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 # Find platform-specific directories containing configuration info.
129 # Also possibly modify flags used elsewhere, as needed by the platform.
135 dnl Tests for newer compiler features, or features that are present in newer
136 dnl compiler versions but not older compiler versions still in use, should
140 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
141 dnl new inlining code or the new system_header pragma will die on -Werror.
142 dnl Leave it out by default and use maint-mode to use it.
143 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
144 dnl compiler supports it and the user has not requested debug mode.
146 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
147 # All these tests are for C++; save the language and the compiler flags.
148 # The CXXFLAGS thing is suspicious, but based on similar bits previously
149 # found in GLIBCXX_CONFIGURE.
152 ac_test_CXXFLAGS="${CXXFLAGS+set}"
153 ac_save_CXXFLAGS="$CXXFLAGS"
155 # Check for maintainer-mode bits.
156 if test x"$USE_MAINTAINER_MODE" = xno; then
162 # Check for -ffunction-sections -fdata-sections
163 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
164 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
165 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
166 if test "$ac_test_CXXFLAGS" = set; then
167 CXXFLAGS="$ac_save_CXXFLAGS"
169 # this is the suspicious part
172 if test x"$ac_fdsections" = x"yes"; then
173 SECTION_FLAGS='-ffunction-sections -fdata-sections'
175 AC_MSG_RESULT($ac_fdsections)
179 AC_SUBST(SECTION_FLAGS)
184 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
185 dnl the native linker is in use, all variables will be defined to something
186 dnl safe (like an empty string).
189 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
190 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
191 dnl LD (as a side effect of testing)
194 dnl glibcxx_gnu_ld_version (possibly)
196 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
197 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
199 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
200 # If we're not using GNU ld, then there's no point in even trying these
201 # tests. Check for that first. We should have already tested for gld
202 # by now (in libtool), but require it now just to be safe...
203 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
204 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
205 AC_REQUIRE([AC_PROG_LD])
206 AC_REQUIRE([AC_PROG_AWK])
208 # The name set by libtool depends on the version of libtool. Shame on us
209 # for depending on an impl detail, but c'est la vie. Older versions used
210 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
211 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
212 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
213 # set (hence we're using an older libtool), then set it.
214 if test x${with_gnu_ld+set} != xset; then
215 if test x${ac_cv_prog_gnu_ld+set} != xset; then
216 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
219 with_gnu_ld=$ac_cv_prog_gnu_ld
223 # Start by getting the version number. I think the libtool test already
224 # does some of this, but throws away the result.
225 AC_MSG_CHECKING([for ld version])
227 ldver=`$LD --version 2>/dev/null | head -1 | \
228 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
230 glibcxx_gnu_ld_version=`echo $ldver | \
231 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
232 AC_MSG_RESULT($glibcxx_gnu_ld_version)
235 glibcxx_gcsections_min_ld=21602
236 if test x"$with_gnu_ld" = x"yes" &&
237 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
239 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
240 # NB: This flag only works reliably after 2.16.1. Configure tests
241 # for this are difficult, so hard wire a value that should work.
243 # All these tests are for C++, but run with the "C" compiler driver.
244 # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
245 ac_test_CFLAGS="${CFLAGS+set}"
246 ac_save_CFLAGS="$CFLAGS"
247 CFLAGS='-x c++ -Wl,--gc-sections'
249 # Check for -Wl,--gc-sections
250 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
251 AC_TRY_LINK([ int one(void) { return 1; }
252 int two(void) { return 2; }
253 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
254 if test "$ac_gcsections" = "yes"; then
257 if $CC -c conftest.c; then
258 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
259 grep "Warning: gc-sections option ignored" > /dev/null; then
263 rm -f conftest.c conftest.o conftest
265 if test "$ac_gcsections" = "yes"; then
266 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
268 AC_MSG_RESULT($ac_gcsections)
270 if test "$ac_test_CFLAGS" = set; then
271 CFLAGS="$ac_save_CFLAGS"
273 # this is the suspicious part
279 # Note this is only for shared objects.
281 if test x"$with_gnu_ld" = x"yes"; then
282 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
283 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
284 if test -n "$cxx_z_relo"; then
285 OPT_LDFLAGS="-Wl,-z,relro"
288 AC_MSG_RESULT($ac_ld_relro)
291 # Set linker optimization flags.
292 if test x"$with_gnu_ld" = x"yes"; then
293 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
296 AC_SUBST(SECTION_LDFLAGS)
297 AC_SUBST(OPT_LDFLAGS)
302 dnl Check to see if this target can enable the iconv specializations.
303 dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
304 dnl (This must have been previously checked, along with the rest of C99
305 dnl support.) By default, iconv support is disabled.
308 dnl _GLIBCXX_USE_ICONV if all the bits are found.
310 dnl LIBICONV to a -l string containing the iconv library, if needed.
312 AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
315 # Only continue checking if the ISO C99 headers exist and support is on.
316 if test x"$enable_wchar_t" = xyes; then
318 # Use iconv for wchar_t to char conversions. As such, check for
319 # X/Open Portability Guide, version 2 features (XPG2).
320 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
321 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
323 # Check for existence of libiconv.a providing XPG2 wchar_t support.
324 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
326 LIBS="$LIBS $LIBICONV"
329 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
330 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
334 if test x"$ac_has_iconv_h" = xyes &&
335 test x"$ac_has_langinfo_h" = xyes &&
336 test x"$ac_XPG2funcs" = xyes;
338 AC_DEFINE([_GLIBCXX_USE_ICONV],1,
339 [Define if iconv and related functions exist and are usable.])
343 AC_MSG_CHECKING([for enabled iconv specializations])
344 AC_MSG_RESULT($enable_iconv)
349 dnl Check for headers for, and arguments to, the setrlimit() function.
350 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
353 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
354 dnl various HAVE_LIMIT_* for individual limit names
356 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
357 AC_MSG_CHECKING([for RLIMIT_$1])
360 #include <sys/time.h>
361 #include <sys/resource.h>
363 [ int f = RLIMIT_$1 ; ],
364 [glibcxx_mresult=1], [glibcxx_mresult=0])
365 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
366 [Only used in build directory testsuite_hooks.h.])
367 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
371 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
372 setrlimit_have_headers=yes
373 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
375 [setrlimit_have_headers=no])
376 # If don't have the headers, then we can't run the tests now, and we
377 # won't be seeing any of these during testsuite compilation.
378 if test $setrlimit_have_headers = yes; then
379 # Can't do these in a loop, else the resulting syntax is wrong.
380 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
381 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
382 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
383 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
384 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
386 # Check for rlimit, setrlimit.
387 AC_CACHE_VAL(ac_setrlimit, [
390 #include <sys/time.h>
391 #include <sys/resource.h>
395 [ac_setrlimit=yes], [ac_setrlimit=no])
399 AC_MSG_CHECKING([for testsuite resource limits support])
400 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
402 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
403 [Define if using setrlimit to set resource limits during
408 AC_MSG_RESULT($ac_res_limits)
413 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
414 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
416 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
417 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
418 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
420 [#include <sys/stat.h>],
423 S_ISREG(buffer.st_mode);],
424 [glibcxx_cv_S_ISREG=yes],
425 [glibcxx_cv_S_ISREG=no])
427 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
429 [#include <sys/stat.h>],
432 S_IFREG & buffer.st_mode;],
433 [glibcxx_cv_S_IFREG=yes],
434 [glibcxx_cv_S_IFREG=no])
437 if test $glibcxx_cv_S_ISREG = yes; then
438 AC_DEFINE(HAVE_S_ISREG, 1,
439 [Define if S_IFREG is available in <sys/stat.h>.])
441 elif test $glibcxx_cv_S_IFREG = yes; then
442 AC_DEFINE(HAVE_S_IFREG, 1,
443 [Define if S_IFREG is available in <sys/stat.h>.])
451 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
453 AC_DEFUN([GLIBCXX_CHECK_POLL], [
454 AC_MSG_CHECKING([for poll])
455 AC_CACHE_VAL(glibcxx_cv_POLL, [
458 [struct pollfd pfd[1];
459 pfd[0].events = POLLIN;
461 [glibcxx_cv_POLL=yes],
462 [glibcxx_cv_POLL=no])
464 if test $glibcxx_cv_POLL = yes; then
465 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
467 AC_MSG_RESULT($glibcxx_cv_POLL)
472 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
474 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
475 AC_MSG_CHECKING([for writev])
476 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
478 [#include <sys/uio.h>],
479 [struct iovec iov[2];
481 [glibcxx_cv_WRITEV=yes],
482 [glibcxx_cv_WRITEV=no])
484 if test $glibcxx_cv_WRITEV = yes; then
485 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
487 AC_MSG_RESULT($glibcxx_cv_WRITEV)
492 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
494 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
495 AC_MSG_CHECKING([for int64_t])
496 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
498 [#include <stdint.h>],
500 [glibcxx_cv_INT64_T=yes],
501 [glibcxx_cv_INT64_T=no])
503 if test $glibcxx_cv_INT64_T = yes; then
504 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
506 AC_MSG_RESULT($glibcxx_cv_INT64_T)
511 dnl Check whether LFS support is available.
513 AC_DEFUN([GLIBCXX_CHECK_LFS], [
516 ac_save_CXXFLAGS="$CXXFLAGS"
517 CXXFLAGS="$CXXFLAGS -fno-exceptions"
518 AC_MSG_CHECKING([for LFS support])
519 AC_CACHE_VAL(glibcxx_cv_LFS, [
523 #include <sys/stat.h>
527 fseeko64(fp, 0, SEEK_CUR);
529 lseek64(1, 0, SEEK_CUR);
532 [glibcxx_cv_LFS=yes],
535 if test $glibcxx_cv_LFS = yes; then
536 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
538 AC_MSG_RESULT($glibcxx_cv_LFS)
539 CXXFLAGS="$ac_save_CXXFLAGS"
545 dnl Check for whether a fully dynamic basic_string implementation should
546 dnl be turned on, that does not put empty objects in per-process static
547 dnl memory (mostly useful together with shared memory allocators, see PR
548 dnl libstdc++/16612 for details).
550 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
551 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
552 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
553 dnl Where DEFAULT is either `yes' or `no'.
555 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
556 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
557 if test $enable_fully_dynamic_string = yes; then
558 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
559 [Define if a fully dynamic basic_string is wanted.])
565 dnl Does any necessary configuration of the testsuite directory. Generates
566 dnl the testsuite_hooks.h header.
568 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
572 dnl GLIBCXX_TEST_WCHAR_T
573 dnl GLIBCXX_TEST_THREAD
577 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
578 if $GLIBCXX_IS_NATIVE ; then
579 # Do checks for resource limit functions.
580 GLIBCXX_CHECK_SETRLIMIT
582 # Look for setenv, so that extended locale tests can be performed.
583 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
586 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
587 test $enable_symvers != no; then
590 enable_abi_check=no ;;
592 enable_abi_check=yes ;;
595 # Only build this as native, since automake does not understand
600 # Export file names for ABI checking.
601 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
602 AC_SUBST(baseline_dir)
607 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
611 dnl TOPLEVEL_INCLUDES
613 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
614 # Used for every C++ compile we perform.
616 -I$glibcxx_builddir/include/$host_alias \
617 -I$glibcxx_builddir/include \
618 -I$glibcxx_srcdir/libsupc++"
620 # For Canadian crosses, pick this up too.
621 if test $CANADIAN = yes; then
622 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
625 # Stuff in the actual top level. Currently only used by libsupc++ to
626 # get unwind* headers from the gcc dir.
627 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
628 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
630 # Now, export this to all the little Makefiles....
631 AC_SUBST(GLIBCXX_INCLUDES)
632 AC_SUBST(TOPLEVEL_INCLUDES)
637 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
638 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
641 dnl OPTIMIZE_CXXFLAGS
644 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
645 # Optimization flags that are probably a good idea for thrill-seekers. Just
646 # uncomment the lines below and make, everything else is ready to go...
647 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
649 AC_SUBST(OPTIMIZE_CXXFLAGS)
651 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
657 dnl All installation directory information is determined here.
661 dnl glibcxx_prefixdir
662 dnl glibcxx_toolexecdir
663 dnl glibcxx_toolexeclibdir
665 dnl Assumes cross_compiling bits already done, and with_cross_host in
668 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
669 glibcxx_toolexecdir=no
670 glibcxx_toolexeclibdir=no
671 glibcxx_prefixdir=$prefix
673 AC_MSG_CHECKING([for gxx-include-dir])
674 AC_ARG_WITH([gxx-include-dir],
675 AC_HELP_STRING([--with-gxx-include-dir=DIR],
676 [installation directory for include files]),
678 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
679 no) gxx_include_dir=no ;;
680 *) gxx_include_dir=$withval ;;
682 [gxx_include_dir=no])
683 AC_MSG_RESULT($gxx_include_dir)
685 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
686 AC_ARG_ENABLE([version-specific-runtime-libs],
687 AC_HELP_STRING([--enable-version-specific-runtime-libs],
688 [Specify that runtime libraries should be installed in a compiler-specific directory]),
689 [case "$enableval" in
690 yes) version_specific_libs=yes ;;
691 no) version_specific_libs=no ;;
692 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
694 [version_specific_libs=no])
695 AC_MSG_RESULT($version_specific_libs)
697 # Default case for install directory for include files.
698 if test $version_specific_libs = no && test $gxx_include_dir = no; then
699 gxx_include_dir='${prefix}/include/c++/${gcc_version}'
702 # Version-specific runtime libs processing.
703 if test $version_specific_libs = yes; then
704 # Need the gcc compiler version to know where to install libraries
705 # and header files if --enable-version-specific-runtime-libs option
706 # is selected. FIXME: these variables are misnamed, there are
707 # no executables installed in _toolexecdir or _toolexeclibdir.
708 if test x"$gxx_include_dir" = x"no"; then
709 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
711 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
712 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
715 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
716 # Install a library built with a cross compiler in tooldir, not libdir.
717 if test x"$glibcxx_toolexecdir" = x"no"; then
718 if test -n "$with_cross_host" &&
719 test x"$with_cross_host" != x"no"; then
720 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
721 glibcxx_toolexeclibdir='${toolexecdir}/lib'
723 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
724 glibcxx_toolexeclibdir='${libdir}'
726 multi_os_directory=`$CXX -print-multi-os-directory`
727 case $multi_os_directory in
728 .) ;; # Avoid trailing /.
729 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
733 AC_MSG_CHECKING([for install location])
734 AC_MSG_RESULT($gxx_include_dir)
736 AC_SUBST(glibcxx_prefixdir)
737 AC_SUBST(gxx_include_dir)
738 AC_SUBST(glibcxx_toolexecdir)
739 AC_SUBST(glibcxx_toolexeclibdir)
745 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
746 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
747 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
749 dnl See docs/html/17_intro/configury.html#enable for documentation.
751 m4_define([GLIBCXX_ENABLE],[dnl
752 m4_define([_g_switch],[--enable-$1])dnl
753 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
754 AC_ARG_ENABLE($1,_g_help,
759 m4_bpatsubst([$5],[permit ])) ;;
760 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
761 dnl Idea for future: generate a URL pointing to
762 dnl "onlinedocs/configopts.html#whatever"
769 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
773 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
774 m4_undefine([_g_switch])dnl
775 m4_undefine([_g_help])dnl
780 dnl Check for ISO/IEC 9899:1999 "C99" support.
782 dnl --enable-c99 defines _GLIBCXX_USE_C99
783 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
784 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
785 dnl Where DEFAULT is either `yes' or `no'.
786 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
788 AC_DEFUN([GLIBCXX_ENABLE_C99], [
789 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
791 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos
792 # even if C99 support is turned off.
793 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
794 AC_MSG_CHECKING([for mbstate_t])
795 AC_TRY_COMPILE([#include <wchar.h>],
796 [mbstate_t teststate;],
797 have_mbstate_t=yes, have_mbstate_t=no)
798 AC_MSG_RESULT($have_mbstate_t)
799 if test x"$have_mbstate_t" = xyes; then
800 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
803 if test x"$enable_c99" = x"yes"; then
808 # Check for the existence of <math.h> functions used if C99 is enabled.
809 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
810 AC_CACHE_VAL(ac_c99_math, [
811 AC_TRY_COMPILE([#include <math.h>],
819 isgreaterequal(0.0,0.0);
821 islessequal(0.0,0.0);
822 islessgreater(0.0,0.0);
823 islessgreater(0.0,0.0);
824 isunordered(0.0,0.0);
825 ],[ac_c99_math=yes], [ac_c99_math=no])
827 AC_MSG_RESULT($ac_c99_math)
828 if test x"$ac_c99_math" = x"yes"; then
829 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
830 [Define if C99 functions or macros in <math.h> should be imported
831 in <cmath> in namespace std.])
834 # Check for the existence of <complex.h> complex math functions.
835 # This is necessary even though libstdc++ uses the builtin versions
836 # of these functions, because if the builtin cannot be used, a reference
837 # to the library function is emitted.
838 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
840 if test x"$ac_has_complex_h" = x"yes"; then
841 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
842 AC_TRY_COMPILE([#include <complex.h>],
843 [typedef __complex__ float float_type; float_type tmpf;
856 typedef __complex__ double double_type; double_type tmpd;
869 typedef __complex__ long double ld_type; ld_type tmpld;
882 ],[ac_c99_complex=yes], [ac_c99_complex=no])
884 AC_MSG_RESULT($ac_c99_complex)
885 if test x"$ac_c99_complex" = x"yes"; then
886 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
887 [Define if C99 functions in <complex.h> should be used in
888 <complex>. Using compiler builtins for these functions requires
889 corresponding C99 library functions to be present.])
892 # Check for the existence in <stdio.h> of vscanf, et. al.
893 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
894 AC_CACHE_VAL(ac_c99_stdio, [
895 AC_TRY_COMPILE([#include <stdio.h>
897 void foo(char* fmt, ...)
899 va_list args; va_start(args, fmt);
900 vfscanf(stderr, "%i", args);
902 vsnprintf(fmt, 0, "%i", args);
903 vsscanf(fmt, "%i", args);
905 [snprintf("12", 0, "%i");],
906 [ac_c99_stdio=yes], [ac_c99_stdio=no])
908 AC_MSG_RESULT($ac_c99_stdio)
910 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
911 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
912 AC_CACHE_VAL(ac_c99_stdlib, [
913 AC_TRY_COMPILE([#include <stdlib.h>],
916 strtold("gnu", &tmp);
917 strtoll("gnu", &tmp, 10);
918 strtoull("gnu", &tmp, 10);
923 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
925 AC_MSG_RESULT($ac_c99_stdlib)
927 # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
928 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
930 if test x"$ac_has_wchar_h" = xyes &&
931 test x"$ac_has_wctype_h" = xyes; then
932 AC_TRY_COMPILE([#include <wchar.h>
996 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
998 # Checks for wide character functions that may not be present.
999 # Injection of these is wrapped with guard macros.
1000 # NB: only put functions here, instead of immediately above, if
1001 # absolutely necessary.
1002 AC_TRY_COMPILE([#include <wchar.h>
1003 namespace test { using ::vfwscanf; } ], [],
1004 [AC_DEFINE(HAVE_VFWSCANF,1,
1005 [Defined if vfwscanf exists.])],[])
1007 AC_TRY_COMPILE([#include <wchar.h>
1008 namespace test { using ::vswscanf; } ], [],
1009 [AC_DEFINE(HAVE_VSWSCANF,1,
1010 [Defined if vswscanf exists.])],[])
1012 AC_TRY_COMPILE([#include <wchar.h>
1013 namespace test { using ::vwscanf; } ], [],
1014 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1016 AC_TRY_COMPILE([#include <wchar.h>
1017 namespace test { using ::wcstof; } ], [],
1018 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1020 AC_TRY_COMPILE([#include <wctype.h>],
1021 [ wint_t t; int i = iswblank(t);],
1022 [AC_DEFINE(HAVE_ISWBLANK,1,
1023 [Defined if iswblank exists.])],[])
1025 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1026 AC_MSG_RESULT($ac_c99_wchar)
1029 # Option parsed, now set things appropriately.
1030 if test x"$ac_c99_math" = x"no" ||
1031 test x"$ac_c99_complex" = x"no" ||
1032 test x"$ac_c99_stdio" = x"no" ||
1033 test x"$ac_c99_stdlib" = x"no" ||
1034 test x"$ac_c99_wchar" = x"no"; then
1037 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1038 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1039 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1045 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1046 AC_MSG_RESULT($enable_c99)
1051 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1052 dnl facilities in Chapter 8, "C compatibility".
1054 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1059 # Check for the existence of <complex.h> complex math functions used
1061 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1062 ac_c99_complex_tr1=no;
1063 if test x"$ac_has_complex_h" = x"yes"; then
1064 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1065 AC_TRY_COMPILE([#include <complex.h>],
1066 [typedef __complex__ float float_type; float_type tmpf;
1073 typedef __complex__ double double_type; double_type tmpd;
1080 typedef __complex__ long double ld_type; ld_type tmpld;
1087 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1089 AC_MSG_RESULT($ac_c99_complex_tr1)
1090 if test x"$ac_c99_complex_tr1" = x"yes"; then
1091 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1092 [Define if C99 functions in <complex.h> should be used in
1093 <tr1/complex>. Using compiler builtins for these functions
1094 requires corresponding C99 library functions to be present.])
1097 # Check for the existence of <ctype.h> functions.
1098 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1099 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1100 AC_TRY_COMPILE([#include <ctype.h>],
1104 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1106 AC_MSG_RESULT($ac_c99_ctype_tr1)
1107 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1108 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1109 [Define if C99 functions in <ctype.h> should be imported in
1110 <tr1/cctype> in namespace std::tr1.])
1113 # Check for the existence of <fenv.h> functions.
1114 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1116 if test x"$ac_has_fenv_h" = x"yes"; then
1117 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1118 AC_TRY_COMPILE([#include <fenv.h>],
1123 ret = feclearexcept(except);
1124 ret = fegetexceptflag(pflag, except);
1125 ret = feraiseexcept(except);
1126 ret = fesetexceptflag(pflag, except);
1127 ret = fetestexcept(except);
1129 ret = fesetround(mode);
1130 ret = fegetenv(penv);
1131 ret = feholdexcept(penv);
1132 ret = fesetenv(penv);
1133 ret = feupdateenv(penv);
1134 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1136 AC_MSG_RESULT($ac_c99_fenv_tr1)
1137 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1138 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1139 [Define if C99 functions in <fenv.h> should be imported in
1140 <tr1/cfenv> in namespace std::tr1.])
1148 dnl Check for what type of C headers to use.
1150 dnl --enable-cheaders= [does stuff].
1151 dnl --disable-cheaders [does not do anything, really].
1152 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1153 dnl Where DEFAULT is either `c' or `c_std'.
1155 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1156 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1157 [construct "C" headers for g++], [permit c|c_std])
1158 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1160 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1162 AC_SUBST(C_INCLUDE_DIR)
1163 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1164 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1165 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1170 dnl Check for which locale library to use. The choice is mapped to
1171 dnl a subdirectory of config/locale.
1173 dnl Default is generic.
1175 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1176 AC_MSG_CHECKING([for C locale to use])
1177 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1178 [use MODEL for target locale package],
1179 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1181 # If they didn't use this option switch, or if they specified --enable
1182 # with no specific model, we'll have to look for one. If they
1183 # specified --disable (???), do likewise.
1184 if test $enable_clocale = no || test $enable_clocale = yes; then
1188 # Either a known package, or "auto"
1189 enable_clocale_flag=$enable_clocale
1191 # Probe for locale support if no specific model is specified.
1192 # Default to "generic".
1193 if test $enable_clocale_flag = auto; then
1194 case ${target_os} in
1195 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1196 AC_EGREP_CPP([_GLIBCXX_ok], [
1197 #include <features.h>
1198 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1201 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1203 # Test for bugs early in glibc-2.2.x series
1204 if test $enable_clocale_flag = gnu; then
1206 #define _GNU_SOURCE 1
1209 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1210 extern __typeof(newlocale) __newlocale;
1211 extern __typeof(duplocale) __duplocale;
1212 extern __typeof(strcoll_l) __strcoll_l;
1216 const char __one[] = "Äuglein Augmen";
1217 const char __two[] = "Äuglein";
1222 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1223 loc_dup = __duplocale(loc);
1224 i = __strcoll_l(__one, __two, loc);
1225 j = __strcoll_l(__one, __two, loc_dup);
1229 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1230 [enable_clocale_flag=generic])
1233 # ... at some point put __strxfrm_l tests in as well.
1236 enable_clocale_flag=darwin
1239 enable_clocale_flag=generic
1244 # Deal with gettext issues. Default to not using it (=no) until we detect
1245 # support for it later. Let the user turn it off via --e/d, but let that
1246 # default to on for easier handling.
1249 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1253 # Set configure bits for specified locale package
1254 case ${enable_clocale_flag} in
1256 AC_MSG_RESULT(generic)
1258 CLOCALE_H=config/locale/generic/c_locale.h
1259 CLOCALE_CC=config/locale/generic/c_locale.cc
1260 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1261 CCOLLATE_CC=config/locale/generic/collate_members.cc
1262 CCTYPE_CC=config/locale/generic/ctype_members.cc
1263 CMESSAGES_H=config/locale/generic/messages_members.h
1264 CMESSAGES_CC=config/locale/generic/messages_members.cc
1265 CMONEY_CC=config/locale/generic/monetary_members.cc
1266 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1267 CTIME_H=config/locale/generic/time_members.h
1268 CTIME_CC=config/locale/generic/time_members.cc
1269 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1272 AC_MSG_RESULT(darwin or freebsd)
1274 CLOCALE_H=config/locale/generic/c_locale.h
1275 CLOCALE_CC=config/locale/generic/c_locale.cc
1276 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1277 CCOLLATE_CC=config/locale/generic/collate_members.cc
1278 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1279 CMESSAGES_H=config/locale/generic/messages_members.h
1280 CMESSAGES_CC=config/locale/generic/messages_members.cc
1281 CMONEY_CC=config/locale/generic/monetary_members.cc
1282 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1283 CTIME_H=config/locale/generic/time_members.h
1284 CTIME_CC=config/locale/generic/time_members.cc
1285 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1291 # Declare intention to use gettext, and add support for specific
1293 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1296 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1297 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1298 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1301 # Export the build objects.
1302 for ling in $ALL_LINGUAS; do \
1303 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1304 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1306 AC_SUBST(glibcxx_MOFILES)
1307 AC_SUBST(glibcxx_POFILES)
1309 CLOCALE_H=config/locale/gnu/c_locale.h
1310 CLOCALE_CC=config/locale/gnu/c_locale.cc
1311 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1312 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1313 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1314 CMESSAGES_H=config/locale/gnu/messages_members.h
1315 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1316 CMONEY_CC=config/locale/gnu/monetary_members.cc
1317 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1318 CTIME_H=config/locale/gnu/time_members.h
1319 CTIME_CC=config/locale/gnu/time_members.cc
1320 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1323 AC_MSG_RESULT(IEEE 1003.1)
1325 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1326 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1327 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1328 CCOLLATE_CC=config/locale/generic/collate_members.cc
1329 CCTYPE_CC=config/locale/generic/ctype_members.cc
1330 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1331 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1332 CMONEY_CC=config/locale/generic/monetary_members.cc
1333 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1334 CTIME_H=config/locale/generic/time_members.h
1335 CTIME_CC=config/locale/generic/time_members.cc
1336 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1340 # This is where the testsuite looks for locale catalogs, using the
1341 # -DLOCALEDIR define during testsuite compilation.
1342 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1343 AC_SUBST(glibcxx_localedir)
1345 # A standalone libintl (e.g., GNU libintl) may be in use.
1346 if test $USE_NLS = yes; then
1347 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1348 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1350 if test $USE_NLS = yes; then
1351 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1352 [Define if NLS translations are to be used.])
1357 AC_SUBST(CMESSAGES_H)
1358 AC_SUBST(CCODECVT_CC)
1359 AC_SUBST(CCOLLATE_CC)
1361 AC_SUBST(CMESSAGES_CC)
1363 AC_SUBST(CNUMERIC_CC)
1366 AC_SUBST(CLOCALE_CC)
1367 AC_SUBST(CLOCALE_INTERNAL_H)
1372 dnl Check for which std::allocator base class to use. The choice is
1373 dnl mapped from a subdirectory of include/ext.
1377 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1378 AC_MSG_CHECKING([for std::allocator base class])
1379 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1380 [use KIND for target std::allocator base],
1381 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1383 # If they didn't use this option switch, or if they specified --enable
1384 # with no specific model, we'll have to look for one. If they
1385 # specified --disable (???), do likewise.
1386 if test $enable_libstdcxx_allocator = no ||
1387 test $enable_libstdcxx_allocator = yes;
1389 enable_libstdcxx_allocator=auto
1392 # Either a known package, or "auto". Auto implies the default choice
1393 # for a particular platform.
1394 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1396 # Probe for host-specific support if no specific model is specified.
1398 if test $enable_libstdcxx_allocator_flag = auto; then
1399 case ${target_os} in
1400 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1401 enable_libstdcxx_allocator_flag=new
1404 enable_libstdcxx_allocator_flag=new
1408 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1411 # Set configure bits for specified locale package
1412 case ${enable_libstdcxx_allocator_flag} in
1414 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1415 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1418 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1419 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1422 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1423 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1426 ALLOCATOR_H=config/allocator/new_allocator_base.h
1427 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1430 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1431 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1435 AC_SUBST(ALLOCATOR_H)
1436 AC_SUBST(ALLOCATOR_NAME)
1441 dnl Check for whether the Boost-derived checks should be turned on.
1443 dnl --enable-concept-checks turns them on.
1444 dnl --disable-concept-checks leaves them off.
1445 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1446 dnl Where DEFAULT is either `yes' or `no'.
1448 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1449 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1450 if test $enable_concept_checks = yes; then
1451 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1452 [Define to use concept checking code from the boost libraries.])
1458 dnl Check for which I/O library to use: stdio, or something specific.
1460 dnl Default is stdio.
1462 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1463 AC_MSG_CHECKING([for underlying I/O to use])
1464 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1465 [use target-specific I/O package], [permit stdio])
1467 # Now that libio has been removed, you can have any color you want as long
1468 # as it's black. This is one big no-op until other packages are added, but
1469 # showing the framework never hurts.
1470 case ${enable_cstdio} in
1472 CSTDIO_H=config/io/c_io_stdio.h
1473 BASIC_FILE_H=config/io/basic_file_stdio.h
1474 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1475 AC_MSG_RESULT(stdio)
1480 AC_SUBST(BASIC_FILE_H)
1481 AC_SUBST(BASIC_FILE_CC)
1486 dnl Check for "unusual" flags to pass to the compiler while building.
1488 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1489 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1490 dnl --disable-cxx-flags passes nothing.
1491 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1492 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1493 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1494 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1495 dnl If "default flags" is an empty string, the effect is the same
1496 dnl as --disable or --enable=no.
1498 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1499 AC_MSG_CHECKING([for extra compiler flags for building])
1500 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1501 [pass compiler FLAGS when building library],
1502 [case "x$enable_cxx_flags" in
1503 xno | x) enable_cxx_flags= ;;
1505 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1508 # Run through flags (either default or command-line) and set anything
1509 # extra (e.g., #defines) that must accompany particular g++ options.
1510 if test -n "$enable_cxx_flags"; then
1511 for f in $enable_cxx_flags; do
1515 *) # and we're trying to pass /what/ exactly?
1516 AC_MSG_ERROR([compiler flags start with a -]) ;;
1521 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1522 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1523 AC_SUBST(EXTRA_CXX_FLAGS)
1528 dnl Check to see if debugging libraries are to be built.
1530 dnl --enable-libstdcxx-debug
1531 dnl builds a separate set of debugging libraries in addition to the
1532 dnl normal (shared, static) libstdc++ binaries.
1534 dnl --disable-libstdcxx-debug
1535 dnl builds only one (non-debug) version of libstdc++.
1537 dnl --enable-libstdcxx-debug-flags=FLAGS
1538 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1540 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1541 dnl Where DEFAULT is either `yes' or `no'.
1543 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1544 AC_MSG_CHECKING([for additional debug build])
1545 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1546 AC_MSG_RESULT($enable_libstdcxx_debug)
1547 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1552 dnl Check for explicit debug flags.
1554 dnl --enable-libstdcxx-debug-flags='-O1'
1555 dnl is a general method for passing flags to be used when
1556 dnl building debug libraries with --enable-debug.
1558 dnl --disable-libstdcxx-debug-flags does nothing.
1559 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1560 dnl If "default flags" is an empty string, the effect is the same
1561 dnl as --disable or --enable=no.
1563 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1564 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1565 [pass compiler FLAGS when building debug library],
1566 [case "x$enable_libstdcxx_debug_flags" in
1567 xno | x) enable_libstdcxx_debug_flags= ;;
1569 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1572 # Option parsed, now set things appropriately
1573 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1574 AC_SUBST(DEBUG_FLAGS)
1576 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1581 dnl Check if the user only wants a freestanding library implementation.
1583 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1584 dnl installing only the headers required by [17.4.1.3] and the language
1585 dnl support library. More than that will be built (to keep the Makefiles
1586 dnl conveniently clean), but not installed.
1589 dnl is_hosted (yes/no)
1592 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1594 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1595 AC_ARG_ENABLE([hosted-libstdcxx],
1596 AC_HELP_STRING([--disable-hosted-libstdcxx],
1597 [only build freestanding C++ runtime support]),,
1600 enable_hosted_libstdcxx=no
1603 enable_hosted_libstdcxx=yes
1606 if test "$enable_hosted_libstdcxx" = no; then
1607 AC_MSG_NOTICE([Only freestanding libraries will be built])
1611 enable_libstdcxx_pch=no
1616 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1617 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1618 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1623 dnl Check for template specializations for the 'long long' type.
1624 dnl The result determines only whether 'long long' I/O is enabled; things
1625 dnl like numeric_limits<> specializations are always available.
1627 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1628 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1629 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1630 dnl Where DEFAULT is either `yes' or `no'.
1632 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1633 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1634 if test $enable_long_long = yes; then
1635 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1636 [Define if code specialized for long long should be used.])
1638 AC_MSG_CHECKING([for enabled long long specializations])
1639 AC_MSG_RESULT([$enable_long_long])
1644 dnl Check for template specializations for the 'wchar_t' type.
1646 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1647 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1648 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1649 dnl Where DEFAULT is either `yes' or `no'.
1651 dnl Necessary support (probed along with C99 support) must also be present.
1653 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1654 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1655 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1656 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1657 [Define if code specialized for wchar_t should be used.])
1659 AC_MSG_CHECKING([for enabled wchar_t specializations])
1660 AC_MSG_RESULT([$enable_wchar_t])
1665 dnl Check to see if building and using a C++ precompiled header can be done.
1667 dnl --enable-libstdcxx-pch=yes
1668 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1669 dnl may work, after some light-hearted attempts to puzzle out compiler
1670 dnl support, flip bits on in include/Makefile.am
1672 dnl --disable-libstdcxx-pch
1673 dnl turns off attempts to use or build stdc++.h.gch.
1676 dnl glibcxx_PCHFLAGS
1678 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1679 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1680 if test $enable_libstdcxx_pch = yes; then
1681 AC_CACHE_CHECK([for compiler with PCH support],
1682 [glibcxx_cv_prog_CXX_pch],
1683 [ac_save_CXXFLAGS="$CXXFLAGS"
1684 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1687 echo '#include <math.h>' > conftest.h
1688 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1689 -o conftest.h.gch 1>&5 2>&1 &&
1690 echo '#error "pch failed"' > conftest.h &&
1691 echo '#include "conftest.h"' > conftest.cc &&
1692 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1694 glibcxx_cv_prog_CXX_pch=yes
1696 glibcxx_cv_prog_CXX_pch=no
1699 CXXFLAGS=$ac_save_CXXFLAGS
1702 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1705 AC_MSG_CHECKING([for enabled PCH])
1706 AC_MSG_RESULT([$enable_libstdcxx_pch])
1708 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1709 if test $enable_libstdcxx_pch = yes; then
1710 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1714 AC_SUBST(glibcxx_PCHFLAGS)
1719 dnl Check for exception handling support. If an explicit enable/disable
1720 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1721 dnl target may or may not support call frame exceptions.
1723 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1724 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1725 dnl Neither one forces an attempt at detection.
1728 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1730 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1731 AC_MSG_CHECKING([for exception model to use])
1734 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1735 [force use of builtin_setjmp for exceptions],
1736 [permit yes|no|auto])
1738 if test $enable_sjlj_exceptions = auto; then
1739 # Botheration. Now we've got to detect the exception model. Link tests
1740 # against libgcc.a are problematic since we've not been given proper -L
1741 # bits for single-tree newlib and libgloss.
1743 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1744 cat > conftest.$ac_ext << EOF
1745 [#]line __oline__ "configure"
1754 old_CXXFLAGS="$CXXFLAGS"
1756 if AC_TRY_EVAL(ac_compile); then
1757 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1758 enable_sjlj_exceptions=yes
1759 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1760 enable_sjlj_exceptions=no
1761 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
1762 enable_sjlj_exceptions=no
1765 CXXFLAGS="$old_CXXFLAGS"
1769 # This is a tad weird, for hysterical raisins. We have to map
1770 # enable/disable to two different models.
1771 case $enable_sjlj_exceptions in
1773 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1774 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1775 ac_exception_model_name=sjlj
1778 ac_exception_model_name="call frame"
1781 AC_MSG_ERROR([unable to detect exception model])
1785 AC_MSG_RESULT($ac_exception_model_name)
1790 dnl Add version tags to symbols in shared library (or not), additionally
1791 dnl marking other symbols as private/local (or not).
1793 dnl --enable-symvers=style adds a version script to the linker call when
1794 dnl creating the shared library. The choice of version script is
1795 dnl controlled by 'style'.
1796 dnl --disable-symvers does not.
1797 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1798 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1799 dnl choose a default style based on linker characteristics. Passing
1800 dnl 'no' disables versioning.
1802 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1804 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1805 [enables symbol versioning of the shared library],
1806 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
1808 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1809 # don't know enough about $LD to do tricks...
1810 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1812 # Turn a 'yes' into a suitable default.
1813 if test x$enable_symvers = xyes ; then
1814 if test $enable_shared = no || test "x$LD" = x ; then
1817 if test $with_gnu_ld = yes ; then
1820 case ${target_os} in
1822 enable_symvers=darwin ;;
1824 enable_symvers=no ;;
1830 # Check to see if 'darwin' or 'darwin-export' can win.
1831 if test x$enable_symvers = xdarwin-export ; then
1832 enable_symvers=darwin
1835 # Check to see if 'gnu' can win.
1836 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
1837 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1838 AC_MSG_CHECKING([for shared libgcc])
1839 ac_save_CFLAGS="$CFLAGS"
1841 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1842 CFLAGS="$ac_save_CFLAGS"
1843 if test $glibcxx_shared_libgcc = no; then
1844 cat > conftest.c <<EOF
1845 int main (void) { return 0; }
1848 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1849 -shared -shared-libgcc -o conftest.so \
1850 conftest.c -v 2>&1 >/dev/null \
1851 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1853 rm -f conftest.c conftest.so
1854 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1855 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1856 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1857 CFLAGS="$ac_save_CFLAGS"
1860 AC_MSG_RESULT($glibcxx_shared_libgcc)
1862 # For GNU ld, we need at least this version. The format is described in
1863 # GLIBCXX_CHECK_LINKER_FEATURES above.
1864 glibcxx_min_gnu_ld_version=21400
1866 # If no shared libgcc, can't win.
1867 if test $glibcxx_shared_libgcc != yes; then
1868 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
1869 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
1870 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1872 elif test $with_gnu_ld != yes ; then
1874 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
1875 AC_MSG_WARN([=== you are not using the GNU linker.])
1876 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1878 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
1879 # The right tools, the right setup, but too old. Fallbacks?
1880 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1881 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1882 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1883 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1884 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1889 # Everything parsed; figure out what file to use.
1890 case $enable_symvers in
1892 SYMVER_FILE=config/abi/pre/none.ver
1895 SYMVER_FILE=config/abi/pre/gnu.ver
1896 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
1897 [Define to use GNU versioning in the shared library.])
1899 gnu-versioned-namespace)
1900 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
1901 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
1902 [Define to use GNU namespace versioning in the shared library.])
1905 SYMVER_FILE=config/abi/pre/gnu.ver
1906 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
1907 [Define to use darwin versioning in the shared library.])
1911 if test x$enable_symvers != xno ; then
1912 AC_DEFINE(_GLIBCXX_SYMVER, 1,
1913 [Define to use symbol versioning in the shared library.])
1916 AC_SUBST(SYMVER_FILE)
1917 AC_SUBST(port_specific_symbol_files)
1918 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
1919 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
1920 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
1921 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
1922 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1924 # Now, set up compatibility support, if any.
1925 # In addition, need this to deal with std::size_t mangling in
1926 # src/compatibility.cc. In a perfect world, could use
1927 # typeid(std::size_t).name()[0] to do direct substitution.
1928 AC_MSG_CHECKING([for size_t as unsigned int])
1929 ac_save_CFLAGS="$CFLAGS"
1931 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
1932 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
1933 CFLAGS=$ac_save_CFLAGS
1934 if test "$glibcxx_size_t_is_i" = yes; then
1935 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
1937 AC_MSG_RESULT([$glibcxx_size_t_is_i])
1939 AC_MSG_CHECKING([for ptrdiff_t as int])
1940 ac_save_CFLAGS="$CFLAGS"
1942 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
1943 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
1944 CFLAGS=$ac_save_CFLAGS
1945 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
1946 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
1948 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
1953 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1954 dnl We must stage the required headers so that they will be installed
1955 dnl with the library (unlike libgcc, the STL implementation is provided
1956 dnl solely within headers). Since we must not inject random user-space
1957 dnl macro names into user-provided C++ code, we first stage into <file>-in
1958 dnl and process to <file> with an output command. The reason for a two-
1959 dnl stage process here is to correctly handle $srcdir!=$objdir without
1960 dnl having to write complex code (the sed commands to clean the macro
1961 dnl namespace are complex and fragile enough as it is). We must also
1962 dnl add a relative path so that -I- is supported properly.
1965 dnl glibcxx_thread_h
1968 dnl HAVE_GTHR_DEFAULT
1970 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1971 AC_MSG_CHECKING([for thread model used by GCC])
1972 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1973 AC_MSG_RESULT([$target_thread_file])
1975 if test $target_thread_file != single; then
1976 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
1977 [Define if gthr-default.h exists
1978 (meaning that threading support is enabled).])
1981 glibcxx_thread_h=gthr-$target_thread_file.h
1983 dnl Check for __GTHREADS define.
1984 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1985 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1991 AC_SUBST(glibcxx_thread_h)
1995 # Check whether LC_MESSAGES is available in <locale.h>.
1996 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1998 # This file file be copied and used freely without restrictions. It can
1999 # be used in projects which are not available under the GNU Public License
2000 # but which still want to provide support for the GNU gettext functionality.
2001 # Please note that the actual code is *not* freely available.
2004 AC_DEFUN([AC_LC_MESSAGES], [
2005 AC_CHECK_HEADER(locale.h, [
2006 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2007 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2008 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2009 if test $ac_cv_val_LC_MESSAGES = yes; then
2010 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2011 [Define if LC_MESSAGES is available in <locale.h>.])
2016 # Macros from the top-level gcc directory.
2017 m4_include([../config/tls.m4])