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="$ac_save_CXXFLAGS"
1204 dnl Check for nanosleep, used in the implementation of 30.2.2
1205 dnl [thread.thread.this] in the current C++0x working draft.
1207 AC_DEFUN([GLIBCXX_CHECK_NANOSLEEP], [
1209 AC_MSG_CHECKING([for nanosleep])
1213 ac_save_CXXFLAGS="$CXXFLAGS"
1214 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1216 ac_has_nanosleep=no;
1217 AC_CHECK_HEADERS(time.h, ac_has_time_h=yes, ac_has_time_h=no)
1218 if test x"$ac_has_time_h" = x"yes"; then
1219 AC_MSG_CHECKING([for nanosleep])
1220 AC_TRY_COMPILE([#include <time.h>],
1221 [timespec ts; nanosleep(&ts, 0);],
1222 [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1224 AC_MSG_RESULT($ac_has_nanosleep)
1227 if test x"$ac_has_nanosleep" = x"yes"; then
1228 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1229 [ Defined if nanosleep is available. ])
1232 CXXFLAGS="$ac_save_CXXFLAGS"
1237 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1238 dnl facilities in Chapter 8, "C compatibility".
1240 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1245 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1246 # undefined and fake C99 facilities may be spuriously enabled.
1247 ac_save_CXXFLAGS="$CXXFLAGS"
1248 CXXFLAGS="$CXXFLAGS -std=c++98"
1250 # Check for the existence of <complex.h> complex math functions used
1252 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1253 ac_c99_complex_tr1=no;
1254 if test x"$ac_has_complex_h" = x"yes"; then
1255 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1256 AC_TRY_COMPILE([#include <complex.h>],
1257 [typedef __complex__ float float_type; float_type tmpf;
1264 typedef __complex__ double double_type; double_type tmpd;
1271 typedef __complex__ long double ld_type; ld_type tmpld;
1278 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1280 AC_MSG_RESULT($ac_c99_complex_tr1)
1281 if test x"$ac_c99_complex_tr1" = x"yes"; then
1282 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1283 [Define if C99 functions in <complex.h> should be used in
1284 <tr1/complex>. Using compiler builtins for these functions
1285 requires corresponding C99 library functions to be present.])
1288 # Check for the existence of <ctype.h> functions.
1289 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1290 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1291 AC_TRY_COMPILE([#include <ctype.h>],
1295 ],[glibcxx_cv_c99_ctype_tr1=yes],
1296 [glibcxx_cv_c99_ctype_tr1=no])
1298 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1299 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1300 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1301 [Define if C99 functions in <ctype.h> should be imported in
1302 <tr1/cctype> in namespace std::tr1.])
1305 # Check for the existence of <fenv.h> functions.
1306 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1308 if test x"$ac_has_fenv_h" = x"yes"; then
1309 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1310 AC_TRY_COMPILE([#include <fenv.h>],
1315 ret = feclearexcept(except);
1316 ret = fegetexceptflag(pflag, except);
1317 ret = feraiseexcept(except);
1318 ret = fesetexceptflag(pflag, except);
1319 ret = fetestexcept(except);
1321 ret = fesetround(mode);
1322 ret = fegetenv(penv);
1323 ret = feholdexcept(penv);
1324 ret = fesetenv(penv);
1325 ret = feupdateenv(penv);
1326 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1328 AC_MSG_RESULT($ac_c99_fenv_tr1)
1329 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1330 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1331 [Define if C99 functions in <fenv.h> should be imported in
1332 <tr1/cfenv> in namespace std::tr1.])
1335 # Check for the existence of <stdint.h> types.
1336 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1337 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1338 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1339 #define __STDC_CONSTANT_MACROS
1340 #include <stdint.h>],
1341 [typedef int8_t my_int8_t;
1342 my_int8_t i8 = INT8_MIN;
1344 typedef int16_t my_int16_t;
1345 my_int16_t i16 = INT16_MIN;
1347 typedef int32_t my_int32_t;
1348 my_int32_t i32 = INT32_MIN;
1350 typedef int64_t my_int64_t;
1351 my_int64_t i64 = INT64_MIN;
1353 typedef int_fast8_t my_int_fast8_t;
1354 my_int_fast8_t if8 = INT_FAST8_MIN;
1355 if8 = INT_FAST8_MAX;
1356 typedef int_fast16_t my_int_fast16_t;
1357 my_int_fast16_t if16 = INT_FAST16_MIN;
1358 if16 = INT_FAST16_MAX;
1359 typedef int_fast32_t my_int_fast32_t;
1360 my_int_fast32_t if32 = INT_FAST32_MIN;
1361 if32 = INT_FAST32_MAX;
1362 typedef int_fast64_t my_int_fast64_t;
1363 my_int_fast64_t if64 = INT_FAST64_MIN;
1364 if64 = INT_FAST64_MAX;
1365 typedef int_least8_t my_int_least8_t;
1366 my_int_least8_t il8 = INT_LEAST8_MIN;
1367 il8 = INT_LEAST8_MAX;
1368 typedef int_least16_t my_int_least16_t;
1369 my_int_least16_t il16 = INT_LEAST16_MIN;
1370 il16 = INT_LEAST16_MAX;
1371 typedef int_least32_t my_int_least32_t;
1372 my_int_least32_t il32 = INT_LEAST32_MIN;
1373 il32 = INT_LEAST32_MAX;
1374 typedef int_least64_t my_int_least64_t;
1375 my_int_least64_t il64 = INT_LEAST64_MIN;
1376 il64 = INT_LEAST64_MAX;
1377 typedef intmax_t my_intmax_t;
1378 my_intmax_t im = INTMAX_MAX;
1380 typedef intptr_t my_intptr_t;
1381 my_intptr_t ip = INTPTR_MAX;
1383 typedef uint8_t my_uint8_t;
1384 my_uint8_t ui8 = UINT8_MAX;
1386 typedef uint16_t my_uint16_t;
1387 my_uint16_t ui16 = UINT16_MAX;
1389 typedef uint32_t my_uint32_t;
1390 my_uint32_t ui32 = UINT32_MAX;
1392 typedef uint64_t my_uint64_t;
1393 my_uint64_t ui64 = UINT64_MAX;
1395 typedef uint_fast8_t my_uint_fast8_t;
1396 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1397 uif8 = UINT_FAST8_MAX;
1398 typedef uint_fast16_t my_uint_fast16_t;
1399 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1400 uif16 = UINT_FAST16_MAX;
1401 typedef uint_fast32_t my_uint_fast32_t;
1402 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1403 uif32 = UINT_FAST32_MAX;
1404 typedef uint_fast64_t my_uint_fast64_t;
1405 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1406 uif64 = UINT_FAST64_MAX;
1407 typedef uint_least8_t my_uint_least8_t;
1408 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1409 uil8 = UINT_LEAST8_MAX;
1410 typedef uint_least16_t my_uint_least16_t;
1411 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1412 uil16 = UINT_LEAST16_MAX;
1413 typedef uint_least32_t my_uint_least32_t;
1414 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1415 uil32 = UINT_LEAST32_MAX;
1416 typedef uint_least64_t my_uint_least64_t;
1417 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1418 uil64 = UINT_LEAST64_MAX;
1419 typedef uintmax_t my_uintmax_t;
1420 my_uintmax_t uim = UINTMAX_MAX;
1422 typedef uintptr_t my_uintptr_t;
1423 my_uintptr_t uip = UINTPTR_MAX;
1425 ],[glibcxx_cv_c99_stdint_tr1=yes],
1426 [glibcxx_cv_c99_stdint_tr1=no])
1428 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1429 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1430 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1431 [Define if C99 types in <stdint.h> should be imported in
1432 <tr1/cstdint> in namespace std::tr1.])
1435 # Check for the existence of <math.h> functions.
1436 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1437 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1438 AC_TRY_COMPILE([#include <math.h>],
1439 [typedef double_t my_double_t;
1440 typedef float_t my_float_t;
1454 copysignf(0.0f, 0.0f);
1455 copysignl(0.0l, 0.0l);
1472 fmaf(0.0f, 0.0f, 0.0f);
1473 fmal(0.0l, 0.0l, 0.0l);
1516 nextafter(0.0, 0.0);
1517 nextafterf(0.0f, 0.0f);
1518 nextafterl(0.0l, 0.0l);
1519 nexttoward(0.0, 0.0);
1520 nexttowardf(0.0f, 0.0f);
1521 nexttowardl(0.0l, 0.0l);
1522 remainder(0.0, 0.0);
1523 remainderf(0.0f, 0.0f);
1524 remainderl(0.0l, 0.0l);
1525 remquo(0.0, 0.0, 0);
1526 remquof(0.0f, 0.0f, 0);
1527 remquol(0.0l, 0.0l, 0);
1546 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1548 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1549 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1550 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1551 [Define if C99 functions or macros in <math.h> should be imported
1552 in <tr1/cmath> in namespace std::tr1.])
1555 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1556 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1557 ac_c99_inttypes_tr1=no;
1558 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1559 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1560 AC_TRY_COMPILE([#include <inttypes.h>],
1561 [intmax_t i, numer, denom, base;
1564 intmax_t ret = imaxabs(i);
1565 imaxdiv_t dret = imaxdiv(numer, denom);
1566 ret = strtoimax(s, endptr, base);
1567 uintmax_t uret = strtoumax(s, endptr, base);
1568 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1570 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1571 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1572 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1573 [Define if C99 functions in <inttypes.h> should be imported in
1574 <tr1/cinttypes> in namespace std::tr1.])
1577 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't
1578 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1579 ac_c99_inttypes_wchar_t_tr1=no;
1580 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1581 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1582 AC_TRY_COMPILE([#include <inttypes.h>],
1586 intmax_t ret = wcstoimax(s, endptr, base);
1587 uintmax_t uret = wcstoumax(s, endptr, base);
1588 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1589 [ac_c99_inttypes_wchar_t_tr1=no])
1591 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1592 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1593 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1594 [Define if wchar_t C99 functions in <inttypes.h> should be
1595 imported in <tr1/cinttypes> in namespace std::tr1.])
1598 # Check for the existence of the <stdbool.h> header.
1599 AC_CHECK_HEADERS(stdbool.h)
1601 CXXFLAGS="$ac_save_CXXFLAGS"
1606 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1607 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1609 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1611 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1612 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1613 if test -r /dev/random && test -r /dev/urandom; then
1614 glibcxx_cv_random_tr1=yes;
1616 glibcxx_cv_random_tr1=no;
1619 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1621 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1622 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1623 [Define if /dev/random and /dev/urandom are available for
1624 the random_device of TR1 (Chapter 5.1).])
1630 dnl Check whether EOF, SEEK_CUR, and SEEK_END have the most common values:
1631 dnl in that case including <cstdio> in some C++ headers can be avoided.
1633 AC_DEFUN([GLIBCXX_CHECK_STDIO_MACROS], [
1635 AC_MSG_CHECKING([for EOF == -1, SEEK_CUR == 1, SEEK_END == 2])
1636 AC_CACHE_VAL(glibcxx_cv_stdio_macros, [
1637 AC_TRY_COMPILE([#include <stdio.h>],
1638 [#if ((EOF != -1) || (SEEK_CUR != 1) || (SEEK_END != 2))
1641 ], [glibcxx_cv_stdio_macros=yes],
1642 [glibcxx_cv_stdio_macros=no])
1644 AC_MSG_RESULT($glibcxx_cv_stdio_macros)
1645 if test x"$glibcxx_cv_stdio_macros" = x"yes"; then
1646 AC_DEFINE(_GLIBCXX_STDIO_MACROS, 1,
1647 [Define if EOF == -1, SEEK_CUR == 1, SEEK_END == 2.])
1653 dnl Check whether macros, etc are present for <system_error>
1655 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1657 m4_pushdef([n_syserr], [1])dnl
1658 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1659 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1660 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1661 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1662 AC_MSG_CHECKING([for syserr])
1663 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1664 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1665 [int i = syserr;])],
1666 [glibcxx_cv_system_error[]n_syserr=yes],
1667 [glibcxx_cv_system_error[]n_syserr=no])
1669 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1670 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1671 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1673 m4_define([n_syserr], m4_incr(n_syserr))dnl
1674 m4_popdef([SYSERR])dnl
1676 m4_popdef([n_syserr])dnl
1680 dnl Check for what type of C headers to use.
1682 dnl --enable-cheaders= [does stuff].
1683 dnl --disable-cheaders [does not do anything, really].
1684 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1685 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1687 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1688 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1689 [construct "C" headers for g++], [permit c|c_std|c_global])
1690 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1692 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1694 # Allow overrides to configure.host here.
1695 if test $enable_cheaders = c_global; then
1699 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1703 AC_SUBST(C_INCLUDE_DIR)
1704 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1705 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1706 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1707 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1708 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1713 dnl Check for which locale library to use. The choice is mapped to
1714 dnl a subdirectory of config/locale.
1716 dnl Default is generic.
1718 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1719 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1720 [use MODEL for target locale package],
1721 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1723 # Deal with gettext issues. Default to not using it (=no) until we detect
1724 # support for it later. Let the user turn it off via --e/d, but let that
1725 # default to on for easier handling.
1728 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1732 # Either a known packaage, or "auto"
1733 if test $enable_clocale = no || test $enable_clocale = yes; then
1736 enable_clocale_flag=$enable_clocale
1738 # Probe for locale model to use if none specified.
1739 # Default to "generic".
1740 if test $enable_clocale_flag = auto; then
1741 case ${target_os} in
1742 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1743 enable_clocale_flag=gnu
1746 enable_clocale_flag=darwin
1749 enable_clocale_flag=generic
1754 # Sanity check model, and test for special functionality.
1755 if test $enable_clocale_flag = gnu; then
1756 AC_EGREP_CPP([_GLIBCXX_ok], [
1757 #include <features.h>
1758 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1761 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1763 if test $enable_clocale = auto; then
1764 # Test for bugs early in glibc-2.2.x series
1766 #define _GNU_SOURCE 1
1769 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1770 extern __typeof(newlocale) __newlocale;
1771 extern __typeof(duplocale) __duplocale;
1772 extern __typeof(strcoll_l) __strcoll_l;
1776 const char __one[] = "Äuglein Augmen";
1777 const char __two[] = "Äuglein";
1782 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1783 loc_dup = __duplocale(loc);
1784 i = __strcoll_l(__one, __two, loc);
1785 j = __strcoll_l(__one, __two, loc_dup);
1789 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1790 [enable_clocale_flag=generic])
1793 # Set it to scream when it hurts.
1794 ac_save_CFLAGS="$CFLAGS"
1795 CFLAGS="-Wimplicit-function-declaration -Werror"
1797 # Use strxfrm_l if available.
1798 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1800 #include <locale.h>],
1801 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1802 AC_DEFINE(HAVE_STRXFRM_L, 1,
1803 [Define if strxfrm_l is available in <string.h>.]),)
1805 # Use strerror_l if available.
1806 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1808 #include <locale.h>],
1809 [__locale_t loc; strerror_l(5, loc);],
1810 AC_DEFINE(HAVE_STRERROR_L, 1,
1811 [Define if strerror_l is available in <string.h>.]),)
1813 CFLAGS="$ac_save_CFLAGS"
1816 # Perhaps use strerror_r if available, and strerror_l isn't.
1817 ac_save_CFLAGS="$CFLAGS"
1818 CFLAGS="-Wimplicit-function-declaration -Werror"
1819 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1821 #include <locale.h>],
1822 [char s[128]; strerror_r(5, s, 128);],
1823 AC_DEFINE(HAVE_STRERROR_R, 1,
1824 [Define if strerror_r is available in <string.h>.]),)
1825 CFLAGS="$ac_save_CFLAGS"
1827 # Set configure bits for specified locale package
1828 AC_MSG_CHECKING([for C locale to use])
1829 case ${enable_clocale_flag} in
1831 AC_MSG_RESULT(generic)
1833 CLOCALE_H=config/locale/generic/c_locale.h
1834 CLOCALE_CC=config/locale/generic/c_locale.cc
1835 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1836 CCOLLATE_CC=config/locale/generic/collate_members.cc
1837 CCTYPE_CC=config/locale/generic/ctype_members.cc
1838 CMESSAGES_H=config/locale/generic/messages_members.h
1839 CMESSAGES_CC=config/locale/generic/messages_members.cc
1840 CMONEY_CC=config/locale/generic/monetary_members.cc
1841 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1842 CTIME_H=config/locale/generic/time_members.h
1843 CTIME_CC=config/locale/generic/time_members.cc
1844 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1847 AC_MSG_RESULT(darwin or freebsd)
1849 CLOCALE_H=config/locale/generic/c_locale.h
1850 CLOCALE_CC=config/locale/generic/c_locale.cc
1851 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1852 CCOLLATE_CC=config/locale/generic/collate_members.cc
1853 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1854 CMESSAGES_H=config/locale/generic/messages_members.h
1855 CMESSAGES_CC=config/locale/generic/messages_members.cc
1856 CMONEY_CC=config/locale/generic/monetary_members.cc
1857 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1858 CTIME_H=config/locale/generic/time_members.h
1859 CTIME_CC=config/locale/generic/time_members.cc
1860 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1866 # Declare intention to use gettext, and add support for specific
1868 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1871 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1872 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1873 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1876 # Export the build objects.
1877 for ling in $ALL_LINGUAS; do \
1878 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1879 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1881 AC_SUBST(glibcxx_MOFILES)
1882 AC_SUBST(glibcxx_POFILES)
1884 CLOCALE_H=config/locale/gnu/c_locale.h
1885 CLOCALE_CC=config/locale/gnu/c_locale.cc
1886 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1887 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1888 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1889 CMESSAGES_H=config/locale/gnu/messages_members.h
1890 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1891 CMONEY_CC=config/locale/gnu/monetary_members.cc
1892 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1893 CTIME_H=config/locale/gnu/time_members.h
1894 CTIME_CC=config/locale/gnu/time_members.cc
1895 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1898 AC_MSG_RESULT(IEEE 1003.1)
1900 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1901 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1902 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1903 CCOLLATE_CC=config/locale/generic/collate_members.cc
1904 CCTYPE_CC=config/locale/generic/ctype_members.cc
1905 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1906 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1907 CMONEY_CC=config/locale/generic/monetary_members.cc
1908 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1909 CTIME_H=config/locale/generic/time_members.h
1910 CTIME_CC=config/locale/generic/time_members.cc
1911 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1915 # This is where the testsuite looks for locale catalogs, using the
1916 # -DLOCALEDIR define during testsuite compilation.
1917 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1918 AC_SUBST(glibcxx_localedir)
1920 # A standalone libintl (e.g., GNU libintl) may be in use.
1921 if test $USE_NLS = yes; then
1922 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1923 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1925 if test $USE_NLS = yes; then
1926 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1927 [Define if NLS translations are to be used.])
1932 AC_SUBST(CMESSAGES_H)
1933 AC_SUBST(CCODECVT_CC)
1934 AC_SUBST(CCOLLATE_CC)
1936 AC_SUBST(CMESSAGES_CC)
1938 AC_SUBST(CNUMERIC_CC)
1941 AC_SUBST(CLOCALE_CC)
1942 AC_SUBST(CLOCALE_INTERNAL_H)
1947 dnl Check for which std::allocator base class to use. The choice is
1948 dnl mapped from a subdirectory of include/ext.
1952 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1953 AC_MSG_CHECKING([for std::allocator base class])
1954 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1955 [use KIND for target std::allocator base],
1956 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1958 # If they didn't use this option switch, or if they specified --enable
1959 # with no specific model, we'll have to look for one. If they
1960 # specified --disable (???), do likewise.
1961 if test $enable_libstdcxx_allocator = no ||
1962 test $enable_libstdcxx_allocator = yes;
1964 enable_libstdcxx_allocator=auto
1967 # Either a known package, or "auto". Auto implies the default choice
1968 # for a particular platform.
1969 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1971 # Probe for host-specific support if no specific model is specified.
1973 if test $enable_libstdcxx_allocator_flag = auto; then
1974 case ${target_os} in
1975 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1976 enable_libstdcxx_allocator_flag=new
1979 enable_libstdcxx_allocator_flag=new
1983 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1986 # Set configure bits for specified locale package
1987 case ${enable_libstdcxx_allocator_flag} in
1989 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1990 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1993 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1994 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1997 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1998 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2001 ALLOCATOR_H=config/allocator/new_allocator_base.h
2002 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2005 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2006 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2010 AC_SUBST(ALLOCATOR_H)
2011 AC_SUBST(ALLOCATOR_NAME)
2016 dnl Check for whether the Boost-derived checks should be turned on.
2018 dnl --enable-concept-checks turns them on.
2019 dnl --disable-concept-checks leaves them off.
2020 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2021 dnl Where DEFAULT is either `yes' or `no'.
2023 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2024 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2025 if test $enable_concept_checks = yes; then
2026 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2027 [Define to use concept checking code from the boost libraries.])
2032 dnl Check for parallel mode pre-requisites, including OpenMP support.
2034 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2036 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2040 # See if configured libgomp/omp.h exists. (libgomp may be in
2041 # noconfigdirs but not explicitly disabled.)
2042 if test -f $glibcxx_builddir/../libgomp/omp.h; then
2043 enable_parallel=yes;
2045 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
2048 AC_MSG_CHECKING([for parallel mode support])
2049 AC_MSG_RESULT([$enable_parallel])
2050 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
2055 dnl Check for which I/O library to use: stdio, or something specific.
2057 dnl Default is stdio.
2059 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2060 AC_MSG_CHECKING([for underlying I/O to use])
2061 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
2062 [use target-specific I/O package], [permit stdio])
2064 # Now that libio has been removed, you can have any color you want as long
2065 # as it's black. This is one big no-op until other packages are added, but
2066 # showing the framework never hurts.
2067 case ${enable_cstdio} in
2069 CSTDIO_H=config/io/c_io_stdio.h
2070 BASIC_FILE_H=config/io/basic_file_stdio.h
2071 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2072 AC_MSG_RESULT(stdio)
2077 AC_SUBST(BASIC_FILE_H)
2078 AC_SUBST(BASIC_FILE_CC)
2083 dnl Check for "unusual" flags to pass to the compiler while building.
2085 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2086 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2087 dnl --disable-cxx-flags passes nothing.
2088 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2089 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2090 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2091 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2092 dnl If "default flags" is an empty string, the effect is the same
2093 dnl as --disable or --enable=no.
2095 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2096 AC_MSG_CHECKING([for extra compiler flags for building])
2097 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2098 [pass compiler FLAGS when building library],
2099 [case "x$enable_cxx_flags" in
2100 xno | x) enable_cxx_flags= ;;
2102 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2105 # Run through flags (either default or command-line) and set anything
2106 # extra (e.g., #defines) that must accompany particular g++ options.
2107 if test -n "$enable_cxx_flags"; then
2108 for f in $enable_cxx_flags; do
2112 *) # and we're trying to pass /what/ exactly?
2113 AC_MSG_ERROR([compiler flags start with a -]) ;;
2118 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2119 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2120 AC_SUBST(EXTRA_CXX_FLAGS)
2125 dnl Check to see if debugging libraries are to be built.
2127 dnl --enable-libstdcxx-debug
2128 dnl builds a separate set of debugging libraries in addition to the
2129 dnl normal (shared, static) libstdc++ binaries.
2131 dnl --disable-libstdcxx-debug
2132 dnl builds only one (non-debug) version of libstdc++.
2134 dnl --enable-libstdcxx-debug-flags=FLAGS
2135 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2137 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2138 dnl Where DEFAULT is either `yes' or `no'.
2140 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2141 AC_MSG_CHECKING([for additional debug build])
2142 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2143 AC_MSG_RESULT($enable_libstdcxx_debug)
2144 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2149 dnl Check for explicit debug flags.
2151 dnl --enable-libstdcxx-debug-flags='-O1'
2152 dnl is a general method for passing flags to be used when
2153 dnl building debug libraries with --enable-debug.
2155 dnl --disable-libstdcxx-debug-flags does nothing.
2156 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2157 dnl If "default flags" is an empty string, the effect is the same
2158 dnl as --disable or --enable=no.
2160 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2161 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2162 [pass compiler FLAGS when building debug library],
2163 [case "x$enable_libstdcxx_debug_flags" in
2164 xno | x) enable_libstdcxx_debug_flags= ;;
2166 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2169 # Option parsed, now set things appropriately
2170 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2171 AC_SUBST(DEBUG_FLAGS)
2173 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2178 dnl Check if the user only wants a freestanding library implementation.
2180 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2181 dnl installing only the headers required by [17.4.1.3] and the language
2182 dnl support library. More than that will be built (to keep the Makefiles
2183 dnl conveniently clean), but not installed.
2186 dnl is_hosted (yes/no)
2189 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2191 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2192 AC_ARG_ENABLE([hosted-libstdcxx],
2193 AC_HELP_STRING([--disable-hosted-libstdcxx],
2194 [only build freestanding C++ runtime support]),,
2197 enable_hosted_libstdcxx=no
2200 enable_hosted_libstdcxx=yes
2203 if test "$enable_hosted_libstdcxx" = no; then
2204 AC_MSG_NOTICE([Only freestanding libraries will be built])
2208 enable_libstdcxx_pch=no
2213 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2214 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2215 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2220 dnl Check for template specializations for the 'long long' type.
2221 dnl The result determines only whether 'long long' I/O is enabled; things
2222 dnl like numeric_limits<> specializations are always available.
2224 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2225 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2226 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2227 dnl Where DEFAULT is either `yes' or `no'.
2229 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2230 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2231 if test $enable_long_long = yes; then
2232 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2233 [Define if code specialized for long long should be used.])
2235 AC_MSG_CHECKING([for enabled long long specializations])
2236 AC_MSG_RESULT([$enable_long_long])
2241 dnl Check for template specializations for the 'wchar_t' type.
2243 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2244 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2245 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2246 dnl Where DEFAULT is either `yes' or `no'.
2248 dnl Necessary support must also be present.
2250 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2251 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2253 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2254 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2255 AC_MSG_CHECKING([for mbstate_t])
2256 AC_TRY_COMPILE([#include <wchar.h>],
2257 [mbstate_t teststate;],
2258 have_mbstate_t=yes, have_mbstate_t=no)
2259 AC_MSG_RESULT($have_mbstate_t)
2260 if test x"$have_mbstate_t" = xyes; then
2261 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2264 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2266 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2268 if test x"$enable_wchar_t" = x"yes"; then
2273 if test x"$ac_has_wchar_h" = xyes &&
2274 test x"$ac_has_wctype_h" = xyes; then
2275 AC_TRY_COMPILE([#include <wchar.h>
2336 ],[],[], [enable_wchar_t=no])
2344 if test x"$enable_wchar_t" = x"yes"; then
2345 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2346 [Define if code specialized for wchar_t should be used.])
2349 AC_MSG_CHECKING([for enabled wchar_t specializations])
2350 AC_MSG_RESULT([$enable_wchar_t])
2355 dnl Check to see if building and using a C++ precompiled header can be done.
2357 dnl --enable-libstdcxx-pch=yes
2358 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2359 dnl may work, after some light-hearted attempts to puzzle out compiler
2360 dnl support, flip bits on in include/Makefile.am
2362 dnl --disable-libstdcxx-pch
2363 dnl turns off attempts to use or build stdc++.h.gch.
2366 dnl glibcxx_PCHFLAGS
2368 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2369 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2370 if test $enable_libstdcxx_pch = yes; then
2371 AC_CACHE_CHECK([for compiler with PCH support],
2372 [glibcxx_cv_prog_CXX_pch],
2373 [ac_save_CXXFLAGS="$CXXFLAGS"
2374 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2377 echo '#include <math.h>' > conftest.h
2378 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2379 -o conftest.h.gch 1>&5 2>&1 &&
2380 echo '#error "pch failed"' > conftest.h &&
2381 echo '#include "conftest.h"' > conftest.cc &&
2382 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2384 glibcxx_cv_prog_CXX_pch=yes
2386 glibcxx_cv_prog_CXX_pch=no
2389 CXXFLAGS=$ac_save_CXXFLAGS
2392 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2395 AC_MSG_CHECKING([for enabled PCH])
2396 AC_MSG_RESULT([$enable_libstdcxx_pch])
2398 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2399 if test $enable_libstdcxx_pch = yes; then
2400 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2404 AC_SUBST(glibcxx_PCHFLAGS)
2409 dnl Check for atomic builtins.
2411 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2413 dnl This checks to see if the host supports the compiler-generated
2414 dnl builtins for atomic operations for various integral sizes. Note, this
2415 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2416 dnl that are used should be checked.
2419 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2420 dnl see: CHECK_SYNC_FETCH_AND_ADD
2423 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2424 dnl _GLIBCXX_ATOMIC_BUILTINS_2
2425 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2426 dnl _GLIBCXX_ATOMIC_BUILTINS_8
2428 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2431 old_CXXFLAGS="$CXXFLAGS"
2433 # Compile unoptimized.
2436 # Fake what AC_TRY_COMPILE does, without linking as this is
2437 # unnecessary for a builtins test.
2439 cat > conftest.$ac_ext << EOF
2440 [#]line __oline__ "configure"
2443 typedef bool atomic_type;
2446 const atomic_type c3(0);
2447 __sync_fetch_and_add(&c1, c2);
2448 __sync_val_compare_and_swap(&c1, c3, c2);
2449 __sync_lock_test_and_set(&c1, c3);
2450 __sync_lock_release(&c1);
2451 __sync_synchronize();
2456 AC_MSG_CHECKING([for atomic builtins for bool])
2457 if AC_TRY_EVAL(ac_compile); then
2458 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2459 enable_atomic_builtinsb=no
2461 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2462 [Define if builtin atomic operations for bool are supported on this host.])
2463 enable_atomic_builtinsb=yes
2466 AC_MSG_RESULT($enable_atomic_builtinsb)
2469 cat > conftest.$ac_ext << EOF
2470 [#]line __oline__ "configure"
2473 typedef short atomic_type;
2476 const atomic_type c3(0);
2477 __sync_fetch_and_add(&c1, c2);
2478 __sync_val_compare_and_swap(&c1, c3, c2);
2479 __sync_lock_test_and_set(&c1, c3);
2480 __sync_lock_release(&c1);
2481 __sync_synchronize();
2486 AC_MSG_CHECKING([for atomic builtins for short])
2487 if AC_TRY_EVAL(ac_compile); then
2488 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2489 enable_atomic_builtinss=no
2491 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
2492 [Define if builtin atomic operations for short are supported on this host.])
2493 enable_atomic_builtinss=yes
2496 AC_MSG_RESULT($enable_atomic_builtinss)
2499 cat > conftest.$ac_ext << EOF
2500 [#]line __oline__ "configure"
2503 // NB: _Atomic_word not necessarily int.
2504 typedef int atomic_type;
2507 const atomic_type c3(0);
2508 __sync_fetch_and_add(&c1, c2);
2509 __sync_val_compare_and_swap(&c1, c3, c2);
2510 __sync_lock_test_and_set(&c1, c3);
2511 __sync_lock_release(&c1);
2512 __sync_synchronize();
2517 AC_MSG_CHECKING([for atomic builtins for int])
2518 if AC_TRY_EVAL(ac_compile); then
2519 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2520 enable_atomic_builtinsi=no
2522 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2523 [Define if builtin atomic operations for int are supported on this host.])
2524 enable_atomic_builtinsi=yes
2527 AC_MSG_RESULT($enable_atomic_builtinsi)
2530 cat > conftest.$ac_ext << EOF
2531 [#]line __oline__ "configure"
2534 typedef long long atomic_type;
2537 const atomic_type c3(0);
2538 __sync_fetch_and_add(&c1, c2);
2539 __sync_val_compare_and_swap(&c1, c3, c2);
2540 __sync_lock_test_and_set(&c1, c3);
2541 __sync_lock_release(&c1);
2542 __sync_synchronize();
2547 AC_MSG_CHECKING([for atomic builtins for long long])
2548 if AC_TRY_EVAL(ac_compile); then
2549 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2550 enable_atomic_builtinsll=no
2552 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
2553 [Define if builtin atomic operations for long long are supported on this host.])
2554 enable_atomic_builtinsll=yes
2557 AC_MSG_RESULT($enable_atomic_builtinsll)
2561 CXXFLAGS="$old_CXXFLAGS"
2564 # Set atomicity_dir to builtins if either of above tests pass.
2565 if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
2566 atomicity_dir=cpu/generic/atomicity_builtins
2569 # If still generic, set to mutex.
2570 if test $atomicity_dir = "cpu/generic" ; then
2571 atomicity_dir=cpu/generic/atomicity_mutex
2572 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2573 if test $target_thread_file = single; then
2574 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2575 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2577 AC_MSG_WARN([They will be faked using a mutex.])
2578 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2586 dnl Check for exception handling support. If an explicit enable/disable
2587 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2588 dnl target may or may not support call frame exceptions.
2590 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2591 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2592 dnl Neither one forces an attempt at detection.
2595 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2597 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2598 AC_MSG_CHECKING([for exception model to use])
2601 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2602 [force use of builtin_setjmp for exceptions],
2603 [permit yes|no|auto])
2605 if test $enable_sjlj_exceptions = auto; then
2606 # Botheration. Now we've got to detect the exception model. Link tests
2607 # against libgcc.a are problematic since we've not been given proper -L
2608 # bits for single-tree newlib and libgloss.
2610 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2611 cat > conftest.$ac_ext << EOF
2612 [#]line __oline__ "configure"
2621 old_CXXFLAGS="$CXXFLAGS"
2623 if AC_TRY_EVAL(ac_compile); then
2624 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2625 enable_sjlj_exceptions=yes
2626 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2627 enable_sjlj_exceptions=no
2628 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2629 enable_sjlj_exceptions=no
2632 CXXFLAGS="$old_CXXFLAGS"
2636 # This is a tad weird, for hysterical raisins. We have to map
2637 # enable/disable to two different models.
2638 case $enable_sjlj_exceptions in
2640 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2641 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2642 ac_exception_model_name=sjlj
2645 ac_exception_model_name="call frame"
2648 AC_MSG_ERROR([unable to detect exception model])
2652 AC_MSG_RESULT($ac_exception_model_name)
2657 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2659 dnl --enable-visibility enables attempt to use visibility attributes.
2660 dnl --disable-visibility turns off all use of visibility attributes.
2661 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2662 dnl Where DEFAULT is 'yes'.
2664 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2665 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2667 if test x$enable_visibility = xyes ; then
2668 dnl all hail libgfortran
2669 dnl Check whether the target supports hidden visibility.
2670 AC_CACHE_CHECK([whether the target supports hidden visibility],
2671 glibcxx_cv_have_attribute_visibility, [
2672 save_CFLAGS="$CFLAGS"
2673 CFLAGS="$CFLAGS -Werror"
2674 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2675 [], glibcxx_cv_have_attribute_visibility=yes,
2676 glibcxx_cv_have_attribute_visibility=no)
2677 CFLAGS="$save_CFLAGS"])
2678 if test $glibcxx_cv_have_attribute_visibility = no; then
2679 enable_visibility=no
2683 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2684 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2689 dnl Add version tags to symbols in shared library (or not), additionally
2690 dnl marking other symbols as private/local (or not).
2692 dnl --enable-symvers=style adds a version script to the linker call when
2693 dnl creating the shared library. The choice of version script is
2694 dnl controlled by 'style'.
2695 dnl --disable-symvers does not.
2696 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2697 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2698 dnl choose a default style based on linker characteristics. Passing
2699 dnl 'no' disables versioning.
2701 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2703 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2704 [enables symbol versioning of the shared library],
2705 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2707 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2708 # don't know enough about $LD to do tricks...
2709 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2711 # Turn a 'yes' into a suitable default.
2712 if test x$enable_symvers = xyes ; then
2713 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2716 if test $with_gnu_ld = yes ; then
2717 case ${target_os} in
2718 cygwin* | pe | mingw32*)
2719 enable_symvers=no ;;
2721 enable_symvers=gnu ;;
2724 case ${target_os} in
2726 enable_symvers=darwin ;;
2728 enable_symvers=no ;;
2734 # Check to see if 'darwin' or 'darwin-export' can win.
2735 if test x$enable_symvers = xdarwin-export ; then
2736 enable_symvers=darwin
2739 # Check to see if 'gnu' can win.
2740 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2741 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2742 AC_MSG_CHECKING([for shared libgcc])
2743 ac_save_CFLAGS="$CFLAGS"
2745 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2746 CFLAGS="$ac_save_CFLAGS"
2747 if test $glibcxx_shared_libgcc = no; then
2748 cat > conftest.c <<EOF
2749 int main (void) { return 0; }
2752 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2753 -shared -shared-libgcc -o conftest.so \
2754 conftest.c -v 2>&1 >/dev/null \
2755 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2757 rm -f conftest.c conftest.so
2758 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2759 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2760 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2761 CFLAGS="$ac_save_CFLAGS"
2764 AC_MSG_RESULT($glibcxx_shared_libgcc)
2766 # For GNU ld, we need at least this version. The format is described in
2767 # GLIBCXX_CHECK_LINKER_FEATURES above.
2768 glibcxx_min_gnu_ld_version=21400
2770 # If no shared libgcc, can't win.
2771 if test $glibcxx_shared_libgcc != yes; then
2772 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2773 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2774 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2776 elif test $with_gnu_ld != yes ; then
2778 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2779 AC_MSG_WARN([=== you are not using the GNU linker.])
2780 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2782 elif test $glibcxx_ld_is_gold = yes ; then
2783 : All versions of gold support symbol versioning.
2784 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2785 # The right tools, the right setup, but too old. Fallbacks?
2786 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2787 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2788 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2789 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2790 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2795 # Everything parsed; figure out what file to use.
2796 case $enable_symvers in
2798 SYMVER_FILE=config/abi/pre/none.ver
2801 SYMVER_FILE=config/abi/pre/gnu.ver
2802 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2803 [Define to use GNU versioning in the shared library.])
2805 gnu-versioned-namespace)
2806 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2807 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2808 [Define to use GNU namespace versioning in the shared library.])
2811 SYMVER_FILE=config/abi/pre/gnu.ver
2812 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2813 [Define to use darwin versioning in the shared library.])
2817 if test x$enable_symvers != xno ; then
2818 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2819 [Define to use symbol versioning in the shared library.])
2822 AC_SUBST(SYMVER_FILE)
2823 AC_SUBST(port_specific_symbol_files)
2824 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2825 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2826 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2827 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2828 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2830 # Now, set up compatibility support, if any.
2831 # In addition, need this to deal with std::size_t mangling in
2832 # src/compatibility.cc. In a perfect world, could use
2833 # typeid(std::size_t).name()[0] to do direct substitution.
2834 AC_MSG_CHECKING([for size_t as unsigned int])
2835 ac_save_CFLAGS="$CFLAGS"
2837 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2838 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2839 CFLAGS=$ac_save_CFLAGS
2840 if test "$glibcxx_size_t_is_i" = yes; then
2841 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2843 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2845 AC_MSG_CHECKING([for ptrdiff_t as int])
2846 ac_save_CFLAGS="$CFLAGS"
2848 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2849 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2850 CFLAGS=$ac_save_CFLAGS
2851 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2852 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2854 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2859 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2860 dnl We must stage the required headers so that they will be installed
2861 dnl with the library (unlike libgcc, the STL implementation is provided
2862 dnl solely within headers). Since we must not inject random user-space
2863 dnl macro names into user-provided C++ code, we first stage into <file>-in
2864 dnl and process to <file> with an output command. The reason for a two-
2865 dnl stage process here is to correctly handle $srcdir!=$objdir without
2866 dnl having to write complex code (the sed commands to clean the macro
2867 dnl namespace are complex and fragile enough as it is). We must also
2868 dnl add a relative path so that -I- is supported properly.
2871 dnl glibcxx_thread_h
2874 dnl HAVE_GTHR_DEFAULT
2876 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2877 AC_MSG_CHECKING([for thread model used by GCC])
2878 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2879 AC_MSG_RESULT([$target_thread_file])
2881 if test $target_thread_file != single; then
2882 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2883 [Define if gthr-default.h exists
2884 (meaning that threading support is enabled).])
2887 glibcxx_thread_h=gthr-$target_thread_file.h
2889 dnl Check for __GTHREADS define.
2890 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2891 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2897 AC_SUBST(glibcxx_thread_h)
2902 dnl Check if gthread implementation defines the types and functions
2903 dnl required by the c++0x thread library. Conforming gthread
2904 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
2906 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
2910 ac_save_CXXFLAGS="$CXXFLAGS"
2911 CXXFLAGS="$CXXFLAGS -fno-exceptions -I${toplevel_srcdir}/gcc"
2913 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2914 case $target_thread_file in
2916 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
2919 AC_MSG_CHECKING([for gthreads library])
2921 AC_TRY_COMPILE([#include "gthr.h"],
2923 #ifndef __GTHREADS_CXX0X
2927 // In case of POSIX threads check _POSIX_TIMEOUTS too.
2928 #if (defined(_PTHREADS) \
2929 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
2932 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
2934 AC_MSG_RESULT([$ac_has_gthreads])
2936 if test x"$ac_has_gthreads" = x"yes"; then
2937 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
2938 [Define if gthreads library is available.])
2941 CXXFLAGS="$ac_save_CXXFLAGS"
2946 # Check whether LC_MESSAGES is available in <locale.h>.
2947 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2949 # This file file be copied and used freely without restrictions. It can
2950 # be used in projects which are not available under the GNU Public License
2951 # but which still want to provide support for the GNU gettext functionality.
2952 # Please note that the actual code is *not* freely available.
2953 AC_DEFUN([AC_LC_MESSAGES], [
2954 AC_CHECK_HEADER(locale.h, [
2955 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2956 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
2957 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2958 if test $ac_cv_val_LC_MESSAGES = yes; then
2959 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2960 [Define if LC_MESSAGES is available in <locale.h>.])
2965 # Macros from the top-level gcc directory.
2966 m4_include([../config/tls.m4])