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,$1,,[turns on ISO/IEC 9899:1999 support])
800 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos
801 # even if C99 support is turned off.
802 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
803 AC_MSG_CHECKING([for mbstate_t])
804 AC_TRY_COMPILE([#include <wchar.h>],
805 [mbstate_t teststate;],
806 have_mbstate_t=yes, have_mbstate_t=no)
807 AC_MSG_RESULT($have_mbstate_t)
808 if test x"$have_mbstate_t" = xyes; then
809 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
812 if test x"$enable_c99" = x"yes"; then
817 # Check for the existence of <math.h> functions used if C99 is enabled.
818 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
819 AC_CACHE_VAL(ac_c99_math, [
820 AC_TRY_COMPILE([#include <math.h>],
828 isgreaterequal(0.0,0.0);
830 islessequal(0.0,0.0);
831 islessgreater(0.0,0.0);
832 islessgreater(0.0,0.0);
833 isunordered(0.0,0.0);
834 ],[ac_c99_math=yes], [ac_c99_math=no])
836 AC_MSG_RESULT($ac_c99_math)
837 if test x"$ac_c99_math" = x"yes"; then
838 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
839 [Define if C99 functions or macros in <math.h> should be imported
840 in <cmath> in namespace std.])
843 # Check for the existence of <complex.h> complex math functions.
844 # This is necessary even though libstdc++ uses the builtin versions
845 # of these functions, because if the builtin cannot be used, a reference
846 # to the library function is emitted.
847 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
849 if test x"$ac_has_complex_h" = x"yes"; then
850 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
851 AC_TRY_COMPILE([#include <complex.h>],
852 [typedef __complex__ float float_type; float_type tmpf;
865 typedef __complex__ double double_type; double_type tmpd;
878 typedef __complex__ long double ld_type; ld_type tmpld;
891 ],[ac_c99_complex=yes], [ac_c99_complex=no])
893 AC_MSG_RESULT($ac_c99_complex)
894 if test x"$ac_c99_complex" = x"yes"; then
895 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
896 [Define if C99 functions in <complex.h> should be used in
897 <complex>. Using compiler builtins for these functions requires
898 corresponding C99 library functions to be present.])
901 # Check for the existence in <stdio.h> of vscanf, et. al.
902 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
903 AC_CACHE_VAL(ac_c99_stdio, [
904 AC_TRY_COMPILE([#include <stdio.h>
906 void foo(char* fmt, ...)
908 va_list args; va_start(args, fmt);
909 vfscanf(stderr, "%i", args);
911 vsnprintf(fmt, 0, "%i", args);
912 vsscanf(fmt, "%i", args);
914 [snprintf("12", 0, "%i");],
915 [ac_c99_stdio=yes], [ac_c99_stdio=no])
917 AC_MSG_RESULT($ac_c99_stdio)
919 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
920 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
921 AC_CACHE_VAL(ac_c99_stdlib, [
922 AC_TRY_COMPILE([#include <stdlib.h>],
925 strtold("gnu", &tmp);
926 strtoll("gnu", &tmp, 10);
927 strtoull("gnu", &tmp, 10);
932 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
934 AC_MSG_RESULT($ac_c99_stdlib)
936 # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
937 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
939 if test x"$ac_has_wchar_h" = xyes &&
940 test x"$ac_has_wctype_h" = xyes; then
941 AC_TRY_COMPILE([#include <wchar.h>
1005 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
1007 # Checks for wide character functions that may not be present.
1008 # Injection of these is wrapped with guard macros.
1009 # NB: only put functions here, instead of immediately above, if
1010 # absolutely necessary.
1011 AC_TRY_COMPILE([#include <wchar.h>
1012 namespace test { using ::vfwscanf; } ], [],
1013 [AC_DEFINE(HAVE_VFWSCANF,1,
1014 [Defined if vfwscanf exists.])],[])
1016 AC_TRY_COMPILE([#include <wchar.h>
1017 namespace test { using ::vswscanf; } ], [],
1018 [AC_DEFINE(HAVE_VSWSCANF,1,
1019 [Defined if vswscanf exists.])],[])
1021 AC_TRY_COMPILE([#include <wchar.h>
1022 namespace test { using ::vwscanf; } ], [],
1023 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1025 AC_TRY_COMPILE([#include <wchar.h>
1026 namespace test { using ::wcstof; } ], [],
1027 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1029 AC_TRY_COMPILE([#include <wctype.h>],
1030 [ wint_t t; int i = iswblank(t);],
1031 [AC_DEFINE(HAVE_ISWBLANK,1,
1032 [Defined if iswblank exists.])],[])
1034 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1035 AC_MSG_RESULT($ac_c99_wchar)
1038 # Option parsed, now set things appropriately.
1039 if test x"$ac_c99_math" = x"no" ||
1040 test x"$ac_c99_complex" = x"no" ||
1041 test x"$ac_c99_stdio" = x"no" ||
1042 test x"$ac_c99_stdlib" = x"no" ||
1043 test x"$ac_c99_wchar" = x"no"; then
1046 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1047 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1048 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1054 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1055 AC_MSG_RESULT($enable_c99)
1060 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1061 dnl facilities in Chapter 8, "C compatibility".
1063 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1068 # Check for the existence of <complex.h> complex math functions used
1070 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1071 ac_c99_complex_tr1=no;
1072 if test x"$ac_has_complex_h" = x"yes"; then
1073 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1074 AC_TRY_COMPILE([#include <complex.h>],
1075 [typedef __complex__ float float_type; float_type tmpf;
1082 typedef __complex__ double double_type; double_type tmpd;
1089 typedef __complex__ long double ld_type; ld_type tmpld;
1096 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1098 AC_MSG_RESULT($ac_c99_complex_tr1)
1099 if test x"$ac_c99_complex_tr1" = x"yes"; then
1100 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1101 [Define if C99 functions in <complex.h> should be used in
1102 <tr1/complex>. Using compiler builtins for these functions
1103 requires corresponding C99 library functions to be present.])
1106 # Check for the existence of <ctype.h> functions.
1107 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1108 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1109 AC_TRY_COMPILE([#include <ctype.h>],
1113 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1115 AC_MSG_RESULT($ac_c99_ctype_tr1)
1116 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1117 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1118 [Define if C99 functions in <ctype.h> should be imported in
1119 <tr1/cctype> in namespace std::tr1.])
1122 # Check for the existence of <fenv.h> functions.
1123 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1125 if test x"$ac_has_fenv_h" = x"yes"; then
1126 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1127 AC_TRY_COMPILE([#include <fenv.h>],
1132 ret = feclearexcept(except);
1133 ret = fegetexceptflag(pflag, except);
1134 ret = feraiseexcept(except);
1135 ret = fesetexceptflag(pflag, except);
1136 ret = fetestexcept(except);
1138 ret = fesetround(mode);
1139 ret = fegetenv(penv);
1140 ret = feholdexcept(penv);
1141 ret = fesetenv(penv);
1142 ret = feupdateenv(penv);
1143 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1145 AC_MSG_RESULT($ac_c99_fenv_tr1)
1146 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1147 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1148 [Define if C99 functions in <fenv.h> should be imported in
1149 <tr1/cfenv> in namespace std::tr1.])
1152 # Check for the existence of <stdint.h> types.
1153 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1154 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1155 AC_TRY_COMPILE([#include <stdint.h>],
1156 [typedef int8_t my_int8_t;
1157 typedef int16_t my_int16_t;
1158 typedef int32_t my_int32_t;
1159 typedef int64_t my_int64_t;
1160 typedef int_fast8_t my_int_fast8_t;
1161 typedef int_fast16_t my_int_fast16_t;
1162 typedef int_fast32_t my_int_fast32_t;
1163 typedef int_fast64_t my_int_fast64_t;
1164 typedef int_least8_t my_int_least8_t;
1165 typedef int_least16_t my_int_least16_t;
1166 typedef int_least32_t my_int_least32_t;
1167 typedef int_least64_t my_int_least64_t;
1168 typedef intmax_t my_intmax_t;
1169 typedef intptr_t my_intptr_t;
1170 typedef uint8_t my_uint8_t;
1171 typedef uint16_t my_uint16_t;
1172 typedef uint32_t my_uint32_t;
1173 typedef uint64_t my_uint64_t;
1174 typedef uint_fast8_t my_uint_fast8_t;
1175 typedef uint_fast16_t my_uint_fast16_t;
1176 typedef uint_fast32_t my_uint_fast32_t;
1177 typedef uint_fast64_t my_uint_fast64_t;
1178 typedef uint_least8_t my_uint_least8_t;
1179 typedef uint_least16_t my_uint_least16_t;
1180 typedef uint_least32_t my_uint_least32_t;
1181 typedef uint_least64_t my_uint_least64_t;
1182 typedef uintmax_t my_uintmax_t;
1183 typedef uintptr_t my_uintptr_t;
1184 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1186 AC_MSG_RESULT($ac_c99_stdint_tr1)
1187 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1188 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1189 [Define if C99 types in <stdint.h> should be imported in
1190 <tr1/cstdint> in namespace std::tr1.])
1193 # Check for the existence of <math.h> functions.
1194 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1195 AC_CACHE_VAL(ac_c99_math_tr1, [
1196 AC_TRY_COMPILE([#include <math.h>],
1197 [typedef double_t my_double_t;
1198 typedef float_t my_float_t;
1212 copysignf(0.0f, 0.0f);
1213 copysignl(0.0l, 0.0l);
1230 fmaf(0.0f, 0.0f, 0.0f);
1231 fmal(0.0l, 0.0l, 0.0l);
1274 nextafter(0.0, 0.0);
1275 nextafterf(0.0f, 0.0f);
1276 nextafterl(0.0l, 0.0l);
1277 nexttoward(0.0, 0.0);
1278 nexttowardf(0.0f, 0.0f);
1279 nexttowardl(0.0l, 0.0l);
1280 remainder(0.0, 0.0);
1281 remainderf(0.0f, 0.0f);
1282 remainderl(0.0l, 0.0l);
1283 remquo(0.0, 0.0, 0);
1284 remquo(0.0f, 0.0f, 0);
1285 remquo(0.0l, 0.0l, 0);
1304 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1306 AC_MSG_RESULT($ac_c99_math_tr1)
1307 if test x"$ac_c99_math_tr1" = x"yes"; then
1308 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1309 [Define if C99 functions or macros in <math.h> should be imported
1310 in <tr1/cmath> in namespace std::tr1.])
1313 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1314 # sense if the previous check fails, per C99, 7.8/1).
1315 ac_c99_inttypes_tr1=no;
1316 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1317 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1318 AC_TRY_COMPILE([#include <inttypes.h>],
1319 [intmax_t i, numer, denom, base;
1322 intmax_t ret = imaxabs(i);
1323 imaxdiv_t dret = imaxdiv(numer, denom);
1324 ret = strtoimax(s, endptr, base);
1325 uintmax_t uret = strtoumax(s, endptr, base);
1326 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1328 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1329 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1330 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1331 [Define if C99 functions in <inttypes.h> should be imported in
1332 <tr1/cinttypes> in namespace std::tr1.])
1335 # Check for the existence of the <stdbool.h> header.
1336 AC_CHECK_HEADERS(stdbool.h)
1343 dnl Check for what type of C headers to use.
1345 dnl --enable-cheaders= [does stuff].
1346 dnl --disable-cheaders [does not do anything, really].
1347 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1348 dnl Where DEFAULT is either `c' or `c_std'.
1350 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1351 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1352 [construct "C" headers for g++], [permit c|c_std])
1353 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1355 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1357 AC_SUBST(C_INCLUDE_DIR)
1358 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1359 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1360 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1365 dnl Check for which locale library to use. The choice is mapped to
1366 dnl a subdirectory of config/locale.
1368 dnl Default is generic.
1370 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1371 AC_MSG_CHECKING([for C locale to use])
1372 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1373 [use MODEL for target locale package],
1374 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1376 # If they didn't use this option switch, or if they specified --enable
1377 # with no specific model, we'll have to look for one. If they
1378 # specified --disable (???), do likewise.
1379 if test $enable_clocale = no || test $enable_clocale = yes; then
1383 # Either a known package, or "auto"
1384 enable_clocale_flag=$enable_clocale
1386 # Probe for locale support if no specific model is specified.
1387 # Default to "generic".
1388 if test $enable_clocale_flag = auto; then
1389 case ${target_os} in
1390 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1391 AC_EGREP_CPP([_GLIBCXX_ok], [
1392 #include <features.h>
1393 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1396 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1398 # Test for bugs early in glibc-2.2.x series
1399 if test $enable_clocale_flag = gnu; then
1401 #define _GNU_SOURCE 1
1404 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1405 extern __typeof(newlocale) __newlocale;
1406 extern __typeof(duplocale) __duplocale;
1407 extern __typeof(strcoll_l) __strcoll_l;
1411 const char __one[] = "Äuglein Augmen";
1412 const char __two[] = "Äuglein";
1417 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1418 loc_dup = __duplocale(loc);
1419 i = __strcoll_l(__one, __two, loc);
1420 j = __strcoll_l(__one, __two, loc_dup);
1424 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1425 [enable_clocale_flag=generic])
1428 # ... at some point put __strxfrm_l tests in as well.
1431 enable_clocale_flag=darwin
1434 enable_clocale_flag=generic
1439 # Deal with gettext issues. Default to not using it (=no) until we detect
1440 # support for it later. Let the user turn it off via --e/d, but let that
1441 # default to on for easier handling.
1444 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1448 # Set configure bits for specified locale package
1449 case ${enable_clocale_flag} in
1451 AC_MSG_RESULT(generic)
1453 CLOCALE_H=config/locale/generic/c_locale.h
1454 CLOCALE_CC=config/locale/generic/c_locale.cc
1455 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1456 CCOLLATE_CC=config/locale/generic/collate_members.cc
1457 CCTYPE_CC=config/locale/generic/ctype_members.cc
1458 CMESSAGES_H=config/locale/generic/messages_members.h
1459 CMESSAGES_CC=config/locale/generic/messages_members.cc
1460 CMONEY_CC=config/locale/generic/monetary_members.cc
1461 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1462 CTIME_H=config/locale/generic/time_members.h
1463 CTIME_CC=config/locale/generic/time_members.cc
1464 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1467 AC_MSG_RESULT(darwin or freebsd)
1469 CLOCALE_H=config/locale/generic/c_locale.h
1470 CLOCALE_CC=config/locale/generic/c_locale.cc
1471 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1472 CCOLLATE_CC=config/locale/generic/collate_members.cc
1473 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1474 CMESSAGES_H=config/locale/generic/messages_members.h
1475 CMESSAGES_CC=config/locale/generic/messages_members.cc
1476 CMONEY_CC=config/locale/generic/monetary_members.cc
1477 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1478 CTIME_H=config/locale/generic/time_members.h
1479 CTIME_CC=config/locale/generic/time_members.cc
1480 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1486 # Declare intention to use gettext, and add support for specific
1488 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1491 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1492 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1493 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1496 # Export the build objects.
1497 for ling in $ALL_LINGUAS; do \
1498 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1499 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1501 AC_SUBST(glibcxx_MOFILES)
1502 AC_SUBST(glibcxx_POFILES)
1504 CLOCALE_H=config/locale/gnu/c_locale.h
1505 CLOCALE_CC=config/locale/gnu/c_locale.cc
1506 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1507 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1508 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1509 CMESSAGES_H=config/locale/gnu/messages_members.h
1510 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1511 CMONEY_CC=config/locale/gnu/monetary_members.cc
1512 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1513 CTIME_H=config/locale/gnu/time_members.h
1514 CTIME_CC=config/locale/gnu/time_members.cc
1515 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1518 AC_MSG_RESULT(IEEE 1003.1)
1520 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1521 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1522 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1523 CCOLLATE_CC=config/locale/generic/collate_members.cc
1524 CCTYPE_CC=config/locale/generic/ctype_members.cc
1525 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1526 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1527 CMONEY_CC=config/locale/generic/monetary_members.cc
1528 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1529 CTIME_H=config/locale/generic/time_members.h
1530 CTIME_CC=config/locale/generic/time_members.cc
1531 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1535 # This is where the testsuite looks for locale catalogs, using the
1536 # -DLOCALEDIR define during testsuite compilation.
1537 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1538 AC_SUBST(glibcxx_localedir)
1540 # A standalone libintl (e.g., GNU libintl) may be in use.
1541 if test $USE_NLS = yes; then
1542 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1543 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1545 if test $USE_NLS = yes; then
1546 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1547 [Define if NLS translations are to be used.])
1552 AC_SUBST(CMESSAGES_H)
1553 AC_SUBST(CCODECVT_CC)
1554 AC_SUBST(CCOLLATE_CC)
1556 AC_SUBST(CMESSAGES_CC)
1558 AC_SUBST(CNUMERIC_CC)
1561 AC_SUBST(CLOCALE_CC)
1562 AC_SUBST(CLOCALE_INTERNAL_H)
1567 dnl Check for which std::allocator base class to use. The choice is
1568 dnl mapped from a subdirectory of include/ext.
1572 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1573 AC_MSG_CHECKING([for std::allocator base class])
1574 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1575 [use KIND for target std::allocator base],
1576 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1578 # If they didn't use this option switch, or if they specified --enable
1579 # with no specific model, we'll have to look for one. If they
1580 # specified --disable (???), do likewise.
1581 if test $enable_libstdcxx_allocator = no ||
1582 test $enable_libstdcxx_allocator = yes;
1584 enable_libstdcxx_allocator=auto
1587 # Either a known package, or "auto". Auto implies the default choice
1588 # for a particular platform.
1589 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1591 # Probe for host-specific support if no specific model is specified.
1593 if test $enable_libstdcxx_allocator_flag = auto; then
1594 case ${target_os} in
1595 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1596 enable_libstdcxx_allocator_flag=new
1599 enable_libstdcxx_allocator_flag=new
1603 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1606 # Set configure bits for specified locale package
1607 case ${enable_libstdcxx_allocator_flag} in
1609 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1610 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1613 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1614 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1617 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1618 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1621 ALLOCATOR_H=config/allocator/new_allocator_base.h
1622 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1625 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1626 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1630 AC_SUBST(ALLOCATOR_H)
1631 AC_SUBST(ALLOCATOR_NAME)
1636 dnl Check for whether the Boost-derived checks should be turned on.
1638 dnl --enable-concept-checks turns them on.
1639 dnl --disable-concept-checks leaves them off.
1640 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1641 dnl Where DEFAULT is either `yes' or `no'.
1643 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1644 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1645 if test $enable_concept_checks = yes; then
1646 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1647 [Define to use concept checking code from the boost libraries.])
1653 dnl Check for which I/O library to use: stdio, or something specific.
1655 dnl Default is stdio.
1657 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1658 AC_MSG_CHECKING([for underlying I/O to use])
1659 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1660 [use target-specific I/O package], [permit stdio])
1662 # Now that libio has been removed, you can have any color you want as long
1663 # as it's black. This is one big no-op until other packages are added, but
1664 # showing the framework never hurts.
1665 case ${enable_cstdio} in
1667 CSTDIO_H=config/io/c_io_stdio.h
1668 BASIC_FILE_H=config/io/basic_file_stdio.h
1669 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1670 AC_MSG_RESULT(stdio)
1675 AC_SUBST(BASIC_FILE_H)
1676 AC_SUBST(BASIC_FILE_CC)
1681 dnl Check for "unusual" flags to pass to the compiler while building.
1683 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1684 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1685 dnl --disable-cxx-flags passes nothing.
1686 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1687 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1688 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1689 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1690 dnl If "default flags" is an empty string, the effect is the same
1691 dnl as --disable or --enable=no.
1693 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1694 AC_MSG_CHECKING([for extra compiler flags for building])
1695 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1696 [pass compiler FLAGS when building library],
1697 [case "x$enable_cxx_flags" in
1698 xno | x) enable_cxx_flags= ;;
1700 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1703 # Run through flags (either default or command-line) and set anything
1704 # extra (e.g., #defines) that must accompany particular g++ options.
1705 if test -n "$enable_cxx_flags"; then
1706 for f in $enable_cxx_flags; do
1710 *) # and we're trying to pass /what/ exactly?
1711 AC_MSG_ERROR([compiler flags start with a -]) ;;
1716 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1717 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1718 AC_SUBST(EXTRA_CXX_FLAGS)
1723 dnl Check to see if debugging libraries are to be built.
1725 dnl --enable-libstdcxx-debug
1726 dnl builds a separate set of debugging libraries in addition to the
1727 dnl normal (shared, static) libstdc++ binaries.
1729 dnl --disable-libstdcxx-debug
1730 dnl builds only one (non-debug) version of libstdc++.
1732 dnl --enable-libstdcxx-debug-flags=FLAGS
1733 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1735 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1736 dnl Where DEFAULT is either `yes' or `no'.
1738 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1739 AC_MSG_CHECKING([for additional debug build])
1740 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1741 AC_MSG_RESULT($enable_libstdcxx_debug)
1742 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1747 dnl Check for explicit debug flags.
1749 dnl --enable-libstdcxx-debug-flags='-O1'
1750 dnl is a general method for passing flags to be used when
1751 dnl building debug libraries with --enable-debug.
1753 dnl --disable-libstdcxx-debug-flags does nothing.
1754 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1755 dnl If "default flags" is an empty string, the effect is the same
1756 dnl as --disable or --enable=no.
1758 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1759 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1760 [pass compiler FLAGS when building debug library],
1761 [case "x$enable_libstdcxx_debug_flags" in
1762 xno | x) enable_libstdcxx_debug_flags= ;;
1764 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1767 # Option parsed, now set things appropriately
1768 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1769 AC_SUBST(DEBUG_FLAGS)
1771 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1776 dnl Check if the user only wants a freestanding library implementation.
1778 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1779 dnl installing only the headers required by [17.4.1.3] and the language
1780 dnl support library. More than that will be built (to keep the Makefiles
1781 dnl conveniently clean), but not installed.
1784 dnl is_hosted (yes/no)
1787 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1789 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1790 AC_ARG_ENABLE([hosted-libstdcxx],
1791 AC_HELP_STRING([--disable-hosted-libstdcxx],
1792 [only build freestanding C++ runtime support]),,
1795 enable_hosted_libstdcxx=no
1798 enable_hosted_libstdcxx=yes
1801 if test "$enable_hosted_libstdcxx" = no; then
1802 AC_MSG_NOTICE([Only freestanding libraries will be built])
1806 enable_libstdcxx_pch=no
1811 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1812 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1813 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1818 dnl Check for template specializations for the 'long long' type.
1819 dnl The result determines only whether 'long long' I/O is enabled; things
1820 dnl like numeric_limits<> specializations are always available.
1822 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1823 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1824 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1825 dnl Where DEFAULT is either `yes' or `no'.
1827 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1828 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1829 if test $enable_long_long = yes; then
1830 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1831 [Define if code specialized for long long should be used.])
1833 AC_MSG_CHECKING([for enabled long long specializations])
1834 AC_MSG_RESULT([$enable_long_long])
1839 dnl Check for template specializations for the 'wchar_t' type.
1841 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1842 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1843 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1844 dnl Where DEFAULT is either `yes' or `no'.
1846 dnl Necessary support (probed along with C99 support) must also be present.
1848 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1849 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1850 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1851 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1852 [Define if code specialized for wchar_t should be used.])
1854 AC_MSG_CHECKING([for enabled wchar_t specializations])
1855 AC_MSG_RESULT([$enable_wchar_t])
1860 dnl Check to see if building and using a C++ precompiled header can be done.
1862 dnl --enable-libstdcxx-pch=yes
1863 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1864 dnl may work, after some light-hearted attempts to puzzle out compiler
1865 dnl support, flip bits on in include/Makefile.am
1867 dnl --disable-libstdcxx-pch
1868 dnl turns off attempts to use or build stdc++.h.gch.
1871 dnl glibcxx_PCHFLAGS
1873 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1874 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1875 if test $enable_libstdcxx_pch = yes; then
1876 AC_CACHE_CHECK([for compiler with PCH support],
1877 [glibcxx_cv_prog_CXX_pch],
1878 [ac_save_CXXFLAGS="$CXXFLAGS"
1879 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1882 echo '#include <math.h>' > conftest.h
1883 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1884 -o conftest.h.gch 1>&5 2>&1 &&
1885 echo '#error "pch failed"' > conftest.h &&
1886 echo '#include "conftest.h"' > conftest.cc &&
1887 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1889 glibcxx_cv_prog_CXX_pch=yes
1891 glibcxx_cv_prog_CXX_pch=no
1894 CXXFLAGS=$ac_save_CXXFLAGS
1897 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1900 AC_MSG_CHECKING([for enabled PCH])
1901 AC_MSG_RESULT([$enable_libstdcxx_pch])
1903 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1904 if test $enable_libstdcxx_pch = yes; then
1905 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1909 AC_SUBST(glibcxx_PCHFLAGS)
1914 dnl Check for exception handling support. If an explicit enable/disable
1915 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1916 dnl target may or may not support call frame exceptions.
1918 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1919 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1920 dnl Neither one forces an attempt at detection.
1923 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1925 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1926 AC_MSG_CHECKING([for exception model to use])
1929 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1930 [force use of builtin_setjmp for exceptions],
1931 [permit yes|no|auto])
1933 if test $enable_sjlj_exceptions = auto; then
1934 # Botheration. Now we've got to detect the exception model. Link tests
1935 # against libgcc.a are problematic since we've not been given proper -L
1936 # bits for single-tree newlib and libgloss.
1938 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1939 cat > conftest.$ac_ext << EOF
1940 [#]line __oline__ "configure"
1949 old_CXXFLAGS="$CXXFLAGS"
1951 if AC_TRY_EVAL(ac_compile); then
1952 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1953 enable_sjlj_exceptions=yes
1954 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1955 enable_sjlj_exceptions=no
1956 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
1957 enable_sjlj_exceptions=no
1960 CXXFLAGS="$old_CXXFLAGS"
1964 # This is a tad weird, for hysterical raisins. We have to map
1965 # enable/disable to two different models.
1966 case $enable_sjlj_exceptions in
1968 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1969 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1970 ac_exception_model_name=sjlj
1973 ac_exception_model_name="call frame"
1976 AC_MSG_ERROR([unable to detect exception model])
1980 AC_MSG_RESULT($ac_exception_model_name)
1985 dnl Add version tags to symbols in shared library (or not), additionally
1986 dnl marking other symbols as private/local (or not).
1988 dnl --enable-symvers=style adds a version script to the linker call when
1989 dnl creating the shared library. The choice of version script is
1990 dnl controlled by 'style'.
1991 dnl --disable-symvers does not.
1992 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1993 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1994 dnl choose a default style based on linker characteristics. Passing
1995 dnl 'no' disables versioning.
1997 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1999 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2000 [enables symbol versioning of the shared library],
2001 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2003 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2004 # don't know enough about $LD to do tricks...
2005 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2007 # Turn a 'yes' into a suitable default.
2008 if test x$enable_symvers = xyes ; then
2009 if test $enable_shared = no || test "x$LD" = x ; then
2012 if test $with_gnu_ld = yes ; then
2015 case ${target_os} in
2017 enable_symvers=darwin ;;
2019 enable_symvers=no ;;
2025 # Check to see if 'darwin' or 'darwin-export' can win.
2026 if test x$enable_symvers = xdarwin-export ; then
2027 enable_symvers=darwin
2030 # Check to see if 'gnu' can win.
2031 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2032 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2033 AC_MSG_CHECKING([for shared libgcc])
2034 ac_save_CFLAGS="$CFLAGS"
2036 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2037 CFLAGS="$ac_save_CFLAGS"
2038 if test $glibcxx_shared_libgcc = no; then
2039 cat > conftest.c <<EOF
2040 int main (void) { return 0; }
2043 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2044 -shared -shared-libgcc -o conftest.so \
2045 conftest.c -v 2>&1 >/dev/null \
2046 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2048 rm -f conftest.c conftest.so
2049 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2050 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2051 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2052 CFLAGS="$ac_save_CFLAGS"
2055 AC_MSG_RESULT($glibcxx_shared_libgcc)
2057 # For GNU ld, we need at least this version. The format is described in
2058 # GLIBCXX_CHECK_LINKER_FEATURES above.
2059 glibcxx_min_gnu_ld_version=21400
2061 # If no shared libgcc, can't win.
2062 if test $glibcxx_shared_libgcc != yes; then
2063 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2064 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2065 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2067 elif test $with_gnu_ld != yes ; then
2069 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2070 AC_MSG_WARN([=== you are not using the GNU linker.])
2071 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2073 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2074 # The right tools, the right setup, but too old. Fallbacks?
2075 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2076 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2077 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2078 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2079 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2084 # Everything parsed; figure out what file to use.
2085 case $enable_symvers in
2087 SYMVER_FILE=config/abi/pre/none.ver
2090 SYMVER_FILE=config/abi/pre/gnu.ver
2091 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2092 [Define to use GNU versioning in the shared library.])
2094 gnu-versioned-namespace)
2095 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2096 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2097 [Define to use GNU namespace versioning in the shared library.])
2100 SYMVER_FILE=config/abi/pre/gnu.ver
2101 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2102 [Define to use darwin versioning in the shared library.])
2106 if test x$enable_symvers != xno ; then
2107 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2108 [Define to use symbol versioning in the shared library.])
2111 AC_SUBST(SYMVER_FILE)
2112 AC_SUBST(port_specific_symbol_files)
2113 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2114 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2115 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2116 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2117 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2119 # Now, set up compatibility support, if any.
2120 # In addition, need this to deal with std::size_t mangling in
2121 # src/compatibility.cc. In a perfect world, could use
2122 # typeid(std::size_t).name()[0] to do direct substitution.
2123 AC_MSG_CHECKING([for size_t as unsigned int])
2124 ac_save_CFLAGS="$CFLAGS"
2126 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2127 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2128 CFLAGS=$ac_save_CFLAGS
2129 if test "$glibcxx_size_t_is_i" = yes; then
2130 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2132 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2134 AC_MSG_CHECKING([for ptrdiff_t as int])
2135 ac_save_CFLAGS="$CFLAGS"
2137 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2138 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2139 CFLAGS=$ac_save_CFLAGS
2140 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2141 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2143 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2148 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2149 dnl We must stage the required headers so that they will be installed
2150 dnl with the library (unlike libgcc, the STL implementation is provided
2151 dnl solely within headers). Since we must not inject random user-space
2152 dnl macro names into user-provided C++ code, we first stage into <file>-in
2153 dnl and process to <file> with an output command. The reason for a two-
2154 dnl stage process here is to correctly handle $srcdir!=$objdir without
2155 dnl having to write complex code (the sed commands to clean the macro
2156 dnl namespace are complex and fragile enough as it is). We must also
2157 dnl add a relative path so that -I- is supported properly.
2160 dnl glibcxx_thread_h
2163 dnl HAVE_GTHR_DEFAULT
2165 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2166 AC_MSG_CHECKING([for thread model used by GCC])
2167 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2168 AC_MSG_RESULT([$target_thread_file])
2170 if test $target_thread_file != single; then
2171 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2172 [Define if gthr-default.h exists
2173 (meaning that threading support is enabled).])
2176 glibcxx_thread_h=gthr-$target_thread_file.h
2178 dnl Check for __GTHREADS define.
2179 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2180 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2186 AC_SUBST(glibcxx_thread_h)
2190 # Check whether LC_MESSAGES is available in <locale.h>.
2191 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2193 # This file file be copied and used freely without restrictions. It can
2194 # be used in projects which are not available under the GNU Public License
2195 # but which still want to provide support for the GNU gettext functionality.
2196 # Please note that the actual code is *not* freely available.
2199 AC_DEFUN([AC_LC_MESSAGES], [
2200 AC_CHECK_HEADER(locale.h, [
2201 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2202 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2203 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2204 if test $ac_cv_val_LC_MESSAGES = yes; then
2205 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2206 [Define if LC_MESSAGES is available in <locale.h>.])
2211 # Macros from the top-level gcc directory.
2212 m4_include([../config/tls.m4])