3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
27 AC_MSG_NOTICE([OS config directory is $os_include_dir])
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
63 toplevel_srcdir=${glibcxx_srcdir}/..
64 AC_SUBST(glibcxx_builddir)
65 AC_SUBST(glibcxx_srcdir)
66 AC_SUBST(toplevel_srcdir)
68 # We use these options to decide which functions to include. They are
69 # set from the top level.
70 AC_ARG_WITH([target-subdir],
71 AC_HELP_STRING([--with-target-subdir=SUBDIR],
72 [configuring in a subdirectory]))
74 AC_ARG_WITH([cross-host],
75 AC_HELP_STRING([--with-cross-host=HOST],
76 [configuring with a cross compiler]))
79 AC_HELP_STRING([--with-newlib],
80 [assume newlib as a system C library]))
82 # We're almost certainly being configured before anything else which uses
83 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
84 # we not cache the value of CXX that we "discover" here, because it's set
85 # to something unique for us and libjava. Other target libraries need to
86 # find CXX for themselves. We yank the rug out from under the normal AC_*
87 # process by sneakily renaming the cache variable. This also lets us debug
88 # the value of "our" CXX in postmortems.
90 # We must also force CXX to /not/ be a precious variable, otherwise the
91 # wrong (non-multilib-adjusted) value will be used in multilibs. This
92 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
93 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
94 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
96 # -fno-builtin must be present here so that a non-conflicting form of
97 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
99 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
100 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
101 m4_define([_AC_ARG_VAR_PRECIOUS],[])
102 save_CXXFLAGS="$CXXFLAGS"
103 CXXFLAGS="$CXXFLAGS -fno-builtin"
106 CXXFLAGS="$save_CXXFLAGS"
107 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
111 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
112 # available). Uncomment the next line to force a particular method.
116 AC_CHECK_TOOL(AS, as)
117 AC_CHECK_TOOL(AR, ar)
118 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
122 # Set up safe default values for all subsequent AM_CONDITIONAL tests
123 # which are themselves conditionally expanded.
124 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
125 ## other macros from doing the same. This should be automated.) -pme
128 # Check for uClibc since Linux platforms use different configuration
129 # directories depending on the C library in use.
130 AC_EGREP_CPP([_using_uclibc], [
135 ], uclibc=yes, uclibc=no)
137 # Find platform-specific directories containing configuration info.
138 # Also possibly modify flags used elsewhere, as needed by the platform.
144 dnl Tests for newer compiler features, or features that are present in newer
145 dnl compiler versions but not older compiler versions still in use, should
149 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
150 dnl new inlining code or the new system_header pragma will die on -Werror.
151 dnl Leave it out by default and use maint-mode to use it.
152 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
153 dnl compiler supports it and the user has not requested debug mode.
155 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
156 # All these tests are for C++; save the language and the compiler flags.
157 # The CXXFLAGS thing is suspicious, but based on similar bits previously
158 # found in GLIBCXX_CONFIGURE.
161 ac_test_CXXFLAGS="${CXXFLAGS+set}"
162 ac_save_CXXFLAGS="$CXXFLAGS"
164 # Check for maintainer-mode bits.
165 if test x"$USE_MAINTAINER_MODE" = xno; then
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$ac_test_CXXFLAGS" = set; then
176 CXXFLAGS="$ac_save_CXXFLAGS"
178 # this is the suspicious part
181 if test x"$ac_fdsections" = x"yes"; then
182 SECTION_FLAGS='-ffunction-sections -fdata-sections'
184 AC_MSG_RESULT($ac_fdsections)
188 AC_SUBST(SECTION_FLAGS)
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
203 dnl glibcxx_gnu_ld_version (possibly)
205 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
206 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
208 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
209 # If we're not using GNU ld, then there's no point in even trying these
210 # tests. Check for that first. We should have already tested for gld
211 # by now (in libtool), but require it now just to be safe...
212 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
213 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
214 AC_REQUIRE([AC_PROG_LD])
215 AC_REQUIRE([AC_PROG_AWK])
217 # The name set by libtool depends on the version of libtool. Shame on us
218 # for depending on an impl detail, but c'est la vie. Older versions used
219 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
220 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
221 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
222 # set (hence we're using an older libtool), then set it.
223 if test x${with_gnu_ld+set} != xset; then
224 if test x${ac_cv_prog_gnu_ld+set} != xset; then
225 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
228 with_gnu_ld=$ac_cv_prog_gnu_ld
232 # Start by getting the version number. I think the libtool test already
233 # does some of this, but throws away the result.
234 if test x"$with_gnu_ld" = x"yes"; then
235 AC_MSG_CHECKING([for ld version])
237 ldver=`$LD --version 2>/dev/null | head -1 | \
238 sed -e 's/GNU ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\3/'`
240 glibcxx_gnu_ld_version=`echo $ldver | \
241 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
242 AC_MSG_RESULT($glibcxx_gnu_ld_version)
246 glibcxx_gcsections_min_ld=21602
247 if test x"$with_gnu_ld" = x"yes" &&
248 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
250 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
251 # NB: This flag only works reliably after 2.16.1. Configure tests
252 # for this are difficult, so hard wire a value that should work.
254 # All these tests are for C++, but run with the "C" compiler driver.
255 # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
256 ac_test_CFLAGS="${CFLAGS+set}"
257 ac_save_CFLAGS="$CFLAGS"
258 CFLAGS='-x c++ -Wl,--gc-sections'
260 # Check for -Wl,--gc-sections
261 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
262 AC_TRY_LINK([ int one(void) { return 1; }
263 int two(void) { return 2; }
264 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
265 if test "$ac_gcsections" = "yes"; then
268 if $CC -c conftest.c; then
269 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
270 grep "Warning: gc-sections option ignored" > /dev/null; then
274 rm -f conftest.c conftest.o conftest
276 if test "$ac_gcsections" = "yes"; then
277 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
279 AC_MSG_RESULT($ac_gcsections)
281 if test "$ac_test_CFLAGS" = set; then
282 CFLAGS="$ac_save_CFLAGS"
284 # this is the suspicious part
290 # Note this is only for shared objects.
292 if test x"$with_gnu_ld" = x"yes"; then
293 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
294 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
295 if test -n "$cxx_z_relo"; then
296 OPT_LDFLAGS="-Wl,-z,relro"
299 AC_MSG_RESULT($ac_ld_relro)
302 # Set linker optimization flags.
303 if test x"$with_gnu_ld" = x"yes"; then
304 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
307 AC_SUBST(SECTION_LDFLAGS)
308 AC_SUBST(OPT_LDFLAGS)
313 dnl Check to see if this target can enable the iconv specializations.
314 dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
315 dnl (This must have been previously checked, along with the rest of C99
316 dnl support.) By default, iconv support is disabled.
319 dnl _GLIBCXX_USE_ICONV if all the bits are found.
321 dnl LIBICONV to a -l string containing the iconv library, if needed.
323 AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
326 # Only continue checking if the ISO C99 headers exist and support is on.
327 if test x"$enable_wchar_t" = xyes; then
329 # Use iconv for wchar_t to char conversions. As such, check for
330 # X/Open Portability Guide, version 2 features (XPG2).
331 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
332 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
334 # Check for existence of libiconv.a providing XPG2 wchar_t support.
335 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
337 LIBS="$LIBS $LIBICONV"
340 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
341 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
345 if test x"$ac_has_iconv_h" = xyes &&
346 test x"$ac_has_langinfo_h" = xyes &&
347 test x"$ac_XPG2funcs" = xyes;
349 AC_DEFINE([_GLIBCXX_USE_ICONV],1,
350 [Define if iconv and related functions exist and are usable.])
354 AC_MSG_CHECKING([for enabled iconv specializations])
355 AC_MSG_RESULT($enable_iconv)
360 dnl Check for headers for, and arguments to, the setrlimit() function.
361 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
364 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
365 dnl various HAVE_LIMIT_* for individual limit names
367 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
368 AC_MSG_CHECKING([for RLIMIT_$1])
371 #include <sys/time.h>
372 #include <sys/resource.h>
374 [ int f = RLIMIT_$1 ; ],
375 [glibcxx_mresult=1], [glibcxx_mresult=0])
376 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
377 [Only used in build directory testsuite_hooks.h.])
378 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
382 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
383 setrlimit_have_headers=yes
384 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
386 [setrlimit_have_headers=no])
387 # If don't have the headers, then we can't run the tests now, and we
388 # won't be seeing any of these during testsuite compilation.
389 if test $setrlimit_have_headers = yes; then
390 # Can't do these in a loop, else the resulting syntax is wrong.
391 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
392 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
393 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
394 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
395 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
397 # Check for rlimit, setrlimit.
398 AC_CACHE_VAL(ac_setrlimit, [
401 #include <sys/time.h>
402 #include <sys/resource.h>
406 [ac_setrlimit=yes], [ac_setrlimit=no])
410 AC_MSG_CHECKING([for testsuite resource limits support])
411 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
413 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
414 [Define if using setrlimit to set resource limits during
419 AC_MSG_RESULT($ac_res_limits)
424 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
425 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
427 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
428 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
429 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
431 [#include <sys/stat.h>],
434 S_ISREG(buffer.st_mode);],
435 [glibcxx_cv_S_ISREG=yes],
436 [glibcxx_cv_S_ISREG=no])
438 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
440 [#include <sys/stat.h>],
443 S_IFREG & buffer.st_mode;],
444 [glibcxx_cv_S_IFREG=yes],
445 [glibcxx_cv_S_IFREG=no])
448 if test $glibcxx_cv_S_ISREG = yes; then
449 AC_DEFINE(HAVE_S_ISREG, 1,
450 [Define if S_IFREG is available in <sys/stat.h>.])
452 elif test $glibcxx_cv_S_IFREG = yes; then
453 AC_DEFINE(HAVE_S_IFREG, 1,
454 [Define if S_IFREG is available in <sys/stat.h>.])
462 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
464 AC_DEFUN([GLIBCXX_CHECK_POLL], [
465 AC_MSG_CHECKING([for poll])
466 AC_CACHE_VAL(glibcxx_cv_POLL, [
469 [struct pollfd pfd[1];
470 pfd[0].events = POLLIN;
472 [glibcxx_cv_POLL=yes],
473 [glibcxx_cv_POLL=no])
475 if test $glibcxx_cv_POLL = yes; then
476 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
478 AC_MSG_RESULT($glibcxx_cv_POLL)
483 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
485 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
486 AC_MSG_CHECKING([for writev])
487 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
489 [#include <sys/uio.h>],
490 [struct iovec iov[2];
492 [glibcxx_cv_WRITEV=yes],
493 [glibcxx_cv_WRITEV=no])
495 if test $glibcxx_cv_WRITEV = yes; then
496 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
498 AC_MSG_RESULT($glibcxx_cv_WRITEV)
503 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
505 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
506 AC_MSG_CHECKING([for int64_t])
507 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
509 [#include <stdint.h>],
511 [glibcxx_cv_INT64_T=yes],
512 [glibcxx_cv_INT64_T=no])
514 if test $glibcxx_cv_INT64_T = yes; then
515 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
517 AC_MSG_RESULT($glibcxx_cv_INT64_T)
522 dnl Check whether LFS support is available.
524 AC_DEFUN([GLIBCXX_CHECK_LFS], [
527 ac_save_CXXFLAGS="$CXXFLAGS"
528 CXXFLAGS="$CXXFLAGS -fno-exceptions"
529 AC_MSG_CHECKING([for LFS support])
530 AC_CACHE_VAL(glibcxx_cv_LFS, [
534 #include <sys/stat.h>
538 fseeko64(fp, 0, SEEK_CUR);
540 lseek64(1, 0, SEEK_CUR);
543 [glibcxx_cv_LFS=yes],
546 if test $glibcxx_cv_LFS = yes; then
547 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
549 AC_MSG_RESULT($glibcxx_cv_LFS)
550 CXXFLAGS="$ac_save_CXXFLAGS"
556 dnl Check for whether a fully dynamic basic_string implementation should
557 dnl be turned on, that does not put empty objects in per-process static
558 dnl memory (mostly useful together with shared memory allocators, see PR
559 dnl libstdc++/16612 for details).
561 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
562 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
563 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
564 dnl Where DEFAULT is either `yes' or `no'.
566 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
567 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
568 if test $enable_fully_dynamic_string = yes; then
569 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
570 [Define if a fully dynamic basic_string is wanted.])
576 dnl Does any necessary configuration of the testsuite directory. Generates
577 dnl the testsuite_hooks.h header.
579 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
583 dnl GLIBCXX_TEST_WCHAR_T
584 dnl GLIBCXX_TEST_THREAD
588 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
589 if $GLIBCXX_IS_NATIVE ; then
590 # Do checks for resource limit functions.
591 GLIBCXX_CHECK_SETRLIMIT
593 # Look for setenv, so that extended locale tests can be performed.
594 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
597 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
598 test $enable_symvers != no; then
601 enable_abi_check=no ;;
603 enable_abi_check=yes ;;
606 # Only build this as native, since automake does not understand
611 # Export file names for ABI checking.
612 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
613 AC_SUBST(baseline_dir)
618 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
622 dnl TOPLEVEL_INCLUDES
624 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
625 # Used for every C++ compile we perform.
627 -I$glibcxx_builddir/include/$host_alias \
628 -I$glibcxx_builddir/include \
629 -I$glibcxx_srcdir/libsupc++"
631 # For Canadian crosses, pick this up too.
632 if test $CANADIAN = yes; then
633 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
636 # Stuff in the actual top level. Currently only used by libsupc++ to
637 # get unwind* headers from the gcc dir.
638 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
639 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
641 # Now, export this to all the little Makefiles....
642 AC_SUBST(GLIBCXX_INCLUDES)
643 AC_SUBST(TOPLEVEL_INCLUDES)
648 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
649 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
652 dnl OPTIMIZE_CXXFLAGS
655 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
656 # Optimization flags that are probably a good idea for thrill-seekers. Just
657 # uncomment the lines below and make, everything else is ready to go...
658 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
660 AC_SUBST(OPTIMIZE_CXXFLAGS)
662 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
668 dnl All installation directory information is determined here.
672 dnl glibcxx_prefixdir
673 dnl glibcxx_toolexecdir
674 dnl glibcxx_toolexeclibdir
676 dnl Assumes cross_compiling bits already done, and with_cross_host in
679 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
680 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
681 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
682 glibcxx_toolexecdir=no
683 glibcxx_toolexeclibdir=no
684 glibcxx_prefixdir=$prefix
686 AC_MSG_CHECKING([for gxx-include-dir])
687 AC_ARG_WITH([gxx-include-dir],
688 AC_HELP_STRING([--with-gxx-include-dir=DIR],
689 [installation directory for include files]),
691 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
692 no) gxx_include_dir=no ;;
693 *) gxx_include_dir=$withval ;;
695 [gxx_include_dir=no])
696 AC_MSG_RESULT($gxx_include_dir)
698 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
699 AC_ARG_ENABLE([version-specific-runtime-libs],
700 AC_HELP_STRING([--enable-version-specific-runtime-libs],
701 [Specify that runtime libraries should be installed in a compiler-specific directory]),
702 [case "$enableval" in
703 yes) version_specific_libs=yes ;;
704 no) version_specific_libs=no ;;
705 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
707 [version_specific_libs=no])
708 AC_MSG_RESULT($version_specific_libs)
710 # Default case for install directory for include files.
711 if test $version_specific_libs = no && test $gxx_include_dir = no; then
712 gxx_include_dir='include/c++/${gcc_version}'
713 if test -n "$with_cross_host" &&
714 test x"$with_cross_host" != x"no"; then
715 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
717 gxx_include_dir='${prefix}/'"$gxx_include_dir"
721 # Version-specific runtime libs processing.
722 if test $version_specific_libs = yes; then
723 # Need the gcc compiler version to know where to install libraries
724 # and header files if --enable-version-specific-runtime-libs option
725 # is selected. FIXME: these variables are misnamed, there are
726 # no executables installed in _toolexecdir or _toolexeclibdir.
727 if test x"$gxx_include_dir" = x"no"; then
728 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
730 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
731 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
734 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
735 # Install a library built with a cross compiler in tooldir, not libdir.
736 if test x"$glibcxx_toolexecdir" = x"no"; then
737 if test -n "$with_cross_host" &&
738 test x"$with_cross_host" != x"no"; then
739 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
740 glibcxx_toolexeclibdir='${toolexecdir}/lib'
742 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
743 glibcxx_toolexeclibdir='${libdir}'
745 multi_os_directory=`$CXX -print-multi-os-directory`
746 case $multi_os_directory in
747 .) ;; # Avoid trailing /.
748 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
752 AC_MSG_CHECKING([for install location])
753 AC_MSG_RESULT($gxx_include_dir)
755 AC_SUBST(glibcxx_prefixdir)
756 AC_SUBST(gxx_include_dir)
757 AC_SUBST(glibcxx_toolexecdir)
758 AC_SUBST(glibcxx_toolexeclibdir)
764 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
765 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
766 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
768 dnl See docs/html/17_intro/configury.html#enable for documentation.
770 m4_define([GLIBCXX_ENABLE],[dnl
771 m4_define([_g_switch],[--enable-$1])dnl
772 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
773 AC_ARG_ENABLE($1,_g_help,
778 m4_bpatsubst([$5],[permit ])) ;;
779 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
780 dnl Idea for future: generate a URL pointing to
781 dnl "onlinedocs/configopts.html#whatever"
788 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
792 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
793 m4_undefine([_g_switch])dnl
794 m4_undefine([_g_help])dnl
799 dnl Check for ISO/IEC 9899:1999 "C99" support.
801 dnl --enable-c99 defines _GLIBCXX_USE_C99
802 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
803 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
804 dnl Where DEFAULT is either `yes' or `no'.
805 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
807 AC_DEFUN([GLIBCXX_ENABLE_C99], [
808 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
810 if test x"$enable_c99" = x"yes"; then
815 # Check for the existence of <math.h> functions used if C99 is enabled.
816 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
817 AC_CACHE_VAL(ac_c99_math, [
818 AC_TRY_COMPILE([#include <math.h>],
826 isgreaterequal(0.0,0.0);
828 islessequal(0.0,0.0);
829 islessgreater(0.0,0.0);
830 islessgreater(0.0,0.0);
831 isunordered(0.0,0.0);
832 ],[ac_c99_math=yes], [ac_c99_math=no])
834 AC_MSG_RESULT($ac_c99_math)
835 if test x"$ac_c99_math" = x"yes"; then
836 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
837 [Define if C99 functions or macros in <math.h> should be imported
838 in <cmath> in namespace std.])
841 # Check for the existence of <complex.h> complex math functions.
842 # This is necessary even though libstdc++ uses the builtin versions
843 # of these functions, because if the builtin cannot be used, a reference
844 # to the library function is emitted.
845 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
847 if test x"$ac_has_complex_h" = x"yes"; then
848 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
849 AC_TRY_COMPILE([#include <complex.h>],
850 [typedef __complex__ float float_type; float_type tmpf;
863 typedef __complex__ double double_type; double_type tmpd;
876 typedef __complex__ long double ld_type; ld_type tmpld;
889 ],[ac_c99_complex=yes], [ac_c99_complex=no])
891 AC_MSG_RESULT($ac_c99_complex)
892 if test x"$ac_c99_complex" = x"yes"; then
893 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
894 [Define if C99 functions in <complex.h> should be used in
895 <complex>. Using compiler builtins for these functions requires
896 corresponding C99 library functions to be present.])
899 # Check for the existence in <stdio.h> of vscanf, et. al.
900 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
901 AC_CACHE_VAL(ac_c99_stdio, [
902 AC_TRY_COMPILE([#include <stdio.h>
904 void foo(char* fmt, ...)
906 va_list args; va_start(args, fmt);
907 vfscanf(stderr, "%i", args);
909 vsnprintf(fmt, 0, "%i", args);
910 vsscanf(fmt, "%i", args);
912 [snprintf("12", 0, "%i");],
913 [ac_c99_stdio=yes], [ac_c99_stdio=no])
915 AC_MSG_RESULT($ac_c99_stdio)
917 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
918 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
919 AC_CACHE_VAL(ac_c99_stdlib, [
920 AC_TRY_COMPILE([#include <stdlib.h>],
923 strtold("gnu", &tmp);
924 strtoll("gnu", &tmp, 10);
925 strtoull("gnu", &tmp, 10);
930 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
932 AC_MSG_RESULT($ac_c99_stdlib)
934 # Check for the existence in <wchar.h> of wcstold, etc.
936 if test x"$ac_has_wchar_h" = xyes &&
937 test x"$ac_has_wctype_h" = xyes; then
938 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
939 AC_TRY_COMPILE([#include <wchar.h>
946 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
948 # Checks for wide character functions that may not be present.
949 # Injection of these is wrapped with guard macros.
950 # NB: only put functions here, instead of immediately above, if
951 # absolutely necessary.
952 AC_TRY_COMPILE([#include <wchar.h>
953 namespace test { using ::vfwscanf; } ], [],
954 [AC_DEFINE(HAVE_VFWSCANF,1,
955 [Defined if vfwscanf exists.])],[])
957 AC_TRY_COMPILE([#include <wchar.h>
958 namespace test { using ::vswscanf; } ], [],
959 [AC_DEFINE(HAVE_VSWSCANF,1,
960 [Defined if vswscanf exists.])],[])
962 AC_TRY_COMPILE([#include <wchar.h>
963 namespace test { using ::vwscanf; } ], [],
964 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
966 AC_TRY_COMPILE([#include <wchar.h>
967 namespace test { using ::wcstof; } ], [],
968 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
970 AC_TRY_COMPILE([#include <wctype.h>],
971 [ wint_t t; int i = iswblank(t);],
972 [AC_DEFINE(HAVE_ISWBLANK,1,
973 [Defined if iswblank exists.])],[])
975 AC_MSG_RESULT($ac_c99_wchar)
978 # Option parsed, now set things appropriately.
979 if test x"$ac_c99_math" = x"no" ||
980 test x"$ac_c99_complex" = x"no" ||
981 test x"$ac_c99_stdio" = x"no" ||
982 test x"$ac_c99_stdlib" = x"no" ||
983 test x"$ac_c99_wchar" = x"no"; then
986 AC_DEFINE(_GLIBCXX_USE_C99, 1,
987 [Define if C99 functions or macros from <wchar.h>, <math.h>,
988 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
994 AC_MSG_CHECKING([for fully enabled ISO C99 support])
995 AC_MSG_RESULT($enable_c99)
1000 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1001 dnl facilities in Chapter 8, "C compatibility".
1003 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1008 # Check for the existence of <complex.h> complex math functions used
1010 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1011 ac_c99_complex_tr1=no;
1012 if test x"$ac_has_complex_h" = x"yes"; then
1013 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1014 AC_TRY_COMPILE([#include <complex.h>],
1015 [typedef __complex__ float float_type; float_type tmpf;
1022 typedef __complex__ double double_type; double_type tmpd;
1029 typedef __complex__ long double ld_type; ld_type tmpld;
1036 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1038 AC_MSG_RESULT($ac_c99_complex_tr1)
1039 if test x"$ac_c99_complex_tr1" = x"yes"; then
1040 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1041 [Define if C99 functions in <complex.h> should be used in
1042 <tr1/complex>. Using compiler builtins for these functions
1043 requires corresponding C99 library functions to be present.])
1046 # Check for the existence of <ctype.h> functions.
1047 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1048 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1049 AC_TRY_COMPILE([#include <ctype.h>],
1053 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1055 AC_MSG_RESULT($ac_c99_ctype_tr1)
1056 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1057 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1058 [Define if C99 functions in <ctype.h> should be imported in
1059 <tr1/cctype> in namespace std::tr1.])
1062 # Check for the existence of <fenv.h> functions.
1063 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1065 if test x"$ac_has_fenv_h" = x"yes"; then
1066 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1067 AC_TRY_COMPILE([#include <fenv.h>],
1072 ret = feclearexcept(except);
1073 ret = fegetexceptflag(pflag, except);
1074 ret = feraiseexcept(except);
1075 ret = fesetexceptflag(pflag, except);
1076 ret = fetestexcept(except);
1078 ret = fesetround(mode);
1079 ret = fegetenv(penv);
1080 ret = feholdexcept(penv);
1081 ret = fesetenv(penv);
1082 ret = feupdateenv(penv);
1083 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1085 AC_MSG_RESULT($ac_c99_fenv_tr1)
1086 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1087 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1088 [Define if C99 functions in <fenv.h> should be imported in
1089 <tr1/cfenv> in namespace std::tr1.])
1092 # Check for the existence of <stdint.h> types.
1093 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1094 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1095 AC_TRY_COMPILE([#include <stdint.h>],
1096 [typedef int8_t my_int8_t;
1097 typedef int16_t my_int16_t;
1098 typedef int32_t my_int32_t;
1099 typedef int64_t my_int64_t;
1100 typedef int_fast8_t my_int_fast8_t;
1101 typedef int_fast16_t my_int_fast16_t;
1102 typedef int_fast32_t my_int_fast32_t;
1103 typedef int_fast64_t my_int_fast64_t;
1104 typedef int_least8_t my_int_least8_t;
1105 typedef int_least16_t my_int_least16_t;
1106 typedef int_least32_t my_int_least32_t;
1107 typedef int_least64_t my_int_least64_t;
1108 typedef intmax_t my_intmax_t;
1109 typedef intptr_t my_intptr_t;
1110 typedef uint8_t my_uint8_t;
1111 typedef uint16_t my_uint16_t;
1112 typedef uint32_t my_uint32_t;
1113 typedef uint64_t my_uint64_t;
1114 typedef uint_fast8_t my_uint_fast8_t;
1115 typedef uint_fast16_t my_uint_fast16_t;
1116 typedef uint_fast32_t my_uint_fast32_t;
1117 typedef uint_fast64_t my_uint_fast64_t;
1118 typedef uint_least8_t my_uint_least8_t;
1119 typedef uint_least16_t my_uint_least16_t;
1120 typedef uint_least32_t my_uint_least32_t;
1121 typedef uint_least64_t my_uint_least64_t;
1122 typedef uintmax_t my_uintmax_t;
1123 typedef uintptr_t my_uintptr_t;
1124 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1126 AC_MSG_RESULT($ac_c99_stdint_tr1)
1127 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1128 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1129 [Define if C99 types in <stdint.h> should be imported in
1130 <tr1/cstdint> in namespace std::tr1.])
1133 # Check for the existence of <math.h> functions.
1134 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1135 AC_CACHE_VAL(ac_c99_math_tr1, [
1136 AC_TRY_COMPILE([#include <math.h>],
1137 [typedef double_t my_double_t;
1138 typedef float_t my_float_t;
1152 copysignf(0.0f, 0.0f);
1153 copysignl(0.0l, 0.0l);
1170 fmaf(0.0f, 0.0f, 0.0f);
1171 fmal(0.0l, 0.0l, 0.0l);
1214 nextafter(0.0, 0.0);
1215 nextafterf(0.0f, 0.0f);
1216 nextafterl(0.0l, 0.0l);
1217 nexttoward(0.0, 0.0);
1218 nexttowardf(0.0f, 0.0f);
1219 nexttowardl(0.0l, 0.0l);
1220 remainder(0.0, 0.0);
1221 remainderf(0.0f, 0.0f);
1222 remainderl(0.0l, 0.0l);
1223 remquo(0.0, 0.0, 0);
1224 remquo(0.0f, 0.0f, 0);
1225 remquo(0.0l, 0.0l, 0);
1244 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1246 AC_MSG_RESULT($ac_c99_math_tr1)
1247 if test x"$ac_c99_math_tr1" = x"yes"; then
1248 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1249 [Define if C99 functions or macros in <math.h> should be imported
1250 in <tr1/cmath> in namespace std::tr1.])
1253 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1254 # sense if the previous check fails, per C99, 7.8/1).
1255 ac_c99_inttypes_tr1=no;
1256 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1257 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1258 AC_TRY_COMPILE([#include <inttypes.h>],
1259 [intmax_t i, numer, denom, base;
1262 intmax_t ret = imaxabs(i);
1263 imaxdiv_t dret = imaxdiv(numer, denom);
1264 ret = strtoimax(s, endptr, base);
1265 uintmax_t uret = strtoumax(s, endptr, base);
1266 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1268 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1269 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1270 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1271 [Define if C99 functions in <inttypes.h> should be imported in
1272 <tr1/cinttypes> in namespace std::tr1.])
1275 # Check for the existence of the <stdbool.h> header.
1276 AC_CHECK_HEADERS(stdbool.h)
1282 dnl Check whether "dev/random" and "dev/urandom" are available for the
1283 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1285 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1287 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1288 AC_CACHE_VAL(ac_random_tr1, [
1289 AC_TRY_RUN([#include <stdio.h>
1292 return !(fopen("/dev/random", "r")
1293 && fopen("/dev/urandom", "r"));
1296 [ac_random_tr1=yes], [ac_random_tr1=no],
1299 AC_MSG_RESULT($ac_random_tr1)
1300 if test x"$ac_random_tr1" = x"yes"; then
1301 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1302 [Define if dev/random and dev/urandom are available for
1303 the random_device of TR1 (Chapter 5.1).])
1309 dnl Check for what type of C headers to use.
1311 dnl --enable-cheaders= [does stuff].
1312 dnl --disable-cheaders [does not do anything, really].
1313 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1314 dnl Where DEFAULT is either `c' or `c_std'.
1316 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1317 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1318 [construct "C" headers for g++], [permit c|c_std])
1319 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1321 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1323 AC_SUBST(C_INCLUDE_DIR)
1324 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1325 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1326 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1331 dnl Check for which locale library to use. The choice is mapped to
1332 dnl a subdirectory of config/locale.
1334 dnl Default is generic.
1336 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1337 AC_MSG_CHECKING([for C locale to use])
1338 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1339 [use MODEL for target locale package],
1340 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1342 # If they didn't use this option switch, or if they specified --enable
1343 # with no specific model, we'll have to look for one. If they
1344 # specified --disable (???), do likewise.
1345 if test $enable_clocale = no || test $enable_clocale = yes; then
1349 # Either a known package, or "auto"
1350 enable_clocale_flag=$enable_clocale
1352 # Probe for locale support if no specific model is specified.
1353 # Default to "generic".
1354 if test $enable_clocale_flag = auto; then
1355 case ${target_os} in
1356 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1357 AC_EGREP_CPP([_GLIBCXX_ok], [
1358 #include <features.h>
1359 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1362 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1364 # Test for bugs early in glibc-2.2.x series
1365 if test $enable_clocale_flag = gnu; then
1367 #define _GNU_SOURCE 1
1370 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1371 extern __typeof(newlocale) __newlocale;
1372 extern __typeof(duplocale) __duplocale;
1373 extern __typeof(strcoll_l) __strcoll_l;
1377 const char __one[] = "Äuglein Augmen";
1378 const char __two[] = "Äuglein";
1383 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1384 loc_dup = __duplocale(loc);
1385 i = __strcoll_l(__one, __two, loc);
1386 j = __strcoll_l(__one, __two, loc_dup);
1390 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1391 [enable_clocale_flag=generic])
1394 # ... at some point put __strxfrm_l tests in as well.
1397 enable_clocale_flag=darwin
1400 enable_clocale_flag=generic
1405 # Deal with gettext issues. Default to not using it (=no) until we detect
1406 # support for it later. Let the user turn it off via --e/d, but let that
1407 # default to on for easier handling.
1410 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1414 # Set configure bits for specified locale package
1415 case ${enable_clocale_flag} in
1417 AC_MSG_RESULT(generic)
1419 CLOCALE_H=config/locale/generic/c_locale.h
1420 CLOCALE_CC=config/locale/generic/c_locale.cc
1421 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1422 CCOLLATE_CC=config/locale/generic/collate_members.cc
1423 CCTYPE_CC=config/locale/generic/ctype_members.cc
1424 CMESSAGES_H=config/locale/generic/messages_members.h
1425 CMESSAGES_CC=config/locale/generic/messages_members.cc
1426 CMONEY_CC=config/locale/generic/monetary_members.cc
1427 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1428 CTIME_H=config/locale/generic/time_members.h
1429 CTIME_CC=config/locale/generic/time_members.cc
1430 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1433 AC_MSG_RESULT(darwin or freebsd)
1435 CLOCALE_H=config/locale/generic/c_locale.h
1436 CLOCALE_CC=config/locale/generic/c_locale.cc
1437 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1438 CCOLLATE_CC=config/locale/generic/collate_members.cc
1439 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1440 CMESSAGES_H=config/locale/generic/messages_members.h
1441 CMESSAGES_CC=config/locale/generic/messages_members.cc
1442 CMONEY_CC=config/locale/generic/monetary_members.cc
1443 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1444 CTIME_H=config/locale/generic/time_members.h
1445 CTIME_CC=config/locale/generic/time_members.cc
1446 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1452 # Declare intention to use gettext, and add support for specific
1454 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1457 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1458 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1459 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1462 # Export the build objects.
1463 for ling in $ALL_LINGUAS; do \
1464 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1465 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1467 AC_SUBST(glibcxx_MOFILES)
1468 AC_SUBST(glibcxx_POFILES)
1470 CLOCALE_H=config/locale/gnu/c_locale.h
1471 CLOCALE_CC=config/locale/gnu/c_locale.cc
1472 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1473 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1474 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1475 CMESSAGES_H=config/locale/gnu/messages_members.h
1476 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1477 CMONEY_CC=config/locale/gnu/monetary_members.cc
1478 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1479 CTIME_H=config/locale/gnu/time_members.h
1480 CTIME_CC=config/locale/gnu/time_members.cc
1481 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1484 AC_MSG_RESULT(IEEE 1003.1)
1486 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1487 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1488 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1489 CCOLLATE_CC=config/locale/generic/collate_members.cc
1490 CCTYPE_CC=config/locale/generic/ctype_members.cc
1491 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1492 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1493 CMONEY_CC=config/locale/generic/monetary_members.cc
1494 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1495 CTIME_H=config/locale/generic/time_members.h
1496 CTIME_CC=config/locale/generic/time_members.cc
1497 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1501 # This is where the testsuite looks for locale catalogs, using the
1502 # -DLOCALEDIR define during testsuite compilation.
1503 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1504 AC_SUBST(glibcxx_localedir)
1506 # A standalone libintl (e.g., GNU libintl) may be in use.
1507 if test $USE_NLS = yes; then
1508 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1509 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1511 if test $USE_NLS = yes; then
1512 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1513 [Define if NLS translations are to be used.])
1518 AC_SUBST(CMESSAGES_H)
1519 AC_SUBST(CCODECVT_CC)
1520 AC_SUBST(CCOLLATE_CC)
1522 AC_SUBST(CMESSAGES_CC)
1524 AC_SUBST(CNUMERIC_CC)
1527 AC_SUBST(CLOCALE_CC)
1528 AC_SUBST(CLOCALE_INTERNAL_H)
1533 dnl Check for which std::allocator base class to use. The choice is
1534 dnl mapped from a subdirectory of include/ext.
1538 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1539 AC_MSG_CHECKING([for std::allocator base class])
1540 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1541 [use KIND for target std::allocator base],
1542 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1544 # If they didn't use this option switch, or if they specified --enable
1545 # with no specific model, we'll have to look for one. If they
1546 # specified --disable (???), do likewise.
1547 if test $enable_libstdcxx_allocator = no ||
1548 test $enable_libstdcxx_allocator = yes;
1550 enable_libstdcxx_allocator=auto
1553 # Either a known package, or "auto". Auto implies the default choice
1554 # for a particular platform.
1555 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1557 # Probe for host-specific support if no specific model is specified.
1559 if test $enable_libstdcxx_allocator_flag = auto; then
1560 case ${target_os} in
1561 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1562 enable_libstdcxx_allocator_flag=new
1565 enable_libstdcxx_allocator_flag=new
1569 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1572 # Set configure bits for specified locale package
1573 case ${enable_libstdcxx_allocator_flag} in
1575 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1576 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1579 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1580 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1583 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1584 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1587 ALLOCATOR_H=config/allocator/new_allocator_base.h
1588 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1591 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1592 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1596 AC_SUBST(ALLOCATOR_H)
1597 AC_SUBST(ALLOCATOR_NAME)
1602 dnl Check for whether the Boost-derived checks should be turned on.
1604 dnl --enable-concept-checks turns them on.
1605 dnl --disable-concept-checks leaves them off.
1606 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1607 dnl Where DEFAULT is either `yes' or `no'.
1609 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1610 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1611 if test $enable_concept_checks = yes; then
1612 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1613 [Define to use concept checking code from the boost libraries.])
1619 dnl Check for which I/O library to use: stdio, or something specific.
1621 dnl Default is stdio.
1623 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1624 AC_MSG_CHECKING([for underlying I/O to use])
1625 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1626 [use target-specific I/O package], [permit stdio])
1628 # Now that libio has been removed, you can have any color you want as long
1629 # as it's black. This is one big no-op until other packages are added, but
1630 # showing the framework never hurts.
1631 case ${enable_cstdio} in
1633 CSTDIO_H=config/io/c_io_stdio.h
1634 BASIC_FILE_H=config/io/basic_file_stdio.h
1635 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1636 AC_MSG_RESULT(stdio)
1641 AC_SUBST(BASIC_FILE_H)
1642 AC_SUBST(BASIC_FILE_CC)
1647 dnl Check for "unusual" flags to pass to the compiler while building.
1649 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1650 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1651 dnl --disable-cxx-flags passes nothing.
1652 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1653 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1654 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1655 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1656 dnl If "default flags" is an empty string, the effect is the same
1657 dnl as --disable or --enable=no.
1659 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1660 AC_MSG_CHECKING([for extra compiler flags for building])
1661 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1662 [pass compiler FLAGS when building library],
1663 [case "x$enable_cxx_flags" in
1664 xno | x) enable_cxx_flags= ;;
1666 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1669 # Run through flags (either default or command-line) and set anything
1670 # extra (e.g., #defines) that must accompany particular g++ options.
1671 if test -n "$enable_cxx_flags"; then
1672 for f in $enable_cxx_flags; do
1676 *) # and we're trying to pass /what/ exactly?
1677 AC_MSG_ERROR([compiler flags start with a -]) ;;
1682 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1683 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1684 AC_SUBST(EXTRA_CXX_FLAGS)
1689 dnl Check to see if debugging libraries are to be built.
1691 dnl --enable-libstdcxx-debug
1692 dnl builds a separate set of debugging libraries in addition to the
1693 dnl normal (shared, static) libstdc++ binaries.
1695 dnl --disable-libstdcxx-debug
1696 dnl builds only one (non-debug) version of libstdc++.
1698 dnl --enable-libstdcxx-debug-flags=FLAGS
1699 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1701 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1702 dnl Where DEFAULT is either `yes' or `no'.
1704 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1705 AC_MSG_CHECKING([for additional debug build])
1706 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1707 AC_MSG_RESULT($enable_libstdcxx_debug)
1708 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1713 dnl Check for explicit debug flags.
1715 dnl --enable-libstdcxx-debug-flags='-O1'
1716 dnl is a general method for passing flags to be used when
1717 dnl building debug libraries with --enable-debug.
1719 dnl --disable-libstdcxx-debug-flags does nothing.
1720 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1721 dnl If "default flags" is an empty string, the effect is the same
1722 dnl as --disable or --enable=no.
1724 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1725 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1726 [pass compiler FLAGS when building debug library],
1727 [case "x$enable_libstdcxx_debug_flags" in
1728 xno | x) enable_libstdcxx_debug_flags= ;;
1730 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1733 # Option parsed, now set things appropriately
1734 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1735 AC_SUBST(DEBUG_FLAGS)
1737 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1742 dnl Check if the user only wants a freestanding library implementation.
1744 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1745 dnl installing only the headers required by [17.4.1.3] and the language
1746 dnl support library. More than that will be built (to keep the Makefiles
1747 dnl conveniently clean), but not installed.
1750 dnl is_hosted (yes/no)
1753 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1755 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1756 AC_ARG_ENABLE([hosted-libstdcxx],
1757 AC_HELP_STRING([--disable-hosted-libstdcxx],
1758 [only build freestanding C++ runtime support]),,
1761 enable_hosted_libstdcxx=no
1764 enable_hosted_libstdcxx=yes
1767 if test "$enable_hosted_libstdcxx" = no; then
1768 AC_MSG_NOTICE([Only freestanding libraries will be built])
1772 enable_libstdcxx_pch=no
1777 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1778 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1779 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1784 dnl Check for template specializations for the 'long long' type.
1785 dnl The result determines only whether 'long long' I/O is enabled; things
1786 dnl like numeric_limits<> specializations are always available.
1788 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1789 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1790 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1791 dnl Where DEFAULT is either `yes' or `no'.
1793 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1794 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1795 if test $enable_long_long = yes; then
1796 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1797 [Define if code specialized for long long should be used.])
1799 AC_MSG_CHECKING([for enabled long long specializations])
1800 AC_MSG_RESULT([$enable_long_long])
1805 dnl Check for template specializations for the 'wchar_t' type.
1807 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1808 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1809 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1810 dnl Where DEFAULT is either `yes' or `no'.
1812 dnl Necessary support must also be present.
1814 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1815 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1817 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1818 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1819 AC_MSG_CHECKING([for mbstate_t])
1820 AC_TRY_COMPILE([#include <wchar.h>],
1821 [mbstate_t teststate;],
1822 have_mbstate_t=yes, have_mbstate_t=no)
1823 AC_MSG_RESULT($have_mbstate_t)
1824 if test x"$have_mbstate_t" = xyes; then
1825 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1828 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1830 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1832 if test x"$enable_wchar_t" = x"yes"; then
1837 if test x"$ac_has_wchar_h" = xyes &&
1838 test x"$ac_has_wctype_h" = xyes; then
1839 AC_TRY_COMPILE([#include <wchar.h>
1900 ],[],[], [enable_wchar_t=no])
1908 if test x"$enable_wchar_t" = x"yes"; then
1909 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1910 [Define if code specialized for wchar_t should be used.])
1913 AC_MSG_CHECKING([for enabled wchar_t specializations])
1914 AC_MSG_RESULT([$enable_wchar_t])
1919 dnl Check to see if building and using a C++ precompiled header can be done.
1921 dnl --enable-libstdcxx-pch=yes
1922 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1923 dnl may work, after some light-hearted attempts to puzzle out compiler
1924 dnl support, flip bits on in include/Makefile.am
1926 dnl --disable-libstdcxx-pch
1927 dnl turns off attempts to use or build stdc++.h.gch.
1930 dnl glibcxx_PCHFLAGS
1932 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1933 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1934 if test $enable_libstdcxx_pch = yes; then
1935 AC_CACHE_CHECK([for compiler with PCH support],
1936 [glibcxx_cv_prog_CXX_pch],
1937 [ac_save_CXXFLAGS="$CXXFLAGS"
1938 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1941 echo '#include <math.h>' > conftest.h
1942 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1943 -o conftest.h.gch 1>&5 2>&1 &&
1944 echo '#error "pch failed"' > conftest.h &&
1945 echo '#include "conftest.h"' > conftest.cc &&
1946 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1948 glibcxx_cv_prog_CXX_pch=yes
1950 glibcxx_cv_prog_CXX_pch=no
1953 CXXFLAGS=$ac_save_CXXFLAGS
1956 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1959 AC_MSG_CHECKING([for enabled PCH])
1960 AC_MSG_RESULT([$enable_libstdcxx_pch])
1962 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1963 if test $enable_libstdcxx_pch = yes; then
1964 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
1968 AC_SUBST(glibcxx_PCHFLAGS)
1973 dnl Check for atomic builtins.
1975 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
1977 dnl This checks to see if the host supports the compiler-generated
1978 dnl builtins for atomic operations. Note, this is intended to be an
1979 dnl all-or-nothing switch, so all the atomic operations that are used
1980 dnl should be checked.
1983 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
1984 dnl see: CHECK_SYNC_FETCH_AND_ADD
1987 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
1989 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
1990 AC_MSG_CHECKING([for atomic builtins])
1994 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1995 cat > conftest.$ac_ext << EOF
1996 [#]line __oline__ "configure"
1999 // NB: _Atomic_word not necessarily int.
2000 typedef int atomic_type;
2003 const atomic_type c3(0);
2004 if (__sync_fetch_and_add(&c1, c2) == c3)
2011 old_CXXFLAGS="$CXXFLAGS"
2013 if AC_TRY_EVAL(ac_compile); then
2014 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2015 enable_atomic_builtins=no
2017 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2018 [Define if builtin atomic operations are supported on this host.])
2019 enable_atomic_builtins=yes
2020 atomicity_dir=cpu/generic/atomicity_builtins
2023 CXXFLAGS="$old_CXXFLAGS"
2026 # Now, if still generic, set to mutex.
2027 if test $atomicity_dir = "cpu/generic" ; then
2028 atomicity_dir=cpu/generic/atomicity_mutex
2031 AC_MSG_RESULT($enable_atomic_builtins)
2036 dnl Check for exception handling support. If an explicit enable/disable
2037 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2038 dnl target may or may not support call frame exceptions.
2040 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2041 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2042 dnl Neither one forces an attempt at detection.
2045 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2047 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2048 AC_MSG_CHECKING([for exception model to use])
2051 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2052 [force use of builtin_setjmp for exceptions],
2053 [permit yes|no|auto])
2055 if test $enable_sjlj_exceptions = auto; then
2056 # Botheration. Now we've got to detect the exception model. Link tests
2057 # against libgcc.a are problematic since we've not been given proper -L
2058 # bits for single-tree newlib and libgloss.
2060 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2061 cat > conftest.$ac_ext << EOF
2062 [#]line __oline__ "configure"
2071 old_CXXFLAGS="$CXXFLAGS"
2073 if AC_TRY_EVAL(ac_compile); then
2074 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2075 enable_sjlj_exceptions=yes
2076 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2077 enable_sjlj_exceptions=no
2078 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2079 enable_sjlj_exceptions=no
2082 CXXFLAGS="$old_CXXFLAGS"
2086 # This is a tad weird, for hysterical raisins. We have to map
2087 # enable/disable to two different models.
2088 case $enable_sjlj_exceptions in
2090 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2091 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2092 ac_exception_model_name=sjlj
2095 ac_exception_model_name="call frame"
2098 AC_MSG_ERROR([unable to detect exception model])
2102 AC_MSG_RESULT($ac_exception_model_name)
2107 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2109 dnl --enable-visibility enables attempt to use visibility attributes.
2110 dnl --disable-visibility turns off all use of visibility attributes.
2111 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2112 dnl Where DEFAULT is 'yes'.
2114 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2115 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2117 if test x$enable_visibility = xyes ; then
2118 dnl all hail libgfortran
2119 dnl Check whether the target supports hidden visibility.
2120 AC_CACHE_CHECK([whether the target supports hidden visibility],
2121 have_attribute_visibility, [
2122 save_CFLAGS="$CFLAGS"
2123 CFLAGS="$CFLAGS -Werror"
2124 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2125 [], have_attribute_visibility=yes,
2126 have_attribute_visibility=no)
2127 CFLAGS="$save_CFLAGS"])
2128 if test $have_attribute_visibility = no; then
2129 enable_visibility=no
2133 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2134 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2139 dnl Add version tags to symbols in shared library (or not), additionally
2140 dnl marking other symbols as private/local (or not).
2142 dnl --enable-symvers=style adds a version script to the linker call when
2143 dnl creating the shared library. The choice of version script is
2144 dnl controlled by 'style'.
2145 dnl --disable-symvers does not.
2146 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2147 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2148 dnl choose a default style based on linker characteristics. Passing
2149 dnl 'no' disables versioning.
2151 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2153 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2154 [enables symbol versioning of the shared library],
2155 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2157 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2158 # don't know enough about $LD to do tricks...
2159 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2161 # Turn a 'yes' into a suitable default.
2162 if test x$enable_symvers = xyes ; then
2163 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2166 if test $with_gnu_ld = yes ; then
2169 case ${target_os} in
2171 enable_symvers=darwin ;;
2173 enable_symvers=no ;;
2179 # Check to see if 'darwin' or 'darwin-export' can win.
2180 if test x$enable_symvers = xdarwin-export ; then
2181 enable_symvers=darwin
2184 # Check to see if 'gnu' can win.
2185 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2186 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2187 AC_MSG_CHECKING([for shared libgcc])
2188 ac_save_CFLAGS="$CFLAGS"
2190 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2191 CFLAGS="$ac_save_CFLAGS"
2192 if test $glibcxx_shared_libgcc = no; then
2193 cat > conftest.c <<EOF
2194 int main (void) { return 0; }
2197 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2198 -shared -shared-libgcc -o conftest.so \
2199 conftest.c -v 2>&1 >/dev/null \
2200 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2202 rm -f conftest.c conftest.so
2203 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2204 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2205 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2206 CFLAGS="$ac_save_CFLAGS"
2209 AC_MSG_RESULT($glibcxx_shared_libgcc)
2211 # For GNU ld, we need at least this version. The format is described in
2212 # GLIBCXX_CHECK_LINKER_FEATURES above.
2213 glibcxx_min_gnu_ld_version=21400
2215 # If no shared libgcc, can't win.
2216 if test $glibcxx_shared_libgcc != yes; then
2217 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2218 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2219 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2221 elif test $with_gnu_ld != yes ; then
2223 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2224 AC_MSG_WARN([=== you are not using the GNU linker.])
2225 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2227 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2228 # The right tools, the right setup, but too old. Fallbacks?
2229 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2230 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2231 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2232 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2233 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2238 # Everything parsed; figure out what file to use.
2239 case $enable_symvers in
2241 SYMVER_FILE=config/abi/pre/none.ver
2244 SYMVER_FILE=config/abi/pre/gnu.ver
2245 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2246 [Define to use GNU versioning in the shared library.])
2248 gnu-versioned-namespace)
2249 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2250 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2251 [Define to use GNU namespace versioning in the shared library.])
2254 SYMVER_FILE=config/abi/pre/gnu.ver
2255 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2256 [Define to use darwin versioning in the shared library.])
2260 if test x$enable_symvers != xno ; then
2261 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2262 [Define to use symbol versioning in the shared library.])
2265 AC_SUBST(SYMVER_FILE)
2266 AC_SUBST(port_specific_symbol_files)
2267 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2268 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2269 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2270 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2271 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2273 # Now, set up compatibility support, if any.
2274 # In addition, need this to deal with std::size_t mangling in
2275 # src/compatibility.cc. In a perfect world, could use
2276 # typeid(std::size_t).name()[0] to do direct substitution.
2277 AC_MSG_CHECKING([for size_t as unsigned int])
2278 ac_save_CFLAGS="$CFLAGS"
2280 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2281 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2282 CFLAGS=$ac_save_CFLAGS
2283 if test "$glibcxx_size_t_is_i" = yes; then
2284 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2286 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2288 AC_MSG_CHECKING([for ptrdiff_t as int])
2289 ac_save_CFLAGS="$CFLAGS"
2291 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2292 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2293 CFLAGS=$ac_save_CFLAGS
2294 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2295 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2297 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2302 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2303 dnl We must stage the required headers so that they will be installed
2304 dnl with the library (unlike libgcc, the STL implementation is provided
2305 dnl solely within headers). Since we must not inject random user-space
2306 dnl macro names into user-provided C++ code, we first stage into <file>-in
2307 dnl and process to <file> with an output command. The reason for a two-
2308 dnl stage process here is to correctly handle $srcdir!=$objdir without
2309 dnl having to write complex code (the sed commands to clean the macro
2310 dnl namespace are complex and fragile enough as it is). We must also
2311 dnl add a relative path so that -I- is supported properly.
2314 dnl glibcxx_thread_h
2317 dnl HAVE_GTHR_DEFAULT
2319 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2320 AC_MSG_CHECKING([for thread model used by GCC])
2321 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2322 AC_MSG_RESULT([$target_thread_file])
2324 if test $target_thread_file != single; then
2325 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2326 [Define if gthr-default.h exists
2327 (meaning that threading support is enabled).])
2330 glibcxx_thread_h=gthr-$target_thread_file.h
2332 dnl Check for __GTHREADS define.
2333 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2334 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2340 AC_SUBST(glibcxx_thread_h)
2344 # Check whether LC_MESSAGES is available in <locale.h>.
2345 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2347 # This file file be copied and used freely without restrictions. It can
2348 # be used in projects which are not available under the GNU Public License
2349 # but which still want to provide support for the GNU gettext functionality.
2350 # Please note that the actual code is *not* freely available.
2353 AC_DEFUN([AC_LC_MESSAGES], [
2354 AC_CHECK_HEADER(locale.h, [
2355 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2356 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2357 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2358 if test $ac_cv_val_LC_MESSAGES = yes; then
2359 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2360 [Define if LC_MESSAGES is available in <locale.h>.])
2365 # Macros from the top-level gcc directory.
2366 m4_include([../config/tls.m4])