3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
27 AC_MSG_NOTICE([OS config directory is $os_include_dir])
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
63 toplevel_srcdir=${glibcxx_srcdir}/..
64 AC_SUBST(glibcxx_builddir)
65 AC_SUBST(glibcxx_srcdir)
66 AC_SUBST(toplevel_srcdir)
68 # We use these options to decide which functions to include. They are
69 # set from the top level.
70 AC_ARG_WITH([target-subdir],
71 AC_HELP_STRING([--with-target-subdir=SUBDIR],
72 [configuring in a subdirectory]))
74 AC_ARG_WITH([cross-host],
75 AC_HELP_STRING([--with-cross-host=HOST],
76 [configuring with a cross compiler]))
79 AC_HELP_STRING([--with-newlib],
80 [assume newlib as a system C library]))
82 # We're almost certainly being configured before anything else which uses
83 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
84 # we not cache the value of CXX that we "discover" here, because it's set
85 # to something unique for us and libjava. Other target libraries need to
86 # find CXX for themselves. We yank the rug out from under the normal AC_*
87 # process by sneakily renaming the cache variable. This also lets us debug
88 # the value of "our" CXX in postmortems.
90 # We must also force CXX to /not/ be a precious variable, otherwise the
91 # wrong (non-multilib-adjusted) value will be used in multilibs. This
92 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
93 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
94 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
96 # -fno-builtin must be present here so that a non-conflicting form of
97 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
99 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
100 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
101 m4_define([_AC_ARG_VAR_PRECIOUS],[])
102 save_CXXFLAGS="$CXXFLAGS"
103 CXXFLAGS="$CXXFLAGS -fno-builtin"
106 CXXFLAGS="$save_CXXFLAGS"
107 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
111 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
112 # available). Uncomment the next line to force a particular method.
116 AC_CHECK_TOOL(AS, as)
117 AC_CHECK_TOOL(AR, ar)
118 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
122 # Set up safe default values for all subsequent AM_CONDITIONAL tests
123 # which are themselves conditionally expanded.
124 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
125 ## other macros from doing the same. This should be automated.) -pme
128 # Check for uClibc since Linux platforms use different configuration
129 # directories depending on the C library in use.
130 AC_EGREP_CPP([_using_uclibc], [
135 ], uclibc=yes, uclibc=no)
137 # Find platform-specific directories containing configuration info.
138 # Also possibly modify flags used elsewhere, as needed by the platform.
144 dnl Tests for newer compiler features, or features that are present in newer
145 dnl compiler versions but not older compiler versions still in use, should
149 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
150 dnl new inlining code or the new system_header pragma will die on -Werror.
151 dnl Leave it out by default and use maint-mode to use it.
152 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
153 dnl compiler supports it and the user has not requested debug mode.
155 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
156 # All these tests are for C++; save the language and the compiler flags.
157 # The CXXFLAGS thing is suspicious, but based on similar bits previously
158 # found in GLIBCXX_CONFIGURE.
161 ac_test_CXXFLAGS="${CXXFLAGS+set}"
162 ac_save_CXXFLAGS="$CXXFLAGS"
164 # Check for maintainer-mode bits.
165 if test x"$USE_MAINTAINER_MODE" = xno; then
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$ac_test_CXXFLAGS" = set; then
176 CXXFLAGS="$ac_save_CXXFLAGS"
178 # this is the suspicious part
181 if test x"$ac_fdsections" = x"yes"; then
182 SECTION_FLAGS='-ffunction-sections -fdata-sections'
184 AC_MSG_RESULT($ac_fdsections)
188 AC_SUBST(SECTION_FLAGS)
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
203 dnl glibcxx_gnu_ld_version (possibly)
205 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
206 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
208 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
209 # If we're not using GNU ld, then there's no point in even trying these
210 # tests. Check for that first. We should have already tested for gld
211 # by now (in libtool), but require it now just to be safe...
212 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
213 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
214 AC_REQUIRE([AC_PROG_LD])
215 AC_REQUIRE([AC_PROG_AWK])
217 # The name set by libtool depends on the version of libtool. Shame on us
218 # for depending on an impl detail, but c'est la vie. Older versions used
219 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
220 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
221 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
222 # set (hence we're using an older libtool), then set it.
223 if test x${with_gnu_ld+set} != xset; then
224 if test x${ac_cv_prog_gnu_ld+set} != xset; then
225 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
228 with_gnu_ld=$ac_cv_prog_gnu_ld
232 # Start by getting the version number. I think the libtool test already
233 # does some of this, but throws away the result.
234 if test x"$with_gnu_ld" = x"yes"; then
235 AC_MSG_CHECKING([for ld version])
237 ldver=`$LD --version 2>/dev/null | head -1 | \
238 sed -e 's/GNU ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\3/'`
240 glibcxx_gnu_ld_version=`echo $ldver | \
241 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
242 AC_MSG_RESULT($glibcxx_gnu_ld_version)
246 glibcxx_gcsections_min_ld=21602
247 if test x"$with_gnu_ld" = x"yes" &&
248 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
250 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
251 # NB: This flag only works reliably after 2.16.1. Configure tests
252 # for this are difficult, so hard wire a value that should work.
254 # All these tests are for C++, but run with the "C" compiler driver.
255 # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
256 ac_test_CFLAGS="${CFLAGS+set}"
257 ac_save_CFLAGS="$CFLAGS"
258 CFLAGS='-x c++ -Wl,--gc-sections'
260 # Check for -Wl,--gc-sections
261 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
262 AC_TRY_LINK([ int one(void) { return 1; }
263 int two(void) { return 2; }
264 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
265 if test "$ac_gcsections" = "yes"; then
268 if $CC -c conftest.c; then
269 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
270 grep "Warning: gc-sections option ignored" > /dev/null; then
274 rm -f conftest.c conftest.o conftest
276 if test "$ac_gcsections" = "yes"; then
277 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
279 AC_MSG_RESULT($ac_gcsections)
281 if test "$ac_test_CFLAGS" = set; then
282 CFLAGS="$ac_save_CFLAGS"
284 # this is the suspicious part
290 # Note this is only for shared objects.
292 if test x"$with_gnu_ld" = x"yes"; then
293 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
294 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
295 if test -n "$cxx_z_relo"; then
296 OPT_LDFLAGS="-Wl,-z,relro"
299 AC_MSG_RESULT($ac_ld_relro)
302 # Set linker optimization flags.
303 if test x"$with_gnu_ld" = x"yes"; then
304 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
307 AC_SUBST(SECTION_LDFLAGS)
308 AC_SUBST(OPT_LDFLAGS)
313 dnl Check 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(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
799 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
801 if test x"$ac_has_complex_h" = x"yes"; then
802 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
803 AC_TRY_COMPILE([#include <complex.h>],
804 [typedef __complex__ float float_type; float_type tmpf;
817 typedef __complex__ double double_type; double_type tmpd;
830 typedef __complex__ long double ld_type; ld_type tmpld;
843 ],[ac_c99_complex=yes], [ac_c99_complex=no])
845 AC_MSG_RESULT($ac_c99_complex)
846 if test x"$ac_c99_complex" = x"yes"; then
847 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
848 [Define if C99 functions in <complex.h> should be used in
849 <complex>. Using compiler builtins for these functions requires
850 corresponding C99 library functions to be present.])
853 # Check for the existence in <stdio.h> of vscanf, et. al.
854 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
855 AC_CACHE_VAL(ac_c99_stdio, [
856 AC_TRY_COMPILE([#include <stdio.h>
858 void foo(char* fmt, ...)
860 va_list args; va_start(args, fmt);
861 vfscanf(stderr, "%i", args);
863 vsnprintf(fmt, 0, "%i", args);
864 vsscanf(fmt, "%i", args);
866 [snprintf("12", 0, "%i");],
867 [ac_c99_stdio=yes], [ac_c99_stdio=no])
869 AC_MSG_RESULT($ac_c99_stdio)
871 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
872 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
873 AC_CACHE_VAL(ac_c99_stdlib, [
874 AC_TRY_COMPILE([#include <stdlib.h>],
877 strtold("gnu", &tmp);
878 strtoll("gnu", &tmp, 10);
879 strtoull("gnu", &tmp, 10);
884 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
886 AC_MSG_RESULT($ac_c99_stdlib)
888 # Check for the existence in <wchar.h> of wcstold, etc.
890 if test x"$ac_has_wchar_h" = xyes &&
891 test x"$ac_has_wctype_h" = xyes; then
892 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
893 AC_TRY_COMPILE([#include <wchar.h>
900 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
902 # Checks for wide character functions that may not be present.
903 # Injection of these is wrapped with guard macros.
904 # NB: only put functions here, instead of immediately above, if
905 # absolutely necessary.
906 AC_TRY_COMPILE([#include <wchar.h>
907 namespace test { using ::vfwscanf; } ], [],
908 [AC_DEFINE(HAVE_VFWSCANF,1,
909 [Defined if vfwscanf exists.])],[])
911 AC_TRY_COMPILE([#include <wchar.h>
912 namespace test { using ::vswscanf; } ], [],
913 [AC_DEFINE(HAVE_VSWSCANF,1,
914 [Defined if vswscanf exists.])],[])
916 AC_TRY_COMPILE([#include <wchar.h>
917 namespace test { using ::vwscanf; } ], [],
918 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
920 AC_TRY_COMPILE([#include <wchar.h>
921 namespace test { using ::wcstof; } ], [],
922 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
924 AC_TRY_COMPILE([#include <wctype.h>],
925 [ wint_t t; int i = iswblank(t);],
926 [AC_DEFINE(HAVE_ISWBLANK,1,
927 [Defined if iswblank exists.])],[])
929 AC_MSG_RESULT($ac_c99_wchar)
932 # Option parsed, now set things appropriately.
933 if test x"$ac_c99_math" = x"no" ||
934 test x"$ac_c99_complex" = x"no" ||
935 test x"$ac_c99_stdio" = x"no" ||
936 test x"$ac_c99_stdlib" = x"no" ||
937 test x"$ac_c99_wchar" = x"no"; then
940 AC_DEFINE(_GLIBCXX_USE_C99, 1,
941 [Define if C99 functions or macros from <wchar.h>, <math.h>,
942 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
948 AC_MSG_CHECKING([for fully enabled ISO C99 support])
949 AC_MSG_RESULT($enable_c99)
954 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
955 dnl facilities in Chapter 8, "C compatibility".
957 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
962 # Check for the existence of <complex.h> complex math functions used
964 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
965 ac_c99_complex_tr1=no;
966 if test x"$ac_has_complex_h" = x"yes"; then
967 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
968 AC_TRY_COMPILE([#include <complex.h>],
969 [typedef __complex__ float float_type; float_type tmpf;
976 typedef __complex__ double double_type; double_type tmpd;
983 typedef __complex__ long double ld_type; ld_type tmpld;
990 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
992 AC_MSG_RESULT($ac_c99_complex_tr1)
993 if test x"$ac_c99_complex_tr1" = x"yes"; then
994 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
995 [Define if C99 functions in <complex.h> should be used in
996 <tr1/complex>. Using compiler builtins for these functions
997 requires corresponding C99 library functions to be present.])
1000 # Check for the existence of <ctype.h> functions.
1001 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1002 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1003 AC_TRY_COMPILE([#include <ctype.h>],
1007 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1009 AC_MSG_RESULT($ac_c99_ctype_tr1)
1010 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1011 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1012 [Define if C99 functions in <ctype.h> should be imported in
1013 <tr1/cctype> in namespace std::tr1.])
1016 # Check for the existence of <fenv.h> functions.
1017 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1019 if test x"$ac_has_fenv_h" = x"yes"; then
1020 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1021 AC_TRY_COMPILE([#include <fenv.h>],
1026 ret = feclearexcept(except);
1027 ret = fegetexceptflag(pflag, except);
1028 ret = feraiseexcept(except);
1029 ret = fesetexceptflag(pflag, except);
1030 ret = fetestexcept(except);
1032 ret = fesetround(mode);
1033 ret = fegetenv(penv);
1034 ret = feholdexcept(penv);
1035 ret = fesetenv(penv);
1036 ret = feupdateenv(penv);
1037 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1039 AC_MSG_RESULT($ac_c99_fenv_tr1)
1040 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1041 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1042 [Define if C99 functions in <fenv.h> should be imported in
1043 <tr1/cfenv> in namespace std::tr1.])
1046 # Check for the existence of <stdint.h> types.
1047 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1048 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1049 AC_TRY_COMPILE([#include <stdint.h>],
1050 [typedef int8_t my_int8_t;
1051 typedef int16_t my_int16_t;
1052 typedef int32_t my_int32_t;
1053 typedef int64_t my_int64_t;
1054 typedef int_fast8_t my_int_fast8_t;
1055 typedef int_fast16_t my_int_fast16_t;
1056 typedef int_fast32_t my_int_fast32_t;
1057 typedef int_fast64_t my_int_fast64_t;
1058 typedef int_least8_t my_int_least8_t;
1059 typedef int_least16_t my_int_least16_t;
1060 typedef int_least32_t my_int_least32_t;
1061 typedef int_least64_t my_int_least64_t;
1062 typedef intmax_t my_intmax_t;
1063 typedef intptr_t my_intptr_t;
1064 typedef uint8_t my_uint8_t;
1065 typedef uint16_t my_uint16_t;
1066 typedef uint32_t my_uint32_t;
1067 typedef uint64_t my_uint64_t;
1068 typedef uint_fast8_t my_uint_fast8_t;
1069 typedef uint_fast16_t my_uint_fast16_t;
1070 typedef uint_fast32_t my_uint_fast32_t;
1071 typedef uint_fast64_t my_uint_fast64_t;
1072 typedef uint_least8_t my_uint_least8_t;
1073 typedef uint_least16_t my_uint_least16_t;
1074 typedef uint_least32_t my_uint_least32_t;
1075 typedef uint_least64_t my_uint_least64_t;
1076 typedef uintmax_t my_uintmax_t;
1077 typedef uintptr_t my_uintptr_t;
1078 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1080 AC_MSG_RESULT($ac_c99_stdint_tr1)
1081 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1082 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1083 [Define if C99 types in <stdint.h> should be imported in
1084 <tr1/cstdint> in namespace std::tr1.])
1087 # Check for the existence of <math.h> functions.
1088 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1089 AC_CACHE_VAL(ac_c99_math_tr1, [
1090 AC_TRY_COMPILE([#include <math.h>],
1091 [typedef double_t my_double_t;
1092 typedef float_t my_float_t;
1106 copysignf(0.0f, 0.0f);
1107 copysignl(0.0l, 0.0l);
1124 fmaf(0.0f, 0.0f, 0.0f);
1125 fmal(0.0l, 0.0l, 0.0l);
1168 nextafter(0.0, 0.0);
1169 nextafterf(0.0f, 0.0f);
1170 nextafterl(0.0l, 0.0l);
1171 nexttoward(0.0, 0.0);
1172 nexttowardf(0.0f, 0.0f);
1173 nexttowardl(0.0l, 0.0l);
1174 remainder(0.0, 0.0);
1175 remainderf(0.0f, 0.0f);
1176 remainderl(0.0l, 0.0l);
1177 remquo(0.0, 0.0, 0);
1178 remquo(0.0f, 0.0f, 0);
1179 remquo(0.0l, 0.0l, 0);
1198 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1200 AC_MSG_RESULT($ac_c99_math_tr1)
1201 if test x"$ac_c99_math_tr1" = x"yes"; then
1202 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1203 [Define if C99 functions or macros in <math.h> should be imported
1204 in <tr1/cmath> in namespace std::tr1.])
1207 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1208 # sense if the previous check fails, per C99, 7.8/1).
1209 ac_c99_inttypes_tr1=no;
1210 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1211 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1212 AC_TRY_COMPILE([#include <inttypes.h>],
1213 [intmax_t i, numer, denom, base;
1216 intmax_t ret = imaxabs(i);
1217 imaxdiv_t dret = imaxdiv(numer, denom);
1218 ret = strtoimax(s, endptr, base);
1219 uintmax_t uret = strtoumax(s, endptr, base);
1220 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1222 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1223 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1224 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1225 [Define if C99 functions in <inttypes.h> should be imported in
1226 <tr1/cinttypes> in namespace std::tr1.])
1229 # Check for the existence of the <stdbool.h> header.
1230 AC_CHECK_HEADERS(stdbool.h)
1236 dnl Check whether "dev/random" and "dev/urandom" are available for the
1237 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1239 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1241 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1242 AC_CACHE_VAL(ac_random_tr1, [
1243 AC_TRY_RUN([#include <stdio.h>
1246 return !(fopen("/dev/random", "r")
1247 && fopen("/dev/urandom", "r"));
1250 [ac_random_tr1=yes], [ac_random_tr1=no],
1253 AC_MSG_RESULT($ac_random_tr1)
1254 if test x"$ac_random_tr1" = x"yes"; then
1255 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1256 [Define if dev/random and dev/urandom are available for
1257 the random_device of TR1 (Chapter 5.1).])
1263 dnl Check for what type of C headers to use.
1265 dnl --enable-cheaders= [does stuff].
1266 dnl --disable-cheaders [does not do anything, really].
1267 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1268 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1270 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1271 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1272 [construct "C" headers for g++], [permit c|c_std|c_global])
1273 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1275 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1277 # Allow overrides to configure.host here.
1278 if test $enable_cheaders = c_global; then
1282 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1286 AC_SUBST(C_INCLUDE_DIR)
1287 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1288 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1289 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1290 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1291 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1296 dnl Check for which locale library to use. The choice is mapped to
1297 dnl a subdirectory of config/locale.
1299 dnl Default is generic.
1301 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1302 AC_MSG_CHECKING([for C locale to use])
1303 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1304 [use MODEL for target locale package],
1305 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1307 # If they didn't use this option switch, or if they specified --enable
1308 # with no specific model, we'll have to look for one. If they
1309 # specified --disable (???), do likewise.
1310 if test $enable_clocale = no || test $enable_clocale = yes; then
1314 # Either a known package, or "auto"
1315 enable_clocale_flag=$enable_clocale
1317 # Probe for locale support if no specific model is specified.
1318 # Default to "generic".
1319 if test $enable_clocale_flag = auto; then
1320 case ${target_os} in
1321 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1322 AC_EGREP_CPP([_GLIBCXX_ok], [
1323 #include <features.h>
1324 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1327 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1329 # Test for bugs early in glibc-2.2.x series
1330 if test $enable_clocale_flag = gnu; then
1332 #define _GNU_SOURCE 1
1335 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1336 extern __typeof(newlocale) __newlocale;
1337 extern __typeof(duplocale) __duplocale;
1338 extern __typeof(strcoll_l) __strcoll_l;
1342 const char __one[] = "Äuglein Augmen";
1343 const char __two[] = "Äuglein";
1348 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1349 loc_dup = __duplocale(loc);
1350 i = __strcoll_l(__one, __two, loc);
1351 j = __strcoll_l(__one, __two, loc_dup);
1355 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1356 [enable_clocale_flag=generic])
1359 # ... at some point put __strxfrm_l tests in as well.
1362 enable_clocale_flag=darwin
1365 enable_clocale_flag=generic
1370 # Deal with gettext issues. Default to not using it (=no) until we detect
1371 # support for it later. Let the user turn it off via --e/d, but let that
1372 # default to on for easier handling.
1375 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1379 # Set configure bits for specified locale package
1380 case ${enable_clocale_flag} in
1382 AC_MSG_RESULT(generic)
1384 CLOCALE_H=config/locale/generic/c_locale.h
1385 CLOCALE_CC=config/locale/generic/c_locale.cc
1386 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1387 CCOLLATE_CC=config/locale/generic/collate_members.cc
1388 CCTYPE_CC=config/locale/generic/ctype_members.cc
1389 CMESSAGES_H=config/locale/generic/messages_members.h
1390 CMESSAGES_CC=config/locale/generic/messages_members.cc
1391 CMONEY_CC=config/locale/generic/monetary_members.cc
1392 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1393 CTIME_H=config/locale/generic/time_members.h
1394 CTIME_CC=config/locale/generic/time_members.cc
1395 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1398 AC_MSG_RESULT(darwin or freebsd)
1400 CLOCALE_H=config/locale/generic/c_locale.h
1401 CLOCALE_CC=config/locale/generic/c_locale.cc
1402 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1403 CCOLLATE_CC=config/locale/generic/collate_members.cc
1404 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1405 CMESSAGES_H=config/locale/generic/messages_members.h
1406 CMESSAGES_CC=config/locale/generic/messages_members.cc
1407 CMONEY_CC=config/locale/generic/monetary_members.cc
1408 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1409 CTIME_H=config/locale/generic/time_members.h
1410 CTIME_CC=config/locale/generic/time_members.cc
1411 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1417 # Declare intention to use gettext, and add support for specific
1419 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1422 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1423 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1424 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1427 # Export the build objects.
1428 for ling in $ALL_LINGUAS; do \
1429 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1430 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1432 AC_SUBST(glibcxx_MOFILES)
1433 AC_SUBST(glibcxx_POFILES)
1435 CLOCALE_H=config/locale/gnu/c_locale.h
1436 CLOCALE_CC=config/locale/gnu/c_locale.cc
1437 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1438 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1439 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1440 CMESSAGES_H=config/locale/gnu/messages_members.h
1441 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1442 CMONEY_CC=config/locale/gnu/monetary_members.cc
1443 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1444 CTIME_H=config/locale/gnu/time_members.h
1445 CTIME_CC=config/locale/gnu/time_members.cc
1446 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1449 AC_MSG_RESULT(IEEE 1003.1)
1451 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1452 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1453 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1454 CCOLLATE_CC=config/locale/generic/collate_members.cc
1455 CCTYPE_CC=config/locale/generic/ctype_members.cc
1456 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1457 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1458 CMONEY_CC=config/locale/generic/monetary_members.cc
1459 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1460 CTIME_H=config/locale/generic/time_members.h
1461 CTIME_CC=config/locale/generic/time_members.cc
1462 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1466 # This is where the testsuite looks for locale catalogs, using the
1467 # -DLOCALEDIR define during testsuite compilation.
1468 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1469 AC_SUBST(glibcxx_localedir)
1471 # A standalone libintl (e.g., GNU libintl) may be in use.
1472 if test $USE_NLS = yes; then
1473 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1474 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1476 if test $USE_NLS = yes; then
1477 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1478 [Define if NLS translations are to be used.])
1483 AC_SUBST(CMESSAGES_H)
1484 AC_SUBST(CCODECVT_CC)
1485 AC_SUBST(CCOLLATE_CC)
1487 AC_SUBST(CMESSAGES_CC)
1489 AC_SUBST(CNUMERIC_CC)
1492 AC_SUBST(CLOCALE_CC)
1493 AC_SUBST(CLOCALE_INTERNAL_H)
1498 dnl Check for which std::allocator base class to use. The choice is
1499 dnl mapped from a subdirectory of include/ext.
1503 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1504 AC_MSG_CHECKING([for std::allocator base class])
1505 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1506 [use KIND for target std::allocator base],
1507 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1509 # If they didn't use this option switch, or if they specified --enable
1510 # with no specific model, we'll have to look for one. If they
1511 # specified --disable (???), do likewise.
1512 if test $enable_libstdcxx_allocator = no ||
1513 test $enable_libstdcxx_allocator = yes;
1515 enable_libstdcxx_allocator=auto
1518 # Either a known package, or "auto". Auto implies the default choice
1519 # for a particular platform.
1520 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1522 # Probe for host-specific support if no specific model is specified.
1524 if test $enable_libstdcxx_allocator_flag = auto; then
1525 case ${target_os} in
1526 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1527 enable_libstdcxx_allocator_flag=new
1530 enable_libstdcxx_allocator_flag=new
1534 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1537 # Set configure bits for specified locale package
1538 case ${enable_libstdcxx_allocator_flag} in
1540 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1541 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1544 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1545 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1548 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1549 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1552 ALLOCATOR_H=config/allocator/new_allocator_base.h
1553 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1556 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1557 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1561 AC_SUBST(ALLOCATOR_H)
1562 AC_SUBST(ALLOCATOR_NAME)
1567 dnl Check for whether the Boost-derived checks should be turned on.
1569 dnl --enable-concept-checks turns them on.
1570 dnl --disable-concept-checks leaves them off.
1571 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1572 dnl Where DEFAULT is either `yes' or `no'.
1574 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1575 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1576 if test $enable_concept_checks = yes; then
1577 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1578 [Define to use concept checking code from the boost libraries.])
1584 dnl Check for which I/O library to use: stdio, or something specific.
1586 dnl Default is stdio.
1588 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1589 AC_MSG_CHECKING([for underlying I/O to use])
1590 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1591 [use target-specific I/O package], [permit stdio])
1593 # Now that libio has been removed, you can have any color you want as long
1594 # as it's black. This is one big no-op until other packages are added, but
1595 # showing the framework never hurts.
1596 case ${enable_cstdio} in
1598 CSTDIO_H=config/io/c_io_stdio.h
1599 BASIC_FILE_H=config/io/basic_file_stdio.h
1600 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1601 AC_MSG_RESULT(stdio)
1606 AC_SUBST(BASIC_FILE_H)
1607 AC_SUBST(BASIC_FILE_CC)
1612 dnl Check for "unusual" flags to pass to the compiler while building.
1614 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1615 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1616 dnl --disable-cxx-flags passes nothing.
1617 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1618 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1619 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1620 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1621 dnl If "default flags" is an empty string, the effect is the same
1622 dnl as --disable or --enable=no.
1624 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1625 AC_MSG_CHECKING([for extra compiler flags for building])
1626 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1627 [pass compiler FLAGS when building library],
1628 [case "x$enable_cxx_flags" in
1629 xno | x) enable_cxx_flags= ;;
1631 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1634 # Run through flags (either default or command-line) and set anything
1635 # extra (e.g., #defines) that must accompany particular g++ options.
1636 if test -n "$enable_cxx_flags"; then
1637 for f in $enable_cxx_flags; do
1641 *) # and we're trying to pass /what/ exactly?
1642 AC_MSG_ERROR([compiler flags start with a -]) ;;
1647 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1648 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1649 AC_SUBST(EXTRA_CXX_FLAGS)
1654 dnl Check to see if debugging libraries are to be built.
1656 dnl --enable-libstdcxx-debug
1657 dnl builds a separate set of debugging libraries in addition to the
1658 dnl normal (shared, static) libstdc++ binaries.
1660 dnl --disable-libstdcxx-debug
1661 dnl builds only one (non-debug) version of libstdc++.
1663 dnl --enable-libstdcxx-debug-flags=FLAGS
1664 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1666 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1667 dnl Where DEFAULT is either `yes' or `no'.
1669 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1670 AC_MSG_CHECKING([for additional debug build])
1671 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1672 AC_MSG_RESULT($enable_libstdcxx_debug)
1673 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1678 dnl Check for explicit debug flags.
1680 dnl --enable-libstdcxx-debug-flags='-O1'
1681 dnl is a general method for passing flags to be used when
1682 dnl building debug libraries with --enable-debug.
1684 dnl --disable-libstdcxx-debug-flags does nothing.
1685 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1686 dnl If "default flags" is an empty string, the effect is the same
1687 dnl as --disable or --enable=no.
1689 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1690 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1691 [pass compiler FLAGS when building debug library],
1692 [case "x$enable_libstdcxx_debug_flags" in
1693 xno | x) enable_libstdcxx_debug_flags= ;;
1695 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1698 # Option parsed, now set things appropriately
1699 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1700 AC_SUBST(DEBUG_FLAGS)
1702 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1707 dnl Check if the user only wants a freestanding library implementation.
1709 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1710 dnl installing only the headers required by [17.4.1.3] and the language
1711 dnl support library. More than that will be built (to keep the Makefiles
1712 dnl conveniently clean), but not installed.
1715 dnl is_hosted (yes/no)
1718 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1720 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1721 AC_ARG_ENABLE([hosted-libstdcxx],
1722 AC_HELP_STRING([--disable-hosted-libstdcxx],
1723 [only build freestanding C++ runtime support]),,
1726 enable_hosted_libstdcxx=no
1729 enable_hosted_libstdcxx=yes
1732 if test "$enable_hosted_libstdcxx" = no; then
1733 AC_MSG_NOTICE([Only freestanding libraries will be built])
1737 enable_libstdcxx_pch=no
1742 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1743 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1744 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1749 dnl Check for template specializations for the 'long long' type.
1750 dnl The result determines only whether 'long long' I/O is enabled; things
1751 dnl like numeric_limits<> specializations are always available.
1753 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1754 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1755 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1756 dnl Where DEFAULT is either `yes' or `no'.
1758 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1759 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1760 if test $enable_long_long = yes; then
1761 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1762 [Define if code specialized for long long should be used.])
1764 AC_MSG_CHECKING([for enabled long long specializations])
1765 AC_MSG_RESULT([$enable_long_long])
1770 dnl Check for template specializations for the 'wchar_t' type.
1772 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1773 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1774 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1775 dnl Where DEFAULT is either `yes' or `no'.
1777 dnl Necessary support must also be present.
1779 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1780 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1782 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1783 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1784 AC_MSG_CHECKING([for mbstate_t])
1785 AC_TRY_COMPILE([#include <wchar.h>],
1786 [mbstate_t teststate;],
1787 have_mbstate_t=yes, have_mbstate_t=no)
1788 AC_MSG_RESULT($have_mbstate_t)
1789 if test x"$have_mbstate_t" = xyes; then
1790 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1793 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1795 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1797 if test x"$enable_wchar_t" = x"yes"; then
1802 if test x"$ac_has_wchar_h" = xyes &&
1803 test x"$ac_has_wctype_h" = xyes; then
1804 AC_TRY_COMPILE([#include <wchar.h>
1865 ],[],[], [enable_wchar_t=no])
1873 if test x"$enable_wchar_t" = x"yes"; then
1874 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1875 [Define if code specialized for wchar_t should be used.])
1878 AC_MSG_CHECKING([for enabled wchar_t specializations])
1879 AC_MSG_RESULT([$enable_wchar_t])
1884 dnl Check to see if building and using a C++ precompiled header can be done.
1886 dnl --enable-libstdcxx-pch=yes
1887 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1888 dnl may work, after some light-hearted attempts to puzzle out compiler
1889 dnl support, flip bits on in include/Makefile.am
1891 dnl --disable-libstdcxx-pch
1892 dnl turns off attempts to use or build stdc++.h.gch.
1895 dnl glibcxx_PCHFLAGS
1897 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1898 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1899 if test $enable_libstdcxx_pch = yes; then
1900 AC_CACHE_CHECK([for compiler with PCH support],
1901 [glibcxx_cv_prog_CXX_pch],
1902 [ac_save_CXXFLAGS="$CXXFLAGS"
1903 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1906 echo '#include <math.h>' > conftest.h
1907 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1908 -o conftest.h.gch 1>&5 2>&1 &&
1909 echo '#error "pch failed"' > conftest.h &&
1910 echo '#include "conftest.h"' > conftest.cc &&
1911 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1913 glibcxx_cv_prog_CXX_pch=yes
1915 glibcxx_cv_prog_CXX_pch=no
1918 CXXFLAGS=$ac_save_CXXFLAGS
1921 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1924 AC_MSG_CHECKING([for enabled PCH])
1925 AC_MSG_RESULT([$enable_libstdcxx_pch])
1927 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1928 if test $enable_libstdcxx_pch = yes; then
1929 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
1933 AC_SUBST(glibcxx_PCHFLAGS)
1938 dnl Check for atomic builtins.
1940 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
1942 dnl This checks to see if the host supports the compiler-generated
1943 dnl builtins for atomic operations. Note, this is intended to be an
1944 dnl all-or-nothing switch, so all the atomic operations that are used
1945 dnl should be checked.
1948 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
1949 dnl see: CHECK_SYNC_FETCH_AND_ADD
1952 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
1954 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
1955 AC_MSG_CHECKING([for atomic builtins])
1959 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1960 cat > conftest.$ac_ext << EOF
1961 [#]line __oline__ "configure"
1964 // NB: _Atomic_word not necessarily int.
1965 typedef int atomic_type;
1968 const atomic_type c3(0);
1969 if (__sync_fetch_and_add(&c1, c2) == c3)
1976 old_CXXFLAGS="$CXXFLAGS"
1978 if AC_TRY_EVAL(ac_compile); then
1979 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
1980 enable_atomic_builtins=no
1982 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
1983 [Define if builtin atomic operations are supported on this host.])
1984 enable_atomic_builtins=yes
1985 atomicity_dir=cpu/generic/atomicity_builtins
1988 CXXFLAGS="$old_CXXFLAGS"
1991 # Now, if still generic, set to mutex.
1992 if test $atomicity_dir = "cpu/generic" ; then
1993 atomicity_dir=cpu/generic/atomicity_mutex
1996 AC_MSG_RESULT($enable_atomic_builtins)
2001 dnl Check for exception handling support. If an explicit enable/disable
2002 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2003 dnl target may or may not support call frame exceptions.
2005 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2006 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2007 dnl Neither one forces an attempt at detection.
2010 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2012 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2013 AC_MSG_CHECKING([for exception model to use])
2016 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2017 [force use of builtin_setjmp for exceptions],
2018 [permit yes|no|auto])
2020 if test $enable_sjlj_exceptions = auto; then
2021 # Botheration. Now we've got to detect the exception model. Link tests
2022 # against libgcc.a are problematic since we've not been given proper -L
2023 # bits for single-tree newlib and libgloss.
2025 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2026 cat > conftest.$ac_ext << EOF
2027 [#]line __oline__ "configure"
2036 old_CXXFLAGS="$CXXFLAGS"
2038 if AC_TRY_EVAL(ac_compile); then
2039 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2040 enable_sjlj_exceptions=yes
2041 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2042 enable_sjlj_exceptions=no
2043 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2044 enable_sjlj_exceptions=no
2047 CXXFLAGS="$old_CXXFLAGS"
2051 # This is a tad weird, for hysterical raisins. We have to map
2052 # enable/disable to two different models.
2053 case $enable_sjlj_exceptions in
2055 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2056 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2057 ac_exception_model_name=sjlj
2060 ac_exception_model_name="call frame"
2063 AC_MSG_ERROR([unable to detect exception model])
2067 AC_MSG_RESULT($ac_exception_model_name)
2072 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2074 dnl --enable-visibility enables attempt to use visibility attributes.
2075 dnl --disable-visibility turns off all use of visibility attributes.
2076 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2077 dnl Where DEFAULT is 'yes'.
2079 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2080 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2082 if test x$enable_visibility = xyes ; then
2083 dnl all hail libgfortran
2084 dnl Check whether the target supports hidden visibility.
2085 AC_CACHE_CHECK([whether the target supports hidden visibility],
2086 have_attribute_visibility, [
2087 save_CFLAGS="$CFLAGS"
2088 CFLAGS="$CFLAGS -Werror"
2089 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2090 [], have_attribute_visibility=yes,
2091 have_attribute_visibility=no)
2092 CFLAGS="$save_CFLAGS"])
2093 if test $have_attribute_visibility = no; then
2094 enable_visibility=no
2098 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2099 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2104 dnl Add version tags to symbols in shared library (or not), additionally
2105 dnl marking other symbols as private/local (or not).
2107 dnl --enable-symvers=style adds a version script to the linker call when
2108 dnl creating the shared library. The choice of version script is
2109 dnl controlled by 'style'.
2110 dnl --disable-symvers does not.
2111 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2112 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2113 dnl choose a default style based on linker characteristics. Passing
2114 dnl 'no' disables versioning.
2116 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2118 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2119 [enables symbol versioning of the shared library],
2120 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2122 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2123 # don't know enough about $LD to do tricks...
2124 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2126 # Turn a 'yes' into a suitable default.
2127 if test x$enable_symvers = xyes ; then
2128 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2131 if test $with_gnu_ld = yes ; then
2134 case ${target_os} in
2136 enable_symvers=darwin ;;
2138 enable_symvers=no ;;
2144 # Check to see if 'darwin' or 'darwin-export' can win.
2145 if test x$enable_symvers = xdarwin-export ; then
2146 enable_symvers=darwin
2149 # Check to see if 'gnu' can win.
2150 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2151 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2152 AC_MSG_CHECKING([for shared libgcc])
2153 ac_save_CFLAGS="$CFLAGS"
2155 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2156 CFLAGS="$ac_save_CFLAGS"
2157 if test $glibcxx_shared_libgcc = no; then
2158 cat > conftest.c <<EOF
2159 int main (void) { return 0; }
2162 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2163 -shared -shared-libgcc -o conftest.so \
2164 conftest.c -v 2>&1 >/dev/null \
2165 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2167 rm -f conftest.c conftest.so
2168 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2169 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2170 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2171 CFLAGS="$ac_save_CFLAGS"
2174 AC_MSG_RESULT($glibcxx_shared_libgcc)
2176 # For GNU ld, we need at least this version. The format is described in
2177 # GLIBCXX_CHECK_LINKER_FEATURES above.
2178 glibcxx_min_gnu_ld_version=21400
2180 # If no shared libgcc, can't win.
2181 if test $glibcxx_shared_libgcc != yes; then
2182 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2183 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2184 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2186 elif test $with_gnu_ld != yes ; then
2188 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2189 AC_MSG_WARN([=== you are not using the GNU linker.])
2190 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2192 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2193 # The right tools, the right setup, but too old. Fallbacks?
2194 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2195 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2196 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2197 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2198 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2203 # Everything parsed; figure out what file to use.
2204 case $enable_symvers in
2206 SYMVER_FILE=config/abi/pre/none.ver
2209 SYMVER_FILE=config/abi/pre/gnu.ver
2210 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2211 [Define to use GNU versioning in the shared library.])
2213 gnu-versioned-namespace)
2214 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2215 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2216 [Define to use GNU namespace versioning in the shared library.])
2219 SYMVER_FILE=config/abi/pre/gnu.ver
2220 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2221 [Define to use darwin versioning in the shared library.])
2225 if test x$enable_symvers != xno ; then
2226 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2227 [Define to use symbol versioning in the shared library.])
2230 AC_SUBST(SYMVER_FILE)
2231 AC_SUBST(port_specific_symbol_files)
2232 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2233 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2234 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2235 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2236 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2238 # Now, set up compatibility support, if any.
2239 # In addition, need this to deal with std::size_t mangling in
2240 # src/compatibility.cc. In a perfect world, could use
2241 # typeid(std::size_t).name()[0] to do direct substitution.
2242 AC_MSG_CHECKING([for size_t as unsigned int])
2243 ac_save_CFLAGS="$CFLAGS"
2245 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2246 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2247 CFLAGS=$ac_save_CFLAGS
2248 if test "$glibcxx_size_t_is_i" = yes; then
2249 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2251 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2253 AC_MSG_CHECKING([for ptrdiff_t as int])
2254 ac_save_CFLAGS="$CFLAGS"
2256 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2257 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2258 CFLAGS=$ac_save_CFLAGS
2259 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2260 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2262 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2267 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2268 dnl We must stage the required headers so that they will be installed
2269 dnl with the library (unlike libgcc, the STL implementation is provided
2270 dnl solely within headers). Since we must not inject random user-space
2271 dnl macro names into user-provided C++ code, we first stage into <file>-in
2272 dnl and process to <file> with an output command. The reason for a two-
2273 dnl stage process here is to correctly handle $srcdir!=$objdir without
2274 dnl having to write complex code (the sed commands to clean the macro
2275 dnl namespace are complex and fragile enough as it is). We must also
2276 dnl add a relative path so that -I- is supported properly.
2279 dnl glibcxx_thread_h
2282 dnl HAVE_GTHR_DEFAULT
2284 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2285 AC_MSG_CHECKING([for thread model used by GCC])
2286 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2287 AC_MSG_RESULT([$target_thread_file])
2289 if test $target_thread_file != single; then
2290 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2291 [Define if gthr-default.h exists
2292 (meaning that threading support is enabled).])
2295 glibcxx_thread_h=gthr-$target_thread_file.h
2297 dnl Check for __GTHREADS define.
2298 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2299 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2305 AC_SUBST(glibcxx_thread_h)
2309 # Check whether LC_MESSAGES is available in <locale.h>.
2310 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2312 # This file file be copied and used freely without restrictions. It can
2313 # be used in projects which are not available under the GNU Public License
2314 # but which still want to provide support for the GNU gettext functionality.
2315 # Please note that the actual code is *not* freely available.
2318 AC_DEFUN([AC_LC_MESSAGES], [
2319 AC_CHECK_HEADER(locale.h, [
2320 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2321 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2322 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2323 if test $ac_cv_val_LC_MESSAGES = yes; then
2324 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2325 [Define if LC_MESSAGES is available in <locale.h>.])
2330 # Macros from the top-level gcc directory.
2331 m4_include([../config/tls.m4])