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"$USE_MAINTAINER_MODE" = xno; then
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$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 $glibcxx_gcsections_min_ld ; then
250 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
251 # NB: This flag only works reliably after 2.16.1. Configure tests
252 # for this are difficult, so hard wire a value that should work.
254 ac_test_CFLAGS="${CFLAGS+set}"
255 ac_save_CFLAGS="$CFLAGS"
256 CFLAGS='-Wl,--gc-sections'
258 # Check for -Wl,--gc-sections
259 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
260 AC_TRY_LINK([ int one(void) { return 1; }
261 int two(void) { return 2; }
262 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
263 if test "$ac_gcsections" = "yes"; then
266 if $CC -c conftest.c; then
267 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
268 grep "Warning: gc-sections option ignored" > /dev/null; then
272 rm -f conftest.c conftest.o conftest
274 if test "$ac_gcsections" = "yes"; then
275 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
277 AC_MSG_RESULT($ac_gcsections)
279 if test "$ac_test_CFLAGS" = set; then
280 CFLAGS="$ac_save_CFLAGS"
282 # this is the suspicious part
288 # Note this is only for shared objects.
290 if test x"$with_gnu_ld" = x"yes"; then
291 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
292 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
293 if test -n "$cxx_z_relo"; then
294 OPT_LDFLAGS="-Wl,-z,relro"
297 AC_MSG_RESULT($ac_ld_relro)
300 # Set linker optimization flags.
301 if test x"$with_gnu_ld" = x"yes"; then
302 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
305 AC_SUBST(SECTION_LDFLAGS)
306 AC_SUBST(OPT_LDFLAGS)
311 dnl Check for headers for, and arguments to, the setrlimit() function.
312 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
315 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
316 dnl various HAVE_LIMIT_* for individual limit names
318 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
319 AC_MSG_CHECKING([for RLIMIT_$1])
322 #include <sys/time.h>
323 #include <sys/resource.h>
325 [ int f = RLIMIT_$1 ; ],
326 [glibcxx_mresult=1], [glibcxx_mresult=0])
327 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
328 [Only used in build directory testsuite_hooks.h.])
329 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
333 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
334 setrlimit_have_headers=yes
335 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
337 [setrlimit_have_headers=no])
338 # If don't have the headers, then we can't run the tests now, and we
339 # won't be seeing any of these during testsuite compilation.
340 if test $setrlimit_have_headers = yes; then
341 # Can't do these in a loop, else the resulting syntax is wrong.
342 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
343 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
344 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
345 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
346 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
348 # Check for rlimit, setrlimit.
349 AC_CACHE_VAL(ac_setrlimit, [
352 #include <sys/time.h>
353 #include <sys/resource.h>
357 [ac_setrlimit=yes], [ac_setrlimit=no])
361 AC_MSG_CHECKING([for testsuite resource limits support])
362 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
364 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
365 [Define if using setrlimit to set resource limits during
370 AC_MSG_RESULT($ac_res_limits)
375 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
376 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
378 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
379 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
380 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
382 [#include <sys/stat.h>],
385 S_ISREG(buffer.st_mode);],
386 [glibcxx_cv_S_ISREG=yes],
387 [glibcxx_cv_S_ISREG=no])
389 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
391 [#include <sys/stat.h>],
394 S_IFREG & buffer.st_mode;],
395 [glibcxx_cv_S_IFREG=yes],
396 [glibcxx_cv_S_IFREG=no])
399 if test $glibcxx_cv_S_ISREG = yes; then
400 AC_DEFINE(HAVE_S_ISREG, 1,
401 [Define if S_IFREG is available in <sys/stat.h>.])
403 elif test $glibcxx_cv_S_IFREG = yes; then
404 AC_DEFINE(HAVE_S_IFREG, 1,
405 [Define if S_IFREG is available in <sys/stat.h>.])
413 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
415 AC_DEFUN([GLIBCXX_CHECK_POLL], [
416 AC_MSG_CHECKING([for poll])
417 AC_CACHE_VAL(glibcxx_cv_POLL, [
420 [struct pollfd pfd[1];
421 pfd[0].events = POLLIN;
423 [glibcxx_cv_POLL=yes],
424 [glibcxx_cv_POLL=no])
426 if test $glibcxx_cv_POLL = yes; then
427 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
429 AC_MSG_RESULT($glibcxx_cv_POLL)
434 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
436 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
437 AC_MSG_CHECKING([for writev])
438 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
440 [#include <sys/uio.h>],
441 [struct iovec iov[2];
443 [glibcxx_cv_WRITEV=yes],
444 [glibcxx_cv_WRITEV=no])
446 if test $glibcxx_cv_WRITEV = yes; then
447 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
449 AC_MSG_RESULT($glibcxx_cv_WRITEV)
454 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
456 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
457 AC_MSG_CHECKING([for int64_t])
458 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
460 [#include <stdint.h>],
462 [glibcxx_cv_INT64_T=yes],
463 [glibcxx_cv_INT64_T=no])
465 if test $glibcxx_cv_INT64_T = yes; then
466 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
468 AC_MSG_RESULT($glibcxx_cv_INT64_T)
473 dnl Check whether LFS support is available.
475 AC_DEFUN([GLIBCXX_CHECK_LFS], [
478 ac_save_CXXFLAGS="$CXXFLAGS"
479 CXXFLAGS="$CXXFLAGS -fno-exceptions"
480 AC_MSG_CHECKING([for LFS support])
481 AC_CACHE_VAL(glibcxx_cv_LFS, [
485 #include <sys/stat.h>
489 fseeko64(fp, 0, SEEK_CUR);
491 lseek64(1, 0, SEEK_CUR);
494 [glibcxx_cv_LFS=yes],
497 if test $glibcxx_cv_LFS = yes; then
498 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
500 AC_MSG_RESULT($glibcxx_cv_LFS)
501 CXXFLAGS="$ac_save_CXXFLAGS"
507 dnl Check for whether a fully dynamic basic_string implementation should
508 dnl be turned on, that does not put empty objects in per-process static
509 dnl memory (mostly useful together with shared memory allocators, see PR
510 dnl libstdc++/16612 for details).
512 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
513 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
514 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
515 dnl Where DEFAULT is either `yes' or `no'.
517 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
518 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
519 if test $enable_fully_dynamic_string = yes; then
520 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
521 [Define if a fully dynamic basic_string is wanted.])
527 dnl Does any necessary configuration of the testsuite directory. Generates
528 dnl the testsuite_hooks.h header.
530 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
534 dnl GLIBCXX_TEST_WCHAR_T
535 dnl GLIBCXX_TEST_THREAD
539 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
540 if $GLIBCXX_IS_NATIVE ; then
541 # Do checks for resource limit functions.
542 GLIBCXX_CHECK_SETRLIMIT
544 # Look for setenv, so that extended locale tests can be performed.
545 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
548 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
549 test $enable_symvers != no; then
552 enable_abi_check=no ;;
554 enable_abi_check=yes ;;
557 # Only build this as native, since automake does not understand
562 # Export file names for ABI checking.
563 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
564 AC_SUBST(baseline_dir)
569 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
573 dnl TOPLEVEL_INCLUDES
575 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
576 # Used for every C++ compile we perform.
578 -I$glibcxx_builddir/include/$host_alias \
579 -I$glibcxx_builddir/include \
580 -I$glibcxx_srcdir/libsupc++"
582 # For Canadian crosses, pick this up too.
583 if test $CANADIAN = yes; then
584 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
587 # Stuff in the actual top level. Currently only used by libsupc++ to
588 # get unwind* headers from the gcc dir.
589 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
590 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
592 # Now, export this to all the little Makefiles....
593 AC_SUBST(GLIBCXX_INCLUDES)
594 AC_SUBST(TOPLEVEL_INCLUDES)
599 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
600 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
603 dnl OPTIMIZE_CXXFLAGS
606 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
607 # Optimization flags that are probably a good idea for thrill-seekers. Just
608 # uncomment the lines below and make, everything else is ready to go...
609 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
610 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
611 AC_SUBST(OPTIMIZE_CXXFLAGS)
613 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
619 dnl All installation directory information is determined here.
623 dnl glibcxx_prefixdir
624 dnl glibcxx_toolexecdir
625 dnl glibcxx_toolexeclibdir
627 dnl Assumes cross_compiling bits already done, and with_cross_host in
630 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
631 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
632 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
633 glibcxx_toolexecdir=no
634 glibcxx_toolexeclibdir=no
635 glibcxx_prefixdir=$prefix
637 AC_MSG_CHECKING([for gxx-include-dir])
638 AC_ARG_WITH([gxx-include-dir],
639 AC_HELP_STRING([--with-gxx-include-dir=DIR],
640 [installation directory for include files]),
642 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
643 no) gxx_include_dir=no ;;
644 *) gxx_include_dir=$withval ;;
646 [gxx_include_dir=no])
647 AC_MSG_RESULT($gxx_include_dir)
649 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
650 AC_ARG_ENABLE([version-specific-runtime-libs],
651 AC_HELP_STRING([--enable-version-specific-runtime-libs],
652 [Specify that runtime libraries should be installed in a compiler-specific directory]),
653 [case "$enableval" in
654 yes) version_specific_libs=yes ;;
655 no) version_specific_libs=no ;;
656 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
658 [version_specific_libs=no])
659 AC_MSG_RESULT($version_specific_libs)
661 # Default case for install directory for include files.
662 if test $version_specific_libs = no && test $gxx_include_dir = no; then
663 gxx_include_dir='include/c++/${gcc_version}'
664 if test -n "$with_cross_host" &&
665 test x"$with_cross_host" != x"no"; then
666 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
668 gxx_include_dir='${prefix}/'"$gxx_include_dir"
672 # Version-specific runtime libs processing.
673 if test $version_specific_libs = yes; then
674 # Need the gcc compiler version to know where to install libraries
675 # and header files if --enable-version-specific-runtime-libs option
676 # is selected. FIXME: these variables are misnamed, there are
677 # no executables installed in _toolexecdir or _toolexeclibdir.
678 if test x"$gxx_include_dir" = x"no"; then
679 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
681 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
682 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
685 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
686 # Install a library built with a cross compiler in tooldir, not libdir.
687 if test x"$glibcxx_toolexecdir" = x"no"; then
688 if test -n "$with_cross_host" &&
689 test x"$with_cross_host" != x"no"; then
690 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
691 glibcxx_toolexeclibdir='${toolexecdir}/lib'
693 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
694 glibcxx_toolexeclibdir='${libdir}'
696 multi_os_directory=`$CXX -print-multi-os-directory`
697 case $multi_os_directory in
698 .) ;; # Avoid trailing /.
699 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
703 AC_MSG_CHECKING([for install location])
704 AC_MSG_RESULT($gxx_include_dir)
706 AC_SUBST(glibcxx_prefixdir)
707 AC_SUBST(gxx_include_dir)
708 AC_SUBST(glibcxx_toolexecdir)
709 AC_SUBST(glibcxx_toolexeclibdir)
715 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
716 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
717 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
719 dnl See docs/html/17_intro/configury.html#enable for documentation.
721 m4_define([GLIBCXX_ENABLE],[dnl
722 m4_define([_g_switch],[--enable-$1])dnl
723 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
724 AC_ARG_ENABLE($1,_g_help,
729 m4_bpatsubst([$5],[permit ])) ;;
730 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
731 dnl Idea for future: generate a URL pointing to
732 dnl "onlinedocs/configopts.html#whatever"
739 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
743 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
744 m4_undefine([_g_switch])dnl
745 m4_undefine([_g_help])dnl
750 dnl Check for ISO/IEC 9899:1999 "C99" support.
752 dnl --enable-c99 defines _GLIBCXX_USE_C99
753 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
754 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
755 dnl Where DEFAULT is either `yes' or `no'.
756 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
758 AC_DEFUN([GLIBCXX_ENABLE_C99], [
759 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
761 if test x"$enable_c99" = x"yes"; then
766 # Use -fno-exceptions so that the C driver can link these tests without
767 # hitting undefined references to personality routines.
768 ac_save_CXXFLAGS="$CXXFLAGS"
770 ac_save_gcc_no_link="$gcc_no_link"
772 if test x$gcc_no_link != xyes; then
773 # Use -fno-exceptions to that the C driver can link these tests without
774 # hitting undefined references to personality routines.
775 CXXFLAGS="$CXXFLAGS -fno-exceptions"
776 AC_CHECK_LIB(m, sin, [
779 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
784 # Check for the existence of <math.h> functions used if C99 is enabled.
785 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
786 AC_CACHE_VAL(ac_c99_math, [
787 GCC_TRY_COMPILE_OR_LINK(
789 volatile double d1, d2;
797 i = isgreater(d1, d2);
798 i = isgreaterequal(d1, d2);
800 i = islessequal(d1, d2);
801 i = islessgreater(d1, d2);
802 i = islessgreater(d1, d2);
803 i = isunordered(d1, d2);
804 ],[ac_c99_math=yes], [ac_c99_math=no])
806 AC_MSG_RESULT($ac_c99_math)
807 if test x"$ac_c99_math" = x"yes"; then
808 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
809 [Define if C99 functions or macros in <math.h> should be imported
810 in <cmath> in namespace std.])
813 # Check for the existence of <complex.h> complex math functions.
814 # This is necessary even though libstdc++ uses the builtin versions
815 # of these functions, because if the builtin cannot be used, a reference
816 # to the library function is emitted.
817 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
818 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
820 if test x"$ac_has_complex_h" = x"yes"; then
821 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
822 GCC_TRY_COMPILE_OR_LINK(
823 [#include <complex.h>
824 typedef __complex__ float float_type;
825 typedef __complex__ double double_type;
826 typedef __complex__ long double ld_type;
827 volatile float_type tmpf;
828 volatile double_type tmpd;
829 volatile ld_type tmpld;
832 volatile long double ld;],
844 tmpf = cpowf(tmpf, tmpf);
856 tmpd = cpow(tmpd, tmpd);
859 tmpld = ccosl(tmpld);
860 tmpld = ccoshl(tmpld);
861 tmpld = cexpl(tmpld);
862 tmpld = clogl(tmpld);
863 tmpld = csinl(tmpld);
864 tmpld = csinhl(tmpld);
865 tmpld = csqrtl(tmpld);
866 tmpld = ctanl(tmpld);
867 tmpld = ctanhl(tmpld);
868 tmpld = cpowl(tmpld, tmpld);
869 ],[ac_c99_complex=yes], [ac_c99_complex=no])
871 AC_MSG_RESULT($ac_c99_complex)
872 if test x"$ac_c99_complex" = x"yes"; then
873 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
874 [Define if C99 functions in <complex.h> should be used in
875 <complex>. Using compiler builtins for these functions requires
876 corresponding C99 library functions to be present.])
879 # Check for the existence in <stdio.h> of vscanf, et. al.
880 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
881 AC_CACHE_VAL(ac_c99_stdio, [
882 GCC_TRY_COMPILE_OR_LINK(
885 void foo(char* fmt, ...)
887 va_list args; va_start(args, fmt);
888 vfscanf(stderr, "%i", args);
890 vsnprintf(fmt, 0, "%i", args);
891 vsscanf(fmt, "%i", args);
893 [snprintf("12", 0, "%i");],
894 [ac_c99_stdio=yes], [ac_c99_stdio=no])
896 AC_MSG_RESULT($ac_c99_stdio)
898 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
899 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
900 AC_CACHE_VAL(ac_c99_stdlib, [
901 GCC_TRY_COMPILE_OR_LINK(
904 volatile long double ld;
905 volatile unsigned long long ll;
908 f = strtof("gnu", &tmp);
909 ld = strtold("gnu", &tmp);
910 ll = strtoll("gnu", &tmp, 10);
911 ll = strtoull("gnu", &tmp, 10);
913 mydivt = lldiv(10,1);
918 ],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
920 AC_MSG_RESULT($ac_c99_stdlib)
922 # Check for the existence in <wchar.h> of wcstold, etc.
924 if test x"$ac_has_wchar_h" = xyes &&
925 test x"$ac_has_wctype_h" = xyes; then
926 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
927 AC_TRY_COMPILE([#include <wchar.h>
934 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
936 # Checks for wide character functions that may not be present.
937 # Injection of these is wrapped with guard macros.
938 # NB: only put functions here, instead of immediately above, if
939 # absolutely necessary.
940 AC_TRY_COMPILE([#include <wchar.h>
941 namespace test { using ::vfwscanf; } ], [],
942 [AC_DEFINE(HAVE_VFWSCANF,1,
943 [Defined if vfwscanf exists.])],[])
945 AC_TRY_COMPILE([#include <wchar.h>
946 namespace test { using ::vswscanf; } ], [],
947 [AC_DEFINE(HAVE_VSWSCANF,1,
948 [Defined if vswscanf exists.])],[])
950 AC_TRY_COMPILE([#include <wchar.h>
951 namespace test { using ::vwscanf; } ], [],
952 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
954 AC_TRY_COMPILE([#include <wchar.h>
955 namespace test { using ::wcstof; } ], [],
956 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
958 AC_TRY_COMPILE([#include <wctype.h>],
959 [ wint_t t; int i = iswblank(t);],
960 [AC_DEFINE(HAVE_ISWBLANK,1,
961 [Defined if iswblank exists.])],[])
963 AC_MSG_RESULT($ac_c99_wchar)
966 # Option parsed, now set things appropriately.
967 if test x"$ac_c99_math" = x"no" ||
968 test x"$ac_c99_complex" = x"no" ||
969 test x"$ac_c99_stdio" = x"no" ||
970 test x"$ac_c99_stdlib" = x"no" ||
971 test x"$ac_c99_wchar" = x"no"; then
974 AC_DEFINE(_GLIBCXX_USE_C99, 1,
975 [Define if C99 functions or macros from <wchar.h>, <math.h>,
976 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
979 gcc_no_link="$ac_save_gcc_no_link"
981 CXXFLAGS="$ac_save_CXXFLAGS"
985 AC_MSG_CHECKING([for fully enabled ISO C99 support])
986 AC_MSG_RESULT($enable_c99)
991 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
992 dnl facilities in Chapter 8, "C compatibility".
994 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
999 # Check for the existence of <complex.h> complex math functions used
1001 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1002 ac_c99_complex_tr1=no;
1003 if test x"$ac_has_complex_h" = x"yes"; then
1004 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1005 AC_TRY_COMPILE([#include <complex.h>],
1006 [typedef __complex__ float float_type; float_type tmpf;
1013 typedef __complex__ double double_type; double_type tmpd;
1020 typedef __complex__ long double ld_type; ld_type tmpld;
1027 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1029 AC_MSG_RESULT($ac_c99_complex_tr1)
1030 if test x"$ac_c99_complex_tr1" = x"yes"; then
1031 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1032 [Define if C99 functions in <complex.h> should be used in
1033 <tr1/complex>. Using compiler builtins for these functions
1034 requires corresponding C99 library functions to be present.])
1037 # Check for the existence of <ctype.h> functions.
1038 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1039 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1040 AC_TRY_COMPILE([#include <ctype.h>],
1044 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1046 AC_MSG_RESULT($ac_c99_ctype_tr1)
1047 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1048 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1049 [Define if C99 functions in <ctype.h> should be imported in
1050 <tr1/cctype> in namespace std::tr1.])
1053 # Check for the existence of <fenv.h> functions.
1054 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1056 if test x"$ac_has_fenv_h" = x"yes"; then
1057 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1058 AC_TRY_COMPILE([#include <fenv.h>],
1063 ret = feclearexcept(except);
1064 ret = fegetexceptflag(pflag, except);
1065 ret = feraiseexcept(except);
1066 ret = fesetexceptflag(pflag, except);
1067 ret = fetestexcept(except);
1069 ret = fesetround(mode);
1070 ret = fegetenv(penv);
1071 ret = feholdexcept(penv);
1072 ret = fesetenv(penv);
1073 ret = feupdateenv(penv);
1074 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1076 AC_MSG_RESULT($ac_c99_fenv_tr1)
1077 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1078 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1079 [Define if C99 functions in <fenv.h> should be imported in
1080 <tr1/cfenv> in namespace std::tr1.])
1083 # Check for the existence of <stdint.h> types.
1084 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1085 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1086 AC_TRY_COMPILE([#include <stdint.h>],
1087 [typedef int8_t my_int8_t;
1088 typedef int16_t my_int16_t;
1089 typedef int32_t my_int32_t;
1090 typedef int64_t my_int64_t;
1091 typedef int_fast8_t my_int_fast8_t;
1092 typedef int_fast16_t my_int_fast16_t;
1093 typedef int_fast32_t my_int_fast32_t;
1094 typedef int_fast64_t my_int_fast64_t;
1095 typedef int_least8_t my_int_least8_t;
1096 typedef int_least16_t my_int_least16_t;
1097 typedef int_least32_t my_int_least32_t;
1098 typedef int_least64_t my_int_least64_t;
1099 typedef intmax_t my_intmax_t;
1100 typedef intptr_t my_intptr_t;
1101 typedef uint8_t my_uint8_t;
1102 typedef uint16_t my_uint16_t;
1103 typedef uint32_t my_uint32_t;
1104 typedef uint64_t my_uint64_t;
1105 typedef uint_fast8_t my_uint_fast8_t;
1106 typedef uint_fast16_t my_uint_fast16_t;
1107 typedef uint_fast32_t my_uint_fast32_t;
1108 typedef uint_fast64_t my_uint_fast64_t;
1109 typedef uint_least8_t my_uint_least8_t;
1110 typedef uint_least16_t my_uint_least16_t;
1111 typedef uint_least32_t my_uint_least32_t;
1112 typedef uint_least64_t my_uint_least64_t;
1113 typedef uintmax_t my_uintmax_t;
1114 typedef uintptr_t my_uintptr_t;
1115 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1117 AC_MSG_RESULT($ac_c99_stdint_tr1)
1118 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1119 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1120 [Define if C99 types in <stdint.h> should be imported in
1121 <tr1/cstdint> in namespace std::tr1.])
1124 # Check for the existence of <math.h> functions.
1125 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1126 AC_CACHE_VAL(ac_c99_math_tr1, [
1127 AC_TRY_COMPILE([#include <math.h>],
1128 [typedef double_t my_double_t;
1129 typedef float_t my_float_t;
1143 copysignf(0.0f, 0.0f);
1144 copysignl(0.0l, 0.0l);
1161 fmaf(0.0f, 0.0f, 0.0f);
1162 fmal(0.0l, 0.0l, 0.0l);
1205 nextafter(0.0, 0.0);
1206 nextafterf(0.0f, 0.0f);
1207 nextafterl(0.0l, 0.0l);
1208 nexttoward(0.0, 0.0);
1209 nexttowardf(0.0f, 0.0f);
1210 nexttowardl(0.0l, 0.0l);
1211 remainder(0.0, 0.0);
1212 remainderf(0.0f, 0.0f);
1213 remainderl(0.0l, 0.0l);
1214 remquo(0.0, 0.0, 0);
1215 remquo(0.0f, 0.0f, 0);
1216 remquo(0.0l, 0.0l, 0);
1235 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1237 AC_MSG_RESULT($ac_c99_math_tr1)
1238 if test x"$ac_c99_math_tr1" = x"yes"; then
1239 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1240 [Define if C99 functions or macros in <math.h> should be imported
1241 in <tr1/cmath> in namespace std::tr1.])
1244 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1245 # sense if the previous check fails, per C99, 7.8/1).
1246 ac_c99_inttypes_tr1=no;
1247 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1248 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1249 AC_TRY_COMPILE([#include <inttypes.h>],
1250 [intmax_t i, numer, denom, base;
1253 intmax_t ret = imaxabs(i);
1254 imaxdiv_t dret = imaxdiv(numer, denom);
1255 ret = strtoimax(s, endptr, base);
1256 uintmax_t uret = strtoumax(s, endptr, base);
1257 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1259 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1260 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1261 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1262 [Define if C99 functions in <inttypes.h> should be imported in
1263 <tr1/cinttypes> in namespace std::tr1.])
1266 # Check for the existence of the <stdbool.h> header.
1267 AC_CHECK_HEADERS(stdbool.h)
1273 dnl Check whether "dev/random" and "dev/urandom" are available for the
1274 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1276 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1278 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1279 AC_CACHE_VAL(ac_random_tr1, [
1280 AC_TRY_RUN([#include <stdio.h>
1283 return !(fopen("/dev/random", "r")
1284 && fopen("/dev/urandom", "r"));
1287 [ac_random_tr1=yes], [ac_random_tr1=no],
1290 AC_MSG_RESULT($ac_random_tr1)
1291 if test x"$ac_random_tr1" = x"yes"; then
1292 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1293 [Define if dev/random and dev/urandom are available for
1294 the random_device of TR1 (Chapter 5.1).])
1300 dnl Check whether macros, etc are present for <system_error>
1302 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1304 AC_MSG_CHECKING([for EOWNERDEAD])
1305 AC_CACHE_VAL(ac_system_error1, [
1306 AC_TRY_COMPILE([#include <errno.h>], [ int i = EOWNERDEAD; ],
1307 [ac_system_error1=yes], [ac_system_error1=no])
1309 AC_MSG_RESULT($ac_system_error1)
1310 if test x"$ac_system_error1" = x"yes"; then
1311 AC_DEFINE(HAVE_EOWNERDEAD, 1, [Define if EOWNERDEAD exists.])
1314 AC_MSG_CHECKING([for ENOTRECOVERABLE])
1315 AC_CACHE_VAL(ac_system_error2, [
1316 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOTRECOVERABLE; ],
1317 [ac_system_error2=yes], [ac_system_error2=no])
1319 AC_MSG_RESULT($ac_system_error2)
1320 if test x"$ac_system_error2" = x"yes"; then
1321 AC_DEFINE(HAVE_ENOTRECOVERABLE, 1, [Define if ENOTRECOVERABLE exists.])
1324 AC_MSG_CHECKING([for ENOLINK])
1325 AC_CACHE_VAL(ac_system_error3, [
1326 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOLINK; ],
1327 [ac_system_error3=yes], [ac_system_error3=no])
1329 AC_MSG_RESULT($ac_system_error3)
1330 if test x"$ac_system_error3" = x"yes"; then
1331 AC_DEFINE(HAVE_ENOLINK, 1, [Define if ENOLINK exists.])
1334 AC_MSG_CHECKING([for EPROTO])
1335 AC_CACHE_VAL(ac_system_error_4, [
1336 AC_TRY_COMPILE([#include <errno.h>], [ int i = EPROTO; ],
1337 [ac_system_error_4=yes], [ac_system_error_4=no])
1339 AC_MSG_RESULT($ac_system_error_4)
1340 if test x"$ac_system_error_4" = x"yes"; then
1341 AC_DEFINE(HAVE_EPROTO, 1, [Define if EPROTO exists.])
1344 AC_MSG_CHECKING([for ENODATA])
1345 AC_CACHE_VAL(ac_system_error_5, [
1346 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENODATA; ],
1347 [ac_system_error_5=yes], [ac_system_error_5=no])
1349 AC_MSG_RESULT($ac_system_error_5)
1350 if test x"$ac_system_error_5" = x"yes"; then
1351 AC_DEFINE(HAVE_ENODATA, 1, [Define if ENODATA exists.])
1354 AC_MSG_CHECKING([for ENOSR])
1355 AC_CACHE_VAL(ac_system_error_6, [
1356 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSR; ],
1357 [ac_system_error_6=yes], [ac_system_error_6=no])
1359 AC_MSG_RESULT($ac_system_error_6)
1360 if test x"$ac_system_error_6" = x"yes"; then
1361 AC_DEFINE(HAVE_ENOSR, 1, [Define if ENOSR exists.])
1364 AC_MSG_CHECKING([for ENOSTR])
1365 AC_CACHE_VAL(ac_system_error_7, [
1366 AC_TRY_COMPILE([#include <errno.h>], [ int i = ENOSTR; ],
1367 [ac_system_error_7=yes], [ac_system_error_7=no])
1369 AC_MSG_RESULT($ac_system_error_7)
1370 if test x"$ac_system_error_7" = x"yes"; then
1371 AC_DEFINE(HAVE_ENOSTR, 1, [Define if ENOSTR exists.])
1374 AC_MSG_CHECKING([for ETIME])
1375 AC_CACHE_VAL(ac_system_error_8, [
1376 AC_TRY_COMPILE([#include <errno.h>], [ int i = ETIME; ],
1377 [ac_system_error_8=yes], [ac_system_error_8=no])
1379 AC_MSG_RESULT($ac_system_error_8)
1380 if test x"$ac_system_error_8" = x"yes"; then
1381 AC_DEFINE(HAVE_ETIME, 1, [Define if ETIME exists.])
1384 AC_MSG_CHECKING([for sys_nerr])
1385 AC_CACHE_VAL(ac_system_error9, [
1386 AC_TRY_COMPILE([#include <errno.h> ], [ int i = sys_nerr; ],
1387 [ac_system_error9=yes], [ac_system_error9=no])
1389 AC_MSG_RESULT($ac_system_error9)
1390 if test x"$ac_system_error9" = x"yes"; then
1391 AC_DEFINE(HAVE_SYS_NERR, 1, [Define if sys_nerr exists.])
1394 AC_MSG_CHECKING([for EBADMSG])
1395 AC_CACHE_VAL(ac_system_error_10, [
1396 AC_TRY_COMPILE([#include <errno.h>], [ int i = EBADMSG; ],
1397 [ac_system_error_10=yes], [ac_system_error_10=no])
1399 AC_MSG_RESULT($ac_system_error_10)
1400 if test x"$ac_system_error_10" = x"yes"; then
1401 AC_DEFINE(HAVE_EBADMSG, 1, [Define if EBADMSG exists.])
1404 AC_MSG_CHECKING([for ECANCELED])
1405 AC_CACHE_VAL(ac_system_error_11, [
1406 AC_TRY_COMPILE([#include <errno.h>], [ int i = ECANCELED; ],
1407 [ac_system_error_11=yes], [ac_system_error_11=no])
1409 AC_MSG_RESULT($ac_system_error_11)
1410 if test x"$ac_system_error_11" = x"yes"; then
1411 AC_DEFINE(HAVE_ECANCELED, 1, [Define if ECANCELED exists.])
1414 AC_MSG_CHECKING([for EOVERFLOW])
1415 AC_CACHE_VAL(ac_system_error_12, [
1416 AC_TRY_COMPILE([#include <errno.h>], [ int i = EOVERFLOW; ],
1417 [ac_system_error_12=yes], [ac_system_error_12=no])
1419 AC_MSG_RESULT($ac_system_error_12)
1420 if test x"$ac_system_error_12" = x"yes"; then
1421 AC_DEFINE(HAVE_EOVERFLOW, 1, [Define if EOVERFLOW exists.])
1426 dnl Check for what type of C headers to use.
1428 dnl --enable-cheaders= [does stuff].
1429 dnl --disable-cheaders [does not do anything, really].
1430 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1431 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1433 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1434 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1435 [construct "C" headers for g++], [permit c|c_std|c_global])
1436 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1438 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1440 # Allow overrides to configure.host here.
1441 if test $enable_cheaders = c_global; then
1445 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1449 AC_SUBST(C_INCLUDE_DIR)
1450 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1451 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1452 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1453 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1454 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1459 dnl Check for which locale library to use. The choice is mapped to
1460 dnl a subdirectory of config/locale.
1462 dnl Default is generic.
1464 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1465 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1466 [use MODEL for target locale package],
1467 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1469 # Deal with gettext issues. Default to not using it (=no) until we detect
1470 # support for it later. Let the user turn it off via --e/d, but let that
1471 # default to on for easier handling.
1474 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1478 # Either a known packaage, or "auto"
1479 if test $enable_clocale = no || test $enable_clocale = yes; then
1482 enable_clocale_flag=$enable_clocale
1484 # Probe for locale model to use if none specified.
1485 # Default to "generic".
1486 if test $enable_clocale_flag = auto; then
1487 case ${target_os} in
1488 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1489 enable_clocale_flag=gnu
1492 enable_clocale_flag=darwin
1495 enable_clocale_flag=generic
1500 # Sanity check model, and test for special functionality.
1501 if test $enable_clocale_flag = gnu; then
1502 AC_EGREP_CPP([_GLIBCXX_ok], [
1503 #include <features.h>
1504 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1507 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1509 if test $enable_clocale = auto; then
1510 # Test for bugs early in glibc-2.2.x series
1512 #define _GNU_SOURCE 1
1515 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1516 extern __typeof(newlocale) __newlocale;
1517 extern __typeof(duplocale) __duplocale;
1518 extern __typeof(strcoll_l) __strcoll_l;
1522 const char __one[] = "Äuglein Augmen";
1523 const char __two[] = "Äuglein";
1528 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1529 loc_dup = __duplocale(loc);
1530 i = __strcoll_l(__one, __two, loc);
1531 j = __strcoll_l(__one, __two, loc_dup);
1535 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1536 [enable_clocale_flag=generic])
1539 # Set it to scream when it hurts.
1540 ac_save_CFLAGS="$CFLAGS"
1541 CFLAGS="-Wimplicit-function-declaration -Werror"
1543 # Use strxfrm_l if available.
1544 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1546 #include <locale.h>],
1547 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1548 AC_DEFINE(HAVE_STRXFRM_L, 1,
1549 [Define if strxfrm_l is available in <string.h>.]),)
1551 # Use strerror_l if available.
1552 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1554 #include <locale.h>],
1555 [__locale_t loc; strerror_l(5, loc);],
1556 AC_DEFINE(HAVE_STRERROR_L, 1,
1557 [Define if strerror_l is available in <string.h>.]),)
1559 CFLAGS="$ac_save_CFLAGS"
1562 # Perhaps use strerror_r if available, and strerror_l isn't.
1563 ac_save_CFLAGS="$CFLAGS"
1564 CFLAGS="-Wimplicit-function-declaration -Werror"
1565 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1567 #include <locale.h>],
1568 [char s[128]; strerror_r(5, s, 128);],
1569 AC_DEFINE(HAVE_STRERROR_R, 1,
1570 [Define if strerror_r is available in <string.h>.]),)
1571 CFLAGS="$ac_save_CFLAGS"
1573 # Set configure bits for specified locale package
1574 AC_MSG_CHECKING([for C locale to use])
1575 case ${enable_clocale_flag} in
1577 AC_MSG_RESULT(generic)
1579 CLOCALE_H=config/locale/generic/c_locale.h
1580 CLOCALE_CC=config/locale/generic/c_locale.cc
1581 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1582 CCOLLATE_CC=config/locale/generic/collate_members.cc
1583 CCTYPE_CC=config/locale/generic/ctype_members.cc
1584 CMESSAGES_H=config/locale/generic/messages_members.h
1585 CMESSAGES_CC=config/locale/generic/messages_members.cc
1586 CMONEY_CC=config/locale/generic/monetary_members.cc
1587 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1588 CTIME_H=config/locale/generic/time_members.h
1589 CTIME_CC=config/locale/generic/time_members.cc
1590 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1593 AC_MSG_RESULT(darwin or freebsd)
1595 CLOCALE_H=config/locale/generic/c_locale.h
1596 CLOCALE_CC=config/locale/generic/c_locale.cc
1597 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1598 CCOLLATE_CC=config/locale/generic/collate_members.cc
1599 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1600 CMESSAGES_H=config/locale/generic/messages_members.h
1601 CMESSAGES_CC=config/locale/generic/messages_members.cc
1602 CMONEY_CC=config/locale/generic/monetary_members.cc
1603 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1604 CTIME_H=config/locale/generic/time_members.h
1605 CTIME_CC=config/locale/generic/time_members.cc
1606 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1612 # Declare intention to use gettext, and add support for specific
1614 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1617 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1618 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1619 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1622 # Export the build objects.
1623 for ling in $ALL_LINGUAS; do \
1624 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1625 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1627 AC_SUBST(glibcxx_MOFILES)
1628 AC_SUBST(glibcxx_POFILES)
1630 CLOCALE_H=config/locale/gnu/c_locale.h
1631 CLOCALE_CC=config/locale/gnu/c_locale.cc
1632 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1633 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1634 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1635 CMESSAGES_H=config/locale/gnu/messages_members.h
1636 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1637 CMONEY_CC=config/locale/gnu/monetary_members.cc
1638 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1639 CTIME_H=config/locale/gnu/time_members.h
1640 CTIME_CC=config/locale/gnu/time_members.cc
1641 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1644 AC_MSG_RESULT(IEEE 1003.1)
1646 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1647 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1648 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1649 CCOLLATE_CC=config/locale/generic/collate_members.cc
1650 CCTYPE_CC=config/locale/generic/ctype_members.cc
1651 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1652 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1653 CMONEY_CC=config/locale/generic/monetary_members.cc
1654 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1655 CTIME_H=config/locale/generic/time_members.h
1656 CTIME_CC=config/locale/generic/time_members.cc
1657 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1661 # This is where the testsuite looks for locale catalogs, using the
1662 # -DLOCALEDIR define during testsuite compilation.
1663 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1664 AC_SUBST(glibcxx_localedir)
1666 # A standalone libintl (e.g., GNU libintl) may be in use.
1667 if test $USE_NLS = yes; then
1668 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1669 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1671 if test $USE_NLS = yes; then
1672 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1673 [Define if NLS translations are to be used.])
1678 AC_SUBST(CMESSAGES_H)
1679 AC_SUBST(CCODECVT_CC)
1680 AC_SUBST(CCOLLATE_CC)
1682 AC_SUBST(CMESSAGES_CC)
1684 AC_SUBST(CNUMERIC_CC)
1687 AC_SUBST(CLOCALE_CC)
1688 AC_SUBST(CLOCALE_INTERNAL_H)
1693 dnl Check for which std::allocator base class to use. The choice is
1694 dnl mapped from a subdirectory of include/ext.
1698 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1699 AC_MSG_CHECKING([for std::allocator base class])
1700 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1701 [use KIND for target std::allocator base],
1702 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1704 # If they didn't use this option switch, or if they specified --enable
1705 # with no specific model, we'll have to look for one. If they
1706 # specified --disable (???), do likewise.
1707 if test $enable_libstdcxx_allocator = no ||
1708 test $enable_libstdcxx_allocator = yes;
1710 enable_libstdcxx_allocator=auto
1713 # Either a known package, or "auto". Auto implies the default choice
1714 # for a particular platform.
1715 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1717 # Probe for host-specific support if no specific model is specified.
1719 if test $enable_libstdcxx_allocator_flag = auto; then
1720 case ${target_os} in
1721 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1722 enable_libstdcxx_allocator_flag=new
1725 enable_libstdcxx_allocator_flag=new
1729 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1732 # Set configure bits for specified locale package
1733 case ${enable_libstdcxx_allocator_flag} in
1735 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1736 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1739 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1740 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1743 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1744 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1747 ALLOCATOR_H=config/allocator/new_allocator_base.h
1748 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1751 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1752 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1756 AC_SUBST(ALLOCATOR_H)
1757 AC_SUBST(ALLOCATOR_NAME)
1762 dnl Check for whether the Boost-derived checks should be turned on.
1764 dnl --enable-concept-checks turns them on.
1765 dnl --disable-concept-checks leaves them off.
1766 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1767 dnl Where DEFAULT is either `yes' or `no'.
1769 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1770 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1771 if test $enable_concept_checks = yes; then
1772 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1773 [Define to use concept checking code from the boost libraries.])
1778 dnl Check for parallel mode pre-requisites, including OpenMP support.
1780 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1782 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1784 # NB: libstdc++ may be configured before libgomp: can't check for the actual
1785 # dependencies (omp.h and libgomp).
1787 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1788 enable_parallel=yes;
1790 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1793 # Check to see if it's explicitly disabled.
1794 # GLIBCXX_ENABLE(libgomp,$1,,[enable code depending on libgomp],
1797 # if test x$enable_libgomp = xno; then
1798 # enable_parallel=no
1801 AC_MSG_CHECKING([for parallel mode support])
1802 AC_MSG_RESULT([$enable_parallel])
1803 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1808 dnl Check for which I/O library to use: stdio, or something specific.
1810 dnl Default is stdio.
1812 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1813 AC_MSG_CHECKING([for underlying I/O to use])
1814 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1815 [use target-specific I/O package], [permit stdio])
1817 # Now that libio has been removed, you can have any color you want as long
1818 # as it's black. This is one big no-op until other packages are added, but
1819 # showing the framework never hurts.
1820 case ${enable_cstdio} in
1822 CSTDIO_H=config/io/c_io_stdio.h
1823 BASIC_FILE_H=config/io/basic_file_stdio.h
1824 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1825 AC_MSG_RESULT(stdio)
1830 AC_SUBST(BASIC_FILE_H)
1831 AC_SUBST(BASIC_FILE_CC)
1836 dnl Check for "unusual" flags to pass to the compiler while building.
1838 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1839 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1840 dnl --disable-cxx-flags passes nothing.
1841 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1842 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1843 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1844 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1845 dnl If "default flags" is an empty string, the effect is the same
1846 dnl as --disable or --enable=no.
1848 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1849 AC_MSG_CHECKING([for extra compiler flags for building])
1850 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1851 [pass compiler FLAGS when building library],
1852 [case "x$enable_cxx_flags" in
1853 xno | x) enable_cxx_flags= ;;
1855 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1858 # Run through flags (either default or command-line) and set anything
1859 # extra (e.g., #defines) that must accompany particular g++ options.
1860 if test -n "$enable_cxx_flags"; then
1861 for f in $enable_cxx_flags; do
1865 *) # and we're trying to pass /what/ exactly?
1866 AC_MSG_ERROR([compiler flags start with a -]) ;;
1871 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1872 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1873 AC_SUBST(EXTRA_CXX_FLAGS)
1878 dnl Check to see if debugging libraries are to be built.
1880 dnl --enable-libstdcxx-debug
1881 dnl builds a separate set of debugging libraries in addition to the
1882 dnl normal (shared, static) libstdc++ binaries.
1884 dnl --disable-libstdcxx-debug
1885 dnl builds only one (non-debug) version of libstdc++.
1887 dnl --enable-libstdcxx-debug-flags=FLAGS
1888 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1890 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1891 dnl Where DEFAULT is either `yes' or `no'.
1893 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1894 AC_MSG_CHECKING([for additional debug build])
1895 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1896 AC_MSG_RESULT($enable_libstdcxx_debug)
1897 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1902 dnl Check for explicit debug flags.
1904 dnl --enable-libstdcxx-debug-flags='-O1'
1905 dnl is a general method for passing flags to be used when
1906 dnl building debug libraries with --enable-debug.
1908 dnl --disable-libstdcxx-debug-flags does nothing.
1909 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1910 dnl If "default flags" is an empty string, the effect is the same
1911 dnl as --disable or --enable=no.
1913 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1914 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1915 [pass compiler FLAGS when building debug library],
1916 [case "x$enable_libstdcxx_debug_flags" in
1917 xno | x) enable_libstdcxx_debug_flags= ;;
1919 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1922 # Option parsed, now set things appropriately
1923 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1924 AC_SUBST(DEBUG_FLAGS)
1926 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1931 dnl Check if the user only wants a freestanding library implementation.
1933 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1934 dnl installing only the headers required by [17.4.1.3] and the language
1935 dnl support library. More than that will be built (to keep the Makefiles
1936 dnl conveniently clean), but not installed.
1939 dnl is_hosted (yes/no)
1942 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1944 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1945 AC_ARG_ENABLE([hosted-libstdcxx],
1946 AC_HELP_STRING([--disable-hosted-libstdcxx],
1947 [only build freestanding C++ runtime support]),,
1950 enable_hosted_libstdcxx=no
1953 enable_hosted_libstdcxx=yes
1956 if test "$enable_hosted_libstdcxx" = no; then
1957 AC_MSG_NOTICE([Only freestanding libraries will be built])
1961 enable_libstdcxx_pch=no
1966 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1967 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1968 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1973 dnl Check for template specializations for the 'long long' type.
1974 dnl The result determines only whether 'long long' I/O is enabled; things
1975 dnl like numeric_limits<> specializations are always available.
1977 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1978 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1979 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1980 dnl Where DEFAULT is either `yes' or `no'.
1982 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1983 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1984 if test $enable_long_long = yes; then
1985 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1986 [Define if code specialized for long long should be used.])
1988 AC_MSG_CHECKING([for enabled long long specializations])
1989 AC_MSG_RESULT([$enable_long_long])
1994 dnl Check for template specializations for the 'wchar_t' type.
1996 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1997 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1998 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1999 dnl Where DEFAULT is either `yes' or `no'.
2001 dnl Necessary support must also be present.
2003 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2004 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2006 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2007 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2008 AC_MSG_CHECKING([for mbstate_t])
2009 AC_TRY_COMPILE([#include <wchar.h>],
2010 [mbstate_t teststate;],
2011 have_mbstate_t=yes, have_mbstate_t=no)
2012 AC_MSG_RESULT($have_mbstate_t)
2013 if test x"$have_mbstate_t" = xyes; then
2014 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2017 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2019 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2021 if test x"$enable_wchar_t" = x"yes"; then
2026 if test x"$ac_has_wchar_h" = xyes &&
2027 test x"$ac_has_wctype_h" = xyes; then
2028 AC_TRY_COMPILE([#include <wchar.h>
2089 ],[],[], [enable_wchar_t=no])
2097 if test x"$enable_wchar_t" = x"yes"; then
2098 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2099 [Define if code specialized for wchar_t should be used.])
2102 AC_MSG_CHECKING([for enabled wchar_t specializations])
2103 AC_MSG_RESULT([$enable_wchar_t])
2108 dnl Check to see if building and using a C++ precompiled header can be done.
2110 dnl --enable-libstdcxx-pch=yes
2111 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2112 dnl may work, after some light-hearted attempts to puzzle out compiler
2113 dnl support, flip bits on in include/Makefile.am
2115 dnl --disable-libstdcxx-pch
2116 dnl turns off attempts to use or build stdc++.h.gch.
2119 dnl glibcxx_PCHFLAGS
2121 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2122 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2123 if test $enable_libstdcxx_pch = yes; then
2124 AC_CACHE_CHECK([for compiler with PCH support],
2125 [glibcxx_cv_prog_CXX_pch],
2126 [ac_save_CXXFLAGS="$CXXFLAGS"
2127 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2130 echo '#include <math.h>' > conftest.h
2131 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2132 -o conftest.h.gch 1>&5 2>&1 &&
2133 echo '#error "pch failed"' > conftest.h &&
2134 echo '#include "conftest.h"' > conftest.cc &&
2135 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2137 glibcxx_cv_prog_CXX_pch=yes
2139 glibcxx_cv_prog_CXX_pch=no
2142 CXXFLAGS=$ac_save_CXXFLAGS
2145 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2148 AC_MSG_CHECKING([for enabled PCH])
2149 AC_MSG_RESULT([$enable_libstdcxx_pch])
2151 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2152 if test $enable_libstdcxx_pch = yes; then
2153 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2157 AC_SUBST(glibcxx_PCHFLAGS)
2162 dnl Check for atomic builtins.
2164 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2166 dnl This checks to see if the host supports the compiler-generated
2167 dnl builtins for atomic operations. Note, this is intended to be an
2168 dnl all-or-nothing switch, so all the atomic operations that are used
2169 dnl should be checked.
2172 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2173 dnl see: CHECK_SYNC_FETCH_AND_ADD
2176 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
2178 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2179 AC_MSG_CHECKING([for atomic builtins])
2183 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2184 cat > conftest.$ac_ext << EOF
2185 [#]line __oline__ "configure"
2188 // NB: _Atomic_word not necessarily int.
2189 typedef int atomic_type;
2192 const atomic_type c3(0);
2193 if (__sync_fetch_and_add(&c1, c2) == c3)
2200 old_CXXFLAGS="$CXXFLAGS"
2202 if AC_TRY_EVAL(ac_compile); then
2203 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2204 enable_atomic_builtins=no
2206 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2207 [Define if builtin atomic operations are supported on this host.])
2208 enable_atomic_builtins=yes
2209 atomicity_dir=cpu/generic/atomicity_builtins
2212 CXXFLAGS="$old_CXXFLAGS"
2215 # Now, if still generic, set to mutex.
2216 if test $atomicity_dir = "cpu/generic" ; then
2217 atomicity_dir=cpu/generic/atomicity_mutex
2220 AC_MSG_RESULT($enable_atomic_builtins)
2225 dnl Check for exception handling support. If an explicit enable/disable
2226 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2227 dnl target may or may not support call frame exceptions.
2229 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2230 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2231 dnl Neither one forces an attempt at detection.
2234 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2236 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2237 AC_MSG_CHECKING([for exception model to use])
2240 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2241 [force use of builtin_setjmp for exceptions],
2242 [permit yes|no|auto])
2244 if test $enable_sjlj_exceptions = auto; then
2245 # Botheration. Now we've got to detect the exception model. Link tests
2246 # against libgcc.a are problematic since we've not been given proper -L
2247 # bits for single-tree newlib and libgloss.
2249 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2250 cat > conftest.$ac_ext << EOF
2251 [#]line __oline__ "configure"
2260 old_CXXFLAGS="$CXXFLAGS"
2262 if AC_TRY_EVAL(ac_compile); then
2263 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2264 enable_sjlj_exceptions=yes
2265 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2266 enable_sjlj_exceptions=no
2267 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2268 enable_sjlj_exceptions=no
2271 CXXFLAGS="$old_CXXFLAGS"
2275 # This is a tad weird, for hysterical raisins. We have to map
2276 # enable/disable to two different models.
2277 case $enable_sjlj_exceptions in
2279 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2280 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2281 ac_exception_model_name=sjlj
2284 ac_exception_model_name="call frame"
2287 AC_MSG_ERROR([unable to detect exception model])
2291 AC_MSG_RESULT($ac_exception_model_name)
2296 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2298 dnl --enable-visibility enables attempt to use visibility attributes.
2299 dnl --disable-visibility turns off all use of visibility attributes.
2300 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2301 dnl Where DEFAULT is 'yes'.
2303 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2304 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2306 if test x$enable_visibility = xyes ; then
2307 dnl all hail libgfortran
2308 dnl Check whether the target supports hidden visibility.
2309 AC_CACHE_CHECK([whether the target supports hidden visibility],
2310 have_attribute_visibility, [
2311 save_CFLAGS="$CFLAGS"
2312 CFLAGS="$CFLAGS -Werror"
2313 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2314 [], have_attribute_visibility=yes,
2315 have_attribute_visibility=no)
2316 CFLAGS="$save_CFLAGS"])
2317 if test $have_attribute_visibility = no; then
2318 enable_visibility=no
2322 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2323 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2328 dnl Add version tags to symbols in shared library (or not), additionally
2329 dnl marking other symbols as private/local (or not).
2331 dnl --enable-symvers=style adds a version script to the linker call when
2332 dnl creating the shared library. The choice of version script is
2333 dnl controlled by 'style'.
2334 dnl --disable-symvers does not.
2335 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2336 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2337 dnl choose a default style based on linker characteristics. Passing
2338 dnl 'no' disables versioning.
2340 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2342 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2343 [enables symbol versioning of the shared library],
2344 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2346 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2347 # don't know enough about $LD to do tricks...
2348 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2350 # Turn a 'yes' into a suitable default.
2351 if test x$enable_symvers = xyes ; then
2352 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2355 if test $with_gnu_ld = yes ; then
2358 case ${target_os} in
2360 enable_symvers=darwin ;;
2362 enable_symvers=no ;;
2368 # Check to see if 'darwin' or 'darwin-export' can win.
2369 if test x$enable_symvers = xdarwin-export ; then
2370 enable_symvers=darwin
2373 # Check to see if 'gnu' can win.
2374 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2375 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2376 AC_MSG_CHECKING([for shared libgcc])
2377 ac_save_CFLAGS="$CFLAGS"
2379 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2380 CFLAGS="$ac_save_CFLAGS"
2381 if test $glibcxx_shared_libgcc = no; then
2382 cat > conftest.c <<EOF
2383 int main (void) { return 0; }
2386 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2387 -shared -shared-libgcc -o conftest.so \
2388 conftest.c -v 2>&1 >/dev/null \
2389 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2391 rm -f conftest.c conftest.so
2392 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2393 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2394 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2395 CFLAGS="$ac_save_CFLAGS"
2398 AC_MSG_RESULT($glibcxx_shared_libgcc)
2400 # For GNU ld, we need at least this version. The format is described in
2401 # GLIBCXX_CHECK_LINKER_FEATURES above.
2402 glibcxx_min_gnu_ld_version=21400
2404 # If no shared libgcc, can't win.
2405 if test $glibcxx_shared_libgcc != yes; then
2406 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2407 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2408 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2410 elif test $with_gnu_ld != yes ; then
2412 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2413 AC_MSG_WARN([=== you are not using the GNU linker.])
2414 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2416 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2417 # The right tools, the right setup, but too old. Fallbacks?
2418 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2419 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2420 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2421 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2422 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2427 # Everything parsed; figure out what file to use.
2428 case $enable_symvers in
2430 SYMVER_FILE=config/abi/pre/none.ver
2433 SYMVER_FILE=config/abi/pre/gnu.ver
2434 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2435 [Define to use GNU versioning in the shared library.])
2437 gnu-versioned-namespace)
2438 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2439 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2440 [Define to use GNU namespace versioning in the shared library.])
2443 SYMVER_FILE=config/abi/pre/gnu.ver
2444 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2445 [Define to use darwin versioning in the shared library.])
2449 if test x$enable_symvers != xno ; then
2450 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2451 [Define to use symbol versioning in the shared library.])
2454 AC_SUBST(SYMVER_FILE)
2455 AC_SUBST(port_specific_symbol_files)
2456 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2457 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2458 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2459 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2460 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2462 # Now, set up compatibility support, if any.
2463 # In addition, need this to deal with std::size_t mangling in
2464 # src/compatibility.cc. In a perfect world, could use
2465 # typeid(std::size_t).name()[0] to do direct substitution.
2466 AC_MSG_CHECKING([for size_t as unsigned int])
2467 ac_save_CFLAGS="$CFLAGS"
2469 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2470 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2471 CFLAGS=$ac_save_CFLAGS
2472 if test "$glibcxx_size_t_is_i" = yes; then
2473 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2475 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2477 AC_MSG_CHECKING([for ptrdiff_t as int])
2478 ac_save_CFLAGS="$CFLAGS"
2480 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2481 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2482 CFLAGS=$ac_save_CFLAGS
2483 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2484 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2486 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2491 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2492 dnl We must stage the required headers so that they will be installed
2493 dnl with the library (unlike libgcc, the STL implementation is provided
2494 dnl solely within headers). Since we must not inject random user-space
2495 dnl macro names into user-provided C++ code, we first stage into <file>-in
2496 dnl and process to <file> with an output command. The reason for a two-
2497 dnl stage process here is to correctly handle $srcdir!=$objdir without
2498 dnl having to write complex code (the sed commands to clean the macro
2499 dnl namespace are complex and fragile enough as it is). We must also
2500 dnl add a relative path so that -I- is supported properly.
2503 dnl glibcxx_thread_h
2506 dnl HAVE_GTHR_DEFAULT
2508 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2509 AC_MSG_CHECKING([for thread model used by GCC])
2510 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2511 AC_MSG_RESULT([$target_thread_file])
2513 if test $target_thread_file != single; then
2514 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2515 [Define if gthr-default.h exists
2516 (meaning that threading support is enabled).])
2519 glibcxx_thread_h=gthr-$target_thread_file.h
2521 dnl Check for __GTHREADS define.
2522 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2523 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2529 AC_SUBST(glibcxx_thread_h)
2533 # Check whether LC_MESSAGES is available in <locale.h>.
2534 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2536 # This file file be copied and used freely without restrictions. It can
2537 # be used in projects which are not available under the GNU Public License
2538 # but which still want to provide support for the GNU gettext functionality.
2539 # Please note that the actual code is *not* freely available.
2542 AC_DEFUN([AC_LC_MESSAGES], [
2543 AC_CHECK_HEADER(locale.h, [
2544 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2545 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2546 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2547 if test $ac_cv_val_LC_MESSAGES = yes; then
2548 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2549 [Define if LC_MESSAGES is available in <locale.h>.])
2554 # Macros from the top-level gcc directory.
2555 m4_include([../config/tls.m4])