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 clock_gettime clocks, used in the implementation of 20.8.5
1078 dnl [time.clock] in the current C++0x working draft.
1080 dnl --enable-clock-gettime
1081 dnl --enable-clock-gettime=yes
1082 dnl checks for the availability of monotonic and realtime clocks
1083 dnl in libc and libposix4 and in case links the latter
1084 dnl --enable-clock-gettime=rt
1085 dnl also searches (and, in case, links) librt. Note that this is
1086 dnl not always desirable because, in glibc, for example, in turn it
1087 dnl triggers the linking of libpthread too, which activates locking,
1088 dnl a large overhead for single-thread programs.
1089 dnl --enable-clock-gettime=no
1090 dnl --disable-clock-gettime
1091 dnl disables the checks completely
1093 AC_DEFUN([GLIBCXX_ENABLE_CLOCK_GETTIME], [
1095 AC_MSG_CHECKING([for clock_gettime clocks])
1096 GLIBCXX_ENABLE(clock-gettime,$1,[=KIND],
1097 [use KIND for check type],
1102 ac_save_CXXFLAGS="$CXXFLAGS"
1103 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1104 ac_save_LIBS="$LIBS"
1106 ac_has_clock_monotonic=no;
1107 ac_has_clock_realtime=no;
1109 if test x"$enable_clock_gettime" != x"no"; then
1111 if test x"$enable_clock_gettime" = x"rt"; then
1112 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1114 AC_SEARCH_LIBS(clock_gettime, [posix4])
1117 case "$ac_cv_search_clock_gettime" in
1118 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1121 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1123 if test x"$ac_has_unistd_h" = x"yes"; then
1124 AC_MSG_CHECKING([for monotonic clock])
1126 [#include <unistd.h>
1129 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1132 clock_gettime(CLOCK_MONOTONIC, &tp);
1133 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1135 AC_MSG_RESULT($ac_has_clock_monotonic)
1137 AC_MSG_CHECKING([for realtime clock])
1139 [#include <unistd.h>
1142 [#if _POSIX_TIMERS > 0
1145 clock_gettime(CLOCK_REALTIME, &tp);
1146 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1148 AC_MSG_RESULT($ac_has_clock_realtime)
1153 if test x"$ac_has_clock_monotonic" = x"yes"; then
1154 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1155 [ Defined if clock_gettime has monotonic clock support. ])
1158 if test x"$ac_has_clock_realtime" = x"yes"; then
1159 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1160 [ Defined if clock_gettime has realtime clock support. ])
1163 AC_SUBST(GLIBCXX_LIBS)
1165 CXXFLAGS="$ac_save_CXXFLAGS"
1166 LIBS="$ac_save_LIBS"
1171 dnl Check for gettimeofday, used in the implementation of 20.8.5
1172 dnl [time.clock] in the current C++0x working draft.
1174 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1176 AC_MSG_CHECKING([for gettimeofday])
1180 ac_save_CXXFLAGS="$CXXFLAGS"
1181 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1183 ac_has_gettimeofday=no;
1184 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1185 if test x"$ac_has_sys_time_h" = x"yes"; then
1186 AC_MSG_CHECKING([for gettimeofday])
1187 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1188 [timeval tv; gettimeofday(&tv, 0);],
1189 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1191 AC_MSG_RESULT($ac_has_gettimeofday)
1194 if test x"$ac_has_gettimeofday" = x"yes"; then
1195 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1196 [ Defined if gettimeofday is available. ])
1199 CXXFLAGS="$ac_save_CXXFLAGS"
1204 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1205 dnl facilities in Chapter 8, "C compatibility".
1207 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1212 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1213 # undefined and fake C99 facilities may be spuriously enabled.
1214 ac_save_CXXFLAGS="$CXXFLAGS"
1215 CXXFLAGS="$CXXFLAGS -std=c++98"
1217 # Check for the existence of <complex.h> complex math functions used
1219 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1220 ac_c99_complex_tr1=no;
1221 if test x"$ac_has_complex_h" = x"yes"; then
1222 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1223 AC_TRY_COMPILE([#include <complex.h>],
1224 [typedef __complex__ float float_type; float_type tmpf;
1231 typedef __complex__ double double_type; double_type tmpd;
1238 typedef __complex__ long double ld_type; ld_type tmpld;
1245 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1247 AC_MSG_RESULT($ac_c99_complex_tr1)
1248 if test x"$ac_c99_complex_tr1" = x"yes"; then
1249 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1250 [Define if C99 functions in <complex.h> should be used in
1251 <tr1/complex>. Using compiler builtins for these functions
1252 requires corresponding C99 library functions to be present.])
1255 # Check for the existence of <ctype.h> functions.
1256 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1257 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1258 AC_TRY_COMPILE([#include <ctype.h>],
1262 ],[glibcxx_cv_c99_ctype_tr1=yes],
1263 [glibcxx_cv_c99_ctype_tr1=no])
1265 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1266 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1267 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1268 [Define if C99 functions in <ctype.h> should be imported in
1269 <tr1/cctype> in namespace std::tr1.])
1272 # Check for the existence of <fenv.h> functions.
1273 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1275 if test x"$ac_has_fenv_h" = x"yes"; then
1276 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1277 AC_TRY_COMPILE([#include <fenv.h>],
1282 ret = feclearexcept(except);
1283 ret = fegetexceptflag(pflag, except);
1284 ret = feraiseexcept(except);
1285 ret = fesetexceptflag(pflag, except);
1286 ret = fetestexcept(except);
1288 ret = fesetround(mode);
1289 ret = fegetenv(penv);
1290 ret = feholdexcept(penv);
1291 ret = fesetenv(penv);
1292 ret = feupdateenv(penv);
1293 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1295 AC_MSG_RESULT($ac_c99_fenv_tr1)
1296 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1297 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1298 [Define if C99 functions in <fenv.h> should be imported in
1299 <tr1/cfenv> in namespace std::tr1.])
1302 # Check for the existence of <stdint.h> types.
1303 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1304 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1305 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1306 #define __STDC_CONSTANT_MACROS
1307 #include <stdint.h>],
1308 [typedef int8_t my_int8_t;
1309 my_int8_t i8 = INT8_MIN;
1311 typedef int16_t my_int16_t;
1312 my_int16_t i16 = INT16_MIN;
1314 typedef int32_t my_int32_t;
1315 my_int32_t i32 = INT32_MIN;
1317 typedef int64_t my_int64_t;
1318 my_int64_t i64 = INT64_MIN;
1320 typedef int_fast8_t my_int_fast8_t;
1321 my_int_fast8_t if8 = INT_FAST8_MIN;
1322 if8 = INT_FAST8_MAX;
1323 typedef int_fast16_t my_int_fast16_t;
1324 my_int_fast16_t if16 = INT_FAST16_MIN;
1325 if16 = INT_FAST16_MAX;
1326 typedef int_fast32_t my_int_fast32_t;
1327 my_int_fast32_t if32 = INT_FAST32_MIN;
1328 if32 = INT_FAST32_MAX;
1329 typedef int_fast64_t my_int_fast64_t;
1330 my_int_fast64_t if64 = INT_FAST64_MIN;
1331 if64 = INT_FAST64_MAX;
1332 typedef int_least8_t my_int_least8_t;
1333 my_int_least8_t il8 = INT_LEAST8_MIN;
1334 il8 = INT_LEAST8_MAX;
1335 typedef int_least16_t my_int_least16_t;
1336 my_int_least16_t il16 = INT_LEAST16_MIN;
1337 il16 = INT_LEAST16_MAX;
1338 typedef int_least32_t my_int_least32_t;
1339 my_int_least32_t il32 = INT_LEAST32_MIN;
1340 il32 = INT_LEAST32_MAX;
1341 typedef int_least64_t my_int_least64_t;
1342 my_int_least64_t il64 = INT_LEAST64_MIN;
1343 il64 = INT_LEAST64_MAX;
1344 typedef intmax_t my_intmax_t;
1345 my_intmax_t im = INTMAX_MAX;
1347 typedef intptr_t my_intptr_t;
1348 my_intptr_t ip = INTPTR_MAX;
1350 typedef uint8_t my_uint8_t;
1351 my_uint8_t ui8 = UINT8_MAX;
1353 typedef uint16_t my_uint16_t;
1354 my_uint16_t ui16 = UINT16_MAX;
1356 typedef uint32_t my_uint32_t;
1357 my_uint32_t ui32 = UINT32_MAX;
1359 typedef uint64_t my_uint64_t;
1360 my_uint64_t ui64 = UINT64_MAX;
1362 typedef uint_fast8_t my_uint_fast8_t;
1363 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1364 uif8 = UINT_FAST8_MAX;
1365 typedef uint_fast16_t my_uint_fast16_t;
1366 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1367 uif16 = UINT_FAST16_MAX;
1368 typedef uint_fast32_t my_uint_fast32_t;
1369 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1370 uif32 = UINT_FAST32_MAX;
1371 typedef uint_fast64_t my_uint_fast64_t;
1372 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1373 uif64 = UINT_FAST64_MAX;
1374 typedef uint_least8_t my_uint_least8_t;
1375 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1376 uil8 = UINT_LEAST8_MAX;
1377 typedef uint_least16_t my_uint_least16_t;
1378 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1379 uil16 = UINT_LEAST16_MAX;
1380 typedef uint_least32_t my_uint_least32_t;
1381 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1382 uil32 = UINT_LEAST32_MAX;
1383 typedef uint_least64_t my_uint_least64_t;
1384 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1385 uil64 = UINT_LEAST64_MAX;
1386 typedef uintmax_t my_uintmax_t;
1387 my_uintmax_t uim = UINTMAX_MAX;
1389 typedef uintptr_t my_uintptr_t;
1390 my_uintptr_t uip = UINTPTR_MAX;
1392 ],[glibcxx_cv_c99_stdint_tr1=yes],
1393 [glibcxx_cv_c99_stdint_tr1=no])
1395 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1396 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1397 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1398 [Define if C99 types in <stdint.h> should be imported in
1399 <tr1/cstdint> in namespace std::tr1.])
1402 # Check for the existence of <math.h> functions.
1403 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1404 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1405 AC_TRY_COMPILE([#include <math.h>],
1406 [typedef double_t my_double_t;
1407 typedef float_t my_float_t;
1421 copysignf(0.0f, 0.0f);
1422 copysignl(0.0l, 0.0l);
1439 fmaf(0.0f, 0.0f, 0.0f);
1440 fmal(0.0l, 0.0l, 0.0l);
1483 nextafter(0.0, 0.0);
1484 nextafterf(0.0f, 0.0f);
1485 nextafterl(0.0l, 0.0l);
1486 nexttoward(0.0, 0.0);
1487 nexttowardf(0.0f, 0.0f);
1488 nexttowardl(0.0l, 0.0l);
1489 remainder(0.0, 0.0);
1490 remainderf(0.0f, 0.0f);
1491 remainderl(0.0l, 0.0l);
1492 remquo(0.0, 0.0, 0);
1493 remquo(0.0f, 0.0f, 0);
1494 remquo(0.0l, 0.0l, 0);
1513 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1515 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1516 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1517 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1518 [Define if C99 functions or macros in <math.h> should be imported
1519 in <tr1/cmath> in namespace std::tr1.])
1522 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1523 # sense if the previous check fails, per C99, 7.8/1).
1524 ac_c99_inttypes_tr1=no;
1525 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1526 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1527 AC_TRY_COMPILE([#include <inttypes.h>],
1528 [intmax_t i, numer, denom, base;
1531 intmax_t ret = imaxabs(i);
1532 imaxdiv_t dret = imaxdiv(numer, denom);
1533 ret = strtoimax(s, endptr, base);
1534 uintmax_t uret = strtoumax(s, endptr, base);
1535 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1537 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1538 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1539 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1540 [Define if C99 functions in <inttypes.h> should be imported in
1541 <tr1/cinttypes> in namespace std::tr1.])
1544 # Check for the existence of the <stdbool.h> header.
1545 AC_CHECK_HEADERS(stdbool.h)
1547 CXXFLAGS="$ac_save_CXXFLAGS"
1552 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1553 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1555 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1557 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1558 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1559 if test -r /dev/random && test -r /dev/urandom; then
1560 glibcxx_cv_random_tr1=yes;
1562 glibcxx_cv_random_tr1=no;
1565 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1567 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1568 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1569 [Define if /dev/random and /dev/urandom are available for
1570 the random_device of TR1 (Chapter 5.1).])
1576 dnl Check whether EOF, SEEK_CUR, and SEEK_END have the most common values:
1577 dnl in that case including <cstdio> in some C++ headers can be avoided.
1579 AC_DEFUN([GLIBCXX_CHECK_STDIO_MACROS], [
1581 AC_MSG_CHECKING([for EOF == -1, SEEK_CUR == 1, SEEK_END == 2])
1582 AC_CACHE_VAL(glibcxx_cv_stdio_macros, [
1583 AC_TRY_COMPILE([#include <stdio.h>],
1584 [#if ((EOF != -1) || (SEEK_CUR != 1) || (SEEK_END != 2))
1587 ], [glibcxx_cv_stdio_macros=yes],
1588 [glibcxx_cv_stdio_macros=no])
1590 AC_MSG_RESULT($glibcxx_cv_stdio_macros)
1591 if test x"$glibcxx_cv_stdio_macros" = x"yes"; then
1592 AC_DEFINE(_GLIBCXX_STDIO_MACROS, 1,
1593 [Define if EOF == -1, SEEK_CUR == 1, SEEK_END == 2.])
1599 dnl Check whether macros, etc are present for <system_error>
1601 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1603 m4_pushdef([n_syserr], [1])dnl
1604 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1605 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1606 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1607 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1608 AC_MSG_CHECKING([for syserr])
1609 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1610 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1611 [int i = syserr;])],
1612 [glibcxx_cv_system_error[]n_syserr=yes],
1613 [glibcxx_cv_system_error[]n_syserr=no])
1615 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1616 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1617 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1619 m4_define([n_syserr], m4_incr(n_syserr))dnl
1620 m4_popdef([SYSERR])dnl
1622 m4_popdef([n_syserr])dnl
1626 dnl Check whether C++200x's standard layout types are supported.
1628 AC_DEFUN([GLIBCXX_CHECK_STANDARD_LAYOUT], [
1630 AC_MSG_CHECKING([for ISO C++200x standard layout type support])
1631 AC_CACHE_VAL(ac_standard_layout, [
1634 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1635 ac_save_CXXFLAGS="$CXXFLAGS"
1636 CXXFLAGS='-std=gnu++0x'
1638 AC_TRY_COMPILE([struct b
1642 // Need standard layout relaxation from POD
1644 b& operator=(const b&);
1653 [ac_standard_layout=yes], [ac_standard_layout=no])
1655 CXXFLAGS="$ac_save_CXXFLAGS"
1658 AC_MSG_RESULT($ac_standard_layout)
1659 if test x"$ac_standard_layout" = x"yes"; then
1660 AC_DEFINE(_GLIBCXX_USE_STANDARD_LAYOUT, 1,
1661 [Define if standard layout types are supported in C++200x.])
1666 dnl Check for what type of C headers to use.
1668 dnl --enable-cheaders= [does stuff].
1669 dnl --disable-cheaders [does not do anything, really].
1670 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1671 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1673 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1674 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1675 [construct "C" headers for g++], [permit c|c_std|c_global])
1676 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1678 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1680 # Allow overrides to configure.host here.
1681 if test $enable_cheaders = c_global; then
1685 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1689 AC_SUBST(C_INCLUDE_DIR)
1690 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1691 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1692 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1693 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1694 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1699 dnl Check for which locale library to use. The choice is mapped to
1700 dnl a subdirectory of config/locale.
1702 dnl Default is generic.
1704 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1705 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1706 [use MODEL for target locale package],
1707 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1709 # Deal with gettext issues. Default to not using it (=no) until we detect
1710 # support for it later. Let the user turn it off via --e/d, but let that
1711 # default to on for easier handling.
1714 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1718 # Either a known packaage, or "auto"
1719 if test $enable_clocale = no || test $enable_clocale = yes; then
1722 enable_clocale_flag=$enable_clocale
1724 # Probe for locale model to use if none specified.
1725 # Default to "generic".
1726 if test $enable_clocale_flag = auto; then
1727 case ${target_os} in
1728 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1729 enable_clocale_flag=gnu
1732 enable_clocale_flag=darwin
1735 enable_clocale_flag=generic
1740 # Sanity check model, and test for special functionality.
1741 if test $enable_clocale_flag = gnu; then
1742 AC_EGREP_CPP([_GLIBCXX_ok], [
1743 #include <features.h>
1744 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1747 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1749 if test $enable_clocale = auto; then
1750 # Test for bugs early in glibc-2.2.x series
1752 #define _GNU_SOURCE 1
1755 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1756 extern __typeof(newlocale) __newlocale;
1757 extern __typeof(duplocale) __duplocale;
1758 extern __typeof(strcoll_l) __strcoll_l;
1762 const char __one[] = "Äuglein Augmen";
1763 const char __two[] = "Äuglein";
1768 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1769 loc_dup = __duplocale(loc);
1770 i = __strcoll_l(__one, __two, loc);
1771 j = __strcoll_l(__one, __two, loc_dup);
1775 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1776 [enable_clocale_flag=generic])
1779 # Set it to scream when it hurts.
1780 ac_save_CFLAGS="$CFLAGS"
1781 CFLAGS="-Wimplicit-function-declaration -Werror"
1783 # Use strxfrm_l if available.
1784 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1786 #include <locale.h>],
1787 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1788 AC_DEFINE(HAVE_STRXFRM_L, 1,
1789 [Define if strxfrm_l is available in <string.h>.]),)
1791 # Use strerror_l if available.
1792 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1794 #include <locale.h>],
1795 [__locale_t loc; strerror_l(5, loc);],
1796 AC_DEFINE(HAVE_STRERROR_L, 1,
1797 [Define if strerror_l is available in <string.h>.]),)
1799 CFLAGS="$ac_save_CFLAGS"
1802 # Perhaps use strerror_r if available, and strerror_l isn't.
1803 ac_save_CFLAGS="$CFLAGS"
1804 CFLAGS="-Wimplicit-function-declaration -Werror"
1805 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1807 #include <locale.h>],
1808 [char s[128]; strerror_r(5, s, 128);],
1809 AC_DEFINE(HAVE_STRERROR_R, 1,
1810 [Define if strerror_r is available in <string.h>.]),)
1811 CFLAGS="$ac_save_CFLAGS"
1813 # Set configure bits for specified locale package
1814 AC_MSG_CHECKING([for C locale to use])
1815 case ${enable_clocale_flag} in
1817 AC_MSG_RESULT(generic)
1819 CLOCALE_H=config/locale/generic/c_locale.h
1820 CLOCALE_CC=config/locale/generic/c_locale.cc
1821 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1822 CCOLLATE_CC=config/locale/generic/collate_members.cc
1823 CCTYPE_CC=config/locale/generic/ctype_members.cc
1824 CMESSAGES_H=config/locale/generic/messages_members.h
1825 CMESSAGES_CC=config/locale/generic/messages_members.cc
1826 CMONEY_CC=config/locale/generic/monetary_members.cc
1827 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1828 CTIME_H=config/locale/generic/time_members.h
1829 CTIME_CC=config/locale/generic/time_members.cc
1830 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1833 AC_MSG_RESULT(darwin or freebsd)
1835 CLOCALE_H=config/locale/generic/c_locale.h
1836 CLOCALE_CC=config/locale/generic/c_locale.cc
1837 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1838 CCOLLATE_CC=config/locale/generic/collate_members.cc
1839 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1840 CMESSAGES_H=config/locale/generic/messages_members.h
1841 CMESSAGES_CC=config/locale/generic/messages_members.cc
1842 CMONEY_CC=config/locale/generic/monetary_members.cc
1843 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1844 CTIME_H=config/locale/generic/time_members.h
1845 CTIME_CC=config/locale/generic/time_members.cc
1846 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1852 # Declare intention to use gettext, and add support for specific
1854 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1857 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1858 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1859 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1862 # Export the build objects.
1863 for ling in $ALL_LINGUAS; do \
1864 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1865 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1867 AC_SUBST(glibcxx_MOFILES)
1868 AC_SUBST(glibcxx_POFILES)
1870 CLOCALE_H=config/locale/gnu/c_locale.h
1871 CLOCALE_CC=config/locale/gnu/c_locale.cc
1872 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1873 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1874 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1875 CMESSAGES_H=config/locale/gnu/messages_members.h
1876 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1877 CMONEY_CC=config/locale/gnu/monetary_members.cc
1878 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1879 CTIME_H=config/locale/gnu/time_members.h
1880 CTIME_CC=config/locale/gnu/time_members.cc
1881 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1884 AC_MSG_RESULT(IEEE 1003.1)
1886 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1887 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1888 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1889 CCOLLATE_CC=config/locale/generic/collate_members.cc
1890 CCTYPE_CC=config/locale/generic/ctype_members.cc
1891 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1892 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1893 CMONEY_CC=config/locale/generic/monetary_members.cc
1894 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1895 CTIME_H=config/locale/generic/time_members.h
1896 CTIME_CC=config/locale/generic/time_members.cc
1897 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1901 # This is where the testsuite looks for locale catalogs, using the
1902 # -DLOCALEDIR define during testsuite compilation.
1903 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1904 AC_SUBST(glibcxx_localedir)
1906 # A standalone libintl (e.g., GNU libintl) may be in use.
1907 if test $USE_NLS = yes; then
1908 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1909 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1911 if test $USE_NLS = yes; then
1912 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1913 [Define if NLS translations are to be used.])
1918 AC_SUBST(CMESSAGES_H)
1919 AC_SUBST(CCODECVT_CC)
1920 AC_SUBST(CCOLLATE_CC)
1922 AC_SUBST(CMESSAGES_CC)
1924 AC_SUBST(CNUMERIC_CC)
1927 AC_SUBST(CLOCALE_CC)
1928 AC_SUBST(CLOCALE_INTERNAL_H)
1933 dnl Check for which std::allocator base class to use. The choice is
1934 dnl mapped from a subdirectory of include/ext.
1938 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1939 AC_MSG_CHECKING([for std::allocator base class])
1940 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1941 [use KIND for target std::allocator base],
1942 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1944 # If they didn't use this option switch, or if they specified --enable
1945 # with no specific model, we'll have to look for one. If they
1946 # specified --disable (???), do likewise.
1947 if test $enable_libstdcxx_allocator = no ||
1948 test $enable_libstdcxx_allocator = yes;
1950 enable_libstdcxx_allocator=auto
1953 # Either a known package, or "auto". Auto implies the default choice
1954 # for a particular platform.
1955 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1957 # Probe for host-specific support if no specific model is specified.
1959 if test $enable_libstdcxx_allocator_flag = auto; then
1960 case ${target_os} in
1961 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1962 enable_libstdcxx_allocator_flag=new
1965 enable_libstdcxx_allocator_flag=new
1969 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1972 # Set configure bits for specified locale package
1973 case ${enable_libstdcxx_allocator_flag} in
1975 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1976 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1979 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1980 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1983 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1984 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1987 ALLOCATOR_H=config/allocator/new_allocator_base.h
1988 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1991 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1992 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1996 AC_SUBST(ALLOCATOR_H)
1997 AC_SUBST(ALLOCATOR_NAME)
2002 dnl Check for whether the Boost-derived checks should be turned on.
2004 dnl --enable-concept-checks turns them on.
2005 dnl --disable-concept-checks leaves them off.
2006 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2007 dnl Where DEFAULT is either `yes' or `no'.
2009 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2010 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2011 if test $enable_concept_checks = yes; then
2012 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2013 [Define to use concept checking code from the boost libraries.])
2018 dnl Check for parallel mode pre-requisites, including OpenMP support.
2020 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2022 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2026 # See if configured libgomp/omp.h exists. (libgomp may be in
2027 # noconfigdirs but not explicitly disabled.)
2028 if test -f $glibcxx_builddir/../libgomp/omp.h; then
2029 enable_parallel=yes;
2031 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
2034 AC_MSG_CHECKING([for parallel mode support])
2035 AC_MSG_RESULT([$enable_parallel])
2036 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
2041 dnl Check for which I/O library to use: stdio, or something specific.
2043 dnl Default is stdio.
2045 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2046 AC_MSG_CHECKING([for underlying I/O to use])
2047 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
2048 [use target-specific I/O package], [permit stdio])
2050 # Now that libio has been removed, you can have any color you want as long
2051 # as it's black. This is one big no-op until other packages are added, but
2052 # showing the framework never hurts.
2053 case ${enable_cstdio} in
2055 CSTDIO_H=config/io/c_io_stdio.h
2056 BASIC_FILE_H=config/io/basic_file_stdio.h
2057 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2058 AC_MSG_RESULT(stdio)
2063 AC_SUBST(BASIC_FILE_H)
2064 AC_SUBST(BASIC_FILE_CC)
2069 dnl Check for "unusual" flags to pass to the compiler while building.
2071 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2072 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2073 dnl --disable-cxx-flags passes nothing.
2074 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2075 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2076 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2077 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2078 dnl If "default flags" is an empty string, the effect is the same
2079 dnl as --disable or --enable=no.
2081 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2082 AC_MSG_CHECKING([for extra compiler flags for building])
2083 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2084 [pass compiler FLAGS when building library],
2085 [case "x$enable_cxx_flags" in
2086 xno | x) enable_cxx_flags= ;;
2088 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2091 # Run through flags (either default or command-line) and set anything
2092 # extra (e.g., #defines) that must accompany particular g++ options.
2093 if test -n "$enable_cxx_flags"; then
2094 for f in $enable_cxx_flags; do
2098 *) # and we're trying to pass /what/ exactly?
2099 AC_MSG_ERROR([compiler flags start with a -]) ;;
2104 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2105 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2106 AC_SUBST(EXTRA_CXX_FLAGS)
2111 dnl Check to see if debugging libraries are to be built.
2113 dnl --enable-libstdcxx-debug
2114 dnl builds a separate set of debugging libraries in addition to the
2115 dnl normal (shared, static) libstdc++ binaries.
2117 dnl --disable-libstdcxx-debug
2118 dnl builds only one (non-debug) version of libstdc++.
2120 dnl --enable-libstdcxx-debug-flags=FLAGS
2121 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2123 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2124 dnl Where DEFAULT is either `yes' or `no'.
2126 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2127 AC_MSG_CHECKING([for additional debug build])
2128 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2129 AC_MSG_RESULT($enable_libstdcxx_debug)
2130 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2135 dnl Check for explicit debug flags.
2137 dnl --enable-libstdcxx-debug-flags='-O1'
2138 dnl is a general method for passing flags to be used when
2139 dnl building debug libraries with --enable-debug.
2141 dnl --disable-libstdcxx-debug-flags does nothing.
2142 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2143 dnl If "default flags" is an empty string, the effect is the same
2144 dnl as --disable or --enable=no.
2146 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2147 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2148 [pass compiler FLAGS when building debug library],
2149 [case "x$enable_libstdcxx_debug_flags" in
2150 xno | x) enable_libstdcxx_debug_flags= ;;
2152 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2155 # Option parsed, now set things appropriately
2156 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2157 AC_SUBST(DEBUG_FLAGS)
2159 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2164 dnl Check if the user only wants a freestanding library implementation.
2166 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2167 dnl installing only the headers required by [17.4.1.3] and the language
2168 dnl support library. More than that will be built (to keep the Makefiles
2169 dnl conveniently clean), but not installed.
2172 dnl is_hosted (yes/no)
2175 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2177 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2178 AC_ARG_ENABLE([hosted-libstdcxx],
2179 AC_HELP_STRING([--disable-hosted-libstdcxx],
2180 [only build freestanding C++ runtime support]),,
2183 enable_hosted_libstdcxx=no
2186 enable_hosted_libstdcxx=yes
2189 if test "$enable_hosted_libstdcxx" = no; then
2190 AC_MSG_NOTICE([Only freestanding libraries will be built])
2194 enable_libstdcxx_pch=no
2199 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2200 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2201 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2206 dnl Check for template specializations for the 'long long' type.
2207 dnl The result determines only whether 'long long' I/O is enabled; things
2208 dnl like numeric_limits<> specializations are always available.
2210 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2211 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2212 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2213 dnl Where DEFAULT is either `yes' or `no'.
2215 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2216 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2217 if test $enable_long_long = yes; then
2218 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2219 [Define if code specialized for long long should be used.])
2221 AC_MSG_CHECKING([for enabled long long specializations])
2222 AC_MSG_RESULT([$enable_long_long])
2227 dnl Check for template specializations for the 'wchar_t' type.
2229 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2230 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2231 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2232 dnl Where DEFAULT is either `yes' or `no'.
2234 dnl Necessary support must also be present.
2236 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2237 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2239 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2240 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2241 AC_MSG_CHECKING([for mbstate_t])
2242 AC_TRY_COMPILE([#include <wchar.h>],
2243 [mbstate_t teststate;],
2244 have_mbstate_t=yes, have_mbstate_t=no)
2245 AC_MSG_RESULT($have_mbstate_t)
2246 if test x"$have_mbstate_t" = xyes; then
2247 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2250 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2252 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2254 if test x"$enable_wchar_t" = x"yes"; then
2259 if test x"$ac_has_wchar_h" = xyes &&
2260 test x"$ac_has_wctype_h" = xyes; then
2261 AC_TRY_COMPILE([#include <wchar.h>
2322 ],[],[], [enable_wchar_t=no])
2330 if test x"$enable_wchar_t" = x"yes"; then
2331 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2332 [Define if code specialized for wchar_t should be used.])
2335 AC_MSG_CHECKING([for enabled wchar_t specializations])
2336 AC_MSG_RESULT([$enable_wchar_t])
2341 dnl Check to see if building and using a C++ precompiled header can be done.
2343 dnl --enable-libstdcxx-pch=yes
2344 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2345 dnl may work, after some light-hearted attempts to puzzle out compiler
2346 dnl support, flip bits on in include/Makefile.am
2348 dnl --disable-libstdcxx-pch
2349 dnl turns off attempts to use or build stdc++.h.gch.
2352 dnl glibcxx_PCHFLAGS
2354 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2355 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2356 if test $enable_libstdcxx_pch = yes; then
2357 AC_CACHE_CHECK([for compiler with PCH support],
2358 [glibcxx_cv_prog_CXX_pch],
2359 [ac_save_CXXFLAGS="$CXXFLAGS"
2360 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2363 echo '#include <math.h>' > conftest.h
2364 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2365 -o conftest.h.gch 1>&5 2>&1 &&
2366 echo '#error "pch failed"' > conftest.h &&
2367 echo '#include "conftest.h"' > conftest.cc &&
2368 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2370 glibcxx_cv_prog_CXX_pch=yes
2372 glibcxx_cv_prog_CXX_pch=no
2375 CXXFLAGS=$ac_save_CXXFLAGS
2378 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2381 AC_MSG_CHECKING([for enabled PCH])
2382 AC_MSG_RESULT([$enable_libstdcxx_pch])
2384 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2385 if test $enable_libstdcxx_pch = yes; then
2386 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2390 AC_SUBST(glibcxx_PCHFLAGS)
2395 dnl Check for atomic builtins.
2397 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2399 dnl This checks to see if the host supports the compiler-generated
2400 dnl builtins for atomic operations for various integral sizes. Note, this
2401 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2402 dnl that are used should be checked.
2405 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2406 dnl see: CHECK_SYNC_FETCH_AND_ADD
2409 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2410 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2412 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2415 old_CXXFLAGS="$CXXFLAGS"
2417 # Compile unoptimized.
2420 # Fake what AC_TRY_COMPILE does, without linking as this is
2421 # unnecessary for a builtins test.
2423 cat > conftest.$ac_ext << EOF
2424 [#]line __oline__ "configure"
2427 // NB: _Atomic_word not necessarily int.
2428 typedef int atomic_type;
2431 const atomic_type c3(0);
2432 __sync_fetch_and_add(&c1, c2);
2433 __sync_val_compare_and_swap(&c1, c3, c2);
2434 __sync_lock_test_and_set(&c1, c3);
2435 __sync_lock_release(&c1);
2436 __sync_synchronize();
2441 AC_MSG_CHECKING([for atomic builtins for int])
2442 if AC_TRY_EVAL(ac_compile); then
2443 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2444 enable_atomic_builtinsi=no
2446 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2447 [Define if builtin atomic operations for int are supported on this host.])
2448 enable_atomic_builtinsi=yes
2451 AC_MSG_RESULT($enable_atomic_builtinsi)
2454 cat > conftest.$ac_ext << EOF
2455 [#]line __oline__ "configure"
2458 typedef bool atomic_type;
2461 const atomic_type c3(0);
2462 __sync_fetch_and_add(&c1, c2);
2463 __sync_val_compare_and_swap(&c1, c3, c2);
2464 __sync_lock_test_and_set(&c1, c3);
2465 __sync_lock_release(&c1);
2466 __sync_synchronize();
2471 AC_MSG_CHECKING([for atomic builtins for bool])
2472 if AC_TRY_EVAL(ac_compile); then
2473 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2474 enable_atomic_builtinsb=no
2476 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2477 [Define if builtin atomic operations for bool are supported on this host.])
2478 enable_atomic_builtinsb=yes
2481 AC_MSG_RESULT($enable_atomic_builtinsb)
2484 CXXFLAGS="$old_CXXFLAGS"
2487 # Set atomicity_dir to builtins if either of above tests pass.
2488 if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
2489 atomicity_dir=cpu/generic/atomicity_builtins
2492 # If still generic, set to mutex.
2493 if test $atomicity_dir = "cpu/generic" ; then
2494 atomicity_dir=cpu/generic/atomicity_mutex
2495 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2496 if test $target_thread_file = single; then
2497 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2498 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2500 AC_MSG_WARN([They will be faked using a mutex.])
2501 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2509 dnl Check for exception handling support. If an explicit enable/disable
2510 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2511 dnl target may or may not support call frame exceptions.
2513 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2514 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2515 dnl Neither one forces an attempt at detection.
2518 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2520 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2521 AC_MSG_CHECKING([for exception model to use])
2524 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2525 [force use of builtin_setjmp for exceptions],
2526 [permit yes|no|auto])
2528 if test $enable_sjlj_exceptions = auto; then
2529 # Botheration. Now we've got to detect the exception model. Link tests
2530 # against libgcc.a are problematic since we've not been given proper -L
2531 # bits for single-tree newlib and libgloss.
2533 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2534 cat > conftest.$ac_ext << EOF
2535 [#]line __oline__ "configure"
2544 old_CXXFLAGS="$CXXFLAGS"
2546 if AC_TRY_EVAL(ac_compile); then
2547 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2548 enable_sjlj_exceptions=yes
2549 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2550 enable_sjlj_exceptions=no
2551 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2552 enable_sjlj_exceptions=no
2555 CXXFLAGS="$old_CXXFLAGS"
2559 # This is a tad weird, for hysterical raisins. We have to map
2560 # enable/disable to two different models.
2561 case $enable_sjlj_exceptions in
2563 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2564 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2565 ac_exception_model_name=sjlj
2568 ac_exception_model_name="call frame"
2571 AC_MSG_ERROR([unable to detect exception model])
2575 AC_MSG_RESULT($ac_exception_model_name)
2580 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2582 dnl --enable-visibility enables attempt to use visibility attributes.
2583 dnl --disable-visibility turns off all use of visibility attributes.
2584 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2585 dnl Where DEFAULT is 'yes'.
2587 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2588 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2590 if test x$enable_visibility = xyes ; then
2591 dnl all hail libgfortran
2592 dnl Check whether the target supports hidden visibility.
2593 AC_CACHE_CHECK([whether the target supports hidden visibility],
2594 glibcxx_cv_have_attribute_visibility, [
2595 save_CFLAGS="$CFLAGS"
2596 CFLAGS="$CFLAGS -Werror"
2597 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2598 [], glibcxx_cv_have_attribute_visibility=yes,
2599 glibcxx_cv_have_attribute_visibility=no)
2600 CFLAGS="$save_CFLAGS"])
2601 if test $glibcxx_cv_have_attribute_visibility = no; then
2602 enable_visibility=no
2606 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2607 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2612 dnl Add version tags to symbols in shared library (or not), additionally
2613 dnl marking other symbols as private/local (or not).
2615 dnl --enable-symvers=style adds a version script to the linker call when
2616 dnl creating the shared library. The choice of version script is
2617 dnl controlled by 'style'.
2618 dnl --disable-symvers does not.
2619 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2620 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2621 dnl choose a default style based on linker characteristics. Passing
2622 dnl 'no' disables versioning.
2624 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2626 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2627 [enables symbol versioning of the shared library],
2628 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2630 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2631 # don't know enough about $LD to do tricks...
2632 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2634 # Turn a 'yes' into a suitable default.
2635 if test x$enable_symvers = xyes ; then
2636 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2639 if test $with_gnu_ld = yes ; then
2642 case ${target_os} in
2644 enable_symvers=darwin ;;
2646 enable_symvers=no ;;
2652 # Check to see if 'darwin' or 'darwin-export' can win.
2653 if test x$enable_symvers = xdarwin-export ; then
2654 enable_symvers=darwin
2657 # Check to see if 'gnu' can win.
2658 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2659 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2660 AC_MSG_CHECKING([for shared libgcc])
2661 ac_save_CFLAGS="$CFLAGS"
2663 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2664 CFLAGS="$ac_save_CFLAGS"
2665 if test $glibcxx_shared_libgcc = no; then
2666 cat > conftest.c <<EOF
2667 int main (void) { return 0; }
2670 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2671 -shared -shared-libgcc -o conftest.so \
2672 conftest.c -v 2>&1 >/dev/null \
2673 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2675 rm -f conftest.c conftest.so
2676 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2677 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2678 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2679 CFLAGS="$ac_save_CFLAGS"
2682 AC_MSG_RESULT($glibcxx_shared_libgcc)
2684 # For GNU ld, we need at least this version. The format is described in
2685 # GLIBCXX_CHECK_LINKER_FEATURES above.
2686 glibcxx_min_gnu_ld_version=21400
2688 # If no shared libgcc, can't win.
2689 if test $glibcxx_shared_libgcc != yes; then
2690 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2691 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2692 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2694 elif test $with_gnu_ld != yes ; then
2696 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2697 AC_MSG_WARN([=== you are not using the GNU linker.])
2698 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2700 elif test $glibcxx_ld_is_gold = yes ; then
2701 : All versions of gold support symbol versioning.
2702 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2703 # The right tools, the right setup, but too old. Fallbacks?
2704 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2705 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2706 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2707 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2708 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2713 # Everything parsed; figure out what file to use.
2714 case $enable_symvers in
2716 SYMVER_FILE=config/abi/pre/none.ver
2719 SYMVER_FILE=config/abi/pre/gnu.ver
2720 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2721 [Define to use GNU versioning in the shared library.])
2723 gnu-versioned-namespace)
2724 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2725 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2726 [Define to use GNU namespace versioning in the shared library.])
2729 SYMVER_FILE=config/abi/pre/gnu.ver
2730 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2731 [Define to use darwin versioning in the shared library.])
2735 if test x$enable_symvers != xno ; then
2736 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2737 [Define to use symbol versioning in the shared library.])
2740 AC_SUBST(SYMVER_FILE)
2741 AC_SUBST(port_specific_symbol_files)
2742 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2743 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2744 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2745 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2746 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2748 # Now, set up compatibility support, if any.
2749 # In addition, need this to deal with std::size_t mangling in
2750 # src/compatibility.cc. In a perfect world, could use
2751 # typeid(std::size_t).name()[0] to do direct substitution.
2752 AC_MSG_CHECKING([for size_t as unsigned int])
2753 ac_save_CFLAGS="$CFLAGS"
2755 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2756 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2757 CFLAGS=$ac_save_CFLAGS
2758 if test "$glibcxx_size_t_is_i" = yes; then
2759 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2761 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2763 AC_MSG_CHECKING([for ptrdiff_t as int])
2764 ac_save_CFLAGS="$CFLAGS"
2766 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2767 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2768 CFLAGS=$ac_save_CFLAGS
2769 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2770 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2772 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2777 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2778 dnl We must stage the required headers so that they will be installed
2779 dnl with the library (unlike libgcc, the STL implementation is provided
2780 dnl solely within headers). Since we must not inject random user-space
2781 dnl macro names into user-provided C++ code, we first stage into <file>-in
2782 dnl and process to <file> with an output command. The reason for a two-
2783 dnl stage process here is to correctly handle $srcdir!=$objdir without
2784 dnl having to write complex code (the sed commands to clean the macro
2785 dnl namespace are complex and fragile enough as it is). We must also
2786 dnl add a relative path so that -I- is supported properly.
2789 dnl glibcxx_thread_h
2792 dnl HAVE_GTHR_DEFAULT
2794 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2795 AC_MSG_CHECKING([for thread model used by GCC])
2796 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2797 AC_MSG_RESULT([$target_thread_file])
2799 if test $target_thread_file != single; then
2800 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2801 [Define if gthr-default.h exists
2802 (meaning that threading support is enabled).])
2805 glibcxx_thread_h=gthr-$target_thread_file.h
2807 dnl Check for __GTHREADS define.
2808 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2809 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2815 AC_SUBST(glibcxx_thread_h)
2820 dnl Check if gthread implementation defines the types and functions
2821 dnl required by the c++0x thread library. Conforming gthread
2822 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
2824 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
2828 ac_save_CXXFLAGS="$CXXFLAGS"
2829 CXXFLAGS="$CXXFLAGS -fno-exceptions -I${toplevel_srcdir}/gcc"
2831 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2832 case $target_thread_file in
2834 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
2837 AC_MSG_CHECKING([for gthreads library])
2839 AC_TRY_COMPILE([#include "gthr.h"],
2841 #ifndef __GTHREADS_CXX0X
2844 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
2846 AC_MSG_RESULT([$ac_has_gthreads])
2848 if test x"$ac_has_gthreads" = x"yes"; then
2849 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
2850 [Define if gthreads library is available.])
2853 CXXFLAGS="$ac_save_CXXFLAGS"
2858 # Check whether LC_MESSAGES is available in <locale.h>.
2859 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2861 # This file file be copied and used freely without restrictions. It can
2862 # be used in projects which are not available under the GNU Public License
2863 # but which still want to provide support for the GNU gettext functionality.
2864 # Please note that the actual code is *not* freely available.
2865 AC_DEFUN([AC_LC_MESSAGES], [
2866 AC_CHECK_HEADER(locale.h, [
2867 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2868 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
2869 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2870 if test $ac_cv_val_LC_MESSAGES = yes; then
2871 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2872 [Define if LC_MESSAGES is available in <locale.h>.])
2877 # Macros from the top-level gcc directory.
2878 m4_include([../config/tls.m4])