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="$CXXFLAGS"
770 ac_save_gcc_no_link="$gcc_no_link"
772 if test x$gcc_no_link != xyes; then
773 # Use -fno-exceptions to that the C driver can link these tests without
774 # hitting undefined references to personality routines.
775 CXXFLAGS="$CXXFLAGS -fno-exceptions"
776 AC_CHECK_LIB(m, sin, [
779 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
784 # Check for the existence of <math.h> functions used if C99 is enabled.
785 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
786 AC_CACHE_VAL(ac_c99_math, [
787 GCC_TRY_COMPILE_OR_LINK(
789 volatile double d1, d2;
797 i = isgreater(d1, d2);
798 i = isgreaterequal(d1, d2);
800 i = islessequal(d1, d2);
801 i = islessgreater(d1, d2);
802 i = islessgreater(d1, d2);
803 i = isunordered(d1, d2);
804 ],[ac_c99_math=yes], [ac_c99_math=no])
806 AC_MSG_RESULT($ac_c99_math)
807 if test x"$ac_c99_math" = x"yes"; then
808 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
809 [Define if C99 functions or macros in <math.h> should be imported
810 in <cmath> in namespace std.])
813 # Check for the existence of <complex.h> complex math functions.
814 # This is necessary even though libstdc++ uses the builtin versions
815 # of these functions, because if the builtin cannot be used, a reference
816 # to the library function is emitted.
817 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
818 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
820 if test x"$ac_has_complex_h" = x"yes"; then
821 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
822 GCC_TRY_COMPILE_OR_LINK(
823 [#include <complex.h>
824 typedef __complex__ float float_type;
825 typedef __complex__ double double_type;
826 typedef __complex__ long double ld_type;
827 volatile float_type tmpf;
828 volatile double_type tmpd;
829 volatile ld_type tmpld;
832 volatile long double ld;],
844 tmpf = cpowf(tmpf, tmpf);
856 tmpd = cpow(tmpd, tmpd);
859 tmpld = ccosl(tmpld);
860 tmpld = ccoshl(tmpld);
861 tmpld = cexpl(tmpld);
862 tmpld = clogl(tmpld);
863 tmpld = csinl(tmpld);
864 tmpld = csinhl(tmpld);
865 tmpld = csqrtl(tmpld);
866 tmpld = ctanl(tmpld);
867 tmpld = ctanhl(tmpld);
868 tmpld = cpowl(tmpld, tmpld);
869 ],[ac_c99_complex=yes], [ac_c99_complex=no])
871 AC_MSG_RESULT($ac_c99_complex)
872 if test x"$ac_c99_complex" = x"yes"; then
873 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
874 [Define if C99 functions in <complex.h> should be used in
875 <complex>. Using compiler builtins for these functions requires
876 corresponding C99 library functions to be present.])
879 # Check for the existence in <stdio.h> of vscanf, et. al.
880 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
881 AC_CACHE_VAL(ac_c99_stdio, [
882 GCC_TRY_COMPILE_OR_LINK(
885 void foo(char* fmt, ...)
887 va_list args; va_start(args, fmt);
888 vfscanf(stderr, "%i", args);
890 vsnprintf(fmt, 0, "%i", args);
891 vsscanf(fmt, "%i", args);
893 [snprintf("12", 0, "%i");],
894 [ac_c99_stdio=yes], [ac_c99_stdio=no])
896 AC_MSG_RESULT($ac_c99_stdio)
898 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
899 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
900 AC_CACHE_VAL(ac_c99_stdlib, [
901 GCC_TRY_COMPILE_OR_LINK(
904 volatile long double ld;
905 volatile unsigned long long ll;
908 f = strtof("gnu", &tmp);
909 ld = strtold("gnu", &tmp);
910 ll = strtoll("gnu", &tmp, 10);
911 ll = strtoull("gnu", &tmp, 10);
913 mydivt = lldiv(10,1);
918 ],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
920 AC_MSG_RESULT($ac_c99_stdlib)
922 # Check for the existence in <wchar.h> of wcstold, etc.
924 if test x"$ac_has_wchar_h" = xyes &&
925 test x"$ac_has_wctype_h" = xyes; then
926 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
927 AC_TRY_COMPILE([#include <wchar.h>
934 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
936 # Checks for wide character functions that may not be present.
937 # Injection of these is wrapped with guard macros.
938 # NB: only put functions here, instead of immediately above, if
939 # absolutely necessary.
940 AC_TRY_COMPILE([#include <wchar.h>
941 namespace test { using ::vfwscanf; } ], [],
942 [AC_DEFINE(HAVE_VFWSCANF,1,
943 [Defined if vfwscanf exists.])],[])
945 AC_TRY_COMPILE([#include <wchar.h>
946 namespace test { using ::vswscanf; } ], [],
947 [AC_DEFINE(HAVE_VSWSCANF,1,
948 [Defined if vswscanf exists.])],[])
950 AC_TRY_COMPILE([#include <wchar.h>
951 namespace test { using ::vwscanf; } ], [],
952 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
954 AC_TRY_COMPILE([#include <wchar.h>
955 namespace test { using ::wcstof; } ], [],
956 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
958 AC_TRY_COMPILE([#include <wctype.h>],
959 [ wint_t t; int i = iswblank(t);],
960 [AC_DEFINE(HAVE_ISWBLANK,1,
961 [Defined if iswblank exists.])],[])
963 AC_MSG_RESULT($ac_c99_wchar)
966 # Option parsed, now set things appropriately.
967 if test x"$ac_c99_math" = x"no" ||
968 test x"$ac_c99_complex" = x"no" ||
969 test x"$ac_c99_stdio" = x"no" ||
970 test x"$ac_c99_stdlib" = x"no" ||
971 test x"$ac_c99_wchar" = x"no"; then
974 AC_DEFINE(_GLIBCXX_USE_C99, 1,
975 [Define if C99 functions or macros from <wchar.h>, <math.h>,
976 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
979 gcc_no_link="$ac_save_gcc_no_link"
981 CXXFLAGS="$ac_save_CXXFLAGS"
985 AC_MSG_CHECKING([for fully enabled ISO C99 support])
986 AC_MSG_RESULT($enable_c99)
991 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
992 dnl facilities in Chapter 8, "C compatibility".
994 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
999 # Check for the existence of <complex.h> complex math functions used
1001 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1002 ac_c99_complex_tr1=no;
1003 if test x"$ac_has_complex_h" = x"yes"; then
1004 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1005 AC_TRY_COMPILE([#include <complex.h>],
1006 [typedef __complex__ float float_type; float_type tmpf;
1013 typedef __complex__ double double_type; double_type tmpd;
1020 typedef __complex__ long double ld_type; ld_type tmpld;
1027 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1029 AC_MSG_RESULT($ac_c99_complex_tr1)
1030 if test x"$ac_c99_complex_tr1" = x"yes"; then
1031 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1032 [Define if C99 functions in <complex.h> should be used in
1033 <tr1/complex>. Using compiler builtins for these functions
1034 requires corresponding C99 library functions to be present.])
1037 # Check for the existence of <ctype.h> functions.
1038 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1039 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1040 AC_TRY_COMPILE([#include <ctype.h>],
1044 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1046 AC_MSG_RESULT($ac_c99_ctype_tr1)
1047 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1048 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1049 [Define if C99 functions in <ctype.h> should be imported in
1050 <tr1/cctype> in namespace std::tr1.])
1053 # Check for the existence of <fenv.h> functions.
1054 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1056 if test x"$ac_has_fenv_h" = x"yes"; then
1057 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1058 AC_TRY_COMPILE([#include <fenv.h>],
1063 ret = feclearexcept(except);
1064 ret = fegetexceptflag(pflag, except);
1065 ret = feraiseexcept(except);
1066 ret = fesetexceptflag(pflag, except);
1067 ret = fetestexcept(except);
1069 ret = fesetround(mode);
1070 ret = fegetenv(penv);
1071 ret = feholdexcept(penv);
1072 ret = fesetenv(penv);
1073 ret = feupdateenv(penv);
1074 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1076 AC_MSG_RESULT($ac_c99_fenv_tr1)
1077 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1078 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1079 [Define if C99 functions in <fenv.h> should be imported in
1080 <tr1/cfenv> in namespace std::tr1.])
1083 # Check for the existence of <stdint.h> types.
1084 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1085 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1086 AC_TRY_COMPILE([#include <stdint.h>],
1087 [typedef int8_t my_int8_t;
1088 typedef int16_t my_int16_t;
1089 typedef int32_t my_int32_t;
1090 typedef int64_t my_int64_t;
1091 typedef int_fast8_t my_int_fast8_t;
1092 typedef int_fast16_t my_int_fast16_t;
1093 typedef int_fast32_t my_int_fast32_t;
1094 typedef int_fast64_t my_int_fast64_t;
1095 typedef int_least8_t my_int_least8_t;
1096 typedef int_least16_t my_int_least16_t;
1097 typedef int_least32_t my_int_least32_t;
1098 typedef int_least64_t my_int_least64_t;
1099 typedef intmax_t my_intmax_t;
1100 typedef intptr_t my_intptr_t;
1101 typedef uint8_t my_uint8_t;
1102 typedef uint16_t my_uint16_t;
1103 typedef uint32_t my_uint32_t;
1104 typedef uint64_t my_uint64_t;
1105 typedef uint_fast8_t my_uint_fast8_t;
1106 typedef uint_fast16_t my_uint_fast16_t;
1107 typedef uint_fast32_t my_uint_fast32_t;
1108 typedef uint_fast64_t my_uint_fast64_t;
1109 typedef uint_least8_t my_uint_least8_t;
1110 typedef uint_least16_t my_uint_least16_t;
1111 typedef uint_least32_t my_uint_least32_t;
1112 typedef uint_least64_t my_uint_least64_t;
1113 typedef uintmax_t my_uintmax_t;
1114 typedef uintptr_t my_uintptr_t;
1115 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1117 AC_MSG_RESULT($ac_c99_stdint_tr1)
1118 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1119 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1120 [Define if C99 types in <stdint.h> should be imported in
1121 <tr1/cstdint> in namespace std::tr1.])
1124 # Check for the existence of <math.h> functions.
1125 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1126 AC_CACHE_VAL(ac_c99_math_tr1, [
1127 AC_TRY_COMPILE([#include <math.h>],
1128 [typedef double_t my_double_t;
1129 typedef float_t my_float_t;
1143 copysignf(0.0f, 0.0f);
1144 copysignl(0.0l, 0.0l);
1161 fmaf(0.0f, 0.0f, 0.0f);
1162 fmal(0.0l, 0.0l, 0.0l);
1205 nextafter(0.0, 0.0);
1206 nextafterf(0.0f, 0.0f);
1207 nextafterl(0.0l, 0.0l);
1208 nexttoward(0.0, 0.0);
1209 nexttowardf(0.0f, 0.0f);
1210 nexttowardl(0.0l, 0.0l);
1211 remainder(0.0, 0.0);
1212 remainderf(0.0f, 0.0f);
1213 remainderl(0.0l, 0.0l);
1214 remquo(0.0, 0.0, 0);
1215 remquo(0.0f, 0.0f, 0);
1216 remquo(0.0l, 0.0l, 0);
1235 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1237 AC_MSG_RESULT($ac_c99_math_tr1)
1238 if test x"$ac_c99_math_tr1" = x"yes"; then
1239 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1240 [Define if C99 functions or macros in <math.h> should be imported
1241 in <tr1/cmath> in namespace std::tr1.])
1244 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1245 # sense if the previous check fails, per C99, 7.8/1).
1246 ac_c99_inttypes_tr1=no;
1247 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1248 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1249 AC_TRY_COMPILE([#include <inttypes.h>],
1250 [intmax_t i, numer, denom, base;
1253 intmax_t ret = imaxabs(i);
1254 imaxdiv_t dret = imaxdiv(numer, denom);
1255 ret = strtoimax(s, endptr, base);
1256 uintmax_t uret = strtoumax(s, endptr, base);
1257 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1259 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1260 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1261 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1262 [Define if C99 functions in <inttypes.h> should be imported in
1263 <tr1/cinttypes> in namespace std::tr1.])
1266 # Check for the existence of the <stdbool.h> header.
1267 AC_CHECK_HEADERS(stdbool.h)
1273 dnl Check whether "dev/random" and "dev/urandom" are available for the
1274 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1276 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1278 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1279 AC_CACHE_VAL(ac_random_tr1, [
1280 AC_TRY_RUN([#include <stdio.h>
1283 return !(fopen("/dev/random", "r")
1284 && fopen("/dev/urandom", "r"));
1287 [ac_random_tr1=yes], [ac_random_tr1=no],
1290 AC_MSG_RESULT($ac_random_tr1)
1291 if test x"$ac_random_tr1" = x"yes"; then
1292 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1293 [Define if dev/random and dev/urandom are available for
1294 the random_device of TR1 (Chapter 5.1).])
1300 dnl Check whether macros, etc are present for <system_error>
1302 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1304 AC_MSG_CHECKING([for EOWNERDEAD])
1305 AC_CACHE_VAL(ac_system_error1, [
1306 AC_TRY_COMPILE([#include <errno.h>], [ int i = EOWNERDEAD; ],
1307 [ac_system_error1=yes], [ac_system_error1=no])
1309 AC_MSG_RESULT($ac_system_error1)
1310 if test x"$ac_system_error1" = x"yes"; then
1311 AC_DEFINE(HAVE_EOWNERDEAD, 1, [Define if EOWNERDEAD exists.])
1314 AC_MSG_CHECKING([for ENOTRECOVERABLE])
1315 AC_CACHE_VAL(ac_system_error2, [
1316 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOTRECOVERABLE; ],
1317 [ac_system_error2=yes], [ac_system_error2=no])
1319 AC_MSG_RESULT($ac_system_error2)
1320 if test x"$ac_system_error2" = x"yes"; then
1321 AC_DEFINE(HAVE_ENOTRECOVERABLE, 1, [Define if ENOTRECOVERABLE exists.])
1324 AC_MSG_CHECKING([for ENOLINK])
1325 AC_CACHE_VAL(ac_system_error3, [
1326 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOLINK; ],
1327 [ac_system_error3=yes], [ac_system_error3=no])
1329 AC_MSG_RESULT($ac_system_error3)
1330 if test x"$ac_system_error3" = x"yes"; then
1331 AC_DEFINE(HAVE_ENOLINK, 1, [Define if ENOLINK exists.])
1334 AC_MSG_CHECKING([for EPROTO])
1335 AC_CACHE_VAL(ac_system_error_4, [
1336 AC_TRY_COMPILE([#include <errno.h>], [ int i = EPROTO; ],
1337 [ac_system_error_4=yes], [ac_system_error_4=no])
1339 AC_MSG_RESULT($ac_system_error_4)
1340 if test x"$ac_system_error_4" = x"yes"; then
1341 AC_DEFINE(HAVE_EPROTO, 1, [Define if EPROTO exists.])
1344 AC_MSG_CHECKING([for ENODATA])
1345 AC_CACHE_VAL(ac_system_error_5, [
1346 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENODATA; ],
1347 [ac_system_error_5=yes], [ac_system_error_5=no])
1349 AC_MSG_RESULT($ac_system_error_5)
1350 if test x"$ac_system_error_5" = x"yes"; then
1351 AC_DEFINE(HAVE_ENODATA, 1, [Define if ENODATA exists.])
1354 AC_MSG_CHECKING([for ENOSR])
1355 AC_CACHE_VAL(ac_system_error_6, [
1356 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSR; ],
1357 [ac_system_error_6=yes], [ac_system_error_6=no])
1359 AC_MSG_RESULT($ac_system_error_6)
1360 if test x"$ac_system_error_6" = x"yes"; then
1361 AC_DEFINE(HAVE_ENOSR, 1, [Define if ENOSR exists.])
1364 AC_MSG_CHECKING([for ENOSTR])
1365 AC_CACHE_VAL(ac_system_error_7, [
1366 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSTR; ],
1367 [ac_system_error_7=yes], [ac_system_error_7=no])
1369 AC_MSG_RESULT($ac_system_error_7)
1370 if test x"$ac_system_error_7" = x"yes"; then
1371 AC_DEFINE(HAVE_ENOSTR, 1, [Define if ENOSTR exists.])
1374 AC_MSG_CHECKING([for ETIME])
1375 AC_CACHE_VAL(ac_system_error_8, [
1376 AC_TRY_COMPILE([#include <errno.h>], [ int i = ETIME; ],
1377 [ac_system_error_8=yes], [ac_system_error_8=no])
1379 AC_MSG_RESULT($ac_system_error_8)
1380 if test x"$ac_system_error_8" = x"yes"; then
1381 AC_DEFINE(HAVE_ETIME, 1, [Define if ETIME exists.])
1384 AC_MSG_CHECKING([for sys_nerr])
1385 AC_CACHE_VAL(ac_system_error9, [
1386 AC_TRY_COMPILE([#include <errno.h> ], [ int i = sys_nerr; ],
1387 [ac_system_error9=yes], [ac_system_error9=no])
1389 AC_MSG_RESULT($ac_system_error9)
1390 if test x"$ac_system_error9" = x"yes"; then
1391 AC_DEFINE(HAVE_SYS_NERR, 1, [Define if sys_nerr exists.])
1394 AC_MSG_CHECKING([for EBADMSG])
1395 AC_CACHE_VAL(ac_system_error_10, [
1396 AC_TRY_COMPILE([#include <errno.h>], [ int i = EBADMSG; ],
1397 [ac_system_error_10=yes], [ac_system_error_10=no])
1399 AC_MSG_RESULT($ac_system_error_10)
1400 if test x"$ac_system_error_10" = x"yes"; then
1401 AC_DEFINE(HAVE_EBADMSG, 1, [Define if EBADMSG exists.])
1404 AC_MSG_CHECKING([for ECANCELED])
1405 AC_CACHE_VAL(ac_system_error_11, [
1406 AC_TRY_COMPILE([#include <errno.h>], [ int i = ECANCELED; ],
1407 [ac_system_error_11=yes], [ac_system_error_11=no])
1409 AC_MSG_RESULT($ac_system_error_11)
1410 if test x"$ac_system_error_11" = x"yes"; then
1411 AC_DEFINE(HAVE_ECANCELED, 1, [Define if ECANCELED exists.])
1416 dnl Check for what type of C headers to use.
1418 dnl --enable-cheaders= [does stuff].
1419 dnl --disable-cheaders [does not do anything, really].
1420 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1421 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1423 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1424 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1425 [construct "C" headers for g++], [permit c|c_std|c_global])
1426 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1428 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1430 # Allow overrides to configure.host here.
1431 if test $enable_cheaders = c_global; then
1435 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1439 AC_SUBST(C_INCLUDE_DIR)
1440 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1441 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1442 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1443 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1444 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1449 dnl Check for which locale library to use. The choice is mapped to
1450 dnl a subdirectory of config/locale.
1452 dnl Default is generic.
1454 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1455 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1456 [use MODEL for target locale package],
1457 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1459 # Deal with gettext issues. Default to not using it (=no) until we detect
1460 # support for it later. Let the user turn it off via --e/d, but let that
1461 # default to on for easier handling.
1464 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1468 # Either a known packaage, or "auto"
1469 if test $enable_clocale = no || test $enable_clocale = yes; then
1472 enable_clocale_flag=$enable_clocale
1474 # Probe for locale model to use if none specified.
1475 # Default to "generic".
1476 if test $enable_clocale_flag = auto; then
1477 case ${target_os} in
1478 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1479 enable_clocale_flag=gnu
1482 enable_clocale_flag=darwin
1485 enable_clocale_flag=generic
1490 # Sanity check model, and test for special functionality.
1491 if test $enable_clocale_flag = gnu; then
1492 AC_EGREP_CPP([_GLIBCXX_ok], [
1493 #include <features.h>
1494 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1497 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1499 if test $enable_clocale = auto; then
1500 # Test for bugs early in glibc-2.2.x series
1502 #define _GNU_SOURCE 1
1505 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1506 extern __typeof(newlocale) __newlocale;
1507 extern __typeof(duplocale) __duplocale;
1508 extern __typeof(strcoll_l) __strcoll_l;
1512 const char __one[] = "Äuglein Augmen";
1513 const char __two[] = "Äuglein";
1518 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1519 loc_dup = __duplocale(loc);
1520 i = __strcoll_l(__one, __two, loc);
1521 j = __strcoll_l(__one, __two, loc_dup);
1525 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1526 [enable_clocale_flag=generic])
1529 # Set it to scream when it hurts.
1530 ac_save_CFLAGS="$CFLAGS"
1531 CFLAGS="-Wimplicit-function-declaration -Werror"
1533 # Use strxfrm_l if available.
1534 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1536 #include <locale.h>],
1537 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1538 AC_DEFINE(HAVE_STRXFRM_L, 1,
1539 [Define if strxfrm_l is available in <string.h>.]),)
1541 # Use strerror_l if available.
1542 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1544 #include <locale.h>],
1545 [__locale_t loc; strerror_l(5, loc);],
1546 AC_DEFINE(HAVE_STRERROR_L, 1,
1547 [Define if strerror_l is available in <string.h>.]),)
1549 CFLAGS="$ac_save_CFLAGS"
1552 # Perhaps use strerror_r if available, and strerror_l isn't.
1553 ac_save_CFLAGS="$CFLAGS"
1554 CFLAGS="-Wimplicit-function-declaration -Werror"
1555 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1557 #include <locale.h>],
1558 [char s[128]; strerror_r(5, s, 128);],
1559 AC_DEFINE(HAVE_STRERROR_R, 1,
1560 [Define if strerror_r is available in <string.h>.]),)
1561 CFLAGS="$ac_save_CFLAGS"
1563 # Set configure bits for specified locale package
1564 AC_MSG_CHECKING([for C locale to use])
1565 case ${enable_clocale_flag} in
1567 AC_MSG_RESULT(generic)
1569 CLOCALE_H=config/locale/generic/c_locale.h
1570 CLOCALE_CC=config/locale/generic/c_locale.cc
1571 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1572 CCOLLATE_CC=config/locale/generic/collate_members.cc
1573 CCTYPE_CC=config/locale/generic/ctype_members.cc
1574 CMESSAGES_H=config/locale/generic/messages_members.h
1575 CMESSAGES_CC=config/locale/generic/messages_members.cc
1576 CMONEY_CC=config/locale/generic/monetary_members.cc
1577 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1578 CTIME_H=config/locale/generic/time_members.h
1579 CTIME_CC=config/locale/generic/time_members.cc
1580 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1583 AC_MSG_RESULT(darwin or freebsd)
1585 CLOCALE_H=config/locale/generic/c_locale.h
1586 CLOCALE_CC=config/locale/generic/c_locale.cc
1587 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1588 CCOLLATE_CC=config/locale/generic/collate_members.cc
1589 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1590 CMESSAGES_H=config/locale/generic/messages_members.h
1591 CMESSAGES_CC=config/locale/generic/messages_members.cc
1592 CMONEY_CC=config/locale/generic/monetary_members.cc
1593 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1594 CTIME_H=config/locale/generic/time_members.h
1595 CTIME_CC=config/locale/generic/time_members.cc
1596 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1602 # Declare intention to use gettext, and add support for specific
1604 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1607 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1608 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1609 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1612 # Export the build objects.
1613 for ling in $ALL_LINGUAS; do \
1614 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1615 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1617 AC_SUBST(glibcxx_MOFILES)
1618 AC_SUBST(glibcxx_POFILES)
1620 CLOCALE_H=config/locale/gnu/c_locale.h
1621 CLOCALE_CC=config/locale/gnu/c_locale.cc
1622 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1623 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1624 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1625 CMESSAGES_H=config/locale/gnu/messages_members.h
1626 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1627 CMONEY_CC=config/locale/gnu/monetary_members.cc
1628 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1629 CTIME_H=config/locale/gnu/time_members.h
1630 CTIME_CC=config/locale/gnu/time_members.cc
1631 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1634 AC_MSG_RESULT(IEEE 1003.1)
1636 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1637 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1638 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1639 CCOLLATE_CC=config/locale/generic/collate_members.cc
1640 CCTYPE_CC=config/locale/generic/ctype_members.cc
1641 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1642 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1643 CMONEY_CC=config/locale/generic/monetary_members.cc
1644 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1645 CTIME_H=config/locale/generic/time_members.h
1646 CTIME_CC=config/locale/generic/time_members.cc
1647 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1651 # This is where the testsuite looks for locale catalogs, using the
1652 # -DLOCALEDIR define during testsuite compilation.
1653 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1654 AC_SUBST(glibcxx_localedir)
1656 # A standalone libintl (e.g., GNU libintl) may be in use.
1657 if test $USE_NLS = yes; then
1658 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1659 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1661 if test $USE_NLS = yes; then
1662 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1663 [Define if NLS translations are to be used.])
1668 AC_SUBST(CMESSAGES_H)
1669 AC_SUBST(CCODECVT_CC)
1670 AC_SUBST(CCOLLATE_CC)
1672 AC_SUBST(CMESSAGES_CC)
1674 AC_SUBST(CNUMERIC_CC)
1677 AC_SUBST(CLOCALE_CC)
1678 AC_SUBST(CLOCALE_INTERNAL_H)
1683 dnl Check for which std::allocator base class to use. The choice is
1684 dnl mapped from a subdirectory of include/ext.
1688 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1689 AC_MSG_CHECKING([for std::allocator base class])
1690 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1691 [use KIND for target std::allocator base],
1692 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1694 # If they didn't use this option switch, or if they specified --enable
1695 # with no specific model, we'll have to look for one. If they
1696 # specified --disable (???), do likewise.
1697 if test $enable_libstdcxx_allocator = no ||
1698 test $enable_libstdcxx_allocator = yes;
1700 enable_libstdcxx_allocator=auto
1703 # Either a known package, or "auto". Auto implies the default choice
1704 # for a particular platform.
1705 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1707 # Probe for host-specific support if no specific model is specified.
1709 if test $enable_libstdcxx_allocator_flag = auto; then
1710 case ${target_os} in
1711 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1712 enable_libstdcxx_allocator_flag=new
1715 enable_libstdcxx_allocator_flag=new
1719 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1722 # Set configure bits for specified locale package
1723 case ${enable_libstdcxx_allocator_flag} in
1725 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1726 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1729 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1730 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1733 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1734 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1737 ALLOCATOR_H=config/allocator/new_allocator_base.h
1738 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1741 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1742 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1746 AC_SUBST(ALLOCATOR_H)
1747 AC_SUBST(ALLOCATOR_NAME)
1752 dnl Check for whether the Boost-derived checks should be turned on.
1754 dnl --enable-concept-checks turns them on.
1755 dnl --disable-concept-checks leaves them off.
1756 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1757 dnl Where DEFAULT is either `yes' or `no'.
1759 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1760 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1761 if test $enable_concept_checks = yes; then
1762 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1763 [Define to use concept checking code from the boost libraries.])
1768 dnl Check for parallel mode pre-requisites, including OpenMP support.
1770 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1772 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1774 # NB: libstdc++ may be configured before libgomp: can't check for the actual
1775 # dependencies (omp.h and libgomp).
1777 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1778 enable_parallel=yes;
1780 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1783 # Check to see if it's explicitly disabled.
1784 # GLIBCXX_ENABLE(libgomp,$1,,[enable code depending on libgomp],
1787 # if test x$enable_libgomp = xno; then
1788 # enable_parallel=no
1791 AC_MSG_CHECKING([for parallel mode support])
1792 AC_MSG_RESULT([$enable_parallel])
1793 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1798 dnl Check for which I/O library to use: stdio, or something specific.
1800 dnl Default is stdio.
1802 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1803 AC_MSG_CHECKING([for underlying I/O to use])
1804 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1805 [use target-specific I/O package], [permit stdio])
1807 # Now that libio has been removed, you can have any color you want as long
1808 # as it's black. This is one big no-op until other packages are added, but
1809 # showing the framework never hurts.
1810 case ${enable_cstdio} in
1812 CSTDIO_H=config/io/c_io_stdio.h
1813 BASIC_FILE_H=config/io/basic_file_stdio.h
1814 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1815 AC_MSG_RESULT(stdio)
1820 AC_SUBST(BASIC_FILE_H)
1821 AC_SUBST(BASIC_FILE_CC)
1826 dnl Check for "unusual" flags to pass to the compiler while building.
1828 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1829 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1830 dnl --disable-cxx-flags passes nothing.
1831 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1832 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1833 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1834 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1835 dnl If "default flags" is an empty string, the effect is the same
1836 dnl as --disable or --enable=no.
1838 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1839 AC_MSG_CHECKING([for extra compiler flags for building])
1840 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1841 [pass compiler FLAGS when building library],
1842 [case "x$enable_cxx_flags" in
1843 xno | x) enable_cxx_flags= ;;
1845 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1848 # Run through flags (either default or command-line) and set anything
1849 # extra (e.g., #defines) that must accompany particular g++ options.
1850 if test -n "$enable_cxx_flags"; then
1851 for f in $enable_cxx_flags; do
1855 *) # and we're trying to pass /what/ exactly?
1856 AC_MSG_ERROR([compiler flags start with a -]) ;;
1861 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1862 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1863 AC_SUBST(EXTRA_CXX_FLAGS)
1868 dnl Check to see if debugging libraries are to be built.
1870 dnl --enable-libstdcxx-debug
1871 dnl builds a separate set of debugging libraries in addition to the
1872 dnl normal (shared, static) libstdc++ binaries.
1874 dnl --disable-libstdcxx-debug
1875 dnl builds only one (non-debug) version of libstdc++.
1877 dnl --enable-libstdcxx-debug-flags=FLAGS
1878 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1880 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1881 dnl Where DEFAULT is either `yes' or `no'.
1883 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1884 AC_MSG_CHECKING([for additional debug build])
1885 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1886 AC_MSG_RESULT($enable_libstdcxx_debug)
1887 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1892 dnl Check for explicit debug flags.
1894 dnl --enable-libstdcxx-debug-flags='-O1'
1895 dnl is a general method for passing flags to be used when
1896 dnl building debug libraries with --enable-debug.
1898 dnl --disable-libstdcxx-debug-flags does nothing.
1899 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1900 dnl If "default flags" is an empty string, the effect is the same
1901 dnl as --disable or --enable=no.
1903 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1904 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1905 [pass compiler FLAGS when building debug library],
1906 [case "x$enable_libstdcxx_debug_flags" in
1907 xno | x) enable_libstdcxx_debug_flags= ;;
1909 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1912 # Option parsed, now set things appropriately
1913 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1914 AC_SUBST(DEBUG_FLAGS)
1916 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1921 dnl Check if the user only wants a freestanding library implementation.
1923 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1924 dnl installing only the headers required by [17.4.1.3] and the language
1925 dnl support library. More than that will be built (to keep the Makefiles
1926 dnl conveniently clean), but not installed.
1929 dnl is_hosted (yes/no)
1932 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1934 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1935 AC_ARG_ENABLE([hosted-libstdcxx],
1936 AC_HELP_STRING([--disable-hosted-libstdcxx],
1937 [only build freestanding C++ runtime support]),,
1940 enable_hosted_libstdcxx=no
1943 enable_hosted_libstdcxx=yes
1946 if test "$enable_hosted_libstdcxx" = no; then
1947 AC_MSG_NOTICE([Only freestanding libraries will be built])
1951 enable_libstdcxx_pch=no
1956 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1957 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1958 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1963 dnl Check for template specializations for the 'long long' type.
1964 dnl The result determines only whether 'long long' I/O is enabled; things
1965 dnl like numeric_limits<> specializations are always available.
1967 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1968 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1969 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1970 dnl Where DEFAULT is either `yes' or `no'.
1972 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1973 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1974 if test $enable_long_long = yes; then
1975 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1976 [Define if code specialized for long long should be used.])
1978 AC_MSG_CHECKING([for enabled long long specializations])
1979 AC_MSG_RESULT([$enable_long_long])
1984 dnl Check for template specializations for the 'wchar_t' type.
1986 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1987 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1988 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1989 dnl Where DEFAULT is either `yes' or `no'.
1991 dnl Necessary support must also be present.
1993 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1994 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1996 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1997 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1998 AC_MSG_CHECKING([for mbstate_t])
1999 AC_TRY_COMPILE([#include <wchar.h>],
2000 [mbstate_t teststate;],
2001 have_mbstate_t=yes, have_mbstate_t=no)
2002 AC_MSG_RESULT($have_mbstate_t)
2003 if test x"$have_mbstate_t" = xyes; then
2004 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2007 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2009 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2011 if test x"$enable_wchar_t" = x"yes"; then
2016 if test x"$ac_has_wchar_h" = xyes &&
2017 test x"$ac_has_wctype_h" = xyes; then
2018 AC_TRY_COMPILE([#include <wchar.h>
2079 ],[],[], [enable_wchar_t=no])
2087 if test x"$enable_wchar_t" = x"yes"; then
2088 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2089 [Define if code specialized for wchar_t should be used.])
2092 AC_MSG_CHECKING([for enabled wchar_t specializations])
2093 AC_MSG_RESULT([$enable_wchar_t])
2098 dnl Check to see if building and using a C++ precompiled header can be done.
2100 dnl --enable-libstdcxx-pch=yes
2101 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2102 dnl may work, after some light-hearted attempts to puzzle out compiler
2103 dnl support, flip bits on in include/Makefile.am
2105 dnl --disable-libstdcxx-pch
2106 dnl turns off attempts to use or build stdc++.h.gch.
2109 dnl glibcxx_PCHFLAGS
2111 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2112 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2113 if test $enable_libstdcxx_pch = yes; then
2114 AC_CACHE_CHECK([for compiler with PCH support],
2115 [glibcxx_cv_prog_CXX_pch],
2116 [ac_save_CXXFLAGS="$CXXFLAGS"
2117 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2120 echo '#include <math.h>' > conftest.h
2121 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2122 -o conftest.h.gch 1>&5 2>&1 &&
2123 echo '#error "pch failed"' > conftest.h &&
2124 echo '#include "conftest.h"' > conftest.cc &&
2125 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2127 glibcxx_cv_prog_CXX_pch=yes
2129 glibcxx_cv_prog_CXX_pch=no
2132 CXXFLAGS=$ac_save_CXXFLAGS
2135 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2138 AC_MSG_CHECKING([for enabled PCH])
2139 AC_MSG_RESULT([$enable_libstdcxx_pch])
2141 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2142 if test $enable_libstdcxx_pch = yes; then
2143 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2147 AC_SUBST(glibcxx_PCHFLAGS)
2152 dnl Check for atomic builtins.
2154 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2156 dnl This checks to see if the host supports the compiler-generated
2157 dnl builtins for atomic operations. Note, this is intended to be an
2158 dnl all-or-nothing switch, so all the atomic operations that are used
2159 dnl should be checked.
2162 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2163 dnl see: CHECK_SYNC_FETCH_AND_ADD
2166 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
2168 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2169 AC_MSG_CHECKING([for atomic builtins])
2173 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2174 cat > conftest.$ac_ext << EOF
2175 [#]line __oline__ "configure"
2178 // NB: _Atomic_word not necessarily int.
2179 typedef int atomic_type;
2182 const atomic_type c3(0);
2183 if (__sync_fetch_and_add(&c1, c2) == c3)
2190 old_CXXFLAGS="$CXXFLAGS"
2192 if AC_TRY_EVAL(ac_compile); then
2193 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2194 enable_atomic_builtins=no
2196 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2197 [Define if builtin atomic operations are supported on this host.])
2198 enable_atomic_builtins=yes
2199 atomicity_dir=cpu/generic/atomicity_builtins
2202 CXXFLAGS="$old_CXXFLAGS"
2205 # Now, if still generic, set to mutex.
2206 if test $atomicity_dir = "cpu/generic" ; then
2207 atomicity_dir=cpu/generic/atomicity_mutex
2210 AC_MSG_RESULT($enable_atomic_builtins)
2215 dnl Check for exception handling support. If an explicit enable/disable
2216 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2217 dnl target may or may not support call frame exceptions.
2219 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2220 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2221 dnl Neither one forces an attempt at detection.
2224 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2226 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2227 AC_MSG_CHECKING([for exception model to use])
2230 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2231 [force use of builtin_setjmp for exceptions],
2232 [permit yes|no|auto])
2234 if test $enable_sjlj_exceptions = auto; then
2235 # Botheration. Now we've got to detect the exception model. Link tests
2236 # against libgcc.a are problematic since we've not been given proper -L
2237 # bits for single-tree newlib and libgloss.
2239 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2240 cat > conftest.$ac_ext << EOF
2241 [#]line __oline__ "configure"
2250 old_CXXFLAGS="$CXXFLAGS"
2252 if AC_TRY_EVAL(ac_compile); then
2253 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2254 enable_sjlj_exceptions=yes
2255 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2256 enable_sjlj_exceptions=no
2257 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2258 enable_sjlj_exceptions=no
2261 CXXFLAGS="$old_CXXFLAGS"
2265 # This is a tad weird, for hysterical raisins. We have to map
2266 # enable/disable to two different models.
2267 case $enable_sjlj_exceptions in
2269 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2270 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2271 ac_exception_model_name=sjlj
2274 ac_exception_model_name="call frame"
2277 AC_MSG_ERROR([unable to detect exception model])
2281 AC_MSG_RESULT($ac_exception_model_name)
2286 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2288 dnl --enable-visibility enables attempt to use visibility attributes.
2289 dnl --disable-visibility turns off all use of visibility attributes.
2290 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2291 dnl Where DEFAULT is 'yes'.
2293 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2294 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2296 if test x$enable_visibility = xyes ; then
2297 dnl all hail libgfortran
2298 dnl Check whether the target supports hidden visibility.
2299 AC_CACHE_CHECK([whether the target supports hidden visibility],
2300 have_attribute_visibility, [
2301 save_CFLAGS="$CFLAGS"
2302 CFLAGS="$CFLAGS -Werror"
2303 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2304 [], have_attribute_visibility=yes,
2305 have_attribute_visibility=no)
2306 CFLAGS="$save_CFLAGS"])
2307 if test $have_attribute_visibility = no; then
2308 enable_visibility=no
2312 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2313 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2318 dnl Add version tags to symbols in shared library (or not), additionally
2319 dnl marking other symbols as private/local (or not).
2321 dnl --enable-symvers=style adds a version script to the linker call when
2322 dnl creating the shared library. The choice of version script is
2323 dnl controlled by 'style'.
2324 dnl --disable-symvers does not.
2325 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2326 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2327 dnl choose a default style based on linker characteristics. Passing
2328 dnl 'no' disables versioning.
2330 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2332 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2333 [enables symbol versioning of the shared library],
2334 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2336 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2337 # don't know enough about $LD to do tricks...
2338 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2340 # Turn a 'yes' into a suitable default.
2341 if test x$enable_symvers = xyes ; then
2342 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2345 if test $with_gnu_ld = yes ; then
2348 case ${target_os} in
2350 enable_symvers=darwin ;;
2352 enable_symvers=no ;;
2358 # Check to see if 'darwin' or 'darwin-export' can win.
2359 if test x$enable_symvers = xdarwin-export ; then
2360 enable_symvers=darwin
2363 # Check to see if 'gnu' can win.
2364 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2365 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2366 AC_MSG_CHECKING([for shared libgcc])
2367 ac_save_CFLAGS="$CFLAGS"
2369 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2370 CFLAGS="$ac_save_CFLAGS"
2371 if test $glibcxx_shared_libgcc = no; then
2372 cat > conftest.c <<EOF
2373 int main (void) { return 0; }
2376 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2377 -shared -shared-libgcc -o conftest.so \
2378 conftest.c -v 2>&1 >/dev/null \
2379 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2381 rm -f conftest.c conftest.so
2382 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2383 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2384 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2385 CFLAGS="$ac_save_CFLAGS"
2388 AC_MSG_RESULT($glibcxx_shared_libgcc)
2390 # For GNU ld, we need at least this version. The format is described in
2391 # GLIBCXX_CHECK_LINKER_FEATURES above.
2392 glibcxx_min_gnu_ld_version=21400
2394 # If no shared libgcc, can't win.
2395 if test $glibcxx_shared_libgcc != yes; then
2396 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2397 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2398 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2400 elif test $with_gnu_ld != yes ; then
2402 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2403 AC_MSG_WARN([=== you are not using the GNU linker.])
2404 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2406 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2407 # The right tools, the right setup, but too old. Fallbacks?
2408 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2409 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2410 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2411 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2412 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2417 # Everything parsed; figure out what file to use.
2418 case $enable_symvers in
2420 SYMVER_FILE=config/abi/pre/none.ver
2423 SYMVER_FILE=config/abi/pre/gnu.ver
2424 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2425 [Define to use GNU versioning in the shared library.])
2427 gnu-versioned-namespace)
2428 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2429 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2430 [Define to use GNU namespace versioning in the shared library.])
2433 SYMVER_FILE=config/abi/pre/gnu.ver
2434 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2435 [Define to use darwin versioning in the shared library.])
2439 if test x$enable_symvers != xno ; then
2440 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2441 [Define to use symbol versioning in the shared library.])
2444 AC_SUBST(SYMVER_FILE)
2445 AC_SUBST(port_specific_symbol_files)
2446 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2447 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2448 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2449 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2450 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2452 # Now, set up compatibility support, if any.
2453 # In addition, need this to deal with std::size_t mangling in
2454 # src/compatibility.cc. In a perfect world, could use
2455 # typeid(std::size_t).name()[0] to do direct substitution.
2456 AC_MSG_CHECKING([for size_t as unsigned int])
2457 ac_save_CFLAGS="$CFLAGS"
2459 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2460 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2461 CFLAGS=$ac_save_CFLAGS
2462 if test "$glibcxx_size_t_is_i" = yes; then
2463 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2465 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2467 AC_MSG_CHECKING([for ptrdiff_t as int])
2468 ac_save_CFLAGS="$CFLAGS"
2470 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2471 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2472 CFLAGS=$ac_save_CFLAGS
2473 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2474 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2476 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2481 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2482 dnl We must stage the required headers so that they will be installed
2483 dnl with the library (unlike libgcc, the STL implementation is provided
2484 dnl solely within headers). Since we must not inject random user-space
2485 dnl macro names into user-provided C++ code, we first stage into <file>-in
2486 dnl and process to <file> with an output command. The reason for a two-
2487 dnl stage process here is to correctly handle $srcdir!=$objdir without
2488 dnl having to write complex code (the sed commands to clean the macro
2489 dnl namespace are complex and fragile enough as it is). We must also
2490 dnl add a relative path so that -I- is supported properly.
2493 dnl glibcxx_thread_h
2496 dnl HAVE_GTHR_DEFAULT
2498 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2499 AC_MSG_CHECKING([for thread model used by GCC])
2500 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2501 AC_MSG_RESULT([$target_thread_file])
2503 if test $target_thread_file != single; then
2504 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2505 [Define if gthr-default.h exists
2506 (meaning that threading support is enabled).])
2509 glibcxx_thread_h=gthr-$target_thread_file.h
2511 dnl Check for __GTHREADS define.
2512 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2513 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2519 AC_SUBST(glibcxx_thread_h)
2523 # Check whether LC_MESSAGES is available in <locale.h>.
2524 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2526 # This file file be copied and used freely without restrictions. It can
2527 # be used in projects which are not available under the GNU Public License
2528 # but which still want to provide support for the GNU gettext functionality.
2529 # Please note that the actual code is *not* freely available.
2532 AC_DEFUN([AC_LC_MESSAGES], [
2533 AC_CHECK_HEADER(locale.h, [
2534 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2535 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2536 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2537 if test $ac_cv_val_LC_MESSAGES = yes; then
2538 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2539 [Define if LC_MESSAGES is available in <locale.h>.])
2544 # Macros from the top-level gcc directory.
2545 m4_include([../config/tls.m4])