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 $host.
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_builddir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ python src src/c++98 src/c++11 doc po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
63 toplevel_builddir=${glibcxx_builddir}/..
64 toplevel_srcdir=${glibcxx_srcdir}/..
65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
67 AC_SUBST(toplevel_builddir)
68 AC_SUBST(toplevel_srcdir)
70 # We use these options to decide which functions to include. They are
71 # set from the top level.
72 AC_ARG_WITH([target-subdir],
73 AC_HELP_STRING([--with-target-subdir=SUBDIR],
74 [configuring in a subdirectory]))
76 AC_ARG_WITH([cross-host],
77 AC_HELP_STRING([--with-cross-host=HOST],
78 [configuring with a cross compiler]))
81 AC_HELP_STRING([--with-newlib],
82 [assume newlib as a system C library]))
84 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
85 # available). Uncomment the next line to force a particular method.
91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
95 # Set up safe default values for all subsequent AM_CONDITIONAL tests
96 # which are themselves conditionally expanded.
97 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
98 ## other macros from doing the same. This should be automated.) -pme
100 # Check for C library flavor since GNU/Linux platforms use different
101 # configuration directories depending on the C library in use.
102 AC_EGREP_CPP([_using_uclibc], [
107 ], uclibc=yes, uclibc=no)
109 AC_EGREP_CPP([_using_bionic], [
114 ], bionic=yes, bionic=no)
116 # Find platform-specific directories containing configuration info.
117 # Also possibly modify flags used elsewhere, as needed by the platform.
123 dnl Tests for newer compiler features, or features that are present in newer
124 dnl compiler versions but not older compiler versions still in use, should
128 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
129 dnl new inlining code or the new system_header pragma will die on -Werror.
130 dnl Leave it out by default and use maint-mode to use it.
131 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
132 dnl compiler supports it and the user has not requested debug mode.
134 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
135 # All these tests are for C++; save the language and the compiler flags.
136 # The CXXFLAGS thing is suspicious, but based on similar bits previously
137 # found in GLIBCXX_CONFIGURE.
140 ac_test_CXXFLAGS="${CXXFLAGS+set}"
141 ac_save_CXXFLAGS="$CXXFLAGS"
143 # Check for maintainer-mode bits.
144 if test x"$USE_MAINTAINER_MODE" = xno; then
150 # Check for -ffunction-sections -fdata-sections
151 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
152 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
153 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
154 if test "$ac_test_CXXFLAGS" = set; then
155 CXXFLAGS="$ac_save_CXXFLAGS"
157 # this is the suspicious part
160 if test x"$ac_fdsections" = x"yes"; then
161 SECTION_FLAGS='-ffunction-sections -fdata-sections'
163 AC_MSG_RESULT($ac_fdsections)
167 AC_SUBST(SECTION_FLAGS)
172 dnl Check if the assembler used supports disabling generation of hardware
173 dnl capabilities. This is only supported by Sun as at the moment.
176 dnl HWCAP_FLAGS='-Wa,-nH' if possible.
178 AC_DEFUN([GLIBCXX_CHECK_ASSEMBLER_HWCAP], [
179 test -z "$HWCAP_FLAGS" && HWCAP_FLAGS=''
181 # Restrict the test to Solaris, other assemblers (e.g. AIX as) have -nH
182 # with a different meaning.
185 ac_save_CFLAGS="$CFLAGS"
186 CFLAGS="$CFLAGS -Wa,-nH"
188 AC_MSG_CHECKING([for as that supports -Wa,-nH])
189 AC_TRY_COMPILE([], [return 0;], [ac_hwcap_flags=yes],[ac_hwcap_flags=no])
190 if test "$ac_hwcap_flags" = "yes"; then
191 HWCAP_FLAGS="-Wa,-nH $HWCAP_FLAGS"
193 AC_MSG_RESULT($ac_hwcap_flags)
195 CFLAGS="$ac_save_CFLAGS"
199 AC_SUBST(HWCAP_FLAGS)
204 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
205 dnl the native linker is in use, all variables will be defined to something
206 dnl safe (like an empty string).
209 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
210 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
211 dnl LD (as a side effect of testing)
214 dnl glibcxx_ld_is_gold (set to "no" or "yes")
215 dnl glibcxx_gnu_ld_version (possibly)
217 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
218 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
220 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
221 # If we're not using GNU ld, then there's no point in even trying these
222 # tests. Check for that first. We should have already tested for gld
223 # by now (in libtool), but require it now just to be safe...
224 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
225 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
226 AC_REQUIRE([AC_PROG_LD])
227 AC_REQUIRE([AC_PROG_AWK])
229 # The name set by libtool depends on the version of libtool. Shame on us
230 # for depending on an impl detail, but c'est la vie. Older versions used
231 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
232 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
233 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
234 # set (hence we're using an older libtool), then set it.
235 if test x${with_gnu_ld+set} != xset; then
236 if test x${ac_cv_prog_gnu_ld+set} != xset; then
237 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
240 with_gnu_ld=$ac_cv_prog_gnu_ld
244 # Start by getting the version number. I think the libtool test already
245 # does some of this, but throws away the result.
246 glibcxx_ld_is_gold=no
247 if test x"$with_gnu_ld" = x"yes"; then
248 AC_MSG_CHECKING([for ld version])
250 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
251 glibcxx_ld_is_gold=yes
253 ldver=`$LD --version 2>/dev/null |
254 sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'`
256 glibcxx_gnu_ld_version=`echo $ldver | \
257 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
258 AC_MSG_RESULT($glibcxx_gnu_ld_version)
262 glibcxx_have_gc_sections=no
263 if test "$glibcxx_ld_is_gold" = "yes"; then
264 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
265 glibcxx_have_gc_sections=yes
268 glibcxx_gcsections_min_ld=21602
269 if test x"$with_gnu_ld" = x"yes" &&
270 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
271 glibcxx_have_gc_sections=yes
274 if test "$glibcxx_have_gc_sections" = "yes"; then
275 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
276 # NB: This flag only works reliably after 2.16.1. Configure tests
277 # for this are difficult, so hard wire a value that should work.
279 ac_test_CFLAGS="${CFLAGS+set}"
280 ac_save_CFLAGS="$CFLAGS"
281 CFLAGS='-Wl,--gc-sections'
283 # Check for -Wl,--gc-sections
284 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
285 AC_TRY_LINK([ int one(void) { return 1; }
286 int two(void) { return 2; }
287 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
288 if test "$ac_gcsections" = "yes"; then
291 if $CC -c conftest.c; then
292 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
293 grep "Warning: gc-sections option ignored" > /dev/null; then
297 rm -f conftest.c conftest.o conftest
299 if test "$ac_gcsections" = "yes"; then
300 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
302 AC_MSG_RESULT($ac_gcsections)
304 if test "$ac_test_CFLAGS" = set; then
305 CFLAGS="$ac_save_CFLAGS"
307 # this is the suspicious part
313 # Note this is only for shared objects.
315 if test x"$with_gnu_ld" = x"yes"; then
316 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
317 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
318 if test -n "$cxx_z_relo"; then
319 OPT_LDFLAGS="-Wl,-z,relro"
322 AC_MSG_RESULT($ac_ld_relro)
325 # Set linker optimization flags.
326 if test x"$with_gnu_ld" = x"yes"; then
327 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
330 AC_SUBST(SECTION_LDFLAGS)
331 AC_SUBST(OPT_LDFLAGS)
336 dnl Check for headers for, and arguments to, the setrlimit() function.
337 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
340 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
341 dnl various HAVE_LIMIT_* for individual limit names
343 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
344 AC_MSG_CHECKING([for RLIMIT_$1])
347 #include <sys/time.h>
348 #include <sys/resource.h>
350 [ int f = RLIMIT_$1 ; ],
351 [glibcxx_mresult=1], [glibcxx_mresult=0])
352 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
353 [Only used in build directory testsuite_hooks.h.])
354 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
358 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
359 setrlimit_have_headers=yes
360 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
362 [setrlimit_have_headers=no])
363 # If don't have the headers, then we can't run the tests now, and we
364 # won't be seeing any of these during testsuite compilation.
365 if test $setrlimit_have_headers = yes; then
366 # Can't do these in a loop, else the resulting syntax is wrong.
367 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
368 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
369 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
370 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
371 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
373 # Check for rlimit, setrlimit.
374 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
377 #include <sys/time.h>
378 #include <sys/resource.h>
382 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
386 AC_MSG_CHECKING([for testsuite resource limits support])
387 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
389 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
390 [Define if using setrlimit to set resource limits during
395 AC_MSG_RESULT($ac_res_limits)
400 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
401 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
403 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
407 ac_save_CXXFLAGS="$CXXFLAGS"
408 CXXFLAGS="$CXXFLAGS -fno-exceptions"
410 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
411 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
412 GCC_TRY_COMPILE_OR_LINK(
413 [#include <sys/stat.h>],
416 S_ISREG(buffer.st_mode);],
417 [glibcxx_cv_S_ISREG=yes],
418 [glibcxx_cv_S_ISREG=no])
420 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
421 GCC_TRY_COMPILE_OR_LINK(
422 [#include <sys/stat.h>],
425 S_IFREG & buffer.st_mode;],
426 [glibcxx_cv_S_IFREG=yes],
427 [glibcxx_cv_S_IFREG=no])
430 if test $glibcxx_cv_S_ISREG = yes; then
431 AC_DEFINE(HAVE_S_ISREG, 1,
432 [Define if S_IFREG is available in <sys/stat.h>.])
434 elif test $glibcxx_cv_S_IFREG = yes; then
435 AC_DEFINE(HAVE_S_IFREG, 1,
436 [Define if S_IFREG is available in <sys/stat.h>.])
441 CXXFLAGS="$ac_save_CXXFLAGS"
447 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
449 AC_DEFUN([GLIBCXX_CHECK_POLL], [
453 ac_save_CXXFLAGS="$CXXFLAGS"
454 CXXFLAGS="$CXXFLAGS -fno-exceptions"
456 AC_MSG_CHECKING([for poll])
457 AC_CACHE_VAL(glibcxx_cv_POLL, [
458 GCC_TRY_COMPILE_OR_LINK(
460 [struct pollfd pfd[1];
461 pfd[0].events = POLLIN;
463 [glibcxx_cv_POLL=yes],
464 [glibcxx_cv_POLL=no])
466 if test $glibcxx_cv_POLL = yes; then
467 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
469 AC_MSG_RESULT($glibcxx_cv_POLL)
471 CXXFLAGS="$ac_save_CXXFLAGS"
477 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
479 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
483 ac_save_CXXFLAGS="$CXXFLAGS"
484 CXXFLAGS="$CXXFLAGS -fno-exceptions"
486 AC_MSG_CHECKING([for writev])
487 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
488 GCC_TRY_COMPILE_OR_LINK(
489 [#include <sys/uio.h>],
490 [struct iovec iov[2];
492 [glibcxx_cv_WRITEV=yes],
493 [glibcxx_cv_WRITEV=no])
495 if test $glibcxx_cv_WRITEV = yes; then
496 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
498 AC_MSG_RESULT($glibcxx_cv_WRITEV)
500 CXXFLAGS="$ac_save_CXXFLAGS"
506 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
507 dnl Also check whether int64_t is actually a typedef to long or long long.
509 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
514 AC_MSG_CHECKING([for int64_t])
515 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
517 [#include <stdint.h>],
519 [glibcxx_cv_INT64_T=yes],
520 [glibcxx_cv_INT64_T=no])
523 if test $glibcxx_cv_INT64_T = yes; then
524 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
525 AC_MSG_RESULT($glibcxx_cv_INT64_T)
527 AC_MSG_CHECKING([for int64_t as long])
528 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
531 template<typename, typename> struct same { enum { value = -1 }; };
532 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
533 int array[same<int64_t, long>::value];], [],
534 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
537 if test $glibcxx_cv_int64_t_long = yes; then
538 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
539 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
542 AC_MSG_CHECKING([for int64_t as long long])
543 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
546 template<typename, typename> struct same { enum { value = -1 }; };
547 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
548 int array[same<int64_t, long long>::value];], [],
549 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
552 if test $glibcxx_cv_int64_t_long_long = yes; then
553 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
554 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
563 dnl Check whether LFS support is available.
565 AC_DEFUN([GLIBCXX_CHECK_LFS], [
568 ac_save_CXXFLAGS="$CXXFLAGS"
569 CXXFLAGS="$CXXFLAGS -fno-exceptions"
570 AC_MSG_CHECKING([for LFS support])
571 AC_CACHE_VAL(glibcxx_cv_LFS, [
572 GCC_TRY_COMPILE_OR_LINK(
575 #include <sys/stat.h>
579 fseeko64(fp, 0, SEEK_CUR);
581 lseek64(1, 0, SEEK_CUR);
584 [glibcxx_cv_LFS=yes],
587 if test $glibcxx_cv_LFS = yes; then
588 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
590 AC_MSG_RESULT($glibcxx_cv_LFS)
591 CXXFLAGS="$ac_save_CXXFLAGS"
597 dnl Check for whether a fully dynamic basic_string implementation should
598 dnl be turned on, that does not put empty objects in per-process static
599 dnl memory (mostly useful together with shared memory allocators, see PR
600 dnl libstdc++/16612 for details).
602 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
603 dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
604 dnl otherwise undefined
605 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
606 dnl Where DEFAULT is either `yes' or `no'.
608 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
609 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
610 if test $enable_fully_dynamic_string = yes; then
611 enable_fully_dynamic_string_def=1
613 enable_fully_dynamic_string_def=0
615 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
616 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
621 dnl Does any necessary configuration of the testsuite directory. Generates
622 dnl the testsuite_hooks.h header.
624 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
628 dnl GLIBCXX_TEST_WCHAR_T
629 dnl GLIBCXX_TEST_THREAD
632 dnl baseline_subdir_switch
634 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
635 if $GLIBCXX_IS_NATIVE ; then
636 # Do checks for resource limit functions.
637 GLIBCXX_CHECK_SETRLIMIT
639 # Look for setenv, so that extended locale tests can be performed.
640 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
643 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
644 test $enable_symvers != no; then
647 enable_abi_check=no ;;
649 enable_abi_check=yes ;;
652 # Only build this as native, since automake does not understand
657 # Export file names for ABI checking.
658 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
659 AC_SUBST(baseline_dir)
660 baseline_subdir_switch="$abi_baseline_subdir_switch"
661 AC_SUBST(baseline_subdir_switch)
666 dnl Does any necessary configuration for docbook in the docs directory.
668 dnl XSLTPROC must be set before this
671 dnl glibcxx_stylesheets
675 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
677 AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
678 glibcxx_stylesheets=no
679 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude http://docbook.sourceforge.net/release/xsl-ns/current/xhtml-1_1/docbook.xsl - 2>/dev/null; then
680 glibcxx_stylesheets=yes
682 AC_MSG_RESULT($glibcxx_stylesheets)
684 AC_MSG_CHECKING([for local stylesheet directory])
685 glibcxx_local_stylesheets=no
686 if test x"$glibcxx_stylesheets" = x"yes"; then
687 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then
688 glibcxx_local_stylesheets=yes
689 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets
691 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then
692 glibcxx_local_stylesheets=yes
693 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
695 if test -d /usr/share/xml/docbook/stylesheet/nwalsh5/current; then
696 glibcxx_local_stylesheets=yes
697 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/nwalsh5/current
700 AC_MSG_RESULT($glibcxx_local_stylesheets)
702 if test x"$glibcxx_local_stylesheets" = x"yes"; then
703 AC_SUBST(XSL_STYLE_DIR)
704 AC_MSG_NOTICE($XSL_STYLE_DIR)
706 glibcxx_stylesheets=no
709 # Check for epub3 dependencies.
710 AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
711 glibcxx_epub_stylesheets=no
712 if test x"$glibcxx_local_stylesheets" = x"yes"; then
713 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
714 glibcxx_epub_stylesheets=yes
717 AC_MSG_RESULT($glibcxx_epub_stylesheets)
718 AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
724 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
728 dnl TOPLEVEL_INCLUDES
730 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
731 # Used for every C++ compile we perform.
733 -I$glibcxx_builddir/include/$host_alias \
734 -I$glibcxx_builddir/include \
735 -I$glibcxx_srcdir/libsupc++"
737 # For Canadian crosses, pick this up too.
738 if test $CANADIAN = yes; then
739 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
742 # Stuff in the actual top level. Currently only used by libsupc++ to
743 # get unwind* headers from the libgcc dir.
744 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
745 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
747 # Now, export this to all the little Makefiles....
748 AC_SUBST(GLIBCXX_INCLUDES)
749 AC_SUBST(TOPLEVEL_INCLUDES)
754 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
755 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
758 dnl OPTIMIZE_CXXFLAGS
761 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
762 # Optimization flags that are probably a good idea for thrill-seekers. Just
763 # uncomment the lines below and make, everything else is ready to go...
764 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
765 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
766 AC_SUBST(OPTIMIZE_CXXFLAGS)
768 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi'
774 dnl All installation directory information is determined here.
778 dnl glibcxx_prefixdir
779 dnl glibcxx_toolexecdir
780 dnl glibcxx_toolexeclibdir
782 dnl Assumes cross_compiling bits already done, and with_cross_host in
785 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
786 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
787 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
788 glibcxx_toolexecdir=no
789 glibcxx_toolexeclibdir=no
790 glibcxx_prefixdir=$prefix
792 AC_MSG_CHECKING([for gxx-include-dir])
793 AC_ARG_WITH([gxx-include-dir],
794 AC_HELP_STRING([--with-gxx-include-dir=DIR],
795 [installation directory for include files]),
797 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
798 no) gxx_include_dir=no ;;
799 *) gxx_include_dir=$withval ;;
801 [gxx_include_dir=no])
802 AC_MSG_RESULT($gxx_include_dir)
804 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
805 AC_ARG_ENABLE([version-specific-runtime-libs],
806 AC_HELP_STRING([--enable-version-specific-runtime-libs],
807 [Specify that runtime libraries should be installed in a compiler-specific directory]),
808 [case "$enableval" in
809 yes) version_specific_libs=yes ;;
810 no) version_specific_libs=no ;;
811 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
813 [version_specific_libs=no])
814 AC_MSG_RESULT($version_specific_libs)
816 # Default case for install directory for include files.
817 if test $version_specific_libs = no && test $gxx_include_dir = no; then
818 gxx_include_dir='include/c++/${gcc_version}'
819 if test -n "$with_cross_host" &&
820 test x"$with_cross_host" != x"no"; then
821 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
823 gxx_include_dir='${prefix}/'"$gxx_include_dir"
827 # Version-specific runtime libs processing.
828 if test $version_specific_libs = yes; then
829 # Need the gcc compiler version to know where to install libraries
830 # and header files if --enable-version-specific-runtime-libs option
831 # is selected. FIXME: these variables are misnamed, there are
832 # no executables installed in _toolexecdir or _toolexeclibdir.
833 if test x"$gxx_include_dir" = x"no"; then
834 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
836 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
837 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
840 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
841 # Install a library built with a cross compiler in tooldir, not libdir.
842 if test x"$glibcxx_toolexecdir" = x"no"; then
843 if test -n "$with_cross_host" &&
844 test x"$with_cross_host" != x"no"; then
845 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
846 glibcxx_toolexeclibdir='${toolexecdir}/lib'
848 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
849 glibcxx_toolexeclibdir='${libdir}'
851 multi_os_directory=`$CXX -print-multi-os-directory`
852 case $multi_os_directory in
853 .) ;; # Avoid trailing /.
854 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
858 AC_MSG_CHECKING([for install location])
859 AC_MSG_RESULT($gxx_include_dir)
861 AC_SUBST(glibcxx_prefixdir)
862 AC_SUBST(gxx_include_dir)
863 AC_SUBST(glibcxx_toolexecdir)
864 AC_SUBST(glibcxx_toolexeclibdir)
870 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
871 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
872 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
874 dnl See docs/html/17_intro/configury.html#enable for documentation.
876 m4_define([GLIBCXX_ENABLE],[dnl
877 m4_define([_g_switch],[--enable-$1])dnl
878 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
879 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
884 m4_bpatsubst([$5],[permit ])) ;;
885 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
886 dnl Idea for future: generate a URL pointing to
887 dnl "onlinedocs/configopts.html#whatever"
894 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
898 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
899 m4_undefine([_g_switch])dnl
900 m4_undefine([_g_help])dnl
905 dnl Check for ISO/IEC 9899:1999 "C99" support.
907 dnl --enable-c99 defines _GLIBCXX_USE_C99
908 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
909 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
910 dnl Where DEFAULT is either `yes' or `no'.
911 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
913 AC_DEFUN([GLIBCXX_ENABLE_C99], [
914 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
916 if test x"$enable_c99" = x"yes"; then
921 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
922 # undefined and fake C99 facilities - like pre-standard snprintf - may be
923 # spuriously enabled.
924 # Long term, -std=c++0x could be even better, could manage to explicitely
925 # request C99 facilities to the underlying C headers.
926 ac_save_CXXFLAGS="$CXXFLAGS"
927 CXXFLAGS="$CXXFLAGS -std=c++98"
929 ac_save_gcc_no_link="$gcc_no_link"
931 if test x$gcc_no_link != xyes; then
932 # Use -fno-exceptions to that the C driver can link these tests without
933 # hitting undefined references to personality routines.
934 CXXFLAGS="$CXXFLAGS -fno-exceptions"
935 AC_CHECK_LIB(m, sin, [
938 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
943 # Check for the existence of <math.h> functions used if C99 is enabled.
944 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
945 AC_CACHE_VAL(glibcxx_cv_c99_math, [
946 GCC_TRY_COMPILE_OR_LINK(
948 volatile double d1, d2;
956 i = isgreater(d1, d2);
957 i = isgreaterequal(d1, d2);
959 i = islessequal(d1, d2);
960 i = islessgreater(d1, d2);
961 i = islessgreater(d1, d2);
962 i = isunordered(d1, d2);
963 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
965 AC_MSG_RESULT($glibcxx_cv_c99_math)
966 if test x"$glibcxx_cv_c99_math" = x"yes"; then
967 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
968 [Define if C99 functions or macros in <math.h> should be imported
969 in <cmath> in namespace std.])
972 # Check for the existence of <complex.h> complex math functions.
973 # This is necessary even though libstdc++ uses the builtin versions
974 # of these functions, because if the builtin cannot be used, a reference
975 # to the library function is emitted.
976 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
977 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
978 glibcxx_cv_c99_complex=no;
979 if test x"$ac_has_complex_h" = x"yes"; then
980 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
981 GCC_TRY_COMPILE_OR_LINK(
982 [#include <complex.h>
983 typedef __complex__ float float_type;
984 typedef __complex__ double double_type;
985 typedef __complex__ long double ld_type;
986 volatile float_type tmpf;
987 volatile double_type tmpd;
988 volatile ld_type tmpld;
991 volatile long double ld;],
1000 tmpf = csqrtf(tmpf);
1002 tmpf = ctanhf(tmpf);
1003 tmpf = cpowf(tmpf, tmpf);
1004 tmpf = cprojf(tmpf);
1016 tmpd = cpow(tmpd, tmpd);
1020 tmpld = ccosl(tmpld);
1021 tmpld = ccoshl(tmpld);
1022 tmpld = cexpl(tmpld);
1023 tmpld = clogl(tmpld);
1024 tmpld = csinl(tmpld);
1025 tmpld = csinhl(tmpld);
1026 tmpld = csqrtl(tmpld);
1027 tmpld = ctanl(tmpld);
1028 tmpld = ctanhl(tmpld);
1029 tmpld = cpowl(tmpld, tmpld);
1030 tmpld = cprojl(tmpld);
1031 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
1033 AC_MSG_RESULT($glibcxx_cv_c99_complex)
1034 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
1035 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
1036 [Define if C99 functions in <complex.h> should be used in
1037 <complex>. Using compiler builtins for these functions requires
1038 corresponding C99 library functions to be present.])
1041 # Check for the existence in <stdio.h> of vscanf, et. al.
1042 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1043 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
1044 GCC_TRY_COMPILE_OR_LINK(
1047 void foo(char* fmt, ...)
1049 va_list args; va_start(args, fmt);
1050 vfscanf(stderr, "%i", args);
1052 vsnprintf(fmt, 0, "%i", args);
1053 vsscanf(fmt, "%i", args);
1055 [snprintf("12", 0, "%i");],
1056 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
1058 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
1060 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1061 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1062 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
1063 GCC_TRY_COMPILE_OR_LINK(
1064 [#include <stdlib.h>
1066 volatile long double ld;
1067 volatile unsigned long long ll;
1070 f = strtof("gnu", &tmp);
1071 ld = strtold("gnu", &tmp);
1072 ll = strtoll("gnu", &tmp, 10);
1073 ll = strtoull("gnu", &tmp, 10);
1075 mydivt = lldiv(10,1);
1080 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
1082 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
1084 # Check for the existence in <wchar.h> of wcstold, etc.
1085 glibcxx_cv_c99_wchar=no;
1086 if test x"$ac_has_wchar_h" = xyes &&
1087 test x"$ac_has_wctype_h" = xyes; then
1088 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1089 AC_TRY_COMPILE([#include <wchar.h>
1096 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
1098 # Checks for wide character functions that may not be present.
1099 # Injection of these is wrapped with guard macros.
1100 # NB: only put functions here, instead of immediately above, if
1101 # absolutely necessary.
1102 AC_TRY_COMPILE([#include <wchar.h>
1103 namespace test { using ::vfwscanf; } ], [],
1104 [AC_DEFINE(HAVE_VFWSCANF,1,
1105 [Defined if vfwscanf exists.])],[])
1107 AC_TRY_COMPILE([#include <wchar.h>
1108 namespace test { using ::vswscanf; } ], [],
1109 [AC_DEFINE(HAVE_VSWSCANF,1,
1110 [Defined if vswscanf exists.])],[])
1112 AC_TRY_COMPILE([#include <wchar.h>
1113 namespace test { using ::vwscanf; } ], [],
1114 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1116 AC_TRY_COMPILE([#include <wchar.h>
1117 namespace test { using ::wcstof; } ], [],
1118 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1120 AC_TRY_COMPILE([#include <wctype.h>],
1121 [ wint_t t; int i = iswblank(t);],
1122 [AC_DEFINE(HAVE_ISWBLANK,1,
1123 [Defined if iswblank exists.])],[])
1125 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1128 # Option parsed, now set things appropriately.
1129 if test x"$glibcxx_cv_c99_math" = x"no" ||
1130 test x"$glibcxx_cv_c99_complex" = x"no" ||
1131 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1132 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1133 test x"$glibcxx_cv_c99_wchar" = 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="$ac_save_CXXFLAGS"
1147 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1148 AC_MSG_RESULT($enable_c99)
1153 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1154 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1155 dnl in the C++11 standard.
1157 dnl --enable-libstdcxx-time
1158 dnl --enable-libstdcxx-time=yes
1159 dnl checks for the availability of monotonic and realtime clocks,
1160 dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1161 dnl links in the latter.
1162 dnl --enable-libstdcxx-time=rt
1163 dnl also searches (and, if needed, links) librt. Note that this is
1164 dnl not always desirable because, in glibc, for example, in turn it
1165 dnl triggers the linking of libpthread too, which activates locking,
1166 dnl a large overhead for single-thread programs.
1167 dnl --enable-libstdcxx-time=no
1168 dnl --disable-libstdcxx-time
1169 dnl disables the checks completely
1171 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1172 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1173 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1174 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1176 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1178 AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
1179 GLIBCXX_ENABLE(libstdcxx-time,$1,[[[=KIND]]],
1180 [use KIND for check type],
1185 ac_save_CXXFLAGS="$CXXFLAGS"
1186 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1187 ac_save_LIBS="$LIBS"
1189 ac_has_clock_monotonic=no
1190 ac_has_clock_realtime=no
1191 AC_MSG_RESULT($enable_libstdcxx_time)
1193 if test x"$enable_libstdcxx_time" != x"no"; then
1195 if test x"$enable_libstdcxx_time" = x"rt"; then
1196 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1197 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1199 AC_SEARCH_LIBS(clock_gettime, [posix4])
1200 AC_SEARCH_LIBS(nanosleep, [posix4])
1203 case "$ac_cv_search_clock_gettime" in
1204 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1207 case "$ac_cv_search_nanosleep" in
1208 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1212 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1214 case "$ac_cv_search_sched_yield" in
1216 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1217 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1218 [ Defined if sched_yield is available. ])
1221 if test x"$enable_libstdcxx_time" = x"rt"; then
1222 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1223 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1224 [ Defined if sched_yield is available. ])
1228 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1229 [ Defined if sched_yield is available. ])
1233 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1235 if test x"$ac_has_unistd_h" = x"yes"; then
1236 AC_MSG_CHECKING([for monotonic clock])
1238 [#include <unistd.h>
1241 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1244 clock_gettime(CLOCK_MONOTONIC, &tp);
1245 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1247 AC_MSG_RESULT($ac_has_clock_monotonic)
1249 AC_MSG_CHECKING([for realtime clock])
1251 [#include <unistd.h>
1254 [#if _POSIX_TIMERS > 0
1257 clock_gettime(CLOCK_REALTIME, &tp);
1258 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1260 AC_MSG_RESULT($ac_has_clock_realtime)
1262 AC_MSG_CHECKING([for nanosleep])
1264 [#include <unistd.h>
1267 [#if _POSIX_TIMERS > 0
1271 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1273 AC_MSG_RESULT($ac_has_nanosleep)
1277 if test x"$ac_has_clock_monotonic" != x"yes"; then
1278 case ${target_os} in
1280 AC_MSG_CHECKING([for clock_gettime syscall])
1282 [#include <unistd.h>
1284 #include <sys/syscall.h>
1286 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1289 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1290 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1291 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
1292 AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
1293 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
1294 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1295 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1296 ac_has_clock_monotonic=yes
1297 ac_has_clock_realtime=yes
1302 if test x"$ac_has_clock_monotonic" = x"yes"; then
1303 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1304 [ Defined if clock_gettime has monotonic clock support. ])
1307 if test x"$ac_has_clock_realtime" = x"yes"; then
1308 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1309 [ Defined if clock_gettime has realtime clock support. ])
1312 if test x"$ac_has_nanosleep" = x"yes"; then
1313 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1314 [ Defined if nanosleep is available. ])
1316 AC_MSG_CHECKING([for sleep])
1317 AC_TRY_COMPILE([#include <unistd.h>],
1319 [ac_has_sleep=yes],[ac_has_sleep=no])
1320 if test x"$ac_has_sleep" = x"yes"; then
1321 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1323 AC_MSG_RESULT($ac_has_sleep)
1324 AC_MSG_CHECKING([for usleep])
1325 AC_TRY_COMPILE([#include <unistd.h>],
1328 [ac_has_usleep=yes],[ac_has_usleep=no])
1329 if test x"$ac_has_usleep" = x"yes"; then
1330 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1332 AC_MSG_RESULT($ac_has_usleep)
1335 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1336 AC_MSG_CHECKING([for Sleep])
1337 AC_TRY_COMPILE([#include <windows.h>],
1339 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1340 if test x"$ac_has_win32_sleep" = x"yes"; then
1341 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1343 AC_MSG_RESULT($ac_has_win32_sleep)
1346 AC_SUBST(GLIBCXX_LIBS)
1348 CXXFLAGS="$ac_save_CXXFLAGS"
1349 LIBS="$ac_save_LIBS"
1354 dnl Check for gettimeofday, used in the implementation of 20.11.7
1355 dnl [time.clock] in the C++11 standard.
1357 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1359 AC_MSG_CHECKING([for gettimeofday])
1363 ac_save_CXXFLAGS="$CXXFLAGS"
1364 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1366 ac_has_gettimeofday=no;
1367 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1368 if test x"$ac_has_sys_time_h" = x"yes"; then
1369 AC_MSG_CHECKING([for gettimeofday])
1370 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1371 [timeval tv; gettimeofday(&tv, 0);],
1372 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1374 AC_MSG_RESULT($ac_has_gettimeofday)
1377 if test x"$ac_has_gettimeofday" = x"yes"; then
1378 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1379 [ Defined if gettimeofday is available. ])
1382 CXXFLAGS="$ac_save_CXXFLAGS"
1387 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1388 dnl facilities in Chapter 8, "C compatibility".
1390 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1395 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1396 # undefined and fake C99 facilities may be spuriously enabled.
1397 ac_save_CXXFLAGS="$CXXFLAGS"
1398 CXXFLAGS="$CXXFLAGS -std=c++98"
1400 # Check for the existence of <complex.h> complex math functions used
1402 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1403 ac_c99_complex_tr1=no;
1404 if test x"$ac_has_complex_h" = x"yes"; then
1405 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1406 AC_TRY_COMPILE([#include <complex.h>],
1407 [typedef __complex__ float float_type; float_type tmpf;
1414 typedef __complex__ double double_type; double_type tmpd;
1421 typedef __complex__ long double ld_type; ld_type tmpld;
1428 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1430 AC_MSG_RESULT($ac_c99_complex_tr1)
1431 if test x"$ac_c99_complex_tr1" = x"yes"; then
1432 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1433 [Define if C99 functions in <complex.h> should be used in
1434 <tr1/complex>. Using compiler builtins for these functions
1435 requires corresponding C99 library functions to be present.])
1438 # Check for the existence of <ctype.h> functions.
1439 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1440 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1441 AC_TRY_COMPILE([#include <ctype.h>],
1445 ],[glibcxx_cv_c99_ctype_tr1=yes],
1446 [glibcxx_cv_c99_ctype_tr1=no])
1448 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1449 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1450 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1451 [Define if C99 functions in <ctype.h> should be imported in
1452 <tr1/cctype> in namespace std::tr1.])
1455 # Check for the existence of <fenv.h> functions.
1456 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1458 if test x"$ac_has_fenv_h" = x"yes"; then
1459 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1460 AC_TRY_COMPILE([#include <fenv.h>],
1465 ret = feclearexcept(except);
1466 ret = fegetexceptflag(pflag, except);
1467 ret = feraiseexcept(except);
1468 ret = fesetexceptflag(pflag, except);
1469 ret = fetestexcept(except);
1471 ret = fesetround(mode);
1472 ret = fegetenv(penv);
1473 ret = feholdexcept(penv);
1474 ret = fesetenv(penv);
1475 ret = feupdateenv(penv);
1476 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1478 AC_MSG_RESULT($ac_c99_fenv_tr1)
1479 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1480 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1481 [Define if C99 functions in <fenv.h> should be imported in
1482 <tr1/cfenv> in namespace std::tr1.])
1485 # Check for the existence of <stdint.h> types.
1486 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1487 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1488 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1489 #define __STDC_CONSTANT_MACROS
1490 #include <stdint.h>],
1491 [typedef int8_t my_int8_t;
1492 my_int8_t i8 = INT8_MIN;
1494 typedef int16_t my_int16_t;
1495 my_int16_t i16 = INT16_MIN;
1497 typedef int32_t my_int32_t;
1498 my_int32_t i32 = INT32_MIN;
1500 typedef int64_t my_int64_t;
1501 my_int64_t i64 = INT64_MIN;
1503 typedef int_fast8_t my_int_fast8_t;
1504 my_int_fast8_t if8 = INT_FAST8_MIN;
1505 if8 = INT_FAST8_MAX;
1506 typedef int_fast16_t my_int_fast16_t;
1507 my_int_fast16_t if16 = INT_FAST16_MIN;
1508 if16 = INT_FAST16_MAX;
1509 typedef int_fast32_t my_int_fast32_t;
1510 my_int_fast32_t if32 = INT_FAST32_MIN;
1511 if32 = INT_FAST32_MAX;
1512 typedef int_fast64_t my_int_fast64_t;
1513 my_int_fast64_t if64 = INT_FAST64_MIN;
1514 if64 = INT_FAST64_MAX;
1515 typedef int_least8_t my_int_least8_t;
1516 my_int_least8_t il8 = INT_LEAST8_MIN;
1517 il8 = INT_LEAST8_MAX;
1518 typedef int_least16_t my_int_least16_t;
1519 my_int_least16_t il16 = INT_LEAST16_MIN;
1520 il16 = INT_LEAST16_MAX;
1521 typedef int_least32_t my_int_least32_t;
1522 my_int_least32_t il32 = INT_LEAST32_MIN;
1523 il32 = INT_LEAST32_MAX;
1524 typedef int_least64_t my_int_least64_t;
1525 my_int_least64_t il64 = INT_LEAST64_MIN;
1526 il64 = INT_LEAST64_MAX;
1527 typedef intmax_t my_intmax_t;
1528 my_intmax_t im = INTMAX_MAX;
1530 typedef intptr_t my_intptr_t;
1531 my_intptr_t ip = INTPTR_MAX;
1533 typedef uint8_t my_uint8_t;
1534 my_uint8_t ui8 = UINT8_MAX;
1536 typedef uint16_t my_uint16_t;
1537 my_uint16_t ui16 = UINT16_MAX;
1539 typedef uint32_t my_uint32_t;
1540 my_uint32_t ui32 = UINT32_MAX;
1542 typedef uint64_t my_uint64_t;
1543 my_uint64_t ui64 = UINT64_MAX;
1545 typedef uint_fast8_t my_uint_fast8_t;
1546 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1547 uif8 = UINT_FAST8_MAX;
1548 typedef uint_fast16_t my_uint_fast16_t;
1549 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1550 uif16 = UINT_FAST16_MAX;
1551 typedef uint_fast32_t my_uint_fast32_t;
1552 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1553 uif32 = UINT_FAST32_MAX;
1554 typedef uint_fast64_t my_uint_fast64_t;
1555 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1556 uif64 = UINT_FAST64_MAX;
1557 typedef uint_least8_t my_uint_least8_t;
1558 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1559 uil8 = UINT_LEAST8_MAX;
1560 typedef uint_least16_t my_uint_least16_t;
1561 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1562 uil16 = UINT_LEAST16_MAX;
1563 typedef uint_least32_t my_uint_least32_t;
1564 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1565 uil32 = UINT_LEAST32_MAX;
1566 typedef uint_least64_t my_uint_least64_t;
1567 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1568 uil64 = UINT_LEAST64_MAX;
1569 typedef uintmax_t my_uintmax_t;
1570 my_uintmax_t uim = UINTMAX_MAX;
1572 typedef uintptr_t my_uintptr_t;
1573 my_uintptr_t uip = UINTPTR_MAX;
1575 ],[glibcxx_cv_c99_stdint_tr1=yes],
1576 [glibcxx_cv_c99_stdint_tr1=no])
1578 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1579 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1580 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1581 [Define if C99 types in <stdint.h> should be imported in
1582 <tr1/cstdint> in namespace std::tr1.])
1585 # Check for the existence of <math.h> functions.
1586 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1587 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1588 AC_TRY_COMPILE([#include <math.h>],
1589 [typedef double_t my_double_t;
1590 typedef float_t my_float_t;
1604 copysignf(0.0f, 0.0f);
1605 copysignl(0.0l, 0.0l);
1622 fmaf(0.0f, 0.0f, 0.0f);
1623 fmal(0.0l, 0.0l, 0.0l);
1666 nextafter(0.0, 0.0);
1667 nextafterf(0.0f, 0.0f);
1668 nextafterl(0.0l, 0.0l);
1669 nexttoward(0.0, 0.0);
1670 nexttowardf(0.0f, 0.0f);
1671 nexttowardl(0.0l, 0.0l);
1672 remainder(0.0, 0.0);
1673 remainderf(0.0f, 0.0f);
1674 remainderl(0.0l, 0.0l);
1675 remquo(0.0, 0.0, 0);
1676 remquof(0.0f, 0.0f, 0);
1677 remquol(0.0l, 0.0l, 0);
1696 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1698 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1699 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1700 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1701 [Define if C99 functions or macros in <math.h> should be imported
1702 in <tr1/cmath> in namespace std::tr1.])
1705 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1706 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1707 ac_c99_inttypes_tr1=no;
1708 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1709 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1710 AC_TRY_COMPILE([#include <inttypes.h>],
1711 [intmax_t i, numer, denom, base;
1714 intmax_t ret = imaxabs(i);
1715 imaxdiv_t dret = imaxdiv(numer, denom);
1716 ret = strtoimax(s, endptr, base);
1717 uintmax_t uret = strtoumax(s, endptr, base);
1718 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1720 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1721 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1722 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1723 [Define if C99 functions in <inttypes.h> should be imported in
1724 <tr1/cinttypes> in namespace std::tr1.])
1727 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't
1728 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1729 ac_c99_inttypes_wchar_t_tr1=no;
1730 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1731 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1732 AC_TRY_COMPILE([#include <inttypes.h>],
1736 intmax_t ret = wcstoimax(s, endptr, base);
1737 uintmax_t uret = wcstoumax(s, endptr, base);
1738 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1739 [ac_c99_inttypes_wchar_t_tr1=no])
1741 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1742 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1743 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1744 [Define if wchar_t C99 functions in <inttypes.h> should be
1745 imported in <tr1/cinttypes> in namespace std::tr1.])
1748 # Check for the existence of the <stdbool.h> header.
1749 AC_CHECK_HEADERS(stdbool.h)
1751 # Check for the existence of the <stdalign.h> header.
1752 AC_CHECK_HEADERS(stdalign.h)
1754 CXXFLAGS="$ac_save_CXXFLAGS"
1759 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1760 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1762 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1764 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1765 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1766 if test -r /dev/random && test -r /dev/urandom; then
1767 ## For MSys environment the test above is detect as false-positive
1768 ## on mingw-targets. So disable it explicit for them.
1769 case ${target_os} in
1770 *mingw*) glibcxx_cv_random_tr1=no ;;
1771 *) glibcxx_cv_random_tr1=yes ;;
1774 glibcxx_cv_random_tr1=no;
1777 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1779 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1780 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1781 [Define if /dev/random and /dev/urandom are available for
1782 the random_device of TR1 (Chapter 5.1).])
1788 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
1790 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
1792 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
1793 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
1794 [#include <stdio.h>],
1795 [AC_MSG_ERROR([computing EOF failed])])
1797 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
1798 [Define to the value of the EOF integer constant.])
1800 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
1801 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
1802 [#include <stdio.h>],
1803 [AC_MSG_ERROR([computing SEEK_CUR failed])])
1805 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
1806 [Define to the value of the SEEK_CUR integer constant.])
1808 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
1809 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
1810 [#include <stdio.h>],
1811 [AC_MSG_ERROR([computing SEEK_END failed])])
1813 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
1814 [Define to the value of the SEEK_END integer constant.])
1818 dnl Check whether required C++ overloads are present in <stdio.h>.
1820 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
1825 AC_MSG_CHECKING([for gets declaration])
1826 AC_CACHE_VAL(glibcxx_cv_gets, [
1827 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1834 [glibcxx_cv_gets=yes],
1835 [glibcxx_cv_gets=no]
1838 if test $glibcxx_cv_gets = yes; then
1839 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
1841 AC_MSG_RESULT($glibcxx_cv_gets)
1847 dnl Check whether macros, etc are present for <system_error>
1849 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1851 m4_pushdef([n_syserr], [1])dnl
1852 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1853 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1854 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
1855 ECHILD, ENOSPC, EPERM,
1856 ETIMEDOUT, EWOULDBLOCK],
1857 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1858 AC_MSG_CHECKING([for syserr])
1859 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1860 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1861 [int i = syserr;])],
1862 [glibcxx_cv_system_error[]n_syserr=yes],
1863 [glibcxx_cv_system_error[]n_syserr=no])
1865 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1866 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1867 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1869 m4_define([n_syserr], m4_incr(n_syserr))dnl
1870 m4_popdef([SYSERR])dnl
1872 m4_popdef([n_syserr])dnl
1876 dnl Check for what type of C headers to use.
1878 dnl --enable-cheaders= [does stuff].
1879 dnl --disable-cheaders [does not do anything, really].
1880 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1881 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1883 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1884 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
1885 [construct "C" headers for g++], [permit c|c_std|c_global])
1886 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1888 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1890 # Allow overrides to configure.host here.
1891 if test $enable_cheaders = c_global; then
1895 AC_SUBST(C_INCLUDE_DIR)
1896 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1897 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1898 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1899 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1904 dnl Check for which locale library to use. The choice is mapped to
1905 dnl a subdirectory of config/locale.
1907 dnl Default is generic.
1909 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1910 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
1911 [use MODEL for target locale package],
1912 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
1914 # Deal with gettext issues. Default to not using it (=no) until we detect
1915 # support for it later. Let the user turn it off via --e/d, but let that
1916 # default to on for easier handling.
1919 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1923 # Either a known package, or "auto"
1924 if test $enable_clocale = no || test $enable_clocale = yes; then
1927 enable_clocale_flag=$enable_clocale
1929 # Probe for locale model to use if none specified.
1930 # Default to "generic".
1931 if test $enable_clocale_flag = auto; then
1932 case ${target_os} in
1933 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1934 enable_clocale_flag=gnu
1937 enable_clocale_flag=darwin
1940 enable_clocale_flag=newlib
1943 if test x"$with_newlib" = x"yes"; then
1944 enable_clocale_flag=newlib
1946 enable_clocale_flag=generic
1952 # Sanity check model, and test for special functionality.
1953 if test $enable_clocale_flag = gnu; then
1954 AC_EGREP_CPP([_GLIBCXX_ok], [
1955 #include <features.h>
1956 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
1959 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1961 # Set it to scream when it hurts.
1962 ac_save_CFLAGS="$CFLAGS"
1963 CFLAGS="-Wimplicit-function-declaration -Werror"
1965 # Use strxfrm_l if available.
1966 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1968 #include <locale.h>],
1969 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1970 AC_DEFINE(HAVE_STRXFRM_L, 1,
1971 [Define if strxfrm_l is available in <string.h>.]),)
1973 # Use strerror_l if available.
1974 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1976 #include <locale.h>],
1977 [__locale_t loc; strerror_l(5, loc);],
1978 AC_DEFINE(HAVE_STRERROR_L, 1,
1979 [Define if strerror_l is available in <string.h>.]),)
1981 CFLAGS="$ac_save_CFLAGS"
1984 # Perhaps use strerror_r if available, and strerror_l isn't.
1985 ac_save_CFLAGS="$CFLAGS"
1986 CFLAGS="-Wimplicit-function-declaration -Werror"
1987 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1989 #include <locale.h>],
1990 [char s[128]; strerror_r(5, s, 128);],
1991 AC_DEFINE(HAVE_STRERROR_R, 1,
1992 [Define if strerror_r is available in <string.h>.]),)
1993 CFLAGS="$ac_save_CFLAGS"
1995 # Set configure bits for specified locale package
1996 AC_MSG_CHECKING([for C locale to use])
1997 case ${enable_clocale_flag} in
1999 AC_MSG_RESULT(generic)
2001 CLOCALE_H=config/locale/generic/c_locale.h
2002 CLOCALE_CC=config/locale/generic/c_locale.cc
2003 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2004 CCOLLATE_CC=config/locale/generic/collate_members.cc
2005 CCTYPE_CC=config/locale/generic/ctype_members.cc
2006 CMESSAGES_H=config/locale/generic/messages_members.h
2007 CMESSAGES_CC=config/locale/generic/messages_members.cc
2008 CMONEY_CC=config/locale/generic/monetary_members.cc
2009 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2010 CTIME_H=config/locale/generic/time_members.h
2011 CTIME_CC=config/locale/generic/time_members.cc
2012 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2015 AC_MSG_RESULT(darwin or freebsd)
2017 CLOCALE_H=config/locale/generic/c_locale.h
2018 CLOCALE_CC=config/locale/generic/c_locale.cc
2019 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2020 CCOLLATE_CC=config/locale/generic/collate_members.cc
2021 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2022 CMESSAGES_H=config/locale/generic/messages_members.h
2023 CMESSAGES_CC=config/locale/generic/messages_members.cc
2024 CMONEY_CC=config/locale/generic/monetary_members.cc
2025 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2026 CTIME_H=config/locale/generic/time_members.h
2027 CTIME_CC=config/locale/generic/time_members.cc
2028 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2034 # Declare intention to use gettext, and add support for specific
2036 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2039 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2040 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2041 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2044 # Export the build objects.
2045 for ling in $ALL_LINGUAS; do \
2046 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2047 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2049 AC_SUBST(glibcxx_MOFILES)
2050 AC_SUBST(glibcxx_POFILES)
2052 CLOCALE_H=config/locale/gnu/c_locale.h
2053 CLOCALE_CC=config/locale/gnu/c_locale.cc
2054 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2055 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2056 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2057 CMESSAGES_H=config/locale/gnu/messages_members.h
2058 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2059 CMONEY_CC=config/locale/gnu/monetary_members.cc
2060 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2061 CTIME_H=config/locale/gnu/time_members.h
2062 CTIME_CC=config/locale/gnu/time_members.cc
2063 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2066 AC_MSG_RESULT(IEEE 1003.1)
2068 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2069 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2070 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2071 CCOLLATE_CC=config/locale/generic/collate_members.cc
2072 CCTYPE_CC=config/locale/generic/ctype_members.cc
2073 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2074 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2075 CMONEY_CC=config/locale/generic/monetary_members.cc
2076 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2077 CTIME_H=config/locale/generic/time_members.h
2078 CTIME_CC=config/locale/generic/time_members.cc
2079 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2082 AC_MSG_RESULT(newlib)
2084 CLOCALE_H=config/locale/generic/c_locale.h
2085 CLOCALE_CC=config/locale/generic/c_locale.cc
2086 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2087 CCOLLATE_CC=config/locale/generic/collate_members.cc
2088 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2089 CMESSAGES_H=config/locale/generic/messages_members.h
2090 CMESSAGES_CC=config/locale/generic/messages_members.cc
2091 CMONEY_CC=config/locale/generic/monetary_members.cc
2092 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2093 CTIME_H=config/locale/generic/time_members.h
2094 CTIME_CC=config/locale/generic/time_members.cc
2095 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2099 # This is where the testsuite looks for locale catalogs, using the
2100 # -DLOCALEDIR define during testsuite compilation.
2101 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2102 AC_SUBST(glibcxx_localedir)
2104 # A standalone libintl (e.g., GNU libintl) may be in use.
2105 if test $USE_NLS = yes; then
2106 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2107 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2109 if test $USE_NLS = yes; then
2110 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2111 [Define if NLS translations are to be used.])
2116 AC_SUBST(CMESSAGES_H)
2117 AC_SUBST(CCODECVT_CC)
2118 AC_SUBST(CCOLLATE_CC)
2120 AC_SUBST(CMESSAGES_CC)
2122 AC_SUBST(CNUMERIC_CC)
2125 AC_SUBST(CLOCALE_CC)
2126 AC_SUBST(CLOCALE_INTERNAL_H)
2131 dnl Check for which std::allocator base class to use. The choice is
2132 dnl mapped from a subdirectory of include/ext.
2136 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2137 AC_MSG_CHECKING([for std::allocator base class])
2138 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2139 [use KIND for target std::allocator base],
2140 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2142 # If they didn't use this option switch, or if they specified --enable
2143 # with no specific model, we'll have to look for one. If they
2144 # specified --disable (???), do likewise.
2145 if test $enable_libstdcxx_allocator = no ||
2146 test $enable_libstdcxx_allocator = yes;
2148 enable_libstdcxx_allocator=auto
2151 # Either a known package, or "auto". Auto implies the default choice
2152 # for a particular platform.
2153 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2155 # Probe for host-specific support if no specific model is specified.
2157 if test $enable_libstdcxx_allocator_flag = auto; then
2158 case ${target_os} in
2159 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2160 enable_libstdcxx_allocator_flag=new
2163 enable_libstdcxx_allocator_flag=new
2167 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2170 # Set configure bits for specified locale package
2171 case ${enable_libstdcxx_allocator_flag} in
2173 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2174 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2177 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2178 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2181 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2182 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2185 ALLOCATOR_H=config/allocator/new_allocator_base.h
2186 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2189 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2190 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2194 AC_SUBST(ALLOCATOR_H)
2195 AC_SUBST(ALLOCATOR_NAME)
2200 dnl Check for whether the Boost-derived checks should be turned on.
2202 dnl --enable-concept-checks turns them on.
2203 dnl --disable-concept-checks leaves them off.
2204 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2205 dnl Where DEFAULT is either `yes' or `no'.
2207 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2208 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2209 if test $enable_concept_checks = yes; then
2210 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2211 [Define to use concept checking code from the boost libraries.])
2216 dnl Use extern templates.
2218 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2219 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2221 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2222 dnl Where DEFAULT is `yes' or `no'.
2224 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2226 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2228 AC_MSG_CHECKING([for extern template support])
2229 AC_MSG_RESULT([$enable_extern_template])
2231 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2235 dnl Check for parallel mode pre-requisites, including OpenMP support.
2237 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2239 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2243 # See if configured libgomp/omp.h exists. (libgomp may be in
2244 # noconfigdirs but not explicitly disabled.)
2245 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2246 enable_parallel=yes;
2248 AC_MSG_NOTICE([target-libgomp not built])
2251 AC_MSG_CHECKING([for parallel mode support])
2252 AC_MSG_RESULT([$enable_parallel])
2257 dnl Check for which I/O library to use: stdio, or something specific.
2259 dnl Default is stdio.
2261 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2262 AC_MSG_CHECKING([for underlying I/O to use])
2263 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2264 [use target-specific I/O package], [permit stdio])
2266 # Now that libio has been removed, you can have any color you want as long
2267 # as it's black. This is one big no-op until other packages are added, but
2268 # showing the framework never hurts.
2269 case ${enable_cstdio} in
2271 CSTDIO_H=config/io/c_io_stdio.h
2272 BASIC_FILE_H=config/io/basic_file_stdio.h
2273 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2274 AC_MSG_RESULT(stdio)
2279 AC_SUBST(BASIC_FILE_H)
2280 AC_SUBST(BASIC_FILE_CC)
2285 dnl Check for "unusual" flags to pass to the compiler while building.
2287 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2288 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2289 dnl --disable-cxx-flags passes nothing.
2290 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2291 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2292 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2293 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2294 dnl If "default flags" is an empty string, the effect is the same
2295 dnl as --disable or --enable=no.
2297 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2298 AC_MSG_CHECKING([for extra compiler flags for building])
2299 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2300 [pass compiler FLAGS when building library],
2301 [case "x$enable_cxx_flags" in
2302 xno | x) enable_cxx_flags= ;;
2304 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2307 # Run through flags (either default or command-line) and set anything
2308 # extra (e.g., #defines) that must accompany particular g++ options.
2309 if test -n "$enable_cxx_flags"; then
2310 for f in $enable_cxx_flags; do
2314 *) # and we're trying to pass /what/ exactly?
2315 AC_MSG_ERROR([compiler flags start with a -]) ;;
2320 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2321 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2322 AC_SUBST(EXTRA_CXX_FLAGS)
2327 dnl Check to see if debugging libraries are to be built.
2329 dnl --enable-libstdcxx-debug
2330 dnl builds a separate set of debugging libraries in addition to the
2331 dnl normal (shared, static) libstdc++ binaries.
2333 dnl --disable-libstdcxx-debug
2334 dnl builds only one (non-debug) version of libstdc++.
2336 dnl --enable-libstdcxx-debug-flags=FLAGS
2337 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2339 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2340 dnl Where DEFAULT is either `yes' or `no'.
2342 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2343 AC_MSG_CHECKING([for additional debug build])
2344 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2345 AC_MSG_RESULT($enable_libstdcxx_debug)
2346 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2351 dnl Check for explicit debug flags.
2353 dnl --enable-libstdcxx-debug-flags='-O1'
2354 dnl is a general method for passing flags to be used when
2355 dnl building debug libraries with --enable-debug.
2357 dnl --disable-libstdcxx-debug-flags does nothing.
2358 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2359 dnl If "default flags" is an empty string, the effect is the same
2360 dnl as --disable or --enable=no.
2362 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2363 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2364 [pass compiler FLAGS when building debug library],
2365 [case "x$enable_libstdcxx_debug_flags" in
2366 xno | x) enable_libstdcxx_debug_flags= ;;
2368 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2371 # Option parsed, now set things appropriately
2372 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2373 AC_SUBST(DEBUG_FLAGS)
2375 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2380 dnl Check if the user only wants a freestanding library implementation.
2382 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2383 dnl installing only the headers required by [17.4.1.3] and the language
2384 dnl support library. More than that will be built (to keep the Makefiles
2385 dnl conveniently clean), but not installed.
2388 dnl is_hosted (yes/no)
2391 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2393 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2394 AC_ARG_ENABLE([hosted-libstdcxx],
2395 AC_HELP_STRING([--disable-hosted-libstdcxx],
2396 [only build freestanding C++ runtime support]),,
2399 enable_hosted_libstdcxx=no
2402 enable_hosted_libstdcxx=yes
2405 if test "$enable_hosted_libstdcxx" = no; then
2406 AC_MSG_NOTICE([Only freestanding libraries will be built])
2410 enable_libstdcxx_pch=no
2415 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2416 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2417 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2422 dnl Check if the user wants a non-verbose library implementation.
2424 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2425 dnl standard error on termination.
2428 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2430 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2431 AC_ARG_ENABLE([libstdcxx-verbose],
2432 AC_HELP_STRING([--disable-libstdcxx-verbose],
2433 [disable termination messages to standard error]),,
2434 [enable_libstdcxx_verbose=yes])
2435 if test x"$enable_libstdcxx_verbose" = xyes; then
2438 AC_MSG_NOTICE([verbose termination messages are disabled])
2441 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2442 [Define to 1 if a verbose library is built, or 0 otherwise.])
2447 dnl Check for template specializations for the 'long long' type.
2448 dnl The result determines only whether 'long long' I/O is enabled; things
2449 dnl like numeric_limits<> specializations are always available.
2451 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2452 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2453 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2454 dnl Where DEFAULT is either `yes' or `no'.
2456 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2457 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2458 if test $enable_long_long = yes; then
2459 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2460 [Define if code specialized for long long should be used.])
2462 AC_MSG_CHECKING([for enabled long long specializations])
2463 AC_MSG_RESULT([$enable_long_long])
2468 dnl Check for decimal floating point.
2470 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2472 dnl This checks to see if the host supports decimal floating point types.
2475 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2477 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2479 # Fake what AC_TRY_COMPILE does, without linking as this is
2480 # unnecessary for this test.
2482 cat > conftest.$ac_ext << EOF
2483 [#]line __oline__ "configure"
2493 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2494 if AC_TRY_EVAL(ac_compile); then
2495 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2496 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2501 AC_MSG_RESULT($enable_dfp)
2506 dnl Check for GNU 128-bit integer and floating point types.
2508 dnl Note: also checks that the types aren't standard types.
2511 dnl _GLIBCXX_USE_INT128
2512 dnl _GLIBCXX_USE_FLOAT128
2514 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2519 # Fake what AC_TRY_COMPILE does, without linking as this is
2520 # unnecessary for this test.
2522 cat > conftest.$ac_ext << EOF
2523 [#]line __oline__ "configure"
2524 template<typename T1, typename T2>
2526 { typedef T2 type; };
2528 template<typename T>
2533 typename same<long, __int128>::type i1;
2534 typename same<long long, __int128>::type i2;
2538 AC_MSG_CHECKING([for __int128])
2539 if AC_TRY_EVAL(ac_compile); then
2540 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2541 [Define if __int128 is supported on this host.])
2546 AC_MSG_RESULT($enable_int128)
2549 cat > conftest.$ac_ext << EOF
2550 [#]line __oline__ "configure"
2551 template<typename T1, typename T2>
2553 { typedef T2 type; };
2555 template<typename T>
2560 typename same<double, __float128>::type f1;
2561 typename same<long double, __float128>::type f2;
2565 AC_MSG_CHECKING([for __float128])
2566 if AC_TRY_EVAL(ac_compile); then
2567 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
2568 [Define if __float128 is supported on this host.])
2573 AC_MSG_RESULT($enable_float128)
2580 dnl Check for template specializations for the 'wchar_t' type.
2582 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2583 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2584 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2585 dnl Where DEFAULT is either `yes' or `no'.
2587 dnl Necessary support must also be present.
2589 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2590 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2592 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2593 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2594 AC_MSG_CHECKING([for mbstate_t])
2595 AC_TRY_COMPILE([#include <wchar.h>],
2596 [mbstate_t teststate;],
2597 have_mbstate_t=yes, have_mbstate_t=no)
2598 AC_MSG_RESULT($have_mbstate_t)
2599 if test x"$have_mbstate_t" = xyes; then
2600 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2603 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2605 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2607 if test x"$enable_wchar_t" = x"yes"; then
2612 if test x"$ac_has_wchar_h" = xyes &&
2613 test x"$ac_has_wctype_h" = xyes; then
2614 AC_TRY_COMPILE([#include <wchar.h>
2675 ],[],[], [enable_wchar_t=no])
2683 if test x"$enable_wchar_t" = x"yes"; then
2684 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2685 [Define if code specialized for wchar_t should be used.])
2688 AC_MSG_CHECKING([for enabled wchar_t specializations])
2689 AC_MSG_RESULT([$enable_wchar_t])
2694 dnl Check to see if building and using a C++ precompiled header can be done.
2696 dnl --enable-libstdcxx-pch=yes
2697 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2698 dnl may work, after some light-hearted attempts to puzzle out compiler
2699 dnl support, flip bits on in include/Makefile.am
2701 dnl --disable-libstdcxx-pch
2702 dnl turns off attempts to use or build stdc++.h.gch.
2705 dnl glibcxx_PCHFLAGS
2707 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2708 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2709 if test $enable_libstdcxx_pch = yes; then
2710 AC_CACHE_CHECK([for compiler with PCH support],
2711 [glibcxx_cv_prog_CXX_pch],
2712 [ac_save_CXXFLAGS="$CXXFLAGS"
2713 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2716 echo '#include <math.h>' > conftest.h
2717 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2718 -o conftest.h.gch 1>&5 2>&1 &&
2719 echo '#error "pch failed"' > conftest.h &&
2720 echo '#include "conftest.h"' > conftest.cc &&
2721 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2723 glibcxx_cv_prog_CXX_pch=yes
2725 glibcxx_cv_prog_CXX_pch=no
2728 CXXFLAGS=$ac_save_CXXFLAGS
2731 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2734 AC_MSG_CHECKING([for enabled PCH])
2735 AC_MSG_RESULT([$enable_libstdcxx_pch])
2737 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2738 if test $enable_libstdcxx_pch = yes; then
2739 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2743 AC_SUBST(glibcxx_PCHFLAGS)
2748 dnl Check for atomic builtins.
2750 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
2752 dnl This checks to see if the host supports the compiler-generated
2753 dnl builtins for atomic operations for various integral sizes. Note, this
2754 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2755 dnl that are used should be checked.
2758 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
2760 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2763 old_CXXFLAGS="$CXXFLAGS"
2765 # Do link tests if possible, instead asm tests, limited to some platforms
2766 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
2767 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
2768 atomic_builtins_link_tests=no
2769 if test x$gcc_no_link != xyes; then
2770 # Can do link tests. Limit to some tested platforms
2772 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
2773 atomic_builtins_link_tests=yes
2778 if test x$atomic_builtins_link_tests = xyes; then
2782 CXXFLAGS="$CXXFLAGS -fno-exceptions"
2784 AC_MSG_CHECKING([for atomic builtins for bool])
2785 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
2788 [typedef bool atomic_type;
2792 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2793 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2795 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2796 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2798 [glibcxx_cv_atomic_bool=yes],
2799 [glibcxx_cv_atomic_bool=no])
2801 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2803 AC_MSG_CHECKING([for atomic builtins for short])
2804 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
2807 [typedef short atomic_type;
2811 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2812 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2814 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2815 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2817 [glibcxx_cv_atomic_short=yes],
2818 [glibcxx_cv_atomic_short=no])
2820 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2822 AC_MSG_CHECKING([for atomic builtins for int])
2823 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
2826 [typedef int atomic_type;
2830 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2831 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2833 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2834 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2836 [glibcxx_cv_atomic_int=yes],
2837 [glibcxx_cv_atomic_int=no])
2839 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2841 AC_MSG_CHECKING([for atomic builtins for long long])
2842 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
2845 [typedef long long atomic_type;
2849 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2850 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2852 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2853 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2855 [glibcxx_cv_atomic_long_long=yes],
2856 [glibcxx_cv_atomic_long_long=no])
2858 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2864 # Compile unoptimized.
2867 # Fake what AC_TRY_COMPILE does.
2869 cat > conftest.$ac_ext << EOF
2870 [#]line __oline__ "configure"
2873 typedef bool atomic_type;
2877 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2878 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2880 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2881 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2887 AC_MSG_CHECKING([for atomic builtins for bool])
2888 if AC_TRY_EVAL(ac_compile); then
2889 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2890 glibcxx_cv_atomic_bool=no
2892 glibcxx_cv_atomic_bool=yes
2895 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2898 cat > conftest.$ac_ext << EOF
2899 [#]line __oline__ "configure"
2902 typedef short atomic_type;
2906 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2907 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2909 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2910 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2916 AC_MSG_CHECKING([for atomic builtins for short])
2917 if AC_TRY_EVAL(ac_compile); then
2918 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2919 glibcxx_cv_atomic_short=no
2921 glibcxx_cv_atomic_short=yes
2924 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2927 cat > conftest.$ac_ext << EOF
2928 [#]line __oline__ "configure"
2931 // NB: _Atomic_word not necessarily int.
2932 typedef int atomic_type;
2936 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2937 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2939 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2940 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2946 AC_MSG_CHECKING([for atomic builtins for int])
2947 if AC_TRY_EVAL(ac_compile); then
2948 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2949 glibcxx_cv_atomic_int=no
2951 glibcxx_cv_atomic_int=yes
2954 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2957 cat > conftest.$ac_ext << EOF
2958 [#]line __oline__ "configure"
2961 typedef long long atomic_type;
2965 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2966 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2968 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2969 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2975 AC_MSG_CHECKING([for atomic builtins for long long])
2976 if AC_TRY_EVAL(ac_compile); then
2977 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2978 glibcxx_cv_atomic_long_long=no
2980 glibcxx_cv_atomic_long_long=yes
2983 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2988 CXXFLAGS="$old_CXXFLAGS"
2991 # Set atomicity_dir to builtins if all but the long long test above passes.
2992 if test $glibcxx_cv_atomic_bool = yes \
2993 && test $glibcxx_cv_atomic_short = yes \
2994 && test $glibcxx_cv_atomic_int = yes; then
2995 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2996 [Define if the compiler supports C++11 atomics.])
2997 atomicity_dir=cpu/generic/atomicity_builtins
3000 # If still generic, set to mutex.
3001 if test $atomicity_dir = "cpu/generic" ; then
3002 atomicity_dir=cpu/generic/atomicity_mutex
3003 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3004 if test "x$target_thread_file" = xsingle; then
3005 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3006 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3008 AC_MSG_WARN([They will be faked using a mutex.])
3009 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3017 dnl Check for exception handling support. If an explicit enable/disable
3018 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
3019 dnl target may or may not support call frame exceptions.
3021 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
3022 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
3023 dnl Neither one forces an attempt at detection.
3026 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
3028 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
3029 AC_MSG_CHECKING([for exception model to use])
3032 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
3033 [force use of builtin_setjmp for exceptions],
3034 [permit yes|no|auto])
3036 if test $enable_sjlj_exceptions = auto; then
3037 # Botheration. Now we've got to detect the exception model. Link tests
3038 # against libgcc.a are problematic since we've not been given proper -L
3039 # bits for single-tree newlib and libgloss.
3041 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
3042 cat > conftest.$ac_ext << EOF
3043 [#]line __oline__ "configure"
3052 old_CXXFLAGS="$CXXFLAGS"
3054 if AC_TRY_EVAL(ac_compile); then
3055 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
3056 enable_sjlj_exceptions=yes
3057 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
3058 enable_sjlj_exceptions=no
3059 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
3060 enable_sjlj_exceptions=no
3063 CXXFLAGS="$old_CXXFLAGS"
3067 # This is a tad weird, for hysterical raisins. We have to map
3068 # enable/disable to two different models.
3069 case $enable_sjlj_exceptions in
3071 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
3072 [Define if the compiler is configured for setjmp/longjmp exceptions.])
3073 ac_exception_model_name=sjlj
3076 ac_exception_model_name="call frame"
3079 AC_MSG_ERROR([unable to detect exception model])
3083 AC_MSG_RESULT($ac_exception_model_name)
3088 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3090 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3091 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3092 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3093 dnl Where DEFAULT is 'yes'.
3095 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3096 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3098 if test x$enable_libstdcxx_visibility = xyes ; then
3099 dnl all hail libgfortran
3100 dnl Check whether the target supports hidden visibility.
3101 AC_CACHE_CHECK([whether the target supports hidden visibility],
3102 glibcxx_cv_have_attribute_visibility, [
3103 save_CFLAGS="$CFLAGS"
3104 CFLAGS="$CFLAGS -Werror"
3105 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3106 [], glibcxx_cv_have_attribute_visibility=yes,
3107 glibcxx_cv_have_attribute_visibility=no)
3108 CFLAGS="$save_CFLAGS"])
3109 if test $glibcxx_cv_have_attribute_visibility = no; then
3110 enable_libstdcxx_visibility=no
3114 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3115 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3120 dnl Add version tags to symbols in shared library (or not), additionally
3121 dnl marking other symbols as private/local (or not).
3123 dnl Sets libtool_VERSION, and determines shared library SONAME.
3125 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3127 dnl --enable-symvers=style adds a version script to the linker call when
3128 dnl creating the shared library. The choice of version script is
3129 dnl controlled by 'style'.
3130 dnl --disable-symvers does not.
3132 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3133 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3134 dnl choose a default style based on linker characteristics. Passing
3135 dnl 'no' disables versioning.
3137 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3139 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3140 [enables symbol versioning of the shared library],
3141 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3143 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3144 # don't know enough about $LD to do tricks...
3145 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3146 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3147 # with extern "C++" in version scripts.
3148 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3150 # Turn a 'yes' into a suitable default.
3151 if test x$enable_symvers = xyes ; then
3152 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3155 if test $with_gnu_ld = yes ; then
3156 case ${target_os} in
3158 enable_symvers=no ;;
3160 enable_symvers=gnu ;;
3163 case ${target_os} in
3165 enable_symvers=darwin ;;
3166 # Sun symbol versioning exists since Solaris 2.5.
3167 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3168 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3169 # version scripts, so disable symbol versioning if none can be
3171 if test -z "$ac_cv_path_CXXFILT"; then
3172 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3173 AC_MSG_WARN([=== no GNU c++filt could be found.])
3174 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3181 enable_symvers=no ;;
3187 # Check to see if 'darwin' or 'darwin-export' can win.
3188 if test x$enable_symvers = xdarwin-export ; then
3189 enable_symvers=darwin
3192 # Check if 'sun' was requested on non-Solaris 2 platforms.
3193 if test x$enable_symvers = xsun ; then
3194 case ${target_os} in
3200 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3201 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3202 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3208 # Check to see if 'gnu' can win.
3209 if test $enable_symvers = gnu ||
3210 test $enable_symvers = gnu-versioned-namespace ||
3211 test $enable_symvers = sun; then
3212 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3213 AC_MSG_CHECKING([for shared libgcc])
3214 ac_save_CFLAGS="$CFLAGS"
3216 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3217 CFLAGS="$ac_save_CFLAGS"
3218 if test $glibcxx_shared_libgcc = no; then
3219 cat > conftest.c <<EOF
3220 int main (void) { return 0; }
3223 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3224 -shared -shared-libgcc -o conftest.so \
3225 conftest.c -v 2>&1 >/dev/null \
3226 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3228 rm -f conftest.c conftest.so
3229 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3230 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3231 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3232 CFLAGS="$ac_save_CFLAGS"
3235 AC_MSG_RESULT($glibcxx_shared_libgcc)
3237 # For GNU ld, we need at least this version. The format is described in
3238 # GLIBCXX_CHECK_LINKER_FEATURES above.
3239 glibcxx_min_gnu_ld_version=21400
3241 # If no shared libgcc, can't win.
3242 if test $glibcxx_shared_libgcc != yes; then
3243 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3244 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3245 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3247 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3248 : All interesting versions of Sun ld support sun style symbol versioning.
3249 elif test $with_gnu_ld != yes ; then
3251 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3252 AC_MSG_WARN([=== you are not using the GNU linker.])
3253 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3255 elif test $glibcxx_ld_is_gold = yes ; then
3256 : All versions of gold support symbol versioning.
3257 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3258 # The right tools, the right setup, but too old. Fallbacks?
3259 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3260 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3261 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3262 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3263 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3268 # For libtool versioning info, format is CURRENT:REVISION:AGE
3269 libtool_VERSION=6:18:0
3271 # Everything parsed; figure out what files and settings to use.
3272 case $enable_symvers in
3274 SYMVER_FILE=config/abi/pre/none.ver
3277 SYMVER_FILE=config/abi/pre/gnu.ver
3278 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3279 [Define to use GNU versioning in the shared library.])
3281 gnu-versioned-namespace)
3282 libtool_VERSION=7:0:0
3283 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3284 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3285 [Define to use GNU namespace versioning in the shared library.])
3288 SYMVER_FILE=config/abi/pre/gnu.ver
3289 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3290 [Define to use darwin versioning in the shared library.])
3293 SYMVER_FILE=config/abi/pre/gnu.ver
3294 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3295 [Define to use Sun versioning in the shared library.])
3299 if test x$enable_symvers != xno ; then
3300 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3301 [Define to use symbol versioning in the shared library.])
3304 AC_CACHE_CHECK([whether the target supports .symver directive],
3305 glibcxx_cv_have_as_symver_directive, [
3306 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3307 [], glibcxx_cv_have_as_symver_directive=yes,
3308 glibcxx_cv_have_as_symver_directive=no)])
3309 if test $glibcxx_cv_have_as_symver_directive = yes; then
3310 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3311 [Define to 1 if the target assembler supports .symver directive.])
3314 AC_SUBST(SYMVER_FILE)
3315 AC_SUBST(port_specific_symbol_files)
3316 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3317 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3318 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3319 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3320 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3321 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3323 if test $enable_symvers != no ; then
3324 case ${target_os} in
3325 # The Solaris 2 runtime linker doesn't support the GNU extension of
3326 # binding the same symbol to different versions
3329 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3331 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3332 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3337 # Now, set up compatibility support, if any.
3338 # In addition, need this to deal with std::size_t mangling in
3339 # src/compatibility.cc. In a perfect world, could use
3340 # typeid(std::size_t).name()[0] to do direct substitution.
3341 AC_MSG_CHECKING([for size_t as unsigned int])
3342 ac_save_CFLAGS="$CFLAGS"
3344 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3345 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3346 CFLAGS=$ac_save_CFLAGS
3347 if test "$glibcxx_size_t_is_i" = yes; then
3348 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3350 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3352 AC_MSG_CHECKING([for ptrdiff_t as int])
3353 ac_save_CFLAGS="$CFLAGS"
3355 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3356 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3357 CFLAGS=$ac_save_CFLAGS
3358 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3359 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3361 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3366 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3367 dnl We must stage the required headers so that they will be installed
3368 dnl with the library (unlike libgcc, the STL implementation is provided
3369 dnl solely within headers). Since we must not inject random user-space
3370 dnl macro names into user-provided C++ code, we first stage into <file>-in
3371 dnl and process to <file> with an output command. The reason for a two-
3372 dnl stage process here is to correctly handle $srcdir!=$objdir without
3373 dnl having to write complex code (the sed commands to clean the macro
3374 dnl namespace are complex and fragile enough as it is). We must also
3375 dnl add a relative path so that -I- is supported properly.
3380 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3381 AC_MSG_CHECKING([for thread model used by GCC])
3382 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3383 AC_MSG_RESULT([$target_thread_file])
3384 GCC_AC_THREAD_HEADER([$target_thread_file])
3389 dnl Check if gthread implementation defines the types and functions
3390 dnl required by the c++0x thread library. Conforming gthread
3391 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3393 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3395 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3396 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3398 if test x$enable_libstdcxx_threads = xauto ||
3399 test x$enable_libstdcxx_threads = xyes; then
3404 ac_save_CXXFLAGS="$CXXFLAGS"
3405 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3406 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3408 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3409 case $target_thread_file in
3411 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3414 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3416 AC_TRY_COMPILE([#include <unistd.h>],
3418 // In case of POSIX threads check _POSIX_TIMEOUTS.
3419 #if (defined(_PTHREADS) \
3420 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3423 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3425 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3426 [Define to 1 if mutex_timedlock is available.])
3428 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3429 else res_mutex_timedlock=no ; fi
3430 AC_MSG_RESULT([$res_mutex_timedlock])
3432 AC_MSG_CHECKING([for gthreads library])
3434 AC_TRY_COMPILE([#include "gthr.h"],
3436 #ifndef __GTHREADS_CXX0X
3439 ], [case $target_os in
3440 # gthreads support breaks symbol versioning on Solaris 9 (PR
3443 if test x$enable_symvers = xno; then
3445 elif test x$enable_libstdcxx_threads = xyes; then
3446 AC_MSG_WARN([You have requested C++11 threads support, but])
3447 AC_MSG_WARN([this breaks symbol versioning.])
3457 [ac_has_gthreads=no])
3462 AC_MSG_RESULT([$ac_has_gthreads])
3464 if test x"$ac_has_gthreads" = x"yes"; then
3465 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3466 [Define if gthreads library is available.])
3469 CXXFLAGS="$ac_save_CXXFLAGS"
3474 # Check whether LC_MESSAGES is available in <locale.h>.
3475 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3477 # This file file be copied and used freely without restrictions. It can
3478 # be used in projects which are not available under the GNU Public License
3479 # but which still want to provide support for the GNU gettext functionality.
3480 # Please note that the actual code is *not* freely available.
3481 AC_DEFUN([AC_LC_MESSAGES], [
3482 AC_CHECK_HEADER(locale.h, [
3483 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3484 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3485 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3486 if test $ac_cv_val_LC_MESSAGES = yes; then
3487 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3488 [Define if LC_MESSAGES is available in <locale.h>.])
3494 dnl Check whether rdrand is supported in the assembler.
3495 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3496 AC_MSG_CHECKING([for rdrand support in assembler])
3497 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3502 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3503 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3506 if test $ac_cv_x86_rdrand = yes; then
3507 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3508 [ Defined if as can handle rdrand. ])
3510 AC_MSG_RESULT($ac_cv_x86_rdrand)
3514 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3516 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3520 ac_save_CXXFLAGS="$CXXFLAGS"
3521 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3523 AC_MSG_CHECKING([for get_nprocs])
3524 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3525 GCC_TRY_COMPILE_OR_LINK(
3526 [#include <sys/sysinfo.h>],
3527 [int n = get_nprocs();],
3528 [glibcxx_cv_GET_NPROCS=yes],
3529 [glibcxx_cv_GET_NPROCS=no])
3531 if test $glibcxx_cv_GET_NPROCS = yes; then
3532 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3534 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3536 CXXFLAGS="$ac_save_CXXFLAGS"
3541 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3543 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3547 ac_save_CXXFLAGS="$CXXFLAGS"
3548 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3550 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3551 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3552 GCC_TRY_COMPILE_OR_LINK(
3553 [#include <unistd.h>],
3554 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3555 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3556 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3558 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3559 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3561 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3563 CXXFLAGS="$ac_save_CXXFLAGS"
3568 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3570 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3574 ac_save_CXXFLAGS="$CXXFLAGS"
3575 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3577 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3578 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3579 GCC_TRY_COMPILE_OR_LINK(
3580 [#include <unistd.h>],
3581 [int n = sysconf(_SC_NPROC_ONLN);],
3582 [glibcxx_cv_SC_NPROC_ONLN=yes],
3583 [glibcxx_cv_SC_NPROC_ONLN=no])
3585 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3586 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3588 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3590 CXXFLAGS="$ac_save_CXXFLAGS"
3595 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3597 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3601 ac_save_CXXFLAGS="$CXXFLAGS"
3602 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3604 AC_MSG_CHECKING([for pthreads_num_processors_np])
3605 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3606 GCC_TRY_COMPILE_OR_LINK(
3607 [#include <pthread.h>],
3608 [int n = pthread_num_processors_np();],
3609 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3610 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3612 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3613 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3615 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3617 CXXFLAGS="$ac_save_CXXFLAGS"
3622 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3624 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
3628 ac_save_CXXFLAGS="$CXXFLAGS"
3629 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3631 AC_MSG_CHECKING([for hw.ncpu sysctl])
3632 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
3633 GCC_TRY_COMPILE_OR_LINK(
3636 #include <sys/sysctl.h>
3640 size_t size = sizeof(count);
3641 int mib[] = { CTL_HW, HW_NCPU };
3642 sysctl(mib, 2, &count, &size, NULL, 0);
3644 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
3645 [glibcxx_cv_SYSCTL_HW_NCPU=no])
3647 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
3648 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
3650 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
3652 CXXFLAGS="$ac_save_CXXFLAGS"
3657 dnl Check to see if python pretty printing can be activated.
3659 dnl --with-python-dir=dir
3660 dnl installs directory into $prefix/dir
3661 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
3663 AC_MSG_CHECKING([for custom python install directory])
3664 AC_ARG_WITH([python-dir],
3665 AS_HELP_STRING([--with-python-dir],
3666 [the location to install Python modules. This path is relative starting from the prefix.]),
3667 [with_python_dir=$withval], [with_python_dir="no"])
3668 AC_MSG_RESULT(${with_python_dir})
3670 # Needed for installing Python modules during make install.
3671 python_mod_dir="${with_python_dir}"
3672 AC_SUBST(python_mod_dir)
3673 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
3677 dnl Check to see if -Werror is disabled.
3679 dnl --enable-werror/--disable-werror
3680 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
3681 AC_MSG_CHECKING([for -Werror])
3682 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
3683 AC_MSG_RESULT($enable_werror)
3684 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
3689 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
3690 dnl Some versions of sdt.h were not compatible with C++11.
3692 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
3693 AC_MSG_RESULT([for suitable sys/sdt.h])
3694 # Note that this test has to be run with the C language.
3695 # Otherwise, sdt.h will try to include some headers from
3699 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
3700 # Because we have to run the test in C, we use grep rather
3701 # than the compiler to check for the bug. The bug is that
3702 # were strings without trailing whitespace, causing g++
3703 # to look for operator"". The pattern searches for the fixed
3705 AC_EGREP_CPP([ \",\" ], [
3706 #include <sys/sdt.h>
3707 int f() { STAP_PROBE(hi, bob); }
3708 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
3711 if test $glibcxx_cv_sys_sdt_h = yes; then
3712 AC_DEFINE(HAVE_SYS_SDT_H, 1,
3713 [Define to 1 if you have a suitable <sys/sdt.h> header file])
3715 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
3718 # Macros from the top-level gcc directory.
3719 m4_include([../config/gc++filt.m4])
3720 m4_include([../config/tls.m4])
3721 m4_include([../config/gthr.m4])