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 # Use -fno-exceptions so that the C driver can link these tests without
767 # hitting undefined references to personality routines.
768 ac_save_CXXFLAGS="$CXXFLAGS"
769 CXXFLAGS="$CXXFLAGS -fno-exceptions"
771 # Check for the existence of <math.h> functions used if C99 is enabled.
772 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
773 AC_CACHE_VAL(ac_c99_math, [
774 GCC_TRY_COMPILE_OR_LINK(
776 volatile double d1, d2;
784 i = isgreater(d1, d2);
785 i = isgreaterequal(d1, d2);
787 i = islessequal(d1, d2);
788 i = islessgreater(d1, d2);
789 i = islessgreater(d1, d2);
790 i = isunordered(d1, d2);
791 ],[ac_c99_math=yes], [ac_c99_math=no])
793 AC_MSG_RESULT($ac_c99_math)
794 if test x"$ac_c99_math" = x"yes"; then
795 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
796 [Define if C99 functions or macros in <math.h> should be imported
797 in <cmath> in namespace std.])
800 # Check for the existence of <complex.h> complex math functions.
801 # This is necessary even though libstdc++ uses the builtin versions
802 # of these functions, because if the builtin cannot be used, a reference
803 # to the library function is emitted.
804 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
805 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
807 if test x"$ac_has_complex_h" = x"yes"; then
808 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
809 GCC_TRY_COMPILE_OR_LINK(
810 [#include <complex.h>
811 typedef __complex__ float float_type;
812 typedef __complex__ double double_type;
813 typedef __complex__ long double ld_type;
814 volatile float_type tmpf;
815 volatile double_type tmpd;
816 volatile ld_type tmpld;
819 volatile long double ld;],
831 tmpf = cpowf(tmpf, tmpf);
843 tmpd = cpow(tmpd, tmpd);
846 tmpld = ccosl(tmpld);
847 tmpld = ccoshl(tmpld);
848 tmpld = cexpl(tmpld);
849 tmpld = clogl(tmpld);
850 tmpld = csinl(tmpld);
851 tmpld = csinhl(tmpld);
852 tmpld = csqrtl(tmpld);
853 tmpld = ctanl(tmpld);
854 tmpld = ctanhl(tmpld);
855 tmpld = cpowl(tmpld, tmpld);
856 ],[ac_c99_complex=yes], [ac_c99_complex=no])
858 AC_MSG_RESULT($ac_c99_complex)
859 if test x"$ac_c99_complex" = x"yes"; then
860 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
861 [Define if C99 functions in <complex.h> should be used in
862 <complex>. Using compiler builtins for these functions requires
863 corresponding C99 library functions to be present.])
866 # Check for the existence in <stdio.h> of vscanf, et. al.
867 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
868 AC_CACHE_VAL(ac_c99_stdio, [
869 GCC_TRY_COMPILE_OR_LINK(
872 void foo(char* fmt, ...)
874 va_list args; va_start(args, fmt);
875 vfscanf(stderr, "%i", args);
877 vsnprintf(fmt, 0, "%i", args);
878 vsscanf(fmt, "%i", args);
880 [snprintf("12", 0, "%i");],
881 [ac_c99_stdio=yes], [ac_c99_stdio=no])
883 AC_MSG_RESULT($ac_c99_stdio)
885 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
886 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
887 AC_CACHE_VAL(ac_c99_stdlib, [
888 GCC_TRY_COMPILE_OR_LINK(
891 volatile long double ld;
892 volatile unsigned long long ll;
895 f = strtof("gnu", &tmp);
896 ld = strtold("gnu", &tmp);
897 ll = strtoll("gnu", &tmp, 10);
898 ll = strtoull("gnu", &tmp, 10);
900 mydivt = lldiv(10,1);
905 ],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
907 AC_MSG_RESULT($ac_c99_stdlib)
909 # Check for the existence in <wchar.h> of wcstold, etc.
911 if test x"$ac_has_wchar_h" = xyes &&
912 test x"$ac_has_wctype_h" = xyes; then
913 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
914 AC_TRY_COMPILE([#include <wchar.h>
921 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
923 # Checks for wide character functions that may not be present.
924 # Injection of these is wrapped with guard macros.
925 # NB: only put functions here, instead of immediately above, if
926 # absolutely necessary.
927 AC_TRY_COMPILE([#include <wchar.h>
928 namespace test { using ::vfwscanf; } ], [],
929 [AC_DEFINE(HAVE_VFWSCANF,1,
930 [Defined if vfwscanf exists.])],[])
932 AC_TRY_COMPILE([#include <wchar.h>
933 namespace test { using ::vswscanf; } ], [],
934 [AC_DEFINE(HAVE_VSWSCANF,1,
935 [Defined if vswscanf exists.])],[])
937 AC_TRY_COMPILE([#include <wchar.h>
938 namespace test { using ::vwscanf; } ], [],
939 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
941 AC_TRY_COMPILE([#include <wchar.h>
942 namespace test { using ::wcstof; } ], [],
943 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
945 AC_TRY_COMPILE([#include <wctype.h>],
946 [ wint_t t; int i = iswblank(t);],
947 [AC_DEFINE(HAVE_ISWBLANK,1,
948 [Defined if iswblank exists.])],[])
950 AC_MSG_RESULT($ac_c99_wchar)
953 # Option parsed, now set things appropriately.
954 if test x"$ac_c99_math" = x"no" ||
955 test x"$ac_c99_complex" = x"no" ||
956 test x"$ac_c99_stdio" = x"no" ||
957 test x"$ac_c99_stdlib" = x"no" ||
958 test x"$ac_c99_wchar" = x"no"; then
961 AC_DEFINE(_GLIBCXX_USE_C99, 1,
962 [Define if C99 functions or macros from <wchar.h>, <math.h>,
963 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
966 CXXFLAGS="$ac_save_CXXFLAGS"
970 AC_MSG_CHECKING([for fully enabled ISO C99 support])
971 AC_MSG_RESULT($enable_c99)
976 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
977 dnl facilities in Chapter 8, "C compatibility".
979 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
984 # Check for the existence of <complex.h> complex math functions used
986 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
987 ac_c99_complex_tr1=no;
988 if test x"$ac_has_complex_h" = x"yes"; then
989 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
990 AC_TRY_COMPILE([#include <complex.h>],
991 [typedef __complex__ float float_type; float_type tmpf;
998 typedef __complex__ double double_type; double_type tmpd;
1005 typedef __complex__ long double ld_type; ld_type tmpld;
1012 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1014 AC_MSG_RESULT($ac_c99_complex_tr1)
1015 if test x"$ac_c99_complex_tr1" = x"yes"; then
1016 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1017 [Define if C99 functions in <complex.h> should be used in
1018 <tr1/complex>. Using compiler builtins for these functions
1019 requires corresponding C99 library functions to be present.])
1022 # Check for the existence of <ctype.h> functions.
1023 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1024 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1025 AC_TRY_COMPILE([#include <ctype.h>],
1029 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1031 AC_MSG_RESULT($ac_c99_ctype_tr1)
1032 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1033 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1034 [Define if C99 functions in <ctype.h> should be imported in
1035 <tr1/cctype> in namespace std::tr1.])
1038 # Check for the existence of <fenv.h> functions.
1039 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1041 if test x"$ac_has_fenv_h" = x"yes"; then
1042 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1043 AC_TRY_COMPILE([#include <fenv.h>],
1048 ret = feclearexcept(except);
1049 ret = fegetexceptflag(pflag, except);
1050 ret = feraiseexcept(except);
1051 ret = fesetexceptflag(pflag, except);
1052 ret = fetestexcept(except);
1054 ret = fesetround(mode);
1055 ret = fegetenv(penv);
1056 ret = feholdexcept(penv);
1057 ret = fesetenv(penv);
1058 ret = feupdateenv(penv);
1059 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1061 AC_MSG_RESULT($ac_c99_fenv_tr1)
1062 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1063 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1064 [Define if C99 functions in <fenv.h> should be imported in
1065 <tr1/cfenv> in namespace std::tr1.])
1068 # Check for the existence of <stdint.h> types.
1069 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1070 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1071 AC_TRY_COMPILE([#include <stdint.h>],
1072 [typedef int8_t my_int8_t;
1073 typedef int16_t my_int16_t;
1074 typedef int32_t my_int32_t;
1075 typedef int64_t my_int64_t;
1076 typedef int_fast8_t my_int_fast8_t;
1077 typedef int_fast16_t my_int_fast16_t;
1078 typedef int_fast32_t my_int_fast32_t;
1079 typedef int_fast64_t my_int_fast64_t;
1080 typedef int_least8_t my_int_least8_t;
1081 typedef int_least16_t my_int_least16_t;
1082 typedef int_least32_t my_int_least32_t;
1083 typedef int_least64_t my_int_least64_t;
1084 typedef intmax_t my_intmax_t;
1085 typedef intptr_t my_intptr_t;
1086 typedef uint8_t my_uint8_t;
1087 typedef uint16_t my_uint16_t;
1088 typedef uint32_t my_uint32_t;
1089 typedef uint64_t my_uint64_t;
1090 typedef uint_fast8_t my_uint_fast8_t;
1091 typedef uint_fast16_t my_uint_fast16_t;
1092 typedef uint_fast32_t my_uint_fast32_t;
1093 typedef uint_fast64_t my_uint_fast64_t;
1094 typedef uint_least8_t my_uint_least8_t;
1095 typedef uint_least16_t my_uint_least16_t;
1096 typedef uint_least32_t my_uint_least32_t;
1097 typedef uint_least64_t my_uint_least64_t;
1098 typedef uintmax_t my_uintmax_t;
1099 typedef uintptr_t my_uintptr_t;
1100 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1102 AC_MSG_RESULT($ac_c99_stdint_tr1)
1103 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1104 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1105 [Define if C99 types in <stdint.h> should be imported in
1106 <tr1/cstdint> in namespace std::tr1.])
1109 # Check for the existence of <math.h> functions.
1110 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1111 AC_CACHE_VAL(ac_c99_math_tr1, [
1112 AC_TRY_COMPILE([#include <math.h>],
1113 [typedef double_t my_double_t;
1114 typedef float_t my_float_t;
1128 copysignf(0.0f, 0.0f);
1129 copysignl(0.0l, 0.0l);
1146 fmaf(0.0f, 0.0f, 0.0f);
1147 fmal(0.0l, 0.0l, 0.0l);
1190 nextafter(0.0, 0.0);
1191 nextafterf(0.0f, 0.0f);
1192 nextafterl(0.0l, 0.0l);
1193 nexttoward(0.0, 0.0);
1194 nexttowardf(0.0f, 0.0f);
1195 nexttowardl(0.0l, 0.0l);
1196 remainder(0.0, 0.0);
1197 remainderf(0.0f, 0.0f);
1198 remainderl(0.0l, 0.0l);
1199 remquo(0.0, 0.0, 0);
1200 remquo(0.0f, 0.0f, 0);
1201 remquo(0.0l, 0.0l, 0);
1220 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1222 AC_MSG_RESULT($ac_c99_math_tr1)
1223 if test x"$ac_c99_math_tr1" = x"yes"; then
1224 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1225 [Define if C99 functions or macros in <math.h> should be imported
1226 in <tr1/cmath> in namespace std::tr1.])
1229 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1230 # sense if the previous check fails, per C99, 7.8/1).
1231 ac_c99_inttypes_tr1=no;
1232 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1233 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1234 AC_TRY_COMPILE([#include <inttypes.h>],
1235 [intmax_t i, numer, denom, base;
1238 intmax_t ret = imaxabs(i);
1239 imaxdiv_t dret = imaxdiv(numer, denom);
1240 ret = strtoimax(s, endptr, base);
1241 uintmax_t uret = strtoumax(s, endptr, base);
1242 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1244 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1245 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1246 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1247 [Define if C99 functions in <inttypes.h> should be imported in
1248 <tr1/cinttypes> in namespace std::tr1.])
1251 # Check for the existence of the <stdbool.h> header.
1252 AC_CHECK_HEADERS(stdbool.h)
1258 dnl Check whether "dev/random" and "dev/urandom" are available for the
1259 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1261 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1263 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1264 AC_CACHE_VAL(ac_random_tr1, [
1265 AC_TRY_RUN([#include <stdio.h>
1268 return !(fopen("/dev/random", "r")
1269 && fopen("/dev/urandom", "r"));
1272 [ac_random_tr1=yes], [ac_random_tr1=no],
1275 AC_MSG_RESULT($ac_random_tr1)
1276 if test x"$ac_random_tr1" = x"yes"; then
1277 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1278 [Define if dev/random and dev/urandom are available for
1279 the random_device of TR1 (Chapter 5.1).])
1285 dnl Check whether macros, etc are present for <system_error>
1287 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1289 AC_MSG_CHECKING([for EOWNERDEAD])
1290 AC_CACHE_VAL(ac_system_error1, [
1291 AC_TRY_COMPILE([#include <errno.h>], [ int i = EOWNERDEAD; ],
1292 [ac_system_error1=yes], [ac_system_error1=no])
1294 AC_MSG_RESULT($ac_system_error1)
1295 if test x"$ac_system_error1" = x"yes"; then
1296 AC_DEFINE(HAVE_EOWNERDEAD, 1, [Define if EOWNERDEAD exists.])
1299 AC_MSG_CHECKING([for ENOTRECOVERABLE])
1300 AC_CACHE_VAL(ac_system_error2, [
1301 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOTRECOVERABLE; ],
1302 [ac_system_error2=yes], [ac_system_error2=no])
1304 AC_MSG_RESULT($ac_system_error2)
1305 if test x"$ac_system_error2" = x"yes"; then
1306 AC_DEFINE(HAVE_ENOTRECOVERABLE, 1, [Define if ENOTRECOVERABLE exists.])
1309 AC_MSG_CHECKING([for ENOLINK])
1310 AC_CACHE_VAL(ac_system_error3, [
1311 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOLINK; ],
1312 [ac_system_error3=yes], [ac_system_error3=no])
1314 AC_MSG_RESULT($ac_system_error3)
1315 if test x"$ac_system_error3" = x"yes"; then
1316 AC_DEFINE(HAVE_ENOLINK, 1, [Define if ENOLINK exists.])
1319 AC_MSG_CHECKING([for EPROTO])
1320 AC_CACHE_VAL(ac_system_error_4, [
1321 AC_TRY_COMPILE([#include <errno.h>], [ int i = EPROTO; ],
1322 [ac_system_error_4=yes], [ac_system_error_4=no])
1324 AC_MSG_RESULT($ac_system_error_4)
1325 if test x"$ac_system_error_4" = x"yes"; then
1326 AC_DEFINE(HAVE_EPROTO, 1, [Define if EPROTO exists.])
1329 AC_MSG_CHECKING([for ENODATA])
1330 AC_CACHE_VAL(ac_system_error_5, [
1331 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENODATA; ],
1332 [ac_system_error_5=yes], [ac_system_error_5=no])
1334 AC_MSG_RESULT($ac_system_error_5)
1335 if test x"$ac_system_error_5" = x"yes"; then
1336 AC_DEFINE(HAVE_ENODATA, 1, [Define if ENODATA exists.])
1339 AC_MSG_CHECKING([for ENOSR])
1340 AC_CACHE_VAL(ac_system_error_6, [
1341 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSR; ],
1342 [ac_system_error_6=yes], [ac_system_error_6=no])
1344 AC_MSG_RESULT($ac_system_error_6)
1345 if test x"$ac_system_error_6" = x"yes"; then
1346 AC_DEFINE(HAVE_ENOSR, 1, [Define if ENOSR exists.])
1349 AC_MSG_CHECKING([for ENOSTR])
1350 AC_CACHE_VAL(ac_system_error_7, [
1351 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSTR; ],
1352 [ac_system_error_7=yes], [ac_system_error_7=no])
1354 AC_MSG_RESULT($ac_system_error_7)
1355 if test x"$ac_system_error_7" = x"yes"; then
1356 AC_DEFINE(HAVE_ENOSTR, 1, [Define if ENOSTR exists.])
1359 AC_MSG_CHECKING([for ETIME])
1360 AC_CACHE_VAL(ac_system_error_8, [
1361 AC_TRY_COMPILE([#include <errno.h>], [ int i = ETIME; ],
1362 [ac_system_error_8=yes], [ac_system_error_8=no])
1364 AC_MSG_RESULT($ac_system_error_8)
1365 if test x"$ac_system_error_8" = x"yes"; then
1366 AC_DEFINE(HAVE_ETIME, 1, [Define if ETIME exists.])
1369 AC_MSG_CHECKING([for sys_nerr])
1370 AC_CACHE_VAL(ac_system_error9, [
1371 AC_TRY_COMPILE([#include <errno.h> ], [ int i = sys_nerr; ],
1372 [ac_system_error9=yes], [ac_system_error9=no])
1374 AC_MSG_RESULT($ac_system_error9)
1375 if test x"$ac_system_error9" = x"yes"; then
1376 AC_DEFINE(HAVE_SYS_NERR, 1, [Define if sys_nerr exists.])
1379 AC_MSG_CHECKING([for EBADMSG])
1380 AC_CACHE_VAL(ac_system_error_10, [
1381 AC_TRY_COMPILE([#include <errno.h>], [ int i = EBADMSG; ],
1382 [ac_system_error_10=yes], [ac_system_error_10=no])
1384 AC_MSG_RESULT($ac_system_error_10)
1385 if test x"$ac_system_error_10" = x"yes"; then
1386 AC_DEFINE(HAVE_EBADMSG, 1, [Define if EBADMSG exists.])
1389 AC_MSG_CHECKING([for ECANCELED])
1390 AC_CACHE_VAL(ac_system_error_11, [
1391 AC_TRY_COMPILE([#include <errno.h>], [ int i = ECANCELED; ],
1392 [ac_system_error_11=yes], [ac_system_error_11=no])
1394 AC_MSG_RESULT($ac_system_error_11)
1395 if test x"$ac_system_error_11" = x"yes"; then
1396 AC_DEFINE(HAVE_ECANCELED, 1, [Define if ECANCELED exists.])
1401 dnl Check for what type of C headers to use.
1403 dnl --enable-cheaders= [does stuff].
1404 dnl --disable-cheaders [does not do anything, really].
1405 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1406 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1408 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1409 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1410 [construct "C" headers for g++], [permit c|c_std|c_global])
1411 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1413 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1415 # Allow overrides to configure.host here.
1416 if test $enable_cheaders = c_global; then
1420 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1424 AC_SUBST(C_INCLUDE_DIR)
1425 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1426 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1427 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1428 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1429 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1434 dnl Check for which locale library to use. The choice is mapped to
1435 dnl a subdirectory of config/locale.
1437 dnl Default is generic.
1439 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1440 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1441 [use MODEL for target locale package],
1442 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1444 # Deal with gettext issues. Default to not using it (=no) until we detect
1445 # support for it later. Let the user turn it off via --e/d, but let that
1446 # default to on for easier handling.
1449 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1453 # Either a known packaage, or "auto"
1454 if test $enable_clocale = no || test $enable_clocale = yes; then
1457 enable_clocale_flag=$enable_clocale
1459 # Probe for locale model to use if none specified.
1460 # Default to "generic".
1461 if test $enable_clocale_flag = auto; then
1462 case ${target_os} in
1463 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1464 enable_clocale_flag=gnu
1467 enable_clocale_flag=darwin
1470 enable_clocale_flag=generic
1475 # Sanity check model, and test for special functionality.
1476 if test $enable_clocale_flag = gnu; then
1477 AC_EGREP_CPP([_GLIBCXX_ok], [
1478 #include <features.h>
1479 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1482 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1484 if test $enable_clocale = auto; then
1485 # Test for bugs early in glibc-2.2.x series
1487 #define _GNU_SOURCE 1
1490 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1491 extern __typeof(newlocale) __newlocale;
1492 extern __typeof(duplocale) __duplocale;
1493 extern __typeof(strcoll_l) __strcoll_l;
1497 const char __one[] = "Äuglein Augmen";
1498 const char __two[] = "Äuglein";
1503 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1504 loc_dup = __duplocale(loc);
1505 i = __strcoll_l(__one, __two, loc);
1506 j = __strcoll_l(__one, __two, loc_dup);
1510 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1511 [enable_clocale_flag=generic])
1514 # Set it to scream when it hurts.
1515 ac_save_CFLAGS="$CFLAGS"
1516 CFLAGS="-Wimplicit-function-declaration -Werror"
1518 # Use strxfrm_l if available.
1519 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1521 #include <locale.h>],
1522 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1523 AC_DEFINE(HAVE_STRXFRM_L, 1,
1524 [Define if strxfrm_l is available in <string.h>.]),)
1526 # Use strerror_l if available.
1527 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1529 #include <locale.h>],
1530 [__locale_t loc; strerror_l(5, loc);],
1531 AC_DEFINE(HAVE_STRERROR_L, 1,
1532 [Define if strerror_l is available in <string.h>.]),)
1534 CFLAGS="$ac_save_CFLAGS"
1537 # Perhaps use strerror_r if available, and strerror_l isn't.
1538 ac_save_CFLAGS="$CFLAGS"
1539 CFLAGS="-Wimplicit-function-declaration -Werror"
1540 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1542 #include <locale.h>],
1543 [char s[128]; strerror_r(5, s, 128);],
1544 AC_DEFINE(HAVE_STRERROR_R, 1,
1545 [Define if strerror_r is available in <string.h>.]),)
1546 CFLAGS="$ac_save_CFLAGS"
1548 # Set configure bits for specified locale package
1549 AC_MSG_CHECKING([for C locale to use])
1550 case ${enable_clocale_flag} in
1552 AC_MSG_RESULT(generic)
1554 CLOCALE_H=config/locale/generic/c_locale.h
1555 CLOCALE_CC=config/locale/generic/c_locale.cc
1556 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1557 CCOLLATE_CC=config/locale/generic/collate_members.cc
1558 CCTYPE_CC=config/locale/generic/ctype_members.cc
1559 CMESSAGES_H=config/locale/generic/messages_members.h
1560 CMESSAGES_CC=config/locale/generic/messages_members.cc
1561 CMONEY_CC=config/locale/generic/monetary_members.cc
1562 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1563 CTIME_H=config/locale/generic/time_members.h
1564 CTIME_CC=config/locale/generic/time_members.cc
1565 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1568 AC_MSG_RESULT(darwin or freebsd)
1570 CLOCALE_H=config/locale/generic/c_locale.h
1571 CLOCALE_CC=config/locale/generic/c_locale.cc
1572 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1573 CCOLLATE_CC=config/locale/generic/collate_members.cc
1574 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1575 CMESSAGES_H=config/locale/generic/messages_members.h
1576 CMESSAGES_CC=config/locale/generic/messages_members.cc
1577 CMONEY_CC=config/locale/generic/monetary_members.cc
1578 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1579 CTIME_H=config/locale/generic/time_members.h
1580 CTIME_CC=config/locale/generic/time_members.cc
1581 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1587 # Declare intention to use gettext, and add support for specific
1589 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1592 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1593 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1594 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1597 # Export the build objects.
1598 for ling in $ALL_LINGUAS; do \
1599 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1600 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1602 AC_SUBST(glibcxx_MOFILES)
1603 AC_SUBST(glibcxx_POFILES)
1605 CLOCALE_H=config/locale/gnu/c_locale.h
1606 CLOCALE_CC=config/locale/gnu/c_locale.cc
1607 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1608 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1609 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1610 CMESSAGES_H=config/locale/gnu/messages_members.h
1611 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1612 CMONEY_CC=config/locale/gnu/monetary_members.cc
1613 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1614 CTIME_H=config/locale/gnu/time_members.h
1615 CTIME_CC=config/locale/gnu/time_members.cc
1616 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1619 AC_MSG_RESULT(IEEE 1003.1)
1621 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1622 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1623 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1624 CCOLLATE_CC=config/locale/generic/collate_members.cc
1625 CCTYPE_CC=config/locale/generic/ctype_members.cc
1626 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1627 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1628 CMONEY_CC=config/locale/generic/monetary_members.cc
1629 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1630 CTIME_H=config/locale/generic/time_members.h
1631 CTIME_CC=config/locale/generic/time_members.cc
1632 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1636 # This is where the testsuite looks for locale catalogs, using the
1637 # -DLOCALEDIR define during testsuite compilation.
1638 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1639 AC_SUBST(glibcxx_localedir)
1641 # A standalone libintl (e.g., GNU libintl) may be in use.
1642 if test $USE_NLS = yes; then
1643 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1644 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1646 if test $USE_NLS = yes; then
1647 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1648 [Define if NLS translations are to be used.])
1653 AC_SUBST(CMESSAGES_H)
1654 AC_SUBST(CCODECVT_CC)
1655 AC_SUBST(CCOLLATE_CC)
1657 AC_SUBST(CMESSAGES_CC)
1659 AC_SUBST(CNUMERIC_CC)
1662 AC_SUBST(CLOCALE_CC)
1663 AC_SUBST(CLOCALE_INTERNAL_H)
1668 dnl Check for which std::allocator base class to use. The choice is
1669 dnl mapped from a subdirectory of include/ext.
1673 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1674 AC_MSG_CHECKING([for std::allocator base class])
1675 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1676 [use KIND for target std::allocator base],
1677 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1679 # If they didn't use this option switch, or if they specified --enable
1680 # with no specific model, we'll have to look for one. If they
1681 # specified --disable (???), do likewise.
1682 if test $enable_libstdcxx_allocator = no ||
1683 test $enable_libstdcxx_allocator = yes;
1685 enable_libstdcxx_allocator=auto
1688 # Either a known package, or "auto". Auto implies the default choice
1689 # for a particular platform.
1690 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1692 # Probe for host-specific support if no specific model is specified.
1694 if test $enable_libstdcxx_allocator_flag = auto; then
1695 case ${target_os} in
1696 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1697 enable_libstdcxx_allocator_flag=new
1700 enable_libstdcxx_allocator_flag=new
1704 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1707 # Set configure bits for specified locale package
1708 case ${enable_libstdcxx_allocator_flag} in
1710 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1711 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1714 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1715 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1718 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1719 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1722 ALLOCATOR_H=config/allocator/new_allocator_base.h
1723 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1726 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1727 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1731 AC_SUBST(ALLOCATOR_H)
1732 AC_SUBST(ALLOCATOR_NAME)
1737 dnl Check for whether the Boost-derived checks should be turned on.
1739 dnl --enable-concept-checks turns them on.
1740 dnl --disable-concept-checks leaves them off.
1741 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1742 dnl Where DEFAULT is either `yes' or `no'.
1744 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1745 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1746 if test $enable_concept_checks = yes; then
1747 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1748 [Define to use concept checking code from the boost libraries.])
1753 dnl Check for parallel mode pre-requisites, including OpenMP support.
1755 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1757 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1759 # NB: libstdc++ may be configured before libgomp: can't check for the actual
1760 # dependencies (omp.h and libgomp).
1762 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1763 enable_parallel=yes;
1765 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1768 # Check to see if it's explicitly disabled.
1769 # GLIBCXX_ENABLE(libgomp,$1,,[enable code depending on libgomp],
1772 # if test x$enable_libgomp = xno; then
1773 # enable_parallel=no
1776 AC_MSG_CHECKING([for parallel mode support])
1777 AC_MSG_RESULT([$enable_parallel])
1778 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1783 dnl Check for which I/O library to use: stdio, or something specific.
1785 dnl Default is stdio.
1787 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1788 AC_MSG_CHECKING([for underlying I/O to use])
1789 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1790 [use target-specific I/O package], [permit stdio])
1792 # Now that libio has been removed, you can have any color you want as long
1793 # as it's black. This is one big no-op until other packages are added, but
1794 # showing the framework never hurts.
1795 case ${enable_cstdio} in
1797 CSTDIO_H=config/io/c_io_stdio.h
1798 BASIC_FILE_H=config/io/basic_file_stdio.h
1799 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1800 AC_MSG_RESULT(stdio)
1805 AC_SUBST(BASIC_FILE_H)
1806 AC_SUBST(BASIC_FILE_CC)
1811 dnl Check for "unusual" flags to pass to the compiler while building.
1813 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1814 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1815 dnl --disable-cxx-flags passes nothing.
1816 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1817 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1818 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1819 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1820 dnl If "default flags" is an empty string, the effect is the same
1821 dnl as --disable or --enable=no.
1823 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1824 AC_MSG_CHECKING([for extra compiler flags for building])
1825 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1826 [pass compiler FLAGS when building library],
1827 [case "x$enable_cxx_flags" in
1828 xno | x) enable_cxx_flags= ;;
1830 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1833 # Run through flags (either default or command-line) and set anything
1834 # extra (e.g., #defines) that must accompany particular g++ options.
1835 if test -n "$enable_cxx_flags"; then
1836 for f in $enable_cxx_flags; do
1840 *) # and we're trying to pass /what/ exactly?
1841 AC_MSG_ERROR([compiler flags start with a -]) ;;
1846 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1847 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1848 AC_SUBST(EXTRA_CXX_FLAGS)
1853 dnl Check to see if debugging libraries are to be built.
1855 dnl --enable-libstdcxx-debug
1856 dnl builds a separate set of debugging libraries in addition to the
1857 dnl normal (shared, static) libstdc++ binaries.
1859 dnl --disable-libstdcxx-debug
1860 dnl builds only one (non-debug) version of libstdc++.
1862 dnl --enable-libstdcxx-debug-flags=FLAGS
1863 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1865 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1866 dnl Where DEFAULT is either `yes' or `no'.
1868 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1869 AC_MSG_CHECKING([for additional debug build])
1870 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1871 AC_MSG_RESULT($enable_libstdcxx_debug)
1872 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1877 dnl Check for explicit debug flags.
1879 dnl --enable-libstdcxx-debug-flags='-O1'
1880 dnl is a general method for passing flags to be used when
1881 dnl building debug libraries with --enable-debug.
1883 dnl --disable-libstdcxx-debug-flags does nothing.
1884 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1885 dnl If "default flags" is an empty string, the effect is the same
1886 dnl as --disable or --enable=no.
1888 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1889 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1890 [pass compiler FLAGS when building debug library],
1891 [case "x$enable_libstdcxx_debug_flags" in
1892 xno | x) enable_libstdcxx_debug_flags= ;;
1894 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1897 # Option parsed, now set things appropriately
1898 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1899 AC_SUBST(DEBUG_FLAGS)
1901 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1906 dnl Check if the user only wants a freestanding library implementation.
1908 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1909 dnl installing only the headers required by [17.4.1.3] and the language
1910 dnl support library. More than that will be built (to keep the Makefiles
1911 dnl conveniently clean), but not installed.
1914 dnl is_hosted (yes/no)
1917 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1919 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1920 AC_ARG_ENABLE([hosted-libstdcxx],
1921 AC_HELP_STRING([--disable-hosted-libstdcxx],
1922 [only build freestanding C++ runtime support]),,
1925 enable_hosted_libstdcxx=no
1928 enable_hosted_libstdcxx=yes
1931 if test "$enable_hosted_libstdcxx" = no; then
1932 AC_MSG_NOTICE([Only freestanding libraries will be built])
1936 enable_libstdcxx_pch=no
1941 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1942 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1943 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1948 dnl Check for template specializations for the 'long long' type.
1949 dnl The result determines only whether 'long long' I/O is enabled; things
1950 dnl like numeric_limits<> specializations are always available.
1952 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1953 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1954 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1955 dnl Where DEFAULT is either `yes' or `no'.
1957 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1958 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1959 if test $enable_long_long = yes; then
1960 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1961 [Define if code specialized for long long should be used.])
1963 AC_MSG_CHECKING([for enabled long long specializations])
1964 AC_MSG_RESULT([$enable_long_long])
1969 dnl Check for template specializations for the 'wchar_t' type.
1971 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1972 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1973 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1974 dnl Where DEFAULT is either `yes' or `no'.
1976 dnl Necessary support must also be present.
1978 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1979 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1981 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1982 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1983 AC_MSG_CHECKING([for mbstate_t])
1984 AC_TRY_COMPILE([#include <wchar.h>],
1985 [mbstate_t teststate;],
1986 have_mbstate_t=yes, have_mbstate_t=no)
1987 AC_MSG_RESULT($have_mbstate_t)
1988 if test x"$have_mbstate_t" = xyes; then
1989 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1992 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1994 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1996 if test x"$enable_wchar_t" = x"yes"; then
2001 if test x"$ac_has_wchar_h" = xyes &&
2002 test x"$ac_has_wctype_h" = xyes; then
2003 AC_TRY_COMPILE([#include <wchar.h>
2064 ],[],[], [enable_wchar_t=no])
2072 if test x"$enable_wchar_t" = x"yes"; then
2073 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2074 [Define if code specialized for wchar_t should be used.])
2077 AC_MSG_CHECKING([for enabled wchar_t specializations])
2078 AC_MSG_RESULT([$enable_wchar_t])
2083 dnl Check to see if building and using a C++ precompiled header can be done.
2085 dnl --enable-libstdcxx-pch=yes
2086 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2087 dnl may work, after some light-hearted attempts to puzzle out compiler
2088 dnl support, flip bits on in include/Makefile.am
2090 dnl --disable-libstdcxx-pch
2091 dnl turns off attempts to use or build stdc++.h.gch.
2094 dnl glibcxx_PCHFLAGS
2096 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2097 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2098 if test $enable_libstdcxx_pch = yes; then
2099 AC_CACHE_CHECK([for compiler with PCH support],
2100 [glibcxx_cv_prog_CXX_pch],
2101 [ac_save_CXXFLAGS="$CXXFLAGS"
2102 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2105 echo '#include <math.h>' > conftest.h
2106 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2107 -o conftest.h.gch 1>&5 2>&1 &&
2108 echo '#error "pch failed"' > conftest.h &&
2109 echo '#include "conftest.h"' > conftest.cc &&
2110 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2112 glibcxx_cv_prog_CXX_pch=yes
2114 glibcxx_cv_prog_CXX_pch=no
2117 CXXFLAGS=$ac_save_CXXFLAGS
2120 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2123 AC_MSG_CHECKING([for enabled PCH])
2124 AC_MSG_RESULT([$enable_libstdcxx_pch])
2126 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2127 if test $enable_libstdcxx_pch = yes; then
2128 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2132 AC_SUBST(glibcxx_PCHFLAGS)
2137 dnl Check for atomic builtins.
2139 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2141 dnl This checks to see if the host supports the compiler-generated
2142 dnl builtins for atomic operations. Note, this is intended to be an
2143 dnl all-or-nothing switch, so all the atomic operations that are used
2144 dnl should be checked.
2147 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2148 dnl see: CHECK_SYNC_FETCH_AND_ADD
2151 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
2153 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2154 AC_MSG_CHECKING([for atomic builtins])
2158 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2159 cat > conftest.$ac_ext << EOF
2160 [#]line __oline__ "configure"
2163 // NB: _Atomic_word not necessarily int.
2164 typedef int atomic_type;
2167 const atomic_type c3(0);
2168 if (__sync_fetch_and_add(&c1, c2) == c3)
2175 old_CXXFLAGS="$CXXFLAGS"
2177 if AC_TRY_EVAL(ac_compile); then
2178 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2179 enable_atomic_builtins=no
2181 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2182 [Define if builtin atomic operations are supported on this host.])
2183 enable_atomic_builtins=yes
2184 atomicity_dir=cpu/generic/atomicity_builtins
2187 CXXFLAGS="$old_CXXFLAGS"
2190 # Now, if still generic, set to mutex.
2191 if test $atomicity_dir = "cpu/generic" ; then
2192 atomicity_dir=cpu/generic/atomicity_mutex
2195 AC_MSG_RESULT($enable_atomic_builtins)
2200 dnl Check for exception handling support. If an explicit enable/disable
2201 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2202 dnl target may or may not support call frame exceptions.
2204 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2205 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2206 dnl Neither one forces an attempt at detection.
2209 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2211 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2212 AC_MSG_CHECKING([for exception model to use])
2215 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2216 [force use of builtin_setjmp for exceptions],
2217 [permit yes|no|auto])
2219 if test $enable_sjlj_exceptions = auto; then
2220 # Botheration. Now we've got to detect the exception model. Link tests
2221 # against libgcc.a are problematic since we've not been given proper -L
2222 # bits for single-tree newlib and libgloss.
2224 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2225 cat > conftest.$ac_ext << EOF
2226 [#]line __oline__ "configure"
2235 old_CXXFLAGS="$CXXFLAGS"
2237 if AC_TRY_EVAL(ac_compile); then
2238 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2239 enable_sjlj_exceptions=yes
2240 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2241 enable_sjlj_exceptions=no
2242 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2243 enable_sjlj_exceptions=no
2246 CXXFLAGS="$old_CXXFLAGS"
2250 # This is a tad weird, for hysterical raisins. We have to map
2251 # enable/disable to two different models.
2252 case $enable_sjlj_exceptions in
2254 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2255 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2256 ac_exception_model_name=sjlj
2259 ac_exception_model_name="call frame"
2262 AC_MSG_ERROR([unable to detect exception model])
2266 AC_MSG_RESULT($ac_exception_model_name)
2271 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2273 dnl --enable-visibility enables attempt to use visibility attributes.
2274 dnl --disable-visibility turns off all use of visibility attributes.
2275 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2276 dnl Where DEFAULT is 'yes'.
2278 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2279 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2281 if test x$enable_visibility = xyes ; then
2282 dnl all hail libgfortran
2283 dnl Check whether the target supports hidden visibility.
2284 AC_CACHE_CHECK([whether the target supports hidden visibility],
2285 have_attribute_visibility, [
2286 save_CFLAGS="$CFLAGS"
2287 CFLAGS="$CFLAGS -Werror"
2288 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2289 [], have_attribute_visibility=yes,
2290 have_attribute_visibility=no)
2291 CFLAGS="$save_CFLAGS"])
2292 if test $have_attribute_visibility = no; then
2293 enable_visibility=no
2297 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2298 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2303 dnl Add version tags to symbols in shared library (or not), additionally
2304 dnl marking other symbols as private/local (or not).
2306 dnl --enable-symvers=style adds a version script to the linker call when
2307 dnl creating the shared library. The choice of version script is
2308 dnl controlled by 'style'.
2309 dnl --disable-symvers does not.
2310 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2311 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2312 dnl choose a default style based on linker characteristics. Passing
2313 dnl 'no' disables versioning.
2315 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2317 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2318 [enables symbol versioning of the shared library],
2319 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2321 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2322 # don't know enough about $LD to do tricks...
2323 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2325 # Turn a 'yes' into a suitable default.
2326 if test x$enable_symvers = xyes ; then
2327 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2330 if test $with_gnu_ld = yes ; then
2333 case ${target_os} in
2335 enable_symvers=darwin ;;
2337 enable_symvers=no ;;
2343 # Check to see if 'darwin' or 'darwin-export' can win.
2344 if test x$enable_symvers = xdarwin-export ; then
2345 enable_symvers=darwin
2348 # Check to see if 'gnu' can win.
2349 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2350 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2351 AC_MSG_CHECKING([for shared libgcc])
2352 ac_save_CFLAGS="$CFLAGS"
2354 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2355 CFLAGS="$ac_save_CFLAGS"
2356 if test $glibcxx_shared_libgcc = no; then
2357 cat > conftest.c <<EOF
2358 int main (void) { return 0; }
2361 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2362 -shared -shared-libgcc -o conftest.so \
2363 conftest.c -v 2>&1 >/dev/null \
2364 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2366 rm -f conftest.c conftest.so
2367 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2368 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2369 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2370 CFLAGS="$ac_save_CFLAGS"
2373 AC_MSG_RESULT($glibcxx_shared_libgcc)
2375 # For GNU ld, we need at least this version. The format is described in
2376 # GLIBCXX_CHECK_LINKER_FEATURES above.
2377 glibcxx_min_gnu_ld_version=21400
2379 # If no shared libgcc, can't win.
2380 if test $glibcxx_shared_libgcc != yes; then
2381 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2382 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2383 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2385 elif test $with_gnu_ld != yes ; then
2387 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2388 AC_MSG_WARN([=== you are not using the GNU linker.])
2389 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2391 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2392 # The right tools, the right setup, but too old. Fallbacks?
2393 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2394 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2395 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2396 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2397 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2402 # Everything parsed; figure out what file to use.
2403 case $enable_symvers in
2405 SYMVER_FILE=config/abi/pre/none.ver
2408 SYMVER_FILE=config/abi/pre/gnu.ver
2409 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2410 [Define to use GNU versioning in the shared library.])
2412 gnu-versioned-namespace)
2413 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2414 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2415 [Define to use GNU namespace versioning in the shared library.])
2418 SYMVER_FILE=config/abi/pre/gnu.ver
2419 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2420 [Define to use darwin versioning in the shared library.])
2424 if test x$enable_symvers != xno ; then
2425 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2426 [Define to use symbol versioning in the shared library.])
2429 AC_SUBST(SYMVER_FILE)
2430 AC_SUBST(port_specific_symbol_files)
2431 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2432 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2433 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2434 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2435 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2437 # Now, set up compatibility support, if any.
2438 # In addition, need this to deal with std::size_t mangling in
2439 # src/compatibility.cc. In a perfect world, could use
2440 # typeid(std::size_t).name()[0] to do direct substitution.
2441 AC_MSG_CHECKING([for size_t as unsigned int])
2442 ac_save_CFLAGS="$CFLAGS"
2444 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2445 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2446 CFLAGS=$ac_save_CFLAGS
2447 if test "$glibcxx_size_t_is_i" = yes; then
2448 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2450 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2452 AC_MSG_CHECKING([for ptrdiff_t as int])
2453 ac_save_CFLAGS="$CFLAGS"
2455 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2456 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2457 CFLAGS=$ac_save_CFLAGS
2458 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2459 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2461 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2466 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2467 dnl We must stage the required headers so that they will be installed
2468 dnl with the library (unlike libgcc, the STL implementation is provided
2469 dnl solely within headers). Since we must not inject random user-space
2470 dnl macro names into user-provided C++ code, we first stage into <file>-in
2471 dnl and process to <file> with an output command. The reason for a two-
2472 dnl stage process here is to correctly handle $srcdir!=$objdir without
2473 dnl having to write complex code (the sed commands to clean the macro
2474 dnl namespace are complex and fragile enough as it is). We must also
2475 dnl add a relative path so that -I- is supported properly.
2478 dnl glibcxx_thread_h
2481 dnl HAVE_GTHR_DEFAULT
2483 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2484 AC_MSG_CHECKING([for thread model used by GCC])
2485 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2486 AC_MSG_RESULT([$target_thread_file])
2488 if test $target_thread_file != single; then
2489 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2490 [Define if gthr-default.h exists
2491 (meaning that threading support is enabled).])
2494 glibcxx_thread_h=gthr-$target_thread_file.h
2496 dnl Check for __GTHREADS define.
2497 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2498 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2504 AC_SUBST(glibcxx_thread_h)
2508 # Check whether LC_MESSAGES is available in <locale.h>.
2509 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2511 # This file file be copied and used freely without restrictions. It can
2512 # be used in projects which are not available under the GNU Public License
2513 # but which still want to provide support for the GNU gettext functionality.
2514 # Please note that the actual code is *not* freely available.
2517 AC_DEFUN([AC_LC_MESSAGES], [
2518 AC_CHECK_HEADER(locale.h, [
2519 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2520 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2521 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2522 if test $ac_cv_val_LC_MESSAGES = yes; then
2523 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2524 [Define if LC_MESSAGES is available in <locale.h>.])
2529 # Macros from the top-level gcc directory.
2530 m4_include([../config/tls.m4])