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 <inttypes.h> functions (NB: doesn't make
1185 # sense if the previous check fails, per C99, 7.8/1).
1186 ac_c99_inttypes_tr1=no;
1187 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1188 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1189 AC_TRY_COMPILE([#include <inttypes.h>],
1190 [intmax_t i, numer, denom, base;
1193 intmax_t ret = imaxabs(i);
1194 imaxdiv_t dret = imaxdiv(numer, denom);
1195 ret = strtoimax(s, endptr, base);
1196 uintmax_t uret = strtoumax(s, endptr, base);
1197 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1199 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1200 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1201 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1202 [Define if C99 functions in <inttypes.h> should be imported in
1203 <tr1/cinttypes> in namespace std::tr1.])
1206 # Check for the existence of <wchar.h> functions.
1207 AC_MSG_CHECKING([for ISO C99 support to TR1 in <wchar.h>])
1208 AC_CACHE_VAL(ac_c99_wchar_tr1, [
1209 AC_TRY_COMPILE([#include <wchar.h>
1211 #include <stdarg.h>],
1212 [const wchar_t* nptr;
1213 const wchar_t* format;
1219 float fret = wcstof(nptr, endptr);
1220 long double ldret = wcstold(nptr, endptr);
1221 int ret = vfwscanf(stream, format, arg);
1222 ret = vswscanf(s, format, arg);
1223 ret = vwscanf(format, arg);
1224 long long llret = wcstoll(nptr, endptr, base);
1225 unsigned long long ullret = wcstoull(nptr, endptr, base);
1226 ],[ac_c99_wchar_tr1=yes], [ac_c99_wchar_tr1=no])
1228 AC_MSG_RESULT($ac_c99_wchar_tr1)
1229 if test x"$ac_c99_wchar_tr1" = x"yes"; then
1230 AC_DEFINE(_GLIBCXX_USE_C99_WCHAR_TR1, 1,
1231 [Define if C99 functions in <wchar.h> should be imported in
1232 <tr1/cwchar> in namespace std::tr1.])
1235 # Check for the existence of <wctype.h> functions.
1236 AC_MSG_CHECKING([for ISO C99 support to TR1 in <wctype.h>])
1237 AC_CACHE_VAL(ac_c99_wctype_tr1, [
1238 AC_TRY_COMPILE([#include <wctype.h>],
1240 int ret = iswblank(ch);
1241 ],[ac_c99_wctype_tr1=yes], [ac_c99_wctype_tr1=no])
1243 AC_MSG_RESULT($ac_c99_wctype_tr1)
1244 if test x"$ac_c99_wctype_tr1" = x"yes"; then
1245 AC_DEFINE(_GLIBCXX_USE_C99_WCTYPE_TR1, 1,
1246 [Define if C99 functions in <wctype.h> should be imported in
1247 <tr1/cwctype> in namespace std::tr1.])
1255 dnl Check for what type of C headers to use.
1257 dnl --enable-cheaders= [does stuff].
1258 dnl --disable-cheaders [does not do anything, really].
1259 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1260 dnl Where DEFAULT is either `c' or `c_std'.
1262 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1263 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1264 [construct "C" headers for g++], [permit c|c_std])
1265 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1267 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1269 AC_SUBST(C_INCLUDE_DIR)
1270 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1271 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1272 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1277 dnl Check for which locale library to use. The choice is mapped to
1278 dnl a subdirectory of config/locale.
1280 dnl Default is generic.
1282 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1283 AC_MSG_CHECKING([for C locale to use])
1284 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1285 [use MODEL for target locale package],
1286 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1288 # If they didn't use this option switch, or if they specified --enable
1289 # with no specific model, we'll have to look for one. If they
1290 # specified --disable (???), do likewise.
1291 if test $enable_clocale = no || test $enable_clocale = yes; then
1295 # Either a known package, or "auto"
1296 enable_clocale_flag=$enable_clocale
1298 # Probe for locale support if no specific model is specified.
1299 # Default to "generic".
1300 if test $enable_clocale_flag = auto; then
1301 case ${target_os} in
1302 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1303 AC_EGREP_CPP([_GLIBCXX_ok], [
1304 #include <features.h>
1305 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1308 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1310 # Test for bugs early in glibc-2.2.x series
1311 if test $enable_clocale_flag = gnu; then
1313 #define _GNU_SOURCE 1
1316 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1317 extern __typeof(newlocale) __newlocale;
1318 extern __typeof(duplocale) __duplocale;
1319 extern __typeof(strcoll_l) __strcoll_l;
1323 const char __one[] = "Äuglein Augmen";
1324 const char __two[] = "Äuglein";
1329 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1330 loc_dup = __duplocale(loc);
1331 i = __strcoll_l(__one, __two, loc);
1332 j = __strcoll_l(__one, __two, loc_dup);
1336 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1337 [enable_clocale_flag=generic])
1340 # ... at some point put __strxfrm_l tests in as well.
1343 enable_clocale_flag=darwin
1346 enable_clocale_flag=generic
1351 # Deal with gettext issues. Default to not using it (=no) until we detect
1352 # support for it later. Let the user turn it off via --e/d, but let that
1353 # default to on for easier handling.
1356 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1360 # Set configure bits for specified locale package
1361 case ${enable_clocale_flag} in
1363 AC_MSG_RESULT(generic)
1365 CLOCALE_H=config/locale/generic/c_locale.h
1366 CLOCALE_CC=config/locale/generic/c_locale.cc
1367 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1368 CCOLLATE_CC=config/locale/generic/collate_members.cc
1369 CCTYPE_CC=config/locale/generic/ctype_members.cc
1370 CMESSAGES_H=config/locale/generic/messages_members.h
1371 CMESSAGES_CC=config/locale/generic/messages_members.cc
1372 CMONEY_CC=config/locale/generic/monetary_members.cc
1373 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1374 CTIME_H=config/locale/generic/time_members.h
1375 CTIME_CC=config/locale/generic/time_members.cc
1376 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1379 AC_MSG_RESULT(darwin or freebsd)
1381 CLOCALE_H=config/locale/generic/c_locale.h
1382 CLOCALE_CC=config/locale/generic/c_locale.cc
1383 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1384 CCOLLATE_CC=config/locale/generic/collate_members.cc
1385 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1386 CMESSAGES_H=config/locale/generic/messages_members.h
1387 CMESSAGES_CC=config/locale/generic/messages_members.cc
1388 CMONEY_CC=config/locale/generic/monetary_members.cc
1389 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1390 CTIME_H=config/locale/generic/time_members.h
1391 CTIME_CC=config/locale/generic/time_members.cc
1392 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1398 # Declare intention to use gettext, and add support for specific
1400 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1403 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1404 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1405 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1408 # Export the build objects.
1409 for ling in $ALL_LINGUAS; do \
1410 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1411 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1413 AC_SUBST(glibcxx_MOFILES)
1414 AC_SUBST(glibcxx_POFILES)
1416 CLOCALE_H=config/locale/gnu/c_locale.h
1417 CLOCALE_CC=config/locale/gnu/c_locale.cc
1418 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1419 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1420 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1421 CMESSAGES_H=config/locale/gnu/messages_members.h
1422 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1423 CMONEY_CC=config/locale/gnu/monetary_members.cc
1424 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1425 CTIME_H=config/locale/gnu/time_members.h
1426 CTIME_CC=config/locale/gnu/time_members.cc
1427 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1430 AC_MSG_RESULT(IEEE 1003.1)
1432 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1433 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1434 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1435 CCOLLATE_CC=config/locale/generic/collate_members.cc
1436 CCTYPE_CC=config/locale/generic/ctype_members.cc
1437 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1438 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1439 CMONEY_CC=config/locale/generic/monetary_members.cc
1440 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1441 CTIME_H=config/locale/generic/time_members.h
1442 CTIME_CC=config/locale/generic/time_members.cc
1443 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1447 # This is where the testsuite looks for locale catalogs, using the
1448 # -DLOCALEDIR define during testsuite compilation.
1449 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1450 AC_SUBST(glibcxx_localedir)
1452 # A standalone libintl (e.g., GNU libintl) may be in use.
1453 if test $USE_NLS = yes; then
1454 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1455 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1457 if test $USE_NLS = yes; then
1458 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1459 [Define if NLS translations are to be used.])
1464 AC_SUBST(CMESSAGES_H)
1465 AC_SUBST(CCODECVT_CC)
1466 AC_SUBST(CCOLLATE_CC)
1468 AC_SUBST(CMESSAGES_CC)
1470 AC_SUBST(CNUMERIC_CC)
1473 AC_SUBST(CLOCALE_CC)
1474 AC_SUBST(CLOCALE_INTERNAL_H)
1479 dnl Check for which std::allocator base class to use. The choice is
1480 dnl mapped from a subdirectory of include/ext.
1484 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1485 AC_MSG_CHECKING([for std::allocator base class])
1486 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1487 [use KIND for target std::allocator base],
1488 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1490 # If they didn't use this option switch, or if they specified --enable
1491 # with no specific model, we'll have to look for one. If they
1492 # specified --disable (???), do likewise.
1493 if test $enable_libstdcxx_allocator = no ||
1494 test $enable_libstdcxx_allocator = yes;
1496 enable_libstdcxx_allocator=auto
1499 # Either a known package, or "auto". Auto implies the default choice
1500 # for a particular platform.
1501 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1503 # Probe for host-specific support if no specific model is specified.
1505 if test $enable_libstdcxx_allocator_flag = auto; then
1506 case ${target_os} in
1507 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1508 enable_libstdcxx_allocator_flag=new
1511 enable_libstdcxx_allocator_flag=new
1515 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1518 # Set configure bits for specified locale package
1519 case ${enable_libstdcxx_allocator_flag} in
1521 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1522 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1525 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1526 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1529 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1530 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1533 ALLOCATOR_H=config/allocator/new_allocator_base.h
1534 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1537 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1538 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1542 AC_SUBST(ALLOCATOR_H)
1543 AC_SUBST(ALLOCATOR_NAME)
1548 dnl Check for whether the Boost-derived checks should be turned on.
1550 dnl --enable-concept-checks turns them on.
1551 dnl --disable-concept-checks leaves them off.
1552 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1553 dnl Where DEFAULT is either `yes' or `no'.
1555 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1556 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1557 if test $enable_concept_checks = yes; then
1558 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1559 [Define to use concept checking code from the boost libraries.])
1565 dnl Check for which I/O library to use: stdio, or something specific.
1567 dnl Default is stdio.
1569 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1570 AC_MSG_CHECKING([for underlying I/O to use])
1571 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1572 [use target-specific I/O package], [permit stdio])
1574 # Now that libio has been removed, you can have any color you want as long
1575 # as it's black. This is one big no-op until other packages are added, but
1576 # showing the framework never hurts.
1577 case ${enable_cstdio} in
1579 CSTDIO_H=config/io/c_io_stdio.h
1580 BASIC_FILE_H=config/io/basic_file_stdio.h
1581 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1582 AC_MSG_RESULT(stdio)
1587 AC_SUBST(BASIC_FILE_H)
1588 AC_SUBST(BASIC_FILE_CC)
1593 dnl Check for "unusual" flags to pass to the compiler while building.
1595 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1596 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1597 dnl --disable-cxx-flags passes nothing.
1598 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1599 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1600 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1601 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1602 dnl If "default flags" is an empty string, the effect is the same
1603 dnl as --disable or --enable=no.
1605 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1606 AC_MSG_CHECKING([for extra compiler flags for building])
1607 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1608 [pass compiler FLAGS when building library],
1609 [case "x$enable_cxx_flags" in
1610 xno | x) enable_cxx_flags= ;;
1612 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1615 # Run through flags (either default or command-line) and set anything
1616 # extra (e.g., #defines) that must accompany particular g++ options.
1617 if test -n "$enable_cxx_flags"; then
1618 for f in $enable_cxx_flags; do
1622 *) # and we're trying to pass /what/ exactly?
1623 AC_MSG_ERROR([compiler flags start with a -]) ;;
1628 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1629 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1630 AC_SUBST(EXTRA_CXX_FLAGS)
1635 dnl Check to see if debugging libraries are to be built.
1637 dnl --enable-libstdcxx-debug
1638 dnl builds a separate set of debugging libraries in addition to the
1639 dnl normal (shared, static) libstdc++ binaries.
1641 dnl --disable-libstdcxx-debug
1642 dnl builds only one (non-debug) version of libstdc++.
1644 dnl --enable-libstdcxx-debug-flags=FLAGS
1645 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1647 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1648 dnl Where DEFAULT is either `yes' or `no'.
1650 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1651 AC_MSG_CHECKING([for additional debug build])
1652 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1653 AC_MSG_RESULT($enable_libstdcxx_debug)
1654 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1659 dnl Check for explicit debug flags.
1661 dnl --enable-libstdcxx-debug-flags='-O1'
1662 dnl is a general method for passing flags to be used when
1663 dnl building debug libraries with --enable-debug.
1665 dnl --disable-libstdcxx-debug-flags does nothing.
1666 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1667 dnl If "default flags" is an empty string, the effect is the same
1668 dnl as --disable or --enable=no.
1670 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1671 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1672 [pass compiler FLAGS when building debug library],
1673 [case "x$enable_libstdcxx_debug_flags" in
1674 xno | x) enable_libstdcxx_debug_flags= ;;
1676 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1679 # Option parsed, now set things appropriately
1680 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1681 AC_SUBST(DEBUG_FLAGS)
1683 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1688 dnl Check if the user only wants a freestanding library implementation.
1690 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1691 dnl installing only the headers required by [17.4.1.3] and the language
1692 dnl support library. More than that will be built (to keep the Makefiles
1693 dnl conveniently clean), but not installed.
1696 dnl is_hosted (yes/no)
1699 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1701 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1702 AC_ARG_ENABLE([hosted-libstdcxx],
1703 AC_HELP_STRING([--disable-hosted-libstdcxx],
1704 [only build freestanding C++ runtime support]),,
1707 enable_hosted_libstdcxx=no
1710 enable_hosted_libstdcxx=yes
1713 if test "$enable_hosted_libstdcxx" = no; then
1714 AC_MSG_NOTICE([Only freestanding libraries will be built])
1718 enable_libstdcxx_pch=no
1723 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1724 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1725 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1730 dnl Check for template specializations for the 'long long' type.
1731 dnl The result determines only whether 'long long' I/O is enabled; things
1732 dnl like numeric_limits<> specializations are always available.
1734 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1735 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1736 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1737 dnl Where DEFAULT is either `yes' or `no'.
1739 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1740 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1741 if test $enable_long_long = yes; then
1742 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1743 [Define if code specialized for long long should be used.])
1745 AC_MSG_CHECKING([for enabled long long specializations])
1746 AC_MSG_RESULT([$enable_long_long])
1751 dnl Check for template specializations for the 'wchar_t' type.
1753 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1754 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1755 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1756 dnl Where DEFAULT is either `yes' or `no'.
1758 dnl Necessary support (probed along with C99 support) must also be present.
1760 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1761 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1762 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1763 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1764 [Define if code specialized for wchar_t should be used.])
1766 AC_MSG_CHECKING([for enabled wchar_t specializations])
1767 AC_MSG_RESULT([$enable_wchar_t])
1772 dnl Check to see if building and using a C++ precompiled header can be done.
1774 dnl --enable-libstdcxx-pch=yes
1775 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1776 dnl may work, after some light-hearted attempts to puzzle out compiler
1777 dnl support, flip bits on in include/Makefile.am
1779 dnl --disable-libstdcxx-pch
1780 dnl turns off attempts to use or build stdc++.h.gch.
1783 dnl glibcxx_PCHFLAGS
1785 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1786 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1787 if test $enable_libstdcxx_pch = yes; then
1788 AC_CACHE_CHECK([for compiler with PCH support],
1789 [glibcxx_cv_prog_CXX_pch],
1790 [ac_save_CXXFLAGS="$CXXFLAGS"
1791 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1794 echo '#include <math.h>' > conftest.h
1795 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1796 -o conftest.h.gch 1>&5 2>&1 &&
1797 echo '#error "pch failed"' > conftest.h &&
1798 echo '#include "conftest.h"' > conftest.cc &&
1799 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1801 glibcxx_cv_prog_CXX_pch=yes
1803 glibcxx_cv_prog_CXX_pch=no
1806 CXXFLAGS=$ac_save_CXXFLAGS
1809 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1812 AC_MSG_CHECKING([for enabled PCH])
1813 AC_MSG_RESULT([$enable_libstdcxx_pch])
1815 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1816 if test $enable_libstdcxx_pch = yes; then
1817 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1821 AC_SUBST(glibcxx_PCHFLAGS)
1826 dnl Check for exception handling support. If an explicit enable/disable
1827 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1828 dnl target may or may not support call frame exceptions.
1830 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1831 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1832 dnl Neither one forces an attempt at detection.
1835 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1837 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1838 AC_MSG_CHECKING([for exception model to use])
1841 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1842 [force use of builtin_setjmp for exceptions],
1843 [permit yes|no|auto])
1845 if test $enable_sjlj_exceptions = auto; then
1846 # Botheration. Now we've got to detect the exception model. Link tests
1847 # against libgcc.a are problematic since we've not been given proper -L
1848 # bits for single-tree newlib and libgloss.
1850 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1851 cat > conftest.$ac_ext << EOF
1852 [#]line __oline__ "configure"
1861 old_CXXFLAGS="$CXXFLAGS"
1863 if AC_TRY_EVAL(ac_compile); then
1864 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1865 enable_sjlj_exceptions=yes
1866 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1867 enable_sjlj_exceptions=no
1868 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
1869 enable_sjlj_exceptions=no
1872 CXXFLAGS="$old_CXXFLAGS"
1876 # This is a tad weird, for hysterical raisins. We have to map
1877 # enable/disable to two different models.
1878 case $enable_sjlj_exceptions in
1880 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1881 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1882 ac_exception_model_name=sjlj
1885 ac_exception_model_name="call frame"
1888 AC_MSG_ERROR([unable to detect exception model])
1892 AC_MSG_RESULT($ac_exception_model_name)
1897 dnl Add version tags to symbols in shared library (or not), additionally
1898 dnl marking other symbols as private/local (or not).
1900 dnl --enable-symvers=style adds a version script to the linker call when
1901 dnl creating the shared library. The choice of version script is
1902 dnl controlled by 'style'.
1903 dnl --disable-symvers does not.
1904 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1905 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1906 dnl choose a default style based on linker characteristics. Passing
1907 dnl 'no' disables versioning.
1909 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1911 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1912 [enables symbol versioning of the shared library],
1913 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
1915 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1916 # don't know enough about $LD to do tricks...
1917 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1919 # Turn a 'yes' into a suitable default.
1920 if test x$enable_symvers = xyes ; then
1921 if test $enable_shared = no || test "x$LD" = x ; then
1924 if test $with_gnu_ld = yes ; then
1927 case ${target_os} in
1929 enable_symvers=darwin ;;
1931 enable_symvers=no ;;
1937 # Check to see if 'darwin' or 'darwin-export' can win.
1938 if test x$enable_symvers = xdarwin-export ; then
1939 enable_symvers=darwin
1942 # Check to see if 'gnu' can win.
1943 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
1944 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1945 AC_MSG_CHECKING([for shared libgcc])
1946 ac_save_CFLAGS="$CFLAGS"
1948 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1949 CFLAGS="$ac_save_CFLAGS"
1950 if test $glibcxx_shared_libgcc = no; then
1951 cat > conftest.c <<EOF
1952 int main (void) { return 0; }
1955 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1956 -shared -shared-libgcc -o conftest.so \
1957 conftest.c -v 2>&1 >/dev/null \
1958 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1960 rm -f conftest.c conftest.so
1961 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1962 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1963 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1964 CFLAGS="$ac_save_CFLAGS"
1967 AC_MSG_RESULT($glibcxx_shared_libgcc)
1969 # For GNU ld, we need at least this version. The format is described in
1970 # GLIBCXX_CHECK_LINKER_FEATURES above.
1971 glibcxx_min_gnu_ld_version=21400
1973 # If no shared libgcc, can't win.
1974 if test $glibcxx_shared_libgcc != yes; then
1975 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
1976 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
1977 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1979 elif test $with_gnu_ld != yes ; then
1981 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
1982 AC_MSG_WARN([=== you are not using the GNU linker.])
1983 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1985 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
1986 # The right tools, the right setup, but too old. Fallbacks?
1987 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1988 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1989 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1990 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1991 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1996 # Everything parsed; figure out what file to use.
1997 case $enable_symvers in
1999 SYMVER_FILE=config/abi/pre/none.ver
2002 SYMVER_FILE=config/abi/pre/gnu.ver
2003 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2004 [Define to use GNU versioning in the shared library.])
2006 gnu-versioned-namespace)
2007 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2008 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2009 [Define to use GNU namespace versioning in the shared library.])
2012 SYMVER_FILE=config/abi/pre/gnu.ver
2013 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2014 [Define to use darwin versioning in the shared library.])
2018 if test x$enable_symvers != xno ; then
2019 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2020 [Define to use symbol versioning in the shared library.])
2023 AC_SUBST(SYMVER_FILE)
2024 AC_SUBST(port_specific_symbol_files)
2025 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2026 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2027 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2028 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2029 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2031 # Now, set up compatibility support, if any.
2032 # In addition, need this to deal with std::size_t mangling in
2033 # src/compatibility.cc. In a perfect world, could use
2034 # typeid(std::size_t).name()[0] to do direct substitution.
2035 AC_MSG_CHECKING([for size_t as unsigned int])
2036 ac_save_CFLAGS="$CFLAGS"
2038 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2039 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2040 CFLAGS=$ac_save_CFLAGS
2041 if test "$glibcxx_size_t_is_i" = yes; then
2042 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2044 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2046 AC_MSG_CHECKING([for ptrdiff_t as int])
2047 ac_save_CFLAGS="$CFLAGS"
2049 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2050 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2051 CFLAGS=$ac_save_CFLAGS
2052 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2053 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2055 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2060 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2061 dnl We must stage the required headers so that they will be installed
2062 dnl with the library (unlike libgcc, the STL implementation is provided
2063 dnl solely within headers). Since we must not inject random user-space
2064 dnl macro names into user-provided C++ code, we first stage into <file>-in
2065 dnl and process to <file> with an output command. The reason for a two-
2066 dnl stage process here is to correctly handle $srcdir!=$objdir without
2067 dnl having to write complex code (the sed commands to clean the macro
2068 dnl namespace are complex and fragile enough as it is). We must also
2069 dnl add a relative path so that -I- is supported properly.
2072 dnl glibcxx_thread_h
2075 dnl HAVE_GTHR_DEFAULT
2077 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2078 AC_MSG_CHECKING([for thread model used by GCC])
2079 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2080 AC_MSG_RESULT([$target_thread_file])
2082 if test $target_thread_file != single; then
2083 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2084 [Define if gthr-default.h exists
2085 (meaning that threading support is enabled).])
2088 glibcxx_thread_h=gthr-$target_thread_file.h
2090 dnl Check for __GTHREADS define.
2091 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2092 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2098 AC_SUBST(glibcxx_thread_h)
2102 # Check whether LC_MESSAGES is available in <locale.h>.
2103 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2105 # This file file be copied and used freely without restrictions. It can
2106 # be used in projects which are not available under the GNU Public License
2107 # but which still want to provide support for the GNU gettext functionality.
2108 # Please note that the actual code is *not* freely available.
2111 AC_DEFUN([AC_LC_MESSAGES], [
2112 AC_CHECK_HEADER(locale.h, [
2113 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2114 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2115 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2116 if test $ac_cv_val_LC_MESSAGES = yes; then
2117 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2118 [Define if LC_MESSAGES is available in <locale.h>.])
2123 # Macros from the top-level gcc directory.
2124 m4_include([../config/tls.m4])