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 -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
767 # undefined and fake C99 facilities - like pre-standard snprintf - may be
768 # spuriously enabled.
769 # Long term, -std=c++0x could be even better, could manage to explicitely
770 # request C99 facilities to the underlying C headers.
771 ac_save_CXXFLAGS="$CXXFLAGS"
772 CXXFLAGS="$CXXFLAGS -std=c++98"
774 ac_save_gcc_no_link="$gcc_no_link"
776 if test x$gcc_no_link != xyes; then
777 # Use -fno-exceptions to that the C driver can link these tests without
778 # hitting undefined references to personality routines.
779 CXXFLAGS="$CXXFLAGS -fno-exceptions"
780 AC_CHECK_LIB(m, sin, [
783 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
788 # Check for the existence of <math.h> functions used if C99 is enabled.
789 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
790 AC_CACHE_VAL(ac_c99_math, [
791 GCC_TRY_COMPILE_OR_LINK(
793 volatile double d1, d2;
801 i = isgreater(d1, d2);
802 i = isgreaterequal(d1, d2);
804 i = islessequal(d1, d2);
805 i = islessgreater(d1, d2);
806 i = islessgreater(d1, d2);
807 i = isunordered(d1, d2);
808 ],[ac_c99_math=yes], [ac_c99_math=no])
810 AC_MSG_RESULT($ac_c99_math)
811 if test x"$ac_c99_math" = x"yes"; then
812 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
813 [Define if C99 functions or macros in <math.h> should be imported
814 in <cmath> in namespace std.])
817 # Check for the existence of <complex.h> complex math functions.
818 # This is necessary even though libstdc++ uses the builtin versions
819 # of these functions, because if the builtin cannot be used, a reference
820 # to the library function is emitted.
821 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
822 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
824 if test x"$ac_has_complex_h" = x"yes"; then
825 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
826 GCC_TRY_COMPILE_OR_LINK(
827 [#include <complex.h>
828 typedef __complex__ float float_type;
829 typedef __complex__ double double_type;
830 typedef __complex__ long double ld_type;
831 volatile float_type tmpf;
832 volatile double_type tmpd;
833 volatile ld_type tmpld;
836 volatile long double ld;],
848 tmpf = cpowf(tmpf, tmpf);
860 tmpd = cpow(tmpd, tmpd);
863 tmpld = ccosl(tmpld);
864 tmpld = ccoshl(tmpld);
865 tmpld = cexpl(tmpld);
866 tmpld = clogl(tmpld);
867 tmpld = csinl(tmpld);
868 tmpld = csinhl(tmpld);
869 tmpld = csqrtl(tmpld);
870 tmpld = ctanl(tmpld);
871 tmpld = ctanhl(tmpld);
872 tmpld = cpowl(tmpld, tmpld);
873 ],[ac_c99_complex=yes], [ac_c99_complex=no])
875 AC_MSG_RESULT($ac_c99_complex)
876 if test x"$ac_c99_complex" = x"yes"; then
877 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
878 [Define if C99 functions in <complex.h> should be used in
879 <complex>. Using compiler builtins for these functions requires
880 corresponding C99 library functions to be present.])
883 # Check for the existence in <stdio.h> of vscanf, et. al.
884 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
885 AC_CACHE_VAL(ac_c99_stdio, [
886 GCC_TRY_COMPILE_OR_LINK(
889 void foo(char* fmt, ...)
891 va_list args; va_start(args, fmt);
892 vfscanf(stderr, "%i", args);
894 vsnprintf(fmt, 0, "%i", args);
895 vsscanf(fmt, "%i", args);
897 [snprintf("12", 0, "%i");],
898 [ac_c99_stdio=yes], [ac_c99_stdio=no])
900 AC_MSG_RESULT($ac_c99_stdio)
902 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
903 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
904 AC_CACHE_VAL(ac_c99_stdlib, [
905 GCC_TRY_COMPILE_OR_LINK(
908 volatile long double ld;
909 volatile unsigned long long ll;
912 f = strtof("gnu", &tmp);
913 ld = strtold("gnu", &tmp);
914 ll = strtoll("gnu", &tmp, 10);
915 ll = strtoull("gnu", &tmp, 10);
917 mydivt = lldiv(10,1);
922 ],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
924 AC_MSG_RESULT($ac_c99_stdlib)
926 # Check for the existence in <wchar.h> of wcstold, etc.
928 if test x"$ac_has_wchar_h" = xyes &&
929 test x"$ac_has_wctype_h" = xyes; then
930 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
931 AC_TRY_COMPILE([#include <wchar.h>
938 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
940 # Checks for wide character functions that may not be present.
941 # Injection of these is wrapped with guard macros.
942 # NB: only put functions here, instead of immediately above, if
943 # absolutely necessary.
944 AC_TRY_COMPILE([#include <wchar.h>
945 namespace test { using ::vfwscanf; } ], [],
946 [AC_DEFINE(HAVE_VFWSCANF,1,
947 [Defined if vfwscanf exists.])],[])
949 AC_TRY_COMPILE([#include <wchar.h>
950 namespace test { using ::vswscanf; } ], [],
951 [AC_DEFINE(HAVE_VSWSCANF,1,
952 [Defined if vswscanf exists.])],[])
954 AC_TRY_COMPILE([#include <wchar.h>
955 namespace test { using ::vwscanf; } ], [],
956 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
958 AC_TRY_COMPILE([#include <wchar.h>
959 namespace test { using ::wcstof; } ], [],
960 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
962 AC_TRY_COMPILE([#include <wctype.h>],
963 [ wint_t t; int i = iswblank(t);],
964 [AC_DEFINE(HAVE_ISWBLANK,1,
965 [Defined if iswblank exists.])],[])
967 AC_MSG_RESULT($ac_c99_wchar)
970 # Option parsed, now set things appropriately.
971 if test x"$ac_c99_math" = x"no" ||
972 test x"$ac_c99_complex" = x"no" ||
973 test x"$ac_c99_stdio" = x"no" ||
974 test x"$ac_c99_stdlib" = x"no" ||
975 test x"$ac_c99_wchar" = x"no"; then
978 AC_DEFINE(_GLIBCXX_USE_C99, 1,
979 [Define if C99 functions or macros from <wchar.h>, <math.h>,
980 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
983 gcc_no_link="$ac_save_gcc_no_link"
985 CXXFLAGS="$ac_save_CXXFLAGS"
989 AC_MSG_CHECKING([for fully enabled ISO C99 support])
990 AC_MSG_RESULT($enable_c99)
995 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
996 dnl facilities in Chapter 8, "C compatibility".
998 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1003 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1004 # undefined and fake C99 facilities may be spuriously enabled.
1005 ac_save_CXXFLAGS="$CXXFLAGS"
1006 CXXFLAGS="$CXXFLAGS -std=c++98"
1008 # Check for the existence of <complex.h> complex math functions used
1010 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1011 ac_c99_complex_tr1=no;
1012 if test x"$ac_has_complex_h" = x"yes"; then
1013 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1014 AC_TRY_COMPILE([#include <complex.h>],
1015 [typedef __complex__ float float_type; float_type tmpf;
1022 typedef __complex__ double double_type; double_type tmpd;
1029 typedef __complex__ long double ld_type; ld_type tmpld;
1036 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1038 AC_MSG_RESULT($ac_c99_complex_tr1)
1039 if test x"$ac_c99_complex_tr1" = x"yes"; then
1040 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1041 [Define if C99 functions in <complex.h> should be used in
1042 <tr1/complex>. Using compiler builtins for these functions
1043 requires corresponding C99 library functions to be present.])
1046 # Check for the existence of <ctype.h> functions.
1047 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1048 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1049 AC_TRY_COMPILE([#include <ctype.h>],
1053 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1055 AC_MSG_RESULT($ac_c99_ctype_tr1)
1056 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1057 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1058 [Define if C99 functions in <ctype.h> should be imported in
1059 <tr1/cctype> in namespace std::tr1.])
1062 # Check for the existence of <fenv.h> functions.
1063 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1065 if test x"$ac_has_fenv_h" = x"yes"; then
1066 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1067 AC_TRY_COMPILE([#include <fenv.h>],
1072 ret = feclearexcept(except);
1073 ret = fegetexceptflag(pflag, except);
1074 ret = feraiseexcept(except);
1075 ret = fesetexceptflag(pflag, except);
1076 ret = fetestexcept(except);
1078 ret = fesetround(mode);
1079 ret = fegetenv(penv);
1080 ret = feholdexcept(penv);
1081 ret = fesetenv(penv);
1082 ret = feupdateenv(penv);
1083 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1085 AC_MSG_RESULT($ac_c99_fenv_tr1)
1086 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1087 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1088 [Define if C99 functions in <fenv.h> should be imported in
1089 <tr1/cfenv> in namespace std::tr1.])
1092 # Check for the existence of <stdint.h> types.
1093 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1094 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1095 AC_TRY_COMPILE([#include <stdint.h>],
1096 [typedef int8_t my_int8_t;
1097 typedef int16_t my_int16_t;
1098 typedef int32_t my_int32_t;
1099 typedef int64_t my_int64_t;
1100 typedef int_fast8_t my_int_fast8_t;
1101 typedef int_fast16_t my_int_fast16_t;
1102 typedef int_fast32_t my_int_fast32_t;
1103 typedef int_fast64_t my_int_fast64_t;
1104 typedef int_least8_t my_int_least8_t;
1105 typedef int_least16_t my_int_least16_t;
1106 typedef int_least32_t my_int_least32_t;
1107 typedef int_least64_t my_int_least64_t;
1108 typedef intmax_t my_intmax_t;
1109 typedef intptr_t my_intptr_t;
1110 typedef uint8_t my_uint8_t;
1111 typedef uint16_t my_uint16_t;
1112 typedef uint32_t my_uint32_t;
1113 typedef uint64_t my_uint64_t;
1114 typedef uint_fast8_t my_uint_fast8_t;
1115 typedef uint_fast16_t my_uint_fast16_t;
1116 typedef uint_fast32_t my_uint_fast32_t;
1117 typedef uint_fast64_t my_uint_fast64_t;
1118 typedef uint_least8_t my_uint_least8_t;
1119 typedef uint_least16_t my_uint_least16_t;
1120 typedef uint_least32_t my_uint_least32_t;
1121 typedef uint_least64_t my_uint_least64_t;
1122 typedef uintmax_t my_uintmax_t;
1123 typedef uintptr_t my_uintptr_t;
1124 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1126 AC_MSG_RESULT($ac_c99_stdint_tr1)
1127 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1128 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1129 [Define if C99 types in <stdint.h> should be imported in
1130 <tr1/cstdint> in namespace std::tr1.])
1133 # Check for the existence of <math.h> functions.
1134 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1135 AC_CACHE_VAL(ac_c99_math_tr1, [
1136 AC_TRY_COMPILE([#include <math.h>],
1137 [typedef double_t my_double_t;
1138 typedef float_t my_float_t;
1152 copysignf(0.0f, 0.0f);
1153 copysignl(0.0l, 0.0l);
1170 fmaf(0.0f, 0.0f, 0.0f);
1171 fmal(0.0l, 0.0l, 0.0l);
1214 nextafter(0.0, 0.0);
1215 nextafterf(0.0f, 0.0f);
1216 nextafterl(0.0l, 0.0l);
1217 nexttoward(0.0, 0.0);
1218 nexttowardf(0.0f, 0.0f);
1219 nexttowardl(0.0l, 0.0l);
1220 remainder(0.0, 0.0);
1221 remainderf(0.0f, 0.0f);
1222 remainderl(0.0l, 0.0l);
1223 remquo(0.0, 0.0, 0);
1224 remquo(0.0f, 0.0f, 0);
1225 remquo(0.0l, 0.0l, 0);
1244 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1246 AC_MSG_RESULT($ac_c99_math_tr1)
1247 if test x"$ac_c99_math_tr1" = x"yes"; then
1248 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1249 [Define if C99 functions or macros in <math.h> should be imported
1250 in <tr1/cmath> in namespace std::tr1.])
1253 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1254 # sense if the previous check fails, per C99, 7.8/1).
1255 ac_c99_inttypes_tr1=no;
1256 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1257 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1258 AC_TRY_COMPILE([#include <inttypes.h>],
1259 [intmax_t i, numer, denom, base;
1262 intmax_t ret = imaxabs(i);
1263 imaxdiv_t dret = imaxdiv(numer, denom);
1264 ret = strtoimax(s, endptr, base);
1265 uintmax_t uret = strtoumax(s, endptr, base);
1266 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1268 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1269 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1270 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1271 [Define if C99 functions in <inttypes.h> should be imported in
1272 <tr1/cinttypes> in namespace std::tr1.])
1275 # Check for the existence of the <stdbool.h> header.
1276 AC_CHECK_HEADERS(stdbool.h)
1278 CXXFLAGS="$ac_save_CXXFLAGS"
1283 dnl Check whether "dev/random" and "dev/urandom" are available for the
1284 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1286 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1288 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1289 AC_CACHE_VAL(ac_random_tr1, [
1290 AC_TRY_RUN([#include <stdio.h>
1293 return !(fopen("/dev/random", "r")
1294 && fopen("/dev/urandom", "r"));
1297 [ac_random_tr1=yes], [ac_random_tr1=no],
1300 AC_MSG_RESULT($ac_random_tr1)
1301 if test x"$ac_random_tr1" = x"yes"; then
1302 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1303 [Define if dev/random and dev/urandom are available for
1304 the random_device of TR1 (Chapter 5.1).])
1310 dnl Check whether macros, etc are present for <system_error>
1312 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1314 AC_MSG_CHECKING([for EOWNERDEAD])
1315 AC_CACHE_VAL(ac_system_error1, [
1316 AC_TRY_COMPILE([#include <errno.h>], [ int i = EOWNERDEAD; ],
1317 [ac_system_error1=yes], [ac_system_error1=no])
1319 AC_MSG_RESULT($ac_system_error1)
1320 if test x"$ac_system_error1" = x"yes"; then
1321 AC_DEFINE(HAVE_EOWNERDEAD, 1, [Define if EOWNERDEAD exists.])
1324 AC_MSG_CHECKING([for ENOTRECOVERABLE])
1325 AC_CACHE_VAL(ac_system_error2, [
1326 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOTRECOVERABLE; ],
1327 [ac_system_error2=yes], [ac_system_error2=no])
1329 AC_MSG_RESULT($ac_system_error2)
1330 if test x"$ac_system_error2" = x"yes"; then
1331 AC_DEFINE(HAVE_ENOTRECOVERABLE, 1, [Define if ENOTRECOVERABLE exists.])
1334 AC_MSG_CHECKING([for ENOLINK])
1335 AC_CACHE_VAL(ac_system_error3, [
1336 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOLINK; ],
1337 [ac_system_error3=yes], [ac_system_error3=no])
1339 AC_MSG_RESULT($ac_system_error3)
1340 if test x"$ac_system_error3" = x"yes"; then
1341 AC_DEFINE(HAVE_ENOLINK, 1, [Define if ENOLINK exists.])
1344 AC_MSG_CHECKING([for EPROTO])
1345 AC_CACHE_VAL(ac_system_error_4, [
1346 AC_TRY_COMPILE([#include <errno.h>], [ int i = EPROTO; ],
1347 [ac_system_error_4=yes], [ac_system_error_4=no])
1349 AC_MSG_RESULT($ac_system_error_4)
1350 if test x"$ac_system_error_4" = x"yes"; then
1351 AC_DEFINE(HAVE_EPROTO, 1, [Define if EPROTO exists.])
1354 AC_MSG_CHECKING([for ENODATA])
1355 AC_CACHE_VAL(ac_system_error_5, [
1356 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENODATA; ],
1357 [ac_system_error_5=yes], [ac_system_error_5=no])
1359 AC_MSG_RESULT($ac_system_error_5)
1360 if test x"$ac_system_error_5" = x"yes"; then
1361 AC_DEFINE(HAVE_ENODATA, 1, [Define if ENODATA exists.])
1364 AC_MSG_CHECKING([for ENOSR])
1365 AC_CACHE_VAL(ac_system_error_6, [
1366 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSR; ],
1367 [ac_system_error_6=yes], [ac_system_error_6=no])
1369 AC_MSG_RESULT($ac_system_error_6)
1370 if test x"$ac_system_error_6" = x"yes"; then
1371 AC_DEFINE(HAVE_ENOSR, 1, [Define if ENOSR exists.])
1374 AC_MSG_CHECKING([for ENOSTR])
1375 AC_CACHE_VAL(ac_system_error_7, [
1376 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSTR; ],
1377 [ac_system_error_7=yes], [ac_system_error_7=no])
1379 AC_MSG_RESULT($ac_system_error_7)
1380 if test x"$ac_system_error_7" = x"yes"; then
1381 AC_DEFINE(HAVE_ENOSTR, 1, [Define if ENOSTR exists.])
1384 AC_MSG_CHECKING([for ETIME])
1385 AC_CACHE_VAL(ac_system_error_8, [
1386 AC_TRY_COMPILE([#include <errno.h>], [ int i = ETIME; ],
1387 [ac_system_error_8=yes], [ac_system_error_8=no])
1389 AC_MSG_RESULT($ac_system_error_8)
1390 if test x"$ac_system_error_8" = x"yes"; then
1391 AC_DEFINE(HAVE_ETIME, 1, [Define if ETIME exists.])
1394 AC_MSG_CHECKING([for sys_nerr])
1395 AC_CACHE_VAL(ac_system_error9, [
1396 AC_TRY_COMPILE([#include <errno.h> ], [ int i = sys_nerr; ],
1397 [ac_system_error9=yes], [ac_system_error9=no])
1399 AC_MSG_RESULT($ac_system_error9)
1400 if test x"$ac_system_error9" = x"yes"; then
1401 AC_DEFINE(HAVE_SYS_NERR, 1, [Define if sys_nerr exists.])
1404 AC_MSG_CHECKING([for EBADMSG])
1405 AC_CACHE_VAL(ac_system_error_10, [
1406 AC_TRY_COMPILE([#include <errno.h>], [ int i = EBADMSG; ],
1407 [ac_system_error_10=yes], [ac_system_error_10=no])
1409 AC_MSG_RESULT($ac_system_error_10)
1410 if test x"$ac_system_error_10" = x"yes"; then
1411 AC_DEFINE(HAVE_EBADMSG, 1, [Define if EBADMSG exists.])
1414 AC_MSG_CHECKING([for ECANCELED])
1415 AC_CACHE_VAL(ac_system_error_11, [
1416 AC_TRY_COMPILE([#include <errno.h>], [ int i = ECANCELED; ],
1417 [ac_system_error_11=yes], [ac_system_error_11=no])
1419 AC_MSG_RESULT($ac_system_error_11)
1420 if test x"$ac_system_error_11" = x"yes"; then
1421 AC_DEFINE(HAVE_ECANCELED, 1, [Define if ECANCELED exists.])
1424 AC_MSG_CHECKING([for EOVERFLOW])
1425 AC_CACHE_VAL(ac_system_error_12, [
1426 AC_TRY_COMPILE([#include <errno.h>], [ int i = EOVERFLOW; ],
1427 [ac_system_error_12=yes], [ac_system_error_12=no])
1429 AC_MSG_RESULT($ac_system_error_12)
1430 if test x"$ac_system_error_12" = x"yes"; then
1431 AC_DEFINE(HAVE_EOVERFLOW, 1, [Define if EOVERFLOW exists.])
1436 dnl Check for what type of C headers to use.
1438 dnl --enable-cheaders= [does stuff].
1439 dnl --disable-cheaders [does not do anything, really].
1440 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1441 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1443 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1444 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1445 [construct "C" headers for g++], [permit c|c_std|c_global])
1446 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1448 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1450 # Allow overrides to configure.host here.
1451 if test $enable_cheaders = c_global; then
1455 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1459 AC_SUBST(C_INCLUDE_DIR)
1460 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1461 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1462 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1463 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1464 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1469 dnl Check for which locale library to use. The choice is mapped to
1470 dnl a subdirectory of config/locale.
1472 dnl Default is generic.
1474 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1475 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1476 [use MODEL for target locale package],
1477 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1479 # Deal with gettext issues. Default to not using it (=no) until we detect
1480 # support for it later. Let the user turn it off via --e/d, but let that
1481 # default to on for easier handling.
1484 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1488 # Either a known packaage, or "auto"
1489 if test $enable_clocale = no || test $enable_clocale = yes; then
1492 enable_clocale_flag=$enable_clocale
1494 # Probe for locale model to use if none specified.
1495 # Default to "generic".
1496 if test $enable_clocale_flag = auto; then
1497 case ${target_os} in
1498 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1499 enable_clocale_flag=gnu
1502 enable_clocale_flag=darwin
1505 enable_clocale_flag=generic
1510 # Sanity check model, and test for special functionality.
1511 if test $enable_clocale_flag = gnu; then
1512 AC_EGREP_CPP([_GLIBCXX_ok], [
1513 #include <features.h>
1514 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1517 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1519 if test $enable_clocale = auto; then
1520 # Test for bugs early in glibc-2.2.x series
1522 #define _GNU_SOURCE 1
1525 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1526 extern __typeof(newlocale) __newlocale;
1527 extern __typeof(duplocale) __duplocale;
1528 extern __typeof(strcoll_l) __strcoll_l;
1532 const char __one[] = "Äuglein Augmen";
1533 const char __two[] = "Äuglein";
1538 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1539 loc_dup = __duplocale(loc);
1540 i = __strcoll_l(__one, __two, loc);
1541 j = __strcoll_l(__one, __two, loc_dup);
1545 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1546 [enable_clocale_flag=generic])
1549 # Set it to scream when it hurts.
1550 ac_save_CFLAGS="$CFLAGS"
1551 CFLAGS="-Wimplicit-function-declaration -Werror"
1553 # Use strxfrm_l if available.
1554 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1556 #include <locale.h>],
1557 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1558 AC_DEFINE(HAVE_STRXFRM_L, 1,
1559 [Define if strxfrm_l is available in <string.h>.]),)
1561 # Use strerror_l if available.
1562 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1564 #include <locale.h>],
1565 [__locale_t loc; strerror_l(5, loc);],
1566 AC_DEFINE(HAVE_STRERROR_L, 1,
1567 [Define if strerror_l is available in <string.h>.]),)
1569 CFLAGS="$ac_save_CFLAGS"
1572 # Perhaps use strerror_r if available, and strerror_l isn't.
1573 ac_save_CFLAGS="$CFLAGS"
1574 CFLAGS="-Wimplicit-function-declaration -Werror"
1575 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1577 #include <locale.h>],
1578 [char s[128]; strerror_r(5, s, 128);],
1579 AC_DEFINE(HAVE_STRERROR_R, 1,
1580 [Define if strerror_r is available in <string.h>.]),)
1581 CFLAGS="$ac_save_CFLAGS"
1583 # Set configure bits for specified locale package
1584 AC_MSG_CHECKING([for C locale to use])
1585 case ${enable_clocale_flag} in
1587 AC_MSG_RESULT(generic)
1589 CLOCALE_H=config/locale/generic/c_locale.h
1590 CLOCALE_CC=config/locale/generic/c_locale.cc
1591 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1592 CCOLLATE_CC=config/locale/generic/collate_members.cc
1593 CCTYPE_CC=config/locale/generic/ctype_members.cc
1594 CMESSAGES_H=config/locale/generic/messages_members.h
1595 CMESSAGES_CC=config/locale/generic/messages_members.cc
1596 CMONEY_CC=config/locale/generic/monetary_members.cc
1597 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1598 CTIME_H=config/locale/generic/time_members.h
1599 CTIME_CC=config/locale/generic/time_members.cc
1600 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1603 AC_MSG_RESULT(darwin or freebsd)
1605 CLOCALE_H=config/locale/generic/c_locale.h
1606 CLOCALE_CC=config/locale/generic/c_locale.cc
1607 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1608 CCOLLATE_CC=config/locale/generic/collate_members.cc
1609 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1610 CMESSAGES_H=config/locale/generic/messages_members.h
1611 CMESSAGES_CC=config/locale/generic/messages_members.cc
1612 CMONEY_CC=config/locale/generic/monetary_members.cc
1613 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1614 CTIME_H=config/locale/generic/time_members.h
1615 CTIME_CC=config/locale/generic/time_members.cc
1616 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1622 # Declare intention to use gettext, and add support for specific
1624 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1627 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1628 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1629 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1632 # Export the build objects.
1633 for ling in $ALL_LINGUAS; do \
1634 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1635 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1637 AC_SUBST(glibcxx_MOFILES)
1638 AC_SUBST(glibcxx_POFILES)
1640 CLOCALE_H=config/locale/gnu/c_locale.h
1641 CLOCALE_CC=config/locale/gnu/c_locale.cc
1642 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1643 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1644 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1645 CMESSAGES_H=config/locale/gnu/messages_members.h
1646 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1647 CMONEY_CC=config/locale/gnu/monetary_members.cc
1648 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1649 CTIME_H=config/locale/gnu/time_members.h
1650 CTIME_CC=config/locale/gnu/time_members.cc
1651 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1654 AC_MSG_RESULT(IEEE 1003.1)
1656 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1657 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1658 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1659 CCOLLATE_CC=config/locale/generic/collate_members.cc
1660 CCTYPE_CC=config/locale/generic/ctype_members.cc
1661 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1662 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1663 CMONEY_CC=config/locale/generic/monetary_members.cc
1664 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1665 CTIME_H=config/locale/generic/time_members.h
1666 CTIME_CC=config/locale/generic/time_members.cc
1667 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1671 # This is where the testsuite looks for locale catalogs, using the
1672 # -DLOCALEDIR define during testsuite compilation.
1673 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1674 AC_SUBST(glibcxx_localedir)
1676 # A standalone libintl (e.g., GNU libintl) may be in use.
1677 if test $USE_NLS = yes; then
1678 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1679 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1681 if test $USE_NLS = yes; then
1682 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1683 [Define if NLS translations are to be used.])
1688 AC_SUBST(CMESSAGES_H)
1689 AC_SUBST(CCODECVT_CC)
1690 AC_SUBST(CCOLLATE_CC)
1692 AC_SUBST(CMESSAGES_CC)
1694 AC_SUBST(CNUMERIC_CC)
1697 AC_SUBST(CLOCALE_CC)
1698 AC_SUBST(CLOCALE_INTERNAL_H)
1703 dnl Check for which std::allocator base class to use. The choice is
1704 dnl mapped from a subdirectory of include/ext.
1708 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1709 AC_MSG_CHECKING([for std::allocator base class])
1710 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1711 [use KIND for target std::allocator base],
1712 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1714 # If they didn't use this option switch, or if they specified --enable
1715 # with no specific model, we'll have to look for one. If they
1716 # specified --disable (???), do likewise.
1717 if test $enable_libstdcxx_allocator = no ||
1718 test $enable_libstdcxx_allocator = yes;
1720 enable_libstdcxx_allocator=auto
1723 # Either a known package, or "auto". Auto implies the default choice
1724 # for a particular platform.
1725 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1727 # Probe for host-specific support if no specific model is specified.
1729 if test $enable_libstdcxx_allocator_flag = auto; then
1730 case ${target_os} in
1731 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1732 enable_libstdcxx_allocator_flag=new
1735 enable_libstdcxx_allocator_flag=new
1739 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1742 # Set configure bits for specified locale package
1743 case ${enable_libstdcxx_allocator_flag} in
1745 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1746 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1749 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1750 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1753 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1754 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1757 ALLOCATOR_H=config/allocator/new_allocator_base.h
1758 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1761 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1762 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1766 AC_SUBST(ALLOCATOR_H)
1767 AC_SUBST(ALLOCATOR_NAME)
1772 dnl Check for whether the Boost-derived checks should be turned on.
1774 dnl --enable-concept-checks turns them on.
1775 dnl --disable-concept-checks leaves them off.
1776 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1777 dnl Where DEFAULT is either `yes' or `no'.
1779 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1780 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1781 if test $enable_concept_checks = yes; then
1782 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1783 [Define to use concept checking code from the boost libraries.])
1788 dnl Check for parallel mode pre-requisites, including OpenMP support.
1790 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1792 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1794 # NB: libstdc++ may be configured before libgomp: can't check for the actual
1795 # dependencies (omp.h and libgomp).
1797 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1798 enable_parallel=yes;
1800 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1803 # Check to see if it's explicitly disabled.
1804 # GLIBCXX_ENABLE(libgomp,$1,,[enable code depending on libgomp],
1807 # if test x$enable_libgomp = xno; then
1808 # enable_parallel=no
1811 AC_MSG_CHECKING([for parallel mode support])
1812 AC_MSG_RESULT([$enable_parallel])
1813 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1818 dnl Check for which I/O library to use: stdio, or something specific.
1820 dnl Default is stdio.
1822 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1823 AC_MSG_CHECKING([for underlying I/O to use])
1824 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1825 [use target-specific I/O package], [permit stdio])
1827 # Now that libio has been removed, you can have any color you want as long
1828 # as it's black. This is one big no-op until other packages are added, but
1829 # showing the framework never hurts.
1830 case ${enable_cstdio} in
1832 CSTDIO_H=config/io/c_io_stdio.h
1833 BASIC_FILE_H=config/io/basic_file_stdio.h
1834 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1835 AC_MSG_RESULT(stdio)
1840 AC_SUBST(BASIC_FILE_H)
1841 AC_SUBST(BASIC_FILE_CC)
1846 dnl Check for "unusual" flags to pass to the compiler while building.
1848 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1849 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1850 dnl --disable-cxx-flags passes nothing.
1851 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1852 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1853 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1854 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1855 dnl If "default flags" is an empty string, the effect is the same
1856 dnl as --disable or --enable=no.
1858 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1859 AC_MSG_CHECKING([for extra compiler flags for building])
1860 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1861 [pass compiler FLAGS when building library],
1862 [case "x$enable_cxx_flags" in
1863 xno | x) enable_cxx_flags= ;;
1865 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1868 # Run through flags (either default or command-line) and set anything
1869 # extra (e.g., #defines) that must accompany particular g++ options.
1870 if test -n "$enable_cxx_flags"; then
1871 for f in $enable_cxx_flags; do
1875 *) # and we're trying to pass /what/ exactly?
1876 AC_MSG_ERROR([compiler flags start with a -]) ;;
1881 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1882 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1883 AC_SUBST(EXTRA_CXX_FLAGS)
1888 dnl Check to see if debugging libraries are to be built.
1890 dnl --enable-libstdcxx-debug
1891 dnl builds a separate set of debugging libraries in addition to the
1892 dnl normal (shared, static) libstdc++ binaries.
1894 dnl --disable-libstdcxx-debug
1895 dnl builds only one (non-debug) version of libstdc++.
1897 dnl --enable-libstdcxx-debug-flags=FLAGS
1898 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1900 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1901 dnl Where DEFAULT is either `yes' or `no'.
1903 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1904 AC_MSG_CHECKING([for additional debug build])
1905 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1906 AC_MSG_RESULT($enable_libstdcxx_debug)
1907 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1912 dnl Check for explicit debug flags.
1914 dnl --enable-libstdcxx-debug-flags='-O1'
1915 dnl is a general method for passing flags to be used when
1916 dnl building debug libraries with --enable-debug.
1918 dnl --disable-libstdcxx-debug-flags does nothing.
1919 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1920 dnl If "default flags" is an empty string, the effect is the same
1921 dnl as --disable or --enable=no.
1923 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1924 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1925 [pass compiler FLAGS when building debug library],
1926 [case "x$enable_libstdcxx_debug_flags" in
1927 xno | x) enable_libstdcxx_debug_flags= ;;
1929 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1932 # Option parsed, now set things appropriately
1933 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1934 AC_SUBST(DEBUG_FLAGS)
1936 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1941 dnl Check if the user only wants a freestanding library implementation.
1943 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1944 dnl installing only the headers required by [17.4.1.3] and the language
1945 dnl support library. More than that will be built (to keep the Makefiles
1946 dnl conveniently clean), but not installed.
1949 dnl is_hosted (yes/no)
1952 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1954 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1955 AC_ARG_ENABLE([hosted-libstdcxx],
1956 AC_HELP_STRING([--disable-hosted-libstdcxx],
1957 [only build freestanding C++ runtime support]),,
1960 enable_hosted_libstdcxx=no
1963 enable_hosted_libstdcxx=yes
1966 if test "$enable_hosted_libstdcxx" = no; then
1967 AC_MSG_NOTICE([Only freestanding libraries will be built])
1971 enable_libstdcxx_pch=no
1976 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1977 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1978 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1983 dnl Check for template specializations for the 'long long' type.
1984 dnl The result determines only whether 'long long' I/O is enabled; things
1985 dnl like numeric_limits<> specializations are always available.
1987 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1988 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1989 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1990 dnl Where DEFAULT is either `yes' or `no'.
1992 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1993 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1994 if test $enable_long_long = yes; then
1995 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1996 [Define if code specialized for long long should be used.])
1998 AC_MSG_CHECKING([for enabled long long specializations])
1999 AC_MSG_RESULT([$enable_long_long])
2004 dnl Check for template specializations for the 'wchar_t' type.
2006 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2007 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2008 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2009 dnl Where DEFAULT is either `yes' or `no'.
2011 dnl Necessary support must also be present.
2013 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2014 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2016 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2017 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2018 AC_MSG_CHECKING([for mbstate_t])
2019 AC_TRY_COMPILE([#include <wchar.h>],
2020 [mbstate_t teststate;],
2021 have_mbstate_t=yes, have_mbstate_t=no)
2022 AC_MSG_RESULT($have_mbstate_t)
2023 if test x"$have_mbstate_t" = xyes; then
2024 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2027 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2029 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2031 if test x"$enable_wchar_t" = x"yes"; then
2036 if test x"$ac_has_wchar_h" = xyes &&
2037 test x"$ac_has_wctype_h" = xyes; then
2038 AC_TRY_COMPILE([#include <wchar.h>
2099 ],[],[], [enable_wchar_t=no])
2107 if test x"$enable_wchar_t" = x"yes"; then
2108 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2109 [Define if code specialized for wchar_t should be used.])
2112 AC_MSG_CHECKING([for enabled wchar_t specializations])
2113 AC_MSG_RESULT([$enable_wchar_t])
2118 dnl Check to see if building and using a C++ precompiled header can be done.
2120 dnl --enable-libstdcxx-pch=yes
2121 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2122 dnl may work, after some light-hearted attempts to puzzle out compiler
2123 dnl support, flip bits on in include/Makefile.am
2125 dnl --disable-libstdcxx-pch
2126 dnl turns off attempts to use or build stdc++.h.gch.
2129 dnl glibcxx_PCHFLAGS
2131 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2132 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2133 if test $enable_libstdcxx_pch = yes; then
2134 AC_CACHE_CHECK([for compiler with PCH support],
2135 [glibcxx_cv_prog_CXX_pch],
2136 [ac_save_CXXFLAGS="$CXXFLAGS"
2137 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2140 echo '#include <math.h>' > conftest.h
2141 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2142 -o conftest.h.gch 1>&5 2>&1 &&
2143 echo '#error "pch failed"' > conftest.h &&
2144 echo '#include "conftest.h"' > conftest.cc &&
2145 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2147 glibcxx_cv_prog_CXX_pch=yes
2149 glibcxx_cv_prog_CXX_pch=no
2152 CXXFLAGS=$ac_save_CXXFLAGS
2155 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2158 AC_MSG_CHECKING([for enabled PCH])
2159 AC_MSG_RESULT([$enable_libstdcxx_pch])
2161 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2162 if test $enable_libstdcxx_pch = yes; then
2163 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2167 AC_SUBST(glibcxx_PCHFLAGS)
2172 dnl Check for atomic builtins.
2174 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2176 dnl This checks to see if the host supports the compiler-generated
2177 dnl builtins for atomic operations. Note, this is intended to be an
2178 dnl all-or-nothing switch, so all the atomic operations that are used
2179 dnl should be checked.
2182 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2183 dnl see: CHECK_SYNC_FETCH_AND_ADD
2186 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
2188 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2189 AC_MSG_CHECKING([for atomic builtins])
2193 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2194 cat > conftest.$ac_ext << EOF
2195 [#]line __oline__ "configure"
2198 // NB: _Atomic_word not necessarily int.
2199 typedef int atomic_type;
2202 const atomic_type c3(0);
2203 if (__sync_fetch_and_add(&c1, c2) == c3)
2210 old_CXXFLAGS="$CXXFLAGS"
2212 if AC_TRY_EVAL(ac_compile); then
2213 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2214 enable_atomic_builtins=no
2216 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2217 [Define if builtin atomic operations are supported on this host.])
2218 enable_atomic_builtins=yes
2219 atomicity_dir=cpu/generic/atomicity_builtins
2222 CXXFLAGS="$old_CXXFLAGS"
2225 # Now, if still generic, set to mutex.
2226 if test $atomicity_dir = "cpu/generic" ; then
2227 atomicity_dir=cpu/generic/atomicity_mutex
2230 AC_MSG_RESULT($enable_atomic_builtins)
2235 dnl Check for exception handling support. If an explicit enable/disable
2236 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2237 dnl target may or may not support call frame exceptions.
2239 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2240 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2241 dnl Neither one forces an attempt at detection.
2244 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2246 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2247 AC_MSG_CHECKING([for exception model to use])
2250 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2251 [force use of builtin_setjmp for exceptions],
2252 [permit yes|no|auto])
2254 if test $enable_sjlj_exceptions = auto; then
2255 # Botheration. Now we've got to detect the exception model. Link tests
2256 # against libgcc.a are problematic since we've not been given proper -L
2257 # bits for single-tree newlib and libgloss.
2259 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2260 cat > conftest.$ac_ext << EOF
2261 [#]line __oline__ "configure"
2270 old_CXXFLAGS="$CXXFLAGS"
2272 if AC_TRY_EVAL(ac_compile); then
2273 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2274 enable_sjlj_exceptions=yes
2275 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2276 enable_sjlj_exceptions=no
2277 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2278 enable_sjlj_exceptions=no
2281 CXXFLAGS="$old_CXXFLAGS"
2285 # This is a tad weird, for hysterical raisins. We have to map
2286 # enable/disable to two different models.
2287 case $enable_sjlj_exceptions in
2289 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2290 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2291 ac_exception_model_name=sjlj
2294 ac_exception_model_name="call frame"
2297 AC_MSG_ERROR([unable to detect exception model])
2301 AC_MSG_RESULT($ac_exception_model_name)
2306 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2308 dnl --enable-visibility enables attempt to use visibility attributes.
2309 dnl --disable-visibility turns off all use of visibility attributes.
2310 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2311 dnl Where DEFAULT is 'yes'.
2313 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2314 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2316 if test x$enable_visibility = xyes ; then
2317 dnl all hail libgfortran
2318 dnl Check whether the target supports hidden visibility.
2319 AC_CACHE_CHECK([whether the target supports hidden visibility],
2320 have_attribute_visibility, [
2321 save_CFLAGS="$CFLAGS"
2322 CFLAGS="$CFLAGS -Werror"
2323 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2324 [], have_attribute_visibility=yes,
2325 have_attribute_visibility=no)
2326 CFLAGS="$save_CFLAGS"])
2327 if test $have_attribute_visibility = no; then
2328 enable_visibility=no
2332 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2333 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2338 dnl Add version tags to symbols in shared library (or not), additionally
2339 dnl marking other symbols as private/local (or not).
2341 dnl --enable-symvers=style adds a version script to the linker call when
2342 dnl creating the shared library. The choice of version script is
2343 dnl controlled by 'style'.
2344 dnl --disable-symvers does not.
2345 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2346 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2347 dnl choose a default style based on linker characteristics. Passing
2348 dnl 'no' disables versioning.
2350 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2352 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2353 [enables symbol versioning of the shared library],
2354 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2356 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2357 # don't know enough about $LD to do tricks...
2358 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2360 # Turn a 'yes' into a suitable default.
2361 if test x$enable_symvers = xyes ; then
2362 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2365 if test $with_gnu_ld = yes ; then
2368 case ${target_os} in
2370 enable_symvers=darwin ;;
2372 enable_symvers=no ;;
2378 # Check to see if 'darwin' or 'darwin-export' can win.
2379 if test x$enable_symvers = xdarwin-export ; then
2380 enable_symvers=darwin
2383 # Check to see if 'gnu' can win.
2384 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2385 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2386 AC_MSG_CHECKING([for shared libgcc])
2387 ac_save_CFLAGS="$CFLAGS"
2389 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2390 CFLAGS="$ac_save_CFLAGS"
2391 if test $glibcxx_shared_libgcc = no; then
2392 cat > conftest.c <<EOF
2393 int main (void) { return 0; }
2396 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2397 -shared -shared-libgcc -o conftest.so \
2398 conftest.c -v 2>&1 >/dev/null \
2399 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2401 rm -f conftest.c conftest.so
2402 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2403 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2404 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2405 CFLAGS="$ac_save_CFLAGS"
2408 AC_MSG_RESULT($glibcxx_shared_libgcc)
2410 # For GNU ld, we need at least this version. The format is described in
2411 # GLIBCXX_CHECK_LINKER_FEATURES above.
2412 glibcxx_min_gnu_ld_version=21400
2414 # If no shared libgcc, can't win.
2415 if test $glibcxx_shared_libgcc != yes; then
2416 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2417 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2418 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2420 elif test $with_gnu_ld != yes ; then
2422 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2423 AC_MSG_WARN([=== you are not using the GNU linker.])
2424 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2426 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2427 # The right tools, the right setup, but too old. Fallbacks?
2428 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2429 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2430 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2431 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2432 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2437 # Everything parsed; figure out what file to use.
2438 case $enable_symvers in
2440 SYMVER_FILE=config/abi/pre/none.ver
2443 SYMVER_FILE=config/abi/pre/gnu.ver
2444 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2445 [Define to use GNU versioning in the shared library.])
2447 gnu-versioned-namespace)
2448 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2449 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2450 [Define to use GNU namespace versioning in the shared library.])
2453 SYMVER_FILE=config/abi/pre/gnu.ver
2454 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2455 [Define to use darwin versioning in the shared library.])
2459 if test x$enable_symvers != xno ; then
2460 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2461 [Define to use symbol versioning in the shared library.])
2464 AC_SUBST(SYMVER_FILE)
2465 AC_SUBST(port_specific_symbol_files)
2466 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2467 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2468 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2469 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2470 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2472 # Now, set up compatibility support, if any.
2473 # In addition, need this to deal with std::size_t mangling in
2474 # src/compatibility.cc. In a perfect world, could use
2475 # typeid(std::size_t).name()[0] to do direct substitution.
2476 AC_MSG_CHECKING([for size_t as unsigned int])
2477 ac_save_CFLAGS="$CFLAGS"
2479 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2480 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2481 CFLAGS=$ac_save_CFLAGS
2482 if test "$glibcxx_size_t_is_i" = yes; then
2483 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2485 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2487 AC_MSG_CHECKING([for ptrdiff_t as int])
2488 ac_save_CFLAGS="$CFLAGS"
2490 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2491 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2492 CFLAGS=$ac_save_CFLAGS
2493 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2494 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2496 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2501 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2502 dnl We must stage the required headers so that they will be installed
2503 dnl with the library (unlike libgcc, the STL implementation is provided
2504 dnl solely within headers). Since we must not inject random user-space
2505 dnl macro names into user-provided C++ code, we first stage into <file>-in
2506 dnl and process to <file> with an output command. The reason for a two-
2507 dnl stage process here is to correctly handle $srcdir!=$objdir without
2508 dnl having to write complex code (the sed commands to clean the macro
2509 dnl namespace are complex and fragile enough as it is). We must also
2510 dnl add a relative path so that -I- is supported properly.
2513 dnl glibcxx_thread_h
2516 dnl HAVE_GTHR_DEFAULT
2518 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2519 AC_MSG_CHECKING([for thread model used by GCC])
2520 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2521 AC_MSG_RESULT([$target_thread_file])
2523 if test $target_thread_file != single; then
2524 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2525 [Define if gthr-default.h exists
2526 (meaning that threading support is enabled).])
2529 glibcxx_thread_h=gthr-$target_thread_file.h
2531 dnl Check for __GTHREADS define.
2532 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2533 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2539 AC_SUBST(glibcxx_thread_h)
2543 # Check whether LC_MESSAGES is available in <locale.h>.
2544 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2546 # This file file be copied and used freely without restrictions. It can
2547 # be used in projects which are not available under the GNU Public License
2548 # but which still want to provide support for the GNU gettext functionality.
2549 # Please note that the actual code is *not* freely available.
2552 AC_DEFUN([AC_LC_MESSAGES], [
2553 AC_CHECK_HEADER(locale.h, [
2554 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2555 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2556 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2557 if test $ac_cv_val_LC_MESSAGES = yes; then
2558 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2559 [Define if LC_MESSAGES is available in <locale.h>.])
2564 # Macros from the top-level gcc directory.
2565 m4_include([../config/tls.m4])