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 $host.
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_builddir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ python src doc po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${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 of the documentation directory.
636 dnl XSLTPROC must be set before this
639 dnl glibcxx_stylesheets
643 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
645 AC_MSG_CHECKING([for stylesheets used in generation of documentation])
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
676 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
680 dnl TOPLEVEL_INCLUDES
682 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
683 # Used for every C++ compile we perform.
685 -I$glibcxx_builddir/include/$host_alias \
686 -I$glibcxx_builddir/include \
687 -I$glibcxx_srcdir/libsupc++"
689 # For Canadian crosses, pick this up too.
690 if test $CANADIAN = yes; then
691 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
694 # Stuff in the actual top level. Currently only used by libsupc++ to
695 # get unwind* headers from the libgcc dir.
696 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
697 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
699 # Now, export this to all the little Makefiles....
700 AC_SUBST(GLIBCXX_INCLUDES)
701 AC_SUBST(TOPLEVEL_INCLUDES)
706 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
707 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
710 dnl OPTIMIZE_CXXFLAGS
713 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
714 # Optimization flags that are probably a good idea for thrill-seekers. Just
715 # uncomment the lines below and make, everything else is ready to go...
716 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
717 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
718 AC_SUBST(OPTIMIZE_CXXFLAGS)
720 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
726 dnl All installation directory information is determined here.
730 dnl glibcxx_prefixdir
731 dnl glibcxx_toolexecdir
732 dnl glibcxx_toolexeclibdir
734 dnl Assumes cross_compiling bits already done, and with_cross_host in
737 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
738 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
739 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
740 glibcxx_toolexecdir=no
741 glibcxx_toolexeclibdir=no
742 glibcxx_prefixdir=$prefix
744 AC_MSG_CHECKING([for gxx-include-dir])
745 AC_ARG_WITH([gxx-include-dir],
746 AC_HELP_STRING([--with-gxx-include-dir=DIR],
747 [installation directory for include files]),
749 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
750 no) gxx_include_dir=no ;;
751 *) gxx_include_dir=$withval ;;
753 [gxx_include_dir=no])
754 AC_MSG_RESULT($gxx_include_dir)
756 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
757 AC_ARG_ENABLE([version-specific-runtime-libs],
758 AC_HELP_STRING([--enable-version-specific-runtime-libs],
759 [Specify that runtime libraries should be installed in a compiler-specific directory]),
760 [case "$enableval" in
761 yes) version_specific_libs=yes ;;
762 no) version_specific_libs=no ;;
763 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
765 [version_specific_libs=no])
766 AC_MSG_RESULT($version_specific_libs)
768 # Default case for install directory for include files.
769 if test $version_specific_libs = no && test $gxx_include_dir = no; then
770 gxx_include_dir='include/c++/${gcc_version}'
771 if test -n "$with_cross_host" &&
772 test x"$with_cross_host" != x"no"; then
773 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
775 gxx_include_dir='${prefix}/'"$gxx_include_dir"
779 # Version-specific runtime libs processing.
780 if test $version_specific_libs = yes; then
781 # Need the gcc compiler version to know where to install libraries
782 # and header files if --enable-version-specific-runtime-libs option
783 # is selected. FIXME: these variables are misnamed, there are
784 # no executables installed in _toolexecdir or _toolexeclibdir.
785 if test x"$gxx_include_dir" = x"no"; then
786 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
788 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
789 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
792 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
793 # Install a library built with a cross compiler in tooldir, not libdir.
794 if test x"$glibcxx_toolexecdir" = x"no"; then
795 if test -n "$with_cross_host" &&
796 test x"$with_cross_host" != x"no"; then
797 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
798 glibcxx_toolexeclibdir='${toolexecdir}/lib'
800 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
801 glibcxx_toolexeclibdir='${libdir}'
803 multi_os_directory=`$CXX -print-multi-os-directory`
804 case $multi_os_directory in
805 .) ;; # Avoid trailing /.
806 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
810 AC_MSG_CHECKING([for install location])
811 AC_MSG_RESULT($gxx_include_dir)
813 AC_SUBST(glibcxx_prefixdir)
814 AC_SUBST(gxx_include_dir)
815 AC_SUBST(glibcxx_toolexecdir)
816 AC_SUBST(glibcxx_toolexeclibdir)
822 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
823 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
824 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
826 dnl See docs/html/17_intro/configury.html#enable for documentation.
828 m4_define([GLIBCXX_ENABLE],[dnl
829 m4_define([_g_switch],[--enable-$1])dnl
830 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
831 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
836 m4_bpatsubst([$5],[permit ])) ;;
837 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
838 dnl Idea for future: generate a URL pointing to
839 dnl "onlinedocs/configopts.html#whatever"
846 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
850 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
851 m4_undefine([_g_switch])dnl
852 m4_undefine([_g_help])dnl
857 dnl Check for ISO/IEC 9899:1999 "C99" support.
859 dnl --enable-c99 defines _GLIBCXX_USE_C99
860 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
861 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
862 dnl Where DEFAULT is either `yes' or `no'.
863 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
865 AC_DEFUN([GLIBCXX_ENABLE_C99], [
866 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
868 if test x"$enable_c99" = x"yes"; then
873 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
874 # undefined and fake C99 facilities - like pre-standard snprintf - may be
875 # spuriously enabled.
876 # Long term, -std=c++0x could be even better, could manage to explicitely
877 # request C99 facilities to the underlying C headers.
878 ac_save_CXXFLAGS="$CXXFLAGS"
879 CXXFLAGS="$CXXFLAGS -std=c++98"
881 ac_save_gcc_no_link="$gcc_no_link"
883 if test x$gcc_no_link != xyes; then
884 # Use -fno-exceptions to that the C driver can link these tests without
885 # hitting undefined references to personality routines.
886 CXXFLAGS="$CXXFLAGS -fno-exceptions"
887 AC_CHECK_LIB(m, sin, [
890 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
895 # Check for the existence of <math.h> functions used if C99 is enabled.
896 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
897 AC_CACHE_VAL(glibcxx_cv_c99_math, [
898 GCC_TRY_COMPILE_OR_LINK(
900 volatile double d1, d2;
908 i = isgreater(d1, d2);
909 i = isgreaterequal(d1, d2);
911 i = islessequal(d1, d2);
912 i = islessgreater(d1, d2);
913 i = islessgreater(d1, d2);
914 i = isunordered(d1, d2);
915 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
917 AC_MSG_RESULT($glibcxx_cv_c99_math)
918 if test x"$glibcxx_cv_c99_math" = x"yes"; then
919 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
920 [Define if C99 functions or macros in <math.h> should be imported
921 in <cmath> in namespace std.])
924 # Check for the existence of <complex.h> complex math functions.
925 # This is necessary even though libstdc++ uses the builtin versions
926 # of these functions, because if the builtin cannot be used, a reference
927 # to the library function is emitted.
928 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
929 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
930 glibcxx_cv_c99_complex=no;
931 if test x"$ac_has_complex_h" = x"yes"; then
932 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
933 GCC_TRY_COMPILE_OR_LINK(
934 [#include <complex.h>
935 typedef __complex__ float float_type;
936 typedef __complex__ double double_type;
937 typedef __complex__ long double ld_type;
938 volatile float_type tmpf;
939 volatile double_type tmpd;
940 volatile ld_type tmpld;
943 volatile long double ld;],
955 tmpf = cpowf(tmpf, tmpf);
968 tmpd = cpow(tmpd, tmpd);
972 tmpld = ccosl(tmpld);
973 tmpld = ccoshl(tmpld);
974 tmpld = cexpl(tmpld);
975 tmpld = clogl(tmpld);
976 tmpld = csinl(tmpld);
977 tmpld = csinhl(tmpld);
978 tmpld = csqrtl(tmpld);
979 tmpld = ctanl(tmpld);
980 tmpld = ctanhl(tmpld);
981 tmpld = cpowl(tmpld, tmpld);
982 tmpld = cprojl(tmpld);
983 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
985 AC_MSG_RESULT($glibcxx_cv_c99_complex)
986 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
987 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
988 [Define if C99 functions in <complex.h> should be used in
989 <complex>. Using compiler builtins for these functions requires
990 corresponding C99 library functions to be present.])
993 # Check for the existence in <stdio.h> of vscanf, et. al.
994 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
995 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
996 GCC_TRY_COMPILE_OR_LINK(
999 void foo(char* fmt, ...)
1001 va_list args; va_start(args, fmt);
1002 vfscanf(stderr, "%i", args);
1004 vsnprintf(fmt, 0, "%i", args);
1005 vsscanf(fmt, "%i", args);
1007 [snprintf("12", 0, "%i");],
1008 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
1010 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
1012 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1013 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1014 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
1015 GCC_TRY_COMPILE_OR_LINK(
1016 [#include <stdlib.h>
1018 volatile long double ld;
1019 volatile unsigned long long ll;
1022 f = strtof("gnu", &tmp);
1023 ld = strtold("gnu", &tmp);
1024 ll = strtoll("gnu", &tmp, 10);
1025 ll = strtoull("gnu", &tmp, 10);
1027 mydivt = lldiv(10,1);
1032 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
1034 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
1036 # Check for the existence in <wchar.h> of wcstold, etc.
1037 glibcxx_cv_c99_wchar=no;
1038 if test x"$ac_has_wchar_h" = xyes &&
1039 test x"$ac_has_wctype_h" = xyes; then
1040 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1041 AC_TRY_COMPILE([#include <wchar.h>
1048 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
1050 # Checks for wide character functions that may not be present.
1051 # Injection of these is wrapped with guard macros.
1052 # NB: only put functions here, instead of immediately above, if
1053 # absolutely necessary.
1054 AC_TRY_COMPILE([#include <wchar.h>
1055 namespace test { using ::vfwscanf; } ], [],
1056 [AC_DEFINE(HAVE_VFWSCANF,1,
1057 [Defined if vfwscanf exists.])],[])
1059 AC_TRY_COMPILE([#include <wchar.h>
1060 namespace test { using ::vswscanf; } ], [],
1061 [AC_DEFINE(HAVE_VSWSCANF,1,
1062 [Defined if vswscanf exists.])],[])
1064 AC_TRY_COMPILE([#include <wchar.h>
1065 namespace test { using ::vwscanf; } ], [],
1066 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1068 AC_TRY_COMPILE([#include <wchar.h>
1069 namespace test { using ::wcstof; } ], [],
1070 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1072 AC_TRY_COMPILE([#include <wctype.h>],
1073 [ wint_t t; int i = iswblank(t);],
1074 [AC_DEFINE(HAVE_ISWBLANK,1,
1075 [Defined if iswblank exists.])],[])
1077 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1080 # Option parsed, now set things appropriately.
1081 if test x"$glibcxx_cv_c99_math" = x"no" ||
1082 test x"$glibcxx_cv_c99_complex" = x"no" ||
1083 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1084 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1085 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1088 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1089 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1090 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1093 gcc_no_link="$ac_save_gcc_no_link"
1094 LIBS="$ac_save_LIBS"
1095 CXXFLAGS="$ac_save_CXXFLAGS"
1099 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1100 AC_MSG_RESULT($enable_c99)
1105 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1106 dnl implementation of 20.8.5 [time.clock], and 30.2.2 [thread.thread.this]
1107 dnl in the current C++0x working draft.
1109 dnl --enable-libstdcxx-time
1110 dnl --enable-libstdcxx-time=yes
1111 dnl checks for the availability of monotonic and realtime clocks,
1112 dnl nanosleep and sched_yield in libc and libposix4 and, in case, links
1114 dnl --enable-libstdcxx-time=rt
1115 dnl also searches (and, in case, links) librt. Note that this is
1116 dnl not always desirable because, in glibc, for example, in turn it
1117 dnl triggers the linking of libpthread too, which activates locking,
1118 dnl a large overhead for single-thread programs.
1119 dnl --enable-libstdcxx-time=no
1120 dnl --disable-libstdcxx-time
1121 dnl disables the checks completely
1123 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1125 AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
1126 GLIBCXX_ENABLE(libstdcxx-time,$1,[[[=KIND]]],
1127 [use KIND for check type],
1132 ac_save_CXXFLAGS="$CXXFLAGS"
1133 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1134 ac_save_LIBS="$LIBS"
1136 ac_has_clock_monotonic=no
1137 ac_has_clock_realtime=no
1138 AC_MSG_RESULT($enable_libstdcxx_time)
1140 if test x"$enable_libstdcxx_time" != x"no"; then
1142 if test x"$enable_libstdcxx_time" = x"rt"; then
1143 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1144 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1146 AC_SEARCH_LIBS(clock_gettime, [posix4])
1147 AC_SEARCH_LIBS(nanosleep, [posix4])
1150 case "$ac_cv_search_clock_gettime" in
1151 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1154 case "$ac_cv_search_nanosleep" in
1155 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1159 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1161 case "$ac_cv_search_sched_yield" in
1163 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1164 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1165 [ Defined if sched_yield is available. ])
1168 if test x"$enable_libstdcxx_time" = x"rt"; then
1169 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1170 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1171 [ Defined if sched_yield is available. ])
1175 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1176 [ Defined if sched_yield is available. ])
1180 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1182 if test x"$ac_has_unistd_h" = x"yes"; then
1183 AC_MSG_CHECKING([for monotonic clock])
1185 [#include <unistd.h>
1188 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1191 clock_gettime(CLOCK_MONOTONIC, &tp);
1192 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1194 AC_MSG_RESULT($ac_has_clock_monotonic)
1196 AC_MSG_CHECKING([for realtime clock])
1198 [#include <unistd.h>
1201 [#if _POSIX_TIMERS > 0
1204 clock_gettime(CLOCK_REALTIME, &tp);
1205 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1207 AC_MSG_RESULT($ac_has_clock_realtime)
1209 AC_MSG_CHECKING([for nanosleep])
1211 [#include <unistd.h>
1214 [#if _POSIX_TIMERS > 0
1218 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1220 AC_MSG_RESULT($ac_has_nanosleep)
1224 if test x"$ac_has_clock_monotonic" = x"yes"; then
1225 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1226 [ Defined if clock_gettime has monotonic clock support. ])
1229 if test x"$ac_has_clock_realtime" = x"yes"; then
1230 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1231 [ Defined if clock_gettime has realtime clock support. ])
1234 if test x"$ac_has_nanosleep" = x"yes"; then
1235 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1236 [ Defined if nanosleep is available. ])
1239 AC_SUBST(GLIBCXX_LIBS)
1241 CXXFLAGS="$ac_save_CXXFLAGS"
1242 LIBS="$ac_save_LIBS"
1247 dnl Check for gettimeofday, used in the implementation of 20.8.5
1248 dnl [time.clock] in the current C++0x working draft.
1250 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1252 AC_MSG_CHECKING([for gettimeofday])
1256 ac_save_CXXFLAGS="$CXXFLAGS"
1257 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1259 ac_has_gettimeofday=no;
1260 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1261 if test x"$ac_has_sys_time_h" = x"yes"; then
1262 AC_MSG_CHECKING([for gettimeofday])
1263 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1264 [timeval tv; gettimeofday(&tv, 0);],
1265 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1267 AC_MSG_RESULT($ac_has_gettimeofday)
1270 if test x"$ac_has_gettimeofday" = x"yes"; then
1271 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1272 [ Defined if gettimeofday is available. ])
1275 CXXFLAGS="$ac_save_CXXFLAGS"
1280 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1281 dnl facilities in Chapter 8, "C compatibility".
1283 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1288 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1289 # undefined and fake C99 facilities may be spuriously enabled.
1290 ac_save_CXXFLAGS="$CXXFLAGS"
1291 CXXFLAGS="$CXXFLAGS -std=c++98"
1293 # Check for the existence of <complex.h> complex math functions used
1295 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1296 ac_c99_complex_tr1=no;
1297 if test x"$ac_has_complex_h" = x"yes"; then
1298 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1299 AC_TRY_COMPILE([#include <complex.h>],
1300 [typedef __complex__ float float_type; float_type tmpf;
1307 typedef __complex__ double double_type; double_type tmpd;
1314 typedef __complex__ long double ld_type; ld_type tmpld;
1321 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1323 AC_MSG_RESULT($ac_c99_complex_tr1)
1324 if test x"$ac_c99_complex_tr1" = x"yes"; then
1325 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1326 [Define if C99 functions in <complex.h> should be used in
1327 <tr1/complex>. Using compiler builtins for these functions
1328 requires corresponding C99 library functions to be present.])
1331 # Check for the existence of <ctype.h> functions.
1332 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1333 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1334 AC_TRY_COMPILE([#include <ctype.h>],
1338 ],[glibcxx_cv_c99_ctype_tr1=yes],
1339 [glibcxx_cv_c99_ctype_tr1=no])
1341 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1342 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1343 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1344 [Define if C99 functions in <ctype.h> should be imported in
1345 <tr1/cctype> in namespace std::tr1.])
1348 # Check for the existence of <fenv.h> functions.
1349 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1351 if test x"$ac_has_fenv_h" = x"yes"; then
1352 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1353 AC_TRY_COMPILE([#include <fenv.h>],
1358 ret = feclearexcept(except);
1359 ret = fegetexceptflag(pflag, except);
1360 ret = feraiseexcept(except);
1361 ret = fesetexceptflag(pflag, except);
1362 ret = fetestexcept(except);
1364 ret = fesetround(mode);
1365 ret = fegetenv(penv);
1366 ret = feholdexcept(penv);
1367 ret = fesetenv(penv);
1368 ret = feupdateenv(penv);
1369 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1371 AC_MSG_RESULT($ac_c99_fenv_tr1)
1372 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1373 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1374 [Define if C99 functions in <fenv.h> should be imported in
1375 <tr1/cfenv> in namespace std::tr1.])
1378 # Check for the existence of <stdint.h> types.
1379 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1380 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1381 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1382 #define __STDC_CONSTANT_MACROS
1383 #include <stdint.h>],
1384 [typedef int8_t my_int8_t;
1385 my_int8_t i8 = INT8_MIN;
1387 typedef int16_t my_int16_t;
1388 my_int16_t i16 = INT16_MIN;
1390 typedef int32_t my_int32_t;
1391 my_int32_t i32 = INT32_MIN;
1393 typedef int64_t my_int64_t;
1394 my_int64_t i64 = INT64_MIN;
1396 typedef int_fast8_t my_int_fast8_t;
1397 my_int_fast8_t if8 = INT_FAST8_MIN;
1398 if8 = INT_FAST8_MAX;
1399 typedef int_fast16_t my_int_fast16_t;
1400 my_int_fast16_t if16 = INT_FAST16_MIN;
1401 if16 = INT_FAST16_MAX;
1402 typedef int_fast32_t my_int_fast32_t;
1403 my_int_fast32_t if32 = INT_FAST32_MIN;
1404 if32 = INT_FAST32_MAX;
1405 typedef int_fast64_t my_int_fast64_t;
1406 my_int_fast64_t if64 = INT_FAST64_MIN;
1407 if64 = INT_FAST64_MAX;
1408 typedef int_least8_t my_int_least8_t;
1409 my_int_least8_t il8 = INT_LEAST8_MIN;
1410 il8 = INT_LEAST8_MAX;
1411 typedef int_least16_t my_int_least16_t;
1412 my_int_least16_t il16 = INT_LEAST16_MIN;
1413 il16 = INT_LEAST16_MAX;
1414 typedef int_least32_t my_int_least32_t;
1415 my_int_least32_t il32 = INT_LEAST32_MIN;
1416 il32 = INT_LEAST32_MAX;
1417 typedef int_least64_t my_int_least64_t;
1418 my_int_least64_t il64 = INT_LEAST64_MIN;
1419 il64 = INT_LEAST64_MAX;
1420 typedef intmax_t my_intmax_t;
1421 my_intmax_t im = INTMAX_MAX;
1423 typedef intptr_t my_intptr_t;
1424 my_intptr_t ip = INTPTR_MAX;
1426 typedef uint8_t my_uint8_t;
1427 my_uint8_t ui8 = UINT8_MAX;
1429 typedef uint16_t my_uint16_t;
1430 my_uint16_t ui16 = UINT16_MAX;
1432 typedef uint32_t my_uint32_t;
1433 my_uint32_t ui32 = UINT32_MAX;
1435 typedef uint64_t my_uint64_t;
1436 my_uint64_t ui64 = UINT64_MAX;
1438 typedef uint_fast8_t my_uint_fast8_t;
1439 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1440 uif8 = UINT_FAST8_MAX;
1441 typedef uint_fast16_t my_uint_fast16_t;
1442 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1443 uif16 = UINT_FAST16_MAX;
1444 typedef uint_fast32_t my_uint_fast32_t;
1445 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1446 uif32 = UINT_FAST32_MAX;
1447 typedef uint_fast64_t my_uint_fast64_t;
1448 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1449 uif64 = UINT_FAST64_MAX;
1450 typedef uint_least8_t my_uint_least8_t;
1451 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1452 uil8 = UINT_LEAST8_MAX;
1453 typedef uint_least16_t my_uint_least16_t;
1454 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1455 uil16 = UINT_LEAST16_MAX;
1456 typedef uint_least32_t my_uint_least32_t;
1457 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1458 uil32 = UINT_LEAST32_MAX;
1459 typedef uint_least64_t my_uint_least64_t;
1460 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1461 uil64 = UINT_LEAST64_MAX;
1462 typedef uintmax_t my_uintmax_t;
1463 my_uintmax_t uim = UINTMAX_MAX;
1465 typedef uintptr_t my_uintptr_t;
1466 my_uintptr_t uip = UINTPTR_MAX;
1468 ],[glibcxx_cv_c99_stdint_tr1=yes],
1469 [glibcxx_cv_c99_stdint_tr1=no])
1471 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1472 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1473 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1474 [Define if C99 types in <stdint.h> should be imported in
1475 <tr1/cstdint> in namespace std::tr1.])
1478 # Check for the existence of <math.h> functions.
1479 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1480 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1481 AC_TRY_COMPILE([#include <math.h>],
1482 [typedef double_t my_double_t;
1483 typedef float_t my_float_t;
1497 copysignf(0.0f, 0.0f);
1498 copysignl(0.0l, 0.0l);
1515 fmaf(0.0f, 0.0f, 0.0f);
1516 fmal(0.0l, 0.0l, 0.0l);
1559 nextafter(0.0, 0.0);
1560 nextafterf(0.0f, 0.0f);
1561 nextafterl(0.0l, 0.0l);
1562 nexttoward(0.0, 0.0);
1563 nexttowardf(0.0f, 0.0f);
1564 nexttowardl(0.0l, 0.0l);
1565 remainder(0.0, 0.0);
1566 remainderf(0.0f, 0.0f);
1567 remainderl(0.0l, 0.0l);
1568 remquo(0.0, 0.0, 0);
1569 remquof(0.0f, 0.0f, 0);
1570 remquol(0.0l, 0.0l, 0);
1589 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1591 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1592 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1593 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1594 [Define if C99 functions or macros in <math.h> should be imported
1595 in <tr1/cmath> in namespace std::tr1.])
1598 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1599 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1600 ac_c99_inttypes_tr1=no;
1601 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1602 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1603 AC_TRY_COMPILE([#include <inttypes.h>],
1604 [intmax_t i, numer, denom, base;
1607 intmax_t ret = imaxabs(i);
1608 imaxdiv_t dret = imaxdiv(numer, denom);
1609 ret = strtoimax(s, endptr, base);
1610 uintmax_t uret = strtoumax(s, endptr, base);
1611 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1613 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1614 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1615 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1616 [Define if C99 functions in <inttypes.h> should be imported in
1617 <tr1/cinttypes> in namespace std::tr1.])
1620 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't
1621 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1622 ac_c99_inttypes_wchar_t_tr1=no;
1623 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1624 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1625 AC_TRY_COMPILE([#include <inttypes.h>],
1629 intmax_t ret = wcstoimax(s, endptr, base);
1630 uintmax_t uret = wcstoumax(s, endptr, base);
1631 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1632 [ac_c99_inttypes_wchar_t_tr1=no])
1634 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1635 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1636 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1637 [Define if wchar_t C99 functions in <inttypes.h> should be
1638 imported in <tr1/cinttypes> in namespace std::tr1.])
1641 # Check for the existence of the <stdbool.h> header.
1642 AC_CHECK_HEADERS(stdbool.h)
1644 CXXFLAGS="$ac_save_CXXFLAGS"
1649 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1650 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1652 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1654 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1655 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1656 if test -r /dev/random && test -r /dev/urandom; then
1657 glibcxx_cv_random_tr1=yes;
1659 glibcxx_cv_random_tr1=no;
1662 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1664 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1665 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1666 [Define if /dev/random and /dev/urandom are available for
1667 the random_device of TR1 (Chapter 5.1).])
1673 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
1675 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
1677 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
1678 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
1679 [#include <stdio.h>],
1680 [AC_MSG_ERROR([computing EOF failed])])
1682 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
1683 [Define to the value of the EOF integer constant.])
1685 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
1686 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
1687 [#include <stdio.h>],
1688 [AC_MSG_ERROR([computing SEEK_CUR failed])])
1690 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
1691 [Define to the value of the SEEK_CUR integer constant.])
1693 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
1694 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
1695 [#include <stdio.h>],
1696 [AC_MSG_ERROR([computing SEEK_END failed])])
1698 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
1699 [Define to the value of the SEEK_END integer constant.])
1703 dnl Check whether required C++ overloads are present in <math.h>.
1706 AC_DEFUN([GLIBCXX_CHECK_MATH_PROTO], [
1713 # Solaris 8 FCS only had an overload for double std::abs(double) in
1714 # <iso/math_iso.h>. Patches 111721-04 (SPARC) and 112757-01 (x86)
1715 # introduced the full set also found from Solaris 9 onwards.
1716 AC_MSG_CHECKING([for float std::abs(float) overload])
1717 AC_CACHE_VAL(glibcxx_cv_abs_float, [
1718 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1721 inline float abs(float __x)
1722 { return __builtin_fabsf(__x); }
1725 [glibcxx_cv_abs_float=no],
1726 [glibcxx_cv_abs_float=yes]
1729 # autoheader cannot handle indented templates.
1730 AH_VERBATIM([__CORRECT_ISO_CPP_MATH_H_PROTO1],
1731 [/* Define if all C++ overloads are available in <math.h>. */
1732 #if __cplusplus >= 199711L
1733 #undef __CORRECT_ISO_CPP_MATH_H_PROTO1
1735 AH_VERBATIM([__CORRECT_ISO_CPP_MATH_H_PROTO2],
1736 [/* Define if only double std::abs(double) is available in <math.h>. */
1737 #if __cplusplus >= 199711L
1738 #undef __CORRECT_ISO_CPP_MATH_H_PROTO2
1741 if test $glibcxx_cv_abs_float = yes; then
1742 AC_DEFINE(__CORRECT_ISO_CPP_MATH_H_PROTO1)
1744 AC_DEFINE(__CORRECT_ISO_CPP_MATH_H_PROTO2)
1746 AC_MSG_RESULT($glibcxx_cv_abs_float)
1754 dnl Check whether required C++ overloads are present in <stdlib.h>.
1757 AC_DEFUN([GLIBCXX_CHECK_STDLIB_PROTO], [
1764 # Solaris 8 FCS lacked the overloads for long std::abs(long) and
1765 # ldiv_t std::div(long, long) in <iso/stdlib_iso.h>. Patches 109607-02
1766 # (SPARC) and 109608-02 (x86) introduced them.
1767 AC_MSG_CHECKING([for long std::abs(long) overload])
1768 AC_CACHE_VAL(glibcxx_cv_abs_long, [
1769 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1770 [#include <stdlib.h>
1773 abs(long __i) { return labs(__i); }
1776 [glibcxx_cv_abs_long=no],
1777 [glibcxx_cv_abs_long=yes]
1780 # autoheader cannot handle indented templates.
1781 AH_VERBATIM([__CORRECT_ISO_CPP_STDLIB_H_PROTO],
1782 [/* Define if all C++ overloads are available in <stdlib.h>. */
1783 #if __cplusplus >= 199711L
1784 #undef __CORRECT_ISO_CPP_STDLIB_H_PROTO
1786 if test $glibcxx_cv_abs_long = yes; then
1787 AC_DEFINE(__CORRECT_ISO_CPP_STDLIB_H_PROTO, 1)
1789 AC_MSG_RESULT($glibcxx_cv_abs_long)
1797 dnl Check whether macros, etc are present for <system_error>
1799 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1801 m4_pushdef([n_syserr], [1])dnl
1802 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1803 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1804 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
1805 ECHILD, ENOSPC, EPERM,
1806 ETIMEDOUT, EWOULDBLOCK],
1807 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1808 AC_MSG_CHECKING([for syserr])
1809 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1810 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1811 [int i = syserr;])],
1812 [glibcxx_cv_system_error[]n_syserr=yes],
1813 [glibcxx_cv_system_error[]n_syserr=no])
1815 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1816 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1817 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1819 m4_define([n_syserr], m4_incr(n_syserr))dnl
1820 m4_popdef([SYSERR])dnl
1822 m4_popdef([n_syserr])dnl
1826 dnl Check for what type of C headers to use.
1828 dnl --enable-cheaders= [does stuff].
1829 dnl --disable-cheaders [does not do anything, really].
1830 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1831 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1833 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1834 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
1835 [construct "C" headers for g++], [permit c|c_std|c_global])
1836 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1838 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1840 # Allow overrides to configure.host here.
1841 if test $enable_cheaders = c_global; then
1845 AC_SUBST(C_INCLUDE_DIR)
1846 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1847 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1848 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1849 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1854 dnl Check for which locale library to use. The choice is mapped to
1855 dnl a subdirectory of config/locale.
1857 dnl Default is generic.
1859 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1860 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
1861 [use MODEL for target locale package],
1862 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
1864 # Deal with gettext issues. Default to not using it (=no) until we detect
1865 # support for it later. Let the user turn it off via --e/d, but let that
1866 # default to on for easier handling.
1869 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1873 # Either a known package, or "auto"
1874 if test $enable_clocale = no || test $enable_clocale = yes; then
1877 enable_clocale_flag=$enable_clocale
1879 # Probe for locale model to use if none specified.
1880 # Default to "generic".
1881 if test $enable_clocale_flag = auto; then
1882 case ${target_os} in
1883 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1884 enable_clocale_flag=gnu
1887 enable_clocale_flag=darwin
1890 if test x"$with_newlib" = x"yes"; then
1891 enable_clocale_flag=newlib
1893 enable_clocale_flag=generic
1899 # Sanity check model, and test for special functionality.
1900 if test $enable_clocale_flag = gnu; then
1901 AC_EGREP_CPP([_GLIBCXX_ok], [
1902 #include <features.h>
1903 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
1906 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1908 # Set it to scream when it hurts.
1909 ac_save_CFLAGS="$CFLAGS"
1910 CFLAGS="-Wimplicit-function-declaration -Werror"
1912 # Use strxfrm_l if available.
1913 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1915 #include <locale.h>],
1916 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1917 AC_DEFINE(HAVE_STRXFRM_L, 1,
1918 [Define if strxfrm_l is available in <string.h>.]),)
1920 # Use strerror_l if available.
1921 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1923 #include <locale.h>],
1924 [__locale_t loc; strerror_l(5, loc);],
1925 AC_DEFINE(HAVE_STRERROR_L, 1,
1926 [Define if strerror_l is available in <string.h>.]),)
1928 CFLAGS="$ac_save_CFLAGS"
1931 # Perhaps use strerror_r if available, and strerror_l isn't.
1932 ac_save_CFLAGS="$CFLAGS"
1933 CFLAGS="-Wimplicit-function-declaration -Werror"
1934 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1936 #include <locale.h>],
1937 [char s[128]; strerror_r(5, s, 128);],
1938 AC_DEFINE(HAVE_STRERROR_R, 1,
1939 [Define if strerror_r is available in <string.h>.]),)
1940 CFLAGS="$ac_save_CFLAGS"
1942 # Set configure bits for specified locale package
1943 AC_MSG_CHECKING([for C locale to use])
1944 case ${enable_clocale_flag} in
1946 AC_MSG_RESULT(generic)
1948 CLOCALE_H=config/locale/generic/c_locale.h
1949 CLOCALE_CC=config/locale/generic/c_locale.cc
1950 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1951 CCOLLATE_CC=config/locale/generic/collate_members.cc
1952 CCTYPE_CC=config/locale/generic/ctype_members.cc
1953 CMESSAGES_H=config/locale/generic/messages_members.h
1954 CMESSAGES_CC=config/locale/generic/messages_members.cc
1955 CMONEY_CC=config/locale/generic/monetary_members.cc
1956 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1957 CTIME_H=config/locale/generic/time_members.h
1958 CTIME_CC=config/locale/generic/time_members.cc
1959 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1962 AC_MSG_RESULT(darwin or freebsd)
1964 CLOCALE_H=config/locale/generic/c_locale.h
1965 CLOCALE_CC=config/locale/generic/c_locale.cc
1966 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1967 CCOLLATE_CC=config/locale/generic/collate_members.cc
1968 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1969 CMESSAGES_H=config/locale/generic/messages_members.h
1970 CMESSAGES_CC=config/locale/generic/messages_members.cc
1971 CMONEY_CC=config/locale/generic/monetary_members.cc
1972 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1973 CTIME_H=config/locale/generic/time_members.h
1974 CTIME_CC=config/locale/generic/time_members.cc
1975 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1981 # Declare intention to use gettext, and add support for specific
1983 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1986 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1987 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1988 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1991 # Export the build objects.
1992 for ling in $ALL_LINGUAS; do \
1993 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1994 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1996 AC_SUBST(glibcxx_MOFILES)
1997 AC_SUBST(glibcxx_POFILES)
1999 CLOCALE_H=config/locale/gnu/c_locale.h
2000 CLOCALE_CC=config/locale/gnu/c_locale.cc
2001 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2002 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2003 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2004 CMESSAGES_H=config/locale/gnu/messages_members.h
2005 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2006 CMONEY_CC=config/locale/gnu/monetary_members.cc
2007 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2008 CTIME_H=config/locale/gnu/time_members.h
2009 CTIME_CC=config/locale/gnu/time_members.cc
2010 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2013 AC_MSG_RESULT(IEEE 1003.1)
2015 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2016 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2017 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2018 CCOLLATE_CC=config/locale/generic/collate_members.cc
2019 CCTYPE_CC=config/locale/generic/ctype_members.cc
2020 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2021 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2022 CMONEY_CC=config/locale/generic/monetary_members.cc
2023 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2024 CTIME_H=config/locale/generic/time_members.h
2025 CTIME_CC=config/locale/generic/time_members.cc
2026 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2029 AC_MSG_RESULT(newlib)
2031 CLOCALE_H=config/locale/generic/c_locale.h
2032 CLOCALE_CC=config/locale/generic/c_locale.cc
2033 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2034 CCOLLATE_CC=config/locale/generic/collate_members.cc
2035 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2036 CMESSAGES_H=config/locale/generic/messages_members.h
2037 CMESSAGES_CC=config/locale/generic/messages_members.cc
2038 CMONEY_CC=config/locale/generic/monetary_members.cc
2039 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2040 CTIME_H=config/locale/generic/time_members.h
2041 CTIME_CC=config/locale/generic/time_members.cc
2042 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2046 # This is where the testsuite looks for locale catalogs, using the
2047 # -DLOCALEDIR define during testsuite compilation.
2048 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2049 AC_SUBST(glibcxx_localedir)
2051 # A standalone libintl (e.g., GNU libintl) may be in use.
2052 if test $USE_NLS = yes; then
2053 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2054 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2056 if test $USE_NLS = yes; then
2057 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2058 [Define if NLS translations are to be used.])
2063 AC_SUBST(CMESSAGES_H)
2064 AC_SUBST(CCODECVT_CC)
2065 AC_SUBST(CCOLLATE_CC)
2067 AC_SUBST(CMESSAGES_CC)
2069 AC_SUBST(CNUMERIC_CC)
2072 AC_SUBST(CLOCALE_CC)
2073 AC_SUBST(CLOCALE_INTERNAL_H)
2078 dnl Check for which std::allocator base class to use. The choice is
2079 dnl mapped from a subdirectory of include/ext.
2083 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2084 AC_MSG_CHECKING([for std::allocator base class])
2085 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2086 [use KIND for target std::allocator base],
2087 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2089 # If they didn't use this option switch, or if they specified --enable
2090 # with no specific model, we'll have to look for one. If they
2091 # specified --disable (???), do likewise.
2092 if test $enable_libstdcxx_allocator = no ||
2093 test $enable_libstdcxx_allocator = yes;
2095 enable_libstdcxx_allocator=auto
2098 # Either a known package, or "auto". Auto implies the default choice
2099 # for a particular platform.
2100 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2102 # Probe for host-specific support if no specific model is specified.
2104 if test $enable_libstdcxx_allocator_flag = auto; then
2105 case ${target_os} in
2106 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2107 enable_libstdcxx_allocator_flag=new
2110 enable_libstdcxx_allocator_flag=new
2114 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2117 # Set configure bits for specified locale package
2118 case ${enable_libstdcxx_allocator_flag} in
2120 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2121 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2124 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2125 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2128 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2129 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2132 ALLOCATOR_H=config/allocator/new_allocator_base.h
2133 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2136 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2137 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2141 AC_SUBST(ALLOCATOR_H)
2142 AC_SUBST(ALLOCATOR_NAME)
2147 dnl Check for whether the Boost-derived checks should be turned on.
2149 dnl --enable-concept-checks turns them on.
2150 dnl --disable-concept-checks leaves them off.
2151 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2152 dnl Where DEFAULT is either `yes' or `no'.
2154 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2155 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2156 if test $enable_concept_checks = yes; then
2157 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2158 [Define to use concept checking code from the boost libraries.])
2163 dnl Use extern templates.
2165 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2166 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2168 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2169 dnl Where DEFAULT is `yes' or `no'.
2171 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2173 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2175 AC_MSG_CHECKING([for extern template support])
2176 AC_MSG_RESULT([$enable_extern_template])
2178 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2182 dnl Check for parallel mode pre-requisites, including OpenMP support.
2184 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2186 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2190 # See if configured libgomp/omp.h exists. (libgomp may be in
2191 # noconfigdirs but not explicitly disabled.)
2192 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2193 enable_parallel=yes;
2195 AC_MSG_NOTICE([target-libgomp not built])
2198 AC_MSG_CHECKING([for parallel mode support])
2199 AC_MSG_RESULT([$enable_parallel])
2200 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
2205 dnl Check for which I/O library to use: stdio, or something specific.
2207 dnl Default is stdio.
2209 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2210 AC_MSG_CHECKING([for underlying I/O to use])
2211 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2212 [use target-specific I/O package], [permit stdio])
2214 # Now that libio has been removed, you can have any color you want as long
2215 # as it's black. This is one big no-op until other packages are added, but
2216 # showing the framework never hurts.
2217 case ${enable_cstdio} in
2219 CSTDIO_H=config/io/c_io_stdio.h
2220 BASIC_FILE_H=config/io/basic_file_stdio.h
2221 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2222 AC_MSG_RESULT(stdio)
2227 AC_SUBST(BASIC_FILE_H)
2228 AC_SUBST(BASIC_FILE_CC)
2233 dnl Check for "unusual" flags to pass to the compiler while building.
2235 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2236 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2237 dnl --disable-cxx-flags passes nothing.
2238 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2239 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2240 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2241 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2242 dnl If "default flags" is an empty string, the effect is the same
2243 dnl as --disable or --enable=no.
2245 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2246 AC_MSG_CHECKING([for extra compiler flags for building])
2247 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2248 [pass compiler FLAGS when building library],
2249 [case "x$enable_cxx_flags" in
2250 xno | x) enable_cxx_flags= ;;
2252 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2255 # Run through flags (either default or command-line) and set anything
2256 # extra (e.g., #defines) that must accompany particular g++ options.
2257 if test -n "$enable_cxx_flags"; then
2258 for f in $enable_cxx_flags; do
2262 *) # and we're trying to pass /what/ exactly?
2263 AC_MSG_ERROR([compiler flags start with a -]) ;;
2268 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2269 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2270 AC_SUBST(EXTRA_CXX_FLAGS)
2275 dnl Check to see if debugging libraries are to be built.
2277 dnl --enable-libstdcxx-debug
2278 dnl builds a separate set of debugging libraries in addition to the
2279 dnl normal (shared, static) libstdc++ binaries.
2281 dnl --disable-libstdcxx-debug
2282 dnl builds only one (non-debug) version of libstdc++.
2284 dnl --enable-libstdcxx-debug-flags=FLAGS
2285 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2287 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2288 dnl Where DEFAULT is either `yes' or `no'.
2290 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2291 AC_MSG_CHECKING([for additional debug build])
2292 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2293 AC_MSG_RESULT($enable_libstdcxx_debug)
2294 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2299 dnl Check for explicit debug flags.
2301 dnl --enable-libstdcxx-debug-flags='-O1'
2302 dnl is a general method for passing flags to be used when
2303 dnl building debug libraries with --enable-debug.
2305 dnl --disable-libstdcxx-debug-flags does nothing.
2306 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2307 dnl If "default flags" is an empty string, the effect is the same
2308 dnl as --disable or --enable=no.
2310 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2311 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2312 [pass compiler FLAGS when building debug library],
2313 [case "x$enable_libstdcxx_debug_flags" in
2314 xno | x) enable_libstdcxx_debug_flags= ;;
2316 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2319 # Option parsed, now set things appropriately
2320 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2321 AC_SUBST(DEBUG_FLAGS)
2323 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2328 dnl Check if the user only wants a freestanding library implementation.
2330 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2331 dnl installing only the headers required by [17.4.1.3] and the language
2332 dnl support library. More than that will be built (to keep the Makefiles
2333 dnl conveniently clean), but not installed.
2336 dnl is_hosted (yes/no)
2339 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2341 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2342 AC_ARG_ENABLE([hosted-libstdcxx],
2343 AC_HELP_STRING([--disable-hosted-libstdcxx],
2344 [only build freestanding C++ runtime support]),,
2347 enable_hosted_libstdcxx=no
2350 enable_hosted_libstdcxx=yes
2353 if test "$enable_hosted_libstdcxx" = no; then
2354 AC_MSG_NOTICE([Only freestanding libraries will be built])
2358 enable_libstdcxx_pch=no
2363 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2364 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2365 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2370 dnl Check for template specializations for the 'long long' type.
2371 dnl The result determines only whether 'long long' I/O is enabled; things
2372 dnl like numeric_limits<> specializations are always available.
2374 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2375 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2376 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2377 dnl Where DEFAULT is either `yes' or `no'.
2379 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2380 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2381 if test $enable_long_long = yes; then
2382 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2383 [Define if code specialized for long long should be used.])
2385 AC_MSG_CHECKING([for enabled long long specializations])
2386 AC_MSG_RESULT([$enable_long_long])
2391 dnl Check for decimal floating point.
2393 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2395 dnl This checks to see if the host supports decimal floating point types.
2398 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2400 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2402 # Fake what AC_TRY_COMPILE does, without linking as this is
2403 # unnecessary for this test.
2405 cat > conftest.$ac_ext << EOF
2406 [#]line __oline__ "configure"
2416 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2417 if AC_TRY_EVAL(ac_compile); then
2418 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2419 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2424 AC_MSG_RESULT($enable_dfp)
2429 dnl Check for GNU 128-bit integer and floating point types.
2431 dnl Note: also checks that the types aren't standard types.
2434 dnl _GLIBCXX_USE_INT128
2435 dnl _GLIBCXX_USE_FLOAT128
2437 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2442 # Fake what AC_TRY_COMPILE does, without linking as this is
2443 # unnecessary for this test.
2445 cat > conftest.$ac_ext << EOF
2446 [#]line __oline__ "configure"
2447 template<typename T1, typename T2>
2449 { typedef T2 type; };
2451 template<typename T>
2456 typename same<long, __int128>::type i1;
2457 typename same<long long, __int128>::type i2;
2461 AC_MSG_CHECKING([for __int128])
2462 if AC_TRY_EVAL(ac_compile); then
2463 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2464 [Define if __int128 is supported on this host.])
2469 AC_MSG_RESULT($enable_int128)
2472 cat > conftest.$ac_ext << EOF
2473 [#]line __oline__ "configure"
2474 template<typename T1, typename T2>
2476 { typedef T2 type; };
2478 template<typename T>
2483 typename same<double, __float128>::type f1;
2484 typename same<long double, __float128>::type f2;
2488 AC_MSG_CHECKING([for __float128])
2489 if AC_TRY_EVAL(ac_compile); then
2490 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
2491 [Define if __float128 is supported on this host.])
2496 AC_MSG_RESULT($enable_float128)
2503 dnl Check for template specializations for the 'wchar_t' type.
2505 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2506 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2507 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2508 dnl Where DEFAULT is either `yes' or `no'.
2510 dnl Necessary support must also be present.
2512 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2513 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2515 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2516 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2517 AC_MSG_CHECKING([for mbstate_t])
2518 AC_TRY_COMPILE([#include <wchar.h>],
2519 [mbstate_t teststate;],
2520 have_mbstate_t=yes, have_mbstate_t=no)
2521 AC_MSG_RESULT($have_mbstate_t)
2522 if test x"$have_mbstate_t" = xyes; then
2523 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2526 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2528 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2530 if test x"$enable_wchar_t" = x"yes"; then
2535 if test x"$ac_has_wchar_h" = xyes &&
2536 test x"$ac_has_wctype_h" = xyes; then
2537 AC_TRY_COMPILE([#include <wchar.h>
2598 ],[],[], [enable_wchar_t=no])
2606 if test x"$enable_wchar_t" = x"yes"; then
2607 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2608 [Define if code specialized for wchar_t should be used.])
2611 AC_MSG_CHECKING([for enabled wchar_t specializations])
2612 AC_MSG_RESULT([$enable_wchar_t])
2617 dnl Check to see if building and using a C++ precompiled header can be done.
2619 dnl --enable-libstdcxx-pch=yes
2620 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2621 dnl may work, after some light-hearted attempts to puzzle out compiler
2622 dnl support, flip bits on in include/Makefile.am
2624 dnl --disable-libstdcxx-pch
2625 dnl turns off attempts to use or build stdc++.h.gch.
2628 dnl glibcxx_PCHFLAGS
2630 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2631 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2632 if test $enable_libstdcxx_pch = yes; then
2633 AC_CACHE_CHECK([for compiler with PCH support],
2634 [glibcxx_cv_prog_CXX_pch],
2635 [ac_save_CXXFLAGS="$CXXFLAGS"
2636 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2639 echo '#include <math.h>' > conftest.h
2640 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2641 -o conftest.h.gch 1>&5 2>&1 &&
2642 echo '#error "pch failed"' > conftest.h &&
2643 echo '#include "conftest.h"' > conftest.cc &&
2644 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2646 glibcxx_cv_prog_CXX_pch=yes
2648 glibcxx_cv_prog_CXX_pch=no
2651 CXXFLAGS=$ac_save_CXXFLAGS
2654 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2657 AC_MSG_CHECKING([for enabled PCH])
2658 AC_MSG_RESULT([$enable_libstdcxx_pch])
2660 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2661 if test $enable_libstdcxx_pch = yes; then
2662 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2666 AC_SUBST(glibcxx_PCHFLAGS)
2671 dnl Check for atomic builtins.
2673 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2675 dnl This checks to see if the host supports the compiler-generated
2676 dnl builtins for atomic operations for various integral sizes. Note, this
2677 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2678 dnl that are used should be checked.
2681 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
2684 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2685 dnl _GLIBCXX_ATOMIC_BUILTINS_2
2686 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2687 dnl _GLIBCXX_ATOMIC_BUILTINS_8
2689 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2692 old_CXXFLAGS="$CXXFLAGS"
2694 # Do link tests if possible, instead asm tests, limited to some platforms
2695 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
2696 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
2697 atomic_builtins_link_tests=no
2698 if test x$gcc_no_link != xyes; then
2699 # Can do link tests. Limit to some tested platforms
2701 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
2702 atomic_builtins_link_tests=yes
2707 if test x$atomic_builtins_link_tests = xyes; then
2711 CXXFLAGS="$CXXFLAGS -fno-exceptions"
2713 AC_MSG_CHECKING([for atomic builtins for bool])
2714 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
2717 [typedef bool atomic_type;
2720 const atomic_type c3(0);
2721 __sync_fetch_and_add(&c1, c2);
2722 __sync_val_compare_and_swap(&c1, c3, c2);
2723 __sync_lock_test_and_set(&c1, c3);
2724 __sync_lock_release(&c1);
2725 __sync_synchronize();],
2726 [glibcxx_cv_atomic_bool=yes],
2727 [glibcxx_cv_atomic_bool=no])
2729 if test $glibcxx_cv_atomic_bool = yes; then
2730 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2731 [Define if builtin atomic operations for bool are supported on this host.])
2733 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2735 AC_MSG_CHECKING([for atomic builtins for short])
2736 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
2739 [typedef short atomic_type;
2742 const atomic_type c3(0);
2743 __sync_fetch_and_add(&c1, c2);
2744 __sync_val_compare_and_swap(&c1, c3, c2);
2745 __sync_lock_test_and_set(&c1, c3);
2746 __sync_lock_release(&c1);
2747 __sync_synchronize();],
2748 [glibcxx_cv_atomic_short=yes],
2749 [glibcxx_cv_atomic_short=no])
2751 if test $glibcxx_cv_atomic_short = yes; then
2752 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
2753 [Define if builtin atomic operations for short are supported on this host.])
2755 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2757 AC_MSG_CHECKING([for atomic builtins for int])
2758 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
2761 [typedef int atomic_type;
2764 const atomic_type c3(0);
2765 __sync_fetch_and_add(&c1, c2);
2766 __sync_val_compare_and_swap(&c1, c3, c2);
2767 __sync_lock_test_and_set(&c1, c3);
2768 __sync_lock_release(&c1);
2769 __sync_synchronize();],
2770 [glibcxx_cv_atomic_int=yes],
2771 [glibcxx_cv_atomic_int=no])
2773 if test $glibcxx_cv_atomic_int = yes; then
2774 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2775 [Define if builtin atomic operations for int are supported on this host.])
2777 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2779 AC_MSG_CHECKING([for atomic builtins for long long])
2780 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
2783 [typedef long long atomic_type;
2786 const atomic_type c3(0);
2787 __sync_fetch_and_add(&c1, c2);
2788 __sync_val_compare_and_swap(&c1, c3, c2);
2789 __sync_lock_test_and_set(&c1, c3);
2790 __sync_lock_release(&c1);
2791 __sync_synchronize();],
2792 [glibcxx_cv_atomic_long_long=yes],
2793 [glibcxx_cv_atomic_long_long=no])
2795 if test $glibcxx_cv_atomic_long_long = yes; then
2796 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
2797 [Define if builtin atomic operations for long long are supported on this host.])
2799 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2805 # Compile unoptimized.
2808 # Fake what AC_TRY_COMPILE does.
2810 cat > conftest.$ac_ext << EOF
2811 [#]line __oline__ "configure"
2814 typedef bool atomic_type;
2817 const atomic_type c3(0);
2818 __sync_fetch_and_add(&c1, c2);
2819 __sync_val_compare_and_swap(&c1, c3, c2);
2820 __sync_lock_test_and_set(&c1, c3);
2821 __sync_lock_release(&c1);
2822 __sync_synchronize();
2827 AC_MSG_CHECKING([for atomic builtins for bool])
2828 if AC_TRY_EVAL(ac_compile); then
2829 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2830 glibcxx_cv_atomic_bool=no
2832 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2833 [Define if builtin atomic operations for bool are supported on this host.])
2834 glibcxx_cv_atomic_bool=yes
2837 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2840 cat > conftest.$ac_ext << EOF
2841 [#]line __oline__ "configure"
2844 typedef short atomic_type;
2847 const atomic_type c3(0);
2848 __sync_fetch_and_add(&c1, c2);
2849 __sync_val_compare_and_swap(&c1, c3, c2);
2850 __sync_lock_test_and_set(&c1, c3);
2851 __sync_lock_release(&c1);
2852 __sync_synchronize();
2857 AC_MSG_CHECKING([for atomic builtins for short])
2858 if AC_TRY_EVAL(ac_compile); then
2859 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2860 glibcxx_cv_atomic_short=no
2862 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
2863 [Define if builtin atomic operations for short are supported on this host.])
2864 glibcxx_cv_atomic_short=yes
2867 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2870 cat > conftest.$ac_ext << EOF
2871 [#]line __oline__ "configure"
2874 // NB: _Atomic_word not necessarily int.
2875 typedef int atomic_type;
2878 const atomic_type c3(0);
2879 __sync_fetch_and_add(&c1, c2);
2880 __sync_val_compare_and_swap(&c1, c3, c2);
2881 __sync_lock_test_and_set(&c1, c3);
2882 __sync_lock_release(&c1);
2883 __sync_synchronize();
2888 AC_MSG_CHECKING([for atomic builtins for int])
2889 if AC_TRY_EVAL(ac_compile); then
2890 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2891 glibcxx_cv_atomic_int=no
2893 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2894 [Define if builtin atomic operations for int are supported on this host.])
2895 glibcxx_cv_atomic_int=yes
2898 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2901 cat > conftest.$ac_ext << EOF
2902 [#]line __oline__ "configure"
2905 typedef long long atomic_type;
2908 const atomic_type c3(0);
2909 __sync_fetch_and_add(&c1, c2);
2910 __sync_val_compare_and_swap(&c1, c3, c2);
2911 __sync_lock_test_and_set(&c1, c3);
2912 __sync_lock_release(&c1);
2913 __sync_synchronize();
2918 AC_MSG_CHECKING([for atomic builtins for long long])
2919 if AC_TRY_EVAL(ac_compile); then
2920 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2921 glibcxx_cv_atomic_long_long=no
2923 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
2924 [Define if builtin atomic operations for long long are supported on this host.])
2925 glibcxx_cv_atomic_long_long=yes
2928 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2933 CXXFLAGS="$old_CXXFLAGS"
2936 # Set atomicity_dir to builtins if either of above tests pass.
2937 if test $glibcxx_cv_atomic_int = yes || test $glibcxx_cv_atomic_bool = yes ; then
2938 atomicity_dir=cpu/generic/atomicity_builtins
2941 # If still generic, set to mutex.
2942 if test $atomicity_dir = "cpu/generic" ; then
2943 atomicity_dir=cpu/generic/atomicity_mutex
2944 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2945 if test "x$target_thread_file" = xsingle; then
2946 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2947 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2949 AC_MSG_WARN([They will be faked using a mutex.])
2950 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2958 dnl Check for exception handling support. If an explicit enable/disable
2959 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2960 dnl target may or may not support call frame exceptions.
2962 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2963 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2964 dnl Neither one forces an attempt at detection.
2967 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2969 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2970 AC_MSG_CHECKING([for exception model to use])
2973 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2974 [force use of builtin_setjmp for exceptions],
2975 [permit yes|no|auto])
2977 if test $enable_sjlj_exceptions = auto; then
2978 # Botheration. Now we've got to detect the exception model. Link tests
2979 # against libgcc.a are problematic since we've not been given proper -L
2980 # bits for single-tree newlib and libgloss.
2982 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2983 cat > conftest.$ac_ext << EOF
2984 [#]line __oline__ "configure"
2993 old_CXXFLAGS="$CXXFLAGS"
2995 if AC_TRY_EVAL(ac_compile); then
2996 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2997 enable_sjlj_exceptions=yes
2998 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2999 enable_sjlj_exceptions=no
3000 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
3001 enable_sjlj_exceptions=no
3004 CXXFLAGS="$old_CXXFLAGS"
3008 # This is a tad weird, for hysterical raisins. We have to map
3009 # enable/disable to two different models.
3010 case $enable_sjlj_exceptions in
3012 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
3013 [Define if the compiler is configured for setjmp/longjmp exceptions.])
3014 ac_exception_model_name=sjlj
3017 ac_exception_model_name="call frame"
3020 AC_MSG_ERROR([unable to detect exception model])
3024 AC_MSG_RESULT($ac_exception_model_name)
3029 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3031 dnl --enable-visibility enables attempt to use visibility attributes.
3032 dnl --disable-visibility turns off all use of visibility attributes.
3033 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
3034 dnl Where DEFAULT is 'yes'.
3036 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
3037 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
3039 if test x$enable_visibility = xyes ; then
3040 dnl all hail libgfortran
3041 dnl Check whether the target supports hidden visibility.
3042 AC_CACHE_CHECK([whether the target supports hidden visibility],
3043 glibcxx_cv_have_attribute_visibility, [
3044 save_CFLAGS="$CFLAGS"
3045 CFLAGS="$CFLAGS -Werror"
3046 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3047 [], glibcxx_cv_have_attribute_visibility=yes,
3048 glibcxx_cv_have_attribute_visibility=no)
3049 CFLAGS="$save_CFLAGS"])
3050 if test $glibcxx_cv_have_attribute_visibility = no; then
3051 enable_visibility=no
3055 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
3056 AC_MSG_NOTICE([visibility supported: $enable_visibility])
3061 dnl Add version tags to symbols in shared library (or not), additionally
3062 dnl marking other symbols as private/local (or not).
3064 dnl Sets libtool_VERSION, and determines shared library SONAME.
3066 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3068 dnl --enable-symvers=style adds a version script to the linker call when
3069 dnl creating the shared library. The choice of version script is
3070 dnl controlled by 'style'.
3071 dnl --disable-symvers does not.
3073 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3074 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3075 dnl choose a default style based on linker characteristics. Passing
3076 dnl 'no' disables versioning.
3078 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3080 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3081 [enables symbol versioning of the shared library],
3082 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3084 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3085 # don't know enough about $LD to do tricks...
3086 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3087 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3088 # with extern "C++" in version scripts.
3089 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3091 # Turn a 'yes' into a suitable default.
3092 if test x$enable_symvers = xyes ; then
3093 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3096 if test $with_gnu_ld = yes ; then
3097 case ${target_os} in
3099 enable_symvers=no ;;
3101 enable_symvers=gnu ;;
3104 case ${target_os} in
3106 enable_symvers=darwin ;;
3107 # Sun symbol versioning exists since Solaris 2.5.
3108 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3109 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3110 # version scripts, so disable symbol versioning if none can be
3112 if test -z "$ac_cv_path_CXXFILT"; then
3113 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3114 AC_MSG_WARN([=== no GNU c++filt could be found.])
3115 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3122 enable_symvers=no ;;
3128 # Check to see if 'darwin' or 'darwin-export' can win.
3129 if test x$enable_symvers = xdarwin-export ; then
3130 enable_symvers=darwin
3133 # Check if 'sun' was requested on non-Solaris 2 platforms.
3134 if test x$enable_symvers = xsun ; then
3135 case ${target_os} in
3141 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3142 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3143 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3149 # Check to see if 'gnu' can win.
3150 if test $enable_symvers = gnu ||
3151 test $enable_symvers = gnu-versioned-namespace ||
3152 test $enable_symvers = sun; then
3153 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3154 AC_MSG_CHECKING([for shared libgcc])
3155 ac_save_CFLAGS="$CFLAGS"
3157 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3158 CFLAGS="$ac_save_CFLAGS"
3159 if test $glibcxx_shared_libgcc = no; then
3160 cat > conftest.c <<EOF
3161 int main (void) { return 0; }
3164 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3165 -shared -shared-libgcc -o conftest.so \
3166 conftest.c -v 2>&1 >/dev/null \
3167 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3169 rm -f conftest.c conftest.so
3170 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3171 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3172 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3173 CFLAGS="$ac_save_CFLAGS"
3176 AC_MSG_RESULT($glibcxx_shared_libgcc)
3178 # For GNU ld, we need at least this version. The format is described in
3179 # GLIBCXX_CHECK_LINKER_FEATURES above.
3180 glibcxx_min_gnu_ld_version=21400
3182 # If no shared libgcc, can't win.
3183 if test $glibcxx_shared_libgcc != yes; then
3184 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3185 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3186 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3188 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3189 : All interesting versions of Sun ld support sun style symbol versioning.
3190 elif test $with_gnu_ld != yes ; then
3192 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3193 AC_MSG_WARN([=== you are not using the GNU linker.])
3194 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3196 elif test $glibcxx_ld_is_gold = yes ; then
3197 : All versions of gold support symbol versioning.
3198 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3199 # The right tools, the right setup, but too old. Fallbacks?
3200 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3201 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3202 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3203 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3204 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3209 # For libtool versioning info, format is CURRENT:REVISION:AGE
3210 libtool_VERSION=6:17:0
3212 # Everything parsed; figure out what files and settings to use.
3213 case $enable_symvers in
3215 SYMVER_FILE=config/abi/pre/none.ver
3218 SYMVER_FILE=config/abi/pre/gnu.ver
3219 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3220 [Define to use GNU versioning in the shared library.])
3222 gnu-versioned-namespace)
3223 libtool_VERSION=7:0:0
3224 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3225 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3226 [Define to use GNU namespace versioning in the shared library.])
3229 SYMVER_FILE=config/abi/pre/gnu.ver
3230 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3231 [Define to use darwin versioning in the shared library.])
3234 SYMVER_FILE=config/abi/pre/gnu.ver
3235 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3236 [Define to use Sun versioning in the shared library.])
3240 if test x$enable_symvers != xno ; then
3241 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3242 [Define to use symbol versioning in the shared library.])
3245 AC_CACHE_CHECK([whether the target supports .symver directive],
3246 glibcxx_cv_have_as_symver_directive, [
3247 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3248 [], glibcxx_cv_have_as_symver_directive=yes,
3249 glibcxx_cv_have_as_symver_directive=no)])
3250 if test $glibcxx_cv_have_as_symver_directive = yes; then
3251 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3252 [Define to 1 if the target assembler supports .symver directive.])
3255 AC_SUBST(SYMVER_FILE)
3256 AC_SUBST(port_specific_symbol_files)
3257 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3258 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3259 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3260 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3261 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3262 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3264 if test $enable_symvers != no ; then
3265 case ${target_os} in
3266 # The Solaris 2 runtime linker doesn't support the GNU extension of
3267 # binding the same symbol to different versions
3269 symvers_renaming=no ;;
3270 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3272 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3273 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3274 symvers_renaming=yes ;;
3279 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SOL2, test $symvers_renaming = no)
3281 # Now, set up compatibility support, if any.
3282 # In addition, need this to deal with std::size_t mangling in
3283 # src/compatibility.cc. In a perfect world, could use
3284 # typeid(std::size_t).name()[0] to do direct substitution.
3285 AC_MSG_CHECKING([for size_t as unsigned int])
3286 ac_save_CFLAGS="$CFLAGS"
3288 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3289 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3290 CFLAGS=$ac_save_CFLAGS
3291 if test "$glibcxx_size_t_is_i" = yes; then
3292 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3294 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3296 AC_MSG_CHECKING([for ptrdiff_t as int])
3297 ac_save_CFLAGS="$CFLAGS"
3299 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3300 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3301 CFLAGS=$ac_save_CFLAGS
3302 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3303 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3305 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3310 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3311 dnl We must stage the required headers so that they will be installed
3312 dnl with the library (unlike libgcc, the STL implementation is provided
3313 dnl solely within headers). Since we must not inject random user-space
3314 dnl macro names into user-provided C++ code, we first stage into <file>-in
3315 dnl and process to <file> with an output command. The reason for a two-
3316 dnl stage process here is to correctly handle $srcdir!=$objdir without
3317 dnl having to write complex code (the sed commands to clean the macro
3318 dnl namespace are complex and fragile enough as it is). We must also
3319 dnl add a relative path so that -I- is supported properly.
3321 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3322 AC_MSG_CHECKING([for thread model used by GCC])
3323 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3324 AC_MSG_RESULT([$target_thread_file])
3329 dnl Check if gthread implementation defines the types and functions
3330 dnl required by the c++0x thread library. Conforming gthread
3331 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3333 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3337 ac_save_CXXFLAGS="$CXXFLAGS"
3338 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3339 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3341 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3342 case $target_thread_file in
3344 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3347 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3349 AC_TRY_COMPILE([#include <unistd.h>],
3351 // In case of POSIX threads check _POSIX_TIMEOUTS.
3352 #if (defined(_PTHREADS) \
3353 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3356 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3358 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3359 [Define to 1 if mutex_timedlock is available.])
3361 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3362 else res_mutex_timedlock=no ; fi
3363 AC_MSG_RESULT([$res_mutex_timedlock])
3365 AC_MSG_CHECKING([for gthreads library])
3367 AC_TRY_COMPILE([#include "gthr.h"],
3369 #ifndef __GTHREADS_CXX0X
3372 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3374 AC_MSG_RESULT([$ac_has_gthreads])
3376 if test x"$ac_has_gthreads" = x"yes"; then
3377 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3378 [Define if gthreads library is available.])
3381 CXXFLAGS="$ac_save_CXXFLAGS"
3386 # Check whether LC_MESSAGES is available in <locale.h>.
3387 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3389 # This file file be copied and used freely without restrictions. It can
3390 # be used in projects which are not available under the GNU Public License
3391 # but which still want to provide support for the GNU gettext functionality.
3392 # Please note that the actual code is *not* freely available.
3393 AC_DEFUN([AC_LC_MESSAGES], [
3394 AC_CHECK_HEADER(locale.h, [
3395 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3396 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3397 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3398 if test $ac_cv_val_LC_MESSAGES = yes; then
3399 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3400 [Define if LC_MESSAGES is available in <locale.h>.])
3406 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3408 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3412 ac_save_CXXFLAGS="$CXXFLAGS"
3413 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3415 AC_MSG_CHECKING([for get_nprocs])
3416 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3417 GCC_TRY_COMPILE_OR_LINK(
3418 [#include <sys/sysinfo.h>],
3419 [int n = get_nprocs();],
3420 [glibcxx_cv_GET_NPROCS=yes],
3421 [glibcxx_cv_GET_NPROCS=no])
3423 if test $glibcxx_cv_GET_NPROCS = yes; then
3424 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3426 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3428 CXXFLAGS="$ac_save_CXXFLAGS"
3433 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3435 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3439 ac_save_CXXFLAGS="$CXXFLAGS"
3440 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3442 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3443 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3444 GCC_TRY_COMPILE_OR_LINK(
3445 [#include <unistd.h>],
3446 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3447 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3448 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3450 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3451 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3453 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3455 CXXFLAGS="$ac_save_CXXFLAGS"
3460 # Macros from the top-level gcc directory.
3461 m4_include([../config/gc++filt.m4])
3462 m4_include([../config/tls.m4])