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"$ac_system_error2" = x"yes"; then
1282 AC_DEFINE(HAVE_ENOTRECOVERABLE, 1, [Define if ENOTRECOVERABLE exists.])
1285 AC_MSG_CHECKING([for ENOLINK])
1286 AC_CACHE_VAL(ac_system_error3, [
1287 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOLINK; ],
1288 [ac_system_error3=yes], [ac_system_error3=no])
1290 AC_MSG_RESULT($ac_system_error3)
1291 if test x"$ac_system_error3" = x"yes"; then
1292 AC_DEFINE(HAVE_ENOLINK, 1, [Define if ENOLINK exists.])
1295 AC_MSG_CHECKING([for EPROTO])
1296 AC_CACHE_VAL(ac_system_error_4, [
1297 AC_TRY_COMPILE([#include <errno.h>], [ int i = EPROTO; ],
1298 [ac_system_error_4=yes], [ac_system_error_4=no])
1300 AC_MSG_RESULT($ac_system_error_4)
1301 if test x"$ac_system_error_4" = x"yes"; then
1302 AC_DEFINE(HAVE_EPROTO, 1, [Define if EPROTO exists.])
1305 AC_MSG_CHECKING([for ENODATA])
1306 AC_CACHE_VAL(ac_system_error_5, [
1307 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENODATA; ],
1308 [ac_system_error_5=yes], [ac_system_error_5=no])
1310 AC_MSG_RESULT($ac_system_error_5)
1311 if test x"$ac_system_error_5" = x"yes"; then
1312 AC_DEFINE(HAVE_ENODATA, 1, [Define if ENODATA exists.])
1315 AC_MSG_CHECKING([for ENOSR])
1316 AC_CACHE_VAL(ac_system_error_6, [
1317 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSR; ],
1318 [ac_system_error_6=yes], [ac_system_error_6=no])
1320 AC_MSG_RESULT($ac_system_error_6)
1321 if test x"$ac_system_error_6" = x"yes"; then
1322 AC_DEFINE(HAVE_ENOSR, 1, [Define if ENOSR exists.])
1325 AC_MSG_CHECKING([for ENOSTR])
1326 AC_CACHE_VAL(ac_system_error_7, [
1327 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSTR; ],
1328 [ac_system_error_7=yes], [ac_system_error_7=no])
1330 AC_MSG_RESULT($ac_system_error_7)
1331 if test x"$ac_system_error_7" = x"yes"; then
1332 AC_DEFINE(HAVE_ENOSTR, 1, [Define if ENOSTR exists.])
1335 AC_MSG_CHECKING([for ETIME])
1336 AC_CACHE_VAL(ac_system_error_8, [
1337 AC_TRY_COMPILE([#include <errno.h>], [ int i = ETIME; ],
1338 [ac_system_error_8=yes], [ac_system_error_8=no])
1340 AC_MSG_RESULT($ac_system_error_8)
1341 if test x"$ac_system_error_8" = x"yes"; then
1342 AC_DEFINE(HAVE_ETIME, 1, [Define if ETIME exists.])
1345 AC_MSG_CHECKING([for sys_nerr])
1346 AC_CACHE_VAL(ac_system_error9, [
1347 AC_TRY_COMPILE([#include <errno.h> ], [ int i = sys_nerr; ],
1348 [ac_system_error9=yes], [ac_system_error9=no])
1350 AC_MSG_RESULT($ac_system_error9)
1351 if test x"$ac_system_error9" = x"yes"; then
1352 AC_DEFINE(HAVE_SYS_NERR, 1, [Define if sys_nerr exists.])
1357 dnl Check for what type of C headers to use.
1359 dnl --enable-cheaders= [does stuff].
1360 dnl --disable-cheaders [does not do anything, really].
1361 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1362 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1364 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1365 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1366 [construct "C" headers for g++], [permit c|c_std|c_global])
1367 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1369 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1371 # Allow overrides to configure.host here.
1372 if test $enable_cheaders = c_global; then
1376 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1380 AC_SUBST(C_INCLUDE_DIR)
1381 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1382 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1383 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1384 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1385 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1390 dnl Check for which locale library to use. The choice is mapped to
1391 dnl a subdirectory of config/locale.
1393 dnl Default is generic.
1395 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1396 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1397 [use MODEL for target locale package],
1398 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1400 # Deal with gettext issues. Default to not using it (=no) until we detect
1401 # support for it later. Let the user turn it off via --e/d, but let that
1402 # default to on for easier handling.
1405 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1409 # Either a known packaage, or "auto"
1410 if test $enable_clocale = no || test $enable_clocale = yes; then
1413 enable_clocale_flag=$enable_clocale
1415 # Probe for locale model to use if none specified.
1416 # Default to "generic".
1417 if test $enable_clocale_flag = auto; then
1418 case ${target_os} in
1419 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1420 enable_clocale_flag=gnu
1423 enable_clocale_flag=darwin
1426 enable_clocale_flag=generic
1431 # Sanity check model, and test for special functionality.
1432 if test $enable_clocale_flag = gnu; then
1433 AC_EGREP_CPP([_GLIBCXX_ok], [
1434 #include <features.h>
1435 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1438 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1440 if test $enable_clocale = auto; then
1441 # Test for bugs early in glibc-2.2.x series
1443 #define _GNU_SOURCE 1
1446 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1447 extern __typeof(newlocale) __newlocale;
1448 extern __typeof(duplocale) __duplocale;
1449 extern __typeof(strcoll_l) __strcoll_l;
1453 const char __one[] = "Äuglein Augmen";
1454 const char __two[] = "Äuglein";
1459 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1460 loc_dup = __duplocale(loc);
1461 i = __strcoll_l(__one, __two, loc);
1462 j = __strcoll_l(__one, __two, loc_dup);
1466 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1467 [enable_clocale_flag=generic])
1470 # Set it to scream when it hurts.
1471 ac_save_CFLAGS="$CFLAGS"
1472 CFLAGS="-Wimplicit-function-declaration -Werror"
1474 # Use strxfrm_l if available.
1475 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1477 #include <locale.h>],
1478 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1479 AC_DEFINE(HAVE_STRXFRM_L, 1,
1480 [Define if strxfrm_l is available in <string.h>.]),)
1482 # Use strerror_l if available.
1483 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1485 #include <locale.h>],
1486 [__locale_t loc; strerror_l(5, loc);],
1487 AC_DEFINE(HAVE_STRERROR_L, 1,
1488 [Define if strerror_l is available in <string.h>.]),)
1490 CFLAGS="$ac_save_CFLAGS"
1493 # Perhaps use strerror_r if available, and strerror_l isn't.
1494 ac_save_CFLAGS="$CFLAGS"
1495 CFLAGS="-Wimplicit-function-declaration -Werror"
1496 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1498 #include <locale.h>],
1499 [char s[128]; strerror_r(5, s, 128);],
1500 AC_DEFINE(HAVE_STRERROR_R, 1,
1501 [Define if strerror_r is available in <string.h>.]),)
1502 CFLAGS="$ac_save_CFLAGS"
1504 # Set configure bits for specified locale package
1505 AC_MSG_CHECKING([for C locale to use])
1506 case ${enable_clocale_flag} in
1508 AC_MSG_RESULT(generic)
1510 CLOCALE_H=config/locale/generic/c_locale.h
1511 CLOCALE_CC=config/locale/generic/c_locale.cc
1512 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1513 CCOLLATE_CC=config/locale/generic/collate_members.cc
1514 CCTYPE_CC=config/locale/generic/ctype_members.cc
1515 CMESSAGES_H=config/locale/generic/messages_members.h
1516 CMESSAGES_CC=config/locale/generic/messages_members.cc
1517 CMONEY_CC=config/locale/generic/monetary_members.cc
1518 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1519 CTIME_H=config/locale/generic/time_members.h
1520 CTIME_CC=config/locale/generic/time_members.cc
1521 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1524 AC_MSG_RESULT(darwin or freebsd)
1526 CLOCALE_H=config/locale/generic/c_locale.h
1527 CLOCALE_CC=config/locale/generic/c_locale.cc
1528 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1529 CCOLLATE_CC=config/locale/generic/collate_members.cc
1530 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1531 CMESSAGES_H=config/locale/generic/messages_members.h
1532 CMESSAGES_CC=config/locale/generic/messages_members.cc
1533 CMONEY_CC=config/locale/generic/monetary_members.cc
1534 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1535 CTIME_H=config/locale/generic/time_members.h
1536 CTIME_CC=config/locale/generic/time_members.cc
1537 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1543 # Declare intention to use gettext, and add support for specific
1545 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1548 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1549 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1550 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1553 # Export the build objects.
1554 for ling in $ALL_LINGUAS; do \
1555 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1556 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1558 AC_SUBST(glibcxx_MOFILES)
1559 AC_SUBST(glibcxx_POFILES)
1561 CLOCALE_H=config/locale/gnu/c_locale.h
1562 CLOCALE_CC=config/locale/gnu/c_locale.cc
1563 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1564 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1565 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1566 CMESSAGES_H=config/locale/gnu/messages_members.h
1567 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1568 CMONEY_CC=config/locale/gnu/monetary_members.cc
1569 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1570 CTIME_H=config/locale/gnu/time_members.h
1571 CTIME_CC=config/locale/gnu/time_members.cc
1572 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1575 AC_MSG_RESULT(IEEE 1003.1)
1577 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1578 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1579 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1580 CCOLLATE_CC=config/locale/generic/collate_members.cc
1581 CCTYPE_CC=config/locale/generic/ctype_members.cc
1582 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1583 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1584 CMONEY_CC=config/locale/generic/monetary_members.cc
1585 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1586 CTIME_H=config/locale/generic/time_members.h
1587 CTIME_CC=config/locale/generic/time_members.cc
1588 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1592 # This is where the testsuite looks for locale catalogs, using the
1593 # -DLOCALEDIR define during testsuite compilation.
1594 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1595 AC_SUBST(glibcxx_localedir)
1597 # A standalone libintl (e.g., GNU libintl) may be in use.
1598 if test $USE_NLS = yes; then
1599 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1600 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1602 if test $USE_NLS = yes; then
1603 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1604 [Define if NLS translations are to be used.])
1609 AC_SUBST(CMESSAGES_H)
1610 AC_SUBST(CCODECVT_CC)
1611 AC_SUBST(CCOLLATE_CC)
1613 AC_SUBST(CMESSAGES_CC)
1615 AC_SUBST(CNUMERIC_CC)
1618 AC_SUBST(CLOCALE_CC)
1619 AC_SUBST(CLOCALE_INTERNAL_H)
1624 dnl Check for which std::allocator base class to use. The choice is
1625 dnl mapped from a subdirectory of include/ext.
1629 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1630 AC_MSG_CHECKING([for std::allocator base class])
1631 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1632 [use KIND for target std::allocator base],
1633 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1635 # If they didn't use this option switch, or if they specified --enable
1636 # with no specific model, we'll have to look for one. If they
1637 # specified --disable (???), do likewise.
1638 if test $enable_libstdcxx_allocator = no ||
1639 test $enable_libstdcxx_allocator = yes;
1641 enable_libstdcxx_allocator=auto
1644 # Either a known package, or "auto". Auto implies the default choice
1645 # for a particular platform.
1646 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1648 # Probe for host-specific support if no specific model is specified.
1650 if test $enable_libstdcxx_allocator_flag = auto; then
1651 case ${target_os} in
1652 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1653 enable_libstdcxx_allocator_flag=new
1656 enable_libstdcxx_allocator_flag=new
1660 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1663 # Set configure bits for specified locale package
1664 case ${enable_libstdcxx_allocator_flag} in
1666 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1667 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1670 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1671 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1674 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1675 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1678 ALLOCATOR_H=config/allocator/new_allocator_base.h
1679 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1682 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1683 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1687 AC_SUBST(ALLOCATOR_H)
1688 AC_SUBST(ALLOCATOR_NAME)
1693 dnl Check for whether the Boost-derived checks should be turned on.
1695 dnl --enable-concept-checks turns them on.
1696 dnl --disable-concept-checks leaves them off.
1697 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1698 dnl Where DEFAULT is either `yes' or `no'.
1700 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1701 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1702 if test $enable_concept_checks = yes; then
1703 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1704 [Define to use concept checking code from the boost libraries.])
1710 dnl Check for which I/O library to use: stdio, or something specific.
1712 dnl Default is stdio.
1714 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1715 AC_MSG_CHECKING([for underlying I/O to use])
1716 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1717 [use target-specific I/O package], [permit stdio])
1719 # Now that libio has been removed, you can have any color you want as long
1720 # as it's black. This is one big no-op until other packages are added, but
1721 # showing the framework never hurts.
1722 case ${enable_cstdio} in
1724 CSTDIO_H=config/io/c_io_stdio.h
1725 BASIC_FILE_H=config/io/basic_file_stdio.h
1726 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1727 AC_MSG_RESULT(stdio)
1732 AC_SUBST(BASIC_FILE_H)
1733 AC_SUBST(BASIC_FILE_CC)
1738 dnl Check for "unusual" flags to pass to the compiler while building.
1740 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1741 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1742 dnl --disable-cxx-flags passes nothing.
1743 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1744 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1745 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1746 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1747 dnl If "default flags" is an empty string, the effect is the same
1748 dnl as --disable or --enable=no.
1750 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1751 AC_MSG_CHECKING([for extra compiler flags for building])
1752 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1753 [pass compiler FLAGS when building library],
1754 [case "x$enable_cxx_flags" in
1755 xno | x) enable_cxx_flags= ;;
1757 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1760 # Run through flags (either default or command-line) and set anything
1761 # extra (e.g., #defines) that must accompany particular g++ options.
1762 if test -n "$enable_cxx_flags"; then
1763 for f in $enable_cxx_flags; do
1767 *) # and we're trying to pass /what/ exactly?
1768 AC_MSG_ERROR([compiler flags start with a -]) ;;
1773 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1774 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1775 AC_SUBST(EXTRA_CXX_FLAGS)
1780 dnl Check to see if debugging libraries are to be built.
1782 dnl --enable-libstdcxx-debug
1783 dnl builds a separate set of debugging libraries in addition to the
1784 dnl normal (shared, static) libstdc++ binaries.
1786 dnl --disable-libstdcxx-debug
1787 dnl builds only one (non-debug) version of libstdc++.
1789 dnl --enable-libstdcxx-debug-flags=FLAGS
1790 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1792 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1793 dnl Where DEFAULT is either `yes' or `no'.
1795 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1796 AC_MSG_CHECKING([for additional debug build])
1797 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1798 AC_MSG_RESULT($enable_libstdcxx_debug)
1799 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1804 dnl Check for explicit debug flags.
1806 dnl --enable-libstdcxx-debug-flags='-O1'
1807 dnl is a general method for passing flags to be used when
1808 dnl building debug libraries with --enable-debug.
1810 dnl --disable-libstdcxx-debug-flags does nothing.
1811 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1812 dnl If "default flags" is an empty string, the effect is the same
1813 dnl as --disable or --enable=no.
1815 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1816 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1817 [pass compiler FLAGS when building debug library],
1818 [case "x$enable_libstdcxx_debug_flags" in
1819 xno | x) enable_libstdcxx_debug_flags= ;;
1821 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1824 # Option parsed, now set things appropriately
1825 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1826 AC_SUBST(DEBUG_FLAGS)
1828 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1833 dnl Check if the user only wants a freestanding library implementation.
1835 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1836 dnl installing only the headers required by [17.4.1.3] and the language
1837 dnl support library. More than that will be built (to keep the Makefiles
1838 dnl conveniently clean), but not installed.
1841 dnl is_hosted (yes/no)
1844 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1846 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1847 AC_ARG_ENABLE([hosted-libstdcxx],
1848 AC_HELP_STRING([--disable-hosted-libstdcxx],
1849 [only build freestanding C++ runtime support]),,
1852 enable_hosted_libstdcxx=no
1855 enable_hosted_libstdcxx=yes
1858 if test "$enable_hosted_libstdcxx" = no; then
1859 AC_MSG_NOTICE([Only freestanding libraries will be built])
1863 enable_libstdcxx_pch=no
1868 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1869 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1870 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1875 dnl Check for template specializations for the 'long long' type.
1876 dnl The result determines only whether 'long long' I/O is enabled; things
1877 dnl like numeric_limits<> specializations are always available.
1879 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1880 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1881 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1882 dnl Where DEFAULT is either `yes' or `no'.
1884 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1885 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1886 if test $enable_long_long = yes; then
1887 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1888 [Define if code specialized for long long should be used.])
1890 AC_MSG_CHECKING([for enabled long long specializations])
1891 AC_MSG_RESULT([$enable_long_long])
1896 dnl Check for template specializations for the 'wchar_t' type.
1898 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1899 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1900 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1901 dnl Where DEFAULT is either `yes' or `no'.
1903 dnl Necessary support must also be present.
1905 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1906 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1908 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1909 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1910 AC_MSG_CHECKING([for mbstate_t])
1911 AC_TRY_COMPILE([#include <wchar.h>],
1912 [mbstate_t teststate;],
1913 have_mbstate_t=yes, have_mbstate_t=no)
1914 AC_MSG_RESULT($have_mbstate_t)
1915 if test x"$have_mbstate_t" = xyes; then
1916 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1919 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1921 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1923 if test x"$enable_wchar_t" = x"yes"; then
1928 if test x"$ac_has_wchar_h" = xyes &&
1929 test x"$ac_has_wctype_h" = xyes; then
1930 AC_TRY_COMPILE([#include <wchar.h>
1991 ],[],[], [enable_wchar_t=no])
1999 if test x"$enable_wchar_t" = x"yes"; then
2000 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2001 [Define if code specialized for wchar_t should be used.])
2004 AC_MSG_CHECKING([for enabled wchar_t specializations])
2005 AC_MSG_RESULT([$enable_wchar_t])
2010 dnl Check to see if building and using a C++ precompiled header can be done.
2012 dnl --enable-libstdcxx-pch=yes
2013 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2014 dnl may work, after some light-hearted attempts to puzzle out compiler
2015 dnl support, flip bits on in include/Makefile.am
2017 dnl --disable-libstdcxx-pch
2018 dnl turns off attempts to use or build stdc++.h.gch.
2021 dnl glibcxx_PCHFLAGS
2023 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2024 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2025 if test $enable_libstdcxx_pch = yes; then
2026 AC_CACHE_CHECK([for compiler with PCH support],
2027 [glibcxx_cv_prog_CXX_pch],
2028 [ac_save_CXXFLAGS="$CXXFLAGS"
2029 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2032 echo '#include <math.h>' > conftest.h
2033 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2034 -o conftest.h.gch 1>&5 2>&1 &&
2035 echo '#error "pch failed"' > conftest.h &&
2036 echo '#include "conftest.h"' > conftest.cc &&
2037 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2039 glibcxx_cv_prog_CXX_pch=yes
2041 glibcxx_cv_prog_CXX_pch=no
2044 CXXFLAGS=$ac_save_CXXFLAGS
2047 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2050 AC_MSG_CHECKING([for enabled PCH])
2051 AC_MSG_RESULT([$enable_libstdcxx_pch])
2053 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2054 if test $enable_libstdcxx_pch = yes; then
2055 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
2059 AC_SUBST(glibcxx_PCHFLAGS)
2064 dnl Check for atomic builtins.
2066 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2068 dnl This checks to see if the host supports the compiler-generated
2069 dnl builtins for atomic operations. Note, this is intended to be an
2070 dnl all-or-nothing switch, so all the atomic operations that are used
2071 dnl should be checked.
2074 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2075 dnl see: CHECK_SYNC_FETCH_AND_ADD
2078 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
2080 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2081 AC_MSG_CHECKING([for atomic builtins])
2085 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2086 cat > conftest.$ac_ext << EOF
2087 [#]line __oline__ "configure"
2090 // NB: _Atomic_word not necessarily int.
2091 typedef int atomic_type;
2094 const atomic_type c3(0);
2095 if (__sync_fetch_and_add(&c1, c2) == c3)
2102 old_CXXFLAGS="$CXXFLAGS"
2104 if AC_TRY_EVAL(ac_compile); then
2105 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2106 enable_atomic_builtins=no
2108 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2109 [Define if builtin atomic operations are supported on this host.])
2110 enable_atomic_builtins=yes
2111 atomicity_dir=cpu/generic/atomicity_builtins
2114 CXXFLAGS="$old_CXXFLAGS"
2117 # Now, if still generic, set to mutex.
2118 if test $atomicity_dir = "cpu/generic" ; then
2119 atomicity_dir=cpu/generic/atomicity_mutex
2122 AC_MSG_RESULT($enable_atomic_builtins)
2127 dnl Check for exception handling support. If an explicit enable/disable
2128 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2129 dnl target may or may not support call frame exceptions.
2131 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2132 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2133 dnl Neither one forces an attempt at detection.
2136 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2138 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2139 AC_MSG_CHECKING([for exception model to use])
2142 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2143 [force use of builtin_setjmp for exceptions],
2144 [permit yes|no|auto])
2146 if test $enable_sjlj_exceptions = auto; then
2147 # Botheration. Now we've got to detect the exception model. Link tests
2148 # against libgcc.a are problematic since we've not been given proper -L
2149 # bits for single-tree newlib and libgloss.
2151 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2152 cat > conftest.$ac_ext << EOF
2153 [#]line __oline__ "configure"
2162 old_CXXFLAGS="$CXXFLAGS"
2164 if AC_TRY_EVAL(ac_compile); then
2165 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2166 enable_sjlj_exceptions=yes
2167 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2168 enable_sjlj_exceptions=no
2169 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2170 enable_sjlj_exceptions=no
2173 CXXFLAGS="$old_CXXFLAGS"
2177 # This is a tad weird, for hysterical raisins. We have to map
2178 # enable/disable to two different models.
2179 case $enable_sjlj_exceptions in
2181 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2182 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2183 ac_exception_model_name=sjlj
2186 ac_exception_model_name="call frame"
2189 AC_MSG_ERROR([unable to detect exception model])
2193 AC_MSG_RESULT($ac_exception_model_name)
2198 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2200 dnl --enable-visibility enables attempt to use visibility attributes.
2201 dnl --disable-visibility turns off all use of visibility attributes.
2202 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2203 dnl Where DEFAULT is 'yes'.
2205 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2206 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2208 if test x$enable_visibility = xyes ; then
2209 dnl all hail libgfortran
2210 dnl Check whether the target supports hidden visibility.
2211 AC_CACHE_CHECK([whether the target supports hidden visibility],
2212 have_attribute_visibility, [
2213 save_CFLAGS="$CFLAGS"
2214 CFLAGS="$CFLAGS -Werror"
2215 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2216 [], have_attribute_visibility=yes,
2217 have_attribute_visibility=no)
2218 CFLAGS="$save_CFLAGS"])
2219 if test $have_attribute_visibility = no; then
2220 enable_visibility=no
2224 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2225 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2230 dnl Add version tags to symbols in shared library (or not), additionally
2231 dnl marking other symbols as private/local (or not).
2233 dnl --enable-symvers=style adds a version script to the linker call when
2234 dnl creating the shared library. The choice of version script is
2235 dnl controlled by 'style'.
2236 dnl --disable-symvers does not.
2237 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2238 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2239 dnl choose a default style based on linker characteristics. Passing
2240 dnl 'no' disables versioning.
2242 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2244 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2245 [enables symbol versioning of the shared library],
2246 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2248 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2249 # don't know enough about $LD to do tricks...
2250 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2252 # Turn a 'yes' into a suitable default.
2253 if test x$enable_symvers = xyes ; then
2254 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2257 if test $with_gnu_ld = yes ; then
2260 case ${target_os} in
2262 enable_symvers=darwin ;;
2264 enable_symvers=no ;;
2270 # Check to see if 'darwin' or 'darwin-export' can win.
2271 if test x$enable_symvers = xdarwin-export ; then
2272 enable_symvers=darwin
2275 # Check to see if 'gnu' can win.
2276 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2277 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2278 AC_MSG_CHECKING([for shared libgcc])
2279 ac_save_CFLAGS="$CFLAGS"
2281 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2282 CFLAGS="$ac_save_CFLAGS"
2283 if test $glibcxx_shared_libgcc = no; then
2284 cat > conftest.c <<EOF
2285 int main (void) { return 0; }
2288 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2289 -shared -shared-libgcc -o conftest.so \
2290 conftest.c -v 2>&1 >/dev/null \
2291 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2293 rm -f conftest.c conftest.so
2294 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2295 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2296 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2297 CFLAGS="$ac_save_CFLAGS"
2300 AC_MSG_RESULT($glibcxx_shared_libgcc)
2302 # For GNU ld, we need at least this version. The format is described in
2303 # GLIBCXX_CHECK_LINKER_FEATURES above.
2304 glibcxx_min_gnu_ld_version=21400
2306 # If no shared libgcc, can't win.
2307 if test $glibcxx_shared_libgcc != yes; then
2308 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2309 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2310 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2312 elif test $with_gnu_ld != yes ; then
2314 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2315 AC_MSG_WARN([=== you are not using the GNU linker.])
2316 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2318 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2319 # The right tools, the right setup, but too old. Fallbacks?
2320 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2321 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2322 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2323 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2324 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2329 # Everything parsed; figure out what file to use.
2330 case $enable_symvers in
2332 SYMVER_FILE=config/abi/pre/none.ver
2335 SYMVER_FILE=config/abi/pre/gnu.ver
2336 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2337 [Define to use GNU versioning in the shared library.])
2339 gnu-versioned-namespace)
2340 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2341 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2342 [Define to use GNU namespace versioning in the shared library.])
2345 SYMVER_FILE=config/abi/pre/gnu.ver
2346 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2347 [Define to use darwin versioning in the shared library.])
2351 if test x$enable_symvers != xno ; then
2352 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2353 [Define to use symbol versioning in the shared library.])
2356 AC_SUBST(SYMVER_FILE)
2357 AC_SUBST(port_specific_symbol_files)
2358 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2359 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2360 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2361 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2362 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2364 # Now, set up compatibility support, if any.
2365 # In addition, need this to deal with std::size_t mangling in
2366 # src/compatibility.cc. In a perfect world, could use
2367 # typeid(std::size_t).name()[0] to do direct substitution.
2368 AC_MSG_CHECKING([for size_t as unsigned int])
2369 ac_save_CFLAGS="$CFLAGS"
2371 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2372 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2373 CFLAGS=$ac_save_CFLAGS
2374 if test "$glibcxx_size_t_is_i" = yes; then
2375 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2377 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2379 AC_MSG_CHECKING([for ptrdiff_t as int])
2380 ac_save_CFLAGS="$CFLAGS"
2382 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2383 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2384 CFLAGS=$ac_save_CFLAGS
2385 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2386 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2388 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2393 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2394 dnl We must stage the required headers so that they will be installed
2395 dnl with the library (unlike libgcc, the STL implementation is provided
2396 dnl solely within headers). Since we must not inject random user-space
2397 dnl macro names into user-provided C++ code, we first stage into <file>-in
2398 dnl and process to <file> with an output command. The reason for a two-
2399 dnl stage process here is to correctly handle $srcdir!=$objdir without
2400 dnl having to write complex code (the sed commands to clean the macro
2401 dnl namespace are complex and fragile enough as it is). We must also
2402 dnl add a relative path so that -I- is supported properly.
2405 dnl glibcxx_thread_h
2408 dnl HAVE_GTHR_DEFAULT
2410 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2411 AC_MSG_CHECKING([for thread model used by GCC])
2412 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2413 AC_MSG_RESULT([$target_thread_file])
2415 if test $target_thread_file != single; then
2416 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2417 [Define if gthr-default.h exists
2418 (meaning that threading support is enabled).])
2421 glibcxx_thread_h=gthr-$target_thread_file.h
2423 dnl Check for __GTHREADS define.
2424 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2425 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2431 AC_SUBST(glibcxx_thread_h)
2435 # Check whether LC_MESSAGES is available in <locale.h>.
2436 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2438 # This file file be copied and used freely without restrictions. It can
2439 # be used in projects which are not available under the GNU Public License
2440 # but which still want to provide support for the GNU gettext functionality.
2441 # Please note that the actual code is *not* freely available.
2444 AC_DEFUN([AC_LC_MESSAGES], [
2445 AC_CHECK_HEADER(locale.h, [
2446 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2447 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2448 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2449 if test $ac_cv_val_LC_MESSAGES = yes; then
2450 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2451 [Define if LC_MESSAGES is available in <locale.h>.])
2456 # Macros from the top-level gcc directory.
2457 m4_include([../config/tls.m4])