXFLAGS -std=gnu++11"
2203 AC_MSG_CHECKING([for gets declaration])
2204 AC_CACHE_VAL(glibcxx_cv_gets, [
2205 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2212 [glibcxx_cv_gets=yes],
2213 [glibcxx_cv_gets=no]
2216 if test $glibcxx_cv_gets = yes; then
2217 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.])
2219 AC_MSG_RESULT($glibcxx_cv_gets)
2221 CXXFLAGS="$ac_save_CXXFLAGS"
2226 dnl Check whether required C++11 overloads for floating point and integral
2227 dnl types are present in <math.h>.
2229 AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2233 ac_save_CXXFLAGS="$CXXFLAGS"
2234 CXXFLAGS="$CXXFLAGS -std=c++11"
2238 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch
2239 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads.
2240 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads])
2241 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [
2242 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2246 inline bool isfinite(float __x)
2247 { return __builtin_isfinite(__x); }
2250 [glibcxx_cv_math11_fp_overload=no],
2251 [glibcxx_cv_math11_fp_overload=yes]
2254 # autoheader cannot handle indented templates.
2255 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP],
2256 [/* Define if all C++11 floating point overloads are available in <math.h>. */
2257 #if __cplusplus >= 201103L
2258 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
2261 if test $glibcxx_cv_math11_fp_overload = yes; then
2262 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP)
2264 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload])
2266 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch
2267 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads.
2268 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads])
2269 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [
2270 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2273 template<typename _Tp>
2274 struct __is_integer;
2276 struct __is_integer<int>
2278 enum { __value = 1 };
2281 namespace __gnu_cxx {
2282 template<bool, typename>
2284 template<typename _Tp>
2285 struct __enable_if<true, _Tp>
2286 { typedef _Tp __type; };
2289 template<typename _Tp>
2290 constexpr typename __gnu_cxx::__enable_if
2291 <__is_integer<_Tp>::__value, double>::__type
2293 { return __builtin_log2(__x); }
2299 return std::log2(i);
2302 [glibcxx_cv_math11_int_overload=no],
2303 [glibcxx_cv_math11_int_overload=yes]
2306 # autoheader cannot handle indented templates.
2307 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT],
2308 [/* Define if all C++11 integral type overloads are available in <math.h>. */
2309 #if __cplusplus >= 201103L
2310 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT
2313 if test $glibcxx_cv_math11_int_overload = yes; then
2314 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT)
2316 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload])
2319 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2320 # functions (instead of or as well as the C99 generic macros) then we
2321 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2322 # and must use the ones from <math.h> instead.
2323 AC_MSG_CHECKING([for obsolete isinf function in <math.h>])
2324 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [
2325 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2326 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2332 bool isinf(long double);
2335 bool b = isinf(0.0);
2337 [glibcxx_cv_obsolete_isinf=yes],
2338 [glibcxx_cv_obsolete_isinf=no]
2340 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf])
2341 if test $glibcxx_cv_obsolete_isinf = yes; then
2342 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
2343 [Define if <math.h> defines obsolete isinf function.])
2346 AC_MSG_CHECKING([for obsolete isnan function in <math.h>])
2347 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [
2348 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2349 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2355 bool isnan(long double);
2358 bool b = isnan(0.0);
2360 [glibcxx_cv_obsolete_isnan=yes],
2361 [glibcxx_cv_obsolete_isnan=no]
2363 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan])
2364 if test $glibcxx_cv_obsolete_isnan = yes; then
2365 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
2366 [Define if <math.h> defines obsolete isnan function.])
2371 CXXFLAGS="$ac_save_CXXFLAGS"
2376 dnl Check whether macros, etc are present for <system_error>
2378 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2380 m4_pushdef([n_syserr], [1])dnl
2381 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
2382 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
2383 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2384 ECHILD, ENOSPC, EPERM,
2385 ETIMEDOUT, EWOULDBLOCK],
2386 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2387 AC_MSG_CHECKING([for syserr])
2388 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2389 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2390 [int i = syserr;])],
2391 [glibcxx_cv_system_error[]n_syserr=yes],
2392 [glibcxx_cv_system_error[]n_syserr=no])
2394 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2395 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2396 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2398 m4_define([n_syserr], m4_incr(n_syserr))dnl
2399 m4_popdef([SYSERR])dnl
2401 m4_popdef([n_syserr])dnl
2405 dnl Check for what type of C headers to use.
2407 dnl --enable-cheaders= [does stuff].
2408 dnl --disable-cheaders [does not do anything, really].
2409 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2410 dnl Where DEFAULT is either 'c' or 'c_global' or 'c_std'.
2412 dnl To use the obsolete 'c_std' headers use --enable-cheaders-obsolete as
2413 dnl well as --enable-cheaders=c_std, otherwise configure will fail.
2415 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2416 GLIBCXX_ENABLE(cheaders-obsolete,no,,
2417 [allow use of obsolete "C" headers for g++])
2418 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2419 [construct "C" headers for g++], [permit c|c_global|c_std])
2420 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2421 if test $enable_cheaders = c_std ; then
2422 AC_MSG_WARN([the --enable-cheaders=c_std configuration is obsolete, c_global should be used instead])
2423 AC_MSG_WARN([if you are unable to use c_global please report a bug or inform libstdc++@gcc.gnu.org])
2424 if test $enable_cheaders_obsolete != yes ; then
2425 AC_MSG_ERROR(use --enable-cheaders-obsolete to use c_std "C" headers)
2429 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2431 # Allow overrides to configure.host here.
2432 if test $enable_cheaders = c_global; then
2436 AC_SUBST(C_INCLUDE_DIR)
2437 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2438 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2439 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2440 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2445 dnl Check for which locale library to use. The choice is mapped to
2446 dnl a subdirectory of config/locale.
2448 dnl Default is generic.
2450 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2451 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2452 [use MODEL for target locale package],
2453 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2455 # Deal with gettext issues. Default to not using it (=no) until we detect
2456 # support for it later. Let the user turn it off via --e/d, but let that
2457 # default to on for easier handling.
2460 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2464 # Either a known package, or "auto"
2465 if test $enable_clocale = no || test $enable_clocale = yes; then
2468 enable_clocale_flag=$enable_clocale
2470 # Probe for locale model to use if none specified.
2471 # Default to "generic".
2472 if test $enable_clocale_flag = auto; then
2473 case ${target_os} in
2474 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2475 enable_clocale_flag=gnu
2478 enable_clocale_flag=darwin
2480 dragonfly* | freebsd*)
2481 enable_clocale_flag=dragonfly
2484 enable_clocale_flag=newlib
2487 if test x"$with_newlib" = x"yes"; then
2488 enable_clocale_flag=newlib
2490 enable_clocale_flag=generic
2496 # Sanity check model, and test for special functionality.
2497 if test $enable_clocale_flag = gnu; then
2498 AC_EGREP_CPP([_GLIBCXX_ok], [
2499 #include <features.h>
2500 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2503 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2505 # Set it to scream when it hurts.
2506 ac_save_CFLAGS="$CFLAGS"
2507 CFLAGS="-Wimplicit-function-declaration -Werror"
2509 # Use strxfrm_l if available.
2510 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2512 #include <locale.h>],
2513 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2514 AC_DEFINE(HAVE_STRXFRM_L, 1,
2515 [Define if strxfrm_l is available in <string.h>.]),)
2517 # Use strerror_l if available.
2518 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2520 #include <locale.h>],
2521 [__locale_t loc; strerror_l(5, loc);],
2522 AC_DEFINE(HAVE_STRERROR_L, 1,
2523 [Define if strerror_l is available in <string.h>.]),)
2525 CFLAGS="$ac_save_CFLAGS"
2528 # Perhaps use strerror_r if available, and strerror_l isn't.
2529 ac_save_CFLAGS="$CFLAGS"
2530 CFLAGS="-Wimplicit-function-declaration -Werror"
2531 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2533 #include <locale.h>],
2534 [char s[128]; strerror_r(5, s, 128);],
2535 AC_DEFINE(HAVE_STRERROR_R, 1,
2536 [Define if strerror_r is available in <string.h>.]),)
2537 CFLAGS="$ac_save_CFLAGS"
2539 # Set configure bits for specified locale package
2540 AC_MSG_CHECKING([for C locale to use])
2541 case ${enable_clocale_flag} in
2543 AC_MSG_RESULT(generic)
2545 CLOCALE_H=config/locale/generic/c_locale.h
2546 CLOCALE_CC=config/locale/generic/c_locale.cc
2547 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2548 CCOLLATE_CC=config/locale/generic/collate_members.cc
2549 CCTYPE_CC=config/locale/generic/ctype_members.cc
2550 CMESSAGES_H=config/locale/generic/messages_members.h
2551 CMESSAGES_CC=config/locale/generic/messages_members.cc
2552 CMONEY_CC=config/locale/generic/monetary_members.cc
2553 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2554 CTIME_H=config/locale/generic/time_members.h
2555 CTIME_CC=config/locale/generic/time_members.cc
2556 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2559 AC_MSG_RESULT(darwin)
2561 CLOCALE_H=config/locale/generic/c_locale.h
2562 CLOCALE_CC=config/locale/generic/c_locale.cc
2563 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2564 CCOLLATE_CC=config/locale/generic/collate_members.cc
2565 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2566 CMESSAGES_H=config/locale/generic/messages_members.h
2567 CMESSAGES_CC=config/locale/generic/messages_members.cc
2568 CMONEY_CC=config/locale/generic/monetary_members.cc
2569 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2570 CTIME_H=config/locale/generic/time_members.h
2571 CTIME_CC=config/locale/generic/time_members.cc
2572 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2576 AC_MSG_RESULT(dragonfly or freebsd)
2578 CLOCALE_H=config/locale/dragonfly/c_locale.h
2579 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2580 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2581 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2582 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2583 CMESSAGES_H=config/locale/generic/messages_members.h
2584 CMESSAGES_CC=config/locale/generic/messages_members.cc
2585 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2586 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2587 CTIME_H=config/locale/dragonfly/time_members.h
2588 CTIME_CC=config/locale/dragonfly/time_members.cc
2589 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2595 # Declare intention to use gettext, and add support for specific
2597 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2600 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2601 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2602 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2605 # Export the build objects.
2606 for ling in $ALL_LINGUAS; do \
2607 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2608 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2610 AC_SUBST(glibcxx_MOFILES)
2611 AC_SUBST(glibcxx_POFILES)
2613 CLOCALE_H=config/locale/gnu/c_locale.h
2614 CLOCALE_CC=config/locale/gnu/c_locale.cc
2615 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2616 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2617 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2618 CMESSAGES_H=config/locale/gnu/messages_members.h
2619 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2620 CMONEY_CC=config/locale/gnu/monetary_members.cc
2621 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2622 CTIME_H=config/locale/gnu/time_members.h
2623 CTIME_CC=config/locale/gnu/time_members.cc
2624 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2627 AC_MSG_RESULT(IEEE 1003.1)
2629 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2630 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2631 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2632 CCOLLATE_CC=config/locale/generic/collate_members.cc
2633 CCTYPE_CC=config/locale/generic/ctype_members.cc
2634 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2635 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2636 CMONEY_CC=config/locale/generic/monetary_members.cc
2637 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2638 CTIME_H=config/locale/generic/time_members.h
2639 CTIME_CC=config/locale/generic/time_members.cc
2640 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2643 AC_MSG_RESULT(newlib)
2645 CLOCALE_H=config/locale/generic/c_locale.h
2646 CLOCALE_CC=config/locale/generic/c_locale.cc
2647 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2648 CCOLLATE_CC=config/locale/generic/collate_members.cc
2649 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2650 CMESSAGES_H=config/locale/generic/messages_members.h
2651 CMESSAGES_CC=config/locale/generic/messages_members.cc
2652 CMONEY_CC=config/locale/generic/monetary_members.cc
2653 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2654 CTIME_H=config/locale/generic/time_members.h
2655 CTIME_CC=config/locale/generic/time_members.cc
2656 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2660 # This is where the testsuite looks for locale catalogs, using the
2661 # -DLOCALEDIR define during testsuite compilation.
2662 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2663 AC_SUBST(glibcxx_localedir)
2665 # A standalone libintl (e.g., GNU libintl) may be in use.
2666 if test $USE_NLS = yes; then
2667 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2668 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2670 if test $USE_NLS = yes; then
2671 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2672 [Define if NLS translations are to be used.])
2677 AC_SUBST(CMESSAGES_H)
2678 AC_SUBST(CCODECVT_CC)
2679 AC_SUBST(CCOLLATE_CC)
2681 AC_SUBST(CMESSAGES_CC)
2683 AC_SUBST(CNUMERIC_CC)
2686 AC_SUBST(CLOCALE_CC)
2687 AC_SUBST(CLOCALE_INTERNAL_H)
2692 dnl Check for which std::allocator base class to use. The choice is
2693 dnl mapped from a subdirectory of include/ext.
2697 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2698 AC_MSG_CHECKING([for std::allocator base class])
2699 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2700 [use KIND for target std::allocator base],
2701 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2703 # If they didn't use this option switch, or if they specified --enable
2704 # with no specific model, we'll have to look for one. If they
2705 # specified --disable (???), do likewise.
2706 if test $enable_libstdcxx_allocator = no ||
2707 test $enable_libstdcxx_allocator = yes;
2709 enable_libstdcxx_allocator=auto
2712 # Either a known package, or "auto". Auto implies the default choice
2713 # for a particular platform.
2714 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2716 # Probe for host-specific support if no specific model is specified.
2718 if test $enable_libstdcxx_allocator_flag = auto; then
2719 case ${target_os} in
2720 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2721 enable_libstdcxx_allocator_flag=new
2724 enable_libstdcxx_allocator_flag=new
2728 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2731 # Set configure bits for specified locale package
2732 case ${enable_libstdcxx_allocator_flag} in
2734 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2735 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2738 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2739 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2742 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2743 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2746 ALLOCATOR_H=config/allocator/new_allocator_base.h
2747 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2750 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2751 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2755 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2756 test $enable_libstdcxx_allocator_flag = new)
2757 AC_SUBST(ALLOCATOR_H)
2758 AC_SUBST(ALLOCATOR_NAME)
2763 dnl Check for whether the Boost-derived checks should be turned on.
2765 dnl --enable-concept-checks turns them on.
2766 dnl --disable-concept-checks leaves them off.
2767 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2768 dnl Where DEFAULT is either `yes' or `no'.
2770 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2771 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2772 if test $enable_concept_checks = yes; then
2773 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2774 [Define to use concept checking code from the boost libraries.])
2779 dnl Use extern templates.
2781 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2782 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2784 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2785 dnl Where DEFAULT is `yes' or `no'.
2787 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2789 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2791 AC_MSG_CHECKING([for extern template support])
2792 AC_MSG_RESULT([$enable_extern_template])
2794 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2798 dnl Use vtable verification.
2800 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2801 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2803 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2804 dnl Where DEFAULT is `yes' or `no'.
2806 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2808 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2810 AC_MSG_CHECKING([for vtable verify support])
2811 AC_MSG_RESULT([$enable_vtable_verify])
2814 if test $enable_vtable_verify = yes; then
2815 case ${target_os} in
2817 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2818 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2822 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2823 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2826 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2827 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2830 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2831 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2834 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2841 AC_SUBST(VTV_CXXFLAGS)
2842 AC_SUBST(VTV_PCH_CXXFLAGS)
2843 AC_SUBST(VTV_CXXLINKFLAGS)
2844 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2845 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2849 dnl Check for parallel mode pre-requisites, including OpenMP support.
2851 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2853 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2857 # See if configured libgomp/omp.h exists. (libgomp may be in
2858 # noconfigdirs but not explicitly disabled.)
2859 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2860 enable_parallel=yes;
2862 AC_MSG_NOTICE([target-libgomp not built])
2865 AC_MSG_CHECKING([for parallel mode support])
2866 AC_MSG_RESULT([$enable_parallel])
2871 dnl Check for which I/O library to use: stdio, or something specific.
2873 dnl Default is stdio.
2875 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2876 AC_MSG_CHECKING([for underlying I/O to use])
2877 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2878 [use target-specific I/O package], [permit stdio])
2880 # Now that libio has been removed, you can have any color you want as long
2881 # as it's black. This is one big no-op until other packages are added, but
2882 # showing the framework never hurts.
2883 case ${enable_cstdio} in
2885 CSTDIO_H=config/io/c_io_stdio.h
2886 BASIC_FILE_H=config/io/basic_file_stdio.h
2887 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2888 AC_MSG_RESULT(stdio)
2893 AC_SUBST(BASIC_FILE_H)
2894 AC_SUBST(BASIC_FILE_CC)
2899 dnl Check for "unusual" flags to pass to the compiler while building.
2901 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2902 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2903 dnl --disable-cxx-flags passes nothing.
2904 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2905 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2906 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2907 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2908 dnl If "default flags" is an empty string, the effect is the same
2909 dnl as --disable or --enable=no.
2911 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2912 AC_MSG_CHECKING([for extra compiler flags for building])
2913 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2914 [pass compiler FLAGS when building library],
2915 [case "x$enable_cxx_flags" in
2916 xno | x) enable_cxx_flags= ;;
2918 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2921 # Run through flags (either default or command-line) and set anything
2922 # extra (e.g., #defines) that must accompany particular g++ options.
2923 if test -n "$enable_cxx_flags"; then
2924 for f in $enable_cxx_flags; do
2928 *) # and we're trying to pass /what/ exactly?
2929 AC_MSG_ERROR([compiler flags start with a -]) ;;
2934 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2935 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2936 AC_SUBST(EXTRA_CXX_FLAGS)
2941 dnl Check to see if debugging libraries are to be built.
2943 dnl --enable-libstdcxx-debug
2944 dnl builds a separate set of debugging libraries in addition to the
2945 dnl normal (shared, static) libstdc++ binaries.
2947 dnl --disable-libstdcxx-debug
2948 dnl builds only one (non-debug) version of libstdc++.
2950 dnl --enable-libstdcxx-debug-flags=FLAGS
2951 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2953 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2954 dnl Where DEFAULT is either `yes' or `no'.
2956 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2957 AC_MSG_CHECKING([for additional debug build])
2959 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2960 if test x$enable_libstdcxx_debug = xyes; then
2961 if test -f $toplevel_builddir/../stage_final \
2962 && test -f $toplevel_builddir/../stage_current; then
2963 stage_final=`cat $toplevel_builddir/../stage_final`
2964 stage_current=`cat $toplevel_builddir/../stage_current`
2965 if test x$stage_current != x$stage_final ; then
2966 skip_debug_build=" (skipped for bootstrap stage $stage_current)"
2967 enable_libstdcxx_debug=no
2971 AC_MSG_RESULT($enable_libstdcxx_debug$skip_debug_build)
2972 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2977 dnl Check for explicit debug flags.
2979 dnl --enable-libstdcxx-debug-flags='-O1'
2980 dnl is a general method for passing flags to be used when
2981 dnl building debug libraries with --enable-libstdcxx-debug.
2983 dnl --disable-libstdcxx-debug-flags does nothing.
2984 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2985 dnl If "default flags" is an empty string, the effect is the same
2986 dnl as --disable or --enable=no.
2988 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2989 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2990 [pass compiler FLAGS when building debug library],
2991 [case "x$enable_libstdcxx_debug_flags" in
2992 xno | x) enable_libstdcxx_debug_flags= ;;
2994 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2997 # Option parsed, now set things appropriately
2998 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2999 AC_SUBST(DEBUG_FLAGS)
3001 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
3006 dnl Check if the user only wants a freestanding library implementation.
3008 dnl --disable-hosted-libstdcxx will turn off most of the library build,
3009 dnl installing only the headers required by [17.4.1.3] and the language
3010 dnl support library. More than that will be built (to keep the Makefiles
3011 dnl conveniently clean), but not installed.
3014 dnl is_hosted (yes/no)
3017 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
3019 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
3020 AC_ARG_ENABLE([hosted-libstdcxx],
3021 AC_HELP_STRING([--disable-hosted-libstdcxx],
3022 [only build freestanding C++ runtime support]),,
3025 enable_hosted_libstdcxx=no
3028 enable_hosted_libstdcxx=yes
3031 if test "$enable_hosted_libstdcxx" = no; then
3032 AC_MSG_NOTICE([Only freestanding libraries will be built])
3036 enable_libstdcxx_pch=no
3041 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
3042 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
3043 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
3048 dnl Check if the user wants a non-verbose library implementation.
3050 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
3051 dnl standard error on termination.
3054 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
3056 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
3057 AC_ARG_ENABLE([libstdcxx-verbose],
3058 AC_HELP_STRING([--disable-libstdcxx-verbose],
3059 [disable termination messages to standard error]),,
3060 [enable_libstdcxx_verbose=yes])
3061 if test x"$enable_libstdcxx_verbose" = xyes; then
3064 AC_MSG_NOTICE([verbose termination messages are disabled])
3067 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
3068 [Define to 1 if a verbose library is built, or 0 otherwise.])
3073 dnl Check for template specializations for the 'long long' type.
3074 dnl The result determines only whether 'long long' I/O is enabled; things
3075 dnl like numeric_limits<> specializations are always available.
3077 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
3078 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
3079 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
3080 dnl Where DEFAULT is either `yes' or `no'.
3082 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
3083 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
3084 if test $enable_long_long = yes; then
3085 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
3086 [Define if code specialized for long long should be used.])
3088 AC_MSG_CHECKING([for enabled long long specializations])
3089 AC_MSG_RESULT([$enable_long_long])
3094 dnl Check for decimal floating point.
3096 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
3098 dnl This checks to see if the host supports decimal floating point types.
3101 dnl _GLIBCXX_USE_DECIMAL_FLOAT
3103 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
3105 # Fake what AC_TRY_COMPILE does, without linking as this is
3106 # unnecessary for this test.
3108 cat > conftest.$ac_ext << EOF
3109 [#]line __oline__ "configure"
3119 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
3120 if AC_TRY_EVAL(ac_compile); then
3121 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
3122 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
3127 AC_MSG_RESULT($enable_dfp)
3132 dnl Check for GNU 128-bit integer and floating point types.
3134 dnl Note: also checks that the types aren't standard types.
3137 dnl _GLIBCXX_USE_INT128
3140 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
3145 # Fake what AC_TRY_COMPILE does, without linking as this is
3146 # unnecessary for this test.
3148 cat > conftest.$ac_ext << EOF
3149 [#]line __oline__ "configure"
3150 template<typename T1, typename T2>
3152 { typedef T2 type; };
3154 template<typename T>
3159 typename same<long, __int128>::type i1;
3160 typename same<long long, __int128>::type i2;
3164 AC_MSG_CHECKING([for __int128])
3165 if AC_TRY_EVAL(ac_compile); then
3166 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
3167 [Define if __int128 is supported on this host.])
3172 AC_MSG_RESULT($enable_int128)
3175 cat > conftest.$ac_ext << EOF
3176 [#]line __oline__ "configure"
3177 template<typename T1, typename T2>
3179 { typedef T2 type; };
3181 template<typename T>
3186 typename same<double, __float128>::type f1;
3187 typename same<long double, __float128>::type f2;
3191 AC_MSG_CHECKING([for __float128])
3192 if AC_TRY_EVAL(ac_compile); then
3197 AC_MSG_RESULT($enable_float128)
3198 GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes)
3205 dnl Check for template specializations for the 'wchar_t' type.
3207 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3208 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3209 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3210 dnl Where DEFAULT is either `yes' or `no'.
3212 dnl Necessary support must also be present.
3214 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3215 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3217 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3218 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3219 AC_MSG_CHECKING([for mbstate_t])
3220 AC_TRY_COMPILE([#include <wchar.h>],
3221 [mbstate_t teststate;],
3222 have_mbstate_t=yes, have_mbstate_t=no)
3223 AC_MSG_RESULT($have_mbstate_t)
3224 if test x"$have_mbstate_t" = xyes; then
3225 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3228 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3230 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3232 if test x"$enable_wchar_t" = x"yes"; then
3237 if test x"$ac_has_wchar_h" = xyes &&
3238 test x"$ac_has_wctype_h" = xyes; then
3239 AC_TRY_COMPILE([#include <wchar.h>
3300 ],[],[], [enable_wchar_t=no])
3308 if test x"$enable_wchar_t" = x"yes"; then
3309 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3310 [Define if code specialized for wchar_t should be used.])
3313 AC_MSG_CHECKING([for enabled wchar_t specializations])
3314 AC_MSG_RESULT([$enable_wchar_t])
3319 dnl Check to see if building and using a C++ precompiled header can be done.
3321 dnl --enable-libstdcxx-pch=yes
3322 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3323 dnl may work, after some light-hearted attempts to puzzle out compiler
3324 dnl support, flip bits on in include/Makefile.am
3326 dnl --disable-libstdcxx-pch
3327 dnl turns off attempts to use or build stdc++.h.gch.
3330 dnl glibcxx_PCHFLAGS
3332 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3333 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3334 if test $enable_libstdcxx_pch = yes; then
3335 AC_CACHE_CHECK([for compiler with PCH support],
3336 [glibcxx_cv_prog_CXX_pch],
3337 [ac_save_CXXFLAGS="$CXXFLAGS"
3338 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3341 echo '#include <math.h>' > conftest.h
3342 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3343 -o conftest.h.gch 1>&5 2>&1 &&
3344 echo '#error "pch failed"' > conftest.h &&
3345 echo '#include "conftest.h"' > conftest.cc &&
3346 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3348 glibcxx_cv_prog_CXX_pch=yes
3350 glibcxx_cv_prog_CXX_pch=no
3353 CXXFLAGS=$ac_save_CXXFLAGS
3356 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3359 AC_MSG_CHECKING([for enabled PCH])
3360 AC_MSG_RESULT([$enable_libstdcxx_pch])
3362 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3363 if test $enable_libstdcxx_pch = yes; then
3364 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3368 AC_SUBST(glibcxx_PCHFLAGS)
3373 dnl Check for atomic builtins.
3375 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3377 dnl This checks to see if the host supports the compiler-generated
3378 dnl builtins for atomic operations for various integral sizes. Note, this
3379 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3380 dnl that are used should be checked.
3383 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3385 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3388 old_CXXFLAGS="$CXXFLAGS"
3390 # Do link tests if possible, instead asm tests, limited to some platforms
3391 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3392 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3393 atomic_builtins_link_tests=no
3394 if test x$gcc_no_link != xyes; then
3395 # Can do link tests. Limit to some tested platforms
3397 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3398 atomic_builtins_link_tests=yes
3403 if test x$atomic_builtins_link_tests = xyes; then
3407 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3409 AC_MSG_CHECKING([for atomic builtins for bool])
3410 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3413 [typedef bool atomic_type;
3417 // N.B. __atomic_fetch_add is not supported for bool.
3418 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3420 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3421 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3423 [glibcxx_cv_atomic_bool=yes],
3424 [glibcxx_cv_atomic_bool=no])
3426 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3428 AC_MSG_CHECKING([for atomic builtins for short])
3429 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3432 [typedef short atomic_type;
3436 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3437 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3439 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3440 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3442 [glibcxx_cv_atomic_short=yes],
3443 [glibcxx_cv_atomic_short=no])
3445 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3447 AC_MSG_CHECKING([for atomic builtins for int])
3448 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3451 [typedef int atomic_type;
3455 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3456 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3458 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3459 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3461 [glibcxx_cv_atomic_int=yes],
3462 [glibcxx_cv_atomic_int=no])
3464 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3466 AC_MSG_CHECKING([for atomic builtins for long long])
3467 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3470 [typedef long long atomic_type;
3474 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3475 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3477 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3478 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3480 [glibcxx_cv_atomic_long_long=yes],
3481 [glibcxx_cv_atomic_long_long=no])
3483 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3489 # Compile unoptimized.
3492 # Fake what AC_TRY_COMPILE does.
3494 cat > conftest.$ac_ext << EOF
3495 [#]line __oline__ "configure"
3498 typedef bool atomic_type;
3502 // N.B. __atomic_fetch_add is not supported for bool.
3503 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3505 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3506 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3512 AC_MSG_CHECKING([for atomic builtins for bool])
3513 if AC_TRY_EVAL(ac_compile); then
3514 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3515 glibcxx_cv_atomic_bool=no
3517 glibcxx_cv_atomic_bool=yes
3520 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3523 cat > conftest.$ac_ext << EOF
3524 [#]line __oline__ "configure"
3527 typedef short atomic_type;
3531 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3532 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3534 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3535 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3541 AC_MSG_CHECKING([for atomic builtins for short])
3542 if AC_TRY_EVAL(ac_compile); then
3543 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3544 glibcxx_cv_atomic_short=no
3546 glibcxx_cv_atomic_short=yes
3549 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3552 cat > conftest.$ac_ext << EOF
3553 [#]line __oline__ "configure"
3556 // NB: _Atomic_word not necessarily int.
3557 typedef int atomic_type;
3561 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3562 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3564 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3565 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3571 AC_MSG_CHECKING([for atomic builtins for int])
3572 if AC_TRY_EVAL(ac_compile); then
3573 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3574 glibcxx_cv_atomic_int=no
3576 glibcxx_cv_atomic_int=yes
3579 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3582 cat > conftest.$ac_ext << EOF
3583 [#]line __oline__ "configure"
3586 typedef long long atomic_type;
3590 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3591 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3593 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3594 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3600 AC_MSG_CHECKING([for atomic builtins for long long])
3601 if AC_TRY_EVAL(ac_compile); then
3602 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3603 glibcxx_cv_atomic_long_long=no
3605 glibcxx_cv_atomic_long_long=yes
3608 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3613 CXXFLAGS="$old_CXXFLAGS"
3616 # Set atomicity_dir to builtins if all but the long long test above passes,
3617 # or if the builtins were already chosen (e.g. by configure.host).
3618 if { test "$glibcxx_cv_atomic_bool" = yes \
3619 && test "$glibcxx_cv_atomic_short" = yes \
3620 && test "$glibcxx_cv_atomic_int" = yes; } \
3621 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
3622 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3623 [Define if the compiler supports C++11 atomics.])
3624 atomicity_dir=cpu/generic/atomicity_builtins
3627 # If still generic, set to mutex.
3628 if test $atomicity_dir = "cpu/generic" ; then
3629 atomicity_dir=cpu/generic/atomicity_mutex
3630 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3631 if test "x$target_thread_file" = xsingle; then
3632 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3633 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3635 AC_MSG_WARN([They will be faked using a mutex.])
3636 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3643 dnl Set default lock policy for synchronizing shared_ptr reference counting.
3645 dnl --with-libstdcxx-lock-policy=auto
3646 dnl Use atomic operations for shared_ptr reference counting only if
3647 dnl the default target supports atomic compare-and-swap.
3648 dnl --with-libstdcxx-lock-policy=atomic
3649 dnl Use atomic operations for shared_ptr reference counting.
3650 dnl --with-libstdcxx-lock-policy=mutex
3651 dnl Use a mutex to synchronize shared_ptr reference counting.
3653 dnl This controls the value of __gnu_cxx::__default_lock_policy, which
3654 dnl determines how shared_ptr reference counts are synchronized.
3655 dnl The option "atomic" means that atomic operations should be used,
3656 dnl "mutex" means that a mutex will be used. The default option, "auto",
3657 dnl will check if the target supports the compiler-generated builtins
3658 dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers,
3659 dnl and will use "atomic" if supported, "mutex" otherwise.
3660 dnl This option is ignored if the thread model used by GCC is "single",
3661 dnl as no synchronization is used at all in that case.
3662 dnl This option affects the library ABI (except in the "single" thread model).
3664 dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used.
3666 AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [
3668 AC_ARG_WITH([libstdcxx-lock-policy],
3669 AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}],
3670 [synchronization policy for shared_ptr reference counting [default=auto]]),
3671 [libstdcxx_atomic_lock_policy=$withval],
3672 [libstdcxx_atomic_lock_policy=auto])
3674 case "$libstdcxx_atomic_lock_policy" in
3675 atomic|mutex|auto) ;;
3676 *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;;
3678 AC_MSG_CHECKING([for lock policy for shared_ptr reference counts])
3680 if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then
3683 ac_save_CXXFLAGS="$CXXFLAGS"
3685 dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?!
3687 #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
3688 # error "No 2-byte compare-and-swap"
3689 #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
3690 # error "No 4-byte compare-and-swap"
3693 [libstdcxx_atomic_lock_policy=atomic],
3694 [libstdcxx_atomic_lock_policy=mutex])
3696 CXXFLAGS="$ac_save_CXXFLAGS"
3699 if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then
3700 AC_MSG_RESULT(atomic)
3701 AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1,
3702 [Defined if shared_ptr reference counting should use atomic operations.])
3704 AC_MSG_RESULT(mutex)
3710 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3712 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3713 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3714 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3715 dnl Where DEFAULT is 'yes'.
3717 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3718 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3720 if test x$enable_libstdcxx_visibility = xyes ; then
3721 dnl all hail libgfortran
3722 dnl Check whether the target supports hidden visibility.
3723 AC_CACHE_CHECK([whether the target supports hidden visibility],
3724 glibcxx_cv_have_attribute_visibility, [
3725 save_CFLAGS="$CFLAGS"
3726 CFLAGS="$CFLAGS -Werror"
3727 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3728 [], glibcxx_cv_have_attribute_visibility=yes,
3729 glibcxx_cv_have_attribute_visibility=no)
3730 CFLAGS="$save_CFLAGS"])
3731 if test $glibcxx_cv_have_attribute_visibility = no; then
3732 enable_libstdcxx_visibility=no
3736 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3737 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3742 dnl Add version tags to symbols in shared library (or not), additionally
3743 dnl marking other symbols as private/local (or not).
3745 dnl Sets libtool_VERSION, and determines shared library SONAME.
3747 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3749 dnl --enable-symvers=style adds a version script to the linker call when
3750 dnl creating the shared library. The choice of version script is
3751 dnl controlled by 'style'.
3752 dnl --disable-symvers does not.
3754 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3755 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3756 dnl choose a default style based on linker characteristics. Passing
3757 dnl 'no' disables versioning.
3759 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3761 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3762 [enables symbol versioning of the shared library],
3763 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3765 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3766 # don't know enough about $LD to do tricks...
3767 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3768 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3769 # with extern "C++" in version scripts.
3770 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3772 # Turn a 'yes' into a suitable default.
3773 if test x$enable_symvers = xyes ; then
3774 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3777 if test $with_gnu_ld = yes ; then
3778 case ${target_os} in
3780 enable_symvers=no ;;
3782 enable_symvers=gnu ;;
3785 case ${target_os} in
3787 enable_symvers=darwin ;;
3788 # Sun symbol versioning exists since Solaris 2.5.
3789 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3790 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3791 # version scripts, so disable symbol versioning if none can be
3793 if test -z "$ac_cv_path_CXXFILT"; then
3794 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3795 AC_MSG_WARN([=== no GNU c++filt could be found.])
3796 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3803 enable_symvers=no ;;
3809 # Check to see if 'darwin' or 'darwin-export' can win.
3810 if test x$enable_symvers = xdarwin-export ; then
3811 enable_symvers=darwin
3814 # Check if 'sun' was requested on non-Solaris 2 platforms.
3815 if test x$enable_symvers = xsun ; then
3816 case ${target_os} in
3822 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3823 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3824 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3830 # Check to see if 'gnu' can win.
3831 if test $enable_symvers = gnu ||
3832 test $enable_symvers = gnu-versioned-namespace ||
3833 test $enable_symvers = sun; then
3834 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3835 AC_MSG_CHECKING([for shared libgcc])
3836 ac_save_CFLAGS="$CFLAGS"
3838 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3839 CFLAGS="$ac_save_CFLAGS"
3840 if test $glibcxx_shared_libgcc = no; then
3841 cat > conftest.c <<EOF
3842 int main (void) { return 0; }
3845 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3846 -shared -shared-libgcc -o conftest.so \
3847 conftest.c -v 2>&1 >/dev/null \
3848 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3850 rm -f conftest.c conftest.so
3851 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3852 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3853 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3854 CFLAGS="$ac_save_CFLAGS"
3857 AC_MSG_RESULT($glibcxx_shared_libgcc)
3859 # For GNU ld, we need at least this version. The format is described in
3860 # GLIBCXX_CHECK_LINKER_FEATURES above.
3861 glibcxx_min_gnu_ld_version=21400
3863 # If no shared libgcc, can't win.
3864 if test $glibcxx_shared_libgcc != yes; then
3865 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3866 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3867 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3869 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3870 : All interesting versions of Sun ld support sun style symbol versioning.
3871 elif test $with_gnu_ld != yes ; then
3873 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3874 AC_MSG_WARN([=== you are not using the GNU linker.])
3875 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3877 elif test $glibcxx_ld_is_gold = yes ; then
3878 : All versions of gold support symbol versioning.
3879 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3880 # The right tools, the right setup, but too old. Fallbacks?
3881 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3882 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3883 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3884 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3885 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3890 # For libtool versioning info, format is CURRENT:REVISION:AGE
3891 libtool_VERSION=6:29:0
3893 # Everything parsed; figure out what files and settings to use.
3894 case $enable_symvers in
3896 SYMVER_FILE=config/abi/pre/none.ver
3899 SYMVER_FILE=config/abi/pre/gnu.ver
3900 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3901 [Define to use GNU versioning in the shared library.])
3903 gnu-versioned-namespace)
3904 libtool_VERSION=8:0:0
3905 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3906 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3907 [Define to use GNU namespace versioning in the shared library.])
3910 SYMVER_FILE=config/abi/pre/gnu.ver
3911 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3912 [Define to use darwin versioning in the shared library.])
3915 SYMVER_FILE=config/abi/pre/gnu.ver
3916 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3917 [Define to use Sun versioning in the shared library.])
3921 if test x$enable_symvers != xno ; then
3922 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3923 [Define to use symbol versioning in the shared library.])
3926 AC_CACHE_CHECK([whether the target supports .symver directive],
3927 glibcxx_cv_have_as_symver_directive, [
3928 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3929 [], glibcxx_cv_have_as_symver_directive=yes,
3930 glibcxx_cv_have_as_symver_directive=no)])
3931 if test $glibcxx_cv_have_as_symver_directive = yes; then
3932 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3933 [Define to 1 if the target assembler supports .symver directive.])
3936 AC_SUBST(SYMVER_FILE)
3937 AC_SUBST(port_specific_symbol_files)
3938 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3939 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3940 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3941 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3942 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3943 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3945 if test $enable_symvers != no ; then
3946 case ${target_os} in
3947 # The Solaris 2 runtime linker doesn't support the GNU extension of
3948 # binding the same symbol to different versions
3951 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3953 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3954 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3959 # Now, set up compatibility support, if any.
3960 # In addition, need this to deal with std::size_t mangling in
3961 # src/compatibility.cc. In a perfect world, could use
3962 # typeid(std::size_t).name()[0] to do direct substitution.
3963 AC_MSG_CHECKING([for size_t as unsigned int])
3964 ac_save_CFLAGS="$CFLAGS"
3966 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3967 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3968 CFLAGS=$ac_save_CFLAGS
3969 if test "$glibcxx_size_t_is_i" = yes; then
3970 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3972 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3974 AC_MSG_CHECKING([for ptrdiff_t as int])
3975 ac_save_CFLAGS="$CFLAGS"
3977 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3978 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3979 CFLAGS=$ac_save_CFLAGS
3980 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3981 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3983 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3988 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3989 dnl We must stage the required headers so that they will be installed
3990 dnl with the library (unlike libgcc, the STL implementation is provided
3991 dnl solely within headers). Since we must not inject random user-space
3992 dnl macro names into user-provided C++ code, we first stage into <file>-in
3993 dnl and process to <file> with an output command. The reason for a two-
3994 dnl stage process here is to correctly handle $srcdir!=$objdir without
3995 dnl having to write complex code (the sed commands to clean the macro
3996 dnl namespace are complex and fragile enough as it is). We must also
3997 dnl add a relative path so that -I- is supported properly.
4002 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
4003 AC_MSG_CHECKING([for thread model used by GCC])
4004 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
4005 AC_MSG_RESULT([$target_thread_file])
4006 GCC_AC_THREAD_HEADER([$target_thread_file])
4011 dnl Check if gthread implementation defines the types and functions
4012 dnl required by the c++0x thread library. Conforming gthread
4013 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
4015 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
4017 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
4018 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
4020 if test x$enable_libstdcxx_threads = xauto ||
4021 test x$enable_libstdcxx_threads = xyes; then
4026 ac_save_CXXFLAGS="$CXXFLAGS"
4027 CXXFLAGS="$CXXFLAGS -fno-exceptions \
4028 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
4030 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
4031 case $target_thread_file in
4033 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
4036 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
4038 AC_TRY_COMPILE([#include <unistd.h>],
4040 // In case of POSIX threads check _POSIX_TIMEOUTS.
4041 #if (defined(_PTHREADS) \
4042 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
4045 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
4047 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
4048 [Define to 1 if mutex_timedlock is available.])
4050 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
4051 else res_mutex_timedlock=no ; fi
4052 AC_MSG_RESULT([$res_mutex_timedlock])
4054 AC_MSG_CHECKING([for gthreads library])
4056 AC_TRY_COMPILE([#include "gthr.h"],
4058 #ifndef __GTHREADS_CXX0X
4061 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
4066 AC_MSG_RESULT([$ac_has_gthreads])
4068 if test x"$ac_has_gthreads" = x"yes"; then
4069 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
4070 [Define if gthreads library is available.])
4072 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
4073 # but only do so if we're using pthread in the gthread library.
4074 # On VxWorks for example, pthread_rwlock_t is defined in sys/types.h
4075 # but the pthread library is not there by default and the gthread library
4077 AC_TRY_COMPILE([#include "gthr.h"],
4079 #if (!defined(_PTHREADS))
4082 ], [ac_gthread_use_pthreads=yes], [ac_gthread_use_pthreads=no])
4083 if test x"$ac_gthread_use_pthreads" = x"yes"; then
4084 AC_CHECK_TYPE([pthread_rwlock_t],
4085 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
4086 [Define if POSIX read/write locks are available in <gthr.h>.])],
4088 [#include "gthr.h"])
4092 CXXFLAGS="$ac_save_CXXFLAGS"
4097 # Check whether LC_MESSAGES is available in <locale.h>.
4098 # Ulrich Drepper <drepper@cygnus.com>, 1995.
4100 # This file file be copied and used freely without restrictions. It can
4101 # be used in projects which are not available under the GNU Public License
4102 # but which still want to provide support for the GNU gettext functionality.
4103 # Please note that the actual code is *not* freely available.
4104 AC_DEFUN([AC_LC_MESSAGES], [
4105 AC_CHECK_HEADER(locale.h, [
4106 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
4107 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
4108 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
4109 if test $ac_cv_val_LC_MESSAGES = yes; then
4110 AC_DEFINE(HAVE_LC_MESSAGES, 1,
4111 [Define if LC_MESSAGES is available in <locale.h>.])
4117 dnl Check whether rdrand is supported in the assembler.
4118 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
4119 AC_MSG_CHECKING([for rdrand support in assembler])
4120 AC_CACHE_VAL(ac_cv_x86_rdrand, [
4125 AC_TRY_COMPILE(, [asm("rdrand %eax");],
4126 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
4129 if test $ac_cv_x86_rdrand = yes; then
4130 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
4131 [ Defined if as can handle rdrand. ])
4133 AC_MSG_RESULT($ac_cv_x86_rdrand)
4137 dnl Check whether rdseed is supported in the assembler.
4138 AC_DEFUN([GLIBCXX_CHECK_X86_RDSEED], [
4139 AC_MSG_CHECKING([for rdseed support in assembler])
4140 AC_CACHE_VAL(ac_cv_x86_rdseed, [
4145 AC_TRY_COMPILE(, [asm("rdseed %eax");],
4146 [ac_cv_x86_rdseed=yes], [ac_cv_x86_rdseed=no])
4149 if test $ac_cv_x86_rdseed = yes; then
4150 AC_DEFINE(_GLIBCXX_X86_RDSEED, 1,
4151 [ Defined if as can handle rdseed. ])
4153 AC_MSG_RESULT($ac_cv_x86_rdseed)
4157 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
4159 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
4163 ac_save_CXXFLAGS="$CXXFLAGS"
4164 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4166 AC_MSG_CHECKING([for get_nprocs])
4167 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
4168 GCC_TRY_COMPILE_OR_LINK(
4169 [#include <sys/sysinfo.h>],
4170 [int n = get_nprocs();],
4171 [glibcxx_cv_GET_NPROCS=yes],
4172 [glibcxx_cv_GET_NPROCS=no])
4174 if test $glibcxx_cv_GET_NPROCS = yes; then
4175 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
4177 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
4179 CXXFLAGS="$ac_save_CXXFLAGS"
4184 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
4186 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
4190 ac_save_CXXFLAGS="$CXXFLAGS"
4191 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4193 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
4194 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
4195 GCC_TRY_COMPILE_OR_LINK(
4196 [#include <unistd.h>],
4197 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
4198 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
4199 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
4201 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
4202 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
4204 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
4206 CXXFLAGS="$ac_save_CXXFLAGS"
4211 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
4213 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
4217 ac_save_CXXFLAGS="$CXXFLAGS"
4218 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4220 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
4221 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
4222 GCC_TRY_COMPILE_OR_LINK(
4223 [#include <unistd.h>],
4224 [int n = sysconf(_SC_NPROC_ONLN);],
4225 [glibcxx_cv_SC_NPROC_ONLN=yes],
4226 [glibcxx_cv_SC_NPROC_ONLN=no])
4228 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
4229 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
4231 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
4233 CXXFLAGS="$ac_save_CXXFLAGS"
4238 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
4240 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
4244 ac_save_CXXFLAGS="$CXXFLAGS"
4245 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4247 AC_MSG_CHECKING([for pthreads_num_processors_np])
4248 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
4249 GCC_TRY_COMPILE_OR_LINK(
4250 [#include <pthread.h>],
4251 [int n = pthread_num_processors_np();],
4252 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
4253 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
4255 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
4256 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
4258 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
4260 CXXFLAGS="$ac_save_CXXFLAGS"
4265 dnl Check whether pthread_cond_clockwait is available in <pthread.h> for std::condition_variable to use,
4266 dnl and define _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT.
4268 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT], [
4272 ac_save_CXXFLAGS="$CXXFLAGS"
4273 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4274 ac_save_LIBS="$LIBS"
4275 LIBS="$LIBS -lpthread"
4277 AC_MSG_CHECKING([for pthread_cond_clockwait])
4278 AC_CACHE_VAL(glibcxx_cv_PTHREAD_COND_CLOCKWAIT, [
4279 GCC_TRY_COMPILE_OR_LINK(
4280 [#include <pthread.h>],
4281 [pthread_mutex_t mutex; pthread_cond_t cond; struct timespec ts; int n = pthread_cond_clockwait(&cond, &mutex, 0, &ts);],
4282 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=yes],
4283 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=no])
4285 if test $glibcxx_cv_PTHREAD_COND_CLOCKWAIT = yes; then
4286 AC_DEFINE(_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT, 1, [Define if pthread_cond_clockwait is available in <pthread.h>.])
4288 AC_MSG_RESULT($glibcxx_cv_PTHREAD_COND_CLOCKWAIT)
4290 CXXFLAGS="$ac_save_CXXFLAGS"
4291 LIBS="$ac_save_LIBS"
4296 dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use,
4297 dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK.
4299 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK], [
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_mutex_clocklock])
4309 AC_CACHE_VAL(glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK, [
4310 GCC_TRY_COMPILE_OR_LINK(
4311 [#include <pthread.h>],
4312 [pthread_mutex_t mutex; struct timespec ts; int n = pthread_mutex_clocklock(&mutex, CLOCK_REALTIME, &ts);],
4313 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=yes],
4314 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=no])
4316 if test $glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK = yes; then
4317 AC_DEFINE(_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK, 1, [Define if pthread_mutex_clocklock is available in <pthread.h>.])
4319 AC_MSG_RESULT($glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK)
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_RWLOCK_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_rwlock_clockrdlock, pthread_wlock_clockwrlock])
4340 AC_CACHE_VAL(glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK, [
4341 GCC_TRY_COMPILE_OR_LINK(
4342 [#include <pthread.h>],
4343 [pthread_rwlock_t rwl; struct timespec ts;]
4344 [int n = pthread_rwlock_clockrdlock(&rwl, CLOCK_REALTIME, &ts);]
4345 [int m = pthread_rwlock_clockwrlock(&rwl, CLOCK_REALTIME, &ts);],
4346 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=yes],
4347 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=no])
4349 if test $glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK = yes; then
4350 AC_DEFINE(_GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK, 1, [Define if pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock are available in <pthread.h>.])
4352 AC_MSG_RESULT($glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK)
4354 CXXFLAGS="$ac_save_CXXFLAGS"
4355 LIBS="$ac_save_LIBS"
4360 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
4362 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4366 ac_save_CXXFLAGS="$CXXFLAGS"
4367 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4369 AC_MSG_CHECKING([for hw.ncpu sysctl])
4370 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4371 GCC_TRY_COMPILE_OR_LINK(
4374 #include <sys/sysctl.h>
4378 size_t size = sizeof(count);
4379 int mib[] = { CTL_HW, HW_NCPU };
4380 sysctl(mib, 2, &count, &size, NULL, 0);
4382 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4383 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4385 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4386 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4388 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4390 CXXFLAGS="$ac_save_CXXFLAGS"
4395 dnl Check to see if python pretty printing can be activated.
4397 dnl --with-python-dir=dir
4398 dnl installs directory into $prefix/dir
4399 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4401 AC_MSG_CHECKING([for custom python install directory])
4402 AC_ARG_WITH([python-dir],
4403 AS_HELP_STRING([--with-python-dir],
4404 [the location to install Python modules. This path is relative starting from the prefix.]),
4405 [with_python_dir=$withval], [with_python_dir="no"])
4406 AC_MSG_RESULT(${with_python_dir})
4408 # Needed for installing Python modules during make install.
4409 python_mod_dir="${with_python_dir}"
4410 AC_SUBST(python_mod_dir)
4411 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4415 dnl Check to see if -Werror is disabled.
4417 dnl --enable-werror/--disable-werror
4418 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4419 AC_MSG_CHECKING([for -Werror])
4420 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4421 AC_MSG_RESULT($enable_werror)
4422 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4426 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4427 dnl and define _GLIBCXX_USE_TMPNAM.
4429 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4433 ac_save_CXXFLAGS="$CXXFLAGS"
4434 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4436 AC_MSG_CHECKING([for tmpnam])
4437 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4438 GCC_TRY_COMPILE_OR_LINK(
4439 [#include <stdio.h>],
4440 [char *tmp = tmpnam(NULL);],
4441 [glibcxx_cv_TMPNAM=yes],
4442 [glibcxx_cv_TMPNAM=no])
4444 if test $glibcxx_cv_TMPNAM = yes; then
4445 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4447 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4449 CXXFLAGS="$ac_save_CXXFLAGS"
4454 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4455 dnl Some versions of sdt.h were not compatible with C++11.
4457 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4458 AC_MSG_CHECKING([for suitable sys/sdt.h])
4459 # Note that this test has to be run with the C language.
4460 # Otherwise, sdt.h will try to include some headers from
4464 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4465 # Because we have to run the test in C, we use grep rather
4466 # than the compiler to check for the bug. The bug is that
4467 # were strings without trailing whitespace, causing g++
4468 # to look for operator"". The pattern searches for the fixed
4470 AC_EGREP_CPP([ \",\" ], [
4471 #include <sys/sdt.h>
4472 int f() { STAP_PROBE(hi, bob); }
4473 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4476 if test $glibcxx_cv_sys_sdt_h = yes; then
4477 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4478 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4480 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4484 dnl Control whether the library should define symbols for old and new ABIs.
4485 dnl This affects definitions of strings, stringstreams and locale facets.
4487 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4490 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4492 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4493 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4494 if test x$enable_symvers = xgnu-versioned-namespace; then
4495 # gnu-versioned-namespace is incompatible with the dual ABI.
4496 enable_libstdcxx_dual_abi="no"
4498 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4499 AC_MSG_NOTICE([dual ABI is disabled])
4500 default_libstdcxx_abi="gcc4-compatible"
4502 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4506 dnl Check to see which ABI should be enabled by default.
4508 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4511 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4513 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4514 if test x$enable_libstdcxx_dual_abi = xyes; then
4515 AC_MSG_CHECKING([for default std::string ABI to use])
4516 AC_ARG_WITH([default-libstdcxx-abi],
4517 AS_HELP_STRING([--with-default-libstdcxx-abi],
4518 [set the std::string ABI to use by default]),
4520 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4521 new|cxx11) default_libstdcxx_abi="new" ;;
4522 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4523 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4526 [default_libstdcxx_abi="new"])
4527 AC_MSG_RESULT(${default_libstdcxx_abi})
4529 if test $default_libstdcxx_abi = "new"; then
4536 AC_SUBST(glibcxx_cxx98_abi)
4537 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4541 dnl Check to see whether to build libstdc++fs.a
4543 dnl --enable-libstdcxx-filesystem-ts
4545 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4546 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4547 [turns on ISO/IEC TS 18822 support],
4548 [permit yes|no|auto])
4550 AC_MSG_CHECKING([whether to build Filesystem TS support])
4551 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4552 enable_libstdcxx_filesystem_ts=no
4554 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4555 case "${target_os}" in
4556 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4557 enable_libstdcxx_filesystem_ts=yes
4559 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu | uclinux*)
4560 enable_libstdcxx_filesystem_ts=yes
4563 enable_libstdcxx_filesystem_ts=yes
4566 enable_libstdcxx_filesystem_ts=yes
4569 enable_libstdcxx_filesystem_ts=yes
4572 enable_libstdcxx_filesystem_ts=no
4576 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4577 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4581 dnl Check whether the library calls required by the C++17 Filesystem library
4582 dnl and the Filesystem TS are present.
4584 dnl HAVE_STRUCT_DIRENT_D_TYPE
4585 dnl _GLIBCXX_USE_REALPATH
4586 dnl _GLIBCXX_USE_UTIMENSAT
4587 dnl _GLIBCXX_USE_ST_MTIM
4588 dnl _GLIBCXX_USE_FCHMOD
4589 dnl _GLIBCXX_USE_FCHMODAT
4590 dnl _GLIBCXX_USE_SENDFILE
4595 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4599 ac_save_CXXFLAGS="$CXXFLAGS"
4600 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4602 AC_MSG_CHECKING([for struct dirent.d_type])
4603 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4604 GCC_TRY_COMPILE_OR_LINK(
4605 [#include <dirent.h>],
4608 if (sizeof d.d_type) return 0;
4610 [glibcxx_cv_dirent_d_type=yes],
4611 [glibcxx_cv_dirent_d_type=no])
4613 if test $glibcxx_cv_dirent_d_type = yes; then
4614 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4616 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
4618 AC_MSG_CHECKING([for realpath])
4619 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4620 GCC_TRY_COMPILE_OR_LINK(
4627 #if _XOPEN_VERSION < 500
4629 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4630 char *tmp = realpath((const char*)NULL, (char*)NULL);
4635 [glibcxx_cv_realpath=yes],
4636 [glibcxx_cv_realpath=no])
4638 if test $glibcxx_cv_realpath = yes; then
4639 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4641 AC_MSG_RESULT($glibcxx_cv_realpath)
4643 AC_MSG_CHECKING([for utimensat])
4644 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4645 GCC_TRY_COMPILE_OR_LINK(
4648 #include <sys/stat.h>
4651 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4652 int i = utimensat(AT_FDCWD, "path", ts, 0);
4654 [glibcxx_cv_utimensat=yes],
4655 [glibcxx_cv_utimensat=no])
4657 if test $glibcxx_cv_utimensat = yes; then
4658 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4660 AC_MSG_RESULT($glibcxx_cv_utimensat)
4662 AC_MSG_CHECKING([for utime])
4663 AC_CACHE_VAL(glibcxx_cv_utime, [dnl
4664 GCC_TRY_COMPILE_OR_LINK(
4669 struct utimbuf t = { 1, 1 };
4670 int i = utime("path", &t);
4672 [glibcxx_cv_utime=yes],
4673 [glibcxx_cv_utime=no])
4675 if test $glibcxx_cv_utime = yes; then
4676 AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.])
4678 AC_MSG_RESULT($glibcxx_cv_utime)
4680 AC_MSG_CHECKING([for lstat])
4681 AC_CACHE_VAL(glibcxx_cv_lstat, [dnl
4682 GCC_TRY_COMPILE_OR_LINK(
4683 [ #include <sys/stat.h> ],
4686 int i = lstat("path", &st);
4688 [glibcxx_cv_lstat=yes],
4689 [glibcxx_cv_lstat=no])
4691 if test $glibcxx_cv_lstat = yes; then
4692 AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.])
4694 AC_MSG_RESULT($glibcxx_cv_lstat)
4696 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4697 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4698 GCC_TRY_COMPILE_OR_LINK(
4699 [ #include <sys/stat.h> ],
4702 return st.st_mtim.tv_nsec;
4704 [glibcxx_cv_st_mtim=yes],
4705 [glibcxx_cv_st_mtim=no])
4707 if test $glibcxx_cv_st_mtim = yes; then
4708 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4710 AC_MSG_RESULT($glibcxx_cv_st_mtim)
4712 AC_MSG_CHECKING([for fchmod])
4713 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4714 GCC_TRY_COMPILE_OR_LINK(
4715 [#include <sys/stat.h>],
4716 [fchmod(1, S_IWUSR);],
4717 [glibcxx_cv_fchmod=yes],
4718 [glibcxx_cv_fchmod=no])
4720 if test $glibcxx_cv_fchmod = yes; then
4721 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4723 AC_MSG_RESULT($glibcxx_cv_fchmod)
4725 AC_MSG_CHECKING([for fchmodat])
4726 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4727 GCC_TRY_COMPILE_OR_LINK(
4730 #include <sys/stat.h>
4732 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4733 [glibcxx_cv_fchmodat=yes],
4734 [glibcxx_cv_fchmodat=no])
4736 if test $glibcxx_cv_fchmodat = yes; then
4737 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4739 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4741 AC_MSG_CHECKING([for sendfile that can copy files])
4742 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4743 case "${target_os}" in
4744 gnu* | linux* | solaris* | uclinux*)
4745 GCC_TRY_COMPILE_OR_LINK(
4746 [#include <sys/sendfile.h>],
4747 [sendfile(1, 2, (off_t*)0, sizeof 1);],
4748 [glibcxx_cv_sendfile=yes],
4749 [glibcxx_cv_sendfile=no])
4752 glibcxx_cv_sendfile=no
4756 if test $glibcxx_cv_sendfile = yes; then
4757 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.])
4759 AC_MSG_RESULT($glibcxx_cv_sendfile)
4761 AC_MSG_CHECKING([for link])
4762 AC_CACHE_VAL(glibcxx_cv_link, [dnl
4763 GCC_TRY_COMPILE_OR_LINK(
4764 [#include <unistd.h>],
4766 [glibcxx_cv_link=yes],
4767 [glibcxx_cv_link=no])
4769 if test $glibcxx_cv_link = yes; then
4770 AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.])
4772 AC_MSG_RESULT($glibcxx_cv_link)
4774 AC_MSG_CHECKING([for readlink])
4775 AC_CACHE_VAL(glibcxx_cv_readlink, [dnl
4776 GCC_TRY_COMPILE_OR_LINK(
4777 [#include <unistd.h>],
4778 [char buf[32]; readlink("", buf, sizeof(buf));],
4779 [glibcxx_cv_readlink=yes],
4780 [glibcxx_cv_readlink=no])
4782 if test $glibcxx_cv_readlink = yes; then
4783 AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.])
4785 AC_MSG_RESULT($glibcxx_cv_readlink)
4787 AC_MSG_CHECKING([for symlink])
4788 AC_CACHE_VAL(glibcxx_cv_symlink, [dnl
4789 GCC_TRY_COMPILE_OR_LINK(
4790 [#include <unistd.h>],
4792 [glibcxx_cv_symlink=yes],
4793 [glibcxx_cv_symlink=no])
4795 if test $glibcxx_cv_symlink = yes; then
4796 AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.])
4798 AC_MSG_RESULT($glibcxx_cv_symlink)
4800 AC_MSG_CHECKING([for truncate])
4801 AC_CACHE_VAL(glibcxx_cv_truncate, [dnl
4802 GCC_TRY_COMPILE_OR_LINK(
4803 [#include <unistd.h>],
4804 [truncate("", 99);],
4805 [glibcxx_cv_truncate=yes],
4806 [glibcxx_cv_truncate=no])
4808 if test $glibcxx_cv_truncate = yes; then
4809 AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.])
4811 AC_MSG_RESULT($glibcxx_cv_truncate)
4813 CXXFLAGS="$ac_save_CXXFLAGS"
4818 dnl Check how size_t is mangled. Copied from libitm.
4820 AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4821 AC_CACHE_CHECK([how size_t is mangled],
4822 glibcxx_cv_size_t_mangling, [
4823 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4824 [glibcxx_cv_size_t_mangling=m], [
4825 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4826 [glibcxx_cv_size_t_mangling=j], [
4828 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4829 [glibcxx_cv_size_t_mangling=y], [
4831 [extern __SIZE_TYPE__ x; extern unsigned short x;],
4832 [glibcxx_cv_size_t_mangling=t], [
4834 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;],
4835 [glibcxx_cv_size_t_mangling=u6uint20],
4836 [glibcxx_cv_size_t_mangling=x])
4842 if test $glibcxx_cv_size_t_mangling = x; then
4843 AC_MSG_ERROR([Unknown underlying type for size_t])
4845 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4846 [Define to the letter to which size_t is mangled.])
4850 dnl Determine whether std::exception_ptr symbols should be exported with
4851 dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which
4852 dnl release first added support for std::exception_ptr. Originally it was
4853 dnl only supported for targets with always-lock-free atomics for int, but
4854 dnl since GCC 7.1 it is supported for all targets.
4856 AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [
4857 if test $enable_symvers != no; then
4858 AC_MSG_CHECKING([for first version to support std::exception_ptr])
4860 aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \
4861 m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* )
4862 ac_exception_ptr_since_gcc46=yes
4865 # If the value of this macro changes then we will need to hardcode
4866 # yes/no here for additional targets based on the original value.
4867 AC_TRY_COMPILE([], [
4868 #if __GCC_ATOMIC_INT_LOCK_FREE <= 1
4869 # error atomic int not always lock free
4872 [ac_exception_ptr_since_gcc46=yes],
4873 [ac_exception_ptr_since_gcc46=no])
4876 if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then
4877 AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1,
4878 [Define to 1 if GCC 4.6 supported std::exception_ptr for the target])
4879 AC_MSG_RESULT([4.6.0])
4881 AC_MSG_RESULT([7.1.0])
4886 # Macros from the top-level gcc directory.
4887 m4_include([../config/gc++filt.m4])
4888 m4_include([../config/tls.m4])
4889 m4_include([../config/gthr.m4])
4890 m4_include([../config/cet.m4])