3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
27 AC_MSG_NOTICE([OS config directory is $os_include_dir])
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
63 toplevel_srcdir=${glibcxx_srcdir}/..
64 AC_SUBST(glibcxx_builddir)
65 AC_SUBST(glibcxx_srcdir)
66 AC_SUBST(toplevel_srcdir)
68 # We use these options to decide which functions to include. They are
69 # set from the top level.
70 AC_ARG_WITH([target-subdir],
71 AC_HELP_STRING([--with-target-subdir=SUBDIR],
72 [configuring in a subdirectory]))
74 AC_ARG_WITH([cross-host],
75 AC_HELP_STRING([--with-cross-host=HOST],
76 [configuring with a cross compiler]))
79 AC_HELP_STRING([--with-newlib],
80 [assume newlib as a system C library]))
82 # We're almost certainly being configured before anything else which uses
83 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
84 # we not cache the value of CXX that we "discover" here, because it's set
85 # to something unique for us and libjava. Other target libraries need to
86 # find CXX for themselves. We yank the rug out from under the normal AC_*
87 # process by sneakily renaming the cache variable. This also lets us debug
88 # the value of "our" CXX in postmortems.
90 # We must also force CXX to /not/ be a precious variable, otherwise the
91 # wrong (non-multilib-adjusted) value will be used in multilibs. This
92 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
93 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
94 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
96 # -fno-builtin must be present here so that a non-conflicting form of
97 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
99 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
100 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
101 m4_define([_AC_ARG_VAR_PRECIOUS],[])
102 save_CXXFLAGS="$CXXFLAGS"
103 CXXFLAGS="$CXXFLAGS -fno-builtin"
106 CXXFLAGS="$save_CXXFLAGS"
107 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
111 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
112 # available). Uncomment the next line to force a particular method.
116 AC_CHECK_TOOL(AS, as)
117 AC_CHECK_TOOL(AR, ar)
118 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
122 # Set up safe default values for all subsequent AM_CONDITIONAL tests
123 # which are themselves conditionally expanded.
124 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
125 ## other macros from doing the same. This should be automated.) -pme
128 # Check for uClibc since Linux platforms use different configuration
129 # directories depending on the C library in use.
130 AC_EGREP_CPP([_using_uclibc], [
135 ], uclibc=yes, uclibc=no)
137 # Find platform-specific directories containing configuration info.
138 # Also possibly modify flags used elsewhere, as needed by the platform.
144 dnl Tests for newer compiler features, or features that are present in newer
145 dnl compiler versions but not older compiler versions still in use, should
149 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
150 dnl new inlining code or the new system_header pragma will die on -Werror.
151 dnl Leave it out by default and use maint-mode to use it.
152 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
153 dnl compiler supports it and the user has not requested debug mode.
155 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
156 # All these tests are for C++; save the language and the compiler flags.
157 # The CXXFLAGS thing is suspicious, but based on similar bits previously
158 # found in GLIBCXX_CONFIGURE.
161 ac_test_CXXFLAGS="${CXXFLAGS+set}"
162 ac_save_CXXFLAGS="$CXXFLAGS"
164 # Check for maintainer-mode bits.
165 if test x"$USE_MAINTAINER_MODE" = xno; then
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$ac_test_CXXFLAGS" = set; then
176 CXXFLAGS="$ac_save_CXXFLAGS"
178 # this is the suspicious part
181 if test x"$ac_fdsections" = x"yes"; then
182 SECTION_FLAGS='-ffunction-sections -fdata-sections'
184 AC_MSG_RESULT($ac_fdsections)
188 AC_SUBST(SECTION_FLAGS)
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
203 dnl glibcxx_gnu_ld_version (possibly)
205 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
206 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
208 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
209 # If we're not using GNU ld, then there's no point in even trying these
210 # tests. Check for that first. We should have already tested for gld
211 # by now (in libtool), but require it now just to be safe...
212 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
213 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
214 AC_REQUIRE([AC_PROG_LD])
215 AC_REQUIRE([AC_PROG_AWK])
217 # The name set by libtool depends on the version of libtool. Shame on us
218 # for depending on an impl detail, but c'est la vie. Older versions used
219 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
220 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
221 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
222 # set (hence we're using an older libtool), then set it.
223 if test x${with_gnu_ld+set} != xset; then
224 if test x${ac_cv_prog_gnu_ld+set} != xset; then
225 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
228 with_gnu_ld=$ac_cv_prog_gnu_ld
232 # Start by getting the version number. I think the libtool test already
233 # does some of this, but throws away the result.
234 if test x"$with_gnu_ld" = x"yes"; then
235 AC_MSG_CHECKING([for ld version])
237 ldver=`$LD --version 2>/dev/null | head -1 | \
238 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
240 glibcxx_gnu_ld_version=`echo $ldver | \
241 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
242 AC_MSG_RESULT($glibcxx_gnu_ld_version)
246 glibcxx_gcsections_min_ld=21602
247 if test x"$with_gnu_ld" = x"yes" &&
248 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
250 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
251 # NB: This flag only works reliably after 2.16.1. Configure tests
252 # for this are difficult, so hard wire a value that should work.
254 # All these tests are for C++, but run with the "C" compiler driver.
255 # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
256 ac_test_CFLAGS="${CFLAGS+set}"
257 ac_save_CFLAGS="$CFLAGS"
258 CFLAGS='-x c++ -Wl,--gc-sections'
260 # Check for -Wl,--gc-sections
261 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
262 AC_TRY_LINK([ int one(void) { return 1; }
263 int two(void) { return 2; }
264 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
265 if test "$ac_gcsections" = "yes"; then
268 if $CC -c conftest.c; then
269 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
270 grep "Warning: gc-sections option ignored" > /dev/null; then
274 rm -f conftest.c conftest.o conftest
276 if test "$ac_gcsections" = "yes"; then
277 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
279 AC_MSG_RESULT($ac_gcsections)
281 if test "$ac_test_CFLAGS" = set; then
282 CFLAGS="$ac_save_CFLAGS"
284 # this is the suspicious part
290 # Note this is only for shared objects.
292 if test x"$with_gnu_ld" = x"yes"; then
293 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
294 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
295 if test -n "$cxx_z_relo"; then
296 OPT_LDFLAGS="-Wl,-z,relro"
299 AC_MSG_RESULT($ac_ld_relro)
302 # Set linker optimization flags.
303 if test x"$with_gnu_ld" = x"yes"; then
304 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
307 AC_SUBST(SECTION_LDFLAGS)
308 AC_SUBST(OPT_LDFLAGS)
313 dnl Check for headers for, and arguments to, the setrlimit() function.
314 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
317 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
318 dnl various HAVE_LIMIT_* for individual limit names
320 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
321 AC_MSG_CHECKING([for RLIMIT_$1])
324 #include <sys/time.h>
325 #include <sys/resource.h>
327 [ int f = RLIMIT_$1 ; ],
328 [glibcxx_mresult=1], [glibcxx_mresult=0])
329 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
330 [Only used in build directory testsuite_hooks.h.])
331 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
335 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
336 setrlimit_have_headers=yes
337 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
339 [setrlimit_have_headers=no])
340 # If don't have the headers, then we can't run the tests now, and we
341 # won't be seeing any of these during testsuite compilation.
342 if test $setrlimit_have_headers = yes; then
343 # Can't do these in a loop, else the resulting syntax is wrong.
344 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
345 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
346 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
347 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
348 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
350 # Check for rlimit, setrlimit.
351 AC_CACHE_VAL(ac_setrlimit, [
354 #include <sys/time.h>
355 #include <sys/resource.h>
359 [ac_setrlimit=yes], [ac_setrlimit=no])
363 AC_MSG_CHECKING([for testsuite resource limits support])
364 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
366 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
367 [Define if using setrlimit to set resource limits during
372 AC_MSG_RESULT($ac_res_limits)
377 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
378 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
380 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
381 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
382 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
384 [#include <sys/stat.h>],
387 S_ISREG(buffer.st_mode);],
388 [glibcxx_cv_S_ISREG=yes],
389 [glibcxx_cv_S_ISREG=no])
391 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
393 [#include <sys/stat.h>],
396 S_IFREG & buffer.st_mode;],
397 [glibcxx_cv_S_IFREG=yes],
398 [glibcxx_cv_S_IFREG=no])
401 if test $glibcxx_cv_S_ISREG = yes; then
402 AC_DEFINE(HAVE_S_ISREG, 1,
403 [Define if S_IFREG is available in <sys/stat.h>.])
405 elif test $glibcxx_cv_S_IFREG = yes; then
406 AC_DEFINE(HAVE_S_IFREG, 1,
407 [Define if S_IFREG is available in <sys/stat.h>.])
415 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
417 AC_DEFUN([GLIBCXX_CHECK_POLL], [
418 AC_MSG_CHECKING([for poll])
419 AC_CACHE_VAL(glibcxx_cv_POLL, [
422 [struct pollfd pfd[1];
423 pfd[0].events = POLLIN;
425 [glibcxx_cv_POLL=yes],
426 [glibcxx_cv_POLL=no])
428 if test $glibcxx_cv_POLL = yes; then
429 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
431 AC_MSG_RESULT($glibcxx_cv_POLL)
436 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
438 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
439 AC_MSG_CHECKING([for writev])
440 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
442 [#include <sys/uio.h>],
443 [struct iovec iov[2];
445 [glibcxx_cv_WRITEV=yes],
446 [glibcxx_cv_WRITEV=no])
448 if test $glibcxx_cv_WRITEV = yes; then
449 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
451 AC_MSG_RESULT($glibcxx_cv_WRITEV)
456 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
458 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
459 AC_MSG_CHECKING([for int64_t])
460 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
462 [#include <stdint.h>],
464 [glibcxx_cv_INT64_T=yes],
465 [glibcxx_cv_INT64_T=no])
467 if test $glibcxx_cv_INT64_T = yes; then
468 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
470 AC_MSG_RESULT($glibcxx_cv_INT64_T)
475 dnl Check whether LFS support is available.
477 AC_DEFUN([GLIBCXX_CHECK_LFS], [
480 ac_save_CXXFLAGS="$CXXFLAGS"
481 CXXFLAGS="$CXXFLAGS -fno-exceptions"
482 AC_MSG_CHECKING([for LFS support])
483 AC_CACHE_VAL(glibcxx_cv_LFS, [
487 #include <sys/stat.h>
491 fseeko64(fp, 0, SEEK_CUR);
493 lseek64(1, 0, SEEK_CUR);
496 [glibcxx_cv_LFS=yes],
499 if test $glibcxx_cv_LFS = yes; then
500 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
502 AC_MSG_RESULT($glibcxx_cv_LFS)
503 CXXFLAGS="$ac_save_CXXFLAGS"
509 dnl Check for whether a fully dynamic basic_string implementation should
510 dnl be turned on, that does not put empty objects in per-process static
511 dnl memory (mostly useful together with shared memory allocators, see PR
512 dnl libstdc++/16612 for details).
514 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
515 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
516 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
517 dnl Where DEFAULT is either `yes' or `no'.
519 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
520 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
521 if test $enable_fully_dynamic_string = yes; then
522 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
523 [Define if a fully dynamic basic_string is wanted.])
529 dnl Does any necessary configuration of the testsuite directory. Generates
530 dnl the testsuite_hooks.h header.
532 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
536 dnl GLIBCXX_TEST_WCHAR_T
537 dnl GLIBCXX_TEST_THREAD
541 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
542 if $GLIBCXX_IS_NATIVE ; then
543 # Do checks for resource limit functions.
544 GLIBCXX_CHECK_SETRLIMIT
546 # Look for setenv, so that extended locale tests can be performed.
547 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
550 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
551 test $enable_symvers != no; then
554 enable_abi_check=no ;;
556 enable_abi_check=yes ;;
559 # Only build this as native, since automake does not understand
564 # Export file names for ABI checking.
565 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
566 AC_SUBST(baseline_dir)
571 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
575 dnl TOPLEVEL_INCLUDES
577 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
578 # Used for every C++ compile we perform.
580 -I$glibcxx_builddir/include/$host_alias \
581 -I$glibcxx_builddir/include \
582 -I$glibcxx_srcdir/libsupc++"
584 # For Canadian crosses, pick this up too.
585 if test $CANADIAN = yes; then
586 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
589 # Stuff in the actual top level. Currently only used by libsupc++ to
590 # get unwind* headers from the gcc dir.
591 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
592 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
594 # Now, export this to all the little Makefiles....
595 AC_SUBST(GLIBCXX_INCLUDES)
596 AC_SUBST(TOPLEVEL_INCLUDES)
601 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
602 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
605 dnl OPTIMIZE_CXXFLAGS
608 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
609 # Optimization flags that are probably a good idea for thrill-seekers. Just
610 # uncomment the lines below and make, everything else is ready to go...
611 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
612 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
613 AC_SUBST(OPTIMIZE_CXXFLAGS)
615 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
621 dnl All installation directory information is determined here.
625 dnl glibcxx_prefixdir
626 dnl glibcxx_toolexecdir
627 dnl glibcxx_toolexeclibdir
629 dnl Assumes cross_compiling bits already done, and with_cross_host in
632 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
633 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
634 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
635 glibcxx_toolexecdir=no
636 glibcxx_toolexeclibdir=no
637 glibcxx_prefixdir=$prefix
639 AC_MSG_CHECKING([for gxx-include-dir])
640 AC_ARG_WITH([gxx-include-dir],
641 AC_HELP_STRING([--with-gxx-include-dir=DIR],
642 [installation directory for include files]),
644 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
645 no) gxx_include_dir=no ;;
646 *) gxx_include_dir=$withval ;;
648 [gxx_include_dir=no])
649 AC_MSG_RESULT($gxx_include_dir)
651 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
652 AC_ARG_ENABLE([version-specific-runtime-libs],
653 AC_HELP_STRING([--enable-version-specific-runtime-libs],
654 [Specify that runtime libraries should be installed in a compiler-specific directory]),
655 [case "$enableval" in
656 yes) version_specific_libs=yes ;;
657 no) version_specific_libs=no ;;
658 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
660 [version_specific_libs=no])
661 AC_MSG_RESULT($version_specific_libs)
663 # Default case for install directory for include files.
664 if test $version_specific_libs = no && test $gxx_include_dir = no; then
665 gxx_include_dir='include/c++/${gcc_version}'
666 if test -n "$with_cross_host" &&
667 test x"$with_cross_host" != x"no"; then
668 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
670 gxx_include_dir='${prefix}/'"$gxx_include_dir"
674 # Version-specific runtime libs processing.
675 if test $version_specific_libs = yes; then
676 # Need the gcc compiler version to know where to install libraries
677 # and header files if --enable-version-specific-runtime-libs option
678 # is selected. FIXME: these variables are misnamed, there are
679 # no executables installed in _toolexecdir or _toolexeclibdir.
680 if test x"$gxx_include_dir" = x"no"; then
681 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
683 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
684 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
687 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
688 # Install a library built with a cross compiler in tooldir, not libdir.
689 if test x"$glibcxx_toolexecdir" = x"no"; then
690 if test -n "$with_cross_host" &&
691 test x"$with_cross_host" != x"no"; then
692 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
693 glibcxx_toolexeclibdir='${toolexecdir}/lib'
695 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
696 glibcxx_toolexeclibdir='${libdir}'
698 multi_os_directory=`$CXX -print-multi-os-directory`
699 case $multi_os_directory in
700 .) ;; # Avoid trailing /.
701 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
705 AC_MSG_CHECKING([for install location])
706 AC_MSG_RESULT($gxx_include_dir)
708 AC_SUBST(glibcxx_prefixdir)
709 AC_SUBST(gxx_include_dir)
710 AC_SUBST(glibcxx_toolexecdir)
711 AC_SUBST(glibcxx_toolexeclibdir)
717 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
718 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
719 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
721 dnl See docs/html/17_intro/configury.html#enable for documentation.
723 m4_define([GLIBCXX_ENABLE],[dnl
724 m4_define([_g_switch],[--enable-$1])dnl
725 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
726 AC_ARG_ENABLE($1,_g_help,
731 m4_bpatsubst([$5],[permit ])) ;;
732 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
733 dnl Idea for future: generate a URL pointing to
734 dnl "onlinedocs/configopts.html#whatever"
741 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
745 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
746 m4_undefine([_g_switch])dnl
747 m4_undefine([_g_help])dnl
752 dnl Check for ISO/IEC 9899:1999 "C99" support.
754 dnl --enable-c99 defines _GLIBCXX_USE_C99
755 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
756 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
757 dnl Where DEFAULT is either `yes' or `no'.
758 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
760 AC_DEFUN([GLIBCXX_ENABLE_C99], [
761 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
763 if test x"$enable_c99" = x"yes"; then
768 # Check for the existence of <math.h> functions used if C99 is enabled.
769 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
770 AC_CACHE_VAL(ac_c99_math, [
771 AC_TRY_COMPILE([#include <math.h>],
779 isgreaterequal(0.0,0.0);
781 islessequal(0.0,0.0);
782 islessgreater(0.0,0.0);
783 islessgreater(0.0,0.0);
784 isunordered(0.0,0.0);
785 ],[ac_c99_math=yes], [ac_c99_math=no])
787 AC_MSG_RESULT($ac_c99_math)
788 if test x"$ac_c99_math" = x"yes"; then
789 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
790 [Define if C99 functions or macros in <math.h> should be imported
791 in <cmath> in namespace std.])
794 # Check for the existence of <complex.h> complex math functions.
795 # This is necessary even though libstdc++ uses the builtin versions
796 # of these functions, because if the builtin cannot be used, a reference
797 # to the library function is emitted.
798 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
800 if test x"$ac_has_complex_h" = x"yes"; then
801 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
802 AC_TRY_COMPILE([#include <complex.h>],
803 [typedef __complex__ float float_type; float_type tmpf;
816 typedef __complex__ double double_type; double_type tmpd;
829 typedef __complex__ long double ld_type; ld_type tmpld;
842 ],[ac_c99_complex=yes], [ac_c99_complex=no])
844 AC_MSG_RESULT($ac_c99_complex)
845 if test x"$ac_c99_complex" = x"yes"; then
846 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
847 [Define if C99 functions in <complex.h> should be used in
848 <complex>. Using compiler builtins for these functions requires
849 corresponding C99 library functions to be present.])
852 # Check for the existence in <stdio.h> of vscanf, et. al.
853 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
854 AC_CACHE_VAL(ac_c99_stdio, [
855 AC_TRY_COMPILE([#include <stdio.h>
857 void foo(char* fmt, ...)
859 va_list args; va_start(args, fmt);
860 vfscanf(stderr, "%i", args);
862 vsnprintf(fmt, 0, "%i", args);
863 vsscanf(fmt, "%i", args);
865 [snprintf("12", 0, "%i");],
866 [ac_c99_stdio=yes], [ac_c99_stdio=no])
868 AC_MSG_RESULT($ac_c99_stdio)
870 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
871 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
872 AC_CACHE_VAL(ac_c99_stdlib, [
873 AC_TRY_COMPILE([#include <stdlib.h>],
876 strtold("gnu", &tmp);
877 strtoll("gnu", &tmp, 10);
878 strtoull("gnu", &tmp, 10);
883 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
885 AC_MSG_RESULT($ac_c99_stdlib)
887 # Check for the existence in <wchar.h> of wcstold, etc.
889 if test x"$ac_has_wchar_h" = xyes &&
890 test x"$ac_has_wctype_h" = xyes; then
891 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
892 AC_TRY_COMPILE([#include <wchar.h>
899 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
901 # Checks for wide character functions that may not be present.
902 # Injection of these is wrapped with guard macros.
903 # NB: only put functions here, instead of immediately above, if
904 # absolutely necessary.
905 AC_TRY_COMPILE([#include <wchar.h>
906 namespace test { using ::vfwscanf; } ], [],
907 [AC_DEFINE(HAVE_VFWSCANF,1,
908 [Defined if vfwscanf exists.])],[])
910 AC_TRY_COMPILE([#include <wchar.h>
911 namespace test { using ::vswscanf; } ], [],
912 [AC_DEFINE(HAVE_VSWSCANF,1,
913 [Defined if vswscanf exists.])],[])
915 AC_TRY_COMPILE([#include <wchar.h>
916 namespace test { using ::vwscanf; } ], [],
917 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
919 AC_TRY_COMPILE([#include <wchar.h>
920 namespace test { using ::wcstof; } ], [],
921 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
923 AC_TRY_COMPILE([#include <wctype.h>],
924 [ wint_t t; int i = iswblank(t);],
925 [AC_DEFINE(HAVE_ISWBLANK,1,
926 [Defined if iswblank exists.])],[])
928 AC_MSG_RESULT($ac_c99_wchar)
931 # Option parsed, now set things appropriately.
932 if test x"$ac_c99_math" = x"no" ||
933 test x"$ac_c99_complex" = x"no" ||
934 test x"$ac_c99_stdio" = x"no" ||
935 test x"$ac_c99_stdlib" = x"no" ||
936 test x"$ac_c99_wchar" = x"no"; then
939 AC_DEFINE(_GLIBCXX_USE_C99, 1,
940 [Define if C99 functions or macros from <wchar.h>, <math.h>,
941 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
947 AC_MSG_CHECKING([for fully enabled ISO C99 support])
948 AC_MSG_RESULT($enable_c99)
953 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
954 dnl facilities in Chapter 8, "C compatibility".
956 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
961 # Check for the existence of <complex.h> complex math functions used
963 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
964 ac_c99_complex_tr1=no;
965 if test x"$ac_has_complex_h" = x"yes"; then
966 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
967 AC_TRY_COMPILE([#include <complex.h>],
968 [typedef __complex__ float float_type; float_type tmpf;
975 typedef __complex__ double double_type; double_type tmpd;
982 typedef __complex__ long double ld_type; ld_type tmpld;
989 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
991 AC_MSG_RESULT($ac_c99_complex_tr1)
992 if test x"$ac_c99_complex_tr1" = x"yes"; then
993 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
994 [Define if C99 functions in <complex.h> should be used in
995 <tr1/complex>. Using compiler builtins for these functions
996 requires corresponding C99 library functions to be present.])
999 # Check for the existence of <ctype.h> functions.
1000 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1001 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1002 AC_TRY_COMPILE([#include <ctype.h>],
1006 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1008 AC_MSG_RESULT($ac_c99_ctype_tr1)
1009 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1010 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1011 [Define if C99 functions in <ctype.h> should be imported in
1012 <tr1/cctype> in namespace std::tr1.])
1015 # Check for the existence of <fenv.h> functions.
1016 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1018 if test x"$ac_has_fenv_h" = x"yes"; then
1019 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1020 AC_TRY_COMPILE([#include <fenv.h>],
1025 ret = feclearexcept(except);
1026 ret = fegetexceptflag(pflag, except);
1027 ret = feraiseexcept(except);
1028 ret = fesetexceptflag(pflag, except);
1029 ret = fetestexcept(except);
1031 ret = fesetround(mode);
1032 ret = fegetenv(penv);
1033 ret = feholdexcept(penv);
1034 ret = fesetenv(penv);
1035 ret = feupdateenv(penv);
1036 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1038 AC_MSG_RESULT($ac_c99_fenv_tr1)
1039 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1040 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1041 [Define if C99 functions in <fenv.h> should be imported in
1042 <tr1/cfenv> in namespace std::tr1.])
1045 # Check for the existence of <stdint.h> types.
1046 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1047 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1048 AC_TRY_COMPILE([#include <stdint.h>],
1049 [typedef int8_t my_int8_t;
1050 typedef int16_t my_int16_t;
1051 typedef int32_t my_int32_t;
1052 typedef int64_t my_int64_t;
1053 typedef int_fast8_t my_int_fast8_t;
1054 typedef int_fast16_t my_int_fast16_t;
1055 typedef int_fast32_t my_int_fast32_t;
1056 typedef int_fast64_t my_int_fast64_t;
1057 typedef int_least8_t my_int_least8_t;
1058 typedef int_least16_t my_int_least16_t;
1059 typedef int_least32_t my_int_least32_t;
1060 typedef int_least64_t my_int_least64_t;
1061 typedef intmax_t my_intmax_t;
1062 typedef intptr_t my_intptr_t;
1063 typedef uint8_t my_uint8_t;
1064 typedef uint16_t my_uint16_t;
1065 typedef uint32_t my_uint32_t;
1066 typedef uint64_t my_uint64_t;
1067 typedef uint_fast8_t my_uint_fast8_t;
1068 typedef uint_fast16_t my_uint_fast16_t;
1069 typedef uint_fast32_t my_uint_fast32_t;
1070 typedef uint_fast64_t my_uint_fast64_t;
1071 typedef uint_least8_t my_uint_least8_t;
1072 typedef uint_least16_t my_uint_least16_t;
1073 typedef uint_least32_t my_uint_least32_t;
1074 typedef uint_least64_t my_uint_least64_t;
1075 typedef uintmax_t my_uintmax_t;
1076 typedef uintptr_t my_uintptr_t;
1077 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1079 AC_MSG_RESULT($ac_c99_stdint_tr1)
1080 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1081 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1082 [Define if C99 types in <stdint.h> should be imported in
1083 <tr1/cstdint> in namespace std::tr1.])
1086 # Check for the existence of <math.h> functions.
1087 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1088 AC_CACHE_VAL(ac_c99_math_tr1, [
1089 AC_TRY_COMPILE([#include <math.h>],
1090 [typedef double_t my_double_t;
1091 typedef float_t my_float_t;
1105 copysignf(0.0f, 0.0f);
1106 copysignl(0.0l, 0.0l);
1123 fmaf(0.0f, 0.0f, 0.0f);
1124 fmal(0.0l, 0.0l, 0.0l);
1167 nextafter(0.0, 0.0);
1168 nextafterf(0.0f, 0.0f);
1169 nextafterl(0.0l, 0.0l);
1170 nexttoward(0.0, 0.0);
1171 nexttowardf(0.0f, 0.0f);
1172 nexttowardl(0.0l, 0.0l);
1173 remainder(0.0, 0.0);
1174 remainderf(0.0f, 0.0f);
1175 remainderl(0.0l, 0.0l);
1176 remquo(0.0, 0.0, 0);
1177 remquo(0.0f, 0.0f, 0);
1178 remquo(0.0l, 0.0l, 0);
1197 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1199 AC_MSG_RESULT($ac_c99_math_tr1)
1200 if test x"$ac_c99_math_tr1" = x"yes"; then
1201 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1202 [Define if C99 functions or macros in <math.h> should be imported
1203 in <tr1/cmath> in namespace std::tr1.])
1206 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1207 # sense if the previous check fails, per C99, 7.8/1).
1208 ac_c99_inttypes_tr1=no;
1209 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1210 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1211 AC_TRY_COMPILE([#include <inttypes.h>],
1212 [intmax_t i, numer, denom, base;
1215 intmax_t ret = imaxabs(i);
1216 imaxdiv_t dret = imaxdiv(numer, denom);
1217 ret = strtoimax(s, endptr, base);
1218 uintmax_t uret = strtoumax(s, endptr, base);
1219 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1221 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1222 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1223 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1224 [Define if C99 functions in <inttypes.h> should be imported in
1225 <tr1/cinttypes> in namespace std::tr1.])
1228 # Check for the existence of the <stdbool.h> header.
1229 AC_CHECK_HEADERS(stdbool.h)
1235 dnl Check whether "dev/random" and "dev/urandom" are available for the
1236 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1238 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1240 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1241 AC_CACHE_VAL(ac_random_tr1, [
1242 AC_TRY_RUN([#include <stdio.h>
1245 return !(fopen("/dev/random", "r")
1246 && fopen("/dev/urandom", "r"));
1249 [ac_random_tr1=yes], [ac_random_tr1=no],
1252 AC_MSG_RESULT($ac_random_tr1)
1253 if test x"$ac_random_tr1" = x"yes"; then
1254 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1255 [Define if dev/random and dev/urandom are available for
1256 the random_device of TR1 (Chapter 5.1).])
1262 dnl Check for what type of C headers to use.
1264 dnl --enable-cheaders= [does stuff].
1265 dnl --disable-cheaders [does not do anything, really].
1266 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1267 dnl Where DEFAULT is either `c' or `c_std'.
1269 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1270 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1271 [construct "C" headers for g++], [permit c|c_std])
1272 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1274 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1276 AC_SUBST(C_INCLUDE_DIR)
1277 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1278 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1279 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1284 dnl Check for which locale library to use. The choice is mapped to
1285 dnl a subdirectory of config/locale.
1287 dnl Default is generic.
1289 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1290 AC_MSG_CHECKING([for C locale to use])
1291 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1292 [use MODEL for target locale package],
1293 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1295 # If they didn't use this option switch, or if they specified --enable
1296 # with no specific model, we'll have to look for one. If they
1297 # specified --disable (???), do likewise.
1298 if test $enable_clocale = no || test $enable_clocale = yes; then
1302 # Either a known package, or "auto"
1303 enable_clocale_flag=$enable_clocale
1305 # Probe for locale support if no specific model is specified.
1306 # Default to "generic".
1307 if test $enable_clocale_flag = auto; then
1308 case ${target_os} in
1309 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1310 AC_EGREP_CPP([_GLIBCXX_ok], [
1311 #include <features.h>
1312 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1315 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1317 # Test for bugs early in glibc-2.2.x series
1318 if test $enable_clocale_flag = gnu; then
1320 #define _GNU_SOURCE 1
1323 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1324 extern __typeof(newlocale) __newlocale;
1325 extern __typeof(duplocale) __duplocale;
1326 extern __typeof(strcoll_l) __strcoll_l;
1330 const char __one[] = "Äuglein Augmen";
1331 const char __two[] = "Äuglein";
1336 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1337 loc_dup = __duplocale(loc);
1338 i = __strcoll_l(__one, __two, loc);
1339 j = __strcoll_l(__one, __two, loc_dup);
1343 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1344 [enable_clocale_flag=generic])
1347 # ... at some point put __strxfrm_l tests in as well.
1350 enable_clocale_flag=darwin
1353 enable_clocale_flag=generic
1358 # Deal with gettext issues. Default to not using it (=no) until we detect
1359 # support for it later. Let the user turn it off via --e/d, but let that
1360 # default to on for easier handling.
1363 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1367 # Set configure bits for specified locale package
1368 case ${enable_clocale_flag} in
1370 AC_MSG_RESULT(generic)
1372 CLOCALE_H=config/locale/generic/c_locale.h
1373 CLOCALE_CC=config/locale/generic/c_locale.cc
1374 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1375 CCOLLATE_CC=config/locale/generic/collate_members.cc
1376 CCTYPE_CC=config/locale/generic/ctype_members.cc
1377 CMESSAGES_H=config/locale/generic/messages_members.h
1378 CMESSAGES_CC=config/locale/generic/messages_members.cc
1379 CMONEY_CC=config/locale/generic/monetary_members.cc
1380 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1381 CTIME_H=config/locale/generic/time_members.h
1382 CTIME_CC=config/locale/generic/time_members.cc
1383 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1386 AC_MSG_RESULT(darwin or freebsd)
1388 CLOCALE_H=config/locale/generic/c_locale.h
1389 CLOCALE_CC=config/locale/generic/c_locale.cc
1390 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1391 CCOLLATE_CC=config/locale/generic/collate_members.cc
1392 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1393 CMESSAGES_H=config/locale/generic/messages_members.h
1394 CMESSAGES_CC=config/locale/generic/messages_members.cc
1395 CMONEY_CC=config/locale/generic/monetary_members.cc
1396 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1397 CTIME_H=config/locale/generic/time_members.h
1398 CTIME_CC=config/locale/generic/time_members.cc
1399 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1405 # Declare intention to use gettext, and add support for specific
1407 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1410 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1411 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1412 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1415 # Export the build objects.
1416 for ling in $ALL_LINGUAS; do \
1417 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1418 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1420 AC_SUBST(glibcxx_MOFILES)
1421 AC_SUBST(glibcxx_POFILES)
1423 CLOCALE_H=config/locale/gnu/c_locale.h
1424 CLOCALE_CC=config/locale/gnu/c_locale.cc
1425 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1426 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1427 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1428 CMESSAGES_H=config/locale/gnu/messages_members.h
1429 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1430 CMONEY_CC=config/locale/gnu/monetary_members.cc
1431 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1432 CTIME_H=config/locale/gnu/time_members.h
1433 CTIME_CC=config/locale/gnu/time_members.cc
1434 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1437 AC_MSG_RESULT(IEEE 1003.1)
1439 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1440 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1441 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1442 CCOLLATE_CC=config/locale/generic/collate_members.cc
1443 CCTYPE_CC=config/locale/generic/ctype_members.cc
1444 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1445 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1446 CMONEY_CC=config/locale/generic/monetary_members.cc
1447 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1448 CTIME_H=config/locale/generic/time_members.h
1449 CTIME_CC=config/locale/generic/time_members.cc
1450 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1454 # This is where the testsuite looks for locale catalogs, using the
1455 # -DLOCALEDIR define during testsuite compilation.
1456 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1457 AC_SUBST(glibcxx_localedir)
1459 # A standalone libintl (e.g., GNU libintl) may be in use.
1460 if test $USE_NLS = yes; then
1461 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1462 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1464 if test $USE_NLS = yes; then
1465 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1466 [Define if NLS translations are to be used.])
1471 AC_SUBST(CMESSAGES_H)
1472 AC_SUBST(CCODECVT_CC)
1473 AC_SUBST(CCOLLATE_CC)
1475 AC_SUBST(CMESSAGES_CC)
1477 AC_SUBST(CNUMERIC_CC)
1480 AC_SUBST(CLOCALE_CC)
1481 AC_SUBST(CLOCALE_INTERNAL_H)
1486 dnl Check for which std::allocator base class to use. The choice is
1487 dnl mapped from a subdirectory of include/ext.
1491 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1492 AC_MSG_CHECKING([for std::allocator base class])
1493 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1494 [use KIND for target std::allocator base],
1495 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1497 # If they didn't use this option switch, or if they specified --enable
1498 # with no specific model, we'll have to look for one. If they
1499 # specified --disable (???), do likewise.
1500 if test $enable_libstdcxx_allocator = no ||
1501 test $enable_libstdcxx_allocator = yes;
1503 enable_libstdcxx_allocator=auto
1506 # Either a known package, or "auto". Auto implies the default choice
1507 # for a particular platform.
1508 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1510 # Probe for host-specific support if no specific model is specified.
1512 if test $enable_libstdcxx_allocator_flag = auto; then
1513 case ${target_os} in
1514 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1515 enable_libstdcxx_allocator_flag=new
1518 enable_libstdcxx_allocator_flag=new
1522 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1525 # Set configure bits for specified locale package
1526 case ${enable_libstdcxx_allocator_flag} in
1528 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1529 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1532 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1533 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1536 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1537 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1540 ALLOCATOR_H=config/allocator/new_allocator_base.h
1541 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1544 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1545 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1549 AC_SUBST(ALLOCATOR_H)
1550 AC_SUBST(ALLOCATOR_NAME)
1555 dnl Check for whether the Boost-derived checks should be turned on.
1557 dnl --enable-concept-checks turns them on.
1558 dnl --disable-concept-checks leaves them off.
1559 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1560 dnl Where DEFAULT is either `yes' or `no'.
1562 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1563 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1564 if test $enable_concept_checks = yes; then
1565 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1566 [Define to use concept checking code from the boost libraries.])
1572 dnl Check for which I/O library to use: stdio, or something specific.
1574 dnl Default is stdio.
1576 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1577 AC_MSG_CHECKING([for underlying I/O to use])
1578 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1579 [use target-specific I/O package], [permit stdio])
1581 # Now that libio has been removed, you can have any color you want as long
1582 # as it's black. This is one big no-op until other packages are added, but
1583 # showing the framework never hurts.
1584 case ${enable_cstdio} in
1586 CSTDIO_H=config/io/c_io_stdio.h
1587 BASIC_FILE_H=config/io/basic_file_stdio.h
1588 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1589 AC_MSG_RESULT(stdio)
1594 AC_SUBST(BASIC_FILE_H)
1595 AC_SUBST(BASIC_FILE_CC)
1600 dnl Check for "unusual" flags to pass to the compiler while building.
1602 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1603 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1604 dnl --disable-cxx-flags passes nothing.
1605 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1606 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1607 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1608 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1609 dnl If "default flags" is an empty string, the effect is the same
1610 dnl as --disable or --enable=no.
1612 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1613 AC_MSG_CHECKING([for extra compiler flags for building])
1614 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1615 [pass compiler FLAGS when building library],
1616 [case "x$enable_cxx_flags" in
1617 xno | x) enable_cxx_flags= ;;
1619 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1622 # Run through flags (either default or command-line) and set anything
1623 # extra (e.g., #defines) that must accompany particular g++ options.
1624 if test -n "$enable_cxx_flags"; then
1625 for f in $enable_cxx_flags; do
1629 *) # and we're trying to pass /what/ exactly?
1630 AC_MSG_ERROR([compiler flags start with a -]) ;;
1635 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1636 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1637 AC_SUBST(EXTRA_CXX_FLAGS)
1642 dnl Check to see if debugging libraries are to be built.
1644 dnl --enable-libstdcxx-debug
1645 dnl builds a separate set of debugging libraries in addition to the
1646 dnl normal (shared, static) libstdc++ binaries.
1648 dnl --disable-libstdcxx-debug
1649 dnl builds only one (non-debug) version of libstdc++.
1651 dnl --enable-libstdcxx-debug-flags=FLAGS
1652 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1654 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1655 dnl Where DEFAULT is either `yes' or `no'.
1657 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1658 AC_MSG_CHECKING([for additional debug build])
1659 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1660 AC_MSG_RESULT($enable_libstdcxx_debug)
1661 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1666 dnl Check for explicit debug flags.
1668 dnl --enable-libstdcxx-debug-flags='-O1'
1669 dnl is a general method for passing flags to be used when
1670 dnl building debug libraries with --enable-debug.
1672 dnl --disable-libstdcxx-debug-flags does nothing.
1673 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1674 dnl If "default flags" is an empty string, the effect is the same
1675 dnl as --disable or --enable=no.
1677 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1678 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1679 [pass compiler FLAGS when building debug library],
1680 [case "x$enable_libstdcxx_debug_flags" in
1681 xno | x) enable_libstdcxx_debug_flags= ;;
1683 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1686 # Option parsed, now set things appropriately
1687 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1688 AC_SUBST(DEBUG_FLAGS)
1690 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1695 dnl Check if the user only wants a freestanding library implementation.
1697 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1698 dnl installing only the headers required by [17.4.1.3] and the language
1699 dnl support library. More than that will be built (to keep the Makefiles
1700 dnl conveniently clean), but not installed.
1703 dnl is_hosted (yes/no)
1706 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1708 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1709 AC_ARG_ENABLE([hosted-libstdcxx],
1710 AC_HELP_STRING([--disable-hosted-libstdcxx],
1711 [only build freestanding C++ runtime support]),,
1714 enable_hosted_libstdcxx=no
1717 enable_hosted_libstdcxx=yes
1720 if test "$enable_hosted_libstdcxx" = no; then
1721 AC_MSG_NOTICE([Only freestanding libraries will be built])
1725 enable_libstdcxx_pch=no
1730 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1731 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1732 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1737 dnl Check for template specializations for the 'long long' type.
1738 dnl The result determines only whether 'long long' I/O is enabled; things
1739 dnl like numeric_limits<> specializations are always available.
1741 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1742 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1743 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1744 dnl Where DEFAULT is either `yes' or `no'.
1746 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1747 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1748 if test $enable_long_long = yes; then
1749 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1750 [Define if code specialized for long long should be used.])
1752 AC_MSG_CHECKING([for enabled long long specializations])
1753 AC_MSG_RESULT([$enable_long_long])
1758 dnl Check for template specializations for the 'wchar_t' type.
1760 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1761 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1762 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1763 dnl Where DEFAULT is either `yes' or `no'.
1765 dnl Necessary support must also be present.
1767 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1768 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1770 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1771 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1772 AC_MSG_CHECKING([for mbstate_t])
1773 AC_TRY_COMPILE([#include <wchar.h>],
1774 [mbstate_t teststate;],
1775 have_mbstate_t=yes, have_mbstate_t=no)
1776 AC_MSG_RESULT($have_mbstate_t)
1777 if test x"$have_mbstate_t" = xyes; then
1778 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1781 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1783 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1785 if test x"$enable_wchar_t" = x"yes"; then
1790 if test x"$ac_has_wchar_h" = xyes &&
1791 test x"$ac_has_wctype_h" = xyes; then
1792 AC_TRY_COMPILE([#include <wchar.h>
1853 ],[],[], [enable_wchar_t=no])
1861 if test x"$enable_wchar_t" = x"yes"; then
1862 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1863 [Define if code specialized for wchar_t should be used.])
1866 AC_MSG_CHECKING([for enabled wchar_t specializations])
1867 AC_MSG_RESULT([$enable_wchar_t])
1872 dnl Check to see if building and using a C++ precompiled header can be done.
1874 dnl --enable-libstdcxx-pch=yes
1875 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1876 dnl may work, after some light-hearted attempts to puzzle out compiler
1877 dnl support, flip bits on in include/Makefile.am
1879 dnl --disable-libstdcxx-pch
1880 dnl turns off attempts to use or build stdc++.h.gch.
1883 dnl glibcxx_PCHFLAGS
1885 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1886 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1887 if test $enable_libstdcxx_pch = yes; then
1888 AC_CACHE_CHECK([for compiler with PCH support],
1889 [glibcxx_cv_prog_CXX_pch],
1890 [ac_save_CXXFLAGS="$CXXFLAGS"
1891 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1894 echo '#include <math.h>' > conftest.h
1895 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1896 -o conftest.h.gch 1>&5 2>&1 &&
1897 echo '#error "pch failed"' > conftest.h &&
1898 echo '#include "conftest.h"' > conftest.cc &&
1899 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1901 glibcxx_cv_prog_CXX_pch=yes
1903 glibcxx_cv_prog_CXX_pch=no
1906 CXXFLAGS=$ac_save_CXXFLAGS
1909 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1912 AC_MSG_CHECKING([for enabled PCH])
1913 AC_MSG_RESULT([$enable_libstdcxx_pch])
1915 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1916 if test $enable_libstdcxx_pch = yes; then
1917 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
1921 AC_SUBST(glibcxx_PCHFLAGS)
1926 dnl Check for atomic builtins.
1928 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
1930 dnl This checks to see if the host supports the compiler-generated
1931 dnl builtins for atomic operations. Note, this is intended to be an
1932 dnl all-or-nothing switch, so all the atomic operations that are used
1933 dnl should be checked.
1936 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
1937 dnl see: CHECK_SYNC_FETCH_AND_ADD
1940 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
1942 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
1943 AC_MSG_CHECKING([for atomic builtins])
1947 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1948 cat > conftest.$ac_ext << EOF
1949 [#]line __oline__ "configure"
1952 // NB: _Atomic_word not necessarily int.
1953 typedef int atomic_type;
1956 const atomic_type c3(0);
1957 if (__sync_fetch_and_add(&c1, c2) == c3)
1964 old_CXXFLAGS="$CXXFLAGS"
1966 if AC_TRY_EVAL(ac_compile); then
1967 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
1968 enable_atomic_builtins=no
1970 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
1971 [Define if builtin atomic operations are supported on this host.])
1972 enable_atomic_builtins=yes
1973 atomicity_dir=cpu/generic/atomicity_builtins
1976 CXXFLAGS="$old_CXXFLAGS"
1979 # Now, if still generic, set to mutex.
1980 if test $atomicity_dir = "cpu/generic" ; then
1981 atomicity_dir=cpu/generic/atomicity_mutex
1984 AC_MSG_RESULT($enable_atomic_builtins)
1989 dnl Check for exception handling support. If an explicit enable/disable
1990 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1991 dnl target may or may not support call frame exceptions.
1993 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1994 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1995 dnl Neither one forces an attempt at detection.
1998 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2000 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2001 AC_MSG_CHECKING([for exception model to use])
2004 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2005 [force use of builtin_setjmp for exceptions],
2006 [permit yes|no|auto])
2008 if test $enable_sjlj_exceptions = auto; then
2009 # Botheration. Now we've got to detect the exception model. Link tests
2010 # against libgcc.a are problematic since we've not been given proper -L
2011 # bits for single-tree newlib and libgloss.
2013 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2014 cat > conftest.$ac_ext << EOF
2015 [#]line __oline__ "configure"
2024 old_CXXFLAGS="$CXXFLAGS"
2026 if AC_TRY_EVAL(ac_compile); then
2027 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2028 enable_sjlj_exceptions=yes
2029 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2030 enable_sjlj_exceptions=no
2031 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2032 enable_sjlj_exceptions=no
2035 CXXFLAGS="$old_CXXFLAGS"
2039 # This is a tad weird, for hysterical raisins. We have to map
2040 # enable/disable to two different models.
2041 case $enable_sjlj_exceptions in
2043 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2044 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2045 ac_exception_model_name=sjlj
2048 ac_exception_model_name="call frame"
2051 AC_MSG_ERROR([unable to detect exception model])
2055 AC_MSG_RESULT($ac_exception_model_name)
2060 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2062 dnl --enable-visibility enables attempt to use visibility attributes.
2063 dnl --disable-visibility turns off all use of visibility attributes.
2064 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2065 dnl Where DEFAULT is 'yes'.
2067 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2068 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2070 if test x$enable_visibility = xyes ; then
2071 dnl all hail libgfortran
2072 dnl Check whether the target supports hidden visibility.
2073 AC_CACHE_CHECK([whether the target supports hidden visibility],
2074 have_attribute_visibility, [
2075 save_CFLAGS="$CFLAGS"
2076 CFLAGS="$CFLAGS -Werror"
2077 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2078 [], have_attribute_visibility=yes,
2079 have_attribute_visibility=no)
2080 CFLAGS="$save_CFLAGS"])
2081 if test $have_attribute_visibility = no; then
2082 enable_visibility=no
2086 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2087 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2092 dnl Add version tags to symbols in shared library (or not), additionally
2093 dnl marking other symbols as private/local (or not).
2095 dnl --enable-symvers=style adds a version script to the linker call when
2096 dnl creating the shared library. The choice of version script is
2097 dnl controlled by 'style'.
2098 dnl --disable-symvers does not.
2099 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2100 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2101 dnl choose a default style based on linker characteristics. Passing
2102 dnl 'no' disables versioning.
2104 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2106 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2107 [enables symbol versioning of the shared library],
2108 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2110 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2111 # don't know enough about $LD to do tricks...
2112 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2114 # Turn a 'yes' into a suitable default.
2115 if test x$enable_symvers = xyes ; then
2116 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2119 if test $with_gnu_ld = yes ; then
2122 case ${target_os} in
2124 enable_symvers=darwin ;;
2126 enable_symvers=no ;;
2132 # Check to see if 'darwin' or 'darwin-export' can win.
2133 if test x$enable_symvers = xdarwin-export ; then
2134 enable_symvers=darwin
2137 # Check to see if 'gnu' can win.
2138 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2139 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2140 AC_MSG_CHECKING([for shared libgcc])
2141 ac_save_CFLAGS="$CFLAGS"
2143 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2144 CFLAGS="$ac_save_CFLAGS"
2145 if test $glibcxx_shared_libgcc = no; then
2146 cat > conftest.c <<EOF
2147 int main (void) { return 0; }
2150 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2151 -shared -shared-libgcc -o conftest.so \
2152 conftest.c -v 2>&1 >/dev/null \
2153 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2155 rm -f conftest.c conftest.so
2156 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2157 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2158 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2159 CFLAGS="$ac_save_CFLAGS"
2162 AC_MSG_RESULT($glibcxx_shared_libgcc)
2164 # For GNU ld, we need at least this version. The format is described in
2165 # GLIBCXX_CHECK_LINKER_FEATURES above.
2166 glibcxx_min_gnu_ld_version=21400
2168 # If no shared libgcc, can't win.
2169 if test $glibcxx_shared_libgcc != yes; then
2170 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2171 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2172 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2174 elif test $with_gnu_ld != yes ; then
2176 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2177 AC_MSG_WARN([=== you are not using the GNU linker.])
2178 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2180 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2181 # The right tools, the right setup, but too old. Fallbacks?
2182 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2183 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2184 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2185 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2186 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2191 # Everything parsed; figure out what file to use.
2192 case $enable_symvers in
2194 SYMVER_FILE=config/abi/pre/none.ver
2197 SYMVER_FILE=config/abi/pre/gnu.ver
2198 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2199 [Define to use GNU versioning in the shared library.])
2201 gnu-versioned-namespace)
2202 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2203 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2204 [Define to use GNU namespace versioning in the shared library.])
2207 SYMVER_FILE=config/abi/pre/gnu.ver
2208 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2209 [Define to use darwin versioning in the shared library.])
2213 if test x$enable_symvers != xno ; then
2214 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2215 [Define to use symbol versioning in the shared library.])
2218 AC_SUBST(SYMVER_FILE)
2219 AC_SUBST(port_specific_symbol_files)
2220 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2221 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2222 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2223 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2224 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2226 # Now, set up compatibility support, if any.
2227 # In addition, need this to deal with std::size_t mangling in
2228 # src/compatibility.cc. In a perfect world, could use
2229 # typeid(std::size_t).name()[0] to do direct substitution.
2230 AC_MSG_CHECKING([for size_t as unsigned int])
2231 ac_save_CFLAGS="$CFLAGS"
2233 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2234 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2235 CFLAGS=$ac_save_CFLAGS
2236 if test "$glibcxx_size_t_is_i" = yes; then
2237 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2239 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2241 AC_MSG_CHECKING([for ptrdiff_t as int])
2242 ac_save_CFLAGS="$CFLAGS"
2244 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2245 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2246 CFLAGS=$ac_save_CFLAGS
2247 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2248 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2250 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2255 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2256 dnl We must stage the required headers so that they will be installed
2257 dnl with the library (unlike libgcc, the STL implementation is provided
2258 dnl solely within headers). Since we must not inject random user-space
2259 dnl macro names into user-provided C++ code, we first stage into <file>-in
2260 dnl and process to <file> with an output command. The reason for a two-
2261 dnl stage process here is to correctly handle $srcdir!=$objdir without
2262 dnl having to write complex code (the sed commands to clean the macro
2263 dnl namespace are complex and fragile enough as it is). We must also
2264 dnl add a relative path so that -I- is supported properly.
2267 dnl glibcxx_thread_h
2270 dnl HAVE_GTHR_DEFAULT
2272 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2273 AC_MSG_CHECKING([for thread model used by GCC])
2274 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2275 AC_MSG_RESULT([$target_thread_file])
2277 if test $target_thread_file != single; then
2278 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2279 [Define if gthr-default.h exists
2280 (meaning that threading support is enabled).])
2283 glibcxx_thread_h=gthr-$target_thread_file.h
2285 dnl Check for __GTHREADS define.
2286 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2287 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2293 AC_SUBST(glibcxx_thread_h)
2297 # Check whether LC_MESSAGES is available in <locale.h>.
2298 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2300 # This file file be copied and used freely without restrictions. It can
2301 # be used in projects which are not available under the GNU Public License
2302 # but which still want to provide support for the GNU gettext functionality.
2303 # Please note that the actual code is *not* freely available.
2306 AC_DEFUN([AC_LC_MESSAGES], [
2307 AC_CHECK_HEADER(locale.h, [
2308 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2309 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2310 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2311 if test $ac_cv_val_LC_MESSAGES = yes; then
2312 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2313 [Define if LC_MESSAGES is available in <locale.h>.])
2318 # Macros from the top-level gcc directory.
2319 m4_include([../config/tls.m4])