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($ac_fdsections)
167 AC_SUBST(SECTION_FLAGS)
172 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
173 dnl the native linker is in use, all variables will be defined to something
174 dnl safe (like an empty string).
177 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
178 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
179 dnl LD (as a side effect of testing)
182 dnl glibcxx_ld_is_gold (set to "no" or "yes")
183 dnl glibcxx_gnu_ld_version (possibly)
185 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
186 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
188 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
189 # If we're not using GNU ld, then there's no point in even trying these
190 # tests. Check for that first. We should have already tested for gld
191 # by now (in libtool), but require it now just to be safe...
192 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
193 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
194 AC_REQUIRE([AC_PROG_LD])
195 AC_REQUIRE([AC_PROG_AWK])
197 # The name set by libtool depends on the version of libtool. Shame on us
198 # for depending on an impl detail, but c'est la vie. Older versions used
199 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
200 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
201 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
202 # set (hence we're using an older libtool), then set it.
203 if test x${with_gnu_ld+set} != xset; then
204 if test x${ac_cv_prog_gnu_ld+set} != xset; then
205 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
208 with_gnu_ld=$ac_cv_prog_gnu_ld
212 # Start by getting the version number. I think the libtool test already
213 # does some of this, but throws away the result.
214 glibcxx_ld_is_gold=no
215 if test x"$with_gnu_ld" = x"yes"; then
216 AC_MSG_CHECKING([for ld version])
218 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
219 glibcxx_ld_is_gold=yes
221 ldver=`$LD --version 2>/dev/null |
222 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'`
224 glibcxx_gnu_ld_version=`echo $ldver | \
225 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
226 AC_MSG_RESULT($glibcxx_gnu_ld_version)
230 glibcxx_have_gc_sections=no
231 if test "$glibcxx_ld_is_gold" = "yes"; then
232 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
233 glibcxx_have_gc_sections=yes
236 glibcxx_gcsections_min_ld=21602
237 if test x"$with_gnu_ld" = x"yes" &&
238 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
239 glibcxx_have_gc_sections=yes
242 if test "$glibcxx_have_gc_sections" = "yes"; then
243 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
244 # NB: This flag only works reliably after 2.16.1. Configure tests
245 # for this are difficult, so hard wire a value that should work.
247 ac_test_CFLAGS="${CFLAGS+set}"
248 ac_save_CFLAGS="$CFLAGS"
249 CFLAGS='-Wl,--gc-sections'
251 # Check for -Wl,--gc-sections
252 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
253 AC_TRY_LINK([ int one(void) { return 1; }
254 int two(void) { return 2; }
255 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
256 if test "$ac_gcsections" = "yes"; then
259 if $CC -c conftest.c; then
260 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
261 grep "Warning: gc-sections option ignored" > /dev/null; then
265 rm -f conftest.c conftest.o conftest
267 if test "$ac_gcsections" = "yes"; then
268 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
270 AC_MSG_RESULT($ac_gcsections)
272 if test "$ac_test_CFLAGS" = set; then
273 CFLAGS="$ac_save_CFLAGS"
275 # this is the suspicious part
281 # Note this is only for shared objects.
283 if test x"$with_gnu_ld" = x"yes"; then
284 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
285 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
286 if test -n "$cxx_z_relo"; then
287 OPT_LDFLAGS="-Wl,-z,relro"
290 AC_MSG_RESULT($ac_ld_relro)
293 # Set linker optimization flags.
294 if test x"$with_gnu_ld" = x"yes"; then
295 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
298 AC_SUBST(SECTION_LDFLAGS)
299 AC_SUBST(OPT_LDFLAGS)
304 dnl Check for headers for, and arguments to, the setrlimit() function.
305 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
308 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
309 dnl various HAVE_LIMIT_* for individual limit names
311 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
312 AC_MSG_CHECKING([for RLIMIT_$1])
315 #include <sys/time.h>
316 #include <sys/resource.h>
318 [ int f = RLIMIT_$1 ; ],
319 [glibcxx_mresult=1], [glibcxx_mresult=0])
320 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
321 [Only used in build directory testsuite_hooks.h.])
322 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
326 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
327 setrlimit_have_headers=yes
328 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
330 [setrlimit_have_headers=no])
331 # If don't have the headers, then we can't run the tests now, and we
332 # won't be seeing any of these during testsuite compilation.
333 if test $setrlimit_have_headers = yes; then
334 # Can't do these in a loop, else the resulting syntax is wrong.
335 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
336 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
337 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
338 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
339 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
341 # Check for rlimit, setrlimit.
342 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
345 #include <sys/time.h>
346 #include <sys/resource.h>
350 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
354 AC_MSG_CHECKING([for testsuite resource limits support])
355 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
357 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
358 [Define if using setrlimit to set resource limits during
363 AC_MSG_RESULT($ac_res_limits)
368 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
369 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
371 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
375 ac_save_CXXFLAGS="$CXXFLAGS"
376 CXXFLAGS="$CXXFLAGS -fno-exceptions"
378 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
379 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
380 GCC_TRY_COMPILE_OR_LINK(
381 [#include <sys/stat.h>],
384 S_ISREG(buffer.st_mode);],
385 [glibcxx_cv_S_ISREG=yes],
386 [glibcxx_cv_S_ISREG=no])
388 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
389 GCC_TRY_COMPILE_OR_LINK(
390 [#include <sys/stat.h>],
393 S_IFREG & buffer.st_mode;],
394 [glibcxx_cv_S_IFREG=yes],
395 [glibcxx_cv_S_IFREG=no])
398 if test $glibcxx_cv_S_ISREG = yes; then
399 AC_DEFINE(HAVE_S_ISREG, 1,
400 [Define if S_IFREG is available in <sys/stat.h>.])
402 elif test $glibcxx_cv_S_IFREG = yes; then
403 AC_DEFINE(HAVE_S_IFREG, 1,
404 [Define if S_IFREG is available in <sys/stat.h>.])
409 CXXFLAGS="$ac_save_CXXFLAGS"
415 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
417 AC_DEFUN([GLIBCXX_CHECK_POLL], [
421 ac_save_CXXFLAGS="$CXXFLAGS"
422 CXXFLAGS="$CXXFLAGS -fno-exceptions"
424 AC_MSG_CHECKING([for poll])
425 AC_CACHE_VAL(glibcxx_cv_POLL, [
426 GCC_TRY_COMPILE_OR_LINK(
428 [struct pollfd pfd[1];
429 pfd[0].events = POLLIN;
431 [glibcxx_cv_POLL=yes],
432 [glibcxx_cv_POLL=no])
434 if test $glibcxx_cv_POLL = yes; then
435 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
437 AC_MSG_RESULT($glibcxx_cv_POLL)
439 CXXFLAGS="$ac_save_CXXFLAGS"
445 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
447 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
451 ac_save_CXXFLAGS="$CXXFLAGS"
452 CXXFLAGS="$CXXFLAGS -fno-exceptions"
454 AC_MSG_CHECKING([for writev])
455 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
456 GCC_TRY_COMPILE_OR_LINK(
457 [#include <sys/uio.h>],
458 [struct iovec iov[2];
460 [glibcxx_cv_WRITEV=yes],
461 [glibcxx_cv_WRITEV=no])
463 if test $glibcxx_cv_WRITEV = yes; then
464 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
466 AC_MSG_RESULT($glibcxx_cv_WRITEV)
468 CXXFLAGS="$ac_save_CXXFLAGS"
474 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
475 dnl Also check whether int64_t is actually a typedef to long or long long.
477 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
482 AC_MSG_CHECKING([for int64_t])
483 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
485 [#include <stdint.h>],
487 [glibcxx_cv_INT64_T=yes],
488 [glibcxx_cv_INT64_T=no])
491 if test $glibcxx_cv_INT64_T = yes; then
492 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
493 AC_MSG_RESULT($glibcxx_cv_INT64_T)
495 AC_MSG_CHECKING([for int64_t as long])
496 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
499 template<typename, typename> struct same { enum { value = -1 }; };
500 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
501 int array[same<int64_t, long>::value];], [],
502 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
505 if test $glibcxx_cv_int64_t_long = yes; then
506 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
507 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
510 AC_MSG_CHECKING([for int64_t as long long])
511 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
514 template<typename, typename> struct same { enum { value = -1 }; };
515 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
516 int array[same<int64_t, long long>::value];], [],
517 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
520 if test $glibcxx_cv_int64_t_long_long = yes; then
521 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
522 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
531 dnl Check whether LFS support is available.
533 AC_DEFUN([GLIBCXX_CHECK_LFS], [
536 ac_save_CXXFLAGS="$CXXFLAGS"
537 CXXFLAGS="$CXXFLAGS -fno-exceptions"
538 AC_MSG_CHECKING([for LFS support])
539 AC_CACHE_VAL(glibcxx_cv_LFS, [
540 GCC_TRY_COMPILE_OR_LINK(
543 #include <sys/stat.h>
547 fseeko64(fp, 0, SEEK_CUR);
549 lseek64(1, 0, SEEK_CUR);
552 [glibcxx_cv_LFS=yes],
555 if test $glibcxx_cv_LFS = yes; then
556 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
558 AC_MSG_RESULT($glibcxx_cv_LFS)
559 CXXFLAGS="$ac_save_CXXFLAGS"
565 dnl Check for whether a fully dynamic basic_string implementation should
566 dnl be turned on, that does not put empty objects in per-process static
567 dnl memory (mostly useful together with shared memory allocators, see PR
568 dnl libstdc++/16612 for details).
570 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
571 dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
572 dnl otherwise undefined
573 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
574 dnl Where DEFAULT is either `yes' or `no'.
576 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
577 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
578 if test $enable_fully_dynamic_string = yes; then
579 enable_fully_dynamic_string_def=1
581 enable_fully_dynamic_string_def=0
583 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
584 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
589 dnl Does any necessary configuration of the testsuite directory. Generates
590 dnl the testsuite_hooks.h header.
592 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
596 dnl GLIBCXX_TEST_WCHAR_T
597 dnl GLIBCXX_TEST_THREAD
600 dnl baseline_subdir_switch
602 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
603 if $GLIBCXX_IS_NATIVE ; then
604 # Do checks for resource limit functions.
605 GLIBCXX_CHECK_SETRLIMIT
607 # Look for setenv, so that extended locale tests can be performed.
608 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
611 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
612 test $enable_symvers != no; then
615 enable_abi_check=no ;;
617 enable_abi_check=yes ;;
620 # Only build this as native, since automake does not understand
625 # Export file names for ABI checking.
626 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
627 AC_SUBST(baseline_dir)
628 baseline_subdir_switch="$abi_baseline_subdir_switch"
629 AC_SUBST(baseline_subdir_switch)
634 dnl Does any necessary configuration for docbook in the docs directory.
636 dnl XSLTPROC must be set before this
639 dnl glibcxx_stylesheets
643 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
645 AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
646 glibcxx_stylesheets=no
647 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude http://docbook.sourceforge.net/release/xsl-ns/current/xhtml-1_1/docbook.xsl - 2>/dev/null; then
648 glibcxx_stylesheets=yes
650 AC_MSG_RESULT($glibcxx_stylesheets)
652 AC_MSG_CHECKING([for local stylesheet directory])
653 glibcxx_local_stylesheets=no
654 if test x"$glibcxx_stylesheets" = x"yes"; then
655 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then
656 glibcxx_local_stylesheets=yes
657 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets
659 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then
660 glibcxx_local_stylesheets=yes
661 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
664 AC_MSG_RESULT($glibcxx_local_stylesheets)
666 if test x"$glibcxx_local_stylesheets" = x"yes"; then
667 AC_SUBST(XSL_STYLE_DIR)
668 AC_MSG_NOTICE($XSL_STYLE_DIR)
670 glibcxx_stylesheets=no
673 # Check for epub3 dependencies.
674 AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
675 glibcxx_epub_stylesheets=no
676 if test x"$glibcxx_local_stylesheets" = x"yes"; then
677 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
678 glibcxx_epub_stylesheets=yes
681 AC_MSG_RESULT($glibcxx_epub_stylesheets)
682 AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
688 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
692 dnl TOPLEVEL_INCLUDES
694 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
695 # Used for every C++ compile we perform.
697 -I$glibcxx_builddir/include/$host_alias \
698 -I$glibcxx_builddir/include \
699 -I$glibcxx_srcdir/libsupc++"
701 # For Canadian crosses, pick this up too.
702 if test $CANADIAN = yes; then
703 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
706 # Stuff in the actual top level. Currently only used by libsupc++ to
707 # get unwind* headers from the libgcc dir.
708 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
709 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
711 # Now, export this to all the little Makefiles....
712 AC_SUBST(GLIBCXX_INCLUDES)
713 AC_SUBST(TOPLEVEL_INCLUDES)
718 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
719 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
722 dnl OPTIMIZE_CXXFLAGS
725 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
726 # Optimization flags that are probably a good idea for thrill-seekers. Just
727 # uncomment the lines below and make, everything else is ready to go...
728 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
729 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
730 AC_SUBST(OPTIMIZE_CXXFLAGS)
732 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi'
738 dnl All installation directory information is determined here.
742 dnl glibcxx_prefixdir
743 dnl glibcxx_toolexecdir
744 dnl glibcxx_toolexeclibdir
746 dnl Assumes cross_compiling bits already done, and with_cross_host in
749 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
750 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
751 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
752 glibcxx_toolexecdir=no
753 glibcxx_toolexeclibdir=no
754 glibcxx_prefixdir=$prefix
756 AC_MSG_CHECKING([for gxx-include-dir])
757 AC_ARG_WITH([gxx-include-dir],
758 AC_HELP_STRING([--with-gxx-include-dir=DIR],
759 [installation directory for include files]),
761 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
762 no) gxx_include_dir=no ;;
763 *) gxx_include_dir=$withval ;;
765 [gxx_include_dir=no])
766 AC_MSG_RESULT($gxx_include_dir)
768 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
769 AC_ARG_ENABLE([version-specific-runtime-libs],
770 AC_HELP_STRING([--enable-version-specific-runtime-libs],
771 [Specify that runtime libraries should be installed in a compiler-specific directory]),
772 [case "$enableval" in
773 yes) version_specific_libs=yes ;;
774 no) version_specific_libs=no ;;
775 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
777 [version_specific_libs=no])
778 AC_MSG_RESULT($version_specific_libs)
780 # Default case for install directory for include files.
781 if test $version_specific_libs = no && test $gxx_include_dir = no; then
782 gxx_include_dir='include/c++/${gcc_version}'
783 if test -n "$with_cross_host" &&
784 test x"$with_cross_host" != x"no"; then
785 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
787 gxx_include_dir='${prefix}/'"$gxx_include_dir"
791 # Version-specific runtime libs processing.
792 if test $version_specific_libs = yes; then
793 # Need the gcc compiler version to know where to install libraries
794 # and header files if --enable-version-specific-runtime-libs option
795 # is selected. FIXME: these variables are misnamed, there are
796 # no executables installed in _toolexecdir or _toolexeclibdir.
797 if test x"$gxx_include_dir" = x"no"; then
798 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
800 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
801 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
804 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
805 # Install a library built with a cross compiler in tooldir, not libdir.
806 if test x"$glibcxx_toolexecdir" = x"no"; then
807 if test -n "$with_cross_host" &&
808 test x"$with_cross_host" != x"no"; then
809 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
810 glibcxx_toolexeclibdir='${toolexecdir}/lib'
812 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
813 glibcxx_toolexeclibdir='${libdir}'
815 multi_os_directory=`$CXX -print-multi-os-directory`
816 case $multi_os_directory in
817 .) ;; # Avoid trailing /.
818 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
822 AC_MSG_CHECKING([for install location])
823 AC_MSG_RESULT($gxx_include_dir)
825 AC_SUBST(glibcxx_prefixdir)
826 AC_SUBST(gxx_include_dir)
827 AC_SUBST(glibcxx_toolexecdir)
828 AC_SUBST(glibcxx_toolexeclibdir)
834 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
835 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
836 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
838 dnl See docs/html/17_intro/configury.html#enable for documentation.
840 m4_define([GLIBCXX_ENABLE],[dnl
841 m4_define([_g_switch],[--enable-$1])dnl
842 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
843 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
848 m4_bpatsubst([$5],[permit ])) ;;
849 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
850 dnl Idea for future: generate a URL pointing to
851 dnl "onlinedocs/configopts.html#whatever"
858 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
862 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
863 m4_undefine([_g_switch])dnl
864 m4_undefine([_g_help])dnl
869 dnl Check for ISO/IEC 9899:1999 "C99" support.
871 dnl --enable-c99 defines _GLIBCXX_USE_C99
872 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
873 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
874 dnl Where DEFAULT is either `yes' or `no'.
875 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
877 AC_DEFUN([GLIBCXX_ENABLE_C99], [
878 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
880 if test x"$enable_c99" = x"yes"; then
885 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
886 # undefined and fake C99 facilities - like pre-standard snprintf - may be
887 # spuriously enabled.
888 # Long term, -std=c++0x could be even better, could manage to explicitely
889 # request C99 facilities to the underlying C headers.
890 ac_save_CXXFLAGS="$CXXFLAGS"
891 CXXFLAGS="$CXXFLAGS -std=c++98"
893 ac_save_gcc_no_link="$gcc_no_link"
895 if test x$gcc_no_link != xyes; then
896 # Use -fno-exceptions to that the C driver can link these tests without
897 # hitting undefined references to personality routines.
898 CXXFLAGS="$CXXFLAGS -fno-exceptions"
899 AC_CHECK_LIB(m, sin, [
902 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
907 # Check for the existence of <math.h> functions used if C99 is enabled.
908 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
909 AC_CACHE_VAL(glibcxx_cv_c99_math, [
910 GCC_TRY_COMPILE_OR_LINK(
912 volatile double d1, d2;
920 i = isgreater(d1, d2);
921 i = isgreaterequal(d1, d2);
923 i = islessequal(d1, d2);
924 i = islessgreater(d1, d2);
925 i = islessgreater(d1, d2);
926 i = isunordered(d1, d2);
927 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
929 AC_MSG_RESULT($glibcxx_cv_c99_math)
930 if test x"$glibcxx_cv_c99_math" = x"yes"; then
931 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
932 [Define if C99 functions or macros in <math.h> should be imported
933 in <cmath> in namespace std.])
936 # Check for the existence of <complex.h> complex math functions.
937 # This is necessary even though libstdc++ uses the builtin versions
938 # of these functions, because if the builtin cannot be used, a reference
939 # to the library function is emitted.
940 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
941 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
942 glibcxx_cv_c99_complex=no;
943 if test x"$ac_has_complex_h" = x"yes"; then
944 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
945 GCC_TRY_COMPILE_OR_LINK(
946 [#include <complex.h>
947 typedef __complex__ float float_type;
948 typedef __complex__ double double_type;
949 typedef __complex__ long double ld_type;
950 volatile float_type tmpf;
951 volatile double_type tmpd;
952 volatile ld_type tmpld;
955 volatile long double ld;],
967 tmpf = cpowf(tmpf, tmpf);
980 tmpd = cpow(tmpd, tmpd);
984 tmpld = ccosl(tmpld);
985 tmpld = ccoshl(tmpld);
986 tmpld = cexpl(tmpld);
987 tmpld = clogl(tmpld);
988 tmpld = csinl(tmpld);
989 tmpld = csinhl(tmpld);
990 tmpld = csqrtl(tmpld);
991 tmpld = ctanl(tmpld);
992 tmpld = ctanhl(tmpld);
993 tmpld = cpowl(tmpld, tmpld);
994 tmpld = cprojl(tmpld);
995 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
997 AC_MSG_RESULT($glibcxx_cv_c99_complex)
998 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
999 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
1000 [Define if C99 functions in <complex.h> should be used in
1001 <complex>. Using compiler builtins for these functions requires
1002 corresponding C99 library functions to be present.])
1005 # Check for the existence in <stdio.h> of vscanf, et. al.
1006 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1007 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
1008 GCC_TRY_COMPILE_OR_LINK(
1011 void foo(char* fmt, ...)
1013 va_list args; va_start(args, fmt);
1014 vfscanf(stderr, "%i", args);
1016 vsnprintf(fmt, 0, "%i", args);
1017 vsscanf(fmt, "%i", args);
1019 [snprintf("12", 0, "%i");],
1020 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
1022 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
1024 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1025 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1026 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
1027 GCC_TRY_COMPILE_OR_LINK(
1028 [#include <stdlib.h>
1030 volatile long double ld;
1031 volatile unsigned long long ll;
1034 f = strtof("gnu", &tmp);
1035 ld = strtold("gnu", &tmp);
1036 ll = strtoll("gnu", &tmp, 10);
1037 ll = strtoull("gnu", &tmp, 10);
1039 mydivt = lldiv(10,1);
1044 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
1046 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
1048 # Check for the existence in <wchar.h> of wcstold, etc.
1049 glibcxx_cv_c99_wchar=no;
1050 if test x"$ac_has_wchar_h" = xyes &&
1051 test x"$ac_has_wctype_h" = xyes; then
1052 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1053 AC_TRY_COMPILE([#include <wchar.h>
1060 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
1062 # Checks for wide character functions that may not be present.
1063 # Injection of these is wrapped with guard macros.
1064 # NB: only put functions here, instead of immediately above, if
1065 # absolutely necessary.
1066 AC_TRY_COMPILE([#include <wchar.h>
1067 namespace test { using ::vfwscanf; } ], [],
1068 [AC_DEFINE(HAVE_VFWSCANF,1,
1069 [Defined if vfwscanf exists.])],[])
1071 AC_TRY_COMPILE([#include <wchar.h>
1072 namespace test { using ::vswscanf; } ], [],
1073 [AC_DEFINE(HAVE_VSWSCANF,1,
1074 [Defined if vswscanf exists.])],[])
1076 AC_TRY_COMPILE([#include <wchar.h>
1077 namespace test { using ::vwscanf; } ], [],
1078 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1080 AC_TRY_COMPILE([#include <wchar.h>
1081 namespace test { using ::wcstof; } ], [],
1082 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1084 AC_TRY_COMPILE([#include <wctype.h>],
1085 [ wint_t t; int i = iswblank(t);],
1086 [AC_DEFINE(HAVE_ISWBLANK,1,
1087 [Defined if iswblank exists.])],[])
1089 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1092 # Option parsed, now set things appropriately.
1093 if test x"$glibcxx_cv_c99_math" = x"no" ||
1094 test x"$glibcxx_cv_c99_complex" = x"no" ||
1095 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1096 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1097 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1100 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1101 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1102 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1105 gcc_no_link="$ac_save_gcc_no_link"
1106 LIBS="$ac_save_LIBS"
1107 CXXFLAGS="$ac_save_CXXFLAGS"
1111 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1112 AC_MSG_RESULT($enable_c99)
1117 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1118 dnl implementation of 20.8.5 [time.clock], and 30.2.2 [thread.thread.this]
1119 dnl in the current C++0x working draft.
1121 dnl --enable-libstdcxx-time
1122 dnl --enable-libstdcxx-time=yes
1123 dnl checks for the availability of monotonic and realtime clocks,
1124 dnl nanosleep and sched_yield in libc and libposix4 and, in case, links
1126 dnl --enable-libstdcxx-time=rt
1127 dnl also searches (and, in case, links) librt. Note that this is
1128 dnl not always desirable because, in glibc, for example, in turn it
1129 dnl triggers the linking of libpthread too, which activates locking,
1130 dnl a large overhead for single-thread programs.
1131 dnl --enable-libstdcxx-time=no
1132 dnl --disable-libstdcxx-time
1133 dnl disables the checks completely
1135 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1137 AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
1138 GLIBCXX_ENABLE(libstdcxx-time,$1,[[[=KIND]]],
1139 [use KIND for check type],
1144 ac_save_CXXFLAGS="$CXXFLAGS"
1145 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1146 ac_save_LIBS="$LIBS"
1148 ac_has_clock_monotonic=no
1149 ac_has_clock_realtime=no
1150 AC_MSG_RESULT($enable_libstdcxx_time)
1152 if test x"$enable_libstdcxx_time" != x"no"; then
1154 if test x"$enable_libstdcxx_time" = x"rt"; then
1155 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1156 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1158 AC_SEARCH_LIBS(clock_gettime, [posix4])
1159 AC_SEARCH_LIBS(nanosleep, [posix4])
1162 case "$ac_cv_search_clock_gettime" in
1163 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1166 case "$ac_cv_search_nanosleep" in
1167 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1171 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1173 case "$ac_cv_search_sched_yield" in
1175 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1176 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1177 [ Defined if sched_yield is available. ])
1180 if test x"$enable_libstdcxx_time" = x"rt"; then
1181 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1182 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1183 [ Defined if sched_yield is available. ])
1187 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1188 [ Defined if sched_yield is available. ])
1192 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1194 if test x"$ac_has_unistd_h" = x"yes"; then
1195 AC_MSG_CHECKING([for monotonic clock])
1197 [#include <unistd.h>
1200 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1203 clock_gettime(CLOCK_MONOTONIC, &tp);
1204 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1206 AC_MSG_RESULT($ac_has_clock_monotonic)
1208 AC_MSG_CHECKING([for realtime clock])
1210 [#include <unistd.h>
1213 [#if _POSIX_TIMERS > 0
1216 clock_gettime(CLOCK_REALTIME, &tp);
1217 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1219 AC_MSG_RESULT($ac_has_clock_realtime)
1221 AC_MSG_CHECKING([for nanosleep])
1223 [#include <unistd.h>
1226 [#if _POSIX_TIMERS > 0
1230 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1232 AC_MSG_RESULT($ac_has_nanosleep)
1236 if test x"$ac_has_clock_monotonic" = x"yes"; then
1237 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1238 [ Defined if clock_gettime has monotonic clock support. ])
1241 if test x"$ac_has_clock_realtime" = x"yes"; then
1242 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1243 [ Defined if clock_gettime has realtime clock support. ])
1246 if test x"$ac_has_nanosleep" = x"yes"; then
1247 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1248 [ Defined if nanosleep is available. ])
1251 AC_SUBST(GLIBCXX_LIBS)
1253 CXXFLAGS="$ac_save_CXXFLAGS"
1254 LIBS="$ac_save_LIBS"
1259 dnl Check for gettimeofday, used in the implementation of 20.8.5
1260 dnl [time.clock] in the current C++0x working draft.
1262 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1264 AC_MSG_CHECKING([for gettimeofday])
1268 ac_save_CXXFLAGS="$CXXFLAGS"
1269 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1271 ac_has_gettimeofday=no;
1272 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1273 if test x"$ac_has_sys_time_h" = x"yes"; then
1274 AC_MSG_CHECKING([for gettimeofday])
1275 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1276 [timeval tv; gettimeofday(&tv, 0);],
1277 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1279 AC_MSG_RESULT($ac_has_gettimeofday)
1282 if test x"$ac_has_gettimeofday" = x"yes"; then
1283 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1284 [ Defined if gettimeofday is available. ])
1287 CXXFLAGS="$ac_save_CXXFLAGS"
1292 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1293 dnl facilities in Chapter 8, "C compatibility".
1295 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1300 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1301 # undefined and fake C99 facilities may be spuriously enabled.
1302 ac_save_CXXFLAGS="$CXXFLAGS"
1303 CXXFLAGS="$CXXFLAGS -std=c++98"
1305 # Check for the existence of <complex.h> complex math functions used
1307 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1308 ac_c99_complex_tr1=no;
1309 if test x"$ac_has_complex_h" = x"yes"; then
1310 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1311 AC_TRY_COMPILE([#include <complex.h>],
1312 [typedef __complex__ float float_type; float_type tmpf;
1319 typedef __complex__ double double_type; double_type tmpd;
1326 typedef __complex__ long double ld_type; ld_type tmpld;
1333 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1335 AC_MSG_RESULT($ac_c99_complex_tr1)
1336 if test x"$ac_c99_complex_tr1" = x"yes"; then
1337 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1338 [Define if C99 functions in <complex.h> should be used in
1339 <tr1/complex>. Using compiler builtins for these functions
1340 requires corresponding C99 library functions to be present.])
1343 # Check for the existence of <ctype.h> functions.
1344 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1345 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1346 AC_TRY_COMPILE([#include <ctype.h>],
1350 ],[glibcxx_cv_c99_ctype_tr1=yes],
1351 [glibcxx_cv_c99_ctype_tr1=no])
1353 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1354 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1355 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1356 [Define if C99 functions in <ctype.h> should be imported in
1357 <tr1/cctype> in namespace std::tr1.])
1360 # Check for the existence of <fenv.h> functions.
1361 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1363 if test x"$ac_has_fenv_h" = x"yes"; then
1364 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1365 AC_TRY_COMPILE([#include <fenv.h>],
1370 ret = feclearexcept(except);
1371 ret = fegetexceptflag(pflag, except);
1372 ret = feraiseexcept(except);
1373 ret = fesetexceptflag(pflag, except);
1374 ret = fetestexcept(except);
1376 ret = fesetround(mode);
1377 ret = fegetenv(penv);
1378 ret = feholdexcept(penv);
1379 ret = fesetenv(penv);
1380 ret = feupdateenv(penv);
1381 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1383 AC_MSG_RESULT($ac_c99_fenv_tr1)
1384 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1385 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1386 [Define if C99 functions in <fenv.h> should be imported in
1387 <tr1/cfenv> in namespace std::tr1.])
1390 # Check for the existence of <stdint.h> types.
1391 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1392 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1393 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1394 #define __STDC_CONSTANT_MACROS
1395 #include <stdint.h>],
1396 [typedef int8_t my_int8_t;
1397 my_int8_t i8 = INT8_MIN;
1399 typedef int16_t my_int16_t;
1400 my_int16_t i16 = INT16_MIN;
1402 typedef int32_t my_int32_t;
1403 my_int32_t i32 = INT32_MIN;
1405 typedef int64_t my_int64_t;
1406 my_int64_t i64 = INT64_MIN;
1408 typedef int_fast8_t my_int_fast8_t;
1409 my_int_fast8_t if8 = INT_FAST8_MIN;
1410 if8 = INT_FAST8_MAX;
1411 typedef int_fast16_t my_int_fast16_t;
1412 my_int_fast16_t if16 = INT_FAST16_MIN;
1413 if16 = INT_FAST16_MAX;
1414 typedef int_fast32_t my_int_fast32_t;
1415 my_int_fast32_t if32 = INT_FAST32_MIN;
1416 if32 = INT_FAST32_MAX;
1417 typedef int_fast64_t my_int_fast64_t;
1418 my_int_fast64_t if64 = INT_FAST64_MIN;
1419 if64 = INT_FAST64_MAX;
1420 typedef int_least8_t my_int_least8_t;
1421 my_int_least8_t il8 = INT_LEAST8_MIN;
1422 il8 = INT_LEAST8_MAX;
1423 typedef int_least16_t my_int_least16_t;
1424 my_int_least16_t il16 = INT_LEAST16_MIN;
1425 il16 = INT_LEAST16_MAX;
1426 typedef int_least32_t my_int_least32_t;
1427 my_int_least32_t il32 = INT_LEAST32_MIN;
1428 il32 = INT_LEAST32_MAX;
1429 typedef int_least64_t my_int_least64_t;
1430 my_int_least64_t il64 = INT_LEAST64_MIN;
1431 il64 = INT_LEAST64_MAX;
1432 typedef intmax_t my_intmax_t;
1433 my_intmax_t im = INTMAX_MAX;
1435 typedef intptr_t my_intptr_t;
1436 my_intptr_t ip = INTPTR_MAX;
1438 typedef uint8_t my_uint8_t;
1439 my_uint8_t ui8 = UINT8_MAX;
1441 typedef uint16_t my_uint16_t;
1442 my_uint16_t ui16 = UINT16_MAX;
1444 typedef uint32_t my_uint32_t;
1445 my_uint32_t ui32 = UINT32_MAX;
1447 typedef uint64_t my_uint64_t;
1448 my_uint64_t ui64 = UINT64_MAX;
1450 typedef uint_fast8_t my_uint_fast8_t;
1451 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1452 uif8 = UINT_FAST8_MAX;
1453 typedef uint_fast16_t my_uint_fast16_t;
1454 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1455 uif16 = UINT_FAST16_MAX;
1456 typedef uint_fast32_t my_uint_fast32_t;
1457 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1458 uif32 = UINT_FAST32_MAX;
1459 typedef uint_fast64_t my_uint_fast64_t;
1460 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1461 uif64 = UINT_FAST64_MAX;
1462 typedef uint_least8_t my_uint_least8_t;
1463 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1464 uil8 = UINT_LEAST8_MAX;
1465 typedef uint_least16_t my_uint_least16_t;
1466 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1467 uil16 = UINT_LEAST16_MAX;
1468 typedef uint_least32_t my_uint_least32_t;
1469 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1470 uil32 = UINT_LEAST32_MAX;
1471 typedef uint_least64_t my_uint_least64_t;
1472 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1473 uil64 = UINT_LEAST64_MAX;
1474 typedef uintmax_t my_uintmax_t;
1475 my_uintmax_t uim = UINTMAX_MAX;
1477 typedef uintptr_t my_uintptr_t;
1478 my_uintptr_t uip = UINTPTR_MAX;
1480 ],[glibcxx_cv_c99_stdint_tr1=yes],
1481 [glibcxx_cv_c99_stdint_tr1=no])
1483 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1484 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1485 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1486 [Define if C99 types in <stdint.h> should be imported in
1487 <tr1/cstdint> in namespace std::tr1.])
1490 # Check for the existence of <math.h> functions.
1491 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1492 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1493 AC_TRY_COMPILE([#include <math.h>],
1494 [typedef double_t my_double_t;
1495 typedef float_t my_float_t;
1509 copysignf(0.0f, 0.0f);
1510 copysignl(0.0l, 0.0l);
1527 fmaf(0.0f, 0.0f, 0.0f);
1528 fmal(0.0l, 0.0l, 0.0l);
1571 nextafter(0.0, 0.0);
1572 nextafterf(0.0f, 0.0f);
1573 nextafterl(0.0l, 0.0l);
1574 nexttoward(0.0, 0.0);
1575 nexttowardf(0.0f, 0.0f);
1576 nexttowardl(0.0l, 0.0l);
1577 remainder(0.0, 0.0);
1578 remainderf(0.0f, 0.0f);
1579 remainderl(0.0l, 0.0l);
1580 remquo(0.0, 0.0, 0);
1581 remquof(0.0f, 0.0f, 0);
1582 remquol(0.0l, 0.0l, 0);
1601 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1603 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1604 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1605 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1606 [Define if C99 functions or macros in <math.h> should be imported
1607 in <tr1/cmath> in namespace std::tr1.])
1610 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1611 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1612 ac_c99_inttypes_tr1=no;
1613 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1614 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1615 AC_TRY_COMPILE([#include <inttypes.h>],
1616 [intmax_t i, numer, denom, base;
1619 intmax_t ret = imaxabs(i);
1620 imaxdiv_t dret = imaxdiv(numer, denom);
1621 ret = strtoimax(s, endptr, base);
1622 uintmax_t uret = strtoumax(s, endptr, base);
1623 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1625 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1626 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1627 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1628 [Define if C99 functions in <inttypes.h> should be imported in
1629 <tr1/cinttypes> in namespace std::tr1.])
1632 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't
1633 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1634 ac_c99_inttypes_wchar_t_tr1=no;
1635 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1636 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1637 AC_TRY_COMPILE([#include <inttypes.h>],
1641 intmax_t ret = wcstoimax(s, endptr, base);
1642 uintmax_t uret = wcstoumax(s, endptr, base);
1643 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1644 [ac_c99_inttypes_wchar_t_tr1=no])
1646 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1647 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1648 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1649 [Define if wchar_t C99 functions in <inttypes.h> should be
1650 imported in <tr1/cinttypes> in namespace std::tr1.])
1653 # Check for the existence of the <stdbool.h> header.
1654 AC_CHECK_HEADERS(stdbool.h)
1656 # Check for the existence of the <stdalign.h> header.
1657 AC_CHECK_HEADERS(stdalign.h)
1659 CXXFLAGS="$ac_save_CXXFLAGS"
1664 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1665 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1667 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1669 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1670 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1671 if test -r /dev/random && test -r /dev/urandom; then
1672 glibcxx_cv_random_tr1=yes;
1674 glibcxx_cv_random_tr1=no;
1677 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1679 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1680 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1681 [Define if /dev/random and /dev/urandom are available for
1682 the random_device of TR1 (Chapter 5.1).])
1688 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
1690 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
1692 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
1693 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
1694 [#include <stdio.h>],
1695 [AC_MSG_ERROR([computing EOF failed])])
1697 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
1698 [Define to the value of the EOF integer constant.])
1700 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
1701 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
1702 [#include <stdio.h>],
1703 [AC_MSG_ERROR([computing SEEK_CUR failed])])
1705 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
1706 [Define to the value of the SEEK_CUR integer constant.])
1708 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
1709 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
1710 [#include <stdio.h>],
1711 [AC_MSG_ERROR([computing SEEK_END failed])])
1713 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
1714 [Define to the value of the SEEK_END integer constant.])
1718 dnl Check whether required C++ overloads are present in <math.h>.
1721 AC_DEFUN([GLIBCXX_CHECK_MATH_PROTO], [
1728 # Solaris 8 FCS only had an overload for double std::abs(double) in
1729 # <iso/math_iso.h>. Patches 111721-04 (SPARC) and 112757-01 (x86)
1730 # introduced the full set also found from Solaris 9 onwards.
1731 AC_MSG_CHECKING([for float std::abs(float) overload])
1732 AC_CACHE_VAL(glibcxx_cv_abs_float, [
1733 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1736 inline float abs(float __x)
1737 { return __builtin_fabsf(__x); }
1740 [glibcxx_cv_abs_float=no],
1741 [glibcxx_cv_abs_float=yes]
1744 # autoheader cannot handle indented templates.
1745 AH_VERBATIM([__CORRECT_ISO_CPP_MATH_H_PROTO1],
1746 [/* Define if all C++ overloads are available in <math.h>. */
1747 #if __cplusplus >= 199711L
1748 #undef __CORRECT_ISO_CPP_MATH_H_PROTO1
1750 AH_VERBATIM([__CORRECT_ISO_CPP_MATH_H_PROTO2],
1751 [/* Define if only double std::abs(double) is available in <math.h>. */
1752 #if __cplusplus >= 199711L
1753 #undef __CORRECT_ISO_CPP_MATH_H_PROTO2
1756 if test $glibcxx_cv_abs_float = yes; then
1757 AC_DEFINE(__CORRECT_ISO_CPP_MATH_H_PROTO1)
1759 AC_DEFINE(__CORRECT_ISO_CPP_MATH_H_PROTO2)
1761 AC_MSG_RESULT($glibcxx_cv_abs_float)
1769 dnl Check whether required C++ overloads are present in <stdlib.h>.
1772 AC_DEFUN([GLIBCXX_CHECK_STDLIB_PROTO], [
1779 # Solaris 8 FCS lacked the overloads for long std::abs(long) and
1780 # ldiv_t std::div(long, long) in <iso/stdlib_iso.h>. Patches 109607-02
1781 # (SPARC) and 109608-02 (x86) introduced them.
1782 AC_MSG_CHECKING([for long std::abs(long) overload])
1783 AC_CACHE_VAL(glibcxx_cv_abs_long, [
1784 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1785 [#include <stdlib.h>
1788 abs(long __i) { return labs(__i); }
1791 [glibcxx_cv_abs_long=no],
1792 [glibcxx_cv_abs_long=yes]
1795 # autoheader cannot handle indented templates.
1796 AH_VERBATIM([__CORRECT_ISO_CPP_STDLIB_H_PROTO],
1797 [/* Define if all C++ overloads are available in <stdlib.h>. */
1798 #if __cplusplus >= 199711L
1799 #undef __CORRECT_ISO_CPP_STDLIB_H_PROTO
1801 if test $glibcxx_cv_abs_long = yes; then
1802 AC_DEFINE(__CORRECT_ISO_CPP_STDLIB_H_PROTO, 1)
1804 AC_MSG_RESULT($glibcxx_cv_abs_long)
1812 dnl Check whether required C++ overloads are present in <stdio.h>.
1814 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
1819 AC_MSG_CHECKING([for gets declaration])
1820 AC_CACHE_VAL(glibcxx_cv_gets, [
1821 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1828 [glibcxx_cv_gets=yes],
1829 [glibcxx_cv_gets=no]
1832 if test $glibcxx_cv_gets = yes; then
1833 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
1835 AC_MSG_RESULT($glibcxx_cv_gets)
1841 dnl Check whether macros, etc are present for <system_error>
1843 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1845 m4_pushdef([n_syserr], [1])dnl
1846 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1847 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1848 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
1849 ECHILD, ENOSPC, EPERM,
1850 ETIMEDOUT, EWOULDBLOCK],
1851 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1852 AC_MSG_CHECKING([for syserr])
1853 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1854 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1855 [int i = syserr;])],
1856 [glibcxx_cv_system_error[]n_syserr=yes],
1857 [glibcxx_cv_system_error[]n_syserr=no])
1859 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1860 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1861 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1863 m4_define([n_syserr], m4_incr(n_syserr))dnl
1864 m4_popdef([SYSERR])dnl
1866 m4_popdef([n_syserr])dnl
1870 dnl Check for what type of C headers to use.
1872 dnl --enable-cheaders= [does stuff].
1873 dnl --disable-cheaders [does not do anything, really].
1874 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1875 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1877 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1878 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
1879 [construct "C" headers for g++], [permit c|c_std|c_global])
1880 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1882 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1884 # Allow overrides to configure.host here.
1885 if test $enable_cheaders = c_global; then
1889 AC_SUBST(C_INCLUDE_DIR)
1890 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1891 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1892 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1893 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1898 dnl Check for which locale library to use. The choice is mapped to
1899 dnl a subdirectory of config/locale.
1901 dnl Default is generic.
1903 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1904 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
1905 [use MODEL for target locale package],
1906 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
1908 # Deal with gettext issues. Default to not using it (=no) until we detect
1909 # support for it later. Let the user turn it off via --e/d, but let that
1910 # default to on for easier handling.
1913 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1917 # Either a known package, or "auto"
1918 if test $enable_clocale = no || test $enable_clocale = yes; then
1921 enable_clocale_flag=$enable_clocale
1923 # Probe for locale model to use if none specified.
1924 # Default to "generic".
1925 if test $enable_clocale_flag = auto; then
1926 case ${target_os} in
1927 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1928 enable_clocale_flag=gnu
1931 enable_clocale_flag=darwin
1934 if test x"$with_newlib" = x"yes"; then
1935 enable_clocale_flag=newlib
1937 enable_clocale_flag=generic
1943 # Sanity check model, and test for special functionality.
1944 if test $enable_clocale_flag = gnu; then
1945 AC_EGREP_CPP([_GLIBCXX_ok], [
1946 #include <features.h>
1947 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
1950 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1952 # Set it to scream when it hurts.
1953 ac_save_CFLAGS="$CFLAGS"
1954 CFLAGS="-Wimplicit-function-declaration -Werror"
1956 # Use strxfrm_l if available.
1957 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1959 #include <locale.h>],
1960 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1961 AC_DEFINE(HAVE_STRXFRM_L, 1,
1962 [Define if strxfrm_l is available in <string.h>.]),)
1964 # Use strerror_l if available.
1965 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1967 #include <locale.h>],
1968 [__locale_t loc; strerror_l(5, loc);],
1969 AC_DEFINE(HAVE_STRERROR_L, 1,
1970 [Define if strerror_l is available in <string.h>.]),)
1972 CFLAGS="$ac_save_CFLAGS"
1975 # Perhaps use strerror_r if available, and strerror_l isn't.
1976 ac_save_CFLAGS="$CFLAGS"
1977 CFLAGS="-Wimplicit-function-declaration -Werror"
1978 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1980 #include <locale.h>],
1981 [char s[128]; strerror_r(5, s, 128);],
1982 AC_DEFINE(HAVE_STRERROR_R, 1,
1983 [Define if strerror_r is available in <string.h>.]),)
1984 CFLAGS="$ac_save_CFLAGS"
1986 # Set configure bits for specified locale package
1987 AC_MSG_CHECKING([for C locale to use])
1988 case ${enable_clocale_flag} in
1990 AC_MSG_RESULT(generic)
1992 CLOCALE_H=config/locale/generic/c_locale.h
1993 CLOCALE_CC=config/locale/generic/c_locale.cc
1994 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1995 CCOLLATE_CC=config/locale/generic/collate_members.cc
1996 CCTYPE_CC=config/locale/generic/ctype_members.cc
1997 CMESSAGES_H=config/locale/generic/messages_members.h
1998 CMESSAGES_CC=config/locale/generic/messages_members.cc
1999 CMONEY_CC=config/locale/generic/monetary_members.cc
2000 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2001 CTIME_H=config/locale/generic/time_members.h
2002 CTIME_CC=config/locale/generic/time_members.cc
2003 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2006 AC_MSG_RESULT(darwin or freebsd)
2008 CLOCALE_H=config/locale/generic/c_locale.h
2009 CLOCALE_CC=config/locale/generic/c_locale.cc
2010 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2011 CCOLLATE_CC=config/locale/generic/collate_members.cc
2012 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2013 CMESSAGES_H=config/locale/generic/messages_members.h
2014 CMESSAGES_CC=config/locale/generic/messages_members.cc
2015 CMONEY_CC=config/locale/generic/monetary_members.cc
2016 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2017 CTIME_H=config/locale/generic/time_members.h
2018 CTIME_CC=config/locale/generic/time_members.cc
2019 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2025 # Declare intention to use gettext, and add support for specific
2027 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2030 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2031 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2032 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2035 # Export the build objects.
2036 for ling in $ALL_LINGUAS; do \
2037 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2038 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2040 AC_SUBST(glibcxx_MOFILES)
2041 AC_SUBST(glibcxx_POFILES)
2043 CLOCALE_H=config/locale/gnu/c_locale.h
2044 CLOCALE_CC=config/locale/gnu/c_locale.cc
2045 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2046 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2047 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2048 CMESSAGES_H=config/locale/gnu/messages_members.h
2049 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2050 CMONEY_CC=config/locale/gnu/monetary_members.cc
2051 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2052 CTIME_H=config/locale/gnu/time_members.h
2053 CTIME_CC=config/locale/gnu/time_members.cc
2054 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2057 AC_MSG_RESULT(IEEE 1003.1)
2059 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2060 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2061 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2062 CCOLLATE_CC=config/locale/generic/collate_members.cc
2063 CCTYPE_CC=config/locale/generic/ctype_members.cc
2064 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2065 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2066 CMONEY_CC=config/locale/generic/monetary_members.cc
2067 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2068 CTIME_H=config/locale/generic/time_members.h
2069 CTIME_CC=config/locale/generic/time_members.cc
2070 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2073 AC_MSG_RESULT(newlib)
2075 CLOCALE_H=config/locale/generic/c_locale.h
2076 CLOCALE_CC=config/locale/generic/c_locale.cc
2077 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2078 CCOLLATE_CC=config/locale/generic/collate_members.cc
2079 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2080 CMESSAGES_H=config/locale/generic/messages_members.h
2081 CMESSAGES_CC=config/locale/generic/messages_members.cc
2082 CMONEY_CC=config/locale/generic/monetary_members.cc
2083 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2084 CTIME_H=config/locale/generic/time_members.h
2085 CTIME_CC=config/locale/generic/time_members.cc
2086 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2090 # This is where the testsuite looks for locale catalogs, using the
2091 # -DLOCALEDIR define during testsuite compilation.
2092 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2093 AC_SUBST(glibcxx_localedir)
2095 # A standalone libintl (e.g., GNU libintl) may be in use.
2096 if test $USE_NLS = yes; then
2097 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2098 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2100 if test $USE_NLS = yes; then
2101 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2102 [Define if NLS translations are to be used.])
2107 AC_SUBST(CMESSAGES_H)
2108 AC_SUBST(CCODECVT_CC)
2109 AC_SUBST(CCOLLATE_CC)
2111 AC_SUBST(CMESSAGES_CC)
2113 AC_SUBST(CNUMERIC_CC)
2116 AC_SUBST(CLOCALE_CC)
2117 AC_SUBST(CLOCALE_INTERNAL_H)
2122 dnl Check for which std::allocator base class to use. The choice is
2123 dnl mapped from a subdirectory of include/ext.
2127 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2128 AC_MSG_CHECKING([for std::allocator base class])
2129 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2130 [use KIND for target std::allocator base],
2131 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2133 # If they didn't use this option switch, or if they specified --enable
2134 # with no specific model, we'll have to look for one. If they
2135 # specified --disable (???), do likewise.
2136 if test $enable_libstdcxx_allocator = no ||
2137 test $enable_libstdcxx_allocator = yes;
2139 enable_libstdcxx_allocator=auto
2142 # Either a known package, or "auto". Auto implies the default choice
2143 # for a particular platform.
2144 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2146 # Probe for host-specific support if no specific model is specified.
2148 if test $enable_libstdcxx_allocator_flag = auto; then
2149 case ${target_os} in
2150 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2151 enable_libstdcxx_allocator_flag=new
2154 enable_libstdcxx_allocator_flag=new
2158 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2161 # Set configure bits for specified locale package
2162 case ${enable_libstdcxx_allocator_flag} in
2164 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2165 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2168 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2169 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2172 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2173 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2176 ALLOCATOR_H=config/allocator/new_allocator_base.h
2177 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2180 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2181 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2185 AC_SUBST(ALLOCATOR_H)
2186 AC_SUBST(ALLOCATOR_NAME)
2191 dnl Check for whether the Boost-derived checks should be turned on.
2193 dnl --enable-concept-checks turns them on.
2194 dnl --disable-concept-checks leaves them off.
2195 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2196 dnl Where DEFAULT is either `yes' or `no'.
2198 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2199 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2200 if test $enable_concept_checks = yes; then
2201 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2202 [Define to use concept checking code from the boost libraries.])
2207 dnl Use extern templates.
2209 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2210 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2212 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2213 dnl Where DEFAULT is `yes' or `no'.
2215 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2217 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2219 AC_MSG_CHECKING([for extern template support])
2220 AC_MSG_RESULT([$enable_extern_template])
2222 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2226 dnl Check for parallel mode pre-requisites, including OpenMP support.
2228 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2230 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2234 # See if configured libgomp/omp.h exists. (libgomp may be in
2235 # noconfigdirs but not explicitly disabled.)
2236 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2237 enable_parallel=yes;
2239 AC_MSG_NOTICE([target-libgomp not built])
2242 AC_MSG_CHECKING([for parallel mode support])
2243 AC_MSG_RESULT([$enable_parallel])
2244 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
2249 dnl Check for which I/O library to use: stdio, or something specific.
2251 dnl Default is stdio.
2253 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2254 AC_MSG_CHECKING([for underlying I/O to use])
2255 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2256 [use target-specific I/O package], [permit stdio])
2258 # Now that libio has been removed, you can have any color you want as long
2259 # as it's black. This is one big no-op until other packages are added, but
2260 # showing the framework never hurts.
2261 case ${enable_cstdio} in
2263 CSTDIO_H=config/io/c_io_stdio.h
2264 BASIC_FILE_H=config/io/basic_file_stdio.h
2265 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2266 AC_MSG_RESULT(stdio)
2271 AC_SUBST(BASIC_FILE_H)
2272 AC_SUBST(BASIC_FILE_CC)
2277 dnl Check for "unusual" flags to pass to the compiler while building.
2279 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2280 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2281 dnl --disable-cxx-flags passes nothing.
2282 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2283 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2284 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2285 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2286 dnl If "default flags" is an empty string, the effect is the same
2287 dnl as --disable or --enable=no.
2289 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2290 AC_MSG_CHECKING([for extra compiler flags for building])
2291 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2292 [pass compiler FLAGS when building library],
2293 [case "x$enable_cxx_flags" in
2294 xno | x) enable_cxx_flags= ;;
2296 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2299 # Run through flags (either default or command-line) and set anything
2300 # extra (e.g., #defines) that must accompany particular g++ options.
2301 if test -n "$enable_cxx_flags"; then
2302 for f in $enable_cxx_flags; do
2306 *) # and we're trying to pass /what/ exactly?
2307 AC_MSG_ERROR([compiler flags start with a -]) ;;
2312 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2313 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2314 AC_SUBST(EXTRA_CXX_FLAGS)
2319 dnl Check to see if debugging libraries are to be built.
2321 dnl --enable-libstdcxx-debug
2322 dnl builds a separate set of debugging libraries in addition to the
2323 dnl normal (shared, static) libstdc++ binaries.
2325 dnl --disable-libstdcxx-debug
2326 dnl builds only one (non-debug) version of libstdc++.
2328 dnl --enable-libstdcxx-debug-flags=FLAGS
2329 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2331 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2332 dnl Where DEFAULT is either `yes' or `no'.
2334 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2335 AC_MSG_CHECKING([for additional debug build])
2336 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2337 AC_MSG_RESULT($enable_libstdcxx_debug)
2338 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2343 dnl Check for explicit debug flags.
2345 dnl --enable-libstdcxx-debug-flags='-O1'
2346 dnl is a general method for passing flags to be used when
2347 dnl building debug libraries with --enable-debug.
2349 dnl --disable-libstdcxx-debug-flags does nothing.
2350 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2351 dnl If "default flags" is an empty string, the effect is the same
2352 dnl as --disable or --enable=no.
2354 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2355 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2356 [pass compiler FLAGS when building debug library],
2357 [case "x$enable_libstdcxx_debug_flags" in
2358 xno | x) enable_libstdcxx_debug_flags= ;;
2360 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2363 # Option parsed, now set things appropriately
2364 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2365 AC_SUBST(DEBUG_FLAGS)
2367 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2372 dnl Check if the user only wants a freestanding library implementation.
2374 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2375 dnl installing only the headers required by [17.4.1.3] and the language
2376 dnl support library. More than that will be built (to keep the Makefiles
2377 dnl conveniently clean), but not installed.
2380 dnl is_hosted (yes/no)
2383 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2385 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2386 AC_ARG_ENABLE([hosted-libstdcxx],
2387 AC_HELP_STRING([--disable-hosted-libstdcxx],
2388 [only build freestanding C++ runtime support]),,
2391 enable_hosted_libstdcxx=no
2394 enable_hosted_libstdcxx=yes
2397 if test "$enable_hosted_libstdcxx" = no; then
2398 AC_MSG_NOTICE([Only freestanding libraries will be built])
2402 enable_libstdcxx_pch=no
2407 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2408 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2409 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2414 dnl Check for template specializations for the 'long long' type.
2415 dnl The result determines only whether 'long long' I/O is enabled; things
2416 dnl like numeric_limits<> specializations are always available.
2418 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2419 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2420 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2421 dnl Where DEFAULT is either `yes' or `no'.
2423 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2424 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2425 if test $enable_long_long = yes; then
2426 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2427 [Define if code specialized for long long should be used.])
2429 AC_MSG_CHECKING([for enabled long long specializations])
2430 AC_MSG_RESULT([$enable_long_long])
2435 dnl Check for decimal floating point.
2437 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2439 dnl This checks to see if the host supports decimal floating point types.
2442 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2444 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2446 # Fake what AC_TRY_COMPILE does, without linking as this is
2447 # unnecessary for this test.
2449 cat > conftest.$ac_ext << EOF
2450 [#]line __oline__ "configure"
2460 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2461 if AC_TRY_EVAL(ac_compile); then
2462 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2463 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2468 AC_MSG_RESULT($enable_dfp)
2473 dnl Check for GNU 128-bit integer and floating point types.
2475 dnl Note: also checks that the types aren't standard types.
2478 dnl _GLIBCXX_USE_INT128
2479 dnl _GLIBCXX_USE_FLOAT128
2481 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2486 # Fake what AC_TRY_COMPILE does, without linking as this is
2487 # unnecessary for this test.
2489 cat > conftest.$ac_ext << EOF
2490 [#]line __oline__ "configure"
2491 template<typename T1, typename T2>
2493 { typedef T2 type; };
2495 template<typename T>
2500 typename same<long, __int128>::type i1;
2501 typename same<long long, __int128>::type i2;
2505 AC_MSG_CHECKING([for __int128])
2506 if AC_TRY_EVAL(ac_compile); then
2507 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2508 [Define if __int128 is supported on this host.])
2513 AC_MSG_RESULT($enable_int128)
2516 cat > conftest.$ac_ext << EOF
2517 [#]line __oline__ "configure"
2518 template<typename T1, typename T2>
2520 { typedef T2 type; };
2522 template<typename T>
2527 typename same<double, __float128>::type f1;
2528 typename same<long double, __float128>::type f2;
2532 AC_MSG_CHECKING([for __float128])
2533 if AC_TRY_EVAL(ac_compile); then
2534 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
2535 [Define if __float128 is supported on this host.])
2540 AC_MSG_RESULT($enable_float128)
2547 dnl Check for template specializations for the 'wchar_t' type.
2549 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2550 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2551 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2552 dnl Where DEFAULT is either `yes' or `no'.
2554 dnl Necessary support must also be present.
2556 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2557 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2559 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2560 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2561 AC_MSG_CHECKING([for mbstate_t])
2562 AC_TRY_COMPILE([#include <wchar.h>],
2563 [mbstate_t teststate;],
2564 have_mbstate_t=yes, have_mbstate_t=no)
2565 AC_MSG_RESULT($have_mbstate_t)
2566 if test x"$have_mbstate_t" = xyes; then
2567 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2570 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2572 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2574 if test x"$enable_wchar_t" = x"yes"; then
2579 if test x"$ac_has_wchar_h" = xyes &&
2580 test x"$ac_has_wctype_h" = xyes; then
2581 AC_TRY_COMPILE([#include <wchar.h>
2642 ],[],[], [enable_wchar_t=no])
2650 if test x"$enable_wchar_t" = x"yes"; then
2651 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2652 [Define if code specialized for wchar_t should be used.])
2655 AC_MSG_CHECKING([for enabled wchar_t specializations])
2656 AC_MSG_RESULT([$enable_wchar_t])
2661 dnl Check to see if building and using a C++ precompiled header can be done.
2663 dnl --enable-libstdcxx-pch=yes
2664 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2665 dnl may work, after some light-hearted attempts to puzzle out compiler
2666 dnl support, flip bits on in include/Makefile.am
2668 dnl --disable-libstdcxx-pch
2669 dnl turns off attempts to use or build stdc++.h.gch.
2672 dnl glibcxx_PCHFLAGS
2674 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2675 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2676 if test $enable_libstdcxx_pch = yes; then
2677 AC_CACHE_CHECK([for compiler with PCH support],
2678 [glibcxx_cv_prog_CXX_pch],
2679 [ac_save_CXXFLAGS="$CXXFLAGS"
2680 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2683 echo '#include <math.h>' > conftest.h
2684 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2685 -o conftest.h.gch 1>&5 2>&1 &&
2686 echo '#error "pch failed"' > conftest.h &&
2687 echo '#include "conftest.h"' > conftest.cc &&
2688 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2690 glibcxx_cv_prog_CXX_pch=yes
2692 glibcxx_cv_prog_CXX_pch=no
2695 CXXFLAGS=$ac_save_CXXFLAGS
2698 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2701 AC_MSG_CHECKING([for enabled PCH])
2702 AC_MSG_RESULT([$enable_libstdcxx_pch])
2704 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2705 if test $enable_libstdcxx_pch = yes; then
2706 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2710 AC_SUBST(glibcxx_PCHFLAGS)
2715 dnl Check for atomic builtins.
2717 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
2719 dnl This checks to see if the host supports the compiler-generated
2720 dnl builtins for atomic operations for various integral sizes. Note, this
2721 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2722 dnl that are used should be checked.
2725 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
2727 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2730 old_CXXFLAGS="$CXXFLAGS"
2732 # Do link tests if possible, instead asm tests, limited to some platforms
2733 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
2734 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
2735 atomic_builtins_link_tests=no
2736 if test x$gcc_no_link != xyes; then
2737 # Can do link tests. Limit to some tested platforms
2739 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
2740 atomic_builtins_link_tests=yes
2745 if test x$atomic_builtins_link_tests = xyes; then
2749 CXXFLAGS="$CXXFLAGS -fno-exceptions"
2751 AC_MSG_CHECKING([for atomic builtins for bool])
2752 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
2755 [typedef bool atomic_type;
2759 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2760 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2762 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2763 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2765 [glibcxx_cv_atomic_bool=yes],
2766 [glibcxx_cv_atomic_bool=no])
2768 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2770 AC_MSG_CHECKING([for atomic builtins for short])
2771 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
2774 [typedef short atomic_type;
2778 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2779 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2781 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2782 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2784 [glibcxx_cv_atomic_short=yes],
2785 [glibcxx_cv_atomic_short=no])
2787 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2789 AC_MSG_CHECKING([for atomic builtins for int])
2790 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
2793 [typedef int atomic_type;
2797 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2798 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2800 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2801 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2803 [glibcxx_cv_atomic_int=yes],
2804 [glibcxx_cv_atomic_int=no])
2806 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2808 AC_MSG_CHECKING([for atomic builtins for long long])
2809 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
2812 [typedef long long atomic_type;
2816 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2817 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2819 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2820 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2822 [glibcxx_cv_atomic_long_long=yes],
2823 [glibcxx_cv_atomic_long_long=no])
2825 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2831 # Compile unoptimized.
2834 # Fake what AC_TRY_COMPILE does.
2836 cat > conftest.$ac_ext << EOF
2837 [#]line __oline__ "configure"
2840 typedef bool atomic_type;
2844 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2845 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2847 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2848 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2854 AC_MSG_CHECKING([for atomic builtins for bool])
2855 if AC_TRY_EVAL(ac_compile); then
2856 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2857 glibcxx_cv_atomic_bool=no
2859 glibcxx_cv_atomic_bool=yes
2862 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2865 cat > conftest.$ac_ext << EOF
2866 [#]line __oline__ "configure"
2869 typedef short atomic_type;
2873 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2874 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2876 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2877 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2883 AC_MSG_CHECKING([for atomic builtins for short])
2884 if AC_TRY_EVAL(ac_compile); then
2885 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2886 glibcxx_cv_atomic_short=no
2888 glibcxx_cv_atomic_short=yes
2891 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2894 cat > conftest.$ac_ext << EOF
2895 [#]line __oline__ "configure"
2898 // NB: _Atomic_word not necessarily int.
2899 typedef int atomic_type;
2903 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2904 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2906 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2907 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2913 AC_MSG_CHECKING([for atomic builtins for int])
2914 if AC_TRY_EVAL(ac_compile); then
2915 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2916 glibcxx_cv_atomic_int=no
2918 glibcxx_cv_atomic_int=yes
2921 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2924 cat > conftest.$ac_ext << EOF
2925 [#]line __oline__ "configure"
2928 typedef long long atomic_type;
2932 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2933 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2935 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2936 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2942 AC_MSG_CHECKING([for atomic builtins for long long])
2943 if AC_TRY_EVAL(ac_compile); then
2944 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2945 glibcxx_cv_atomic_long_long=no
2947 glibcxx_cv_atomic_long_long=yes
2950 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2955 CXXFLAGS="$old_CXXFLAGS"
2958 # Set atomicity_dir to builtins if all but the long long test above passes.
2959 if test $glibcxx_cv_atomic_bool = yes \
2960 && test $glibcxx_cv_atomic_short = yes \
2961 && test $glibcxx_cv_atomic_int = yes; then
2962 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2963 [Define if the compiler supports C++11 atomics.])
2964 atomicity_dir=cpu/generic/atomicity_builtins
2967 # If still generic, set to mutex.
2968 if test $atomicity_dir = "cpu/generic" ; then
2969 atomicity_dir=cpu/generic/atomicity_mutex
2970 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2971 if test "x$target_thread_file" = xsingle; then
2972 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2973 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2975 AC_MSG_WARN([They will be faked using a mutex.])
2976 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2984 dnl Check for exception handling support. If an explicit enable/disable
2985 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2986 dnl target may or may not support call frame exceptions.
2988 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2989 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2990 dnl Neither one forces an attempt at detection.
2993 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2995 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2996 AC_MSG_CHECKING([for exception model to use])
2999 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
3000 [force use of builtin_setjmp for exceptions],
3001 [permit yes|no|auto])
3003 if test $enable_sjlj_exceptions = auto; then
3004 # Botheration. Now we've got to detect the exception model. Link tests
3005 # against libgcc.a are problematic since we've not been given proper -L
3006 # bits for single-tree newlib and libgloss.
3008 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
3009 cat > conftest.$ac_ext << EOF
3010 [#]line __oline__ "configure"
3019 old_CXXFLAGS="$CXXFLAGS"
3021 if AC_TRY_EVAL(ac_compile); then
3022 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
3023 enable_sjlj_exceptions=yes
3024 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
3025 enable_sjlj_exceptions=no
3026 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
3027 enable_sjlj_exceptions=no
3030 CXXFLAGS="$old_CXXFLAGS"
3034 # This is a tad weird, for hysterical raisins. We have to map
3035 # enable/disable to two different models.
3036 case $enable_sjlj_exceptions in
3038 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
3039 [Define if the compiler is configured for setjmp/longjmp exceptions.])
3040 ac_exception_model_name=sjlj
3043 ac_exception_model_name="call frame"
3046 AC_MSG_ERROR([unable to detect exception model])
3050 AC_MSG_RESULT($ac_exception_model_name)
3055 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3057 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3058 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3059 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3060 dnl Where DEFAULT is 'yes'.
3062 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3063 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3065 if test x$enable_libstdcxx_visibility = xyes ; then
3066 dnl all hail libgfortran
3067 dnl Check whether the target supports hidden visibility.
3068 AC_CACHE_CHECK([whether the target supports hidden visibility],
3069 glibcxx_cv_have_attribute_visibility, [
3070 save_CFLAGS="$CFLAGS"
3071 CFLAGS="$CFLAGS -Werror"
3072 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3073 [], glibcxx_cv_have_attribute_visibility=yes,
3074 glibcxx_cv_have_attribute_visibility=no)
3075 CFLAGS="$save_CFLAGS"])
3076 if test $glibcxx_cv_have_attribute_visibility = no; then
3077 enable_libstdcxx_visibility=no
3081 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3082 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3087 dnl Add version tags to symbols in shared library (or not), additionally
3088 dnl marking other symbols as private/local (or not).
3090 dnl Sets libtool_VERSION, and determines shared library SONAME.
3092 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3094 dnl --enable-symvers=style adds a version script to the linker call when
3095 dnl creating the shared library. The choice of version script is
3096 dnl controlled by 'style'.
3097 dnl --disable-symvers does not.
3099 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3100 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3101 dnl choose a default style based on linker characteristics. Passing
3102 dnl 'no' disables versioning.
3104 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3106 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3107 [enables symbol versioning of the shared library],
3108 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3110 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3111 # don't know enough about $LD to do tricks...
3112 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3113 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3114 # with extern "C++" in version scripts.
3115 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3117 # Turn a 'yes' into a suitable default.
3118 if test x$enable_symvers = xyes ; then
3119 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3122 if test $with_gnu_ld = yes ; then
3123 case ${target_os} in
3125 enable_symvers=no ;;
3127 enable_symvers=gnu ;;
3130 case ${target_os} in
3132 enable_symvers=darwin ;;
3133 # Sun symbol versioning exists since Solaris 2.5.
3134 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3135 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3136 # version scripts, so disable symbol versioning if none can be
3138 if test -z "$ac_cv_path_CXXFILT"; then
3139 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3140 AC_MSG_WARN([=== no GNU c++filt could be found.])
3141 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3148 enable_symvers=no ;;
3154 # Check to see if 'darwin' or 'darwin-export' can win.
3155 if test x$enable_symvers = xdarwin-export ; then
3156 enable_symvers=darwin
3159 # Check if 'sun' was requested on non-Solaris 2 platforms.
3160 if test x$enable_symvers = xsun ; then
3161 case ${target_os} in
3167 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3168 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3169 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3175 # Check to see if 'gnu' can win.
3176 if test $enable_symvers = gnu ||
3177 test $enable_symvers = gnu-versioned-namespace ||
3178 test $enable_symvers = sun; then
3179 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3180 AC_MSG_CHECKING([for shared libgcc])
3181 ac_save_CFLAGS="$CFLAGS"
3183 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3184 CFLAGS="$ac_save_CFLAGS"
3185 if test $glibcxx_shared_libgcc = no; then
3186 cat > conftest.c <<EOF
3187 int main (void) { return 0; }
3190 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3191 -shared -shared-libgcc -o conftest.so \
3192 conftest.c -v 2>&1 >/dev/null \
3193 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3195 rm -f conftest.c conftest.so
3196 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3197 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3198 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3199 CFLAGS="$ac_save_CFLAGS"
3202 AC_MSG_RESULT($glibcxx_shared_libgcc)
3204 # For GNU ld, we need at least this version. The format is described in
3205 # GLIBCXX_CHECK_LINKER_FEATURES above.
3206 glibcxx_min_gnu_ld_version=21400
3208 # If no shared libgcc, can't win.
3209 if test $glibcxx_shared_libgcc != yes; then
3210 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3211 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3212 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3214 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3215 : All interesting versions of Sun ld support sun style symbol versioning.
3216 elif test $with_gnu_ld != yes ; then
3218 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3219 AC_MSG_WARN([=== you are not using the GNU linker.])
3220 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3222 elif test $glibcxx_ld_is_gold = yes ; then
3223 : All versions of gold support symbol versioning.
3224 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3225 # The right tools, the right setup, but too old. Fallbacks?
3226 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3227 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3228 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3229 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3230 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3235 # For libtool versioning info, format is CURRENT:REVISION:AGE
3236 libtool_VERSION=6:17:0
3238 # Everything parsed; figure out what files and settings to use.
3239 case $enable_symvers in
3241 SYMVER_FILE=config/abi/pre/none.ver
3244 SYMVER_FILE=config/abi/pre/gnu.ver
3245 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3246 [Define to use GNU versioning in the shared library.])
3248 gnu-versioned-namespace)
3249 libtool_VERSION=7:0:0
3250 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3251 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3252 [Define to use GNU namespace versioning in the shared library.])
3255 SYMVER_FILE=config/abi/pre/gnu.ver
3256 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3257 [Define to use darwin versioning in the shared library.])
3260 SYMVER_FILE=config/abi/pre/gnu.ver
3261 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3262 [Define to use Sun versioning in the shared library.])
3266 if test x$enable_symvers != xno ; then
3267 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3268 [Define to use symbol versioning in the shared library.])
3271 AC_CACHE_CHECK([whether the target supports .symver directive],
3272 glibcxx_cv_have_as_symver_directive, [
3273 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3274 [], glibcxx_cv_have_as_symver_directive=yes,
3275 glibcxx_cv_have_as_symver_directive=no)])
3276 if test $glibcxx_cv_have_as_symver_directive = yes; then
3277 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3278 [Define to 1 if the target assembler supports .symver directive.])
3281 AC_SUBST(SYMVER_FILE)
3282 AC_SUBST(port_specific_symbol_files)
3283 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3284 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3285 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3286 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3287 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3288 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3290 if test $enable_symvers != no ; then
3291 case ${target_os} in
3292 # The Solaris 2 runtime linker doesn't support the GNU extension of
3293 # binding the same symbol to different versions
3296 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3298 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3299 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3304 # Now, set up compatibility support, if any.
3305 # In addition, need this to deal with std::size_t mangling in
3306 # src/compatibility.cc. In a perfect world, could use
3307 # typeid(std::size_t).name()[0] to do direct substitution.
3308 AC_MSG_CHECKING([for size_t as unsigned int])
3309 ac_save_CFLAGS="$CFLAGS"
3311 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3312 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3313 CFLAGS=$ac_save_CFLAGS
3314 if test "$glibcxx_size_t_is_i" = yes; then
3315 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3317 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3319 AC_MSG_CHECKING([for ptrdiff_t as int])
3320 ac_save_CFLAGS="$CFLAGS"
3322 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3323 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3324 CFLAGS=$ac_save_CFLAGS
3325 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3326 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3328 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3333 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3334 dnl We must stage the required headers so that they will be installed
3335 dnl with the library (unlike libgcc, the STL implementation is provided
3336 dnl solely within headers). Since we must not inject random user-space
3337 dnl macro names into user-provided C++ code, we first stage into <file>-in
3338 dnl and process to <file> with an output command. The reason for a two-
3339 dnl stage process here is to correctly handle $srcdir!=$objdir without
3340 dnl having to write complex code (the sed commands to clean the macro
3341 dnl namespace are complex and fragile enough as it is). We must also
3342 dnl add a relative path so that -I- is supported properly.
3344 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3345 AC_MSG_CHECKING([for thread model used by GCC])
3346 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3347 AC_MSG_RESULT([$target_thread_file])
3352 dnl Check if gthread implementation defines the types and functions
3353 dnl required by the c++0x thread library. Conforming gthread
3354 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3356 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3358 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3359 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3361 if test x$enable_libstdcxx_threads = xauto ||
3362 test x$enable_libstdcxx_threads = xyes; then
3367 ac_save_CXXFLAGS="$CXXFLAGS"
3368 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3369 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3371 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3372 case $target_thread_file in
3374 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3377 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3379 AC_TRY_COMPILE([#include <unistd.h>],
3381 // In case of POSIX threads check _POSIX_TIMEOUTS.
3382 #if (defined(_PTHREADS) \
3383 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3386 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3388 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3389 [Define to 1 if mutex_timedlock is available.])
3391 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3392 else res_mutex_timedlock=no ; fi
3393 AC_MSG_RESULT([$res_mutex_timedlock])
3395 AC_MSG_CHECKING([for gthreads library])
3397 AC_TRY_COMPILE([#include "gthr.h"],
3399 #ifndef __GTHREADS_CXX0X
3402 ], [case $target_os in
3403 # gthreads support breaks symbol versioning on Solaris 8/9 (PR
3406 if test x$enable_symvers = xno; then
3408 elif test x$enable_libstdcxx_threads = xyes; then
3409 AC_MSG_WARN([You have requested C++11 threads support, but])
3410 AC_MSG_WARN([this breaks symbol versioning.])
3420 [ac_has_gthreads=no])
3425 AC_MSG_RESULT([$ac_has_gthreads])
3427 if test x"$ac_has_gthreads" = x"yes"; then
3428 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3429 [Define if gthreads library is available.])
3432 CXXFLAGS="$ac_save_CXXFLAGS"
3437 # Check whether LC_MESSAGES is available in <locale.h>.
3438 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3440 # This file file be copied and used freely without restrictions. It can
3441 # be used in projects which are not available under the GNU Public License
3442 # but which still want to provide support for the GNU gettext functionality.
3443 # Please note that the actual code is *not* freely available.
3444 AC_DEFUN([AC_LC_MESSAGES], [
3445 AC_CHECK_HEADER(locale.h, [
3446 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3447 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3448 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3449 if test $ac_cv_val_LC_MESSAGES = yes; then
3450 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3451 [Define if LC_MESSAGES is available in <locale.h>.])
3457 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3459 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3463 ac_save_CXXFLAGS="$CXXFLAGS"
3464 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3466 AC_MSG_CHECKING([for get_nprocs])
3467 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3468 GCC_TRY_COMPILE_OR_LINK(
3469 [#include <sys/sysinfo.h>],
3470 [int n = get_nprocs();],
3471 [glibcxx_cv_GET_NPROCS=yes],
3472 [glibcxx_cv_GET_NPROCS=no])
3474 if test $glibcxx_cv_GET_NPROCS = yes; then
3475 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3477 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3479 CXXFLAGS="$ac_save_CXXFLAGS"
3484 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3486 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3490 ac_save_CXXFLAGS="$CXXFLAGS"
3491 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3493 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3494 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3495 GCC_TRY_COMPILE_OR_LINK(
3496 [#include <unistd.h>],
3497 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3498 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3499 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3501 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3502 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3504 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3506 CXXFLAGS="$ac_save_CXXFLAGS"
3511 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3513 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3517 ac_save_CXXFLAGS="$CXXFLAGS"
3518 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3520 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3521 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3522 GCC_TRY_COMPILE_OR_LINK(
3523 [#include <unistd.h>],
3524 [int n = sysconf(_SC_NPROC_ONLN);],
3525 [glibcxx_cv_SC_NPROC_ONLN=yes],
3526 [glibcxx_cv_SC_NPROC_ONLN=no])
3528 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3529 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3531 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3533 CXXFLAGS="$ac_save_CXXFLAGS"
3538 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3540 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3544 ac_save_CXXFLAGS="$CXXFLAGS"
3545 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3547 AC_MSG_CHECKING([for pthreads_num_processors_np])
3548 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3549 GCC_TRY_COMPILE_OR_LINK(
3550 [#include <pthread.h>],
3551 [int n = pthread_num_processors_np();],
3552 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3553 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3555 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3556 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3558 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3560 CXXFLAGS="$ac_save_CXXFLAGS"
3565 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3567 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
3571 ac_save_CXXFLAGS="$CXXFLAGS"
3572 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3574 AC_MSG_CHECKING([for hw.ncpu sysctl])
3575 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
3576 GCC_TRY_COMPILE_OR_LINK(
3579 #include <sys/sysctl.h>
3583 size_t size = sizeof(count);
3584 int mib[] = { CTL_HW, HW_NCPU };
3585 sysctl(mib, 2, &count, &size, NULL, 0);
3587 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
3588 [glibcxx_cv_SYSCTL_HW_NCPU=no])
3590 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
3591 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
3593 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
3595 CXXFLAGS="$ac_save_CXXFLAGS"
3600 dnl Check to see if python pretty printing can be activated.
3602 dnl --with-python-dir=dir
3603 dnl installs directory into $prefix/dir
3604 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
3606 AC_MSG_CHECKING([for custom python install directory])
3607 AC_ARG_WITH([python-dir],
3608 AS_HELP_STRING([--with-python-dir],
3609 [the location to install Python modules. This path is relative starting from the prefix.]),
3610 [with_python_dir=$withval], [with_python_dir="no"])
3611 AC_MSG_RESULT(${with_python_dir})
3613 # Needed for installing Python modules during make install.
3614 python_mod_dir="${with_python_dir}"
3615 AC_SUBST(python_mod_dir)
3616 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
3620 dnl Check to see if -Werror is disabled.
3622 dnl --enable-werror/--disable-werror
3623 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
3624 AC_MSG_CHECKING([for -Werror])
3625 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
3626 AC_MSG_RESULT($enable_werror)
3627 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
3631 # Macros from the top-level gcc directory.
3632 m4_include([../config/gc++filt.m4])
3633 m4_include([../config/tls.m4])