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 $host.
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${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($ac_fdsections)
188 AC_SUBST(SECTION_FLAGS)
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
203 dnl glibcxx_gnu_ld_version (possibly)
205 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
206 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
208 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
209 # If we're not using GNU ld, then there's no point in even trying these
210 # tests. Check for that first. We should have already tested for gld
211 # by now (in libtool), but require it now just to be safe...
212 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
213 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
214 AC_REQUIRE([AC_PROG_LD])
215 AC_REQUIRE([AC_PROG_AWK])
217 # The name set by libtool depends on the version of libtool. Shame on us
218 # for depending on an impl detail, but c'est la vie. Older versions used
219 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
220 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
221 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
222 # set (hence we're using an older libtool), then set it.
223 if test x${with_gnu_ld+set} != xset; then
224 if test x${ac_cv_prog_gnu_ld+set} != xset; then
225 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
228 with_gnu_ld=$ac_cv_prog_gnu_ld
232 # Start by getting the version number. I think the libtool test already
233 # does some of this, but throws away the result.
234 if test x"$with_gnu_ld" = x"yes"; then
235 AC_MSG_CHECKING([for ld version])
237 ldver=`$LD --version 2>/dev/null | head -1 | \
238 sed -e 's/GNU ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\3/'`
240 glibcxx_gnu_ld_version=`echo $ldver | \
241 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
242 AC_MSG_RESULT($glibcxx_gnu_ld_version)
246 glibcxx_gcsections_min_ld=21602
247 if test x"$with_gnu_ld" = x"yes" &&
248 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
250 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
251 # NB: This flag only works reliably after 2.16.1. Configure tests
252 # for this are difficult, so hard wire a value that should work.
254 ac_test_CFLAGS="${CFLAGS+set}"
255 ac_save_CFLAGS="$CFLAGS"
256 CFLAGS='-Wl,--gc-sections'
258 # Check for -Wl,--gc-sections
259 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
260 AC_TRY_LINK([ int one(void) { return 1; }
261 int two(void) { return 2; }
262 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
263 if test "$ac_gcsections" = "yes"; then
266 if $CC -c conftest.c; then
267 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
268 grep "Warning: gc-sections option ignored" > /dev/null; then
272 rm -f conftest.c conftest.o conftest
274 if test "$ac_gcsections" = "yes"; then
275 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
277 AC_MSG_RESULT($ac_gcsections)
279 if test "$ac_test_CFLAGS" = set; then
280 CFLAGS="$ac_save_CFLAGS"
282 # this is the suspicious part
288 # Note this is only for shared objects.
290 if test x"$with_gnu_ld" = x"yes"; then
291 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
292 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
293 if test -n "$cxx_z_relo"; then
294 OPT_LDFLAGS="-Wl,-z,relro"
297 AC_MSG_RESULT($ac_ld_relro)
300 # Set linker optimization flags.
301 if test x"$with_gnu_ld" = x"yes"; then
302 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
305 AC_SUBST(SECTION_LDFLAGS)
306 AC_SUBST(OPT_LDFLAGS)
311 dnl Check for headers for, and arguments to, the setrlimit() function.
312 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
315 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
316 dnl various HAVE_LIMIT_* for individual limit names
318 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
319 AC_MSG_CHECKING([for RLIMIT_$1])
322 #include <sys/time.h>
323 #include <sys/resource.h>
325 [ int f = RLIMIT_$1 ; ],
326 [glibcxx_mresult=1], [glibcxx_mresult=0])
327 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
328 [Only used in build directory testsuite_hooks.h.])
329 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
333 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
334 setrlimit_have_headers=yes
335 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
337 [setrlimit_have_headers=no])
338 # If don't have the headers, then we can't run the tests now, and we
339 # won't be seeing any of these during testsuite compilation.
340 if test $setrlimit_have_headers = yes; then
341 # Can't do these in a loop, else the resulting syntax is wrong.
342 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
343 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
344 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
345 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
346 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
348 # Check for rlimit, setrlimit.
349 AC_CACHE_VAL(ac_setrlimit, [
352 #include <sys/time.h>
353 #include <sys/resource.h>
357 [ac_setrlimit=yes], [ac_setrlimit=no])
361 AC_MSG_CHECKING([for testsuite resource limits support])
362 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
364 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
365 [Define if using setrlimit to set resource limits during
370 AC_MSG_RESULT($ac_res_limits)
375 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
376 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
378 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
379 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
380 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
382 [#include <sys/stat.h>],
385 S_ISREG(buffer.st_mode);],
386 [glibcxx_cv_S_ISREG=yes],
387 [glibcxx_cv_S_ISREG=no])
389 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
391 [#include <sys/stat.h>],
394 S_IFREG & buffer.st_mode;],
395 [glibcxx_cv_S_IFREG=yes],
396 [glibcxx_cv_S_IFREG=no])
399 if test $glibcxx_cv_S_ISREG = yes; then
400 AC_DEFINE(HAVE_S_ISREG, 1,
401 [Define if S_IFREG is available in <sys/stat.h>.])
403 elif test $glibcxx_cv_S_IFREG = yes; then
404 AC_DEFINE(HAVE_S_IFREG, 1,
405 [Define if S_IFREG is available in <sys/stat.h>.])
413 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
415 AC_DEFUN([GLIBCXX_CHECK_POLL], [
416 AC_MSG_CHECKING([for poll])
417 AC_CACHE_VAL(glibcxx_cv_POLL, [
420 [struct pollfd pfd[1];
421 pfd[0].events = POLLIN;
423 [glibcxx_cv_POLL=yes],
424 [glibcxx_cv_POLL=no])
426 if test $glibcxx_cv_POLL = yes; then
427 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
429 AC_MSG_RESULT($glibcxx_cv_POLL)
434 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
436 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
437 AC_MSG_CHECKING([for writev])
438 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
440 [#include <sys/uio.h>],
441 [struct iovec iov[2];
443 [glibcxx_cv_WRITEV=yes],
444 [glibcxx_cv_WRITEV=no])
446 if test $glibcxx_cv_WRITEV = yes; then
447 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
449 AC_MSG_RESULT($glibcxx_cv_WRITEV)
454 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
456 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
457 AC_MSG_CHECKING([for int64_t])
458 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
460 [#include <stdint.h>],
462 [glibcxx_cv_INT64_T=yes],
463 [glibcxx_cv_INT64_T=no])
465 if test $glibcxx_cv_INT64_T = yes; then
466 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
468 AC_MSG_RESULT($glibcxx_cv_INT64_T)
473 dnl Check whether LFS support is available.
475 AC_DEFUN([GLIBCXX_CHECK_LFS], [
478 ac_save_CXXFLAGS="$CXXFLAGS"
479 CXXFLAGS="$CXXFLAGS -fno-exceptions"
480 AC_MSG_CHECKING([for LFS support])
481 AC_CACHE_VAL(glibcxx_cv_LFS, [
485 #include <sys/stat.h>
489 fseeko64(fp, 0, SEEK_CUR);
491 lseek64(1, 0, SEEK_CUR);
494 [glibcxx_cv_LFS=yes],
497 if test $glibcxx_cv_LFS = yes; then
498 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
500 AC_MSG_RESULT($glibcxx_cv_LFS)
501 CXXFLAGS="$ac_save_CXXFLAGS"
507 dnl Check for whether a fully dynamic basic_string implementation should
508 dnl be turned on, that does not put empty objects in per-process static
509 dnl memory (mostly useful together with shared memory allocators, see PR
510 dnl libstdc++/16612 for details).
512 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
513 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
514 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
515 dnl Where DEFAULT is either `yes' or `no'.
517 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
518 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
519 if test $enable_fully_dynamic_string = yes; then
520 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
521 [Define if a fully dynamic basic_string is wanted.])
527 dnl Does any necessary configuration of the testsuite directory. Generates
528 dnl the testsuite_hooks.h header.
530 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
534 dnl GLIBCXX_TEST_WCHAR_T
535 dnl GLIBCXX_TEST_THREAD
539 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
540 if $GLIBCXX_IS_NATIVE ; then
541 # Do checks for resource limit functions.
542 GLIBCXX_CHECK_SETRLIMIT
544 # Look for setenv, so that extended locale tests can be performed.
545 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
548 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
549 test $enable_symvers != no; then
552 enable_abi_check=no ;;
554 enable_abi_check=yes ;;
557 # Only build this as native, since automake does not understand
562 # Export file names for ABI checking.
563 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
564 AC_SUBST(baseline_dir)
569 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
573 dnl TOPLEVEL_INCLUDES
575 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
576 # Used for every C++ compile we perform.
578 -I$glibcxx_builddir/include/$host_alias \
579 -I$glibcxx_builddir/include \
580 -I$glibcxx_srcdir/libsupc++"
582 # For Canadian crosses, pick this up too.
583 if test $CANADIAN = yes; then
584 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
587 # Stuff in the actual top level. Currently only used by libsupc++ to
588 # get unwind* headers from the gcc dir.
589 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
590 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
592 # Now, export this to all the little Makefiles....
593 AC_SUBST(GLIBCXX_INCLUDES)
594 AC_SUBST(TOPLEVEL_INCLUDES)
599 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
600 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
603 dnl OPTIMIZE_CXXFLAGS
606 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
607 # Optimization flags that are probably a good idea for thrill-seekers. Just
608 # uncomment the lines below and make, everything else is ready to go...
609 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
610 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
611 AC_SUBST(OPTIMIZE_CXXFLAGS)
613 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
619 dnl All installation directory information is determined here.
623 dnl glibcxx_prefixdir
624 dnl glibcxx_toolexecdir
625 dnl glibcxx_toolexeclibdir
627 dnl Assumes cross_compiling bits already done, and with_cross_host in
630 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
631 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
632 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
633 glibcxx_toolexecdir=no
634 glibcxx_toolexeclibdir=no
635 glibcxx_prefixdir=$prefix
637 AC_MSG_CHECKING([for gxx-include-dir])
638 AC_ARG_WITH([gxx-include-dir],
639 AC_HELP_STRING([--with-gxx-include-dir=DIR],
640 [installation directory for include files]),
642 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
643 no) gxx_include_dir=no ;;
644 *) gxx_include_dir=$withval ;;
646 [gxx_include_dir=no])
647 AC_MSG_RESULT($gxx_include_dir)
649 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
650 AC_ARG_ENABLE([version-specific-runtime-libs],
651 AC_HELP_STRING([--enable-version-specific-runtime-libs],
652 [Specify that runtime libraries should be installed in a compiler-specific directory]),
653 [case "$enableval" in
654 yes) version_specific_libs=yes ;;
655 no) version_specific_libs=no ;;
656 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
658 [version_specific_libs=no])
659 AC_MSG_RESULT($version_specific_libs)
661 # Default case for install directory for include files.
662 if test $version_specific_libs = no && test $gxx_include_dir = no; then
663 gxx_include_dir='include/c++/${gcc_version}'
664 if test -n "$with_cross_host" &&
665 test x"$with_cross_host" != x"no"; then
666 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
668 gxx_include_dir='${prefix}/'"$gxx_include_dir"
672 # Version-specific runtime libs processing.
673 if test $version_specific_libs = yes; then
674 # Need the gcc compiler version to know where to install libraries
675 # and header files if --enable-version-specific-runtime-libs option
676 # is selected. FIXME: these variables are misnamed, there are
677 # no executables installed in _toolexecdir or _toolexeclibdir.
678 if test x"$gxx_include_dir" = x"no"; then
679 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
681 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
682 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
685 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
686 # Install a library built with a cross compiler in tooldir, not libdir.
687 if test x"$glibcxx_toolexecdir" = x"no"; then
688 if test -n "$with_cross_host" &&
689 test x"$with_cross_host" != x"no"; then
690 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
691 glibcxx_toolexeclibdir='${toolexecdir}/lib'
693 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
694 glibcxx_toolexeclibdir='${libdir}'
696 multi_os_directory=`$CXX -print-multi-os-directory`
697 case $multi_os_directory in
698 .) ;; # Avoid trailing /.
699 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
703 AC_MSG_CHECKING([for install location])
704 AC_MSG_RESULT($gxx_include_dir)
706 AC_SUBST(glibcxx_prefixdir)
707 AC_SUBST(gxx_include_dir)
708 AC_SUBST(glibcxx_toolexecdir)
709 AC_SUBST(glibcxx_toolexeclibdir)
715 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
716 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
717 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
719 dnl See docs/html/17_intro/configury.html#enable for documentation.
721 m4_define([GLIBCXX_ENABLE],[dnl
722 m4_define([_g_switch],[--enable-$1])dnl
723 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
724 AC_ARG_ENABLE($1,_g_help,
729 m4_bpatsubst([$5],[permit ])) ;;
730 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
731 dnl Idea for future: generate a URL pointing to
732 dnl "onlinedocs/configopts.html#whatever"
739 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
743 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
744 m4_undefine([_g_switch])dnl
745 m4_undefine([_g_help])dnl
750 dnl Check for ISO/IEC 9899:1999 "C99" support.
752 dnl --enable-c99 defines _GLIBCXX_USE_C99
753 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
754 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
755 dnl Where DEFAULT is either `yes' or `no'.
756 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
758 AC_DEFUN([GLIBCXX_ENABLE_C99], [
759 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
761 if test x"$enable_c99" = x"yes"; then
766 # Check for the existence of <math.h> functions used if C99 is enabled.
767 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
768 AC_CACHE_VAL(ac_c99_math, [
769 AC_TRY_COMPILE([#include <math.h>],
777 isgreaterequal(0.0,0.0);
779 islessequal(0.0,0.0);
780 islessgreater(0.0,0.0);
781 islessgreater(0.0,0.0);
782 isunordered(0.0,0.0);
783 ],[ac_c99_math=yes], [ac_c99_math=no])
785 AC_MSG_RESULT($ac_c99_math)
786 if test x"$ac_c99_math" = x"yes"; then
787 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
788 [Define if C99 functions or macros in <math.h> should be imported
789 in <cmath> in namespace std.])
792 # Check for the existence of <complex.h> complex math functions.
793 # This is necessary even though libstdc++ uses the builtin versions
794 # of these functions, because if the builtin cannot be used, a reference
795 # to the library function is emitted.
796 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
797 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
799 if test x"$ac_has_complex_h" = x"yes"; then
800 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
801 AC_TRY_COMPILE([#include <complex.h>],
802 [typedef __complex__ float float_type; float_type tmpf;
815 typedef __complex__ double double_type; double_type tmpd;
828 typedef __complex__ long double ld_type; ld_type tmpld;
841 ],[ac_c99_complex=yes], [ac_c99_complex=no])
843 AC_MSG_RESULT($ac_c99_complex)
844 if test x"$ac_c99_complex" = x"yes"; then
845 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
846 [Define if C99 functions in <complex.h> should be used in
847 <complex>. Using compiler builtins for these functions requires
848 corresponding C99 library functions to be present.])
851 # Check for the existence in <stdio.h> of vscanf, et. al.
852 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
853 AC_CACHE_VAL(ac_c99_stdio, [
854 AC_TRY_COMPILE([#include <stdio.h>
856 void foo(char* fmt, ...)
858 va_list args; va_start(args, fmt);
859 vfscanf(stderr, "%i", args);
861 vsnprintf(fmt, 0, "%i", args);
862 vsscanf(fmt, "%i", args);
864 [snprintf("12", 0, "%i");],
865 [ac_c99_stdio=yes], [ac_c99_stdio=no])
867 AC_MSG_RESULT($ac_c99_stdio)
869 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
870 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
871 AC_CACHE_VAL(ac_c99_stdlib, [
872 AC_TRY_COMPILE([#include <stdlib.h>],
875 strtold("gnu", &tmp);
876 strtoll("gnu", &tmp, 10);
877 strtoull("gnu", &tmp, 10);
882 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
884 AC_MSG_RESULT($ac_c99_stdlib)
886 # Check for the existence in <wchar.h> of wcstold, etc.
888 if test x"$ac_has_wchar_h" = xyes &&
889 test x"$ac_has_wctype_h" = xyes; then
890 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
891 AC_TRY_COMPILE([#include <wchar.h>
898 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
900 # Checks for wide character functions that may not be present.
901 # Injection of these is wrapped with guard macros.
902 # NB: only put functions here, instead of immediately above, if
903 # absolutely necessary.
904 AC_TRY_COMPILE([#include <wchar.h>
905 namespace test { using ::vfwscanf; } ], [],
906 [AC_DEFINE(HAVE_VFWSCANF,1,
907 [Defined if vfwscanf exists.])],[])
909 AC_TRY_COMPILE([#include <wchar.h>
910 namespace test { using ::vswscanf; } ], [],
911 [AC_DEFINE(HAVE_VSWSCANF,1,
912 [Defined if vswscanf exists.])],[])
914 AC_TRY_COMPILE([#include <wchar.h>
915 namespace test { using ::vwscanf; } ], [],
916 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
918 AC_TRY_COMPILE([#include <wchar.h>
919 namespace test { using ::wcstof; } ], [],
920 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
922 AC_TRY_COMPILE([#include <wctype.h>],
923 [ wint_t t; int i = iswblank(t);],
924 [AC_DEFINE(HAVE_ISWBLANK,1,
925 [Defined if iswblank exists.])],[])
927 AC_MSG_RESULT($ac_c99_wchar)
930 # Option parsed, now set things appropriately.
931 if test x"$ac_c99_math" = x"no" ||
932 test x"$ac_c99_complex" = x"no" ||
933 test x"$ac_c99_stdio" = x"no" ||
934 test x"$ac_c99_stdlib" = x"no" ||
935 test x"$ac_c99_wchar" = x"no"; then
938 AC_DEFINE(_GLIBCXX_USE_C99, 1,
939 [Define if C99 functions or macros from <wchar.h>, <math.h>,
940 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
946 AC_MSG_CHECKING([for fully enabled ISO C99 support])
947 AC_MSG_RESULT($enable_c99)
952 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
953 dnl facilities in Chapter 8, "C compatibility".
955 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
960 # Check for the existence of <complex.h> complex math functions used
962 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
963 ac_c99_complex_tr1=no;
964 if test x"$ac_has_complex_h" = x"yes"; then
965 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
966 AC_TRY_COMPILE([#include <complex.h>],
967 [typedef __complex__ float float_type; float_type tmpf;
974 typedef __complex__ double double_type; double_type tmpd;
981 typedef __complex__ long double ld_type; ld_type tmpld;
988 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
990 AC_MSG_RESULT($ac_c99_complex_tr1)
991 if test x"$ac_c99_complex_tr1" = x"yes"; then
992 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
993 [Define if C99 functions in <complex.h> should be used in
994 <tr1/complex>. Using compiler builtins for these functions
995 requires corresponding C99 library functions to be present.])
998 # Check for the existence of <ctype.h> functions.
999 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1000 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1001 AC_TRY_COMPILE([#include <ctype.h>],
1005 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1007 AC_MSG_RESULT($ac_c99_ctype_tr1)
1008 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1009 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1010 [Define if C99 functions in <ctype.h> should be imported in
1011 <tr1/cctype> in namespace std::tr1.])
1014 # Check for the existence of <fenv.h> functions.
1015 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1017 if test x"$ac_has_fenv_h" = x"yes"; then
1018 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1019 AC_TRY_COMPILE([#include <fenv.h>],
1024 ret = feclearexcept(except);
1025 ret = fegetexceptflag(pflag, except);
1026 ret = feraiseexcept(except);
1027 ret = fesetexceptflag(pflag, except);
1028 ret = fetestexcept(except);
1030 ret = fesetround(mode);
1031 ret = fegetenv(penv);
1032 ret = feholdexcept(penv);
1033 ret = fesetenv(penv);
1034 ret = feupdateenv(penv);
1035 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1037 AC_MSG_RESULT($ac_c99_fenv_tr1)
1038 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1039 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1040 [Define if C99 functions in <fenv.h> should be imported in
1041 <tr1/cfenv> in namespace std::tr1.])
1044 # Check for the existence of <stdint.h> types.
1045 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1046 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1047 AC_TRY_COMPILE([#include <stdint.h>],
1048 [typedef int8_t my_int8_t;
1049 typedef int16_t my_int16_t;
1050 typedef int32_t my_int32_t;
1051 typedef int64_t my_int64_t;
1052 typedef int_fast8_t my_int_fast8_t;
1053 typedef int_fast16_t my_int_fast16_t;
1054 typedef int_fast32_t my_int_fast32_t;
1055 typedef int_fast64_t my_int_fast64_t;
1056 typedef int_least8_t my_int_least8_t;
1057 typedef int_least16_t my_int_least16_t;
1058 typedef int_least32_t my_int_least32_t;
1059 typedef int_least64_t my_int_least64_t;
1060 typedef intmax_t my_intmax_t;
1061 typedef intptr_t my_intptr_t;
1062 typedef uint8_t my_uint8_t;
1063 typedef uint16_t my_uint16_t;
1064 typedef uint32_t my_uint32_t;
1065 typedef uint64_t my_uint64_t;
1066 typedef uint_fast8_t my_uint_fast8_t;
1067 typedef uint_fast16_t my_uint_fast16_t;
1068 typedef uint_fast32_t my_uint_fast32_t;
1069 typedef uint_fast64_t my_uint_fast64_t;
1070 typedef uint_least8_t my_uint_least8_t;
1071 typedef uint_least16_t my_uint_least16_t;
1072 typedef uint_least32_t my_uint_least32_t;
1073 typedef uint_least64_t my_uint_least64_t;
1074 typedef uintmax_t my_uintmax_t;
1075 typedef uintptr_t my_uintptr_t;
1076 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1078 AC_MSG_RESULT($ac_c99_stdint_tr1)
1079 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1080 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1081 [Define if C99 types in <stdint.h> should be imported in
1082 <tr1/cstdint> in namespace std::tr1.])
1085 # Check for the existence of <math.h> functions.
1086 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1087 AC_CACHE_VAL(ac_c99_math_tr1, [
1088 AC_TRY_COMPILE([#include <math.h>],
1089 [typedef double_t my_double_t;
1090 typedef float_t my_float_t;
1104 copysignf(0.0f, 0.0f);
1105 copysignl(0.0l, 0.0l);
1122 fmaf(0.0f, 0.0f, 0.0f);
1123 fmal(0.0l, 0.0l, 0.0l);
1166 nextafter(0.0, 0.0);
1167 nextafterf(0.0f, 0.0f);
1168 nextafterl(0.0l, 0.0l);
1169 nexttoward(0.0, 0.0);
1170 nexttowardf(0.0f, 0.0f);
1171 nexttowardl(0.0l, 0.0l);
1172 remainder(0.0, 0.0);
1173 remainderf(0.0f, 0.0f);
1174 remainderl(0.0l, 0.0l);
1175 remquo(0.0, 0.0, 0);
1176 remquo(0.0f, 0.0f, 0);
1177 remquo(0.0l, 0.0l, 0);
1196 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1198 AC_MSG_RESULT($ac_c99_math_tr1)
1199 if test x"$ac_c99_math_tr1" = x"yes"; then
1200 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1201 [Define if C99 functions or macros in <math.h> should be imported
1202 in <tr1/cmath> in namespace std::tr1.])
1205 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1206 # sense if the previous check fails, per C99, 7.8/1).
1207 ac_c99_inttypes_tr1=no;
1208 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1209 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1210 AC_TRY_COMPILE([#include <inttypes.h>],
1211 [intmax_t i, numer, denom, base;
1214 intmax_t ret = imaxabs(i);
1215 imaxdiv_t dret = imaxdiv(numer, denom);
1216 ret = strtoimax(s, endptr, base);
1217 uintmax_t uret = strtoumax(s, endptr, base);
1218 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1220 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1221 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1222 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1223 [Define if C99 functions in <inttypes.h> should be imported in
1224 <tr1/cinttypes> in namespace std::tr1.])
1227 # Check for the existence of the <stdbool.h> header.
1228 AC_CHECK_HEADERS(stdbool.h)
1234 dnl Check whether "dev/random" and "dev/urandom" are available for the
1235 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1237 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1239 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1240 AC_CACHE_VAL(ac_random_tr1, [
1241 AC_TRY_RUN([#include <stdio.h>
1244 return !(fopen("/dev/random", "r")
1245 && fopen("/dev/urandom", "r"));
1248 [ac_random_tr1=yes], [ac_random_tr1=no],
1251 AC_MSG_RESULT($ac_random_tr1)
1252 if test x"$ac_random_tr1" = x"yes"; then
1253 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1254 [Define if dev/random and dev/urandom are available for
1255 the random_device of TR1 (Chapter 5.1).])
1261 dnl Check for what type of C headers to use.
1263 dnl --enable-cheaders= [does stuff].
1264 dnl --disable-cheaders [does not do anything, really].
1265 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1266 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1268 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1269 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1270 [construct "C" headers for g++], [permit c|c_std|c_global])
1271 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1273 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1275 # Allow overrides to configure.host here.
1276 if test $enable_cheaders = c_global; then
1280 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1284 AC_SUBST(C_INCLUDE_DIR)
1285 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1286 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1287 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1288 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1289 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1294 dnl Check for which locale library to use. The choice is mapped to
1295 dnl a subdirectory of config/locale.
1297 dnl Default is generic.
1299 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1300 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1301 [use MODEL for target locale package],
1302 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1304 # Deal with gettext issues. Default to not using it (=no) until we detect
1305 # support for it later. Let the user turn it off via --e/d, but let that
1306 # default to on for easier handling.
1309 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1313 # Either a known packaage, or "auto"
1314 if test $enable_clocale = no || test $enable_clocale = yes; then
1317 enable_clocale_flag=$enable_clocale
1319 # Probe for locale model to use if none specified.
1320 # Default to "generic".
1321 if test $enable_clocale_flag = auto; then
1322 case ${target_os} in
1323 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1324 enable_clocale_flag=gnu
1327 enable_clocale_flag=darwin
1330 enable_clocale_flag=generic
1335 # Sanity check model, and test for special functionality.
1336 if test $enable_clocale_flag = gnu; then
1337 AC_EGREP_CPP([_GLIBCXX_ok], [
1338 #include <features.h>
1339 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1342 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1344 # Test for bugs early in glibc-2.2.x series
1346 #define _GNU_SOURCE 1
1349 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1350 extern __typeof(newlocale) __newlocale;
1351 extern __typeof(duplocale) __duplocale;
1352 extern __typeof(strcoll_l) __strcoll_l;
1356 const char __one[] = "Äuglein Augmen";
1357 const char __two[] = "Äuglein";
1362 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1363 loc_dup = __duplocale(loc);
1364 i = __strcoll_l(__one, __two, loc);
1365 j = __strcoll_l(__one, __two, loc_dup);
1369 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1370 [enable_clocale_flag=generic])
1372 # Set it to scream when it hurts.
1373 ac_save_CFLAGS="$CFLAGS"
1374 CFLAGS="-Wimplicit-function-declaration -Werror"
1376 # Use strxfrm_l if available.
1377 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1379 #include <locale.h>],
1380 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1381 AC_DEFINE(HAVE_STRXFRM_L, 1,
1382 [Define if strxfrm_l is available in <string.h>.]),)
1384 # Use strerror_l if available.
1385 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1387 #include <locale.h>],
1388 [__locale_t loc; strerror_l(5, loc);],
1389 AC_DEFINE(HAVE_STRERROR_L, 1,
1390 [Define if strerror_l is available in <string.h>.]),)
1392 CFLAGS="$ac_save_CFLAGS"
1395 # Perhaps use strerror_r if available, and strerror_l isn't.
1396 ac_save_CFLAGS="$CFLAGS"
1397 CFLAGS="-Wimplicit-function-declaration -Werror"
1398 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1400 #include <locale.h>],
1401 [char s[128]; strerror_r(5, s, 128);],
1402 AC_DEFINE(HAVE_STRERROR_R, 1,
1403 [Define if strerror_r is available in <string.h>.]),)
1404 CFLAGS="$ac_save_CFLAGS"
1406 # Set configure bits for specified locale package
1407 AC_MSG_CHECKING([for C locale to use])
1408 case ${enable_clocale_flag} in
1410 AC_MSG_RESULT(generic)
1412 CLOCALE_H=config/locale/generic/c_locale.h
1413 CLOCALE_CC=config/locale/generic/c_locale.cc
1414 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1415 CCOLLATE_CC=config/locale/generic/collate_members.cc
1416 CCTYPE_CC=config/locale/generic/ctype_members.cc
1417 CMESSAGES_H=config/locale/generic/messages_members.h
1418 CMESSAGES_CC=config/locale/generic/messages_members.cc
1419 CMONEY_CC=config/locale/generic/monetary_members.cc
1420 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1421 CTIME_H=config/locale/generic/time_members.h
1422 CTIME_CC=config/locale/generic/time_members.cc
1423 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1426 AC_MSG_RESULT(darwin or freebsd)
1428 CLOCALE_H=config/locale/generic/c_locale.h
1429 CLOCALE_CC=config/locale/generic/c_locale.cc
1430 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1431 CCOLLATE_CC=config/locale/generic/collate_members.cc
1432 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1433 CMESSAGES_H=config/locale/generic/messages_members.h
1434 CMESSAGES_CC=config/locale/generic/messages_members.cc
1435 CMONEY_CC=config/locale/generic/monetary_members.cc
1436 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1437 CTIME_H=config/locale/generic/time_members.h
1438 CTIME_CC=config/locale/generic/time_members.cc
1439 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1445 # Declare intention to use gettext, and add support for specific
1447 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1450 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1451 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1452 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1455 # Export the build objects.
1456 for ling in $ALL_LINGUAS; do \
1457 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1458 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1460 AC_SUBST(glibcxx_MOFILES)
1461 AC_SUBST(glibcxx_POFILES)
1463 CLOCALE_H=config/locale/gnu/c_locale.h
1464 CLOCALE_CC=config/locale/gnu/c_locale.cc
1465 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1466 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1467 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1468 CMESSAGES_H=config/locale/gnu/messages_members.h
1469 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1470 CMONEY_CC=config/locale/gnu/monetary_members.cc
1471 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1472 CTIME_H=config/locale/gnu/time_members.h
1473 CTIME_CC=config/locale/gnu/time_members.cc
1474 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1477 AC_MSG_RESULT(IEEE 1003.1)
1479 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1480 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1481 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1482 CCOLLATE_CC=config/locale/generic/collate_members.cc
1483 CCTYPE_CC=config/locale/generic/ctype_members.cc
1484 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1485 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1486 CMONEY_CC=config/locale/generic/monetary_members.cc
1487 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1488 CTIME_H=config/locale/generic/time_members.h
1489 CTIME_CC=config/locale/generic/time_members.cc
1490 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1494 # This is where the testsuite looks for locale catalogs, using the
1495 # -DLOCALEDIR define during testsuite compilation.
1496 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1497 AC_SUBST(glibcxx_localedir)
1499 # A standalone libintl (e.g., GNU libintl) may be in use.
1500 if test $USE_NLS = yes; then
1501 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1502 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1504 if test $USE_NLS = yes; then
1505 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1506 [Define if NLS translations are to be used.])
1511 AC_SUBST(CMESSAGES_H)
1512 AC_SUBST(CCODECVT_CC)
1513 AC_SUBST(CCOLLATE_CC)
1515 AC_SUBST(CMESSAGES_CC)
1517 AC_SUBST(CNUMERIC_CC)
1520 AC_SUBST(CLOCALE_CC)
1521 AC_SUBST(CLOCALE_INTERNAL_H)
1526 dnl Check for which std::allocator base class to use. The choice is
1527 dnl mapped from a subdirectory of include/ext.
1531 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1532 AC_MSG_CHECKING([for std::allocator base class])
1533 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1534 [use KIND for target std::allocator base],
1535 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1537 # If they didn't use this option switch, or if they specified --enable
1538 # with no specific model, we'll have to look for one. If they
1539 # specified --disable (???), do likewise.
1540 if test $enable_libstdcxx_allocator = no ||
1541 test $enable_libstdcxx_allocator = yes;
1543 enable_libstdcxx_allocator=auto
1546 # Either a known package, or "auto". Auto implies the default choice
1547 # for a particular platform.
1548 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1550 # Probe for host-specific support if no specific model is specified.
1552 if test $enable_libstdcxx_allocator_flag = auto; then
1553 case ${target_os} in
1554 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1555 enable_libstdcxx_allocator_flag=new
1558 enable_libstdcxx_allocator_flag=new
1562 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1565 # Set configure bits for specified locale package
1566 case ${enable_libstdcxx_allocator_flag} in
1568 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1569 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1572 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1573 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1576 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1577 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1580 ALLOCATOR_H=config/allocator/new_allocator_base.h
1581 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1584 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1585 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1589 AC_SUBST(ALLOCATOR_H)
1590 AC_SUBST(ALLOCATOR_NAME)
1595 dnl Check for whether the Boost-derived checks should be turned on.
1597 dnl --enable-concept-checks turns them on.
1598 dnl --disable-concept-checks leaves them off.
1599 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1600 dnl Where DEFAULT is either `yes' or `no'.
1602 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1603 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1604 if test $enable_concept_checks = yes; then
1605 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1606 [Define to use concept checking code from the boost libraries.])
1612 dnl Check for which I/O library to use: stdio, or something specific.
1614 dnl Default is stdio.
1616 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1617 AC_MSG_CHECKING([for underlying I/O to use])
1618 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1619 [use target-specific I/O package], [permit stdio])
1621 # Now that libio has been removed, you can have any color you want as long
1622 # as it's black. This is one big no-op until other packages are added, but
1623 # showing the framework never hurts.
1624 case ${enable_cstdio} in
1626 CSTDIO_H=config/io/c_io_stdio.h
1627 BASIC_FILE_H=config/io/basic_file_stdio.h
1628 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1629 AC_MSG_RESULT(stdio)
1634 AC_SUBST(BASIC_FILE_H)
1635 AC_SUBST(BASIC_FILE_CC)
1640 dnl Check for "unusual" flags to pass to the compiler while building.
1642 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1643 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1644 dnl --disable-cxx-flags passes nothing.
1645 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1646 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1647 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1648 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1649 dnl If "default flags" is an empty string, the effect is the same
1650 dnl as --disable or --enable=no.
1652 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1653 AC_MSG_CHECKING([for extra compiler flags for building])
1654 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1655 [pass compiler FLAGS when building library],
1656 [case "x$enable_cxx_flags" in
1657 xno | x) enable_cxx_flags= ;;
1659 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1662 # Run through flags (either default or command-line) and set anything
1663 # extra (e.g., #defines) that must accompany particular g++ options.
1664 if test -n "$enable_cxx_flags"; then
1665 for f in $enable_cxx_flags; do
1669 *) # and we're trying to pass /what/ exactly?
1670 AC_MSG_ERROR([compiler flags start with a -]) ;;
1675 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1676 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1677 AC_SUBST(EXTRA_CXX_FLAGS)
1682 dnl Check to see if debugging libraries are to be built.
1684 dnl --enable-libstdcxx-debug
1685 dnl builds a separate set of debugging libraries in addition to the
1686 dnl normal (shared, static) libstdc++ binaries.
1688 dnl --disable-libstdcxx-debug
1689 dnl builds only one (non-debug) version of libstdc++.
1691 dnl --enable-libstdcxx-debug-flags=FLAGS
1692 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1694 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1695 dnl Where DEFAULT is either `yes' or `no'.
1697 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1698 AC_MSG_CHECKING([for additional debug build])
1699 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1700 AC_MSG_RESULT($enable_libstdcxx_debug)
1701 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1706 dnl Check for explicit debug flags.
1708 dnl --enable-libstdcxx-debug-flags='-O1'
1709 dnl is a general method for passing flags to be used when
1710 dnl building debug libraries with --enable-debug.
1712 dnl --disable-libstdcxx-debug-flags does nothing.
1713 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1714 dnl If "default flags" is an empty string, the effect is the same
1715 dnl as --disable or --enable=no.
1717 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1718 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1719 [pass compiler FLAGS when building debug library],
1720 [case "x$enable_libstdcxx_debug_flags" in
1721 xno | x) enable_libstdcxx_debug_flags= ;;
1723 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1726 # Option parsed, now set things appropriately
1727 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1728 AC_SUBST(DEBUG_FLAGS)
1730 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1735 dnl Check if the user only wants a freestanding library implementation.
1737 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1738 dnl installing only the headers required by [17.4.1.3] and the language
1739 dnl support library. More than that will be built (to keep the Makefiles
1740 dnl conveniently clean), but not installed.
1743 dnl is_hosted (yes/no)
1746 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1748 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1749 AC_ARG_ENABLE([hosted-libstdcxx],
1750 AC_HELP_STRING([--disable-hosted-libstdcxx],
1751 [only build freestanding C++ runtime support]),,
1754 enable_hosted_libstdcxx=no
1757 enable_hosted_libstdcxx=yes
1760 if test "$enable_hosted_libstdcxx" = no; then
1761 AC_MSG_NOTICE([Only freestanding libraries will be built])
1765 enable_libstdcxx_pch=no
1770 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1771 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1772 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1777 dnl Check for template specializations for the 'long long' type.
1778 dnl The result determines only whether 'long long' I/O is enabled; things
1779 dnl like numeric_limits<> specializations are always available.
1781 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1782 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1783 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1784 dnl Where DEFAULT is either `yes' or `no'.
1786 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1787 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1788 if test $enable_long_long = yes; then
1789 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1790 [Define if code specialized for long long should be used.])
1792 AC_MSG_CHECKING([for enabled long long specializations])
1793 AC_MSG_RESULT([$enable_long_long])
1798 dnl Check for template specializations for the 'wchar_t' type.
1800 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1801 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1802 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1803 dnl Where DEFAULT is either `yes' or `no'.
1805 dnl Necessary support must also be present.
1807 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1808 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1810 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1811 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1812 AC_MSG_CHECKING([for mbstate_t])
1813 AC_TRY_COMPILE([#include <wchar.h>],
1814 [mbstate_t teststate;],
1815 have_mbstate_t=yes, have_mbstate_t=no)
1816 AC_MSG_RESULT($have_mbstate_t)
1817 if test x"$have_mbstate_t" = xyes; then
1818 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1821 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1823 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1825 if test x"$enable_wchar_t" = x"yes"; then
1830 if test x"$ac_has_wchar_h" = xyes &&
1831 test x"$ac_has_wctype_h" = xyes; then
1832 AC_TRY_COMPILE([#include <wchar.h>
1893 ],[],[], [enable_wchar_t=no])
1901 if test x"$enable_wchar_t" = x"yes"; then
1902 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1903 [Define if code specialized for wchar_t should be used.])
1906 AC_MSG_CHECKING([for enabled wchar_t specializations])
1907 AC_MSG_RESULT([$enable_wchar_t])
1912 dnl Check to see if building and using a C++ precompiled header can be done.
1914 dnl --enable-libstdcxx-pch=yes
1915 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1916 dnl may work, after some light-hearted attempts to puzzle out compiler
1917 dnl support, flip bits on in include/Makefile.am
1919 dnl --disable-libstdcxx-pch
1920 dnl turns off attempts to use or build stdc++.h.gch.
1923 dnl glibcxx_PCHFLAGS
1925 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1926 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1927 if test $enable_libstdcxx_pch = yes; then
1928 AC_CACHE_CHECK([for compiler with PCH support],
1929 [glibcxx_cv_prog_CXX_pch],
1930 [ac_save_CXXFLAGS="$CXXFLAGS"
1931 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1934 echo '#include <math.h>' > conftest.h
1935 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1936 -o conftest.h.gch 1>&5 2>&1 &&
1937 echo '#error "pch failed"' > conftest.h &&
1938 echo '#include "conftest.h"' > conftest.cc &&
1939 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1941 glibcxx_cv_prog_CXX_pch=yes
1943 glibcxx_cv_prog_CXX_pch=no
1946 CXXFLAGS=$ac_save_CXXFLAGS
1949 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1952 AC_MSG_CHECKING([for enabled PCH])
1953 AC_MSG_RESULT([$enable_libstdcxx_pch])
1955 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1956 if test $enable_libstdcxx_pch = yes; then
1957 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
1961 AC_SUBST(glibcxx_PCHFLAGS)
1966 dnl Check for atomic builtins.
1968 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
1970 dnl This checks to see if the host supports the compiler-generated
1971 dnl builtins for atomic operations. Note, this is intended to be an
1972 dnl all-or-nothing switch, so all the atomic operations that are used
1973 dnl should be checked.
1976 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
1977 dnl see: CHECK_SYNC_FETCH_AND_ADD
1980 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
1982 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
1983 AC_MSG_CHECKING([for atomic builtins])
1987 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1988 cat > conftest.$ac_ext << EOF
1989 [#]line __oline__ "configure"
1992 // NB: _Atomic_word not necessarily int.
1993 typedef int atomic_type;
1996 const atomic_type c3(0);
1997 if (__sync_fetch_and_add(&c1, c2) == c3)
2004 old_CXXFLAGS="$CXXFLAGS"
2006 if AC_TRY_EVAL(ac_compile); then
2007 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2008 enable_atomic_builtins=no
2010 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2011 [Define if builtin atomic operations are supported on this host.])
2012 enable_atomic_builtins=yes
2013 atomicity_dir=cpu/generic/atomicity_builtins
2016 CXXFLAGS="$old_CXXFLAGS"
2019 # Now, if still generic, set to mutex.
2020 if test $atomicity_dir = "cpu/generic" ; then
2021 atomicity_dir=cpu/generic/atomicity_mutex
2024 AC_MSG_RESULT($enable_atomic_builtins)
2029 dnl Check for exception handling support. If an explicit enable/disable
2030 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2031 dnl target may or may not support call frame exceptions.
2033 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2034 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2035 dnl Neither one forces an attempt at detection.
2038 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2040 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2041 AC_MSG_CHECKING([for exception model to use])
2044 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2045 [force use of builtin_setjmp for exceptions],
2046 [permit yes|no|auto])
2048 if test $enable_sjlj_exceptions = auto; then
2049 # Botheration. Now we've got to detect the exception model. Link tests
2050 # against libgcc.a are problematic since we've not been given proper -L
2051 # bits for single-tree newlib and libgloss.
2053 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2054 cat > conftest.$ac_ext << EOF
2055 [#]line __oline__ "configure"
2064 old_CXXFLAGS="$CXXFLAGS"
2066 if AC_TRY_EVAL(ac_compile); then
2067 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2068 enable_sjlj_exceptions=yes
2069 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2070 enable_sjlj_exceptions=no
2071 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2072 enable_sjlj_exceptions=no
2075 CXXFLAGS="$old_CXXFLAGS"
2079 # This is a tad weird, for hysterical raisins. We have to map
2080 # enable/disable to two different models.
2081 case $enable_sjlj_exceptions in
2083 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2084 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2085 ac_exception_model_name=sjlj
2088 ac_exception_model_name="call frame"
2091 AC_MSG_ERROR([unable to detect exception model])
2095 AC_MSG_RESULT($ac_exception_model_name)
2100 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2102 dnl --enable-visibility enables attempt to use visibility attributes.
2103 dnl --disable-visibility turns off all use of visibility attributes.
2104 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2105 dnl Where DEFAULT is 'yes'.
2107 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2108 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2110 if test x$enable_visibility = xyes ; then
2111 dnl all hail libgfortran
2112 dnl Check whether the target supports hidden visibility.
2113 AC_CACHE_CHECK([whether the target supports hidden visibility],
2114 have_attribute_visibility, [
2115 save_CFLAGS="$CFLAGS"
2116 CFLAGS="$CFLAGS -Werror"
2117 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2118 [], have_attribute_visibility=yes,
2119 have_attribute_visibility=no)
2120 CFLAGS="$save_CFLAGS"])
2121 if test $have_attribute_visibility = no; then
2122 enable_visibility=no
2126 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2127 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2132 dnl Add version tags to symbols in shared library (or not), additionally
2133 dnl marking other symbols as private/local (or not).
2135 dnl --enable-symvers=style adds a version script to the linker call when
2136 dnl creating the shared library. The choice of version script is
2137 dnl controlled by 'style'.
2138 dnl --disable-symvers does not.
2139 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2140 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2141 dnl choose a default style based on linker characteristics. Passing
2142 dnl 'no' disables versioning.
2144 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2146 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2147 [enables symbol versioning of the shared library],
2148 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2150 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2151 # don't know enough about $LD to do tricks...
2152 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2154 # Turn a 'yes' into a suitable default.
2155 if test x$enable_symvers = xyes ; then
2156 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2159 if test $with_gnu_ld = yes ; then
2162 case ${target_os} in
2164 enable_symvers=darwin ;;
2166 enable_symvers=no ;;
2172 # Check to see if 'darwin' or 'darwin-export' can win.
2173 if test x$enable_symvers = xdarwin-export ; then
2174 enable_symvers=darwin
2177 # Check to see if 'gnu' can win.
2178 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2179 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2180 AC_MSG_CHECKING([for shared libgcc])
2181 ac_save_CFLAGS="$CFLAGS"
2183 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2184 CFLAGS="$ac_save_CFLAGS"
2185 if test $glibcxx_shared_libgcc = no; then
2186 cat > conftest.c <<EOF
2187 int main (void) { return 0; }
2190 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2191 -shared -shared-libgcc -o conftest.so \
2192 conftest.c -v 2>&1 >/dev/null \
2193 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2195 rm -f conftest.c conftest.so
2196 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2197 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2198 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2199 CFLAGS="$ac_save_CFLAGS"
2202 AC_MSG_RESULT($glibcxx_shared_libgcc)
2204 # For GNU ld, we need at least this version. The format is described in
2205 # GLIBCXX_CHECK_LINKER_FEATURES above.
2206 glibcxx_min_gnu_ld_version=21400
2208 # If no shared libgcc, can't win.
2209 if test $glibcxx_shared_libgcc != yes; then
2210 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2211 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2212 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2214 elif test $with_gnu_ld != yes ; then
2216 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2217 AC_MSG_WARN([=== you are not using the GNU linker.])
2218 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2220 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2221 # The right tools, the right setup, but too old. Fallbacks?
2222 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2223 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2224 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2225 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2226 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2231 # Everything parsed; figure out what file to use.
2232 case $enable_symvers in
2234 SYMVER_FILE=config/abi/pre/none.ver
2237 SYMVER_FILE=config/abi/pre/gnu.ver
2238 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2239 [Define to use GNU versioning in the shared library.])
2241 gnu-versioned-namespace)
2242 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2243 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2244 [Define to use GNU namespace versioning in the shared library.])
2247 SYMVER_FILE=config/abi/pre/gnu.ver
2248 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2249 [Define to use darwin versioning in the shared library.])
2253 if test x$enable_symvers != xno ; then
2254 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2255 [Define to use symbol versioning in the shared library.])
2258 AC_SUBST(SYMVER_FILE)
2259 AC_SUBST(port_specific_symbol_files)
2260 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2261 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2262 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2263 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2264 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2266 # Now, set up compatibility support, if any.
2267 # In addition, need this to deal with std::size_t mangling in
2268 # src/compatibility.cc. In a perfect world, could use
2269 # typeid(std::size_t).name()[0] to do direct substitution.
2270 AC_MSG_CHECKING([for size_t as unsigned int])
2271 ac_save_CFLAGS="$CFLAGS"
2273 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2274 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2275 CFLAGS=$ac_save_CFLAGS
2276 if test "$glibcxx_size_t_is_i" = yes; then
2277 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2279 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2281 AC_MSG_CHECKING([for ptrdiff_t as int])
2282 ac_save_CFLAGS="$CFLAGS"
2284 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2285 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2286 CFLAGS=$ac_save_CFLAGS
2287 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2288 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2290 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2295 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2296 dnl We must stage the required headers so that they will be installed
2297 dnl with the library (unlike libgcc, the STL implementation is provided
2298 dnl solely within headers). Since we must not inject random user-space
2299 dnl macro names into user-provided C++ code, we first stage into <file>-in
2300 dnl and process to <file> with an output command. The reason for a two-
2301 dnl stage process here is to correctly handle $srcdir!=$objdir without
2302 dnl having to write complex code (the sed commands to clean the macro
2303 dnl namespace are complex and fragile enough as it is). We must also
2304 dnl add a relative path so that -I- is supported properly.
2307 dnl glibcxx_thread_h
2310 dnl HAVE_GTHR_DEFAULT
2312 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2313 AC_MSG_CHECKING([for thread model used by GCC])
2314 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2315 AC_MSG_RESULT([$target_thread_file])
2317 if test $target_thread_file != single; then
2318 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2319 [Define if gthr-default.h exists
2320 (meaning that threading support is enabled).])
2323 glibcxx_thread_h=gthr-$target_thread_file.h
2325 dnl Check for __GTHREADS define.
2326 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2327 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2333 AC_SUBST(glibcxx_thread_h)
2337 # Check whether LC_MESSAGES is available in <locale.h>.
2338 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2340 # This file file be copied and used freely without restrictions. It can
2341 # be used in projects which are not available under the GNU Public License
2342 # but which still want to provide support for the GNU gettext functionality.
2343 # Please note that the actual code is *not* freely available.
2346 AC_DEFUN([AC_LC_MESSAGES], [
2347 AC_CHECK_HEADER(locale.h, [
2348 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2349 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2350 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2351 if test $ac_cv_val_LC_MESSAGES = yes; then
2352 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2353 [Define if LC_MESSAGES is available in <locale.h>.])
2358 # Macros from the top-level gcc directory.
2359 m4_include([../config/tls.m4])