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>],
1210 copysignf(0.0f, 0.0f);
1211 copysignl(0.0l, 0.0l);
1228 fmaf(0.0f, 0.0f, 0.0f);
1229 fmal(0.0l, 0.0l, 0.0l);
1272 nextafter(0.0, 0.0);
1273 nextafterf(0.0f, 0.0f);
1274 nextafterl(0.0l, 0.0l);
1275 nexttoward(0.0, 0.0);
1276 nexttowardf(0.0f, 0.0f);
1277 nexttowardl(0.0l, 0.0l);
1278 remainder(0.0, 0.0);
1279 remainderf(0.0f, 0.0f);
1280 remainderl(0.0l, 0.0l);
1281 remquo(0.0, 0.0, 0);
1282 remquo(0.0f, 0.0f, 0);
1283 remquo(0.0l, 0.0l, 0);
1302 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1304 AC_MSG_RESULT($ac_c99_math_tr1)
1305 if test x"$ac_c99_math_tr1" = x"yes"; then
1306 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1307 [Define if C99 functions or macros in <math.h> should be imported
1308 in <tr1/cmath> in namespace std::tr1.])
1311 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1312 # sense if the previous check fails, per C99, 7.8/1).
1313 ac_c99_inttypes_tr1=no;
1314 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1315 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1316 AC_TRY_COMPILE([#include <inttypes.h>],
1317 [intmax_t i, numer, denom, base;
1320 intmax_t ret = imaxabs(i);
1321 imaxdiv_t dret = imaxdiv(numer, denom);
1322 ret = strtoimax(s, endptr, base);
1323 uintmax_t uret = strtoumax(s, endptr, base);
1324 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1326 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1327 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1328 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1329 [Define if C99 functions in <inttypes.h> should be imported in
1330 <tr1/cinttypes> in namespace std::tr1.])
1338 dnl Check for what type of C headers to use.
1340 dnl --enable-cheaders= [does stuff].
1341 dnl --disable-cheaders [does not do anything, really].
1342 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1343 dnl Where DEFAULT is either `c' or `c_std'.
1345 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1346 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1347 [construct "C" headers for g++], [permit c|c_std])
1348 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1350 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1352 AC_SUBST(C_INCLUDE_DIR)
1353 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1354 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1355 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1360 dnl Check for which locale library to use. The choice is mapped to
1361 dnl a subdirectory of config/locale.
1363 dnl Default is generic.
1365 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1366 AC_MSG_CHECKING([for C locale to use])
1367 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1368 [use MODEL for target locale package],
1369 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1371 # If they didn't use this option switch, or if they specified --enable
1372 # with no specific model, we'll have to look for one. If they
1373 # specified --disable (???), do likewise.
1374 if test $enable_clocale = no || test $enable_clocale = yes; then
1378 # Either a known package, or "auto"
1379 enable_clocale_flag=$enable_clocale
1381 # Probe for locale support if no specific model is specified.
1382 # Default to "generic".
1383 if test $enable_clocale_flag = auto; then
1384 case ${target_os} in
1385 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1386 AC_EGREP_CPP([_GLIBCXX_ok], [
1387 #include <features.h>
1388 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1391 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1393 # Test for bugs early in glibc-2.2.x series
1394 if test $enable_clocale_flag = gnu; then
1396 #define _GNU_SOURCE 1
1399 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1400 extern __typeof(newlocale) __newlocale;
1401 extern __typeof(duplocale) __duplocale;
1402 extern __typeof(strcoll_l) __strcoll_l;
1406 const char __one[] = "Äuglein Augmen";
1407 const char __two[] = "Äuglein";
1412 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1413 loc_dup = __duplocale(loc);
1414 i = __strcoll_l(__one, __two, loc);
1415 j = __strcoll_l(__one, __two, loc_dup);
1419 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1420 [enable_clocale_flag=generic])
1423 # ... at some point put __strxfrm_l tests in as well.
1426 enable_clocale_flag=darwin
1429 enable_clocale_flag=generic
1434 # Deal with gettext issues. Default to not using it (=no) until we detect
1435 # support for it later. Let the user turn it off via --e/d, but let that
1436 # default to on for easier handling.
1439 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1443 # Set configure bits for specified locale package
1444 case ${enable_clocale_flag} in
1446 AC_MSG_RESULT(generic)
1448 CLOCALE_H=config/locale/generic/c_locale.h
1449 CLOCALE_CC=config/locale/generic/c_locale.cc
1450 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1451 CCOLLATE_CC=config/locale/generic/collate_members.cc
1452 CCTYPE_CC=config/locale/generic/ctype_members.cc
1453 CMESSAGES_H=config/locale/generic/messages_members.h
1454 CMESSAGES_CC=config/locale/generic/messages_members.cc
1455 CMONEY_CC=config/locale/generic/monetary_members.cc
1456 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1457 CTIME_H=config/locale/generic/time_members.h
1458 CTIME_CC=config/locale/generic/time_members.cc
1459 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1462 AC_MSG_RESULT(darwin or freebsd)
1464 CLOCALE_H=config/locale/generic/c_locale.h
1465 CLOCALE_CC=config/locale/generic/c_locale.cc
1466 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1467 CCOLLATE_CC=config/locale/generic/collate_members.cc
1468 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1469 CMESSAGES_H=config/locale/generic/messages_members.h
1470 CMESSAGES_CC=config/locale/generic/messages_members.cc
1471 CMONEY_CC=config/locale/generic/monetary_members.cc
1472 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1473 CTIME_H=config/locale/generic/time_members.h
1474 CTIME_CC=config/locale/generic/time_members.cc
1475 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1481 # Declare intention to use gettext, and add support for specific
1483 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1486 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1487 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1488 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1491 # Export the build objects.
1492 for ling in $ALL_LINGUAS; do \
1493 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1494 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1496 AC_SUBST(glibcxx_MOFILES)
1497 AC_SUBST(glibcxx_POFILES)
1499 CLOCALE_H=config/locale/gnu/c_locale.h
1500 CLOCALE_CC=config/locale/gnu/c_locale.cc
1501 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1502 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1503 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1504 CMESSAGES_H=config/locale/gnu/messages_members.h
1505 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1506 CMONEY_CC=config/locale/gnu/monetary_members.cc
1507 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1508 CTIME_H=config/locale/gnu/time_members.h
1509 CTIME_CC=config/locale/gnu/time_members.cc
1510 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1513 AC_MSG_RESULT(IEEE 1003.1)
1515 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1516 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1517 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1518 CCOLLATE_CC=config/locale/generic/collate_members.cc
1519 CCTYPE_CC=config/locale/generic/ctype_members.cc
1520 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1521 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1522 CMONEY_CC=config/locale/generic/monetary_members.cc
1523 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1524 CTIME_H=config/locale/generic/time_members.h
1525 CTIME_CC=config/locale/generic/time_members.cc
1526 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1530 # This is where the testsuite looks for locale catalogs, using the
1531 # -DLOCALEDIR define during testsuite compilation.
1532 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1533 AC_SUBST(glibcxx_localedir)
1535 # A standalone libintl (e.g., GNU libintl) may be in use.
1536 if test $USE_NLS = yes; then
1537 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1538 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1540 if test $USE_NLS = yes; then
1541 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1542 [Define if NLS translations are to be used.])
1547 AC_SUBST(CMESSAGES_H)
1548 AC_SUBST(CCODECVT_CC)
1549 AC_SUBST(CCOLLATE_CC)
1551 AC_SUBST(CMESSAGES_CC)
1553 AC_SUBST(CNUMERIC_CC)
1556 AC_SUBST(CLOCALE_CC)
1557 AC_SUBST(CLOCALE_INTERNAL_H)
1562 dnl Check for which std::allocator base class to use. The choice is
1563 dnl mapped from a subdirectory of include/ext.
1567 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1568 AC_MSG_CHECKING([for std::allocator base class])
1569 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1570 [use KIND for target std::allocator base],
1571 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1573 # If they didn't use this option switch, or if they specified --enable
1574 # with no specific model, we'll have to look for one. If they
1575 # specified --disable (???), do likewise.
1576 if test $enable_libstdcxx_allocator = no ||
1577 test $enable_libstdcxx_allocator = yes;
1579 enable_libstdcxx_allocator=auto
1582 # Either a known package, or "auto". Auto implies the default choice
1583 # for a particular platform.
1584 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1586 # Probe for host-specific support if no specific model is specified.
1588 if test $enable_libstdcxx_allocator_flag = auto; then
1589 case ${target_os} in
1590 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1591 enable_libstdcxx_allocator_flag=new
1594 enable_libstdcxx_allocator_flag=new
1598 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1601 # Set configure bits for specified locale package
1602 case ${enable_libstdcxx_allocator_flag} in
1604 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1605 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1608 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1609 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1612 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1613 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1616 ALLOCATOR_H=config/allocator/new_allocator_base.h
1617 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1620 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1621 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1625 AC_SUBST(ALLOCATOR_H)
1626 AC_SUBST(ALLOCATOR_NAME)
1631 dnl Check for whether the Boost-derived checks should be turned on.
1633 dnl --enable-concept-checks turns them on.
1634 dnl --disable-concept-checks leaves them off.
1635 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1636 dnl Where DEFAULT is either `yes' or `no'.
1638 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1639 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1640 if test $enable_concept_checks = yes; then
1641 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1642 [Define to use concept checking code from the boost libraries.])
1648 dnl Check for which I/O library to use: stdio, or something specific.
1650 dnl Default is stdio.
1652 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1653 AC_MSG_CHECKING([for underlying I/O to use])
1654 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1655 [use target-specific I/O package], [permit stdio])
1657 # Now that libio has been removed, you can have any color you want as long
1658 # as it's black. This is one big no-op until other packages are added, but
1659 # showing the framework never hurts.
1660 case ${enable_cstdio} in
1662 CSTDIO_H=config/io/c_io_stdio.h
1663 BASIC_FILE_H=config/io/basic_file_stdio.h
1664 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1665 AC_MSG_RESULT(stdio)
1670 AC_SUBST(BASIC_FILE_H)
1671 AC_SUBST(BASIC_FILE_CC)
1676 dnl Check for "unusual" flags to pass to the compiler while building.
1678 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1679 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1680 dnl --disable-cxx-flags passes nothing.
1681 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1682 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1683 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1684 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1685 dnl If "default flags" is an empty string, the effect is the same
1686 dnl as --disable or --enable=no.
1688 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1689 AC_MSG_CHECKING([for extra compiler flags for building])
1690 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1691 [pass compiler FLAGS when building library],
1692 [case "x$enable_cxx_flags" in
1693 xno | x) enable_cxx_flags= ;;
1695 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1698 # Run through flags (either default or command-line) and set anything
1699 # extra (e.g., #defines) that must accompany particular g++ options.
1700 if test -n "$enable_cxx_flags"; then
1701 for f in $enable_cxx_flags; do
1705 *) # and we're trying to pass /what/ exactly?
1706 AC_MSG_ERROR([compiler flags start with a -]) ;;
1711 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1712 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1713 AC_SUBST(EXTRA_CXX_FLAGS)
1718 dnl Check to see if debugging libraries are to be built.
1720 dnl --enable-libstdcxx-debug
1721 dnl builds a separate set of debugging libraries in addition to the
1722 dnl normal (shared, static) libstdc++ binaries.
1724 dnl --disable-libstdcxx-debug
1725 dnl builds only one (non-debug) version of libstdc++.
1727 dnl --enable-libstdcxx-debug-flags=FLAGS
1728 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1730 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1731 dnl Where DEFAULT is either `yes' or `no'.
1733 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1734 AC_MSG_CHECKING([for additional debug build])
1735 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1736 AC_MSG_RESULT($enable_libstdcxx_debug)
1737 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1742 dnl Check for explicit debug flags.
1744 dnl --enable-libstdcxx-debug-flags='-O1'
1745 dnl is a general method for passing flags to be used when
1746 dnl building debug libraries with --enable-debug.
1748 dnl --disable-libstdcxx-debug-flags does nothing.
1749 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1750 dnl If "default flags" is an empty string, the effect is the same
1751 dnl as --disable or --enable=no.
1753 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1754 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1755 [pass compiler FLAGS when building debug library],
1756 [case "x$enable_libstdcxx_debug_flags" in
1757 xno | x) enable_libstdcxx_debug_flags= ;;
1759 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1762 # Option parsed, now set things appropriately
1763 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1764 AC_SUBST(DEBUG_FLAGS)
1766 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1771 dnl Check if the user only wants a freestanding library implementation.
1773 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1774 dnl installing only the headers required by [17.4.1.3] and the language
1775 dnl support library. More than that will be built (to keep the Makefiles
1776 dnl conveniently clean), but not installed.
1779 dnl is_hosted (yes/no)
1782 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1784 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1785 AC_ARG_ENABLE([hosted-libstdcxx],
1786 AC_HELP_STRING([--disable-hosted-libstdcxx],
1787 [only build freestanding C++ runtime support]),,
1790 enable_hosted_libstdcxx=no
1793 enable_hosted_libstdcxx=yes
1796 if test "$enable_hosted_libstdcxx" = no; then
1797 AC_MSG_NOTICE([Only freestanding libraries will be built])
1801 enable_libstdcxx_pch=no
1806 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1807 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1808 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1813 dnl Check for template specializations for the 'long long' type.
1814 dnl The result determines only whether 'long long' I/O is enabled; things
1815 dnl like numeric_limits<> specializations are always available.
1817 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1818 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1819 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1820 dnl Where DEFAULT is either `yes' or `no'.
1822 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1823 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1824 if test $enable_long_long = yes; then
1825 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1826 [Define if code specialized for long long should be used.])
1828 AC_MSG_CHECKING([for enabled long long specializations])
1829 AC_MSG_RESULT([$enable_long_long])
1834 dnl Check for template specializations for the 'wchar_t' type.
1836 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1837 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1838 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1839 dnl Where DEFAULT is either `yes' or `no'.
1841 dnl Necessary support (probed along with C99 support) must also be present.
1843 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1844 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1845 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1846 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1847 [Define if code specialized for wchar_t should be used.])
1849 AC_MSG_CHECKING([for enabled wchar_t specializations])
1850 AC_MSG_RESULT([$enable_wchar_t])
1855 dnl Check to see if building and using a C++ precompiled header can be done.
1857 dnl --enable-libstdcxx-pch=yes
1858 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1859 dnl may work, after some light-hearted attempts to puzzle out compiler
1860 dnl support, flip bits on in include/Makefile.am
1862 dnl --disable-libstdcxx-pch
1863 dnl turns off attempts to use or build stdc++.h.gch.
1866 dnl glibcxx_PCHFLAGS
1868 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1869 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1870 if test $enable_libstdcxx_pch = yes; then
1871 AC_CACHE_CHECK([for compiler with PCH support],
1872 [glibcxx_cv_prog_CXX_pch],
1873 [ac_save_CXXFLAGS="$CXXFLAGS"
1874 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1877 echo '#include <math.h>' > conftest.h
1878 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1879 -o conftest.h.gch 1>&5 2>&1 &&
1880 echo '#error "pch failed"' > conftest.h &&
1881 echo '#include "conftest.h"' > conftest.cc &&
1882 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1884 glibcxx_cv_prog_CXX_pch=yes
1886 glibcxx_cv_prog_CXX_pch=no
1889 CXXFLAGS=$ac_save_CXXFLAGS
1892 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1895 AC_MSG_CHECKING([for enabled PCH])
1896 AC_MSG_RESULT([$enable_libstdcxx_pch])
1898 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1899 if test $enable_libstdcxx_pch = yes; then
1900 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1904 AC_SUBST(glibcxx_PCHFLAGS)
1909 dnl Check for exception handling support. If an explicit enable/disable
1910 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1911 dnl target may or may not support call frame exceptions.
1913 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1914 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1915 dnl Neither one forces an attempt at detection.
1918 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1920 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1921 AC_MSG_CHECKING([for exception model to use])
1924 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1925 [force use of builtin_setjmp for exceptions],
1926 [permit yes|no|auto])
1928 if test $enable_sjlj_exceptions = auto; then
1929 # Botheration. Now we've got to detect the exception model. Link tests
1930 # against libgcc.a are problematic since we've not been given proper -L
1931 # bits for single-tree newlib and libgloss.
1933 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1934 cat > conftest.$ac_ext << EOF
1935 [#]line __oline__ "configure"
1944 old_CXXFLAGS="$CXXFLAGS"
1946 if AC_TRY_EVAL(ac_compile); then
1947 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1948 enable_sjlj_exceptions=yes
1949 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1950 enable_sjlj_exceptions=no
1951 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
1952 enable_sjlj_exceptions=no
1955 CXXFLAGS="$old_CXXFLAGS"
1959 # This is a tad weird, for hysterical raisins. We have to map
1960 # enable/disable to two different models.
1961 case $enable_sjlj_exceptions in
1963 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1964 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1965 ac_exception_model_name=sjlj
1968 ac_exception_model_name="call frame"
1971 AC_MSG_ERROR([unable to detect exception model])
1975 AC_MSG_RESULT($ac_exception_model_name)
1980 dnl Add version tags to symbols in shared library (or not), additionally
1981 dnl marking other symbols as private/local (or not).
1983 dnl --enable-symvers=style adds a version script to the linker call when
1984 dnl creating the shared library. The choice of version script is
1985 dnl controlled by 'style'.
1986 dnl --disable-symvers does not.
1987 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1988 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1989 dnl choose a default style based on linker characteristics. Passing
1990 dnl 'no' disables versioning.
1992 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1994 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1995 [enables symbol versioning of the shared library],
1996 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
1998 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1999 # don't know enough about $LD to do tricks...
2000 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2002 # Turn a 'yes' into a suitable default.
2003 if test x$enable_symvers = xyes ; then
2004 if test $enable_shared = no || test "x$LD" = x ; then
2007 if test $with_gnu_ld = yes ; then
2010 case ${target_os} in
2012 enable_symvers=darwin ;;
2014 enable_symvers=no ;;
2020 # Check to see if 'darwin' or 'darwin-export' can win.
2021 if test x$enable_symvers = xdarwin-export ; then
2022 enable_symvers=darwin
2025 # Check to see if 'gnu' can win.
2026 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2027 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2028 AC_MSG_CHECKING([for shared libgcc])
2029 ac_save_CFLAGS="$CFLAGS"
2031 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2032 CFLAGS="$ac_save_CFLAGS"
2033 if test $glibcxx_shared_libgcc = no; then
2034 cat > conftest.c <<EOF
2035 int main (void) { return 0; }
2038 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2039 -shared -shared-libgcc -o conftest.so \
2040 conftest.c -v 2>&1 >/dev/null \
2041 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2043 rm -f conftest.c conftest.so
2044 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2045 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2046 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2047 CFLAGS="$ac_save_CFLAGS"
2050 AC_MSG_RESULT($glibcxx_shared_libgcc)
2052 # For GNU ld, we need at least this version. The format is described in
2053 # GLIBCXX_CHECK_LINKER_FEATURES above.
2054 glibcxx_min_gnu_ld_version=21400
2056 # If no shared libgcc, can't win.
2057 if test $glibcxx_shared_libgcc != yes; then
2058 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2059 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2060 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2062 elif test $with_gnu_ld != yes ; then
2064 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2065 AC_MSG_WARN([=== you are not using the GNU linker.])
2066 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2068 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2069 # The right tools, the right setup, but too old. Fallbacks?
2070 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2071 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2072 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2073 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2074 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2079 # Everything parsed; figure out what file to use.
2080 case $enable_symvers in
2082 SYMVER_FILE=config/abi/pre/none.ver
2085 SYMVER_FILE=config/abi/pre/gnu.ver
2086 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2087 [Define to use GNU versioning in the shared library.])
2089 gnu-versioned-namespace)
2090 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2091 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2092 [Define to use GNU namespace versioning in the shared library.])
2095 SYMVER_FILE=config/abi/pre/gnu.ver
2096 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2097 [Define to use darwin versioning in the shared library.])
2101 if test x$enable_symvers != xno ; then
2102 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2103 [Define to use symbol versioning in the shared library.])
2106 AC_SUBST(SYMVER_FILE)
2107 AC_SUBST(port_specific_symbol_files)
2108 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2109 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2110 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2111 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2112 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2114 # Now, set up compatibility support, if any.
2115 # In addition, need this to deal with std::size_t mangling in
2116 # src/compatibility.cc. In a perfect world, could use
2117 # typeid(std::size_t).name()[0] to do direct substitution.
2118 AC_MSG_CHECKING([for size_t as unsigned int])
2119 ac_save_CFLAGS="$CFLAGS"
2121 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2122 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2123 CFLAGS=$ac_save_CFLAGS
2124 if test "$glibcxx_size_t_is_i" = yes; then
2125 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2127 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2129 AC_MSG_CHECKING([for ptrdiff_t as int])
2130 ac_save_CFLAGS="$CFLAGS"
2132 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2133 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2134 CFLAGS=$ac_save_CFLAGS
2135 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2136 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2138 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2143 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2144 dnl We must stage the required headers so that they will be installed
2145 dnl with the library (unlike libgcc, the STL implementation is provided
2146 dnl solely within headers). Since we must not inject random user-space
2147 dnl macro names into user-provided C++ code, we first stage into <file>-in
2148 dnl and process to <file> with an output command. The reason for a two-
2149 dnl stage process here is to correctly handle $srcdir!=$objdir without
2150 dnl having to write complex code (the sed commands to clean the macro
2151 dnl namespace are complex and fragile enough as it is). We must also
2152 dnl add a relative path so that -I- is supported properly.
2155 dnl glibcxx_thread_h
2158 dnl HAVE_GTHR_DEFAULT
2160 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2161 AC_MSG_CHECKING([for thread model used by GCC])
2162 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2163 AC_MSG_RESULT([$target_thread_file])
2165 if test $target_thread_file != single; then
2166 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2167 [Define if gthr-default.h exists
2168 (meaning that threading support is enabled).])
2171 glibcxx_thread_h=gthr-$target_thread_file.h
2173 dnl Check for __GTHREADS define.
2174 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2175 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2181 AC_SUBST(glibcxx_thread_h)
2185 # Check whether LC_MESSAGES is available in <locale.h>.
2186 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2188 # This file file be copied and used freely without restrictions. It can
2189 # be used in projects which are not available under the GNU Public License
2190 # but which still want to provide support for the GNU gettext functionality.
2191 # Please note that the actual code is *not* freely available.
2194 AC_DEFUN([AC_LC_MESSAGES], [
2195 AC_CHECK_HEADER(locale.h, [
2196 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2197 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2198 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2199 if test $ac_cv_val_LC_MESSAGES = yes; then
2200 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2201 [Define if LC_MESSAGES is available in <locale.h>.])
2206 # Macros from the top-level gcc directory.
2207 m4_include([../config/tls.m4])