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 $host.
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_srcdir (absolute path)
41 dnl with_target_subdir
43 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
44 dnl - default settings for all AM_CONFITIONAL test variables
45 dnl - lots of tools, like CC and CXX
47 AC_DEFUN([GLIBCXX_CONFIGURE], [
48 # Keep these sync'd with the list in Makefile.am. The first provides an
49 # expandable list at autoconf time; the second provides an expandable list
50 # (i.e., shell variable) at configure time.
51 m4_define([glibcxx_SUBDIRS],[include libsupc++ python src doc po testsuite])
52 SUBDIRS='glibcxx_SUBDIRS'
54 # These need to be absolute paths, yet at the same time need to
55 # canonicalize only relative paths, because then amd will not unmount
56 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
57 glibcxx_builddir=`${PWDCMD-pwd}`
59 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
60 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
62 toplevel_srcdir=${glibcxx_srcdir}/..
63 AC_SUBST(glibcxx_builddir)
64 AC_SUBST(glibcxx_srcdir)
65 AC_SUBST(toplevel_srcdir)
67 # We use these options to decide which functions to include. They are
68 # set from the top level.
69 AC_ARG_WITH([target-subdir],
70 AC_HELP_STRING([--with-target-subdir=SUBDIR],
71 [configuring in a subdirectory]))
73 AC_ARG_WITH([cross-host],
74 AC_HELP_STRING([--with-cross-host=HOST],
75 [configuring with a cross compiler]))
78 AC_HELP_STRING([--with-newlib],
79 [assume newlib as a system C library]))
81 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
82 # available). Uncomment the next line to force a particular method.
88 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
92 # Set up safe default values for all subsequent AM_CONDITIONAL tests
93 # which are themselves conditionally expanded.
94 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
95 ## other macros from doing the same. This should be automated.) -pme
97 # Check for C library flavor since Linux platforms use different configuration
98 # directories depending on the C library in use.
99 AC_EGREP_CPP([_using_uclibc], [
104 ], uclibc=yes, uclibc=no)
106 AC_EGREP_CPP([_using_bionic], [
111 ], bionic=yes, bionic=no)
113 # Find platform-specific directories containing configuration info.
114 # Also possibly modify flags used elsewhere, as needed by the platform.
120 dnl Tests for newer compiler features, or features that are present in newer
121 dnl compiler versions but not older compiler versions still in use, should
125 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
126 dnl new inlining code or the new system_header pragma will die on -Werror.
127 dnl Leave it out by default and use maint-mode to use it.
128 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
129 dnl compiler supports it and the user has not requested debug mode.
131 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
132 # All these tests are for C++; save the language and the compiler flags.
133 # The CXXFLAGS thing is suspicious, but based on similar bits previously
134 # found in GLIBCXX_CONFIGURE.
137 ac_test_CXXFLAGS="${CXXFLAGS+set}"
138 ac_save_CXXFLAGS="$CXXFLAGS"
140 # Check for maintainer-mode bits.
141 if test x"$USE_MAINTAINER_MODE" = xno; then
147 # Check for -ffunction-sections -fdata-sections
148 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
149 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
150 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
151 if test "$ac_test_CXXFLAGS" = set; then
152 CXXFLAGS="$ac_save_CXXFLAGS"
154 # this is the suspicious part
157 if test x"$ac_fdsections" = x"yes"; then
158 SECTION_FLAGS='-ffunction-sections -fdata-sections'
160 AC_MSG_RESULT($ac_fdsections)
164 AC_SUBST(SECTION_FLAGS)
169 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
170 dnl the native linker is in use, all variables will be defined to something
171 dnl safe (like an empty string).
174 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
175 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
176 dnl LD (as a side effect of testing)
179 dnl glibcxx_ld_is_gold (set to "no" or "yes")
180 dnl glibcxx_gnu_ld_version (possibly)
182 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
183 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
185 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
186 # If we're not using GNU ld, then there's no point in even trying these
187 # tests. Check for that first. We should have already tested for gld
188 # by now (in libtool), but require it now just to be safe...
189 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
190 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
191 AC_REQUIRE([AC_PROG_LD])
192 AC_REQUIRE([AC_PROG_AWK])
194 # The name set by libtool depends on the version of libtool. Shame on us
195 # for depending on an impl detail, but c'est la vie. Older versions used
196 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
197 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
198 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
199 # set (hence we're using an older libtool), then set it.
200 if test x${with_gnu_ld+set} != xset; then
201 if test x${ac_cv_prog_gnu_ld+set} != xset; then
202 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
205 with_gnu_ld=$ac_cv_prog_gnu_ld
209 # Start by getting the version number. I think the libtool test already
210 # does some of this, but throws away the result.
211 glibcxx_ld_is_gold=no
212 if test x"$with_gnu_ld" = x"yes"; then
213 AC_MSG_CHECKING([for ld version])
215 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
216 glibcxx_ld_is_gold=yes
218 ldver=`$LD --version 2>/dev/null |
219 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'`
221 glibcxx_gnu_ld_version=`echo $ldver | \
222 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
223 AC_MSG_RESULT($glibcxx_gnu_ld_version)
227 glibcxx_have_gc_sections=no
228 if test "$glibcxx_ld_is_gold" = "yes"; then
229 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
230 glibcxx_have_gc_sections=yes
233 glibcxx_gcsections_min_ld=21602
234 if test x"$with_gnu_ld" = x"yes" &&
235 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
236 glibcxx_have_gc_sections=yes
239 if test "$glibcxx_have_gc_sections" = "yes"; then
240 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
241 # NB: This flag only works reliably after 2.16.1. Configure tests
242 # for this are difficult, so hard wire a value that should work.
244 ac_test_CFLAGS="${CFLAGS+set}"
245 ac_save_CFLAGS="$CFLAGS"
246 CFLAGS='-Wl,--gc-sections'
248 # Check for -Wl,--gc-sections
249 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
250 AC_TRY_LINK([ int one(void) { return 1; }
251 int two(void) { return 2; }
252 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
253 if test "$ac_gcsections" = "yes"; then
256 if $CC -c conftest.c; then
257 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
258 grep "Warning: gc-sections option ignored" > /dev/null; then
262 rm -f conftest.c conftest.o conftest
264 if test "$ac_gcsections" = "yes"; then
265 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
267 AC_MSG_RESULT($ac_gcsections)
269 if test "$ac_test_CFLAGS" = set; then
270 CFLAGS="$ac_save_CFLAGS"
272 # this is the suspicious part
278 # Note this is only for shared objects.
280 if test x"$with_gnu_ld" = x"yes"; then
281 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
282 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
283 if test -n "$cxx_z_relo"; then
284 OPT_LDFLAGS="-Wl,-z,relro"
287 AC_MSG_RESULT($ac_ld_relro)
290 # Set linker optimization flags.
291 if test x"$with_gnu_ld" = x"yes"; then
292 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
295 AC_SUBST(SECTION_LDFLAGS)
296 AC_SUBST(OPT_LDFLAGS)
301 dnl Check for headers for, and arguments to, the setrlimit() function.
302 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
305 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
306 dnl various HAVE_LIMIT_* for individual limit names
308 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
309 AC_MSG_CHECKING([for RLIMIT_$1])
312 #include <sys/time.h>
313 #include <sys/resource.h>
315 [ int f = RLIMIT_$1 ; ],
316 [glibcxx_mresult=1], [glibcxx_mresult=0])
317 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
318 [Only used in build directory testsuite_hooks.h.])
319 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
323 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
324 setrlimit_have_headers=yes
325 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
327 [setrlimit_have_headers=no])
328 # If don't have the headers, then we can't run the tests now, and we
329 # won't be seeing any of these during testsuite compilation.
330 if test $setrlimit_have_headers = yes; then
331 # Can't do these in a loop, else the resulting syntax is wrong.
332 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
333 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
334 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
335 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
336 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
338 # Check for rlimit, setrlimit.
339 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
342 #include <sys/time.h>
343 #include <sys/resource.h>
347 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
351 AC_MSG_CHECKING([for testsuite resource limits support])
352 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
354 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
355 [Define if using setrlimit to set resource limits during
360 AC_MSG_RESULT($ac_res_limits)
365 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
366 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
368 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
372 ac_save_CXXFLAGS="$CXXFLAGS"
373 CXXFLAGS="$CXXFLAGS -fno-exceptions"
375 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
376 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
377 GCC_TRY_COMPILE_OR_LINK(
378 [#include <sys/stat.h>],
381 S_ISREG(buffer.st_mode);],
382 [glibcxx_cv_S_ISREG=yes],
383 [glibcxx_cv_S_ISREG=no])
385 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
386 GCC_TRY_COMPILE_OR_LINK(
387 [#include <sys/stat.h>],
390 S_IFREG & buffer.st_mode;],
391 [glibcxx_cv_S_IFREG=yes],
392 [glibcxx_cv_S_IFREG=no])
395 if test $glibcxx_cv_S_ISREG = yes; then
396 AC_DEFINE(HAVE_S_ISREG, 1,
397 [Define if S_IFREG is available in <sys/stat.h>.])
399 elif test $glibcxx_cv_S_IFREG = yes; then
400 AC_DEFINE(HAVE_S_IFREG, 1,
401 [Define if S_IFREG is available in <sys/stat.h>.])
406 CXXFLAGS="$ac_save_CXXFLAGS"
412 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
414 AC_DEFUN([GLIBCXX_CHECK_POLL], [
418 ac_save_CXXFLAGS="$CXXFLAGS"
419 CXXFLAGS="$CXXFLAGS -fno-exceptions"
421 AC_MSG_CHECKING([for poll])
422 AC_CACHE_VAL(glibcxx_cv_POLL, [
423 GCC_TRY_COMPILE_OR_LINK(
425 [struct pollfd pfd[1];
426 pfd[0].events = POLLIN;
428 [glibcxx_cv_POLL=yes],
429 [glibcxx_cv_POLL=no])
431 if test $glibcxx_cv_POLL = yes; then
432 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
434 AC_MSG_RESULT($glibcxx_cv_POLL)
436 CXXFLAGS="$ac_save_CXXFLAGS"
442 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
444 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
448 ac_save_CXXFLAGS="$CXXFLAGS"
449 CXXFLAGS="$CXXFLAGS -fno-exceptions"
451 AC_MSG_CHECKING([for writev])
452 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
453 GCC_TRY_COMPILE_OR_LINK(
454 [#include <sys/uio.h>],
455 [struct iovec iov[2];
457 [glibcxx_cv_WRITEV=yes],
458 [glibcxx_cv_WRITEV=no])
460 if test $glibcxx_cv_WRITEV = yes; then
461 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
463 AC_MSG_RESULT($glibcxx_cv_WRITEV)
465 CXXFLAGS="$ac_save_CXXFLAGS"
471 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
472 dnl Also check whether int64_t is actually a typedef to long or long long.
474 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
479 AC_MSG_CHECKING([for int64_t])
480 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
482 [#include <stdint.h>],
484 [glibcxx_cv_INT64_T=yes],
485 [glibcxx_cv_INT64_T=no])
488 if test $glibcxx_cv_INT64_T = yes; then
489 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
490 AC_MSG_RESULT($glibcxx_cv_INT64_T)
492 AC_MSG_CHECKING([for int64_t as long])
493 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
496 template<typename, typename> struct same { enum { value = -1 }; };
497 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
498 int array[same<int64_t, long>::value];], [],
499 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
502 if test $glibcxx_cv_int64_t_long = yes; then
503 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
504 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
507 AC_MSG_CHECKING([for int64_t as long long])
508 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
511 template<typename, typename> struct same { enum { value = -1 }; };
512 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
513 int array[same<int64_t, long long>::value];], [],
514 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
517 if test $glibcxx_cv_int64_t_long_long = yes; then
518 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
519 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
528 dnl Check whether LFS support is available.
530 AC_DEFUN([GLIBCXX_CHECK_LFS], [
533 ac_save_CXXFLAGS="$CXXFLAGS"
534 CXXFLAGS="$CXXFLAGS -fno-exceptions"
535 AC_MSG_CHECKING([for LFS support])
536 AC_CACHE_VAL(glibcxx_cv_LFS, [
537 GCC_TRY_COMPILE_OR_LINK(
540 #include <sys/stat.h>
544 fseeko64(fp, 0, SEEK_CUR);
546 lseek64(1, 0, SEEK_CUR);
549 [glibcxx_cv_LFS=yes],
552 if test $glibcxx_cv_LFS = yes; then
553 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
555 AC_MSG_RESULT($glibcxx_cv_LFS)
556 CXXFLAGS="$ac_save_CXXFLAGS"
562 dnl Check for whether a fully dynamic basic_string implementation should
563 dnl be turned on, that does not put empty objects in per-process static
564 dnl memory (mostly useful together with shared memory allocators, see PR
565 dnl libstdc++/16612 for details).
567 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
568 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
569 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
570 dnl Where DEFAULT is either `yes' or `no'.
572 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
573 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
574 if test $enable_fully_dynamic_string = yes; then
575 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
576 [Define if a fully dynamic basic_string is wanted.])
582 dnl Does any necessary configuration of the testsuite directory. Generates
583 dnl the testsuite_hooks.h header.
585 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
589 dnl GLIBCXX_TEST_WCHAR_T
590 dnl GLIBCXX_TEST_THREAD
593 dnl baseline_subdir_switch
595 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
596 if $GLIBCXX_IS_NATIVE ; then
597 # Do checks for resource limit functions.
598 GLIBCXX_CHECK_SETRLIMIT
600 # Look for setenv, so that extended locale tests can be performed.
601 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
604 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
605 test $enable_symvers != no; then
608 enable_abi_check=no ;;
610 enable_abi_check=yes ;;
613 # Only build this as native, since automake does not understand
618 # Export file names for ABI checking.
619 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
620 AC_SUBST(baseline_dir)
621 baseline_subdir_switch="$abi_baseline_subdir_switch"
622 AC_SUBST(baseline_subdir_switch)
627 dnl Does any necessary configuration of the documentation directory.
629 dnl XSLTPROC must be set before this
632 dnl glibcxx_stylesheets
636 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
638 AC_MSG_CHECKING([for stylesheets used in generation of documentation])
639 glibcxx_stylesheets=no
640 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude http://docbook.sourceforge.net/release/xsl-ns/current/xhtml-1_1/docbook.xsl - 2>/dev/null; then
641 glibcxx_stylesheets=yes
643 AC_MSG_RESULT($glibcxx_stylesheets)
645 AC_MSG_CHECKING([for local stylesheet directory])
646 glibcxx_local_stylesheets=no
647 if test x"$glibcxx_stylesheets" = x"yes"; then
648 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then
649 glibcxx_local_stylesheets=yes
650 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets
652 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then
653 glibcxx_local_stylesheets=yes
654 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
657 AC_MSG_RESULT($glibcxx_local_stylesheets)
659 if test x"$glibcxx_local_stylesheets" = x"yes"; then
660 AC_SUBST(XSL_STYLE_DIR)
661 AC_MSG_NOTICE($XSL_STYLE_DIR)
663 glibcxx_stylesheets=no
669 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
673 dnl TOPLEVEL_INCLUDES
675 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
676 # Used for every C++ compile we perform.
678 -I$glibcxx_builddir/include/$host_alias \
679 -I$glibcxx_builddir/include \
680 -I$glibcxx_srcdir/libsupc++"
682 # For Canadian crosses, pick this up too.
683 if test $CANADIAN = yes; then
684 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
687 # Stuff in the actual top level. Currently only used by libsupc++ to
688 # get unwind* headers from the gcc dir.
689 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
690 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
692 # Now, export this to all the little Makefiles....
693 AC_SUBST(GLIBCXX_INCLUDES)
694 AC_SUBST(TOPLEVEL_INCLUDES)
699 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
700 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
703 dnl OPTIMIZE_CXXFLAGS
706 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
707 # Optimization flags that are probably a good idea for thrill-seekers. Just
708 # uncomment the lines below and make, everything else is ready to go...
709 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
710 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
711 AC_SUBST(OPTIMIZE_CXXFLAGS)
713 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
719 dnl All installation directory information is determined here.
723 dnl glibcxx_prefixdir
724 dnl glibcxx_toolexecdir
725 dnl glibcxx_toolexeclibdir
727 dnl Assumes cross_compiling bits already done, and with_cross_host in
730 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
731 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
732 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
733 glibcxx_toolexecdir=no
734 glibcxx_toolexeclibdir=no
735 glibcxx_prefixdir=$prefix
737 AC_MSG_CHECKING([for gxx-include-dir])
738 AC_ARG_WITH([gxx-include-dir],
739 AC_HELP_STRING([--with-gxx-include-dir=DIR],
740 [installation directory for include files]),
742 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
743 no) gxx_include_dir=no ;;
744 *) gxx_include_dir=$withval ;;
746 [gxx_include_dir=no])
747 AC_MSG_RESULT($gxx_include_dir)
749 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
750 AC_ARG_ENABLE([version-specific-runtime-libs],
751 AC_HELP_STRING([--enable-version-specific-runtime-libs],
752 [Specify that runtime libraries should be installed in a compiler-specific directory]),
753 [case "$enableval" in
754 yes) version_specific_libs=yes ;;
755 no) version_specific_libs=no ;;
756 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
758 [version_specific_libs=no])
759 AC_MSG_RESULT($version_specific_libs)
761 # Default case for install directory for include files.
762 if test $version_specific_libs = no && test $gxx_include_dir = no; then
763 gxx_include_dir='include/c++/${gcc_version}'
764 if test -n "$with_cross_host" &&
765 test x"$with_cross_host" != x"no"; then
766 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
768 gxx_include_dir='${prefix}/'"$gxx_include_dir"
772 # Version-specific runtime libs processing.
773 if test $version_specific_libs = yes; then
774 # Need the gcc compiler version to know where to install libraries
775 # and header files if --enable-version-specific-runtime-libs option
776 # is selected. FIXME: these variables are misnamed, there are
777 # no executables installed in _toolexecdir or _toolexeclibdir.
778 if test x"$gxx_include_dir" = x"no"; then
779 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
781 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
782 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
785 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
786 # Install a library built with a cross compiler in tooldir, not libdir.
787 if test x"$glibcxx_toolexecdir" = x"no"; then
788 if test -n "$with_cross_host" &&
789 test x"$with_cross_host" != x"no"; then
790 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
791 glibcxx_toolexeclibdir='${toolexecdir}/lib'
793 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
794 glibcxx_toolexeclibdir='${libdir}'
796 multi_os_directory=`$CXX -print-multi-os-directory`
797 case $multi_os_directory in
798 .) ;; # Avoid trailing /.
799 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
803 AC_MSG_CHECKING([for install location])
804 AC_MSG_RESULT($gxx_include_dir)
806 AC_SUBST(glibcxx_prefixdir)
807 AC_SUBST(gxx_include_dir)
808 AC_SUBST(glibcxx_toolexecdir)
809 AC_SUBST(glibcxx_toolexeclibdir)
815 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
816 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
817 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
819 dnl See docs/html/17_intro/configury.html#enable for documentation.
821 m4_define([GLIBCXX_ENABLE],[dnl
822 m4_define([_g_switch],[--enable-$1])dnl
823 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
824 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
829 m4_bpatsubst([$5],[permit ])) ;;
830 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
831 dnl Idea for future: generate a URL pointing to
832 dnl "onlinedocs/configopts.html#whatever"
839 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
843 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
844 m4_undefine([_g_switch])dnl
845 m4_undefine([_g_help])dnl
850 dnl Check for ISO/IEC 9899:1999 "C99" support.
852 dnl --enable-c99 defines _GLIBCXX_USE_C99
853 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
854 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
855 dnl Where DEFAULT is either `yes' or `no'.
856 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
858 AC_DEFUN([GLIBCXX_ENABLE_C99], [
859 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
861 if test x"$enable_c99" = x"yes"; then
866 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
867 # undefined and fake C99 facilities - like pre-standard snprintf - may be
868 # spuriously enabled.
869 # Long term, -std=c++0x could be even better, could manage to explicitely
870 # request C99 facilities to the underlying C headers.
871 ac_save_CXXFLAGS="$CXXFLAGS"
872 CXXFLAGS="$CXXFLAGS -std=c++98"
874 ac_save_gcc_no_link="$gcc_no_link"
876 if test x$gcc_no_link != xyes; then
877 # Use -fno-exceptions to that the C driver can link these tests without
878 # hitting undefined references to personality routines.
879 CXXFLAGS="$CXXFLAGS -fno-exceptions"
880 AC_CHECK_LIB(m, sin, [
883 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
888 # Check for the existence of <math.h> functions used if C99 is enabled.
889 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
890 AC_CACHE_VAL(glibcxx_cv_c99_math, [
891 GCC_TRY_COMPILE_OR_LINK(
893 volatile double d1, d2;
901 i = isgreater(d1, d2);
902 i = isgreaterequal(d1, d2);
904 i = islessequal(d1, d2);
905 i = islessgreater(d1, d2);
906 i = islessgreater(d1, d2);
907 i = isunordered(d1, d2);
908 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
910 AC_MSG_RESULT($glibcxx_cv_c99_math)
911 if test x"$glibcxx_cv_c99_math" = x"yes"; then
912 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
913 [Define if C99 functions or macros in <math.h> should be imported
914 in <cmath> in namespace std.])
917 # Check for the existence of <complex.h> complex math functions.
918 # This is necessary even though libstdc++ uses the builtin versions
919 # of these functions, because if the builtin cannot be used, a reference
920 # to the library function is emitted.
921 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
922 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
923 glibcxx_cv_c99_complex=no;
924 if test x"$ac_has_complex_h" = x"yes"; then
925 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
926 GCC_TRY_COMPILE_OR_LINK(
927 [#include <complex.h>
928 typedef __complex__ float float_type;
929 typedef __complex__ double double_type;
930 typedef __complex__ long double ld_type;
931 volatile float_type tmpf;
932 volatile double_type tmpd;
933 volatile ld_type tmpld;
936 volatile long double ld;],
948 tmpf = cpowf(tmpf, tmpf);
961 tmpd = cpow(tmpd, tmpd);
965 tmpld = ccosl(tmpld);
966 tmpld = ccoshl(tmpld);
967 tmpld = cexpl(tmpld);
968 tmpld = clogl(tmpld);
969 tmpld = csinl(tmpld);
970 tmpld = csinhl(tmpld);
971 tmpld = csqrtl(tmpld);
972 tmpld = ctanl(tmpld);
973 tmpld = ctanhl(tmpld);
974 tmpld = cpowl(tmpld, tmpld);
975 tmpld = cprojl(tmpld);
976 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
978 AC_MSG_RESULT($glibcxx_cv_c99_complex)
979 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
980 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
981 [Define if C99 functions in <complex.h> should be used in
982 <complex>. Using compiler builtins for these functions requires
983 corresponding C99 library functions to be present.])
986 # Check for the existence in <stdio.h> of vscanf, et. al.
987 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
988 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
989 GCC_TRY_COMPILE_OR_LINK(
992 void foo(char* fmt, ...)
994 va_list args; va_start(args, fmt);
995 vfscanf(stderr, "%i", args);
997 vsnprintf(fmt, 0, "%i", args);
998 vsscanf(fmt, "%i", args);
1000 [snprintf("12", 0, "%i");],
1001 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
1003 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
1005 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1006 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1007 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
1008 GCC_TRY_COMPILE_OR_LINK(
1009 [#include <stdlib.h>
1011 volatile long double ld;
1012 volatile unsigned long long ll;
1015 f = strtof("gnu", &tmp);
1016 ld = strtold("gnu", &tmp);
1017 ll = strtoll("gnu", &tmp, 10);
1018 ll = strtoull("gnu", &tmp, 10);
1020 mydivt = lldiv(10,1);
1025 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
1027 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
1029 # Check for the existence in <wchar.h> of wcstold, etc.
1030 glibcxx_cv_c99_wchar=no;
1031 if test x"$ac_has_wchar_h" = xyes &&
1032 test x"$ac_has_wctype_h" = xyes; then
1033 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1034 AC_TRY_COMPILE([#include <wchar.h>
1041 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
1043 # Checks for wide character functions that may not be present.
1044 # Injection of these is wrapped with guard macros.
1045 # NB: only put functions here, instead of immediately above, if
1046 # absolutely necessary.
1047 AC_TRY_COMPILE([#include <wchar.h>
1048 namespace test { using ::vfwscanf; } ], [],
1049 [AC_DEFINE(HAVE_VFWSCANF,1,
1050 [Defined if vfwscanf exists.])],[])
1052 AC_TRY_COMPILE([#include <wchar.h>
1053 namespace test { using ::vswscanf; } ], [],
1054 [AC_DEFINE(HAVE_VSWSCANF,1,
1055 [Defined if vswscanf exists.])],[])
1057 AC_TRY_COMPILE([#include <wchar.h>
1058 namespace test { using ::vwscanf; } ], [],
1059 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1061 AC_TRY_COMPILE([#include <wchar.h>
1062 namespace test { using ::wcstof; } ], [],
1063 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1065 AC_TRY_COMPILE([#include <wctype.h>],
1066 [ wint_t t; int i = iswblank(t);],
1067 [AC_DEFINE(HAVE_ISWBLANK,1,
1068 [Defined if iswblank exists.])],[])
1070 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1073 # Option parsed, now set things appropriately.
1074 if test x"$glibcxx_cv_c99_math" = x"no" ||
1075 test x"$glibcxx_cv_c99_complex" = x"no" ||
1076 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1077 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1078 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1081 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1082 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1083 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1086 gcc_no_link="$ac_save_gcc_no_link"
1087 LIBS="$ac_save_LIBS"
1088 CXXFLAGS="$ac_save_CXXFLAGS"
1092 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1093 AC_MSG_RESULT($enable_c99)
1098 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1099 dnl implementation of 20.8.5 [time.clock], and 30.2.2 [thread.thread.this]
1100 dnl in the current C++0x working draft.
1102 dnl --enable-libstdcxx-time
1103 dnl --enable-libstdcxx-time=yes
1104 dnl checks for the availability of monotonic and realtime clocks,
1105 dnl nanosleep and sched_yield in libc and libposix4 and, in case, links
1107 dnl --enable-libstdcxx-time=rt
1108 dnl also searches (and, in case, links) librt. Note that this is
1109 dnl not always desirable because, in glibc, for example, in turn it
1110 dnl triggers the linking of libpthread too, which activates locking,
1111 dnl a large overhead for single-thread programs.
1112 dnl --enable-libstdcxx-time=no
1113 dnl --disable-libstdcxx-time
1114 dnl disables the checks completely
1116 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1118 AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
1119 GLIBCXX_ENABLE(libstdcxx-time,$1,[[[=KIND]]],
1120 [use KIND for check type],
1125 ac_save_CXXFLAGS="$CXXFLAGS"
1126 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1127 ac_save_LIBS="$LIBS"
1129 ac_has_clock_monotonic=no
1130 ac_has_clock_realtime=no
1131 AC_MSG_RESULT($enable_libstdcxx_time)
1133 if test x"$enable_libstdcxx_time" != x"no"; then
1135 if test x"$enable_libstdcxx_time" = x"rt"; then
1136 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1137 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1139 AC_SEARCH_LIBS(clock_gettime, [posix4])
1140 AC_SEARCH_LIBS(nanosleep, [posix4])
1143 case "$ac_cv_search_clock_gettime" in
1144 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1147 case "$ac_cv_search_nanosleep" in
1148 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1152 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1154 case "$ac_cv_search_sched_yield" in
1156 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1157 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1158 [ Defined if sched_yield is available. ])
1161 if test x"$enable_libstdcxx_time" = x"rt"; then
1162 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1163 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1164 [ Defined if sched_yield is available. ])
1168 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1169 [ Defined if sched_yield is available. ])
1173 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1175 if test x"$ac_has_unistd_h" = x"yes"; then
1176 AC_MSG_CHECKING([for monotonic clock])
1178 [#include <unistd.h>
1181 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1184 clock_gettime(CLOCK_MONOTONIC, &tp);
1185 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1187 AC_MSG_RESULT($ac_has_clock_monotonic)
1189 AC_MSG_CHECKING([for realtime clock])
1191 [#include <unistd.h>
1194 [#if _POSIX_TIMERS > 0
1197 clock_gettime(CLOCK_REALTIME, &tp);
1198 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1200 AC_MSG_RESULT($ac_has_clock_realtime)
1202 AC_MSG_CHECKING([for nanosleep])
1204 [#include <unistd.h>
1207 [#if _POSIX_TIMERS > 0
1211 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1213 AC_MSG_RESULT($ac_has_nanosleep)
1217 if test x"$ac_has_clock_monotonic" = x"yes"; then
1218 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1219 [ Defined if clock_gettime has monotonic clock support. ])
1222 if test x"$ac_has_clock_realtime" = x"yes"; then
1223 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1224 [ Defined if clock_gettime has realtime clock support. ])
1227 if test x"$ac_has_nanosleep" = x"yes"; then
1228 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1229 [ Defined if nanosleep is available. ])
1232 AC_SUBST(GLIBCXX_LIBS)
1234 CXXFLAGS="$ac_save_CXXFLAGS"
1235 LIBS="$ac_save_LIBS"
1240 dnl Check for gettimeofday, used in the implementation of 20.8.5
1241 dnl [time.clock] in the current C++0x working draft.
1243 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1245 AC_MSG_CHECKING([for gettimeofday])
1249 ac_save_CXXFLAGS="$CXXFLAGS"
1250 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1252 ac_has_gettimeofday=no;
1253 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1254 if test x"$ac_has_sys_time_h" = x"yes"; then
1255 AC_MSG_CHECKING([for gettimeofday])
1256 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1257 [timeval tv; gettimeofday(&tv, 0);],
1258 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1260 AC_MSG_RESULT($ac_has_gettimeofday)
1263 if test x"$ac_has_gettimeofday" = x"yes"; then
1264 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1265 [ Defined if gettimeofday is available. ])
1268 CXXFLAGS="$ac_save_CXXFLAGS"
1273 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1274 dnl facilities in Chapter 8, "C compatibility".
1276 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1281 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1282 # undefined and fake C99 facilities may be spuriously enabled.
1283 ac_save_CXXFLAGS="$CXXFLAGS"
1284 CXXFLAGS="$CXXFLAGS -std=c++98"
1286 # Check for the existence of <complex.h> complex math functions used
1288 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1289 ac_c99_complex_tr1=no;
1290 if test x"$ac_has_complex_h" = x"yes"; then
1291 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1292 AC_TRY_COMPILE([#include <complex.h>],
1293 [typedef __complex__ float float_type; float_type tmpf;
1300 typedef __complex__ double double_type; double_type tmpd;
1307 typedef __complex__ long double ld_type; ld_type tmpld;
1314 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1316 AC_MSG_RESULT($ac_c99_complex_tr1)
1317 if test x"$ac_c99_complex_tr1" = x"yes"; then
1318 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1319 [Define if C99 functions in <complex.h> should be used in
1320 <tr1/complex>. Using compiler builtins for these functions
1321 requires corresponding C99 library functions to be present.])
1324 # Check for the existence of <ctype.h> functions.
1325 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1326 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1327 AC_TRY_COMPILE([#include <ctype.h>],
1331 ],[glibcxx_cv_c99_ctype_tr1=yes],
1332 [glibcxx_cv_c99_ctype_tr1=no])
1334 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1335 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1336 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1337 [Define if C99 functions in <ctype.h> should be imported in
1338 <tr1/cctype> in namespace std::tr1.])
1341 # Check for the existence of <fenv.h> functions.
1342 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1344 if test x"$ac_has_fenv_h" = x"yes"; then
1345 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1346 AC_TRY_COMPILE([#include <fenv.h>],
1351 ret = feclearexcept(except);
1352 ret = fegetexceptflag(pflag, except);
1353 ret = feraiseexcept(except);
1354 ret = fesetexceptflag(pflag, except);
1355 ret = fetestexcept(except);
1357 ret = fesetround(mode);
1358 ret = fegetenv(penv);
1359 ret = feholdexcept(penv);
1360 ret = fesetenv(penv);
1361 ret = feupdateenv(penv);
1362 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1364 AC_MSG_RESULT($ac_c99_fenv_tr1)
1365 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1366 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1367 [Define if C99 functions in <fenv.h> should be imported in
1368 <tr1/cfenv> in namespace std::tr1.])
1371 # Check for the existence of <stdint.h> types.
1372 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1373 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1374 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1375 #define __STDC_CONSTANT_MACROS
1376 #include <stdint.h>],
1377 [typedef int8_t my_int8_t;
1378 my_int8_t i8 = INT8_MIN;
1380 typedef int16_t my_int16_t;
1381 my_int16_t i16 = INT16_MIN;
1383 typedef int32_t my_int32_t;
1384 my_int32_t i32 = INT32_MIN;
1386 typedef int64_t my_int64_t;
1387 my_int64_t i64 = INT64_MIN;
1389 typedef int_fast8_t my_int_fast8_t;
1390 my_int_fast8_t if8 = INT_FAST8_MIN;
1391 if8 = INT_FAST8_MAX;
1392 typedef int_fast16_t my_int_fast16_t;
1393 my_int_fast16_t if16 = INT_FAST16_MIN;
1394 if16 = INT_FAST16_MAX;
1395 typedef int_fast32_t my_int_fast32_t;
1396 my_int_fast32_t if32 = INT_FAST32_MIN;
1397 if32 = INT_FAST32_MAX;
1398 typedef int_fast64_t my_int_fast64_t;
1399 my_int_fast64_t if64 = INT_FAST64_MIN;
1400 if64 = INT_FAST64_MAX;
1401 typedef int_least8_t my_int_least8_t;
1402 my_int_least8_t il8 = INT_LEAST8_MIN;
1403 il8 = INT_LEAST8_MAX;
1404 typedef int_least16_t my_int_least16_t;
1405 my_int_least16_t il16 = INT_LEAST16_MIN;
1406 il16 = INT_LEAST16_MAX;
1407 typedef int_least32_t my_int_least32_t;
1408 my_int_least32_t il32 = INT_LEAST32_MIN;
1409 il32 = INT_LEAST32_MAX;
1410 typedef int_least64_t my_int_least64_t;
1411 my_int_least64_t il64 = INT_LEAST64_MIN;
1412 il64 = INT_LEAST64_MAX;
1413 typedef intmax_t my_intmax_t;
1414 my_intmax_t im = INTMAX_MAX;
1416 typedef intptr_t my_intptr_t;
1417 my_intptr_t ip = INTPTR_MAX;
1419 typedef uint8_t my_uint8_t;
1420 my_uint8_t ui8 = UINT8_MAX;
1422 typedef uint16_t my_uint16_t;
1423 my_uint16_t ui16 = UINT16_MAX;
1425 typedef uint32_t my_uint32_t;
1426 my_uint32_t ui32 = UINT32_MAX;
1428 typedef uint64_t my_uint64_t;
1429 my_uint64_t ui64 = UINT64_MAX;
1431 typedef uint_fast8_t my_uint_fast8_t;
1432 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1433 uif8 = UINT_FAST8_MAX;
1434 typedef uint_fast16_t my_uint_fast16_t;
1435 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1436 uif16 = UINT_FAST16_MAX;
1437 typedef uint_fast32_t my_uint_fast32_t;
1438 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1439 uif32 = UINT_FAST32_MAX;
1440 typedef uint_fast64_t my_uint_fast64_t;
1441 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1442 uif64 = UINT_FAST64_MAX;
1443 typedef uint_least8_t my_uint_least8_t;
1444 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1445 uil8 = UINT_LEAST8_MAX;
1446 typedef uint_least16_t my_uint_least16_t;
1447 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1448 uil16 = UINT_LEAST16_MAX;
1449 typedef uint_least32_t my_uint_least32_t;
1450 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1451 uil32 = UINT_LEAST32_MAX;
1452 typedef uint_least64_t my_uint_least64_t;
1453 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1454 uil64 = UINT_LEAST64_MAX;
1455 typedef uintmax_t my_uintmax_t;
1456 my_uintmax_t uim = UINTMAX_MAX;
1458 typedef uintptr_t my_uintptr_t;
1459 my_uintptr_t uip = UINTPTR_MAX;
1461 ],[glibcxx_cv_c99_stdint_tr1=yes],
1462 [glibcxx_cv_c99_stdint_tr1=no])
1464 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1465 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1466 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1467 [Define if C99 types in <stdint.h> should be imported in
1468 <tr1/cstdint> in namespace std::tr1.])
1471 # Check for the existence of <math.h> functions.
1472 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1473 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1474 AC_TRY_COMPILE([#include <math.h>],
1475 [typedef double_t my_double_t;
1476 typedef float_t my_float_t;
1490 copysignf(0.0f, 0.0f);
1491 copysignl(0.0l, 0.0l);
1508 fmaf(0.0f, 0.0f, 0.0f);
1509 fmal(0.0l, 0.0l, 0.0l);
1552 nextafter(0.0, 0.0);
1553 nextafterf(0.0f, 0.0f);
1554 nextafterl(0.0l, 0.0l);
1555 nexttoward(0.0, 0.0);
1556 nexttowardf(0.0f, 0.0f);
1557 nexttowardl(0.0l, 0.0l);
1558 remainder(0.0, 0.0);
1559 remainderf(0.0f, 0.0f);
1560 remainderl(0.0l, 0.0l);
1561 remquo(0.0, 0.0, 0);
1562 remquof(0.0f, 0.0f, 0);
1563 remquol(0.0l, 0.0l, 0);
1582 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1584 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1585 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1586 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1587 [Define if C99 functions or macros in <math.h> should be imported
1588 in <tr1/cmath> in namespace std::tr1.])
1591 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1592 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1593 ac_c99_inttypes_tr1=no;
1594 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1595 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1596 AC_TRY_COMPILE([#include <inttypes.h>],
1597 [intmax_t i, numer, denom, base;
1600 intmax_t ret = imaxabs(i);
1601 imaxdiv_t dret = imaxdiv(numer, denom);
1602 ret = strtoimax(s, endptr, base);
1603 uintmax_t uret = strtoumax(s, endptr, base);
1604 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1606 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1607 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1608 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1609 [Define if C99 functions in <inttypes.h> should be imported in
1610 <tr1/cinttypes> in namespace std::tr1.])
1613 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't
1614 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1615 ac_c99_inttypes_wchar_t_tr1=no;
1616 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1617 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1618 AC_TRY_COMPILE([#include <inttypes.h>],
1622 intmax_t ret = wcstoimax(s, endptr, base);
1623 uintmax_t uret = wcstoumax(s, endptr, base);
1624 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1625 [ac_c99_inttypes_wchar_t_tr1=no])
1627 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1628 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1629 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1630 [Define if wchar_t C99 functions in <inttypes.h> should be
1631 imported in <tr1/cinttypes> in namespace std::tr1.])
1634 # Check for the existence of the <stdbool.h> header.
1635 AC_CHECK_HEADERS(stdbool.h)
1637 CXXFLAGS="$ac_save_CXXFLAGS"
1642 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1643 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1645 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1647 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1648 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1649 if test -r /dev/random && test -r /dev/urandom; then
1650 glibcxx_cv_random_tr1=yes;
1652 glibcxx_cv_random_tr1=no;
1655 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1657 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1658 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1659 [Define if /dev/random and /dev/urandom are available for
1660 the random_device of TR1 (Chapter 5.1).])
1666 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
1668 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
1670 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
1671 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
1672 [#include <stdio.h>],
1673 [AC_MSG_ERROR([computing EOF failed])])
1675 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
1676 [Define to the value of the EOF integer constant.])
1678 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
1679 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
1680 [#include <stdio.h>],
1681 [AC_MSG_ERROR([computing SEEK_CUR failed])])
1683 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
1684 [Define to the value of the SEEK_CUR integer constant.])
1686 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
1687 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
1688 [#include <stdio.h>],
1689 [AC_MSG_ERROR([computing SEEK_END failed])])
1691 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
1692 [Define to the value of the SEEK_END integer constant.])
1696 dnl Check whether macros, etc are present for <system_error>
1698 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1700 m4_pushdef([n_syserr], [1])dnl
1701 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1702 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1703 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1704 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1705 AC_MSG_CHECKING([for syserr])
1706 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1707 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1708 [int i = syserr;])],
1709 [glibcxx_cv_system_error[]n_syserr=yes],
1710 [glibcxx_cv_system_error[]n_syserr=no])
1712 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1713 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1714 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1716 m4_define([n_syserr], m4_incr(n_syserr))dnl
1717 m4_popdef([SYSERR])dnl
1719 m4_popdef([n_syserr])dnl
1723 dnl Check for what type of C headers to use.
1725 dnl --enable-cheaders= [does stuff].
1726 dnl --disable-cheaders [does not do anything, really].
1727 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1728 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1730 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1731 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
1732 [construct "C" headers for g++], [permit c|c_std|c_global])
1733 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1735 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1737 # Allow overrides to configure.host here.
1738 if test $enable_cheaders = c_global; then
1742 AC_SUBST(C_INCLUDE_DIR)
1743 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1744 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1745 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1746 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1751 dnl Check for which locale library to use. The choice is mapped to
1752 dnl a subdirectory of config/locale.
1754 dnl Default is generic.
1756 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1757 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
1758 [use MODEL for target locale package],
1759 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1761 # Deal with gettext issues. Default to not using it (=no) until we detect
1762 # support for it later. Let the user turn it off via --e/d, but let that
1763 # default to on for easier handling.
1766 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1770 # Either a known packaage, or "auto"
1771 if test $enable_clocale = no || test $enable_clocale = yes; then
1774 enable_clocale_flag=$enable_clocale
1776 # Probe for locale model to use if none specified.
1777 # Default to "generic".
1778 if test $enable_clocale_flag = auto; then
1779 case ${target_os} in
1780 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1781 enable_clocale_flag=gnu
1784 enable_clocale_flag=darwin
1787 enable_clocale_flag=generic
1792 # Sanity check model, and test for special functionality.
1793 if test $enable_clocale_flag = gnu; then
1794 AC_EGREP_CPP([_GLIBCXX_ok], [
1795 #include <features.h>
1796 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
1799 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1801 # Set it to scream when it hurts.
1802 ac_save_CFLAGS="$CFLAGS"
1803 CFLAGS="-Wimplicit-function-declaration -Werror"
1805 # Use strxfrm_l if available.
1806 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1808 #include <locale.h>],
1809 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1810 AC_DEFINE(HAVE_STRXFRM_L, 1,
1811 [Define if strxfrm_l is available in <string.h>.]),)
1813 # Use strerror_l if available.
1814 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1816 #include <locale.h>],
1817 [__locale_t loc; strerror_l(5, loc);],
1818 AC_DEFINE(HAVE_STRERROR_L, 1,
1819 [Define if strerror_l is available in <string.h>.]),)
1821 CFLAGS="$ac_save_CFLAGS"
1824 # Perhaps use strerror_r if available, and strerror_l isn't.
1825 ac_save_CFLAGS="$CFLAGS"
1826 CFLAGS="-Wimplicit-function-declaration -Werror"
1827 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1829 #include <locale.h>],
1830 [char s[128]; strerror_r(5, s, 128);],
1831 AC_DEFINE(HAVE_STRERROR_R, 1,
1832 [Define if strerror_r is available in <string.h>.]),)
1833 CFLAGS="$ac_save_CFLAGS"
1835 # Set configure bits for specified locale package
1836 AC_MSG_CHECKING([for C locale to use])
1837 case ${enable_clocale_flag} in
1839 AC_MSG_RESULT(generic)
1841 CLOCALE_H=config/locale/generic/c_locale.h
1842 CLOCALE_CC=config/locale/generic/c_locale.cc
1843 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1844 CCOLLATE_CC=config/locale/generic/collate_members.cc
1845 CCTYPE_CC=config/locale/generic/ctype_members.cc
1846 CMESSAGES_H=config/locale/generic/messages_members.h
1847 CMESSAGES_CC=config/locale/generic/messages_members.cc
1848 CMONEY_CC=config/locale/generic/monetary_members.cc
1849 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1850 CTIME_H=config/locale/generic/time_members.h
1851 CTIME_CC=config/locale/generic/time_members.cc
1852 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1855 AC_MSG_RESULT(darwin or freebsd)
1857 CLOCALE_H=config/locale/generic/c_locale.h
1858 CLOCALE_CC=config/locale/generic/c_locale.cc
1859 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1860 CCOLLATE_CC=config/locale/generic/collate_members.cc
1861 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1862 CMESSAGES_H=config/locale/generic/messages_members.h
1863 CMESSAGES_CC=config/locale/generic/messages_members.cc
1864 CMONEY_CC=config/locale/generic/monetary_members.cc
1865 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1866 CTIME_H=config/locale/generic/time_members.h
1867 CTIME_CC=config/locale/generic/time_members.cc
1868 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1874 # Declare intention to use gettext, and add support for specific
1876 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1879 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1880 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1881 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1884 # Export the build objects.
1885 for ling in $ALL_LINGUAS; do \
1886 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1887 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1889 AC_SUBST(glibcxx_MOFILES)
1890 AC_SUBST(glibcxx_POFILES)
1892 CLOCALE_H=config/locale/gnu/c_locale.h
1893 CLOCALE_CC=config/locale/gnu/c_locale.cc
1894 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1895 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1896 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1897 CMESSAGES_H=config/locale/gnu/messages_members.h
1898 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1899 CMONEY_CC=config/locale/gnu/monetary_members.cc
1900 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1901 CTIME_H=config/locale/gnu/time_members.h
1902 CTIME_CC=config/locale/gnu/time_members.cc
1903 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1906 AC_MSG_RESULT(IEEE 1003.1)
1908 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1909 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1910 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1911 CCOLLATE_CC=config/locale/generic/collate_members.cc
1912 CCTYPE_CC=config/locale/generic/ctype_members.cc
1913 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1914 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1915 CMONEY_CC=config/locale/generic/monetary_members.cc
1916 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1917 CTIME_H=config/locale/generic/time_members.h
1918 CTIME_CC=config/locale/generic/time_members.cc
1919 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1923 # This is where the testsuite looks for locale catalogs, using the
1924 # -DLOCALEDIR define during testsuite compilation.
1925 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1926 AC_SUBST(glibcxx_localedir)
1928 # A standalone libintl (e.g., GNU libintl) may be in use.
1929 if test $USE_NLS = yes; then
1930 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1931 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1933 if test $USE_NLS = yes; then
1934 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1935 [Define if NLS translations are to be used.])
1940 AC_SUBST(CMESSAGES_H)
1941 AC_SUBST(CCODECVT_CC)
1942 AC_SUBST(CCOLLATE_CC)
1944 AC_SUBST(CMESSAGES_CC)
1946 AC_SUBST(CNUMERIC_CC)
1949 AC_SUBST(CLOCALE_CC)
1950 AC_SUBST(CLOCALE_INTERNAL_H)
1955 dnl Check for which std::allocator base class to use. The choice is
1956 dnl mapped from a subdirectory of include/ext.
1960 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1961 AC_MSG_CHECKING([for std::allocator base class])
1962 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
1963 [use KIND for target std::allocator base],
1964 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1966 # If they didn't use this option switch, or if they specified --enable
1967 # with no specific model, we'll have to look for one. If they
1968 # specified --disable (???), do likewise.
1969 if test $enable_libstdcxx_allocator = no ||
1970 test $enable_libstdcxx_allocator = yes;
1972 enable_libstdcxx_allocator=auto
1975 # Either a known package, or "auto". Auto implies the default choice
1976 # for a particular platform.
1977 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1979 # Probe for host-specific support if no specific model is specified.
1981 if test $enable_libstdcxx_allocator_flag = auto; then
1982 case ${target_os} in
1983 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1984 enable_libstdcxx_allocator_flag=new
1987 enable_libstdcxx_allocator_flag=new
1991 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1994 # Set configure bits for specified locale package
1995 case ${enable_libstdcxx_allocator_flag} in
1997 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1998 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2001 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2002 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2005 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2006 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2009 ALLOCATOR_H=config/allocator/new_allocator_base.h
2010 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2013 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2014 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2018 AC_SUBST(ALLOCATOR_H)
2019 AC_SUBST(ALLOCATOR_NAME)
2024 dnl Check for whether the Boost-derived checks should be turned on.
2026 dnl --enable-concept-checks turns them on.
2027 dnl --disable-concept-checks leaves them off.
2028 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2029 dnl Where DEFAULT is either `yes' or `no'.
2031 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2032 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2033 if test $enable_concept_checks = yes; then
2034 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2035 [Define to use concept checking code from the boost libraries.])
2040 dnl Use extern templates.
2042 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2043 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2045 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2046 dnl Where DEFAULT is `yes' or `no'.
2048 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2050 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2052 AC_MSG_CHECKING([for extern template support])
2053 AC_MSG_RESULT([$enable_extern_template])
2055 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2059 dnl Check for parallel mode pre-requisites, including OpenMP support.
2061 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2063 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2067 # See if configured libgomp/omp.h exists. (libgomp may be in
2068 # noconfigdirs but not explicitly disabled.)
2069 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2070 enable_parallel=yes;
2072 AC_MSG_NOTICE([target-libgomp not built])
2075 AC_MSG_CHECKING([for parallel mode support])
2076 AC_MSG_RESULT([$enable_parallel])
2077 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
2082 dnl Check for which I/O library to use: stdio, or something specific.
2084 dnl Default is stdio.
2086 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2087 AC_MSG_CHECKING([for underlying I/O to use])
2088 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2089 [use target-specific I/O package], [permit stdio])
2091 # Now that libio has been removed, you can have any color you want as long
2092 # as it's black. This is one big no-op until other packages are added, but
2093 # showing the framework never hurts.
2094 case ${enable_cstdio} in
2096 CSTDIO_H=config/io/c_io_stdio.h
2097 BASIC_FILE_H=config/io/basic_file_stdio.h
2098 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2099 AC_MSG_RESULT(stdio)
2104 AC_SUBST(BASIC_FILE_H)
2105 AC_SUBST(BASIC_FILE_CC)
2110 dnl Check for "unusual" flags to pass to the compiler while building.
2112 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2113 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2114 dnl --disable-cxx-flags passes nothing.
2115 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2116 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2117 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2118 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2119 dnl If "default flags" is an empty string, the effect is the same
2120 dnl as --disable or --enable=no.
2122 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2123 AC_MSG_CHECKING([for extra compiler flags for building])
2124 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2125 [pass compiler FLAGS when building library],
2126 [case "x$enable_cxx_flags" in
2127 xno | x) enable_cxx_flags= ;;
2129 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2132 # Run through flags (either default or command-line) and set anything
2133 # extra (e.g., #defines) that must accompany particular g++ options.
2134 if test -n "$enable_cxx_flags"; then
2135 for f in $enable_cxx_flags; do
2139 *) # and we're trying to pass /what/ exactly?
2140 AC_MSG_ERROR([compiler flags start with a -]) ;;
2145 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2146 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2147 AC_SUBST(EXTRA_CXX_FLAGS)
2152 dnl Check to see if debugging libraries are to be built.
2154 dnl --enable-libstdcxx-debug
2155 dnl builds a separate set of debugging libraries in addition to the
2156 dnl normal (shared, static) libstdc++ binaries.
2158 dnl --disable-libstdcxx-debug
2159 dnl builds only one (non-debug) version of libstdc++.
2161 dnl --enable-libstdcxx-debug-flags=FLAGS
2162 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2164 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2165 dnl Where DEFAULT is either `yes' or `no'.
2167 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2168 AC_MSG_CHECKING([for additional debug build])
2169 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2170 AC_MSG_RESULT($enable_libstdcxx_debug)
2171 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2176 dnl Check for explicit debug flags.
2178 dnl --enable-libstdcxx-debug-flags='-O1'
2179 dnl is a general method for passing flags to be used when
2180 dnl building debug libraries with --enable-debug.
2182 dnl --disable-libstdcxx-debug-flags does nothing.
2183 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2184 dnl If "default flags" is an empty string, the effect is the same
2185 dnl as --disable or --enable=no.
2187 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2188 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2189 [pass compiler FLAGS when building debug library],
2190 [case "x$enable_libstdcxx_debug_flags" in
2191 xno | x) enable_libstdcxx_debug_flags= ;;
2193 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2196 # Option parsed, now set things appropriately
2197 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2198 AC_SUBST(DEBUG_FLAGS)
2200 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2205 dnl Check if the user only wants a freestanding library implementation.
2207 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2208 dnl installing only the headers required by [17.4.1.3] and the language
2209 dnl support library. More than that will be built (to keep the Makefiles
2210 dnl conveniently clean), but not installed.
2213 dnl is_hosted (yes/no)
2216 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2218 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2219 AC_ARG_ENABLE([hosted-libstdcxx],
2220 AC_HELP_STRING([--disable-hosted-libstdcxx],
2221 [only build freestanding C++ runtime support]),,
2224 enable_hosted_libstdcxx=no
2227 enable_hosted_libstdcxx=yes
2230 if test "$enable_hosted_libstdcxx" = no; then
2231 AC_MSG_NOTICE([Only freestanding libraries will be built])
2235 enable_libstdcxx_pch=no
2240 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2241 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2242 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2247 dnl Check for template specializations for the 'long long' type.
2248 dnl The result determines only whether 'long long' I/O is enabled; things
2249 dnl like numeric_limits<> specializations are always available.
2251 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2252 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2253 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2254 dnl Where DEFAULT is either `yes' or `no'.
2256 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2257 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2258 if test $enable_long_long = yes; then
2259 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2260 [Define if code specialized for long long should be used.])
2262 AC_MSG_CHECKING([for enabled long long specializations])
2263 AC_MSG_RESULT([$enable_long_long])
2268 dnl Check for decimal floating point.
2270 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2272 dnl This checks to see if the host supports decimal floating point types.
2275 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2277 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2279 # Fake what AC_TRY_COMPILE does, without linking as this is
2280 # unnecessary for this test.
2282 cat > conftest.$ac_ext << EOF
2283 [#]line __oline__ "configure"
2293 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2294 if AC_TRY_EVAL(ac_compile); then
2295 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2296 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2301 AC_MSG_RESULT($enable_dfp)
2306 dnl Check for template specializations for the 'wchar_t' type.
2308 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2309 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2310 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2311 dnl Where DEFAULT is either `yes' or `no'.
2313 dnl Necessary support must also be present.
2315 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2316 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2318 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2319 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2320 AC_MSG_CHECKING([for mbstate_t])
2321 AC_TRY_COMPILE([#include <wchar.h>],
2322 [mbstate_t teststate;],
2323 have_mbstate_t=yes, have_mbstate_t=no)
2324 AC_MSG_RESULT($have_mbstate_t)
2325 if test x"$have_mbstate_t" = xyes; then
2326 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2329 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2331 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2333 if test x"$enable_wchar_t" = x"yes"; then
2338 if test x"$ac_has_wchar_h" = xyes &&
2339 test x"$ac_has_wctype_h" = xyes; then
2340 AC_TRY_COMPILE([#include <wchar.h>
2401 ],[],[], [enable_wchar_t=no])
2409 if test x"$enable_wchar_t" = x"yes"; then
2410 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2411 [Define if code specialized for wchar_t should be used.])
2414 AC_MSG_CHECKING([for enabled wchar_t specializations])
2415 AC_MSG_RESULT([$enable_wchar_t])
2420 dnl Check to see if building and using a C++ precompiled header can be done.
2422 dnl --enable-libstdcxx-pch=yes
2423 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2424 dnl may work, after some light-hearted attempts to puzzle out compiler
2425 dnl support, flip bits on in include/Makefile.am
2427 dnl --disable-libstdcxx-pch
2428 dnl turns off attempts to use or build stdc++.h.gch.
2431 dnl glibcxx_PCHFLAGS
2433 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2434 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2435 if test $enable_libstdcxx_pch = yes; then
2436 AC_CACHE_CHECK([for compiler with PCH support],
2437 [glibcxx_cv_prog_CXX_pch],
2438 [ac_save_CXXFLAGS="$CXXFLAGS"
2439 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2442 echo '#include <math.h>' > conftest.h
2443 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2444 -o conftest.h.gch 1>&5 2>&1 &&
2445 echo '#error "pch failed"' > conftest.h &&
2446 echo '#include "conftest.h"' > conftest.cc &&
2447 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2449 glibcxx_cv_prog_CXX_pch=yes
2451 glibcxx_cv_prog_CXX_pch=no
2454 CXXFLAGS=$ac_save_CXXFLAGS
2457 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2460 AC_MSG_CHECKING([for enabled PCH])
2461 AC_MSG_RESULT([$enable_libstdcxx_pch])
2463 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2464 if test $enable_libstdcxx_pch = yes; then
2465 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2469 AC_SUBST(glibcxx_PCHFLAGS)
2474 dnl Check for atomic builtins.
2476 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2478 dnl This checks to see if the host supports the compiler-generated
2479 dnl builtins for atomic operations for various integral sizes. Note, this
2480 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2481 dnl that are used should be checked.
2484 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
2487 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2488 dnl _GLIBCXX_ATOMIC_BUILTINS_2
2489 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2490 dnl _GLIBCXX_ATOMIC_BUILTINS_8
2492 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2495 old_CXXFLAGS="$CXXFLAGS"
2497 # Do link tests if possible, instead asm tests, limited to some platforms
2498 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
2499 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
2500 atomic_builtins_link_tests=no
2501 if test x$gcc_no_link != xyes; then
2502 # Can do link tests. Limit to some tested platforms
2504 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
2505 atomic_builtins_link_tests=yes
2510 if test x$atomic_builtins_link_tests = xyes; then
2514 CXXFLAGS="$CXXFLAGS -fno-exceptions"
2516 AC_MSG_CHECKING([for atomic builtins for bool])
2517 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
2520 [typedef bool atomic_type;
2523 const atomic_type c3(0);
2524 __sync_fetch_and_add(&c1, c2);
2525 __sync_val_compare_and_swap(&c1, c3, c2);
2526 __sync_lock_test_and_set(&c1, c3);
2527 __sync_lock_release(&c1);
2528 __sync_synchronize();],
2529 [glibcxx_cv_atomic_bool=yes],
2530 [glibcxx_cv_atomic_bool=no])
2532 if test $glibcxx_cv_atomic_bool = yes; then
2533 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2534 [Define if builtin atomic operations for bool are supported on this host.])
2536 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2538 AC_MSG_CHECKING([for atomic builtins for short])
2539 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
2542 [typedef short atomic_type;
2545 const atomic_type c3(0);
2546 __sync_fetch_and_add(&c1, c2);
2547 __sync_val_compare_and_swap(&c1, c3, c2);
2548 __sync_lock_test_and_set(&c1, c3);
2549 __sync_lock_release(&c1);
2550 __sync_synchronize();],
2551 [glibcxx_cv_atomic_short=yes],
2552 [glibcxx_cv_atomic_short=no])
2554 if test $glibcxx_cv_atomic_short = yes; then
2555 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
2556 [Define if builtin atomic operations for short are supported on this host.])
2558 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2560 AC_MSG_CHECKING([for atomic builtins for int])
2561 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
2564 [typedef int atomic_type;
2567 const atomic_type c3(0);
2568 __sync_fetch_and_add(&c1, c2);
2569 __sync_val_compare_and_swap(&c1, c3, c2);
2570 __sync_lock_test_and_set(&c1, c3);
2571 __sync_lock_release(&c1);
2572 __sync_synchronize();],
2573 [glibcxx_cv_atomic_int=yes],
2574 [glibcxx_cv_atomic_int=no])
2576 if test $glibcxx_cv_atomic_int = yes; then
2577 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2578 [Define if builtin atomic operations for int are supported on this host.])
2580 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2582 AC_MSG_CHECKING([for atomic builtins for long long])
2583 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
2586 [typedef long long atomic_type;
2589 const atomic_type c3(0);
2590 __sync_fetch_and_add(&c1, c2);
2591 __sync_val_compare_and_swap(&c1, c3, c2);
2592 __sync_lock_test_and_set(&c1, c3);
2593 __sync_lock_release(&c1);
2594 __sync_synchronize();],
2595 [glibcxx_cv_atomic_long_long=yes],
2596 [glibcxx_cv_atomic_long_long=no])
2598 if test $glibcxx_cv_atomic_long_long = yes; then
2599 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
2600 [Define if builtin atomic operations for long long are supported on this host.])
2602 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2608 # Compile unoptimized.
2611 # Fake what AC_TRY_COMPILE does.
2613 cat > conftest.$ac_ext << EOF
2614 [#]line __oline__ "configure"
2617 typedef bool atomic_type;
2620 const atomic_type c3(0);
2621 __sync_fetch_and_add(&c1, c2);
2622 __sync_val_compare_and_swap(&c1, c3, c2);
2623 __sync_lock_test_and_set(&c1, c3);
2624 __sync_lock_release(&c1);
2625 __sync_synchronize();
2630 AC_MSG_CHECKING([for atomic builtins for bool])
2631 if AC_TRY_EVAL(ac_compile); then
2632 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2633 glibcxx_cv_atomic_bool=no
2635 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2636 [Define if builtin atomic operations for bool are supported on this host.])
2637 glibcxx_cv_atomic_bool=yes
2640 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2643 cat > conftest.$ac_ext << EOF
2644 [#]line __oline__ "configure"
2647 typedef short atomic_type;
2650 const atomic_type c3(0);
2651 __sync_fetch_and_add(&c1, c2);
2652 __sync_val_compare_and_swap(&c1, c3, c2);
2653 __sync_lock_test_and_set(&c1, c3);
2654 __sync_lock_release(&c1);
2655 __sync_synchronize();
2660 AC_MSG_CHECKING([for atomic builtins for short])
2661 if AC_TRY_EVAL(ac_compile); then
2662 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2663 glibcxx_cv_atomic_short=no
2665 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
2666 [Define if builtin atomic operations for short are supported on this host.])
2667 glibcxx_cv_atomic_short=yes
2670 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2673 cat > conftest.$ac_ext << EOF
2674 [#]line __oline__ "configure"
2677 // NB: _Atomic_word not necessarily int.
2678 typedef int atomic_type;
2681 const atomic_type c3(0);
2682 __sync_fetch_and_add(&c1, c2);
2683 __sync_val_compare_and_swap(&c1, c3, c2);
2684 __sync_lock_test_and_set(&c1, c3);
2685 __sync_lock_release(&c1);
2686 __sync_synchronize();
2691 AC_MSG_CHECKING([for atomic builtins for int])
2692 if AC_TRY_EVAL(ac_compile); then
2693 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2694 glibcxx_cv_atomic_int=no
2696 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2697 [Define if builtin atomic operations for int are supported on this host.])
2698 glibcxx_cv_atomic_int=yes
2701 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2704 cat > conftest.$ac_ext << EOF
2705 [#]line __oline__ "configure"
2708 typedef long long atomic_type;
2711 const atomic_type c3(0);
2712 __sync_fetch_and_add(&c1, c2);
2713 __sync_val_compare_and_swap(&c1, c3, c2);
2714 __sync_lock_test_and_set(&c1, c3);
2715 __sync_lock_release(&c1);
2716 __sync_synchronize();
2721 AC_MSG_CHECKING([for atomic builtins for long long])
2722 if AC_TRY_EVAL(ac_compile); then
2723 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2724 glibcxx_cv_atomic_long_long=no
2726 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
2727 [Define if builtin atomic operations for long long are supported on this host.])
2728 glibcxx_cv_atomic_long_long=yes
2731 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2736 CXXFLAGS="$old_CXXFLAGS"
2739 # Set atomicity_dir to builtins if either of above tests pass.
2740 if test $glibcxx_cv_atomic_int = yes || test $glibcxx_cv_atomic_bool = yes ; then
2741 atomicity_dir=cpu/generic/atomicity_builtins
2744 # If still generic, set to mutex.
2745 if test $atomicity_dir = "cpu/generic" ; then
2746 atomicity_dir=cpu/generic/atomicity_mutex
2747 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2748 if test "x$target_thread_file" = xsingle; then
2749 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2750 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2752 AC_MSG_WARN([They will be faked using a mutex.])
2753 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2761 dnl Check for exception handling support. If an explicit enable/disable
2762 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2763 dnl target may or may not support call frame exceptions.
2765 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2766 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2767 dnl Neither one forces an attempt at detection.
2770 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2772 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2773 AC_MSG_CHECKING([for exception model to use])
2776 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2777 [force use of builtin_setjmp for exceptions],
2778 [permit yes|no|auto])
2780 if test $enable_sjlj_exceptions = auto; then
2781 # Botheration. Now we've got to detect the exception model. Link tests
2782 # against libgcc.a are problematic since we've not been given proper -L
2783 # bits for single-tree newlib and libgloss.
2785 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2786 cat > conftest.$ac_ext << EOF
2787 [#]line __oline__ "configure"
2796 old_CXXFLAGS="$CXXFLAGS"
2798 if AC_TRY_EVAL(ac_compile); then
2799 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2800 enable_sjlj_exceptions=yes
2801 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2802 enable_sjlj_exceptions=no
2803 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2804 enable_sjlj_exceptions=no
2807 CXXFLAGS="$old_CXXFLAGS"
2811 # This is a tad weird, for hysterical raisins. We have to map
2812 # enable/disable to two different models.
2813 case $enable_sjlj_exceptions in
2815 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2816 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2817 ac_exception_model_name=sjlj
2820 ac_exception_model_name="call frame"
2823 AC_MSG_ERROR([unable to detect exception model])
2827 AC_MSG_RESULT($ac_exception_model_name)
2832 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2834 dnl --enable-visibility enables attempt to use visibility attributes.
2835 dnl --disable-visibility turns off all use of visibility attributes.
2836 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2837 dnl Where DEFAULT is 'yes'.
2839 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2840 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2842 if test x$enable_visibility = xyes ; then
2843 dnl all hail libgfortran
2844 dnl Check whether the target supports hidden visibility.
2845 AC_CACHE_CHECK([whether the target supports hidden visibility],
2846 glibcxx_cv_have_attribute_visibility, [
2847 save_CFLAGS="$CFLAGS"
2848 CFLAGS="$CFLAGS -Werror"
2849 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2850 [], glibcxx_cv_have_attribute_visibility=yes,
2851 glibcxx_cv_have_attribute_visibility=no)
2852 CFLAGS="$save_CFLAGS"])
2853 if test $glibcxx_cv_have_attribute_visibility = no; then
2854 enable_visibility=no
2858 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2859 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2864 dnl Add version tags to symbols in shared library (or not), additionally
2865 dnl marking other symbols as private/local (or not).
2867 dnl --enable-symvers=style adds a version script to the linker call when
2868 dnl creating the shared library. The choice of version script is
2869 dnl controlled by 'style'.
2870 dnl --disable-symvers does not.
2871 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2872 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2873 dnl choose a default style based on linker characteristics. Passing
2874 dnl 'no' disables versioning.
2876 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2878 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
2879 [enables symbol versioning of the shared library],
2880 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
2882 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2883 # don't know enough about $LD to do tricks...
2884 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2885 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
2886 # with extern "C++" in version scripts.
2887 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
2889 # Turn a 'yes' into a suitable default.
2890 if test x$enable_symvers = xyes ; then
2891 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2894 if test $with_gnu_ld = yes ; then
2895 case ${target_os} in
2897 enable_symvers=no ;;
2899 enable_symvers=gnu ;;
2902 case ${target_os} in
2904 enable_symvers=darwin ;;
2905 # Sun symbol versioning exists since Solaris 2.5.
2906 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
2907 # make_sunver.pl needs GNU c++filt to support extern "C++" in
2908 # version scripts, so disable symbol versioning if none can be
2910 if test -z "$ac_cv_path_CXXFILT"; then
2911 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
2912 AC_MSG_WARN([=== no GNU c++filt could be found.])
2913 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2920 enable_symvers=no ;;
2926 # Check to see if 'darwin' or 'darwin-export' can win.
2927 if test x$enable_symvers = xdarwin-export ; then
2928 enable_symvers=darwin
2931 # Check if 'sun' was requested on non-Solaris 2 platforms.
2932 if test x$enable_symvers = xsun ; then
2933 case ${target_os} in
2939 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
2940 AC_MSG_WARN([=== you are not targetting Solaris 2.])
2941 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2947 # Check to see if 'gnu' can win.
2948 if test $enable_symvers = gnu ||
2949 test $enable_symvers = gnu-versioned-namespace ||
2950 test $enable_symvers = sun; then
2951 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2952 AC_MSG_CHECKING([for shared libgcc])
2953 ac_save_CFLAGS="$CFLAGS"
2955 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2956 CFLAGS="$ac_save_CFLAGS"
2957 if test $glibcxx_shared_libgcc = no; then
2958 cat > conftest.c <<EOF
2959 int main (void) { return 0; }
2962 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2963 -shared -shared-libgcc -o conftest.so \
2964 conftest.c -v 2>&1 >/dev/null \
2965 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2967 rm -f conftest.c conftest.so
2968 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2969 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2970 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2971 CFLAGS="$ac_save_CFLAGS"
2974 AC_MSG_RESULT($glibcxx_shared_libgcc)
2976 # For GNU ld, we need at least this version. The format is described in
2977 # GLIBCXX_CHECK_LINKER_FEATURES above.
2978 glibcxx_min_gnu_ld_version=21400
2980 # If no shared libgcc, can't win.
2981 if test $glibcxx_shared_libgcc != yes; then
2982 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2983 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2984 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2986 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
2987 : All interesting versions of Sun ld support sun style symbol versioning.
2988 elif test $with_gnu_ld != yes ; then
2990 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2991 AC_MSG_WARN([=== you are not using the GNU linker.])
2992 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2994 elif test $glibcxx_ld_is_gold = yes ; then
2995 : All versions of gold support symbol versioning.
2996 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2997 # The right tools, the right setup, but too old. Fallbacks?
2998 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2999 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3000 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3001 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3002 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3007 # Everything parsed; figure out what file to use.
3008 case $enable_symvers in
3010 SYMVER_FILE=config/abi/pre/none.ver
3013 SYMVER_FILE=config/abi/pre/gnu.ver
3014 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3015 [Define to use GNU versioning in the shared library.])
3017 gnu-versioned-namespace)
3018 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3019 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3020 [Define to use GNU namespace versioning in the shared library.])
3023 SYMVER_FILE=config/abi/pre/gnu.ver
3024 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3025 [Define to use darwin versioning in the shared library.])
3028 SYMVER_FILE=config/abi/pre/gnu.ver
3029 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3030 [Define to use Sun versioning in the shared library.])
3034 if test x$enable_symvers != xno ; then
3035 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3036 [Define to use symbol versioning in the shared library.])
3039 AC_CACHE_CHECK([whether the target supports .symver directive],
3040 glibcxx_cv_have_as_symver_directive, [
3041 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3042 [], glibcxx_cv_have_as_symver_directive=yes,
3043 glibcxx_cv_have_as_symver_directive=no)])
3044 if test $glibcxx_cv_have_as_symver_directive = yes; then
3045 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3046 [Define to 1 if the target assembler supports .symver directive.])
3049 AC_SUBST(SYMVER_FILE)
3050 AC_SUBST(port_specific_symbol_files)
3051 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3052 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3053 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3054 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3055 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3056 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3058 if test $enable_symvers != no ; then
3059 case ${target_os} in
3060 # The Solaris 2 runtime linker doesn't support the GNU extension of
3061 # binding the same symbol to different versions
3063 symvers_renaming=no ;;
3064 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3066 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3067 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3068 symvers_renaming=yes ;;
3073 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SOL2, test $symvers_renaming = no)
3075 # Now, set up compatibility support, if any.
3076 # In addition, need this to deal with std::size_t mangling in
3077 # src/compatibility.cc. In a perfect world, could use
3078 # typeid(std::size_t).name()[0] to do direct substitution.
3079 AC_MSG_CHECKING([for size_t as unsigned int])
3080 ac_save_CFLAGS="$CFLAGS"
3082 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3083 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3084 CFLAGS=$ac_save_CFLAGS
3085 if test "$glibcxx_size_t_is_i" = yes; then
3086 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3088 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3090 AC_MSG_CHECKING([for ptrdiff_t as int])
3091 ac_save_CFLAGS="$CFLAGS"
3093 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3094 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3095 CFLAGS=$ac_save_CFLAGS
3096 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3097 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3099 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3104 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3105 dnl We must stage the required headers so that they will be installed
3106 dnl with the library (unlike libgcc, the STL implementation is provided
3107 dnl solely within headers). Since we must not inject random user-space
3108 dnl macro names into user-provided C++ code, we first stage into <file>-in
3109 dnl and process to <file> with an output command. The reason for a two-
3110 dnl stage process here is to correctly handle $srcdir!=$objdir without
3111 dnl having to write complex code (the sed commands to clean the macro
3112 dnl namespace are complex and fragile enough as it is). We must also
3113 dnl add a relative path so that -I- is supported properly.
3116 dnl glibcxx_thread_h
3119 dnl HAVE_GTHR_DEFAULT
3121 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3122 AC_MSG_CHECKING([for thread model used by GCC])
3123 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3124 AC_MSG_RESULT([$target_thread_file])
3126 if test $target_thread_file != single; then
3127 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
3128 [Define if gthr-default.h exists
3129 (meaning that threading support is enabled).])
3132 glibcxx_thread_h=gthr-$target_thread_file.h
3134 dnl Check for __GTHREADS define.
3135 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
3136 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
3142 AC_SUBST(glibcxx_thread_h)
3147 dnl Check if gthread implementation defines the types and functions
3148 dnl required by the c++0x thread library. Conforming gthread
3149 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3151 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3155 ac_save_CXXFLAGS="$CXXFLAGS"
3156 CXXFLAGS="$CXXFLAGS -fno-exceptions -I${toplevel_srcdir}/gcc"
3158 AC_MSG_CHECKING([check whether it can be safely assumed that mutex_timedlock is available])
3160 AC_TRY_COMPILE([#include <unistd.h>],
3162 #if !defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS < 0
3165 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3167 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3168 [Define to 1 if mutex_timedlock is available.])
3170 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3171 else res_mutex_timedlock=no ; fi
3172 AC_MSG_RESULT([$res_mutex_timedlock])
3174 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3175 case $target_thread_file in
3177 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3180 AC_MSG_CHECKING([for gthreads library])
3187 #ifndef __GTHREADS_CXX0X
3191 // In case of POSIX threads check _POSIX_TIMEOUTS too.
3192 #if (defined(_PTHREADS) \
3193 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3196 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3198 AC_MSG_RESULT([$ac_has_gthreads])
3200 if test x"$ac_has_gthreads" = x"yes"; then
3201 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3202 [Define if gthreads library is available.])
3205 CXXFLAGS="$ac_save_CXXFLAGS"
3210 # Check whether LC_MESSAGES is available in <locale.h>.
3211 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3213 # This file file be copied and used freely without restrictions. It can
3214 # be used in projects which are not available under the GNU Public License
3215 # but which still want to provide support for the GNU gettext functionality.
3216 # Please note that the actual code is *not* freely available.
3217 AC_DEFUN([AC_LC_MESSAGES], [
3218 AC_CHECK_HEADER(locale.h, [
3219 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3220 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3221 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3222 if test $ac_cv_val_LC_MESSAGES = yes; then
3223 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3224 [Define if LC_MESSAGES is available in <locale.h>.])
3230 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3232 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3236 ac_save_CXXFLAGS="$CXXFLAGS"
3237 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3239 AC_MSG_CHECKING([for get_nprocs])
3240 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3241 GCC_TRY_COMPILE_OR_LINK(
3242 [#include <sys/sysinfo.h>],
3243 [int n = get_nprocs();],
3244 [glibcxx_cv_GET_NPROCS=yes],
3245 [glibcxx_cv_GET_NPROCS=no])
3247 if test $glibcxx_cv_GET_NPROCS = yes; then
3248 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3250 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3252 CXXFLAGS="$ac_save_CXXFLAGS"
3257 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3259 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3263 ac_save_CXXFLAGS="$CXXFLAGS"
3264 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3266 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3267 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3268 GCC_TRY_COMPILE_OR_LINK(
3269 [#include <unistd.h>],
3270 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3271 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3272 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3274 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3275 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3277 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3279 CXXFLAGS="$ac_save_CXXFLAGS"
3284 # Macros from the top-level gcc directory.
3285 m4_include([../config/gc++filt.m4])
3286 m4_include([../config/tls.m4])