3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
27 AC_MSG_NOTICE([OS config directory is $os_include_dir])
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src doc po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
63 toplevel_srcdir=${glibcxx_srcdir}/..
64 AC_SUBST(glibcxx_builddir)
65 AC_SUBST(glibcxx_srcdir)
66 AC_SUBST(toplevel_srcdir)
68 # We use these options to decide which functions to include. They are
69 # set from the top level.
70 AC_ARG_WITH([target-subdir],
71 AC_HELP_STRING([--with-target-subdir=SUBDIR],
72 [configuring in a subdirectory]))
74 AC_ARG_WITH([cross-host],
75 AC_HELP_STRING([--with-cross-host=HOST],
76 [configuring with a cross compiler]))
79 AC_HELP_STRING([--with-newlib],
80 [assume newlib as a system C library]))
82 # We're almost certainly being configured before anything else which uses
83 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
84 # we not cache the value of CXX that we "discover" here, because it's set
85 # to something unique for us and libjava. Other target libraries need to
86 # find CXX for themselves. We yank the rug out from under the normal AC_*
87 # process by sneakily renaming the cache variable. This also lets us debug
88 # the value of "our" CXX in postmortems.
90 # We must also force CXX to /not/ be a precious variable, otherwise the
91 # wrong (non-multilib-adjusted) value will be used in multilibs. This
92 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
93 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
94 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
96 # -fno-builtin must be present here so that a non-conflicting form of
97 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
99 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
100 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
101 m4_define([_AC_ARG_VAR_PRECIOUS],[])
102 save_CXXFLAGS="$CXXFLAGS"
103 CXXFLAGS="$CXXFLAGS -fno-builtin"
106 CXXFLAGS="$save_CXXFLAGS"
107 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
111 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
112 # available). Uncomment the next line to force a particular method.
116 AC_CHECK_TOOL(AS, as)
117 AC_CHECK_TOOL(AR, ar)
118 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
122 # Set up safe default values for all subsequent AM_CONDITIONAL tests
123 # which are themselves conditionally expanded.
124 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
125 ## other macros from doing the same. This should be automated.) -pme
128 # Check for uClibc since Linux platforms use different configuration
129 # directories depending on the C library in use.
130 AC_EGREP_CPP([_using_uclibc], [
135 ], uclibc=yes, uclibc=no)
137 # Find platform-specific directories containing configuration info.
138 # Also possibly modify flags used elsewhere, as needed by the platform.
144 dnl Tests for newer compiler features, or features that are present in newer
145 dnl compiler versions but not older compiler versions still in use, should
149 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
150 dnl new inlining code or the new system_header pragma will die on -Werror.
151 dnl Leave it out by default and use maint-mode to use it.
152 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
153 dnl compiler supports it and the user has not requested debug mode.
155 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
156 # All these tests are for C++; save the language and the compiler flags.
157 # The CXXFLAGS thing is suspicious, but based on similar bits previously
158 # found in GLIBCXX_CONFIGURE.
161 ac_test_CXXFLAGS="${CXXFLAGS+set}"
162 ac_save_CXXFLAGS="$CXXFLAGS"
164 # Check for maintainer-mode bits.
165 if test x"$USE_MAINTAINER_MODE" = xno; then
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$ac_test_CXXFLAGS" = set; then
176 CXXFLAGS="$ac_save_CXXFLAGS"
178 # this is the suspicious part
181 if test x"$ac_fdsections" = x"yes"; then
182 SECTION_FLAGS='-ffunction-sections -fdata-sections'
184 AC_MSG_RESULT($ac_fdsections)
188 AC_SUBST(SECTION_FLAGS)
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
203 dnl glibcxx_ld_is_gold (set to "no" or "yes")
204 dnl glibcxx_gnu_ld_version (possibly)
206 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
207 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
209 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
210 # If we're not using GNU ld, then there's no point in even trying these
211 # tests. Check for that first. We should have already tested for gld
212 # by now (in libtool), but require it now just to be safe...
213 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
214 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
215 AC_REQUIRE([AC_PROG_LD])
216 AC_REQUIRE([AC_PROG_AWK])
218 # The name set by libtool depends on the version of libtool. Shame on us
219 # for depending on an impl detail, but c'est la vie. Older versions used
220 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
221 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
222 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
223 # set (hence we're using an older libtool), then set it.
224 if test x${with_gnu_ld+set} != xset; then
225 if test x${ac_cv_prog_gnu_ld+set} != xset; then
226 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
229 with_gnu_ld=$ac_cv_prog_gnu_ld
233 # Start by getting the version number. I think the libtool test already
234 # does some of this, but throws away the result.
235 glibcxx_ld_is_gold=no
236 if test x"$with_gnu_ld" = x"yes"; then
237 AC_MSG_CHECKING([for ld version])
239 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
240 glibcxx_ld_is_gold=yes
242 ldver=`$LD --version 2>/dev/null | head -1 | \
243 sed -e 's/GNU \(go\)\{0,1\}ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\4/'`
245 glibcxx_gnu_ld_version=`echo $ldver | \
246 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
247 AC_MSG_RESULT($glibcxx_gnu_ld_version)
251 glibcxx_have_gc_sections=no
252 if test "$glibcxx_ld_is_gold" = "yes"; then
253 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
254 glibcxx_have_gc_sections=yes
257 glibcxx_gcsections_min_ld=21602
258 if test x"$with_gnu_ld" = x"yes" &&
259 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
260 glibcxx_have_gc_sections=yes
263 if test "$glibcxx_have_gc_sections" = "yes"; then
264 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
265 # NB: This flag only works reliably after 2.16.1. Configure tests
266 # for this are difficult, so hard wire a value that should work.
268 ac_test_CFLAGS="${CFLAGS+set}"
269 ac_save_CFLAGS="$CFLAGS"
270 CFLAGS='-Wl,--gc-sections'
272 # Check for -Wl,--gc-sections
273 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
274 AC_TRY_LINK([ int one(void) { return 1; }
275 int two(void) { return 2; }
276 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
277 if test "$ac_gcsections" = "yes"; then
280 if $CC -c conftest.c; then
281 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
282 grep "Warning: gc-sections option ignored" > /dev/null; then
286 rm -f conftest.c conftest.o conftest
288 if test "$ac_gcsections" = "yes"; then
289 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
291 AC_MSG_RESULT($ac_gcsections)
293 if test "$ac_test_CFLAGS" = set; then
294 CFLAGS="$ac_save_CFLAGS"
296 # this is the suspicious part
302 # Note this is only for shared objects.
304 if test x"$with_gnu_ld" = x"yes"; then
305 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
306 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
307 if test -n "$cxx_z_relo"; then
308 OPT_LDFLAGS="-Wl,-z,relro"
311 AC_MSG_RESULT($ac_ld_relro)
314 # Set linker optimization flags.
315 if test x"$with_gnu_ld" = x"yes"; then
316 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
319 AC_SUBST(SECTION_LDFLAGS)
320 AC_SUBST(OPT_LDFLAGS)
325 dnl Check for headers for, and arguments to, the setrlimit() function.
326 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
329 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
330 dnl various HAVE_LIMIT_* for individual limit names
332 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
333 AC_MSG_CHECKING([for RLIMIT_$1])
336 #include <sys/time.h>
337 #include <sys/resource.h>
339 [ int f = RLIMIT_$1 ; ],
340 [glibcxx_mresult=1], [glibcxx_mresult=0])
341 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
342 [Only used in build directory testsuite_hooks.h.])
343 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
347 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
348 setrlimit_have_headers=yes
349 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
351 [setrlimit_have_headers=no])
352 # If don't have the headers, then we can't run the tests now, and we
353 # won't be seeing any of these during testsuite compilation.
354 if test $setrlimit_have_headers = yes; then
355 # Can't do these in a loop, else the resulting syntax is wrong.
356 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
357 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
358 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
359 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
360 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
362 # Check for rlimit, setrlimit.
363 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
366 #include <sys/time.h>
367 #include <sys/resource.h>
371 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
375 AC_MSG_CHECKING([for testsuite resource limits support])
376 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
378 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
379 [Define if using setrlimit to set resource limits during
384 AC_MSG_RESULT($ac_res_limits)
389 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
390 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
392 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
396 ac_save_CXXFLAGS="$CXXFLAGS"
397 CXXFLAGS="$CXXFLAGS -fno-exceptions"
399 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
400 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
401 GCC_TRY_COMPILE_OR_LINK(
402 [#include <sys/stat.h>],
405 S_ISREG(buffer.st_mode);],
406 [glibcxx_cv_S_ISREG=yes],
407 [glibcxx_cv_S_ISREG=no])
409 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
410 GCC_TRY_COMPILE_OR_LINK(
411 [#include <sys/stat.h>],
414 S_IFREG & buffer.st_mode;],
415 [glibcxx_cv_S_IFREG=yes],
416 [glibcxx_cv_S_IFREG=no])
419 if test $glibcxx_cv_S_ISREG = yes; then
420 AC_DEFINE(HAVE_S_ISREG, 1,
421 [Define if S_IFREG is available in <sys/stat.h>.])
423 elif test $glibcxx_cv_S_IFREG = yes; then
424 AC_DEFINE(HAVE_S_IFREG, 1,
425 [Define if S_IFREG is available in <sys/stat.h>.])
430 CXXFLAGS="$ac_save_CXXFLAGS"
436 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
438 AC_DEFUN([GLIBCXX_CHECK_POLL], [
442 ac_save_CXXFLAGS="$CXXFLAGS"
443 CXXFLAGS="$CXXFLAGS -fno-exceptions"
445 AC_MSG_CHECKING([for poll])
446 AC_CACHE_VAL(glibcxx_cv_POLL, [
447 GCC_TRY_COMPILE_OR_LINK(
449 [struct pollfd pfd[1];
450 pfd[0].events = POLLIN;
452 [glibcxx_cv_POLL=yes],
453 [glibcxx_cv_POLL=no])
455 if test $glibcxx_cv_POLL = yes; then
456 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
458 AC_MSG_RESULT($glibcxx_cv_POLL)
460 CXXFLAGS="$ac_save_CXXFLAGS"
466 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
468 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
472 ac_save_CXXFLAGS="$CXXFLAGS"
473 CXXFLAGS="$CXXFLAGS -fno-exceptions"
475 AC_MSG_CHECKING([for writev])
476 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
477 GCC_TRY_COMPILE_OR_LINK(
478 [#include <sys/uio.h>],
479 [struct iovec iov[2];
481 [glibcxx_cv_WRITEV=yes],
482 [glibcxx_cv_WRITEV=no])
484 if test $glibcxx_cv_WRITEV = yes; then
485 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
487 AC_MSG_RESULT($glibcxx_cv_WRITEV)
489 CXXFLAGS="$ac_save_CXXFLAGS"
495 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
496 dnl Also check whether int64_t is actually a typedef to long or long long.
498 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
503 AC_MSG_CHECKING([for int64_t])
504 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
506 [#include <stdint.h>],
508 [glibcxx_cv_INT64_T=yes],
509 [glibcxx_cv_INT64_T=no])
512 if test $glibcxx_cv_INT64_T = yes; then
513 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
514 AC_MSG_RESULT($glibcxx_cv_INT64_T)
516 AC_MSG_CHECKING([for int64_t as long])
517 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
520 template<typename, typename> struct same { enum { value = -1 }; };
521 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
522 int array[same<int64_t, long>::value];], [],
523 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
526 if test $glibcxx_cv_int64_t_long = yes; then
527 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
528 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
531 AC_MSG_CHECKING([for int64_t as long long])
532 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
535 template<typename, typename> struct same { enum { value = -1 }; };
536 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
537 int array[same<int64_t, long long>::value];], [],
538 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
541 if test $glibcxx_cv_int64_t_long_long = yes; then
542 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
543 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
552 dnl Check whether LFS support is available.
554 AC_DEFUN([GLIBCXX_CHECK_LFS], [
557 ac_save_CXXFLAGS="$CXXFLAGS"
558 CXXFLAGS="$CXXFLAGS -fno-exceptions"
559 AC_MSG_CHECKING([for LFS support])
560 AC_CACHE_VAL(glibcxx_cv_LFS, [
561 GCC_TRY_COMPILE_OR_LINK(
564 #include <sys/stat.h>
568 fseeko64(fp, 0, SEEK_CUR);
570 lseek64(1, 0, SEEK_CUR);
573 [glibcxx_cv_LFS=yes],
576 if test $glibcxx_cv_LFS = yes; then
577 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
579 AC_MSG_RESULT($glibcxx_cv_LFS)
580 CXXFLAGS="$ac_save_CXXFLAGS"
586 dnl Check for whether a fully dynamic basic_string implementation should
587 dnl be turned on, that does not put empty objects in per-process static
588 dnl memory (mostly useful together with shared memory allocators, see PR
589 dnl libstdc++/16612 for details).
591 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
592 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
593 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
594 dnl Where DEFAULT is either `yes' or `no'.
596 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
597 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
598 if test $enable_fully_dynamic_string = yes; then
599 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
600 [Define if a fully dynamic basic_string is wanted.])
606 dnl Does any necessary configuration of the testsuite directory. Generates
607 dnl the testsuite_hooks.h header.
609 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
613 dnl GLIBCXX_TEST_WCHAR_T
614 dnl GLIBCXX_TEST_THREAD
618 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
619 if $GLIBCXX_IS_NATIVE ; then
620 # Do checks for resource limit functions.
621 GLIBCXX_CHECK_SETRLIMIT
623 # Look for setenv, so that extended locale tests can be performed.
624 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
627 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
628 test $enable_symvers != no; then
631 enable_abi_check=no ;;
633 enable_abi_check=yes ;;
636 # Only build this as native, since automake does not understand
641 # Export file names for ABI checking.
642 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
643 AC_SUBST(baseline_dir)
648 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
652 dnl TOPLEVEL_INCLUDES
654 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
655 # Used for every C++ compile we perform.
657 -I$glibcxx_builddir/include/$host_alias \
658 -I$glibcxx_builddir/include \
659 -I$glibcxx_srcdir/libsupc++"
661 # For Canadian crosses, pick this up too.
662 if test $CANADIAN = yes; then
663 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
666 # Stuff in the actual top level. Currently only used by libsupc++ to
667 # get unwind* headers from the gcc dir.
668 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
669 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
671 # Now, export this to all the little Makefiles....
672 AC_SUBST(GLIBCXX_INCLUDES)
673 AC_SUBST(TOPLEVEL_INCLUDES)
678 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
679 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
682 dnl OPTIMIZE_CXXFLAGS
685 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
686 # Optimization flags that are probably a good idea for thrill-seekers. Just
687 # uncomment the lines below and make, everything else is ready to go...
688 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
689 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
690 AC_SUBST(OPTIMIZE_CXXFLAGS)
692 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
698 dnl All installation directory information is determined here.
702 dnl glibcxx_prefixdir
703 dnl glibcxx_toolexecdir
704 dnl glibcxx_toolexeclibdir
706 dnl Assumes cross_compiling bits already done, and with_cross_host in
709 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
710 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
711 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
712 glibcxx_toolexecdir=no
713 glibcxx_toolexeclibdir=no
714 glibcxx_prefixdir=$prefix
716 AC_MSG_CHECKING([for gxx-include-dir])
717 AC_ARG_WITH([gxx-include-dir],
718 AC_HELP_STRING([--with-gxx-include-dir=DIR],
719 [installation directory for include files]),
721 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
722 no) gxx_include_dir=no ;;
723 *) gxx_include_dir=$withval ;;
725 [gxx_include_dir=no])
726 AC_MSG_RESULT($gxx_include_dir)
728 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
729 AC_ARG_ENABLE([version-specific-runtime-libs],
730 AC_HELP_STRING([--enable-version-specific-runtime-libs],
731 [Specify that runtime libraries should be installed in a compiler-specific directory]),
732 [case "$enableval" in
733 yes) version_specific_libs=yes ;;
734 no) version_specific_libs=no ;;
735 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
737 [version_specific_libs=no])
738 AC_MSG_RESULT($version_specific_libs)
740 # Default case for install directory for include files.
741 if test $version_specific_libs = no && test $gxx_include_dir = no; then
742 gxx_include_dir='include/c++/${gcc_version}'
743 if test -n "$with_cross_host" &&
744 test x"$with_cross_host" != x"no"; then
745 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
747 gxx_include_dir='${prefix}/'"$gxx_include_dir"
751 # Version-specific runtime libs processing.
752 if test $version_specific_libs = yes; then
753 # Need the gcc compiler version to know where to install libraries
754 # and header files if --enable-version-specific-runtime-libs option
755 # is selected. FIXME: these variables are misnamed, there are
756 # no executables installed in _toolexecdir or _toolexeclibdir.
757 if test x"$gxx_include_dir" = x"no"; then
758 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
760 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
761 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
764 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
765 # Install a library built with a cross compiler in tooldir, not libdir.
766 if test x"$glibcxx_toolexecdir" = x"no"; then
767 if test -n "$with_cross_host" &&
768 test x"$with_cross_host" != x"no"; then
769 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
770 glibcxx_toolexeclibdir='${toolexecdir}/lib'
772 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
773 glibcxx_toolexeclibdir='${libdir}'
775 multi_os_directory=`$CXX -print-multi-os-directory`
776 case $multi_os_directory in
777 .) ;; # Avoid trailing /.
778 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
782 AC_MSG_CHECKING([for install location])
783 AC_MSG_RESULT($gxx_include_dir)
785 AC_SUBST(glibcxx_prefixdir)
786 AC_SUBST(gxx_include_dir)
787 AC_SUBST(glibcxx_toolexecdir)
788 AC_SUBST(glibcxx_toolexeclibdir)
794 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
795 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
796 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
798 dnl See docs/html/17_intro/configury.html#enable for documentation.
800 m4_define([GLIBCXX_ENABLE],[dnl
801 m4_define([_g_switch],[--enable-$1])dnl
802 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
803 AC_ARG_ENABLE($1,_g_help,
808 m4_bpatsubst([$5],[permit ])) ;;
809 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
810 dnl Idea for future: generate a URL pointing to
811 dnl "onlinedocs/configopts.html#whatever"
818 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
822 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
823 m4_undefine([_g_switch])dnl
824 m4_undefine([_g_help])dnl
829 dnl Check for ISO/IEC 9899:1999 "C99" support.
831 dnl --enable-c99 defines _GLIBCXX_USE_C99
832 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
833 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
834 dnl Where DEFAULT is either `yes' or `no'.
835 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
837 AC_DEFUN([GLIBCXX_ENABLE_C99], [
838 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
840 if test x"$enable_c99" = x"yes"; then
845 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
846 # undefined and fake C99 facilities - like pre-standard snprintf - may be
847 # spuriously enabled.
848 # Long term, -std=c++0x could be even better, could manage to explicitely
849 # request C99 facilities to the underlying C headers.
850 ac_save_CXXFLAGS="$CXXFLAGS"
851 CXXFLAGS="$CXXFLAGS -std=c++98"
853 ac_save_gcc_no_link="$gcc_no_link"
855 if test x$gcc_no_link != xyes; then
856 # Use -fno-exceptions to that the C driver can link these tests without
857 # hitting undefined references to personality routines.
858 CXXFLAGS="$CXXFLAGS -fno-exceptions"
859 AC_CHECK_LIB(m, sin, [
862 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
867 # Check for the existence of <math.h> functions used if C99 is enabled.
868 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
869 AC_CACHE_VAL(glibcxx_cv_c99_math, [
870 GCC_TRY_COMPILE_OR_LINK(
872 volatile double d1, d2;
880 i = isgreater(d1, d2);
881 i = isgreaterequal(d1, d2);
883 i = islessequal(d1, d2);
884 i = islessgreater(d1, d2);
885 i = islessgreater(d1, d2);
886 i = isunordered(d1, d2);
887 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
889 AC_MSG_RESULT($glibcxx_cv_c99_math)
890 if test x"$glibcxx_cv_c99_math" = x"yes"; then
891 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
892 [Define if C99 functions or macros in <math.h> should be imported
893 in <cmath> in namespace std.])
896 # Check for the existence of <complex.h> complex math functions.
897 # This is necessary even though libstdc++ uses the builtin versions
898 # of these functions, because if the builtin cannot be used, a reference
899 # to the library function is emitted.
900 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
901 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
902 glibcxx_cv_c99_complex=no;
903 if test x"$ac_has_complex_h" = x"yes"; then
904 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
905 GCC_TRY_COMPILE_OR_LINK(
906 [#include <complex.h>
907 typedef __complex__ float float_type;
908 typedef __complex__ double double_type;
909 typedef __complex__ long double ld_type;
910 volatile float_type tmpf;
911 volatile double_type tmpd;
912 volatile ld_type tmpld;
915 volatile long double ld;],
927 tmpf = cpowf(tmpf, tmpf);
940 tmpd = cpow(tmpd, tmpd);
944 tmpld = ccosl(tmpld);
945 tmpld = ccoshl(tmpld);
946 tmpld = cexpl(tmpld);
947 tmpld = clogl(tmpld);
948 tmpld = csinl(tmpld);
949 tmpld = csinhl(tmpld);
950 tmpld = csqrtl(tmpld);
951 tmpld = ctanl(tmpld);
952 tmpld = ctanhl(tmpld);
953 tmpld = cpowl(tmpld, tmpld);
954 tmpld = cprojl(tmpld);
955 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
957 AC_MSG_RESULT($glibcxx_cv_c99_complex)
958 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
959 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
960 [Define if C99 functions in <complex.h> should be used in
961 <complex>. Using compiler builtins for these functions requires
962 corresponding C99 library functions to be present.])
965 # Check for the existence in <stdio.h> of vscanf, et. al.
966 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
967 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
968 GCC_TRY_COMPILE_OR_LINK(
971 void foo(char* fmt, ...)
973 va_list args; va_start(args, fmt);
974 vfscanf(stderr, "%i", args);
976 vsnprintf(fmt, 0, "%i", args);
977 vsscanf(fmt, "%i", args);
979 [snprintf("12", 0, "%i");],
980 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
982 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
984 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
985 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
986 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
987 GCC_TRY_COMPILE_OR_LINK(
990 volatile long double ld;
991 volatile unsigned long long ll;
994 f = strtof("gnu", &tmp);
995 ld = strtold("gnu", &tmp);
996 ll = strtoll("gnu", &tmp, 10);
997 ll = strtoull("gnu", &tmp, 10);
999 mydivt = lldiv(10,1);
1004 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
1006 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
1008 # Check for the existence in <wchar.h> of wcstold, etc.
1009 glibcxx_cv_c99_wchar=no;
1010 if test x"$ac_has_wchar_h" = xyes &&
1011 test x"$ac_has_wctype_h" = xyes; then
1012 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1013 AC_TRY_COMPILE([#include <wchar.h>
1020 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
1022 # Checks for wide character functions that may not be present.
1023 # Injection of these is wrapped with guard macros.
1024 # NB: only put functions here, instead of immediately above, if
1025 # absolutely necessary.
1026 AC_TRY_COMPILE([#include <wchar.h>
1027 namespace test { using ::vfwscanf; } ], [],
1028 [AC_DEFINE(HAVE_VFWSCANF,1,
1029 [Defined if vfwscanf exists.])],[])
1031 AC_TRY_COMPILE([#include <wchar.h>
1032 namespace test { using ::vswscanf; } ], [],
1033 [AC_DEFINE(HAVE_VSWSCANF,1,
1034 [Defined if vswscanf exists.])],[])
1036 AC_TRY_COMPILE([#include <wchar.h>
1037 namespace test { using ::vwscanf; } ], [],
1038 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1040 AC_TRY_COMPILE([#include <wchar.h>
1041 namespace test { using ::wcstof; } ], [],
1042 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1044 AC_TRY_COMPILE([#include <wctype.h>],
1045 [ wint_t t; int i = iswblank(t);],
1046 [AC_DEFINE(HAVE_ISWBLANK,1,
1047 [Defined if iswblank exists.])],[])
1049 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1052 # Option parsed, now set things appropriately.
1053 if test x"$glibcxx_cv_c99_math" = x"no" ||
1054 test x"$glibcxx_cv_c99_complex" = x"no" ||
1055 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1056 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1057 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1060 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1061 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1062 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1065 gcc_no_link="$ac_save_gcc_no_link"
1066 LIBS="$ac_save_LIBS"
1067 CXXFLAGS="$ac_save_CXXFLAGS"
1071 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1072 AC_MSG_RESULT($enable_c99)
1077 dnl Check for IEEE Std 1003.1-2001 clock_gettime required for
1078 dnl 20.8.5 [time.clock] in the current C++0X working draft.
1080 AC_DEFUN([GLIBCXX_CHECK_CLOCK_GETTIME], [
1084 ac_save_CXXFLAGS="$CXXFLAGS"
1085 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1086 ac_save_LIBS="$LIBS"
1088 AC_SEARCH_LIBS(clock_gettime, [posix4])
1091 case "$ac_cv_search_clock_gettime" in
1092 -lposix4*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1095 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1097 ac_has_clock_monotonic=no;
1098 ac_has_clock_realtime=no;
1099 if test x"$ac_has_unistd_h" = x"yes"; then
1100 AC_MSG_CHECKING([for monotonic clock])
1102 [#include <unistd.h>
1105 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1108 clock_gettime(CLOCK_MONOTONIC, &tp);
1109 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1111 AC_MSG_RESULT($ac_has_clock_monotonic)
1113 AC_MSG_CHECKING([for realtime clock])
1115 [#include <unistd.h>
1118 [#if _POSIX_TIMERS > 0
1121 clock_gettime(CLOCK_REALTIME, &tp);
1122 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1124 AC_MSG_RESULT($ac_has_clock_realtime)
1127 if test x"$ac_has_clock_monotonic" = x"yes"; then
1128 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1129 [ Defined if clock_gettime has monotonic clock support. ])
1132 if test x"$ac_has_clock_realtime" = x"yes"; then
1133 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1134 [ Defined if clock_gettime has realtime clock support. ])
1137 AC_SUBST(GLIBCXX_LIBS)
1139 CXXFLAGS="$ac_save_CXXFLAGS"
1140 LIBS="$ac_save_LIBS"
1145 dnl Check for IEEE Std 1003.1-2001 gettimeofday required for
1146 dnl 20.8.5 [time.clock] in the current C++0X working draft.
1148 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1152 ac_save_CXXFLAGS="$CXXFLAGS"
1153 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1155 ac_has_gettimeofday=no;
1156 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1157 if test x"$ac_has_sys_time_h" = x"yes"; then
1158 AC_MSG_CHECKING([for gettimeofday])
1159 AC_TRY_LINK([#include <sys/time.h>],
1160 [timeval tv; gettimeofday(&tv, 0);],
1161 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1163 AC_MSG_RESULT($ac_has_gettimeofday)
1166 if test x"$ac_has_gettimeofday" = x"yes"; then
1167 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1168 [ Defined if gettimeofday is available. ])
1171 CXXFLAGS="$ac_save_CXXFLAGS"
1176 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1177 dnl facilities in Chapter 8, "C compatibility".
1179 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1184 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1185 # undefined and fake C99 facilities may be spuriously enabled.
1186 ac_save_CXXFLAGS="$CXXFLAGS"
1187 CXXFLAGS="$CXXFLAGS -std=c++98"
1189 # Check for the existence of <complex.h> complex math functions used
1191 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1192 ac_c99_complex_tr1=no;
1193 if test x"$ac_has_complex_h" = x"yes"; then
1194 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1195 AC_TRY_COMPILE([#include <complex.h>],
1196 [typedef __complex__ float float_type; float_type tmpf;
1203 typedef __complex__ double double_type; double_type tmpd;
1210 typedef __complex__ long double ld_type; ld_type tmpld;
1217 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1219 AC_MSG_RESULT($ac_c99_complex_tr1)
1220 if test x"$ac_c99_complex_tr1" = x"yes"; then
1221 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1222 [Define if C99 functions in <complex.h> should be used in
1223 <tr1/complex>. Using compiler builtins for these functions
1224 requires corresponding C99 library functions to be present.])
1227 # Check for the existence of <ctype.h> functions.
1228 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1229 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1230 AC_TRY_COMPILE([#include <ctype.h>],
1234 ],[glibcxx_cv_c99_ctype_tr1=yes],
1235 [glibcxx_cv_c99_ctype_tr1=no])
1237 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1238 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1239 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1240 [Define if C99 functions in <ctype.h> should be imported in
1241 <tr1/cctype> in namespace std::tr1.])
1244 # Check for the existence of <fenv.h> functions.
1245 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1247 if test x"$ac_has_fenv_h" = x"yes"; then
1248 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1249 AC_TRY_COMPILE([#include <fenv.h>],
1254 ret = feclearexcept(except);
1255 ret = fegetexceptflag(pflag, except);
1256 ret = feraiseexcept(except);
1257 ret = fesetexceptflag(pflag, except);
1258 ret = fetestexcept(except);
1260 ret = fesetround(mode);
1261 ret = fegetenv(penv);
1262 ret = feholdexcept(penv);
1263 ret = fesetenv(penv);
1264 ret = feupdateenv(penv);
1265 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1267 AC_MSG_RESULT($ac_c99_fenv_tr1)
1268 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1269 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1270 [Define if C99 functions in <fenv.h> should be imported in
1271 <tr1/cfenv> in namespace std::tr1.])
1274 # Check for the existence of <stdint.h> types.
1275 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1276 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1277 AC_TRY_COMPILE([#include <stdint.h>],
1278 [typedef int8_t my_int8_t;
1279 typedef int16_t my_int16_t;
1280 typedef int32_t my_int32_t;
1281 typedef int64_t my_int64_t;
1282 typedef int_fast8_t my_int_fast8_t;
1283 typedef int_fast16_t my_int_fast16_t;
1284 typedef int_fast32_t my_int_fast32_t;
1285 typedef int_fast64_t my_int_fast64_t;
1286 typedef int_least8_t my_int_least8_t;
1287 typedef int_least16_t my_int_least16_t;
1288 typedef int_least32_t my_int_least32_t;
1289 typedef int_least64_t my_int_least64_t;
1290 typedef intmax_t my_intmax_t;
1291 typedef intptr_t my_intptr_t;
1292 typedef uint8_t my_uint8_t;
1293 typedef uint16_t my_uint16_t;
1294 typedef uint32_t my_uint32_t;
1295 typedef uint64_t my_uint64_t;
1296 typedef uint_fast8_t my_uint_fast8_t;
1297 typedef uint_fast16_t my_uint_fast16_t;
1298 typedef uint_fast32_t my_uint_fast32_t;
1299 typedef uint_fast64_t my_uint_fast64_t;
1300 typedef uint_least8_t my_uint_least8_t;
1301 typedef uint_least16_t my_uint_least16_t;
1302 typedef uint_least32_t my_uint_least32_t;
1303 typedef uint_least64_t my_uint_least64_t;
1304 typedef uintmax_t my_uintmax_t;
1305 typedef uintptr_t my_uintptr_t;
1306 ],[glibcxx_cv_c99_stdint_tr1=yes],
1307 [glibcxx_cv_c99_stdint_tr1=no])
1309 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1310 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1311 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1312 [Define if C99 types in <stdint.h> should be imported in
1313 <tr1/cstdint> in namespace std::tr1.])
1316 # Check for the existence of <math.h> functions.
1317 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1318 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1319 AC_TRY_COMPILE([#include <math.h>],
1320 [typedef double_t my_double_t;
1321 typedef float_t my_float_t;
1335 copysignf(0.0f, 0.0f);
1336 copysignl(0.0l, 0.0l);
1353 fmaf(0.0f, 0.0f, 0.0f);
1354 fmal(0.0l, 0.0l, 0.0l);
1397 nextafter(0.0, 0.0);
1398 nextafterf(0.0f, 0.0f);
1399 nextafterl(0.0l, 0.0l);
1400 nexttoward(0.0, 0.0);
1401 nexttowardf(0.0f, 0.0f);
1402 nexttowardl(0.0l, 0.0l);
1403 remainder(0.0, 0.0);
1404 remainderf(0.0f, 0.0f);
1405 remainderl(0.0l, 0.0l);
1406 remquo(0.0, 0.0, 0);
1407 remquo(0.0f, 0.0f, 0);
1408 remquo(0.0l, 0.0l, 0);
1427 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1429 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1430 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1431 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1432 [Define if C99 functions or macros in <math.h> should be imported
1433 in <tr1/cmath> in namespace std::tr1.])
1436 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1437 # sense if the previous check fails, per C99, 7.8/1).
1438 ac_c99_inttypes_tr1=no;
1439 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1440 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1441 AC_TRY_COMPILE([#include <inttypes.h>],
1442 [intmax_t i, numer, denom, base;
1445 intmax_t ret = imaxabs(i);
1446 imaxdiv_t dret = imaxdiv(numer, denom);
1447 ret = strtoimax(s, endptr, base);
1448 uintmax_t uret = strtoumax(s, endptr, base);
1449 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1451 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1452 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1453 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1454 [Define if C99 functions in <inttypes.h> should be imported in
1455 <tr1/cinttypes> in namespace std::tr1.])
1458 # Check for the existence of the <stdbool.h> header.
1459 AC_CHECK_HEADERS(stdbool.h)
1461 CXXFLAGS="$ac_save_CXXFLAGS"
1466 dnl Check whether "dev/random" and "dev/urandom" are available for the
1467 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1469 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1471 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1472 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1473 AC_TRY_RUN([#include <stdio.h>
1476 return !(fopen("/dev/random", "r")
1477 && fopen("/dev/urandom", "r"));
1480 [glibcxx_cv_random_tr1=yes], [glibcxx_cv_random_tr1=no],
1481 [glibcxx_cv_random_tr1=no])
1483 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1484 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1485 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1486 [Define if dev/random and dev/urandom are available for
1487 the random_device of TR1 (Chapter 5.1).])
1493 dnl Check whether EOF, SEEK_CUR, and SEEK_END have the most common values:
1494 dnl in that case including <cstdio> in some C++ headers can be avoided.
1496 AC_DEFUN([GLIBCXX_CHECK_STDIO_MACROS], [
1498 AC_MSG_CHECKING([for EOF == -1, SEEK_CUR == 1, SEEK_END == 2])
1499 AC_CACHE_VAL(glibcxx_cv_stdio_macros, [
1500 AC_TRY_COMPILE([#include <stdio.h>],
1501 [#if ((EOF != -1) || (SEEK_CUR != 1) || (SEEK_END != 2))
1504 ], [glibcxx_cv_stdio_macros=yes],
1505 [glibcxx_cv_stdio_macros=no])
1507 AC_MSG_RESULT($glibcxx_cv_stdio_macros)
1508 if test x"$glibcxx_cv_stdio_macros" = x"yes"; then
1509 AC_DEFINE(_GLIBCXX_STDIO_MACROS, 1,
1510 [Define if EOF == -1, SEEK_CUR == 1, SEEK_END == 2.])
1516 dnl Check whether macros, etc are present for <system_error>
1518 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1520 m4_pushdef([n_syserr], [1])dnl
1521 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1522 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1523 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1524 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1525 AC_MSG_CHECKING([for syserr])
1526 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1527 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1528 [int i = syserr;])],
1529 [glibcxx_cv_system_error[]n_syserr=yes],
1530 [glibcxx_cv_system_error[]n_syserr=no])
1532 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1533 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1534 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1536 m4_define([n_syserr], m4_incr(n_syserr))dnl
1537 m4_popdef([SYSERR])dnl
1539 m4_popdef([n_syserr])dnl
1543 dnl Check whether C++200x's standard layout types are supported.
1545 AC_DEFUN([GLIBCXX_CHECK_STANDARD_LAYOUT], [
1547 AC_MSG_CHECKING([for ISO C++200x standard layout type support])
1548 AC_CACHE_VAL(ac_standard_layout, [
1551 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1552 ac_save_CXXFLAGS="$CXXFLAGS"
1553 CXXFLAGS='-std=gnu++0x'
1555 AC_TRY_COMPILE([struct b
1559 // Need standard layout relaxation from POD
1561 b& operator=(const b&);
1570 [ac_standard_layout=yes], [ac_standard_layout=no])
1572 CXXFLAGS="$ac_save_CXXFLAGS"
1575 AC_MSG_RESULT($ac_standard_layout)
1576 if test x"$ac_standard_layout" = x"yes"; then
1577 AC_DEFINE(_GLIBCXX_USE_STANDARD_LAYOUT, 1,
1578 [Define if standard layout types are supported in C++200x.])
1583 dnl Check for what type of C headers to use.
1585 dnl --enable-cheaders= [does stuff].
1586 dnl --disable-cheaders [does not do anything, really].
1587 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1588 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1590 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1591 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1592 [construct "C" headers for g++], [permit c|c_std|c_global])
1593 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1595 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1597 # Allow overrides to configure.host here.
1598 if test $enable_cheaders = c_global; then
1602 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1606 AC_SUBST(C_INCLUDE_DIR)
1607 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1608 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1609 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1610 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1611 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1616 dnl Check for which locale library to use. The choice is mapped to
1617 dnl a subdirectory of config/locale.
1619 dnl Default is generic.
1621 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1622 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1623 [use MODEL for target locale package],
1624 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1626 # Deal with gettext issues. Default to not using it (=no) until we detect
1627 # support for it later. Let the user turn it off via --e/d, but let that
1628 # default to on for easier handling.
1631 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1635 # Either a known packaage, or "auto"
1636 if test $enable_clocale = no || test $enable_clocale = yes; then
1639 enable_clocale_flag=$enable_clocale
1641 # Probe for locale model to use if none specified.
1642 # Default to "generic".
1643 if test $enable_clocale_flag = auto; then
1644 case ${target_os} in
1645 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1646 enable_clocale_flag=gnu
1649 enable_clocale_flag=darwin
1652 enable_clocale_flag=generic
1657 # Sanity check model, and test for special functionality.
1658 if test $enable_clocale_flag = gnu; then
1659 AC_EGREP_CPP([_GLIBCXX_ok], [
1660 #include <features.h>
1661 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1664 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1666 if test $enable_clocale = auto; then
1667 # Test for bugs early in glibc-2.2.x series
1669 #define _GNU_SOURCE 1
1672 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1673 extern __typeof(newlocale) __newlocale;
1674 extern __typeof(duplocale) __duplocale;
1675 extern __typeof(strcoll_l) __strcoll_l;
1679 const char __one[] = "Äuglein Augmen";
1680 const char __two[] = "Äuglein";
1685 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1686 loc_dup = __duplocale(loc);
1687 i = __strcoll_l(__one, __two, loc);
1688 j = __strcoll_l(__one, __two, loc_dup);
1692 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1693 [enable_clocale_flag=generic])
1696 # Set it to scream when it hurts.
1697 ac_save_CFLAGS="$CFLAGS"
1698 CFLAGS="-Wimplicit-function-declaration -Werror"
1700 # Use strxfrm_l if available.
1701 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1703 #include <locale.h>],
1704 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1705 AC_DEFINE(HAVE_STRXFRM_L, 1,
1706 [Define if strxfrm_l is available in <string.h>.]),)
1708 # Use strerror_l if available.
1709 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1711 #include <locale.h>],
1712 [__locale_t loc; strerror_l(5, loc);],
1713 AC_DEFINE(HAVE_STRERROR_L, 1,
1714 [Define if strerror_l is available in <string.h>.]),)
1716 CFLAGS="$ac_save_CFLAGS"
1719 # Perhaps use strerror_r if available, and strerror_l isn't.
1720 ac_save_CFLAGS="$CFLAGS"
1721 CFLAGS="-Wimplicit-function-declaration -Werror"
1722 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1724 #include <locale.h>],
1725 [char s[128]; strerror_r(5, s, 128);],
1726 AC_DEFINE(HAVE_STRERROR_R, 1,
1727 [Define if strerror_r is available in <string.h>.]),)
1728 CFLAGS="$ac_save_CFLAGS"
1730 # Set configure bits for specified locale package
1731 AC_MSG_CHECKING([for C locale to use])
1732 case ${enable_clocale_flag} in
1734 AC_MSG_RESULT(generic)
1736 CLOCALE_H=config/locale/generic/c_locale.h
1737 CLOCALE_CC=config/locale/generic/c_locale.cc
1738 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1739 CCOLLATE_CC=config/locale/generic/collate_members.cc
1740 CCTYPE_CC=config/locale/generic/ctype_members.cc
1741 CMESSAGES_H=config/locale/generic/messages_members.h
1742 CMESSAGES_CC=config/locale/generic/messages_members.cc
1743 CMONEY_CC=config/locale/generic/monetary_members.cc
1744 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1745 CTIME_H=config/locale/generic/time_members.h
1746 CTIME_CC=config/locale/generic/time_members.cc
1747 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1750 AC_MSG_RESULT(darwin or freebsd)
1752 CLOCALE_H=config/locale/generic/c_locale.h
1753 CLOCALE_CC=config/locale/generic/c_locale.cc
1754 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1755 CCOLLATE_CC=config/locale/generic/collate_members.cc
1756 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1757 CMESSAGES_H=config/locale/generic/messages_members.h
1758 CMESSAGES_CC=config/locale/generic/messages_members.cc
1759 CMONEY_CC=config/locale/generic/monetary_members.cc
1760 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1761 CTIME_H=config/locale/generic/time_members.h
1762 CTIME_CC=config/locale/generic/time_members.cc
1763 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1769 # Declare intention to use gettext, and add support for specific
1771 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1774 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1775 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1776 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1779 # Export the build objects.
1780 for ling in $ALL_LINGUAS; do \
1781 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1782 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1784 AC_SUBST(glibcxx_MOFILES)
1785 AC_SUBST(glibcxx_POFILES)
1787 CLOCALE_H=config/locale/gnu/c_locale.h
1788 CLOCALE_CC=config/locale/gnu/c_locale.cc
1789 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1790 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1791 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1792 CMESSAGES_H=config/locale/gnu/messages_members.h
1793 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1794 CMONEY_CC=config/locale/gnu/monetary_members.cc
1795 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1796 CTIME_H=config/locale/gnu/time_members.h
1797 CTIME_CC=config/locale/gnu/time_members.cc
1798 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1801 AC_MSG_RESULT(IEEE 1003.1)
1803 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1804 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1805 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1806 CCOLLATE_CC=config/locale/generic/collate_members.cc
1807 CCTYPE_CC=config/locale/generic/ctype_members.cc
1808 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1809 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1810 CMONEY_CC=config/locale/generic/monetary_members.cc
1811 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1812 CTIME_H=config/locale/generic/time_members.h
1813 CTIME_CC=config/locale/generic/time_members.cc
1814 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1818 # This is where the testsuite looks for locale catalogs, using the
1819 # -DLOCALEDIR define during testsuite compilation.
1820 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1821 AC_SUBST(glibcxx_localedir)
1823 # A standalone libintl (e.g., GNU libintl) may be in use.
1824 if test $USE_NLS = yes; then
1825 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1826 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1828 if test $USE_NLS = yes; then
1829 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1830 [Define if NLS translations are to be used.])
1835 AC_SUBST(CMESSAGES_H)
1836 AC_SUBST(CCODECVT_CC)
1837 AC_SUBST(CCOLLATE_CC)
1839 AC_SUBST(CMESSAGES_CC)
1841 AC_SUBST(CNUMERIC_CC)
1844 AC_SUBST(CLOCALE_CC)
1845 AC_SUBST(CLOCALE_INTERNAL_H)
1850 dnl Check for which std::allocator base class to use. The choice is
1851 dnl mapped from a subdirectory of include/ext.
1855 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1856 AC_MSG_CHECKING([for std::allocator base class])
1857 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1858 [use KIND for target std::allocator base],
1859 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1861 # If they didn't use this option switch, or if they specified --enable
1862 # with no specific model, we'll have to look for one. If they
1863 # specified --disable (???), do likewise.
1864 if test $enable_libstdcxx_allocator = no ||
1865 test $enable_libstdcxx_allocator = yes;
1867 enable_libstdcxx_allocator=auto
1870 # Either a known package, or "auto". Auto implies the default choice
1871 # for a particular platform.
1872 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1874 # Probe for host-specific support if no specific model is specified.
1876 if test $enable_libstdcxx_allocator_flag = auto; then
1877 case ${target_os} in
1878 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1879 enable_libstdcxx_allocator_flag=new
1882 enable_libstdcxx_allocator_flag=new
1886 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1889 # Set configure bits for specified locale package
1890 case ${enable_libstdcxx_allocator_flag} in
1892 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1893 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1896 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1897 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1900 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1901 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1904 ALLOCATOR_H=config/allocator/new_allocator_base.h
1905 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1908 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1909 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1913 AC_SUBST(ALLOCATOR_H)
1914 AC_SUBST(ALLOCATOR_NAME)
1919 dnl Check for whether the Boost-derived checks should be turned on.
1921 dnl --enable-concept-checks turns them on.
1922 dnl --disable-concept-checks leaves them off.
1923 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1924 dnl Where DEFAULT is either `yes' or `no'.
1926 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1927 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1928 if test $enable_concept_checks = yes; then
1929 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1930 [Define to use concept checking code from the boost libraries.])
1935 dnl Check for parallel mode pre-requisites, including OpenMP support.
1937 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1939 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1943 # See if configured libgomp/omp.h exists. (libgomp may be in
1944 # noconfigdirs but not explicitly disabled.)
1945 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1946 enable_parallel=yes;
1948 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1951 AC_MSG_CHECKING([for parallel mode support])
1952 AC_MSG_RESULT([$enable_parallel])
1953 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1958 dnl Check for which I/O library to use: stdio, or something specific.
1960 dnl Default is stdio.
1962 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1963 AC_MSG_CHECKING([for underlying I/O to use])
1964 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1965 [use target-specific I/O package], [permit stdio])
1967 # Now that libio has been removed, you can have any color you want as long
1968 # as it's black. This is one big no-op until other packages are added, but
1969 # showing the framework never hurts.
1970 case ${enable_cstdio} in
1972 CSTDIO_H=config/io/c_io_stdio.h
1973 BASIC_FILE_H=config/io/basic_file_stdio.h
1974 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1975 AC_MSG_RESULT(stdio)
1980 AC_SUBST(BASIC_FILE_H)
1981 AC_SUBST(BASIC_FILE_CC)
1986 dnl Check for "unusual" flags to pass to the compiler while building.
1988 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1989 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1990 dnl --disable-cxx-flags passes nothing.
1991 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1992 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1993 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1994 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1995 dnl If "default flags" is an empty string, the effect is the same
1996 dnl as --disable or --enable=no.
1998 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1999 AC_MSG_CHECKING([for extra compiler flags for building])
2000 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2001 [pass compiler FLAGS when building library],
2002 [case "x$enable_cxx_flags" in
2003 xno | x) enable_cxx_flags= ;;
2005 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2008 # Run through flags (either default or command-line) and set anything
2009 # extra (e.g., #defines) that must accompany particular g++ options.
2010 if test -n "$enable_cxx_flags"; then
2011 for f in $enable_cxx_flags; do
2015 *) # and we're trying to pass /what/ exactly?
2016 AC_MSG_ERROR([compiler flags start with a -]) ;;
2021 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2022 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2023 AC_SUBST(EXTRA_CXX_FLAGS)
2028 dnl Check to see if debugging libraries are to be built.
2030 dnl --enable-libstdcxx-debug
2031 dnl builds a separate set of debugging libraries in addition to the
2032 dnl normal (shared, static) libstdc++ binaries.
2034 dnl --disable-libstdcxx-debug
2035 dnl builds only one (non-debug) version of libstdc++.
2037 dnl --enable-libstdcxx-debug-flags=FLAGS
2038 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2040 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2041 dnl Where DEFAULT is either `yes' or `no'.
2043 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2044 AC_MSG_CHECKING([for additional debug build])
2045 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2046 AC_MSG_RESULT($enable_libstdcxx_debug)
2047 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2052 dnl Check for explicit debug flags.
2054 dnl --enable-libstdcxx-debug-flags='-O1'
2055 dnl is a general method for passing flags to be used when
2056 dnl building debug libraries with --enable-debug.
2058 dnl --disable-libstdcxx-debug-flags does nothing.
2059 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2060 dnl If "default flags" is an empty string, the effect is the same
2061 dnl as --disable or --enable=no.
2063 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2064 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2065 [pass compiler FLAGS when building debug library],
2066 [case "x$enable_libstdcxx_debug_flags" in
2067 xno | x) enable_libstdcxx_debug_flags= ;;
2069 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2072 # Option parsed, now set things appropriately
2073 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2074 AC_SUBST(DEBUG_FLAGS)
2076 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2081 dnl Check if the user only wants a freestanding library implementation.
2083 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2084 dnl installing only the headers required by [17.4.1.3] and the language
2085 dnl support library. More than that will be built (to keep the Makefiles
2086 dnl conveniently clean), but not installed.
2089 dnl is_hosted (yes/no)
2092 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2094 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2095 AC_ARG_ENABLE([hosted-libstdcxx],
2096 AC_HELP_STRING([--disable-hosted-libstdcxx],
2097 [only build freestanding C++ runtime support]),,
2100 enable_hosted_libstdcxx=no
2103 enable_hosted_libstdcxx=yes
2106 if test "$enable_hosted_libstdcxx" = no; then
2107 AC_MSG_NOTICE([Only freestanding libraries will be built])
2111 enable_libstdcxx_pch=no
2116 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2117 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2118 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2123 dnl Check for template specializations for the 'long long' type.
2124 dnl The result determines only whether 'long long' I/O is enabled; things
2125 dnl like numeric_limits<> specializations are always available.
2127 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2128 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2129 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2130 dnl Where DEFAULT is either `yes' or `no'.
2132 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2133 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2134 if test $enable_long_long = yes; then
2135 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2136 [Define if code specialized for long long should be used.])
2138 AC_MSG_CHECKING([for enabled long long specializations])
2139 AC_MSG_RESULT([$enable_long_long])
2144 dnl Check for template specializations for the 'wchar_t' type.
2146 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2147 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2148 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2149 dnl Where DEFAULT is either `yes' or `no'.
2151 dnl Necessary support must also be present.
2153 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2154 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2156 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2157 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2158 AC_MSG_CHECKING([for mbstate_t])
2159 AC_TRY_COMPILE([#include <wchar.h>],
2160 [mbstate_t teststate;],
2161 have_mbstate_t=yes, have_mbstate_t=no)
2162 AC_MSG_RESULT($have_mbstate_t)
2163 if test x"$have_mbstate_t" = xyes; then
2164 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2167 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2169 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2171 if test x"$enable_wchar_t" = x"yes"; then
2176 if test x"$ac_has_wchar_h" = xyes &&
2177 test x"$ac_has_wctype_h" = xyes; then
2178 AC_TRY_COMPILE([#include <wchar.h>
2239 ],[],[], [enable_wchar_t=no])
2247 if test x"$enable_wchar_t" = x"yes"; then
2248 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2249 [Define if code specialized for wchar_t should be used.])
2252 AC_MSG_CHECKING([for enabled wchar_t specializations])
2253 AC_MSG_RESULT([$enable_wchar_t])
2258 dnl Check to see if building and using a C++ precompiled header can be done.
2260 dnl --enable-libstdcxx-pch=yes
2261 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2262 dnl may work, after some light-hearted attempts to puzzle out compiler
2263 dnl support, flip bits on in include/Makefile.am
2265 dnl --disable-libstdcxx-pch
2266 dnl turns off attempts to use or build stdc++.h.gch.
2269 dnl glibcxx_PCHFLAGS
2271 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2272 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2273 if test $enable_libstdcxx_pch = yes; then
2274 AC_CACHE_CHECK([for compiler with PCH support],
2275 [glibcxx_cv_prog_CXX_pch],
2276 [ac_save_CXXFLAGS="$CXXFLAGS"
2277 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2280 echo '#include <math.h>' > conftest.h
2281 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2282 -o conftest.h.gch 1>&5 2>&1 &&
2283 echo '#error "pch failed"' > conftest.h &&
2284 echo '#include "conftest.h"' > conftest.cc &&
2285 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2287 glibcxx_cv_prog_CXX_pch=yes
2289 glibcxx_cv_prog_CXX_pch=no
2292 CXXFLAGS=$ac_save_CXXFLAGS
2295 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2298 AC_MSG_CHECKING([for enabled PCH])
2299 AC_MSG_RESULT([$enable_libstdcxx_pch])
2301 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2302 if test $enable_libstdcxx_pch = yes; then
2303 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2307 AC_SUBST(glibcxx_PCHFLAGS)
2312 dnl Check for atomic builtins.
2314 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2316 dnl This checks to see if the host supports the compiler-generated
2317 dnl builtins for atomic operations for various integral sizes. Note, this
2318 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2319 dnl that are used should be checked.
2322 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2323 dnl see: CHECK_SYNC_FETCH_AND_ADD
2326 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2327 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2329 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2332 old_CXXFLAGS="$CXXFLAGS"
2334 # Compile unoptimized.
2337 # Fake what AC_TRY_COMPILE does, without linking as this is
2338 # unnecessary for a builtins test.
2340 cat > conftest.$ac_ext << EOF
2341 [#]line __oline__ "configure"
2344 // NB: _Atomic_word not necessarily int.
2345 typedef int atomic_type;
2348 const atomic_type c3(0);
2349 __sync_fetch_and_add(&c1, c2);
2350 __sync_val_compare_and_swap(&c1, c3, c2);
2351 __sync_lock_test_and_set(&c1, c3);
2352 __sync_lock_release(&c1);
2353 __sync_synchronize();
2358 AC_MSG_CHECKING([for atomic builtins for int])
2359 if AC_TRY_EVAL(ac_compile); then
2360 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2361 enable_atomic_builtinsi=no
2363 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2364 [Define if builtin atomic operations for int are supported on this host.])
2365 enable_atomic_builtinsi=yes
2368 AC_MSG_RESULT($enable_atomic_builtinsi)
2371 cat > conftest.$ac_ext << EOF
2372 [#]line __oline__ "configure"
2375 typedef bool atomic_type;
2378 const atomic_type c3(0);
2379 __sync_fetch_and_add(&c1, c2);
2380 __sync_val_compare_and_swap(&c1, c3, c2);
2381 __sync_lock_test_and_set(&c1, c3);
2382 __sync_lock_release(&c1);
2383 __sync_synchronize();
2388 AC_MSG_CHECKING([for atomic builtins for bool])
2389 if AC_TRY_EVAL(ac_compile); then
2390 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2391 enable_atomic_builtinsb=no
2393 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2394 [Define if builtin atomic operations for bool are supported on this host.])
2395 enable_atomic_builtinsb=yes
2398 AC_MSG_RESULT($enable_atomic_builtinsb)
2401 CXXFLAGS="$old_CXXFLAGS"
2404 # Set atomicity_dir to builtins if either of above tests pass.
2405 if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
2406 atomicity_dir=cpu/generic/atomicity_builtins
2409 # If still generic, set to mutex.
2410 if test $atomicity_dir = "cpu/generic" ; then
2411 atomicity_dir=cpu/generic/atomicity_mutex
2412 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2413 if test $target_thread_file = single; then
2414 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2415 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2417 AC_MSG_WARN([They will be faked using a mutex.])
2418 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2426 dnl Check for exception handling support. If an explicit enable/disable
2427 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2428 dnl target may or may not support call frame exceptions.
2430 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2431 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2432 dnl Neither one forces an attempt at detection.
2435 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2437 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2438 AC_MSG_CHECKING([for exception model to use])
2441 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2442 [force use of builtin_setjmp for exceptions],
2443 [permit yes|no|auto])
2445 if test $enable_sjlj_exceptions = auto; then
2446 # Botheration. Now we've got to detect the exception model. Link tests
2447 # against libgcc.a are problematic since we've not been given proper -L
2448 # bits for single-tree newlib and libgloss.
2450 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2451 cat > conftest.$ac_ext << EOF
2452 [#]line __oline__ "configure"
2461 old_CXXFLAGS="$CXXFLAGS"
2463 if AC_TRY_EVAL(ac_compile); then
2464 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2465 enable_sjlj_exceptions=yes
2466 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2467 enable_sjlj_exceptions=no
2468 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2469 enable_sjlj_exceptions=no
2472 CXXFLAGS="$old_CXXFLAGS"
2476 # This is a tad weird, for hysterical raisins. We have to map
2477 # enable/disable to two different models.
2478 case $enable_sjlj_exceptions in
2480 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2481 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2482 ac_exception_model_name=sjlj
2485 ac_exception_model_name="call frame"
2488 AC_MSG_ERROR([unable to detect exception model])
2492 AC_MSG_RESULT($ac_exception_model_name)
2497 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2499 dnl --enable-visibility enables attempt to use visibility attributes.
2500 dnl --disable-visibility turns off all use of visibility attributes.
2501 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2502 dnl Where DEFAULT is 'yes'.
2504 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2505 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2507 if test x$enable_visibility = xyes ; then
2508 dnl all hail libgfortran
2509 dnl Check whether the target supports hidden visibility.
2510 AC_CACHE_CHECK([whether the target supports hidden visibility],
2511 glibcxx_cv_have_attribute_visibility, [
2512 save_CFLAGS="$CFLAGS"
2513 CFLAGS="$CFLAGS -Werror"
2514 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2515 [], glibcxx_cv_have_attribute_visibility=yes,
2516 glibcxx_cv_have_attribute_visibility=no)
2517 CFLAGS="$save_CFLAGS"])
2518 if test $glibcxx_cv_have_attribute_visibility = no; then
2519 enable_visibility=no
2523 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2524 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2529 dnl Add version tags to symbols in shared library (or not), additionally
2530 dnl marking other symbols as private/local (or not).
2532 dnl --enable-symvers=style adds a version script to the linker call when
2533 dnl creating the shared library. The choice of version script is
2534 dnl controlled by 'style'.
2535 dnl --disable-symvers does not.
2536 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2537 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2538 dnl choose a default style based on linker characteristics. Passing
2539 dnl 'no' disables versioning.
2541 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2543 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2544 [enables symbol versioning of the shared library],
2545 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2547 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2548 # don't know enough about $LD to do tricks...
2549 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2551 # Turn a 'yes' into a suitable default.
2552 if test x$enable_symvers = xyes ; then
2553 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2556 if test $with_gnu_ld = yes ; then
2559 case ${target_os} in
2561 enable_symvers=darwin ;;
2563 enable_symvers=no ;;
2569 # Check to see if 'darwin' or 'darwin-export' can win.
2570 if test x$enable_symvers = xdarwin-export ; then
2571 enable_symvers=darwin
2574 # Check to see if 'gnu' can win.
2575 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2576 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2577 AC_MSG_CHECKING([for shared libgcc])
2578 ac_save_CFLAGS="$CFLAGS"
2580 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2581 CFLAGS="$ac_save_CFLAGS"
2582 if test $glibcxx_shared_libgcc = no; then
2583 cat > conftest.c <<EOF
2584 int main (void) { return 0; }
2587 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2588 -shared -shared-libgcc -o conftest.so \
2589 conftest.c -v 2>&1 >/dev/null \
2590 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2592 rm -f conftest.c conftest.so
2593 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2594 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2595 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2596 CFLAGS="$ac_save_CFLAGS"
2599 AC_MSG_RESULT($glibcxx_shared_libgcc)
2601 # For GNU ld, we need at least this version. The format is described in
2602 # GLIBCXX_CHECK_LINKER_FEATURES above.
2603 glibcxx_min_gnu_ld_version=21400
2605 # If no shared libgcc, can't win.
2606 if test $glibcxx_shared_libgcc != yes; then
2607 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2608 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2609 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2611 elif test $with_gnu_ld != yes ; then
2613 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2614 AC_MSG_WARN([=== you are not using the GNU linker.])
2615 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2617 elif test $glibcxx_ld_is_gold = yes ; then
2618 : All versions of gold support symbol versioning.
2619 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2620 # The right tools, the right setup, but too old. Fallbacks?
2621 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2622 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2623 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2624 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2625 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2630 # Everything parsed; figure out what file to use.
2631 case $enable_symvers in
2633 SYMVER_FILE=config/abi/pre/none.ver
2636 SYMVER_FILE=config/abi/pre/gnu.ver
2637 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2638 [Define to use GNU versioning in the shared library.])
2640 gnu-versioned-namespace)
2641 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2642 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2643 [Define to use GNU namespace versioning in the shared library.])
2646 SYMVER_FILE=config/abi/pre/gnu.ver
2647 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2648 [Define to use darwin versioning in the shared library.])
2652 if test x$enable_symvers != xno ; then
2653 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2654 [Define to use symbol versioning in the shared library.])
2657 AC_SUBST(SYMVER_FILE)
2658 AC_SUBST(port_specific_symbol_files)
2659 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2660 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2661 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2662 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2663 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2665 # Now, set up compatibility support, if any.
2666 # In addition, need this to deal with std::size_t mangling in
2667 # src/compatibility.cc. In a perfect world, could use
2668 # typeid(std::size_t).name()[0] to do direct substitution.
2669 AC_MSG_CHECKING([for size_t as unsigned int])
2670 ac_save_CFLAGS="$CFLAGS"
2672 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2673 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2674 CFLAGS=$ac_save_CFLAGS
2675 if test "$glibcxx_size_t_is_i" = yes; then
2676 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2678 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2680 AC_MSG_CHECKING([for ptrdiff_t as int])
2681 ac_save_CFLAGS="$CFLAGS"
2683 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2684 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2685 CFLAGS=$ac_save_CFLAGS
2686 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2687 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2689 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2694 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2695 dnl We must stage the required headers so that they will be installed
2696 dnl with the library (unlike libgcc, the STL implementation is provided
2697 dnl solely within headers). Since we must not inject random user-space
2698 dnl macro names into user-provided C++ code, we first stage into <file>-in
2699 dnl and process to <file> with an output command. The reason for a two-
2700 dnl stage process here is to correctly handle $srcdir!=$objdir without
2701 dnl having to write complex code (the sed commands to clean the macro
2702 dnl namespace are complex and fragile enough as it is). We must also
2703 dnl add a relative path so that -I- is supported properly.
2706 dnl glibcxx_thread_h
2709 dnl HAVE_GTHR_DEFAULT
2711 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2712 AC_MSG_CHECKING([for thread model used by GCC])
2713 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2714 AC_MSG_RESULT([$target_thread_file])
2716 if test $target_thread_file != single; then
2717 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2718 [Define if gthr-default.h exists
2719 (meaning that threading support is enabled).])
2722 glibcxx_thread_h=gthr-$target_thread_file.h
2724 dnl Check for __GTHREADS define.
2725 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2726 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2732 AC_SUBST(glibcxx_thread_h)
2736 # Check whether LC_MESSAGES is available in <locale.h>.
2737 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2739 # This file file be copied and used freely without restrictions. It can
2740 # be used in projects which are not available under the GNU Public License
2741 # but which still want to provide support for the GNU gettext functionality.
2742 # Please note that the actual code is *not* freely available.
2743 AC_DEFUN([AC_LC_MESSAGES], [
2744 AC_CHECK_HEADER(locale.h, [
2745 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2746 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
2747 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2748 if test $ac_cv_val_LC_MESSAGES = yes; then
2749 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2750 [Define if LC_MESSAGES is available in <locale.h>.])
2755 # Macros from the top-level gcc directory.
2756 m4_include([../config/tls.m4])