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 AC_MSG_CHECKING([for ld version])
236 ldver=`$LD --version 2>/dev/null | head -1 | \
237 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
239 glibcxx_gnu_ld_version=`echo $ldver | \
240 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
241 AC_MSG_RESULT($glibcxx_gnu_ld_version)
244 glibcxx_gcsections_min_ld=21602
245 if test x"$with_gnu_ld" = x"yes" &&
246 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
248 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
249 # NB: This flag only works reliably after 2.16.1. Configure tests
250 # for this are difficult, so hard wire a value that should work.
252 # All these tests are for C++, but run with the "C" compiler driver.
253 # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
254 ac_test_CFLAGS="${CFLAGS+set}"
255 ac_save_CFLAGS="$CFLAGS"
256 CFLAGS='-x c++ -Wl,--gc-sections'
258 # Check for -Wl,--gc-sections
259 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
260 AC_TRY_LINK([ int one(void) { return 1; }
261 int two(void) { return 2; }
262 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
263 if test "$ac_gcsections" = "yes"; then
266 if $CC -c conftest.c; then
267 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
268 grep "Warning: gc-sections option ignored" > /dev/null; then
272 rm -f conftest.c conftest.o conftest
274 if test "$ac_gcsections" = "yes"; then
275 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
277 AC_MSG_RESULT($ac_gcsections)
279 if test "$ac_test_CFLAGS" = set; then
280 CFLAGS="$ac_save_CFLAGS"
282 # this is the suspicious part
288 # Note this is only for shared objects.
290 if test x"$with_gnu_ld" = x"yes"; then
291 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
292 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
293 if test -n "$cxx_z_relo"; then
294 OPT_LDFLAGS="-Wl,-z,relro"
297 AC_MSG_RESULT($ac_ld_relro)
300 # Set linker optimization flags.
301 if test x"$with_gnu_ld" = x"yes"; then
302 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
305 AC_SUBST(SECTION_LDFLAGS)
306 AC_SUBST(OPT_LDFLAGS)
311 dnl Check to see if this target can enable the iconv specializations.
312 dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
313 dnl (This must have been previously checked, along with the rest of C99
314 dnl support.) By default, iconv support is disabled.
317 dnl _GLIBCXX_USE_ICONV if all the bits are found.
319 dnl LIBICONV to a -l string containing the iconv library, if needed.
321 AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
324 # Only continue checking if the ISO C99 headers exist and support is on.
325 if test x"$enable_wchar_t" = xyes; then
327 # Use iconv for wchar_t to char conversions. As such, check for
328 # X/Open Portability Guide, version 2 features (XPG2).
329 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
330 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
332 # Check for existence of libiconv.a providing XPG2 wchar_t support.
333 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
335 LIBS="$LIBS $LIBICONV"
338 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
339 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
343 if test x"$ac_has_iconv_h" = xyes &&
344 test x"$ac_has_langinfo_h" = xyes &&
345 test x"$ac_XPG2funcs" = xyes;
347 AC_DEFINE([_GLIBCXX_USE_ICONV],1,
348 [Define if iconv and related functions exist and are usable.])
352 AC_MSG_CHECKING([for enabled iconv specializations])
353 AC_MSG_RESULT($enable_iconv)
358 dnl Check for headers for, and arguments to, the setrlimit() function.
359 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
362 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
363 dnl various HAVE_LIMIT_* for individual limit names
365 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
366 AC_MSG_CHECKING([for RLIMIT_$1])
369 #include <sys/time.h>
370 #include <sys/resource.h>
372 [ int f = RLIMIT_$1 ; ],
373 [glibcxx_mresult=1], [glibcxx_mresult=0])
374 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
375 [Only used in build directory testsuite_hooks.h.])
376 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
380 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
381 setrlimit_have_headers=yes
382 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
384 [setrlimit_have_headers=no])
385 # If don't have the headers, then we can't run the tests now, and we
386 # won't be seeing any of these during testsuite compilation.
387 if test $setrlimit_have_headers = yes; then
388 # Can't do these in a loop, else the resulting syntax is wrong.
389 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
390 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
391 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
392 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
393 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
395 # Check for rlimit, setrlimit.
396 AC_CACHE_VAL(ac_setrlimit, [
399 #include <sys/time.h>
400 #include <sys/resource.h>
404 [ac_setrlimit=yes], [ac_setrlimit=no])
408 AC_MSG_CHECKING([for testsuite resource limits support])
409 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
411 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
412 [Define if using setrlimit to set resource limits during
417 AC_MSG_RESULT($ac_res_limits)
422 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
423 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
425 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
426 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
427 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
429 [#include <sys/stat.h>],
432 S_ISREG(buffer.st_mode);],
433 [glibcxx_cv_S_ISREG=yes],
434 [glibcxx_cv_S_ISREG=no])
436 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
438 [#include <sys/stat.h>],
441 S_IFREG & buffer.st_mode;],
442 [glibcxx_cv_S_IFREG=yes],
443 [glibcxx_cv_S_IFREG=no])
446 if test $glibcxx_cv_S_ISREG = yes; then
447 AC_DEFINE(HAVE_S_ISREG, 1,
448 [Define if S_IFREG is available in <sys/stat.h>.])
450 elif test $glibcxx_cv_S_IFREG = yes; then
451 AC_DEFINE(HAVE_S_IFREG, 1,
452 [Define if S_IFREG is available in <sys/stat.h>.])
460 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
462 AC_DEFUN([GLIBCXX_CHECK_POLL], [
463 AC_MSG_CHECKING([for poll])
464 AC_CACHE_VAL(glibcxx_cv_POLL, [
467 [struct pollfd pfd[1];
468 pfd[0].events = POLLIN;
470 [glibcxx_cv_POLL=yes],
471 [glibcxx_cv_POLL=no])
473 if test $glibcxx_cv_POLL = yes; then
474 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
476 AC_MSG_RESULT($glibcxx_cv_POLL)
481 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
483 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
484 AC_MSG_CHECKING([for writev])
485 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
487 [#include <sys/uio.h>],
488 [struct iovec iov[2];
490 [glibcxx_cv_WRITEV=yes],
491 [glibcxx_cv_WRITEV=no])
493 if test $glibcxx_cv_WRITEV = yes; then
494 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
496 AC_MSG_RESULT($glibcxx_cv_WRITEV)
501 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
503 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
504 AC_MSG_CHECKING([for int64_t])
505 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
507 [#include <stdint.h>],
509 [glibcxx_cv_INT64_T=yes],
510 [glibcxx_cv_INT64_T=no])
512 if test $glibcxx_cv_INT64_T = yes; then
513 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
515 AC_MSG_RESULT($glibcxx_cv_INT64_T)
520 dnl Check whether LFS support is available.
522 AC_DEFUN([GLIBCXX_CHECK_LFS], [
525 ac_save_CXXFLAGS="$CXXFLAGS"
526 CXXFLAGS="$CXXFLAGS -fno-exceptions"
527 AC_MSG_CHECKING([for LFS support])
528 AC_CACHE_VAL(glibcxx_cv_LFS, [
532 #include <sys/stat.h>
536 fseeko64(fp, 0, SEEK_CUR);
538 lseek64(1, 0, SEEK_CUR);
541 [glibcxx_cv_LFS=yes],
544 if test $glibcxx_cv_LFS = yes; then
545 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
547 AC_MSG_RESULT($glibcxx_cv_LFS)
548 CXXFLAGS="$ac_save_CXXFLAGS"
554 dnl Check for whether a fully dynamic basic_string implementation should
555 dnl be turned on, that does not put empty objects in per-process static
556 dnl memory (mostly useful together with shared memory allocators, see PR
557 dnl libstdc++/16612 for details).
559 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
560 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
561 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
562 dnl Where DEFAULT is either `yes' or `no'.
564 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
565 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
566 if test $enable_fully_dynamic_string = yes; then
567 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
568 [Define if a fully dynamic basic_string is wanted.])
574 dnl Does any necessary configuration of the testsuite directory. Generates
575 dnl the testsuite_hooks.h header.
577 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
581 dnl GLIBCXX_TEST_WCHAR_T
582 dnl GLIBCXX_TEST_THREAD
586 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
587 if $GLIBCXX_IS_NATIVE ; then
588 # Do checks for resource limit functions.
589 GLIBCXX_CHECK_SETRLIMIT
591 # Look for setenv, so that extended locale tests can be performed.
592 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
595 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
596 test $enable_symvers != no; then
599 enable_abi_check=no ;;
601 enable_abi_check=yes ;;
604 # Only build this as native, since automake does not understand
609 # Export file names for ABI checking.
610 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
611 AC_SUBST(baseline_dir)
616 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
620 dnl TOPLEVEL_INCLUDES
622 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
623 # Used for every C++ compile we perform.
625 -I$glibcxx_builddir/include/$host_alias \
626 -I$glibcxx_builddir/include \
627 -I$glibcxx_srcdir/libsupc++"
629 # For Canadian crosses, pick this up too.
630 if test $CANADIAN = yes; then
631 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
634 # Stuff in the actual top level. Currently only used by libsupc++ to
635 # get unwind* headers from the gcc dir.
636 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
637 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
639 # Now, export this to all the little Makefiles....
640 AC_SUBST(GLIBCXX_INCLUDES)
641 AC_SUBST(TOPLEVEL_INCLUDES)
646 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
647 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
650 dnl OPTIMIZE_CXXFLAGS
653 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
654 # Optimization flags that are probably a good idea for thrill-seekers. Just
655 # uncomment the lines below and make, everything else is ready to go...
656 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
658 AC_SUBST(OPTIMIZE_CXXFLAGS)
660 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
666 dnl All installation directory information is determined here.
670 dnl glibcxx_prefixdir
671 dnl glibcxx_toolexecdir
672 dnl glibcxx_toolexeclibdir
674 dnl Assumes cross_compiling bits already done, and with_cross_host in
677 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
678 glibcxx_toolexecdir=no
679 glibcxx_toolexeclibdir=no
680 glibcxx_prefixdir=$prefix
682 AC_MSG_CHECKING([for gxx-include-dir])
683 AC_ARG_WITH([gxx-include-dir],
684 AC_HELP_STRING([--with-gxx-include-dir=DIR],
685 [installation directory for include files]),
687 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
688 no) gxx_include_dir=no ;;
689 *) gxx_include_dir=$withval ;;
691 [gxx_include_dir=no])
692 AC_MSG_RESULT($gxx_include_dir)
694 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
695 AC_ARG_ENABLE([version-specific-runtime-libs],
696 AC_HELP_STRING([--enable-version-specific-runtime-libs],
697 [Specify that runtime libraries should be installed in a compiler-specific directory]),
698 [case "$enableval" in
699 yes) version_specific_libs=yes ;;
700 no) version_specific_libs=no ;;
701 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
703 [version_specific_libs=no])
704 AC_MSG_RESULT($version_specific_libs)
706 # Default case for install directory for include files.
707 if test $version_specific_libs = no && test $gxx_include_dir = no; then
708 gxx_include_dir='${prefix}/include/c++/${gcc_version}'
711 # Version-specific runtime libs processing.
712 if test $version_specific_libs = yes; then
713 # Need the gcc compiler version to know where to install libraries
714 # and header files if --enable-version-specific-runtime-libs option
715 # is selected. FIXME: these variables are misnamed, there are
716 # no executables installed in _toolexecdir or _toolexeclibdir.
717 if test x"$gxx_include_dir" = x"no"; then
718 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
720 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
721 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
724 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
725 # Install a library built with a cross compiler in tooldir, not libdir.
726 if test x"$glibcxx_toolexecdir" = x"no"; then
727 if test -n "$with_cross_host" &&
728 test x"$with_cross_host" != x"no"; then
729 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
730 glibcxx_toolexeclibdir='${toolexecdir}/lib'
732 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
733 glibcxx_toolexeclibdir='${libdir}'
735 multi_os_directory=`$CXX -print-multi-os-directory`
736 case $multi_os_directory in
737 .) ;; # Avoid trailing /.
738 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
742 AC_MSG_CHECKING([for install location])
743 AC_MSG_RESULT($gxx_include_dir)
745 AC_SUBST(glibcxx_prefixdir)
746 AC_SUBST(gxx_include_dir)
747 AC_SUBST(glibcxx_toolexecdir)
748 AC_SUBST(glibcxx_toolexeclibdir)
754 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
755 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
756 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
758 dnl See docs/html/17_intro/configury.html#enable for documentation.
760 m4_define([GLIBCXX_ENABLE],[dnl
761 m4_define([_g_switch],[--enable-$1])dnl
762 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
763 AC_ARG_ENABLE($1,_g_help,
768 m4_bpatsubst([$5],[permit ])) ;;
769 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
770 dnl Idea for future: generate a URL pointing to
771 dnl "onlinedocs/configopts.html#whatever"
778 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
782 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
783 m4_undefine([_g_switch])dnl
784 m4_undefine([_g_help])dnl
789 dnl Check for ISO/IEC 9899:1999 "C99" support.
791 dnl --enable-c99 defines _GLIBCXX_USE_C99
792 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
793 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
794 dnl Where DEFAULT is either `yes' or `no'.
795 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
797 AC_DEFUN([GLIBCXX_ENABLE_C99], [
798 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
800 if test x"$enable_c99" = x"yes"; then
805 # Check for the existence of <math.h> functions used if C99 is enabled.
806 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
807 AC_CACHE_VAL(ac_c99_math, [
808 AC_TRY_COMPILE([#include <math.h>],
816 isgreaterequal(0.0,0.0);
818 islessequal(0.0,0.0);
819 islessgreater(0.0,0.0);
820 islessgreater(0.0,0.0);
821 isunordered(0.0,0.0);
822 ],[ac_c99_math=yes], [ac_c99_math=no])
824 AC_MSG_RESULT($ac_c99_math)
825 if test x"$ac_c99_math" = x"yes"; then
826 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
827 [Define if C99 functions or macros in <math.h> should be imported
828 in <cmath> in namespace std.])
831 # Check for the existence of <complex.h> complex math functions.
832 # This is necessary even though libstdc++ uses the builtin versions
833 # of these functions, because if the builtin cannot be used, a reference
834 # to the library function is emitted.
835 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
837 if test x"$ac_has_complex_h" = x"yes"; then
838 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
839 AC_TRY_COMPILE([#include <complex.h>],
840 [typedef __complex__ float float_type; float_type tmpf;
853 typedef __complex__ double double_type; double_type tmpd;
866 typedef __complex__ long double ld_type; ld_type tmpld;
879 ],[ac_c99_complex=yes], [ac_c99_complex=no])
881 AC_MSG_RESULT($ac_c99_complex)
882 if test x"$ac_c99_complex" = x"yes"; then
883 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
884 [Define if C99 functions in <complex.h> should be used in
885 <complex>. Using compiler builtins for these functions requires
886 corresponding C99 library functions to be present.])
889 # Check for the existence in <stdio.h> of vscanf, et. al.
890 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
891 AC_CACHE_VAL(ac_c99_stdio, [
892 AC_TRY_COMPILE([#include <stdio.h>
894 void foo(char* fmt, ...)
896 va_list args; va_start(args, fmt);
897 vfscanf(stderr, "%i", args);
899 vsnprintf(fmt, 0, "%i", args);
900 vsscanf(fmt, "%i", args);
902 [snprintf("12", 0, "%i");],
903 [ac_c99_stdio=yes], [ac_c99_stdio=no])
905 AC_MSG_RESULT($ac_c99_stdio)
907 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
908 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
909 AC_CACHE_VAL(ac_c99_stdlib, [
910 AC_TRY_COMPILE([#include <stdlib.h>],
913 strtold("gnu", &tmp);
914 strtoll("gnu", &tmp, 10);
915 strtoull("gnu", &tmp, 10);
920 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
922 AC_MSG_RESULT($ac_c99_stdlib)
924 # Check for the existence in <wchar.h> of wcstold, etc.
926 if test x"$ac_has_wchar_h" = xyes &&
927 test x"$ac_has_wctype_h" = xyes; then
928 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
929 AC_TRY_COMPILE([#include <wchar.h>
936 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
938 # Checks for wide character functions that may not be present.
939 # Injection of these is wrapped with guard macros.
940 # NB: only put functions here, instead of immediately above, if
941 # absolutely necessary.
942 AC_TRY_COMPILE([#include <wchar.h>
943 namespace test { using ::vfwscanf; } ], [],
944 [AC_DEFINE(HAVE_VFWSCANF,1,
945 [Defined if vfwscanf exists.])],[])
947 AC_TRY_COMPILE([#include <wchar.h>
948 namespace test { using ::vswscanf; } ], [],
949 [AC_DEFINE(HAVE_VSWSCANF,1,
950 [Defined if vswscanf exists.])],[])
952 AC_TRY_COMPILE([#include <wchar.h>
953 namespace test { using ::vwscanf; } ], [],
954 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
956 AC_TRY_COMPILE([#include <wchar.h>
957 namespace test { using ::wcstof; } ], [],
958 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
960 AC_TRY_COMPILE([#include <wctype.h>],
961 [ wint_t t; int i = iswblank(t);],
962 [AC_DEFINE(HAVE_ISWBLANK,1,
963 [Defined if iswblank exists.])],[])
965 AC_MSG_RESULT($ac_c99_wchar)
968 # Option parsed, now set things appropriately.
969 if test x"$ac_c99_math" = x"no" ||
970 test x"$ac_c99_complex" = x"no" ||
971 test x"$ac_c99_stdio" = x"no" ||
972 test x"$ac_c99_stdlib" = x"no" ||
973 test x"$ac_c99_wchar" = x"no"; then
976 AC_DEFINE(_GLIBCXX_USE_C99, 1,
977 [Define if C99 functions or macros from <wchar.h>, <math.h>,
978 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
984 AC_MSG_CHECKING([for fully enabled ISO C99 support])
985 AC_MSG_RESULT($enable_c99)
990 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
991 dnl facilities in Chapter 8, "C compatibility".
993 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
998 # Check for the existence of <complex.h> complex math functions used
1000 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1001 ac_c99_complex_tr1=no;
1002 if test x"$ac_has_complex_h" = x"yes"; then
1003 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1004 AC_TRY_COMPILE([#include <complex.h>],
1005 [typedef __complex__ float float_type; float_type tmpf;
1012 typedef __complex__ double double_type; double_type tmpd;
1019 typedef __complex__ long double ld_type; ld_type tmpld;
1026 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1028 AC_MSG_RESULT($ac_c99_complex_tr1)
1029 if test x"$ac_c99_complex_tr1" = x"yes"; then
1030 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1031 [Define if C99 functions in <complex.h> should be used in
1032 <tr1/complex>. Using compiler builtins for these functions
1033 requires corresponding C99 library functions to be present.])
1036 # Check for the existence of <ctype.h> functions.
1037 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1038 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1039 AC_TRY_COMPILE([#include <ctype.h>],
1043 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1045 AC_MSG_RESULT($ac_c99_ctype_tr1)
1046 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1047 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1048 [Define if C99 functions in <ctype.h> should be imported in
1049 <tr1/cctype> in namespace std::tr1.])
1052 # Check for the existence of <fenv.h> functions.
1053 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1055 if test x"$ac_has_fenv_h" = x"yes"; then
1056 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1057 AC_TRY_COMPILE([#include <fenv.h>],
1062 ret = feclearexcept(except);
1063 ret = fegetexceptflag(pflag, except);
1064 ret = feraiseexcept(except);
1065 ret = fesetexceptflag(pflag, except);
1066 ret = fetestexcept(except);
1068 ret = fesetround(mode);
1069 ret = fegetenv(penv);
1070 ret = feholdexcept(penv);
1071 ret = fesetenv(penv);
1072 ret = feupdateenv(penv);
1073 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1075 AC_MSG_RESULT($ac_c99_fenv_tr1)
1076 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1077 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1078 [Define if C99 functions in <fenv.h> should be imported in
1079 <tr1/cfenv> in namespace std::tr1.])
1082 # Check for the existence of <stdint.h> types.
1083 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1084 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1085 AC_TRY_COMPILE([#include <stdint.h>],
1086 [typedef int8_t my_int8_t;
1087 typedef int16_t my_int16_t;
1088 typedef int32_t my_int32_t;
1089 typedef int64_t my_int64_t;
1090 typedef int_fast8_t my_int_fast8_t;
1091 typedef int_fast16_t my_int_fast16_t;
1092 typedef int_fast32_t my_int_fast32_t;
1093 typedef int_fast64_t my_int_fast64_t;
1094 typedef int_least8_t my_int_least8_t;
1095 typedef int_least16_t my_int_least16_t;
1096 typedef int_least32_t my_int_least32_t;
1097 typedef int_least64_t my_int_least64_t;
1098 typedef intmax_t my_intmax_t;
1099 typedef intptr_t my_intptr_t;
1100 typedef uint8_t my_uint8_t;
1101 typedef uint16_t my_uint16_t;
1102 typedef uint32_t my_uint32_t;
1103 typedef uint64_t my_uint64_t;
1104 typedef uint_fast8_t my_uint_fast8_t;
1105 typedef uint_fast16_t my_uint_fast16_t;
1106 typedef uint_fast32_t my_uint_fast32_t;
1107 typedef uint_fast64_t my_uint_fast64_t;
1108 typedef uint_least8_t my_uint_least8_t;
1109 typedef uint_least16_t my_uint_least16_t;
1110 typedef uint_least32_t my_uint_least32_t;
1111 typedef uint_least64_t my_uint_least64_t;
1112 typedef uintmax_t my_uintmax_t;
1113 typedef uintptr_t my_uintptr_t;
1114 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1116 AC_MSG_RESULT($ac_c99_stdint_tr1)
1117 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1118 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1119 [Define if C99 types in <stdint.h> should be imported in
1120 <tr1/cstdint> in namespace std::tr1.])
1123 # Check for the existence of <math.h> functions.
1124 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1125 AC_CACHE_VAL(ac_c99_math_tr1, [
1126 AC_TRY_COMPILE([#include <math.h>],
1127 [typedef double_t my_double_t;
1128 typedef float_t my_float_t;
1142 copysignf(0.0f, 0.0f);
1143 copysignl(0.0l, 0.0l);
1160 fmaf(0.0f, 0.0f, 0.0f);
1161 fmal(0.0l, 0.0l, 0.0l);
1204 nextafter(0.0, 0.0);
1205 nextafterf(0.0f, 0.0f);
1206 nextafterl(0.0l, 0.0l);
1207 nexttoward(0.0, 0.0);
1208 nexttowardf(0.0f, 0.0f);
1209 nexttowardl(0.0l, 0.0l);
1210 remainder(0.0, 0.0);
1211 remainderf(0.0f, 0.0f);
1212 remainderl(0.0l, 0.0l);
1213 remquo(0.0, 0.0, 0);
1214 remquo(0.0f, 0.0f, 0);
1215 remquo(0.0l, 0.0l, 0);
1234 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1236 AC_MSG_RESULT($ac_c99_math_tr1)
1237 if test x"$ac_c99_math_tr1" = x"yes"; then
1238 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1239 [Define if C99 functions or macros in <math.h> should be imported
1240 in <tr1/cmath> in namespace std::tr1.])
1243 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1244 # sense if the previous check fails, per C99, 7.8/1).
1245 ac_c99_inttypes_tr1=no;
1246 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1247 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1248 AC_TRY_COMPILE([#include <inttypes.h>],
1249 [intmax_t i, numer, denom, base;
1252 intmax_t ret = imaxabs(i);
1253 imaxdiv_t dret = imaxdiv(numer, denom);
1254 ret = strtoimax(s, endptr, base);
1255 uintmax_t uret = strtoumax(s, endptr, base);
1256 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1258 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1259 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1260 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1261 [Define if C99 functions in <inttypes.h> should be imported in
1262 <tr1/cinttypes> in namespace std::tr1.])
1265 # Check for the existence of the <stdbool.h> header.
1266 AC_CHECK_HEADERS(stdbool.h)
1272 dnl Check whether "dev/random" and "dev/urandom" are available for the
1273 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1275 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1277 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1278 AC_CACHE_VAL(ac_random_tr1, [
1279 AC_TRY_RUN([#include <stdio.h>
1282 return !(fopen("/dev/random", "r")
1283 && fopen("/dev/urandom", "r"));
1286 [ac_random_tr1=yes], [ac_random_tr1=no],
1289 AC_MSG_RESULT($ac_random_tr1)
1290 if test x"$ac_random_tr1" = x"yes"; then
1291 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1292 [Define if dev/random and dev/urandom are available for
1293 the random_device of TR1 (Chapter 5.1).])
1299 dnl Check for what type of C headers to use.
1301 dnl --enable-cheaders= [does stuff].
1302 dnl --disable-cheaders [does not do anything, really].
1303 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1304 dnl Where DEFAULT is either `c' or `c_std'.
1306 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1307 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1308 [construct "C" headers for g++], [permit c|c_std])
1309 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1311 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1313 AC_SUBST(C_INCLUDE_DIR)
1314 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1315 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1316 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1321 dnl Check for which locale library to use. The choice is mapped to
1322 dnl a subdirectory of config/locale.
1324 dnl Default is generic.
1326 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1327 AC_MSG_CHECKING([for C locale to use])
1328 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1329 [use MODEL for target locale package],
1330 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1332 # If they didn't use this option switch, or if they specified --enable
1333 # with no specific model, we'll have to look for one. If they
1334 # specified --disable (???), do likewise.
1335 if test $enable_clocale = no || test $enable_clocale = yes; then
1339 # Either a known package, or "auto"
1340 enable_clocale_flag=$enable_clocale
1342 # Probe for locale support if no specific model is specified.
1343 # Default to "generic".
1344 if test $enable_clocale_flag = auto; then
1345 case ${target_os} in
1346 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1347 AC_EGREP_CPP([_GLIBCXX_ok], [
1348 #include <features.h>
1349 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1352 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1354 # Test for bugs early in glibc-2.2.x series
1355 if test $enable_clocale_flag = gnu; then
1357 #define _GNU_SOURCE 1
1360 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1361 extern __typeof(newlocale) __newlocale;
1362 extern __typeof(duplocale) __duplocale;
1363 extern __typeof(strcoll_l) __strcoll_l;
1367 const char __one[] = "Äuglein Augmen";
1368 const char __two[] = "Äuglein";
1373 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1374 loc_dup = __duplocale(loc);
1375 i = __strcoll_l(__one, __two, loc);
1376 j = __strcoll_l(__one, __two, loc_dup);
1380 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1381 [enable_clocale_flag=generic])
1384 # ... at some point put __strxfrm_l tests in as well.
1387 enable_clocale_flag=darwin
1390 enable_clocale_flag=generic
1395 # Deal with gettext issues. Default to not using it (=no) until we detect
1396 # support for it later. Let the user turn it off via --e/d, but let that
1397 # default to on for easier handling.
1400 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1404 # Set configure bits for specified locale package
1405 case ${enable_clocale_flag} in
1407 AC_MSG_RESULT(generic)
1409 CLOCALE_H=config/locale/generic/c_locale.h
1410 CLOCALE_CC=config/locale/generic/c_locale.cc
1411 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1412 CCOLLATE_CC=config/locale/generic/collate_members.cc
1413 CCTYPE_CC=config/locale/generic/ctype_members.cc
1414 CMESSAGES_H=config/locale/generic/messages_members.h
1415 CMESSAGES_CC=config/locale/generic/messages_members.cc
1416 CMONEY_CC=config/locale/generic/monetary_members.cc
1417 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1418 CTIME_H=config/locale/generic/time_members.h
1419 CTIME_CC=config/locale/generic/time_members.cc
1420 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1423 AC_MSG_RESULT(darwin or freebsd)
1425 CLOCALE_H=config/locale/generic/c_locale.h
1426 CLOCALE_CC=config/locale/generic/c_locale.cc
1427 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1428 CCOLLATE_CC=config/locale/generic/collate_members.cc
1429 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1430 CMESSAGES_H=config/locale/generic/messages_members.h
1431 CMESSAGES_CC=config/locale/generic/messages_members.cc
1432 CMONEY_CC=config/locale/generic/monetary_members.cc
1433 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1434 CTIME_H=config/locale/generic/time_members.h
1435 CTIME_CC=config/locale/generic/time_members.cc
1436 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1442 # Declare intention to use gettext, and add support for specific
1444 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1447 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1448 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1449 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1452 # Export the build objects.
1453 for ling in $ALL_LINGUAS; do \
1454 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1455 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1457 AC_SUBST(glibcxx_MOFILES)
1458 AC_SUBST(glibcxx_POFILES)
1460 CLOCALE_H=config/locale/gnu/c_locale.h
1461 CLOCALE_CC=config/locale/gnu/c_locale.cc
1462 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1463 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1464 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1465 CMESSAGES_H=config/locale/gnu/messages_members.h
1466 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1467 CMONEY_CC=config/locale/gnu/monetary_members.cc
1468 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1469 CTIME_H=config/locale/gnu/time_members.h
1470 CTIME_CC=config/locale/gnu/time_members.cc
1471 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1474 AC_MSG_RESULT(IEEE 1003.1)
1476 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1477 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1478 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1479 CCOLLATE_CC=config/locale/generic/collate_members.cc
1480 CCTYPE_CC=config/locale/generic/ctype_members.cc
1481 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1482 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1483 CMONEY_CC=config/locale/generic/monetary_members.cc
1484 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1485 CTIME_H=config/locale/generic/time_members.h
1486 CTIME_CC=config/locale/generic/time_members.cc
1487 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1491 # This is where the testsuite looks for locale catalogs, using the
1492 # -DLOCALEDIR define during testsuite compilation.
1493 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1494 AC_SUBST(glibcxx_localedir)
1496 # A standalone libintl (e.g., GNU libintl) may be in use.
1497 if test $USE_NLS = yes; then
1498 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1499 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1501 if test $USE_NLS = yes; then
1502 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1503 [Define if NLS translations are to be used.])
1508 AC_SUBST(CMESSAGES_H)
1509 AC_SUBST(CCODECVT_CC)
1510 AC_SUBST(CCOLLATE_CC)
1512 AC_SUBST(CMESSAGES_CC)
1514 AC_SUBST(CNUMERIC_CC)
1517 AC_SUBST(CLOCALE_CC)
1518 AC_SUBST(CLOCALE_INTERNAL_H)
1523 dnl Check for which std::allocator base class to use. The choice is
1524 dnl mapped from a subdirectory of include/ext.
1528 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1529 AC_MSG_CHECKING([for std::allocator base class])
1530 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1531 [use KIND for target std::allocator base],
1532 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1534 # If they didn't use this option switch, or if they specified --enable
1535 # with no specific model, we'll have to look for one. If they
1536 # specified --disable (???), do likewise.
1537 if test $enable_libstdcxx_allocator = no ||
1538 test $enable_libstdcxx_allocator = yes;
1540 enable_libstdcxx_allocator=auto
1543 # Either a known package, or "auto". Auto implies the default choice
1544 # for a particular platform.
1545 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1547 # Probe for host-specific support if no specific model is specified.
1549 if test $enable_libstdcxx_allocator_flag = auto; then
1550 case ${target_os} in
1551 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1552 enable_libstdcxx_allocator_flag=new
1555 enable_libstdcxx_allocator_flag=new
1559 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1562 # Set configure bits for specified locale package
1563 case ${enable_libstdcxx_allocator_flag} in
1565 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1566 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1569 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1570 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1573 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1574 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1577 ALLOCATOR_H=config/allocator/new_allocator_base.h
1578 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1581 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1582 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1586 AC_SUBST(ALLOCATOR_H)
1587 AC_SUBST(ALLOCATOR_NAME)
1592 dnl Check for whether the Boost-derived checks should be turned on.
1594 dnl --enable-concept-checks turns them on.
1595 dnl --disable-concept-checks leaves them off.
1596 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1597 dnl Where DEFAULT is either `yes' or `no'.
1599 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1600 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1601 if test $enable_concept_checks = yes; then
1602 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1603 [Define to use concept checking code from the boost libraries.])
1609 dnl Check for which I/O library to use: stdio, or something specific.
1611 dnl Default is stdio.
1613 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1614 AC_MSG_CHECKING([for underlying I/O to use])
1615 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1616 [use target-specific I/O package], [permit stdio])
1618 # Now that libio has been removed, you can have any color you want as long
1619 # as it's black. This is one big no-op until other packages are added, but
1620 # showing the framework never hurts.
1621 case ${enable_cstdio} in
1623 CSTDIO_H=config/io/c_io_stdio.h
1624 BASIC_FILE_H=config/io/basic_file_stdio.h
1625 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1626 AC_MSG_RESULT(stdio)
1631 AC_SUBST(BASIC_FILE_H)
1632 AC_SUBST(BASIC_FILE_CC)
1637 dnl Check for "unusual" flags to pass to the compiler while building.
1639 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1640 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1641 dnl --disable-cxx-flags passes nothing.
1642 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1643 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1644 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1645 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1646 dnl If "default flags" is an empty string, the effect is the same
1647 dnl as --disable or --enable=no.
1649 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1650 AC_MSG_CHECKING([for extra compiler flags for building])
1651 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1652 [pass compiler FLAGS when building library],
1653 [case "x$enable_cxx_flags" in
1654 xno | x) enable_cxx_flags= ;;
1656 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1659 # Run through flags (either default or command-line) and set anything
1660 # extra (e.g., #defines) that must accompany particular g++ options.
1661 if test -n "$enable_cxx_flags"; then
1662 for f in $enable_cxx_flags; do
1666 *) # and we're trying to pass /what/ exactly?
1667 AC_MSG_ERROR([compiler flags start with a -]) ;;
1672 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1673 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1674 AC_SUBST(EXTRA_CXX_FLAGS)
1679 dnl Check to see if debugging libraries are to be built.
1681 dnl --enable-libstdcxx-debug
1682 dnl builds a separate set of debugging libraries in addition to the
1683 dnl normal (shared, static) libstdc++ binaries.
1685 dnl --disable-libstdcxx-debug
1686 dnl builds only one (non-debug) version of libstdc++.
1688 dnl --enable-libstdcxx-debug-flags=FLAGS
1689 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1691 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1692 dnl Where DEFAULT is either `yes' or `no'.
1694 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1695 AC_MSG_CHECKING([for additional debug build])
1696 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1697 AC_MSG_RESULT($enable_libstdcxx_debug)
1698 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1703 dnl Check for explicit debug flags.
1705 dnl --enable-libstdcxx-debug-flags='-O1'
1706 dnl is a general method for passing flags to be used when
1707 dnl building debug libraries with --enable-debug.
1709 dnl --disable-libstdcxx-debug-flags does nothing.
1710 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1711 dnl If "default flags" is an empty string, the effect is the same
1712 dnl as --disable or --enable=no.
1714 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1715 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1716 [pass compiler FLAGS when building debug library],
1717 [case "x$enable_libstdcxx_debug_flags" in
1718 xno | x) enable_libstdcxx_debug_flags= ;;
1720 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1723 # Option parsed, now set things appropriately
1724 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1725 AC_SUBST(DEBUG_FLAGS)
1727 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1732 dnl Check if the user only wants a freestanding library implementation.
1734 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1735 dnl installing only the headers required by [17.4.1.3] and the language
1736 dnl support library. More than that will be built (to keep the Makefiles
1737 dnl conveniently clean), but not installed.
1740 dnl is_hosted (yes/no)
1743 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1745 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1746 AC_ARG_ENABLE([hosted-libstdcxx],
1747 AC_HELP_STRING([--disable-hosted-libstdcxx],
1748 [only build freestanding C++ runtime support]),,
1751 enable_hosted_libstdcxx=no
1754 enable_hosted_libstdcxx=yes
1757 if test "$enable_hosted_libstdcxx" = no; then
1758 AC_MSG_NOTICE([Only freestanding libraries will be built])
1762 enable_libstdcxx_pch=no
1767 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1768 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1769 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1774 dnl Check for template specializations for the 'long long' type.
1775 dnl The result determines only whether 'long long' I/O is enabled; things
1776 dnl like numeric_limits<> specializations are always available.
1778 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1779 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1780 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1781 dnl Where DEFAULT is either `yes' or `no'.
1783 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1784 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1785 if test $enable_long_long = yes; then
1786 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1787 [Define if code specialized for long long should be used.])
1789 AC_MSG_CHECKING([for enabled long long specializations])
1790 AC_MSG_RESULT([$enable_long_long])
1795 dnl Check for template specializations for the 'wchar_t' type.
1797 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1798 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1799 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1800 dnl Where DEFAULT is either `yes' or `no'.
1802 dnl Necessary support must also be present.
1804 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1805 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1807 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1808 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1809 AC_MSG_CHECKING([for mbstate_t])
1810 AC_TRY_COMPILE([#include <wchar.h>],
1811 [mbstate_t teststate;],
1812 have_mbstate_t=yes, have_mbstate_t=no)
1813 AC_MSG_RESULT($have_mbstate_t)
1814 if test x"$have_mbstate_t" = xyes; then
1815 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1818 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1820 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1822 if test x"$enable_wchar_t" = x"yes"; then
1827 if test x"$ac_has_wchar_h" = xyes &&
1828 test x"$ac_has_wctype_h" = xyes; then
1829 AC_TRY_COMPILE([#include <wchar.h>
1890 ],[],[], [enable_wchar_t=no])
1898 if test x"$enable_wchar_t" = x"yes"; then
1899 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1900 [Define if code specialized for wchar_t should be used.])
1903 AC_MSG_CHECKING([for enabled wchar_t specializations])
1904 AC_MSG_RESULT([$enable_wchar_t])
1909 dnl Check to see if building and using a C++ precompiled header can be done.
1911 dnl --enable-libstdcxx-pch=yes
1912 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1913 dnl may work, after some light-hearted attempts to puzzle out compiler
1914 dnl support, flip bits on in include/Makefile.am
1916 dnl --disable-libstdcxx-pch
1917 dnl turns off attempts to use or build stdc++.h.gch.
1920 dnl glibcxx_PCHFLAGS
1922 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1923 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1924 if test $enable_libstdcxx_pch = yes; then
1925 AC_CACHE_CHECK([for compiler with PCH support],
1926 [glibcxx_cv_prog_CXX_pch],
1927 [ac_save_CXXFLAGS="$CXXFLAGS"
1928 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1931 echo '#include <math.h>' > conftest.h
1932 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1933 -o conftest.h.gch 1>&5 2>&1 &&
1934 echo '#error "pch failed"' > conftest.h &&
1935 echo '#include "conftest.h"' > conftest.cc &&
1936 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1938 glibcxx_cv_prog_CXX_pch=yes
1940 glibcxx_cv_prog_CXX_pch=no
1943 CXXFLAGS=$ac_save_CXXFLAGS
1946 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1949 AC_MSG_CHECKING([for enabled PCH])
1950 AC_MSG_RESULT([$enable_libstdcxx_pch])
1952 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1953 if test $enable_libstdcxx_pch = yes; then
1954 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1958 AC_SUBST(glibcxx_PCHFLAGS)
1963 dnl Check for exception handling support. If an explicit enable/disable
1964 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1965 dnl target may or may not support call frame exceptions.
1967 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1968 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1969 dnl Neither one forces an attempt at detection.
1972 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1974 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1975 AC_MSG_CHECKING([for exception model to use])
1978 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1979 [force use of builtin_setjmp for exceptions],
1980 [permit yes|no|auto])
1982 if test $enable_sjlj_exceptions = auto; then
1983 # Botheration. Now we've got to detect the exception model. Link tests
1984 # against libgcc.a are problematic since we've not been given proper -L
1985 # bits for single-tree newlib and libgloss.
1987 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1988 cat > conftest.$ac_ext << EOF
1989 [#]line __oline__ "configure"
1998 old_CXXFLAGS="$CXXFLAGS"
2000 if AC_TRY_EVAL(ac_compile); then
2001 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2002 enable_sjlj_exceptions=yes
2003 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2004 enable_sjlj_exceptions=no
2005 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2006 enable_sjlj_exceptions=no
2009 CXXFLAGS="$old_CXXFLAGS"
2013 # This is a tad weird, for hysterical raisins. We have to map
2014 # enable/disable to two different models.
2015 case $enable_sjlj_exceptions in
2017 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2018 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2019 ac_exception_model_name=sjlj
2022 ac_exception_model_name="call frame"
2025 AC_MSG_ERROR([unable to detect exception model])
2029 AC_MSG_RESULT($ac_exception_model_name)
2034 dnl Add version tags to symbols in shared library (or not), additionally
2035 dnl marking other symbols as private/local (or not).
2037 dnl --enable-symvers=style adds a version script to the linker call when
2038 dnl creating the shared library. The choice of version script is
2039 dnl controlled by 'style'.
2040 dnl --disable-symvers does not.
2041 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2042 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2043 dnl choose a default style based on linker characteristics. Passing
2044 dnl 'no' disables versioning.
2046 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2048 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2049 [enables symbol versioning of the shared library],
2050 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2052 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2053 # don't know enough about $LD to do tricks...
2054 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2056 # Turn a 'yes' into a suitable default.
2057 if test x$enable_symvers = xyes ; then
2058 if test $enable_shared = no || test "x$LD" = x ; then
2061 if test $with_gnu_ld = yes ; then
2064 case ${target_os} in
2066 enable_symvers=darwin ;;
2068 enable_symvers=no ;;
2074 # Check to see if 'darwin' or 'darwin-export' can win.
2075 if test x$enable_symvers = xdarwin-export ; then
2076 enable_symvers=darwin
2079 # Check to see if 'gnu' can win.
2080 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2081 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2082 AC_MSG_CHECKING([for shared libgcc])
2083 ac_save_CFLAGS="$CFLAGS"
2085 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2086 CFLAGS="$ac_save_CFLAGS"
2087 if test $glibcxx_shared_libgcc = no; then
2088 cat > conftest.c <<EOF
2089 int main (void) { return 0; }
2092 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2093 -shared -shared-libgcc -o conftest.so \
2094 conftest.c -v 2>&1 >/dev/null \
2095 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2097 rm -f conftest.c conftest.so
2098 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2099 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2100 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2101 CFLAGS="$ac_save_CFLAGS"
2104 AC_MSG_RESULT($glibcxx_shared_libgcc)
2106 # For GNU ld, we need at least this version. The format is described in
2107 # GLIBCXX_CHECK_LINKER_FEATURES above.
2108 glibcxx_min_gnu_ld_version=21400
2110 # If no shared libgcc, can't win.
2111 if test $glibcxx_shared_libgcc != yes; then
2112 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2113 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2114 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2116 elif test $with_gnu_ld != yes ; then
2118 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2119 AC_MSG_WARN([=== you are not using the GNU linker.])
2120 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2122 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2123 # The right tools, the right setup, but too old. Fallbacks?
2124 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2125 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2126 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2127 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2128 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2133 # Everything parsed; figure out what file to use.
2134 case $enable_symvers in
2136 SYMVER_FILE=config/abi/pre/none.ver
2139 SYMVER_FILE=config/abi/pre/gnu.ver
2140 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2141 [Define to use GNU versioning in the shared library.])
2143 gnu-versioned-namespace)
2144 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2145 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2146 [Define to use GNU namespace versioning in the shared library.])
2149 SYMVER_FILE=config/abi/pre/gnu.ver
2150 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2151 [Define to use darwin versioning in the shared library.])
2155 if test x$enable_symvers != xno ; then
2156 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2157 [Define to use symbol versioning in the shared library.])
2160 AC_SUBST(SYMVER_FILE)
2161 AC_SUBST(port_specific_symbol_files)
2162 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2163 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2164 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2165 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2166 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2168 # Now, set up compatibility support, if any.
2169 # In addition, need this to deal with std::size_t mangling in
2170 # src/compatibility.cc. In a perfect world, could use
2171 # typeid(std::size_t).name()[0] to do direct substitution.
2172 AC_MSG_CHECKING([for size_t as unsigned int])
2173 ac_save_CFLAGS="$CFLAGS"
2175 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2176 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2177 CFLAGS=$ac_save_CFLAGS
2178 if test "$glibcxx_size_t_is_i" = yes; then
2179 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2181 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2183 AC_MSG_CHECKING([for ptrdiff_t as int])
2184 ac_save_CFLAGS="$CFLAGS"
2186 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2187 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2188 CFLAGS=$ac_save_CFLAGS
2189 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2190 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2192 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2197 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2198 dnl We must stage the required headers so that they will be installed
2199 dnl with the library (unlike libgcc, the STL implementation is provided
2200 dnl solely within headers). Since we must not inject random user-space
2201 dnl macro names into user-provided C++ code, we first stage into <file>-in
2202 dnl and process to <file> with an output command. The reason for a two-
2203 dnl stage process here is to correctly handle $srcdir!=$objdir without
2204 dnl having to write complex code (the sed commands to clean the macro
2205 dnl namespace are complex and fragile enough as it is). We must also
2206 dnl add a relative path so that -I- is supported properly.
2209 dnl glibcxx_thread_h
2212 dnl HAVE_GTHR_DEFAULT
2214 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2215 AC_MSG_CHECKING([for thread model used by GCC])
2216 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2217 AC_MSG_RESULT([$target_thread_file])
2219 if test $target_thread_file != single; then
2220 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2221 [Define if gthr-default.h exists
2222 (meaning that threading support is enabled).])
2225 glibcxx_thread_h=gthr-$target_thread_file.h
2227 dnl Check for __GTHREADS define.
2228 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2229 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2235 AC_SUBST(glibcxx_thread_h)
2239 # Check whether LC_MESSAGES is available in <locale.h>.
2240 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2242 # This file file be copied and used freely without restrictions. It can
2243 # be used in projects which are not available under the GNU Public License
2244 # but which still want to provide support for the GNU gettext functionality.
2245 # Please note that the actual code is *not* freely available.
2248 AC_DEFUN([AC_LC_MESSAGES], [
2249 AC_CHECK_HEADER(locale.h, [
2250 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2251 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2252 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2253 if test $ac_cv_val_LC_MESSAGES = yes; then
2254 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2255 [Define if LC_MESSAGES is available in <locale.h>.])
2260 # Macros from the top-level gcc directory.
2261 m4_include([../config/tls.m4])