3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
27 AC_MSG_NOTICE([OS config directory is $os_include_dir])
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
63 toplevel_srcdir=${glibcxx_srcdir}/..
64 AC_SUBST(glibcxx_builddir)
65 AC_SUBST(glibcxx_srcdir)
66 AC_SUBST(toplevel_srcdir)
68 # We use these options to decide which functions to include. They are
69 # set from the top level.
70 AC_ARG_WITH([target-subdir],
71 AC_HELP_STRING([--with-target-subdir=SUBDIR],
72 [configuring in a subdirectory]))
74 AC_ARG_WITH([cross-host],
75 AC_HELP_STRING([--with-cross-host=HOST],
76 [configuring with a cross compiler]))
79 AC_HELP_STRING([--with-newlib],
80 [assume newlib as a system C library]))
82 # We're almost certainly being configured before anything else which uses
83 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
84 # we not cache the value of CXX that we "discover" here, because it's set
85 # to something unique for us and libjava. Other target libraries need to
86 # find CXX for themselves. We yank the rug out from under the normal AC_*
87 # process by sneakily renaming the cache variable. This also lets us debug
88 # the value of "our" CXX in postmortems.
90 # We must also force CXX to /not/ be a precious variable, otherwise the
91 # wrong (non-multilib-adjusted) value will be used in multilibs. This
92 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
93 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
94 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
96 # -fno-builtin must be present here so that a non-conflicting form of
97 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
99 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
100 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
101 m4_define([_AC_ARG_VAR_PRECIOUS],[])
102 save_CXXFLAGS="$CXXFLAGS"
103 CXXFLAGS="$CXXFLAGS -fno-builtin"
106 CXXFLAGS="$save_CXXFLAGS"
107 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
111 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
112 # available). Uncomment the next line to force a particular method.
116 AC_CHECK_TOOL(AS, as)
117 AC_CHECK_TOOL(AR, ar)
118 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
122 # Set up safe default values for all subsequent AM_CONDITIONAL tests
123 # which are themselves conditionally expanded.
124 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
125 ## other macros from doing the same. This should be automated.) -pme
128 # Check for uClibc since Linux platforms use different configuration
129 # directories depending on the C library in use.
130 AC_EGREP_CPP([_using_uclibc], [
135 ], uclibc=yes, uclibc=no)
137 # Find platform-specific directories containing configuration info.
138 # Also possibly modify flags used elsewhere, as needed by the platform.
144 dnl Tests for newer compiler features, or features that are present in newer
145 dnl compiler versions but not older compiler versions still in use, should
149 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
150 dnl new inlining code or the new system_header pragma will die on -Werror.
151 dnl Leave it out by default and use maint-mode to use it.
152 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
153 dnl compiler supports it and the user has not requested debug mode.
155 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
156 # All these tests are for C++; save the language and the compiler flags.
157 # The CXXFLAGS thing is suspicious, but based on similar bits previously
158 # found in GLIBCXX_CONFIGURE.
161 ac_test_CXXFLAGS="${CXXFLAGS+set}"
162 ac_save_CXXFLAGS="$CXXFLAGS"
164 # Check for maintainer-mode bits.
165 if test x"$USE_MAINTAINER_MODE" = xno; then
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$ac_test_CXXFLAGS" = set; then
176 CXXFLAGS="$ac_save_CXXFLAGS"
178 # this is the suspicious part
181 if test x"$ac_fdsections" = x"yes"; then
182 SECTION_FLAGS='-ffunction-sections -fdata-sections'
184 AC_MSG_RESULT($ac_fdsections)
188 AC_SUBST(SECTION_FLAGS)
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
203 dnl glibcxx_gnu_ld_version (possibly)
205 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
206 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
208 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
209 # If we're not using GNU ld, then there's no point in even trying these
210 # tests. Check for that first. We should have already tested for gld
211 # by now (in libtool), but require it now just to be safe...
212 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
213 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
214 AC_REQUIRE([AC_PROG_LD])
215 AC_REQUIRE([AC_PROG_AWK])
217 # The name set by libtool depends on the version of libtool. Shame on us
218 # for depending on an impl detail, but c'est la vie. Older versions used
219 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
220 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
221 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
222 # set (hence we're using an older libtool), then set it.
223 if test x${with_gnu_ld+set} != xset; then
224 if test x${ac_cv_prog_gnu_ld+set} != xset; then
225 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
228 with_gnu_ld=$ac_cv_prog_gnu_ld
232 # Start by getting the version number. I think the libtool test already
233 # does some of this, but throws away the result.
234 if test x"$with_gnu_ld" = x"yes"; then
235 AC_MSG_CHECKING([for ld version])
237 ldver=`$LD --version 2>/dev/null | head -1 | \
238 sed -e 's/GNU ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\3/'`
240 glibcxx_gnu_ld_version=`echo $ldver | \
241 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
242 AC_MSG_RESULT($glibcxx_gnu_ld_version)
246 glibcxx_gcsections_min_ld=21602
247 if test x"$with_gnu_ld" = x"yes" &&
248 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
250 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
251 # NB: This flag only works reliably after 2.16.1. Configure tests
252 # for this are difficult, so hard wire a value that should work.
254 ac_test_CFLAGS="${CFLAGS+set}"
255 ac_save_CFLAGS="$CFLAGS"
256 CFLAGS='-Wl,--gc-sections'
258 # Check for -Wl,--gc-sections
259 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
260 AC_TRY_LINK([ int one(void) { return 1; }
261 int two(void) { return 2; }
262 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
263 if test "$ac_gcsections" = "yes"; then
266 if $CC -c conftest.c; then
267 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
268 grep "Warning: gc-sections option ignored" > /dev/null; then
272 rm -f conftest.c conftest.o conftest
274 if test "$ac_gcsections" = "yes"; then
275 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
277 AC_MSG_RESULT($ac_gcsections)
279 if test "$ac_test_CFLAGS" = set; then
280 CFLAGS="$ac_save_CFLAGS"
282 # this is the suspicious part
288 # Note this is only for shared objects.
290 if test x"$with_gnu_ld" = x"yes"; then
291 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
292 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
293 if test -n "$cxx_z_relo"; then
294 OPT_LDFLAGS="-Wl,-z,relro"
297 AC_MSG_RESULT($ac_ld_relro)
300 # Set linker optimization flags.
301 if test x"$with_gnu_ld" = x"yes"; then
302 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
305 AC_SUBST(SECTION_LDFLAGS)
306 AC_SUBST(OPT_LDFLAGS)
311 dnl Check for headers for, and arguments to, the setrlimit() function.
312 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
315 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
316 dnl various HAVE_LIMIT_* for individual limit names
318 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
319 AC_MSG_CHECKING([for RLIMIT_$1])
322 #include <sys/time.h>
323 #include <sys/resource.h>
325 [ int f = RLIMIT_$1 ; ],
326 [glibcxx_mresult=1], [glibcxx_mresult=0])
327 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
328 [Only used in build directory testsuite_hooks.h.])
329 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
333 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
334 setrlimit_have_headers=yes
335 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
337 [setrlimit_have_headers=no])
338 # If don't have the headers, then we can't run the tests now, and we
339 # won't be seeing any of these during testsuite compilation.
340 if test $setrlimit_have_headers = yes; then
341 # Can't do these in a loop, else the resulting syntax is wrong.
342 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
343 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
344 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
345 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
346 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
348 # Check for rlimit, setrlimit.
349 AC_CACHE_VAL(ac_setrlimit, [
352 #include <sys/time.h>
353 #include <sys/resource.h>
357 [ac_setrlimit=yes], [ac_setrlimit=no])
361 AC_MSG_CHECKING([for testsuite resource limits support])
362 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
364 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
365 [Define if using setrlimit to set resource limits during
370 AC_MSG_RESULT($ac_res_limits)
375 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
376 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
378 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
379 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
380 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
382 [#include <sys/stat.h>],
385 S_ISREG(buffer.st_mode);],
386 [glibcxx_cv_S_ISREG=yes],
387 [glibcxx_cv_S_ISREG=no])
389 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
391 [#include <sys/stat.h>],
394 S_IFREG & buffer.st_mode;],
395 [glibcxx_cv_S_IFREG=yes],
396 [glibcxx_cv_S_IFREG=no])
399 if test $glibcxx_cv_S_ISREG = yes; then
400 AC_DEFINE(HAVE_S_ISREG, 1,
401 [Define if S_IFREG is available in <sys/stat.h>.])
403 elif test $glibcxx_cv_S_IFREG = yes; then
404 AC_DEFINE(HAVE_S_IFREG, 1,
405 [Define if S_IFREG is available in <sys/stat.h>.])
413 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
415 AC_DEFUN([GLIBCXX_CHECK_POLL], [
416 AC_MSG_CHECKING([for poll])
417 AC_CACHE_VAL(glibcxx_cv_POLL, [
420 [struct pollfd pfd[1];
421 pfd[0].events = POLLIN;
423 [glibcxx_cv_POLL=yes],
424 [glibcxx_cv_POLL=no])
426 if test $glibcxx_cv_POLL = yes; then
427 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
429 AC_MSG_RESULT($glibcxx_cv_POLL)
434 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
436 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
437 AC_MSG_CHECKING([for writev])
438 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
440 [#include <sys/uio.h>],
441 [struct iovec iov[2];
443 [glibcxx_cv_WRITEV=yes],
444 [glibcxx_cv_WRITEV=no])
446 if test $glibcxx_cv_WRITEV = yes; then
447 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
449 AC_MSG_RESULT($glibcxx_cv_WRITEV)
454 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
456 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
457 AC_MSG_CHECKING([for int64_t])
458 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
460 [#include <stdint.h>],
462 [glibcxx_cv_INT64_T=yes],
463 [glibcxx_cv_INT64_T=no])
465 if test $glibcxx_cv_INT64_T = yes; then
466 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
468 AC_MSG_RESULT($glibcxx_cv_INT64_T)
473 dnl Check whether LFS support is available.
475 AC_DEFUN([GLIBCXX_CHECK_LFS], [
478 ac_save_CXXFLAGS="$CXXFLAGS"
479 CXXFLAGS="$CXXFLAGS -fno-exceptions"
480 AC_MSG_CHECKING([for LFS support])
481 AC_CACHE_VAL(glibcxx_cv_LFS, [
485 #include <sys/stat.h>
489 fseeko64(fp, 0, SEEK_CUR);
491 lseek64(1, 0, SEEK_CUR);
494 [glibcxx_cv_LFS=yes],
497 if test $glibcxx_cv_LFS = yes; then
498 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
500 AC_MSG_RESULT($glibcxx_cv_LFS)
501 CXXFLAGS="$ac_save_CXXFLAGS"
507 dnl Check for whether a fully dynamic basic_string implementation should
508 dnl be turned on, that does not put empty objects in per-process static
509 dnl memory (mostly useful together with shared memory allocators, see PR
510 dnl libstdc++/16612 for details).
512 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
513 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
514 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
515 dnl Where DEFAULT is either `yes' or `no'.
517 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
518 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
519 if test $enable_fully_dynamic_string = yes; then
520 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
521 [Define if a fully dynamic basic_string is wanted.])
527 dnl Does any necessary configuration of the testsuite directory. Generates
528 dnl the testsuite_hooks.h header.
530 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
534 dnl GLIBCXX_TEST_WCHAR_T
535 dnl GLIBCXX_TEST_THREAD
539 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
540 if $GLIBCXX_IS_NATIVE ; then
541 # Do checks for resource limit functions.
542 GLIBCXX_CHECK_SETRLIMIT
544 # Look for setenv, so that extended locale tests can be performed.
545 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
548 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
549 test $enable_symvers != no; then
552 enable_abi_check=no ;;
554 enable_abi_check=yes ;;
557 # Only build this as native, since automake does not understand
562 # Export file names for ABI checking.
563 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
564 AC_SUBST(baseline_dir)
569 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
573 dnl TOPLEVEL_INCLUDES
575 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
576 # Used for every C++ compile we perform.
578 -I$glibcxx_builddir/include/$host_alias \
579 -I$glibcxx_builddir/include \
580 -I$glibcxx_srcdir/libsupc++"
582 # For Canadian crosses, pick this up too.
583 if test $CANADIAN = yes; then
584 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
587 # Stuff in the actual top level. Currently only used by libsupc++ to
588 # get unwind* headers from the gcc dir.
589 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
590 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
592 # Now, export this to all the little Makefiles....
593 AC_SUBST(GLIBCXX_INCLUDES)
594 AC_SUBST(TOPLEVEL_INCLUDES)
599 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
600 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
603 dnl OPTIMIZE_CXXFLAGS
606 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
607 # Optimization flags that are probably a good idea for thrill-seekers. Just
608 # uncomment the lines below and make, everything else is ready to go...
609 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
610 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
611 AC_SUBST(OPTIMIZE_CXXFLAGS)
613 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
619 dnl All installation directory information is determined here.
623 dnl glibcxx_prefixdir
624 dnl glibcxx_toolexecdir
625 dnl glibcxx_toolexeclibdir
627 dnl Assumes cross_compiling bits already done, and with_cross_host in
630 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
631 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
632 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
633 glibcxx_toolexecdir=no
634 glibcxx_toolexeclibdir=no
635 glibcxx_prefixdir=$prefix
637 AC_MSG_CHECKING([for gxx-include-dir])
638 AC_ARG_WITH([gxx-include-dir],
639 AC_HELP_STRING([--with-gxx-include-dir=DIR],
640 [installation directory for include files]),
642 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
643 no) gxx_include_dir=no ;;
644 *) gxx_include_dir=$withval ;;
646 [gxx_include_dir=no])
647 AC_MSG_RESULT($gxx_include_dir)
649 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
650 AC_ARG_ENABLE([version-specific-runtime-libs],
651 AC_HELP_STRING([--enable-version-specific-runtime-libs],
652 [Specify that runtime libraries should be installed in a compiler-specific directory]),
653 [case "$enableval" in
654 yes) version_specific_libs=yes ;;
655 no) version_specific_libs=no ;;
656 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
658 [version_specific_libs=no])
659 AC_MSG_RESULT($version_specific_libs)
661 # Default case for install directory for include files.
662 if test $version_specific_libs = no && test $gxx_include_dir = no; then
663 gxx_include_dir='include/c++/${gcc_version}'
664 if test -n "$with_cross_host" &&
665 test x"$with_cross_host" != x"no"; then
666 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
668 gxx_include_dir='${prefix}/'"$gxx_include_dir"
672 # Version-specific runtime libs processing.
673 if test $version_specific_libs = yes; then
674 # Need the gcc compiler version to know where to install libraries
675 # and header files if --enable-version-specific-runtime-libs option
676 # is selected. FIXME: these variables are misnamed, there are
677 # no executables installed in _toolexecdir or _toolexeclibdir.
678 if test x"$gxx_include_dir" = x"no"; then
679 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
681 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
682 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
685 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
686 # Install a library built with a cross compiler in tooldir, not libdir.
687 if test x"$glibcxx_toolexecdir" = x"no"; then
688 if test -n "$with_cross_host" &&
689 test x"$with_cross_host" != x"no"; then
690 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
691 glibcxx_toolexeclibdir='${toolexecdir}/lib'
693 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
694 glibcxx_toolexeclibdir='${libdir}'
696 multi_os_directory=`$CXX -print-multi-os-directory`
697 case $multi_os_directory in
698 .) ;; # Avoid trailing /.
699 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
703 AC_MSG_CHECKING([for install location])
704 AC_MSG_RESULT($gxx_include_dir)
706 AC_SUBST(glibcxx_prefixdir)
707 AC_SUBST(gxx_include_dir)
708 AC_SUBST(glibcxx_toolexecdir)
709 AC_SUBST(glibcxx_toolexeclibdir)
715 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
716 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
717 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
719 dnl See docs/html/17_intro/configury.html#enable for documentation.
721 m4_define([GLIBCXX_ENABLE],[dnl
722 m4_define([_g_switch],[--enable-$1])dnl
723 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
724 AC_ARG_ENABLE($1,_g_help,
729 m4_bpatsubst([$5],[permit ])) ;;
730 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
731 dnl Idea for future: generate a URL pointing to
732 dnl "onlinedocs/configopts.html#whatever"
739 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
743 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
744 m4_undefine([_g_switch])dnl
745 m4_undefine([_g_help])dnl
750 dnl Check for ISO/IEC 9899:1999 "C99" support.
752 dnl --enable-c99 defines _GLIBCXX_USE_C99
753 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
754 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
755 dnl Where DEFAULT is either `yes' or `no'.
756 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
758 AC_DEFUN([GLIBCXX_ENABLE_C99], [
759 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
761 if test x"$enable_c99" = x"yes"; then
766 # Check for the existence of <math.h> functions used if C99 is enabled.
767 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
768 AC_CACHE_VAL(ac_c99_math, [
769 AC_TRY_COMPILE([#include <math.h>],
777 isgreaterequal(0.0,0.0);
779 islessequal(0.0,0.0);
780 islessgreater(0.0,0.0);
781 islessgreater(0.0,0.0);
782 isunordered(0.0,0.0);
783 ],[ac_c99_math=yes], [ac_c99_math=no])
785 AC_MSG_RESULT($ac_c99_math)
786 if test x"$ac_c99_math" = x"yes"; then
787 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
788 [Define if C99 functions or macros in <math.h> should be imported
789 in <cmath> in namespace std.])
792 # Check for the existence of <complex.h> complex math functions.
793 # This is necessary even though libstdc++ uses the builtin versions
794 # of these functions, because if the builtin cannot be used, a reference
795 # to the library function is emitted.
796 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
797 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
799 if test x"$ac_has_complex_h" = x"yes"; then
800 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
801 AC_TRY_COMPILE([#include <complex.h>],
802 [typedef __complex__ float float_type; float_type tmpf;
815 typedef __complex__ double double_type; double_type tmpd;
828 typedef __complex__ long double ld_type; ld_type tmpld;
841 ],[ac_c99_complex=yes], [ac_c99_complex=no])
843 AC_MSG_RESULT($ac_c99_complex)
844 if test x"$ac_c99_complex" = x"yes"; then
845 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
846 [Define if C99 functions in <complex.h> should be used in
847 <complex>. Using compiler builtins for these functions requires
848 corresponding C99 library functions to be present.])
851 # Check for the existence in <stdio.h> of vscanf, et. al.
852 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
853 AC_CACHE_VAL(ac_c99_stdio, [
854 AC_TRY_COMPILE([#include <stdio.h>
856 void foo(char* fmt, ...)
858 va_list args; va_start(args, fmt);
859 vfscanf(stderr, "%i", args);
861 vsnprintf(fmt, 0, "%i", args);
862 vsscanf(fmt, "%i", args);
864 [snprintf("12", 0, "%i");],
865 [ac_c99_stdio=yes], [ac_c99_stdio=no])
867 AC_MSG_RESULT($ac_c99_stdio)
869 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
870 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
871 AC_CACHE_VAL(ac_c99_stdlib, [
872 AC_TRY_COMPILE([#include <stdlib.h>],
875 strtold("gnu", &tmp);
876 strtoll("gnu", &tmp, 10);
877 strtoull("gnu", &tmp, 10);
882 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
884 AC_MSG_RESULT($ac_c99_stdlib)
886 # Check for the existence in <wchar.h> of wcstold, etc.
888 if test x"$ac_has_wchar_h" = xyes &&
889 test x"$ac_has_wctype_h" = xyes; then
890 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
891 AC_TRY_COMPILE([#include <wchar.h>
898 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
900 # Checks for wide character functions that may not be present.
901 # Injection of these is wrapped with guard macros.
902 # NB: only put functions here, instead of immediately above, if
903 # absolutely necessary.
904 AC_TRY_COMPILE([#include <wchar.h>
905 namespace test { using ::vfwscanf; } ], [],
906 [AC_DEFINE(HAVE_VFWSCANF,1,
907 [Defined if vfwscanf exists.])],[])
909 AC_TRY_COMPILE([#include <wchar.h>
910 namespace test { using ::vswscanf; } ], [],
911 [AC_DEFINE(HAVE_VSWSCANF,1,
912 [Defined if vswscanf exists.])],[])
914 AC_TRY_COMPILE([#include <wchar.h>
915 namespace test { using ::vwscanf; } ], [],
916 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
918 AC_TRY_COMPILE([#include <wchar.h>
919 namespace test { using ::wcstof; } ], [],
920 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
922 AC_TRY_COMPILE([#include <wctype.h>],
923 [ wint_t t; int i = iswblank(t);],
924 [AC_DEFINE(HAVE_ISWBLANK,1,
925 [Defined if iswblank exists.])],[])
927 AC_MSG_RESULT($ac_c99_wchar)
930 # Option parsed, now set things appropriately.
931 if test x"$ac_c99_math" = x"no" ||
932 test x"$ac_c99_complex" = x"no" ||
933 test x"$ac_c99_stdio" = x"no" ||
934 test x"$ac_c99_stdlib" = x"no" ||
935 test x"$ac_c99_wchar" = x"no"; then
938 AC_DEFINE(_GLIBCXX_USE_C99, 1,
939 [Define if C99 functions or macros from <wchar.h>, <math.h>,
940 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
946 AC_MSG_CHECKING([for fully enabled ISO C99 support])
947 AC_MSG_RESULT($enable_c99)
952 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
953 dnl facilities in Chapter 8, "C compatibility".
955 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
960 # Check for the existence of <complex.h> complex math functions used
962 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
963 ac_c99_complex_tr1=no;
964 if test x"$ac_has_complex_h" = x"yes"; then
965 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
966 AC_TRY_COMPILE([#include <complex.h>],
967 [typedef __complex__ float float_type; float_type tmpf;
974 typedef __complex__ double double_type; double_type tmpd;
981 typedef __complex__ long double ld_type; ld_type tmpld;
988 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
990 AC_MSG_RESULT($ac_c99_complex_tr1)
991 if test x"$ac_c99_complex_tr1" = x"yes"; then
992 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
993 [Define if C99 functions in <complex.h> should be used in
994 <tr1/complex>. Using compiler builtins for these functions
995 requires corresponding C99 library functions to be present.])
998 # Check for the existence of <ctype.h> functions.
999 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1000 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1001 AC_TRY_COMPILE([#include <ctype.h>],
1005 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1007 AC_MSG_RESULT($ac_c99_ctype_tr1)
1008 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1009 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1010 [Define if C99 functions in <ctype.h> should be imported in
1011 <tr1/cctype> in namespace std::tr1.])
1014 # Check for the existence of <fenv.h> functions.
1015 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1017 if test x"$ac_has_fenv_h" = x"yes"; then
1018 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1019 AC_TRY_COMPILE([#include <fenv.h>],
1024 ret = feclearexcept(except);
1025 ret = fegetexceptflag(pflag, except);
1026 ret = feraiseexcept(except);
1027 ret = fesetexceptflag(pflag, except);
1028 ret = fetestexcept(except);
1030 ret = fesetround(mode);
1031 ret = fegetenv(penv);
1032 ret = feholdexcept(penv);
1033 ret = fesetenv(penv);
1034 ret = feupdateenv(penv);
1035 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1037 AC_MSG_RESULT($ac_c99_fenv_tr1)
1038 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1039 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1040 [Define if C99 functions in <fenv.h> should be imported in
1041 <tr1/cfenv> in namespace std::tr1.])
1044 # Check for the existence of <stdint.h> types.
1045 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1046 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1047 AC_TRY_COMPILE([#include <stdint.h>],
1048 [typedef int8_t my_int8_t;
1049 typedef int16_t my_int16_t;
1050 typedef int32_t my_int32_t;
1051 typedef int64_t my_int64_t;
1052 typedef int_fast8_t my_int_fast8_t;
1053 typedef int_fast16_t my_int_fast16_t;
1054 typedef int_fast32_t my_int_fast32_t;
1055 typedef int_fast64_t my_int_fast64_t;
1056 typedef int_least8_t my_int_least8_t;
1057 typedef int_least16_t my_int_least16_t;
1058 typedef int_least32_t my_int_least32_t;
1059 typedef int_least64_t my_int_least64_t;
1060 typedef intmax_t my_intmax_t;
1061 typedef intptr_t my_intptr_t;
1062 typedef uint8_t my_uint8_t;
1063 typedef uint16_t my_uint16_t;
1064 typedef uint32_t my_uint32_t;
1065 typedef uint64_t my_uint64_t;
1066 typedef uint_fast8_t my_uint_fast8_t;
1067 typedef uint_fast16_t my_uint_fast16_t;
1068 typedef uint_fast32_t my_uint_fast32_t;
1069 typedef uint_fast64_t my_uint_fast64_t;
1070 typedef uint_least8_t my_uint_least8_t;
1071 typedef uint_least16_t my_uint_least16_t;
1072 typedef uint_least32_t my_uint_least32_t;
1073 typedef uint_least64_t my_uint_least64_t;
1074 typedef uintmax_t my_uintmax_t;
1075 typedef uintptr_t my_uintptr_t;
1076 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1078 AC_MSG_RESULT($ac_c99_stdint_tr1)
1079 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1080 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1081 [Define if C99 types in <stdint.h> should be imported in
1082 <tr1/cstdint> in namespace std::tr1.])
1085 # Check for the existence of <math.h> functions.
1086 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1087 AC_CACHE_VAL(ac_c99_math_tr1, [
1088 AC_TRY_COMPILE([#include <math.h>],
1089 [typedef double_t my_double_t;
1090 typedef float_t my_float_t;
1104 copysignf(0.0f, 0.0f);
1105 copysignl(0.0l, 0.0l);
1122 fmaf(0.0f, 0.0f, 0.0f);
1123 fmal(0.0l, 0.0l, 0.0l);
1166 nextafter(0.0, 0.0);
1167 nextafterf(0.0f, 0.0f);
1168 nextafterl(0.0l, 0.0l);
1169 nexttoward(0.0, 0.0);
1170 nexttowardf(0.0f, 0.0f);
1171 nexttowardl(0.0l, 0.0l);
1172 remainder(0.0, 0.0);
1173 remainderf(0.0f, 0.0f);
1174 remainderl(0.0l, 0.0l);
1175 remquo(0.0, 0.0, 0);
1176 remquo(0.0f, 0.0f, 0);
1177 remquo(0.0l, 0.0l, 0);
1196 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1198 AC_MSG_RESULT($ac_c99_math_tr1)
1199 if test x"$ac_c99_math_tr1" = x"yes"; then
1200 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1201 [Define if C99 functions or macros in <math.h> should be imported
1202 in <tr1/cmath> in namespace std::tr1.])
1205 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1206 # sense if the previous check fails, per C99, 7.8/1).
1207 ac_c99_inttypes_tr1=no;
1208 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1209 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1210 AC_TRY_COMPILE([#include <inttypes.h>],
1211 [intmax_t i, numer, denom, base;
1214 intmax_t ret = imaxabs(i);
1215 imaxdiv_t dret = imaxdiv(numer, denom);
1216 ret = strtoimax(s, endptr, base);
1217 uintmax_t uret = strtoumax(s, endptr, base);
1218 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1220 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1221 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1222 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1223 [Define if C99 functions in <inttypes.h> should be imported in
1224 <tr1/cinttypes> in namespace std::tr1.])
1227 # Check for the existence of the <stdbool.h> header.
1228 AC_CHECK_HEADERS(stdbool.h)
1234 dnl Check whether "dev/random" and "dev/urandom" are available for the
1235 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1237 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1239 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1240 AC_CACHE_VAL(ac_random_tr1, [
1241 AC_TRY_RUN([#include <stdio.h>
1244 return !(fopen("/dev/random", "r")
1245 && fopen("/dev/urandom", "r"));
1248 [ac_random_tr1=yes], [ac_random_tr1=no],
1251 AC_MSG_RESULT($ac_random_tr1)
1252 if test x"$ac_random_tr1" = x"yes"; then
1253 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1254 [Define if dev/random and dev/urandom are available for
1255 the random_device of TR1 (Chapter 5.1).])
1261 dnl Check whether macros, etc are present for <system_error>
1263 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1265 AC_MSG_CHECKING([for EOWNERDEAD])
1266 AC_CACHE_VAL(ac_system_error1, [
1267 AC_TRY_COMPILE([#include <errno.h>], [ int i = EOWNERDEAD; ],
1268 [ac_system_error1=yes], [ac_system_error1=no])
1270 AC_MSG_RESULT($ac_system_error1)
1271 if test x"$ac_system_error1" = x"yes"; then
1272 AC_DEFINE(HAVE_EOWNERDEAD, 1, [Define if EOWNERDEAD exists.])
1275 AC_MSG_CHECKING([for ENOTRECOVERABLE])
1276 AC_CACHE_VAL(ac_system_error2, [
1277 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOTRECOVERABLE; ],
1278 [ac_system_error2=yes], [ac_system_error2=no])
1280 AC_MSG_RESULT($ac_system_error2)
1281 if test x"$ac_system_error2" = x"yes"; then
1282 AC_DEFINE(HAVE_ENOTRECOVERABLE, 1, [Define if ENOTRECOVERABLE exists.])
1285 AC_MSG_CHECKING([for sys_nerr])
1286 AC_CACHE_VAL(ac_system_error3, [
1287 AC_TRY_COMPILE([#include <errno.h> ], [ int i = sys_nerr; ],
1288 [ac_system_error3=yes], [ac_system_error3=no])
1290 AC_MSG_RESULT($ac_system_error3)
1291 if test x"$ac_system_error3" = x"yes"; then
1292 AC_DEFINE(HAVE_SYS_NERR, 1, [Define if sys_nerr exists.])
1297 dnl Check for what type of C headers to use.
1299 dnl --enable-cheaders= [does stuff].
1300 dnl --disable-cheaders [does not do anything, really].
1301 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1302 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1304 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1305 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1306 [construct "C" headers for g++], [permit c|c_std|c_global])
1307 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1309 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1311 # Allow overrides to configure.host here.
1312 if test $enable_cheaders = c_global; then
1316 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1320 AC_SUBST(C_INCLUDE_DIR)
1321 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1322 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1323 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1324 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1325 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1330 dnl Check for which locale library to use. The choice is mapped to
1331 dnl a subdirectory of config/locale.
1333 dnl Default is generic.
1335 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1336 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1337 [use MODEL for target locale package],
1338 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1340 # Deal with gettext issues. Default to not using it (=no) until we detect
1341 # support for it later. Let the user turn it off via --e/d, but let that
1342 # default to on for easier handling.
1345 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1349 # Either a known packaage, or "auto"
1350 if test $enable_clocale = no || test $enable_clocale = yes; then
1353 enable_clocale_flag=$enable_clocale
1355 # Probe for locale model to use if none specified.
1356 # Default to "generic".
1357 if test $enable_clocale_flag = auto; then
1358 case ${target_os} in
1359 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1360 enable_clocale_flag=gnu
1363 enable_clocale_flag=darwin
1366 enable_clocale_flag=generic
1371 # Sanity check model, and test for special functionality.
1372 if test $enable_clocale_flag = gnu; then
1373 AC_EGREP_CPP([_GLIBCXX_ok], [
1374 #include <features.h>
1375 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1378 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1380 if test $enable_clocale = auto; then
1381 # Test for bugs early in glibc-2.2.x series
1383 #define _GNU_SOURCE 1
1386 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1387 extern __typeof(newlocale) __newlocale;
1388 extern __typeof(duplocale) __duplocale;
1389 extern __typeof(strcoll_l) __strcoll_l;
1393 const char __one[] = "Äuglein Augmen";
1394 const char __two[] = "Äuglein";
1399 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1400 loc_dup = __duplocale(loc);
1401 i = __strcoll_l(__one, __two, loc);
1402 j = __strcoll_l(__one, __two, loc_dup);
1406 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1407 [enable_clocale_flag=generic])
1410 # Set it to scream when it hurts.
1411 ac_save_CFLAGS="$CFLAGS"
1412 CFLAGS="-Wimplicit-function-declaration -Werror"
1414 # Use strxfrm_l if available.
1415 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1417 #include <locale.h>],
1418 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1419 AC_DEFINE(HAVE_STRXFRM_L, 1,
1420 [Define if strxfrm_l is available in <string.h>.]),)
1422 # Use strerror_l if available.
1423 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1425 #include <locale.h>],
1426 [__locale_t loc; strerror_l(5, loc);],
1427 AC_DEFINE(HAVE_STRERROR_L, 1,
1428 [Define if strerror_l is available in <string.h>.]),)
1430 CFLAGS="$ac_save_CFLAGS"
1433 # Perhaps use strerror_r if available, and strerror_l isn't.
1434 ac_save_CFLAGS="$CFLAGS"
1435 CFLAGS="-Wimplicit-function-declaration -Werror"
1436 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1438 #include <locale.h>],
1439 [char s[128]; strerror_r(5, s, 128);],
1440 AC_DEFINE(HAVE_STRERROR_R, 1,
1441 [Define if strerror_r is available in <string.h>.]),)
1442 CFLAGS="$ac_save_CFLAGS"
1444 # Set configure bits for specified locale package
1445 AC_MSG_CHECKING([for C locale to use])
1446 case ${enable_clocale_flag} in
1448 AC_MSG_RESULT(generic)
1450 CLOCALE_H=config/locale/generic/c_locale.h
1451 CLOCALE_CC=config/locale/generic/c_locale.cc
1452 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1453 CCOLLATE_CC=config/locale/generic/collate_members.cc
1454 CCTYPE_CC=config/locale/generic/ctype_members.cc
1455 CMESSAGES_H=config/locale/generic/messages_members.h
1456 CMESSAGES_CC=config/locale/generic/messages_members.cc
1457 CMONEY_CC=config/locale/generic/monetary_members.cc
1458 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1459 CTIME_H=config/locale/generic/time_members.h
1460 CTIME_CC=config/locale/generic/time_members.cc
1461 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1464 AC_MSG_RESULT(darwin or freebsd)
1466 CLOCALE_H=config/locale/generic/c_locale.h
1467 CLOCALE_CC=config/locale/generic/c_locale.cc
1468 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1469 CCOLLATE_CC=config/locale/generic/collate_members.cc
1470 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1471 CMESSAGES_H=config/locale/generic/messages_members.h
1472 CMESSAGES_CC=config/locale/generic/messages_members.cc
1473 CMONEY_CC=config/locale/generic/monetary_members.cc
1474 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1475 CTIME_H=config/locale/generic/time_members.h
1476 CTIME_CC=config/locale/generic/time_members.cc
1477 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1483 # Declare intention to use gettext, and add support for specific
1485 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1488 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1489 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1490 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1493 # Export the build objects.
1494 for ling in $ALL_LINGUAS; do \
1495 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1496 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1498 AC_SUBST(glibcxx_MOFILES)
1499 AC_SUBST(glibcxx_POFILES)
1501 CLOCALE_H=config/locale/gnu/c_locale.h
1502 CLOCALE_CC=config/locale/gnu/c_locale.cc
1503 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1504 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1505 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1506 CMESSAGES_H=config/locale/gnu/messages_members.h
1507 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1508 CMONEY_CC=config/locale/gnu/monetary_members.cc
1509 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1510 CTIME_H=config/locale/gnu/time_members.h
1511 CTIME_CC=config/locale/gnu/time_members.cc
1512 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1515 AC_MSG_RESULT(IEEE 1003.1)
1517 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1518 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1519 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1520 CCOLLATE_CC=config/locale/generic/collate_members.cc
1521 CCTYPE_CC=config/locale/generic/ctype_members.cc
1522 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1523 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1524 CMONEY_CC=config/locale/generic/monetary_members.cc
1525 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1526 CTIME_H=config/locale/generic/time_members.h
1527 CTIME_CC=config/locale/generic/time_members.cc
1528 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1532 # This is where the testsuite looks for locale catalogs, using the
1533 # -DLOCALEDIR define during testsuite compilation.
1534 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1535 AC_SUBST(glibcxx_localedir)
1537 # A standalone libintl (e.g., GNU libintl) may be in use.
1538 if test $USE_NLS = yes; then
1539 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1540 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1542 if test $USE_NLS = yes; then
1543 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1544 [Define if NLS translations are to be used.])
1549 AC_SUBST(CMESSAGES_H)
1550 AC_SUBST(CCODECVT_CC)
1551 AC_SUBST(CCOLLATE_CC)
1553 AC_SUBST(CMESSAGES_CC)
1555 AC_SUBST(CNUMERIC_CC)
1558 AC_SUBST(CLOCALE_CC)
1559 AC_SUBST(CLOCALE_INTERNAL_H)
1564 dnl Check for which std::allocator base class to use. The choice is
1565 dnl mapped from a subdirectory of include/ext.
1569 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1570 AC_MSG_CHECKING([for std::allocator base class])
1571 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1572 [use KIND for target std::allocator base],
1573 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1575 # If they didn't use this option switch, or if they specified --enable
1576 # with no specific model, we'll have to look for one. If they
1577 # specified --disable (???), do likewise.
1578 if test $enable_libstdcxx_allocator = no ||
1579 test $enable_libstdcxx_allocator = yes;
1581 enable_libstdcxx_allocator=auto
1584 # Either a known package, or "auto". Auto implies the default choice
1585 # for a particular platform.
1586 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1588 # Probe for host-specific support if no specific model is specified.
1590 if test $enable_libstdcxx_allocator_flag = auto; then
1591 case ${target_os} in
1592 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1593 enable_libstdcxx_allocator_flag=new
1596 enable_libstdcxx_allocator_flag=new
1600 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1603 # Set configure bits for specified locale package
1604 case ${enable_libstdcxx_allocator_flag} in
1606 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1607 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1610 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1611 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1614 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1615 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1618 ALLOCATOR_H=config/allocator/new_allocator_base.h
1619 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1622 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1623 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1627 AC_SUBST(ALLOCATOR_H)
1628 AC_SUBST(ALLOCATOR_NAME)
1633 dnl Check for whether the Boost-derived checks should be turned on.
1635 dnl --enable-concept-checks turns them on.
1636 dnl --disable-concept-checks leaves them off.
1637 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1638 dnl Where DEFAULT is either `yes' or `no'.
1640 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1641 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1642 if test $enable_concept_checks = yes; then
1643 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1644 [Define to use concept checking code from the boost libraries.])
1650 dnl Check for which I/O library to use: stdio, or something specific.
1652 dnl Default is stdio.
1654 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1655 AC_MSG_CHECKING([for underlying I/O to use])
1656 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1657 [use target-specific I/O package], [permit stdio])
1659 # Now that libio has been removed, you can have any color you want as long
1660 # as it's black. This is one big no-op until other packages are added, but
1661 # showing the framework never hurts.
1662 case ${enable_cstdio} in
1664 CSTDIO_H=config/io/c_io_stdio.h
1665 BASIC_FILE_H=config/io/basic_file_stdio.h
1666 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1667 AC_MSG_RESULT(stdio)
1672 AC_SUBST(BASIC_FILE_H)
1673 AC_SUBST(BASIC_FILE_CC)
1678 dnl Check for "unusual" flags to pass to the compiler while building.
1680 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1681 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1682 dnl --disable-cxx-flags passes nothing.
1683 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1684 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1685 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1686 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1687 dnl If "default flags" is an empty string, the effect is the same
1688 dnl as --disable or --enable=no.
1690 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1691 AC_MSG_CHECKING([for extra compiler flags for building])
1692 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1693 [pass compiler FLAGS when building library],
1694 [case "x$enable_cxx_flags" in
1695 xno | x) enable_cxx_flags= ;;
1697 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1700 # Run through flags (either default or command-line) and set anything
1701 # extra (e.g., #defines) that must accompany particular g++ options.
1702 if test -n "$enable_cxx_flags"; then
1703 for f in $enable_cxx_flags; do
1707 *) # and we're trying to pass /what/ exactly?
1708 AC_MSG_ERROR([compiler flags start with a -]) ;;
1713 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1714 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1715 AC_SUBST(EXTRA_CXX_FLAGS)
1720 dnl Check to see if debugging libraries are to be built.
1722 dnl --enable-libstdcxx-debug
1723 dnl builds a separate set of debugging libraries in addition to the
1724 dnl normal (shared, static) libstdc++ binaries.
1726 dnl --disable-libstdcxx-debug
1727 dnl builds only one (non-debug) version of libstdc++.
1729 dnl --enable-libstdcxx-debug-flags=FLAGS
1730 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1732 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1733 dnl Where DEFAULT is either `yes' or `no'.
1735 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1736 AC_MSG_CHECKING([for additional debug build])
1737 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1738 AC_MSG_RESULT($enable_libstdcxx_debug)
1739 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1744 dnl Check for explicit debug flags.
1746 dnl --enable-libstdcxx-debug-flags='-O1'
1747 dnl is a general method for passing flags to be used when
1748 dnl building debug libraries with --enable-debug.
1750 dnl --disable-libstdcxx-debug-flags does nothing.
1751 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1752 dnl If "default flags" is an empty string, the effect is the same
1753 dnl as --disable or --enable=no.
1755 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1756 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1757 [pass compiler FLAGS when building debug library],
1758 [case "x$enable_libstdcxx_debug_flags" in
1759 xno | x) enable_libstdcxx_debug_flags= ;;
1761 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1764 # Option parsed, now set things appropriately
1765 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1766 AC_SUBST(DEBUG_FLAGS)
1768 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1773 dnl Check if the user only wants a freestanding library implementation.
1775 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1776 dnl installing only the headers required by [17.4.1.3] and the language
1777 dnl support library. More than that will be built (to keep the Makefiles
1778 dnl conveniently clean), but not installed.
1781 dnl is_hosted (yes/no)
1784 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1786 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1787 AC_ARG_ENABLE([hosted-libstdcxx],
1788 AC_HELP_STRING([--disable-hosted-libstdcxx],
1789 [only build freestanding C++ runtime support]),,
1792 enable_hosted_libstdcxx=no
1795 enable_hosted_libstdcxx=yes
1798 if test "$enable_hosted_libstdcxx" = no; then
1799 AC_MSG_NOTICE([Only freestanding libraries will be built])
1803 enable_libstdcxx_pch=no
1808 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1809 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1810 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1815 dnl Check for template specializations for the 'long long' type.
1816 dnl The result determines only whether 'long long' I/O is enabled; things
1817 dnl like numeric_limits<> specializations are always available.
1819 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1820 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1821 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1822 dnl Where DEFAULT is either `yes' or `no'.
1824 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1825 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1826 if test $enable_long_long = yes; then
1827 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1828 [Define if code specialized for long long should be used.])
1830 AC_MSG_CHECKING([for enabled long long specializations])
1831 AC_MSG_RESULT([$enable_long_long])
1836 dnl Check for template specializations for the 'wchar_t' type.
1838 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1839 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1840 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1841 dnl Where DEFAULT is either `yes' or `no'.
1843 dnl Necessary support must also be present.
1845 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1846 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1848 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1849 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1850 AC_MSG_CHECKING([for mbstate_t])
1851 AC_TRY_COMPILE([#include <wchar.h>],
1852 [mbstate_t teststate;],
1853 have_mbstate_t=yes, have_mbstate_t=no)
1854 AC_MSG_RESULT($have_mbstate_t)
1855 if test x"$have_mbstate_t" = xyes; then
1856 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1859 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1861 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1863 if test x"$enable_wchar_t" = x"yes"; then
1868 if test x"$ac_has_wchar_h" = xyes &&
1869 test x"$ac_has_wctype_h" = xyes; then
1870 AC_TRY_COMPILE([#include <wchar.h>
1931 ],[],[], [enable_wchar_t=no])
1939 if test x"$enable_wchar_t" = x"yes"; then
1940 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1941 [Define if code specialized for wchar_t should be used.])
1944 AC_MSG_CHECKING([for enabled wchar_t specializations])
1945 AC_MSG_RESULT([$enable_wchar_t])
1950 dnl Check to see if building and using a C++ precompiled header can be done.
1952 dnl --enable-libstdcxx-pch=yes
1953 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1954 dnl may work, after some light-hearted attempts to puzzle out compiler
1955 dnl support, flip bits on in include/Makefile.am
1957 dnl --disable-libstdcxx-pch
1958 dnl turns off attempts to use or build stdc++.h.gch.
1961 dnl glibcxx_PCHFLAGS
1963 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1964 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1965 if test $enable_libstdcxx_pch = yes; then
1966 AC_CACHE_CHECK([for compiler with PCH support],
1967 [glibcxx_cv_prog_CXX_pch],
1968 [ac_save_CXXFLAGS="$CXXFLAGS"
1969 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1972 echo '#include <math.h>' > conftest.h
1973 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1974 -o conftest.h.gch 1>&5 2>&1 &&
1975 echo '#error "pch failed"' > conftest.h &&
1976 echo '#include "conftest.h"' > conftest.cc &&
1977 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1979 glibcxx_cv_prog_CXX_pch=yes
1981 glibcxx_cv_prog_CXX_pch=no
1984 CXXFLAGS=$ac_save_CXXFLAGS
1987 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1990 AC_MSG_CHECKING([for enabled PCH])
1991 AC_MSG_RESULT([$enable_libstdcxx_pch])
1993 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1994 if test $enable_libstdcxx_pch = yes; then
1995 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
1999 AC_SUBST(glibcxx_PCHFLAGS)
2004 dnl Check for atomic builtins.
2006 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2008 dnl This checks to see if the host supports the compiler-generated
2009 dnl builtins for atomic operations. Note, this is intended to be an
2010 dnl all-or-nothing switch, so all the atomic operations that are used
2011 dnl should be checked.
2014 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2015 dnl see: CHECK_SYNC_FETCH_AND_ADD
2018 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
2020 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2021 AC_MSG_CHECKING([for atomic builtins])
2025 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2026 cat > conftest.$ac_ext << EOF
2027 [#]line __oline__ "configure"
2030 // NB: _Atomic_word not necessarily int.
2031 typedef int atomic_type;
2034 const atomic_type c3(0);
2035 if (__sync_fetch_and_add(&c1, c2) == c3)
2042 old_CXXFLAGS="$CXXFLAGS"
2044 if AC_TRY_EVAL(ac_compile); then
2045 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2046 enable_atomic_builtins=no
2048 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2049 [Define if builtin atomic operations are supported on this host.])
2050 enable_atomic_builtins=yes
2051 atomicity_dir=cpu/generic/atomicity_builtins
2054 CXXFLAGS="$old_CXXFLAGS"
2057 # Now, if still generic, set to mutex.
2058 if test $atomicity_dir = "cpu/generic" ; then
2059 atomicity_dir=cpu/generic/atomicity_mutex
2062 AC_MSG_RESULT($enable_atomic_builtins)
2067 dnl Check for exception handling support. If an explicit enable/disable
2068 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2069 dnl target may or may not support call frame exceptions.
2071 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2072 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2073 dnl Neither one forces an attempt at detection.
2076 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2078 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2079 AC_MSG_CHECKING([for exception model to use])
2082 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2083 [force use of builtin_setjmp for exceptions],
2084 [permit yes|no|auto])
2086 if test $enable_sjlj_exceptions = auto; then
2087 # Botheration. Now we've got to detect the exception model. Link tests
2088 # against libgcc.a are problematic since we've not been given proper -L
2089 # bits for single-tree newlib and libgloss.
2091 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2092 cat > conftest.$ac_ext << EOF
2093 [#]line __oline__ "configure"
2102 old_CXXFLAGS="$CXXFLAGS"
2104 if AC_TRY_EVAL(ac_compile); then
2105 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2106 enable_sjlj_exceptions=yes
2107 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2108 enable_sjlj_exceptions=no
2109 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2110 enable_sjlj_exceptions=no
2113 CXXFLAGS="$old_CXXFLAGS"
2117 # This is a tad weird, for hysterical raisins. We have to map
2118 # enable/disable to two different models.
2119 case $enable_sjlj_exceptions in
2121 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2122 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2123 ac_exception_model_name=sjlj
2126 ac_exception_model_name="call frame"
2129 AC_MSG_ERROR([unable to detect exception model])
2133 AC_MSG_RESULT($ac_exception_model_name)
2138 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2140 dnl --enable-visibility enables attempt to use visibility attributes.
2141 dnl --disable-visibility turns off all use of visibility attributes.
2142 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2143 dnl Where DEFAULT is 'yes'.
2145 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2146 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2148 if test x$enable_visibility = xyes ; then
2149 dnl all hail libgfortran
2150 dnl Check whether the target supports hidden visibility.
2151 AC_CACHE_CHECK([whether the target supports hidden visibility],
2152 have_attribute_visibility, [
2153 save_CFLAGS="$CFLAGS"
2154 CFLAGS="$CFLAGS -Werror"
2155 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2156 [], have_attribute_visibility=yes,
2157 have_attribute_visibility=no)
2158 CFLAGS="$save_CFLAGS"])
2159 if test $have_attribute_visibility = no; then
2160 enable_visibility=no
2164 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2165 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2170 dnl Add version tags to symbols in shared library (or not), additionally
2171 dnl marking other symbols as private/local (or not).
2173 dnl --enable-symvers=style adds a version script to the linker call when
2174 dnl creating the shared library. The choice of version script is
2175 dnl controlled by 'style'.
2176 dnl --disable-symvers does not.
2177 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2178 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2179 dnl choose a default style based on linker characteristics. Passing
2180 dnl 'no' disables versioning.
2182 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2184 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2185 [enables symbol versioning of the shared library],
2186 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2188 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2189 # don't know enough about $LD to do tricks...
2190 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2192 # Turn a 'yes' into a suitable default.
2193 if test x$enable_symvers = xyes ; then
2194 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2197 if test $with_gnu_ld = yes ; then
2200 case ${target_os} in
2202 enable_symvers=darwin ;;
2204 enable_symvers=no ;;
2210 # Check to see if 'darwin' or 'darwin-export' can win.
2211 if test x$enable_symvers = xdarwin-export ; then
2212 enable_symvers=darwin
2215 # Check to see if 'gnu' can win.
2216 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2217 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2218 AC_MSG_CHECKING([for shared libgcc])
2219 ac_save_CFLAGS="$CFLAGS"
2221 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2222 CFLAGS="$ac_save_CFLAGS"
2223 if test $glibcxx_shared_libgcc = no; then
2224 cat > conftest.c <<EOF
2225 int main (void) { return 0; }
2228 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2229 -shared -shared-libgcc -o conftest.so \
2230 conftest.c -v 2>&1 >/dev/null \
2231 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2233 rm -f conftest.c conftest.so
2234 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2235 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2236 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2237 CFLAGS="$ac_save_CFLAGS"
2240 AC_MSG_RESULT($glibcxx_shared_libgcc)
2242 # For GNU ld, we need at least this version. The format is described in
2243 # GLIBCXX_CHECK_LINKER_FEATURES above.
2244 glibcxx_min_gnu_ld_version=21400
2246 # If no shared libgcc, can't win.
2247 if test $glibcxx_shared_libgcc != yes; then
2248 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2249 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2250 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2252 elif test $with_gnu_ld != yes ; then
2254 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2255 AC_MSG_WARN([=== you are not using the GNU linker.])
2256 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2258 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2259 # The right tools, the right setup, but too old. Fallbacks?
2260 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2261 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2262 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2263 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2264 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2269 # Everything parsed; figure out what file to use.
2270 case $enable_symvers in
2272 SYMVER_FILE=config/abi/pre/none.ver
2275 SYMVER_FILE=config/abi/pre/gnu.ver
2276 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2277 [Define to use GNU versioning in the shared library.])
2279 gnu-versioned-namespace)
2280 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2281 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2282 [Define to use GNU namespace versioning in the shared library.])
2285 SYMVER_FILE=config/abi/pre/gnu.ver
2286 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2287 [Define to use darwin versioning in the shared library.])
2291 if test x$enable_symvers != xno ; then
2292 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2293 [Define to use symbol versioning in the shared library.])
2296 AC_SUBST(SYMVER_FILE)
2297 AC_SUBST(port_specific_symbol_files)
2298 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2299 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2300 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2301 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2302 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2304 # Now, set up compatibility support, if any.
2305 # In addition, need this to deal with std::size_t mangling in
2306 # src/compatibility.cc. In a perfect world, could use
2307 # typeid(std::size_t).name()[0] to do direct substitution.
2308 AC_MSG_CHECKING([for size_t as unsigned int])
2309 ac_save_CFLAGS="$CFLAGS"
2311 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2312 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2313 CFLAGS=$ac_save_CFLAGS
2314 if test "$glibcxx_size_t_is_i" = yes; then
2315 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2317 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2319 AC_MSG_CHECKING([for ptrdiff_t as int])
2320 ac_save_CFLAGS="$CFLAGS"
2322 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2323 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2324 CFLAGS=$ac_save_CFLAGS
2325 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2326 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2328 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2333 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2334 dnl We must stage the required headers so that they will be installed
2335 dnl with the library (unlike libgcc, the STL implementation is provided
2336 dnl solely within headers). Since we must not inject random user-space
2337 dnl macro names into user-provided C++ code, we first stage into <file>-in
2338 dnl and process to <file> with an output command. The reason for a two-
2339 dnl stage process here is to correctly handle $srcdir!=$objdir without
2340 dnl having to write complex code (the sed commands to clean the macro
2341 dnl namespace are complex and fragile enough as it is). We must also
2342 dnl add a relative path so that -I- is supported properly.
2345 dnl glibcxx_thread_h
2348 dnl HAVE_GTHR_DEFAULT
2350 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2351 AC_MSG_CHECKING([for thread model used by GCC])
2352 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2353 AC_MSG_RESULT([$target_thread_file])
2355 if test $target_thread_file != single; then
2356 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2357 [Define if gthr-default.h exists
2358 (meaning that threading support is enabled).])
2361 glibcxx_thread_h=gthr-$target_thread_file.h
2363 dnl Check for __GTHREADS define.
2364 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2365 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2371 AC_SUBST(glibcxx_thread_h)
2375 # Check whether LC_MESSAGES is available in <locale.h>.
2376 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2378 # This file file be copied and used freely without restrictions. It can
2379 # be used in projects which are not available under the GNU Public License
2380 # but which still want to provide support for the GNU gettext functionality.
2381 # Please note that the actual code is *not* freely available.
2384 AC_DEFUN([AC_LC_MESSAGES], [
2385 AC_CHECK_HEADER(locale.h, [
2386 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2387 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2388 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2389 if test $ac_cv_val_LC_MESSAGES = yes; then
2390 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2391 [Define if LC_MESSAGES is available in <locale.h>.])
2396 # Macros from the top-level gcc directory.
2397 m4_include([../config/tls.m4])