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.])
1143 # Check for the existence of <stdint.h> types.
1144 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1145 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1146 AC_TRY_COMPILE([#include <stdint.h>],
1147 [typedef int8_t my_int8_t;
1148 typedef int16_t my_int16_t;
1149 typedef int32_t my_int32_t;
1150 typedef int64_t my_int64_t;
1151 typedef int_fast8_t my_int_fast8_t;
1152 typedef int_fast16_t my_int_fast16_t;
1153 typedef int_fast32_t my_int_fast32_t;
1154 typedef int_fast64_t my_int_fast64_t;
1155 typedef int_least8_t my_int_least8_t;
1156 typedef int_least16_t my_int_least16_t;
1157 typedef int_least32_t my_int_least32_t;
1158 typedef int_least64_t my_int_least64_t;
1159 typedef intmax_t my_intmax_t;
1160 typedef intptr_t my_intptr_t;
1161 typedef uint8_t my_uint8_t;
1162 typedef uint16_t my_uint16_t;
1163 typedef uint32_t my_uint32_t;
1164 typedef uint64_t my_uint64_t;
1165 typedef uint_fast8_t my_uint_fast8_t;
1166 typedef uint_fast16_t my_uint_fast16_t;
1167 typedef uint_fast32_t my_uint_fast32_t;
1168 typedef uint_fast64_t my_uint_fast64_t;
1169 typedef uint_least8_t my_uint_least8_t;
1170 typedef uint_least16_t my_uint_least16_t;
1171 typedef uint_least32_t my_uint_least32_t;
1172 typedef uint_least64_t my_uint_least64_t;
1173 typedef uintmax_t my_uintmax_t;
1174 typedef uintptr_t my_uintptr_t;
1175 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1177 AC_MSG_RESULT($ac_c99_stdint_tr1)
1178 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1179 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1180 [Define if C99 types in <stdint.h> should be imported in
1181 <tr1/cstdint> in namespace std::tr1.])
1184 # Check for the existence of <math.h> functions.
1185 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1186 AC_CACHE_VAL(ac_c99_math_tr1, [
1187 AC_TRY_COMPILE([#include <math.h>],
1201 copysignf(0.0f, 0.0f);
1202 copysignl(0.0l, 0.0l);
1219 fmaf(0.0f, 0.0f, 0.0f);
1220 fmal(0.0l, 0.0l, 0.0l);
1263 nextafter(0.0, 0.0);
1264 nextafterf(0.0f, 0.0f);
1265 nextafterl(0.0l, 0.0l);
1266 nexttoward(0.0, 0.0);
1267 nexttowardf(0.0f, 0.0f);
1268 nexttowardl(0.0l, 0.0l);
1269 remainder(0.0, 0.0);
1270 remainderf(0.0f, 0.0f);
1271 remainderl(0.0l, 0.0l);
1272 remquo(0.0, 0.0, 0);
1273 remquo(0.0f, 0.0f, 0);
1274 remquo(0.0l, 0.0l, 0);
1293 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1295 AC_MSG_RESULT($ac_c99_math_tr1)
1296 if test x"$ac_c99_math_tr1" = x"yes"; then
1297 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1298 [Define if C99 functions or macros in <math.h> should be imported
1299 in <tr1/cmath> in namespace std::tr1.])
1302 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1303 # sense if the previous check fails, per C99, 7.8/1).
1304 ac_c99_inttypes_tr1=no;
1305 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1306 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1307 AC_TRY_COMPILE([#include <inttypes.h>],
1308 [intmax_t i, numer, denom, base;
1311 intmax_t ret = imaxabs(i);
1312 imaxdiv_t dret = imaxdiv(numer, denom);
1313 ret = strtoimax(s, endptr, base);
1314 uintmax_t uret = strtoumax(s, endptr, base);
1315 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1317 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1318 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1319 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1320 [Define if C99 functions in <inttypes.h> should be imported in
1321 <tr1/cinttypes> in namespace std::tr1.])
1329 dnl Check for what type of C headers to use.
1331 dnl --enable-cheaders= [does stuff].
1332 dnl --disable-cheaders [does not do anything, really].
1333 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1334 dnl Where DEFAULT is either `c' or `c_std'.
1336 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1337 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1338 [construct "C" headers for g++], [permit c|c_std])
1339 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1341 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1343 AC_SUBST(C_INCLUDE_DIR)
1344 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1345 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1346 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1351 dnl Check for which locale library to use. The choice is mapped to
1352 dnl a subdirectory of config/locale.
1354 dnl Default is generic.
1356 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1357 AC_MSG_CHECKING([for C locale to use])
1358 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1359 [use MODEL for target locale package],
1360 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1362 # If they didn't use this option switch, or if they specified --enable
1363 # with no specific model, we'll have to look for one. If they
1364 # specified --disable (???), do likewise.
1365 if test $enable_clocale = no || test $enable_clocale = yes; then
1369 # Either a known package, or "auto"
1370 enable_clocale_flag=$enable_clocale
1372 # Probe for locale support if no specific model is specified.
1373 # Default to "generic".
1374 if test $enable_clocale_flag = auto; then
1375 case ${target_os} in
1376 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1377 AC_EGREP_CPP([_GLIBCXX_ok], [
1378 #include <features.h>
1379 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1382 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1384 # Test for bugs early in glibc-2.2.x series
1385 if test $enable_clocale_flag = gnu; then
1387 #define _GNU_SOURCE 1
1390 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1391 extern __typeof(newlocale) __newlocale;
1392 extern __typeof(duplocale) __duplocale;
1393 extern __typeof(strcoll_l) __strcoll_l;
1397 const char __one[] = "Äuglein Augmen";
1398 const char __two[] = "Äuglein";
1403 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1404 loc_dup = __duplocale(loc);
1405 i = __strcoll_l(__one, __two, loc);
1406 j = __strcoll_l(__one, __two, loc_dup);
1410 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1411 [enable_clocale_flag=generic])
1414 # ... at some point put __strxfrm_l tests in as well.
1417 enable_clocale_flag=darwin
1420 enable_clocale_flag=generic
1425 # Deal with gettext issues. Default to not using it (=no) until we detect
1426 # support for it later. Let the user turn it off via --e/d, but let that
1427 # default to on for easier handling.
1430 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1434 # Set configure bits for specified locale package
1435 case ${enable_clocale_flag} in
1437 AC_MSG_RESULT(generic)
1439 CLOCALE_H=config/locale/generic/c_locale.h
1440 CLOCALE_CC=config/locale/generic/c_locale.cc
1441 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1442 CCOLLATE_CC=config/locale/generic/collate_members.cc
1443 CCTYPE_CC=config/locale/generic/ctype_members.cc
1444 CMESSAGES_H=config/locale/generic/messages_members.h
1445 CMESSAGES_CC=config/locale/generic/messages_members.cc
1446 CMONEY_CC=config/locale/generic/monetary_members.cc
1447 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1448 CTIME_H=config/locale/generic/time_members.h
1449 CTIME_CC=config/locale/generic/time_members.cc
1450 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1453 AC_MSG_RESULT(darwin or freebsd)
1455 CLOCALE_H=config/locale/generic/c_locale.h
1456 CLOCALE_CC=config/locale/generic/c_locale.cc
1457 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1458 CCOLLATE_CC=config/locale/generic/collate_members.cc
1459 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1460 CMESSAGES_H=config/locale/generic/messages_members.h
1461 CMESSAGES_CC=config/locale/generic/messages_members.cc
1462 CMONEY_CC=config/locale/generic/monetary_members.cc
1463 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1464 CTIME_H=config/locale/generic/time_members.h
1465 CTIME_CC=config/locale/generic/time_members.cc
1466 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1472 # Declare intention to use gettext, and add support for specific
1474 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1477 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1478 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1479 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1482 # Export the build objects.
1483 for ling in $ALL_LINGUAS; do \
1484 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1485 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1487 AC_SUBST(glibcxx_MOFILES)
1488 AC_SUBST(glibcxx_POFILES)
1490 CLOCALE_H=config/locale/gnu/c_locale.h
1491 CLOCALE_CC=config/locale/gnu/c_locale.cc
1492 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1493 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1494 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1495 CMESSAGES_H=config/locale/gnu/messages_members.h
1496 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1497 CMONEY_CC=config/locale/gnu/monetary_members.cc
1498 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1499 CTIME_H=config/locale/gnu/time_members.h
1500 CTIME_CC=config/locale/gnu/time_members.cc
1501 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1504 AC_MSG_RESULT(IEEE 1003.1)
1506 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1507 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1508 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1509 CCOLLATE_CC=config/locale/generic/collate_members.cc
1510 CCTYPE_CC=config/locale/generic/ctype_members.cc
1511 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1512 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1513 CMONEY_CC=config/locale/generic/monetary_members.cc
1514 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1515 CTIME_H=config/locale/generic/time_members.h
1516 CTIME_CC=config/locale/generic/time_members.cc
1517 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1521 # This is where the testsuite looks for locale catalogs, using the
1522 # -DLOCALEDIR define during testsuite compilation.
1523 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1524 AC_SUBST(glibcxx_localedir)
1526 # A standalone libintl (e.g., GNU libintl) may be in use.
1527 if test $USE_NLS = yes; then
1528 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1529 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1531 if test $USE_NLS = yes; then
1532 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1533 [Define if NLS translations are to be used.])
1538 AC_SUBST(CMESSAGES_H)
1539 AC_SUBST(CCODECVT_CC)
1540 AC_SUBST(CCOLLATE_CC)
1542 AC_SUBST(CMESSAGES_CC)
1544 AC_SUBST(CNUMERIC_CC)
1547 AC_SUBST(CLOCALE_CC)
1548 AC_SUBST(CLOCALE_INTERNAL_H)
1553 dnl Check for which std::allocator base class to use. The choice is
1554 dnl mapped from a subdirectory of include/ext.
1558 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1559 AC_MSG_CHECKING([for std::allocator base class])
1560 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1561 [use KIND for target std::allocator base],
1562 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1564 # If they didn't use this option switch, or if they specified --enable
1565 # with no specific model, we'll have to look for one. If they
1566 # specified --disable (???), do likewise.
1567 if test $enable_libstdcxx_allocator = no ||
1568 test $enable_libstdcxx_allocator = yes;
1570 enable_libstdcxx_allocator=auto
1573 # Either a known package, or "auto". Auto implies the default choice
1574 # for a particular platform.
1575 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1577 # Probe for host-specific support if no specific model is specified.
1579 if test $enable_libstdcxx_allocator_flag = auto; then
1580 case ${target_os} in
1581 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1582 enable_libstdcxx_allocator_flag=new
1585 enable_libstdcxx_allocator_flag=new
1589 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1592 # Set configure bits for specified locale package
1593 case ${enable_libstdcxx_allocator_flag} in
1595 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1596 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1599 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1600 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1603 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1604 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1607 ALLOCATOR_H=config/allocator/new_allocator_base.h
1608 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1611 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1612 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1616 AC_SUBST(ALLOCATOR_H)
1617 AC_SUBST(ALLOCATOR_NAME)
1622 dnl Check for whether the Boost-derived checks should be turned on.
1624 dnl --enable-concept-checks turns them on.
1625 dnl --disable-concept-checks leaves them off.
1626 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1627 dnl Where DEFAULT is either `yes' or `no'.
1629 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1630 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1631 if test $enable_concept_checks = yes; then
1632 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1633 [Define to use concept checking code from the boost libraries.])
1639 dnl Check for which I/O library to use: stdio, or something specific.
1641 dnl Default is stdio.
1643 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1644 AC_MSG_CHECKING([for underlying I/O to use])
1645 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1646 [use target-specific I/O package], [permit stdio])
1648 # Now that libio has been removed, you can have any color you want as long
1649 # as it's black. This is one big no-op until other packages are added, but
1650 # showing the framework never hurts.
1651 case ${enable_cstdio} in
1653 CSTDIO_H=config/io/c_io_stdio.h
1654 BASIC_FILE_H=config/io/basic_file_stdio.h
1655 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1656 AC_MSG_RESULT(stdio)
1661 AC_SUBST(BASIC_FILE_H)
1662 AC_SUBST(BASIC_FILE_CC)
1667 dnl Check for "unusual" flags to pass to the compiler while building.
1669 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1670 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1671 dnl --disable-cxx-flags passes nothing.
1672 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1673 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1674 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1675 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1676 dnl If "default flags" is an empty string, the effect is the same
1677 dnl as --disable or --enable=no.
1679 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1680 AC_MSG_CHECKING([for extra compiler flags for building])
1681 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1682 [pass compiler FLAGS when building library],
1683 [case "x$enable_cxx_flags" in
1684 xno | x) enable_cxx_flags= ;;
1686 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1689 # Run through flags (either default or command-line) and set anything
1690 # extra (e.g., #defines) that must accompany particular g++ options.
1691 if test -n "$enable_cxx_flags"; then
1692 for f in $enable_cxx_flags; do
1696 *) # and we're trying to pass /what/ exactly?
1697 AC_MSG_ERROR([compiler flags start with a -]) ;;
1702 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1703 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1704 AC_SUBST(EXTRA_CXX_FLAGS)
1709 dnl Check to see if debugging libraries are to be built.
1711 dnl --enable-libstdcxx-debug
1712 dnl builds a separate set of debugging libraries in addition to the
1713 dnl normal (shared, static) libstdc++ binaries.
1715 dnl --disable-libstdcxx-debug
1716 dnl builds only one (non-debug) version of libstdc++.
1718 dnl --enable-libstdcxx-debug-flags=FLAGS
1719 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1721 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1722 dnl Where DEFAULT is either `yes' or `no'.
1724 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1725 AC_MSG_CHECKING([for additional debug build])
1726 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1727 AC_MSG_RESULT($enable_libstdcxx_debug)
1728 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1733 dnl Check for explicit debug flags.
1735 dnl --enable-libstdcxx-debug-flags='-O1'
1736 dnl is a general method for passing flags to be used when
1737 dnl building debug libraries with --enable-debug.
1739 dnl --disable-libstdcxx-debug-flags does nothing.
1740 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1741 dnl If "default flags" is an empty string, the effect is the same
1742 dnl as --disable or --enable=no.
1744 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1745 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1746 [pass compiler FLAGS when building debug library],
1747 [case "x$enable_libstdcxx_debug_flags" in
1748 xno | x) enable_libstdcxx_debug_flags= ;;
1750 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1753 # Option parsed, now set things appropriately
1754 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1755 AC_SUBST(DEBUG_FLAGS)
1757 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1762 dnl Check if the user only wants a freestanding library implementation.
1764 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1765 dnl installing only the headers required by [17.4.1.3] and the language
1766 dnl support library. More than that will be built (to keep the Makefiles
1767 dnl conveniently clean), but not installed.
1770 dnl is_hosted (yes/no)
1773 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1775 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1776 AC_ARG_ENABLE([hosted-libstdcxx],
1777 AC_HELP_STRING([--disable-hosted-libstdcxx],
1778 [only build freestanding C++ runtime support]),,
1781 enable_hosted_libstdcxx=no
1784 enable_hosted_libstdcxx=yes
1787 if test "$enable_hosted_libstdcxx" = no; then
1788 AC_MSG_NOTICE([Only freestanding libraries will be built])
1792 enable_libstdcxx_pch=no
1797 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1798 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1799 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1804 dnl Check for template specializations for the 'long long' type.
1805 dnl The result determines only whether 'long long' I/O is enabled; things
1806 dnl like numeric_limits<> specializations are always available.
1808 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1809 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1810 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1811 dnl Where DEFAULT is either `yes' or `no'.
1813 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1814 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1815 if test $enable_long_long = yes; then
1816 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1817 [Define if code specialized for long long should be used.])
1819 AC_MSG_CHECKING([for enabled long long specializations])
1820 AC_MSG_RESULT([$enable_long_long])
1825 dnl Check for template specializations for the 'wchar_t' type.
1827 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1828 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1829 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1830 dnl Where DEFAULT is either `yes' or `no'.
1832 dnl Necessary support (probed along with C99 support) must also be present.
1834 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1835 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1836 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1837 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1838 [Define if code specialized for wchar_t should be used.])
1840 AC_MSG_CHECKING([for enabled wchar_t specializations])
1841 AC_MSG_RESULT([$enable_wchar_t])
1846 dnl Check to see if building and using a C++ precompiled header can be done.
1848 dnl --enable-libstdcxx-pch=yes
1849 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1850 dnl may work, after some light-hearted attempts to puzzle out compiler
1851 dnl support, flip bits on in include/Makefile.am
1853 dnl --disable-libstdcxx-pch
1854 dnl turns off attempts to use or build stdc++.h.gch.
1857 dnl glibcxx_PCHFLAGS
1859 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1860 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1861 if test $enable_libstdcxx_pch = yes; then
1862 AC_CACHE_CHECK([for compiler with PCH support],
1863 [glibcxx_cv_prog_CXX_pch],
1864 [ac_save_CXXFLAGS="$CXXFLAGS"
1865 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1868 echo '#include <math.h>' > conftest.h
1869 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1870 -o conftest.h.gch 1>&5 2>&1 &&
1871 echo '#error "pch failed"' > conftest.h &&
1872 echo '#include "conftest.h"' > conftest.cc &&
1873 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1875 glibcxx_cv_prog_CXX_pch=yes
1877 glibcxx_cv_prog_CXX_pch=no
1880 CXXFLAGS=$ac_save_CXXFLAGS
1883 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1886 AC_MSG_CHECKING([for enabled PCH])
1887 AC_MSG_RESULT([$enable_libstdcxx_pch])
1889 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1890 if test $enable_libstdcxx_pch = yes; then
1891 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1895 AC_SUBST(glibcxx_PCHFLAGS)
1900 dnl Check for exception handling support. If an explicit enable/disable
1901 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1902 dnl target may or may not support call frame exceptions.
1904 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1905 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1906 dnl Neither one forces an attempt at detection.
1909 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1911 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1912 AC_MSG_CHECKING([for exception model to use])
1915 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1916 [force use of builtin_setjmp for exceptions],
1917 [permit yes|no|auto])
1919 if test $enable_sjlj_exceptions = auto; then
1920 # Botheration. Now we've got to detect the exception model. Link tests
1921 # against libgcc.a are problematic since we've not been given proper -L
1922 # bits for single-tree newlib and libgloss.
1924 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1925 cat > conftest.$ac_ext << EOF
1926 [#]line __oline__ "configure"
1935 old_CXXFLAGS="$CXXFLAGS"
1937 if AC_TRY_EVAL(ac_compile); then
1938 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1939 enable_sjlj_exceptions=yes
1940 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1941 enable_sjlj_exceptions=no
1942 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
1943 enable_sjlj_exceptions=no
1946 CXXFLAGS="$old_CXXFLAGS"
1950 # This is a tad weird, for hysterical raisins. We have to map
1951 # enable/disable to two different models.
1952 case $enable_sjlj_exceptions in
1954 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1955 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1956 ac_exception_model_name=sjlj
1959 ac_exception_model_name="call frame"
1962 AC_MSG_ERROR([unable to detect exception model])
1966 AC_MSG_RESULT($ac_exception_model_name)
1971 dnl Add version tags to symbols in shared library (or not), additionally
1972 dnl marking other symbols as private/local (or not).
1974 dnl --enable-symvers=style adds a version script to the linker call when
1975 dnl creating the shared library. The choice of version script is
1976 dnl controlled by 'style'.
1977 dnl --disable-symvers does not.
1978 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1979 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1980 dnl choose a default style based on linker characteristics. Passing
1981 dnl 'no' disables versioning.
1983 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1985 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1986 [enables symbol versioning of the shared library],
1987 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
1989 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1990 # don't know enough about $LD to do tricks...
1991 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1993 # Turn a 'yes' into a suitable default.
1994 if test x$enable_symvers = xyes ; then
1995 if test $enable_shared = no || test "x$LD" = x ; then
1998 if test $with_gnu_ld = yes ; then
2001 case ${target_os} in
2003 enable_symvers=darwin ;;
2005 enable_symvers=no ;;
2011 # Check to see if 'darwin' or 'darwin-export' can win.
2012 if test x$enable_symvers = xdarwin-export ; then
2013 enable_symvers=darwin
2016 # Check to see if 'gnu' can win.
2017 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2018 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2019 AC_MSG_CHECKING([for shared libgcc])
2020 ac_save_CFLAGS="$CFLAGS"
2022 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2023 CFLAGS="$ac_save_CFLAGS"
2024 if test $glibcxx_shared_libgcc = no; then
2025 cat > conftest.c <<EOF
2026 int main (void) { return 0; }
2029 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2030 -shared -shared-libgcc -o conftest.so \
2031 conftest.c -v 2>&1 >/dev/null \
2032 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2034 rm -f conftest.c conftest.so
2035 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2036 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2037 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2038 CFLAGS="$ac_save_CFLAGS"
2041 AC_MSG_RESULT($glibcxx_shared_libgcc)
2043 # For GNU ld, we need at least this version. The format is described in
2044 # GLIBCXX_CHECK_LINKER_FEATURES above.
2045 glibcxx_min_gnu_ld_version=21400
2047 # If no shared libgcc, can't win.
2048 if test $glibcxx_shared_libgcc != yes; then
2049 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2050 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2051 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2053 elif test $with_gnu_ld != yes ; then
2055 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2056 AC_MSG_WARN([=== you are not using the GNU linker.])
2057 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2059 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2060 # The right tools, the right setup, but too old. Fallbacks?
2061 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2062 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2063 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2064 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2065 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2070 # Everything parsed; figure out what file to use.
2071 case $enable_symvers in
2073 SYMVER_FILE=config/abi/pre/none.ver
2076 SYMVER_FILE=config/abi/pre/gnu.ver
2077 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2078 [Define to use GNU versioning in the shared library.])
2080 gnu-versioned-namespace)
2081 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2082 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2083 [Define to use GNU namespace versioning in the shared library.])
2086 SYMVER_FILE=config/abi/pre/gnu.ver
2087 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2088 [Define to use darwin versioning in the shared library.])
2092 if test x$enable_symvers != xno ; then
2093 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2094 [Define to use symbol versioning in the shared library.])
2097 AC_SUBST(SYMVER_FILE)
2098 AC_SUBST(port_specific_symbol_files)
2099 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2100 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2101 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2102 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2103 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2105 # Now, set up compatibility support, if any.
2106 # In addition, need this to deal with std::size_t mangling in
2107 # src/compatibility.cc. In a perfect world, could use
2108 # typeid(std::size_t).name()[0] to do direct substitution.
2109 AC_MSG_CHECKING([for size_t as unsigned int])
2110 ac_save_CFLAGS="$CFLAGS"
2112 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2113 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2114 CFLAGS=$ac_save_CFLAGS
2115 if test "$glibcxx_size_t_is_i" = yes; then
2116 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2118 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2120 AC_MSG_CHECKING([for ptrdiff_t as int])
2121 ac_save_CFLAGS="$CFLAGS"
2123 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2124 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2125 CFLAGS=$ac_save_CFLAGS
2126 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2127 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2129 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2134 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2135 dnl We must stage the required headers so that they will be installed
2136 dnl with the library (unlike libgcc, the STL implementation is provided
2137 dnl solely within headers). Since we must not inject random user-space
2138 dnl macro names into user-provided C++ code, we first stage into <file>-in
2139 dnl and process to <file> with an output command. The reason for a two-
2140 dnl stage process here is to correctly handle $srcdir!=$objdir without
2141 dnl having to write complex code (the sed commands to clean the macro
2142 dnl namespace are complex and fragile enough as it is). We must also
2143 dnl add a relative path so that -I- is supported properly.
2146 dnl glibcxx_thread_h
2149 dnl HAVE_GTHR_DEFAULT
2151 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2152 AC_MSG_CHECKING([for thread model used by GCC])
2153 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2154 AC_MSG_RESULT([$target_thread_file])
2156 if test $target_thread_file != single; then
2157 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2158 [Define if gthr-default.h exists
2159 (meaning that threading support is enabled).])
2162 glibcxx_thread_h=gthr-$target_thread_file.h
2164 dnl Check for __GTHREADS define.
2165 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2166 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2172 AC_SUBST(glibcxx_thread_h)
2176 # Check whether LC_MESSAGES is available in <locale.h>.
2177 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2179 # This file file be copied and used freely without restrictions. It can
2180 # be used in projects which are not available under the GNU Public License
2181 # but which still want to provide support for the GNU gettext functionality.
2182 # Please note that the actual code is *not* freely available.
2185 AC_DEFUN([AC_LC_MESSAGES], [
2186 AC_CHECK_HEADER(locale.h, [
2187 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2188 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2189 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2190 if test $ac_cv_val_LC_MESSAGES = yes; then
2191 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2192 [Define if LC_MESSAGES is available in <locale.h>.])
2197 # Macros from the top-level gcc directory.
2198 m4_include([../config/tls.m4])