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(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
800 if test x"$ac_has_complex_h" = x"yes"; then
801 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
802 AC_TRY_COMPILE([#include <complex.h>],
803 [typedef __complex__ float float_type; float_type tmpf;
816 typedef __complex__ double double_type; double_type tmpd;
829 typedef __complex__ long double ld_type; ld_type tmpld;
842 ],[ac_c99_complex=yes], [ac_c99_complex=no])
844 AC_MSG_RESULT($ac_c99_complex)
845 if test x"$ac_c99_complex" = x"yes"; then
846 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
847 [Define if C99 functions in <complex.h> should be used in
848 <complex>. Using compiler builtins for these functions requires
849 corresponding C99 library functions to be present.])
852 # Check for the existence in <stdio.h> of vscanf, et. al.
853 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
854 AC_CACHE_VAL(ac_c99_stdio, [
855 AC_TRY_COMPILE([#include <stdio.h>
857 void foo(char* fmt, ...)
859 va_list args; va_start(args, fmt);
860 vfscanf(stderr, "%i", args);
862 vsnprintf(fmt, 0, "%i", args);
863 vsscanf(fmt, "%i", args);
865 [snprintf("12", 0, "%i");],
866 [ac_c99_stdio=yes], [ac_c99_stdio=no])
868 AC_MSG_RESULT($ac_c99_stdio)
870 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
871 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
872 AC_CACHE_VAL(ac_c99_stdlib, [
873 AC_TRY_COMPILE([#include <stdlib.h>],
876 strtold("gnu", &tmp);
877 strtoll("gnu", &tmp, 10);
878 strtoull("gnu", &tmp, 10);
883 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
885 AC_MSG_RESULT($ac_c99_stdlib)
887 # Check for the existence in <wchar.h> of wcstold, etc.
889 if test x"$ac_has_wchar_h" = xyes &&
890 test x"$ac_has_wctype_h" = xyes; then
891 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
892 AC_TRY_COMPILE([#include <wchar.h>
899 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
901 # Checks for wide character functions that may not be present.
902 # Injection of these is wrapped with guard macros.
903 # NB: only put functions here, instead of immediately above, if
904 # absolutely necessary.
905 AC_TRY_COMPILE([#include <wchar.h>
906 namespace test { using ::vfwscanf; } ], [],
907 [AC_DEFINE(HAVE_VFWSCANF,1,
908 [Defined if vfwscanf exists.])],[])
910 AC_TRY_COMPILE([#include <wchar.h>
911 namespace test { using ::vswscanf; } ], [],
912 [AC_DEFINE(HAVE_VSWSCANF,1,
913 [Defined if vswscanf exists.])],[])
915 AC_TRY_COMPILE([#include <wchar.h>
916 namespace test { using ::vwscanf; } ], [],
917 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
919 AC_TRY_COMPILE([#include <wchar.h>
920 namespace test { using ::wcstof; } ], [],
921 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
923 AC_TRY_COMPILE([#include <wctype.h>],
924 [ wint_t t; int i = iswblank(t);],
925 [AC_DEFINE(HAVE_ISWBLANK,1,
926 [Defined if iswblank exists.])],[])
928 AC_MSG_RESULT($ac_c99_wchar)
931 # Option parsed, now set things appropriately.
932 if test x"$ac_c99_math" = x"no" ||
933 test x"$ac_c99_complex" = x"no" ||
934 test x"$ac_c99_stdio" = x"no" ||
935 test x"$ac_c99_stdlib" = x"no" ||
936 test x"$ac_c99_wchar" = x"no"; then
939 AC_DEFINE(_GLIBCXX_USE_C99, 1,
940 [Define if C99 functions or macros from <wchar.h>, <math.h>,
941 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
947 AC_MSG_CHECKING([for fully enabled ISO C99 support])
948 AC_MSG_RESULT($enable_c99)
953 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
954 dnl facilities in Chapter 8, "C compatibility".
956 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
961 # Check for the existence of <complex.h> complex math functions used
963 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
964 ac_c99_complex_tr1=no;
965 if test x"$ac_has_complex_h" = x"yes"; then
966 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
967 AC_TRY_COMPILE([#include <complex.h>],
968 [typedef __complex__ float float_type; float_type tmpf;
975 typedef __complex__ double double_type; double_type tmpd;
982 typedef __complex__ long double ld_type; ld_type tmpld;
989 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
991 AC_MSG_RESULT($ac_c99_complex_tr1)
992 if test x"$ac_c99_complex_tr1" = x"yes"; then
993 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
994 [Define if C99 functions in <complex.h> should be used in
995 <tr1/complex>. Using compiler builtins for these functions
996 requires corresponding C99 library functions to be present.])
999 # Check for the existence of <ctype.h> functions.
1000 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1001 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1002 AC_TRY_COMPILE([#include <ctype.h>],
1006 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1008 AC_MSG_RESULT($ac_c99_ctype_tr1)
1009 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1010 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1011 [Define if C99 functions in <ctype.h> should be imported in
1012 <tr1/cctype> in namespace std::tr1.])
1015 # Check for the existence of <fenv.h> functions.
1016 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1018 if test x"$ac_has_fenv_h" = x"yes"; then
1019 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1020 AC_TRY_COMPILE([#include <fenv.h>],
1025 ret = feclearexcept(except);
1026 ret = fegetexceptflag(pflag, except);
1027 ret = feraiseexcept(except);
1028 ret = fesetexceptflag(pflag, except);
1029 ret = fetestexcept(except);
1031 ret = fesetround(mode);
1032 ret = fegetenv(penv);
1033 ret = feholdexcept(penv);
1034 ret = fesetenv(penv);
1035 ret = feupdateenv(penv);
1036 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1038 AC_MSG_RESULT($ac_c99_fenv_tr1)
1039 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1040 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1041 [Define if C99 functions in <fenv.h> should be imported in
1042 <tr1/cfenv> in namespace std::tr1.])
1045 # Check for the existence of <stdint.h> types.
1046 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1047 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1048 AC_TRY_COMPILE([#include <stdint.h>],
1049 [typedef int8_t my_int8_t;
1050 typedef int16_t my_int16_t;
1051 typedef int32_t my_int32_t;
1052 typedef int64_t my_int64_t;
1053 typedef int_fast8_t my_int_fast8_t;
1054 typedef int_fast16_t my_int_fast16_t;
1055 typedef int_fast32_t my_int_fast32_t;
1056 typedef int_fast64_t my_int_fast64_t;
1057 typedef int_least8_t my_int_least8_t;
1058 typedef int_least16_t my_int_least16_t;
1059 typedef int_least32_t my_int_least32_t;
1060 typedef int_least64_t my_int_least64_t;
1061 typedef intmax_t my_intmax_t;
1062 typedef intptr_t my_intptr_t;
1063 typedef uint8_t my_uint8_t;
1064 typedef uint16_t my_uint16_t;
1065 typedef uint32_t my_uint32_t;
1066 typedef uint64_t my_uint64_t;
1067 typedef uint_fast8_t my_uint_fast8_t;
1068 typedef uint_fast16_t my_uint_fast16_t;
1069 typedef uint_fast32_t my_uint_fast32_t;
1070 typedef uint_fast64_t my_uint_fast64_t;
1071 typedef uint_least8_t my_uint_least8_t;
1072 typedef uint_least16_t my_uint_least16_t;
1073 typedef uint_least32_t my_uint_least32_t;
1074 typedef uint_least64_t my_uint_least64_t;
1075 typedef uintmax_t my_uintmax_t;
1076 typedef uintptr_t my_uintptr_t;
1077 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1079 AC_MSG_RESULT($ac_c99_stdint_tr1)
1080 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1081 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1082 [Define if C99 types in <stdint.h> should be imported in
1083 <tr1/cstdint> in namespace std::tr1.])
1086 # Check for the existence of <math.h> functions.
1087 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1088 AC_CACHE_VAL(ac_c99_math_tr1, [
1089 AC_TRY_COMPILE([#include <math.h>],
1090 [typedef double_t my_double_t;
1091 typedef float_t my_float_t;
1105 copysignf(0.0f, 0.0f);
1106 copysignl(0.0l, 0.0l);
1123 fmaf(0.0f, 0.0f, 0.0f);
1124 fmal(0.0l, 0.0l, 0.0l);
1167 nextafter(0.0, 0.0);
1168 nextafterf(0.0f, 0.0f);
1169 nextafterl(0.0l, 0.0l);
1170 nexttoward(0.0, 0.0);
1171 nexttowardf(0.0f, 0.0f);
1172 nexttowardl(0.0l, 0.0l);
1173 remainder(0.0, 0.0);
1174 remainderf(0.0f, 0.0f);
1175 remainderl(0.0l, 0.0l);
1176 remquo(0.0, 0.0, 0);
1177 remquo(0.0f, 0.0f, 0);
1178 remquo(0.0l, 0.0l, 0);
1197 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1199 AC_MSG_RESULT($ac_c99_math_tr1)
1200 if test x"$ac_c99_math_tr1" = x"yes"; then
1201 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1202 [Define if C99 functions or macros in <math.h> should be imported
1203 in <tr1/cmath> in namespace std::tr1.])
1206 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1207 # sense if the previous check fails, per C99, 7.8/1).
1208 ac_c99_inttypes_tr1=no;
1209 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1210 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1211 AC_TRY_COMPILE([#include <inttypes.h>],
1212 [intmax_t i, numer, denom, base;
1215 intmax_t ret = imaxabs(i);
1216 imaxdiv_t dret = imaxdiv(numer, denom);
1217 ret = strtoimax(s, endptr, base);
1218 uintmax_t uret = strtoumax(s, endptr, base);
1219 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1221 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1222 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1223 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1224 [Define if C99 functions in <inttypes.h> should be imported in
1225 <tr1/cinttypes> in namespace std::tr1.])
1228 # Check for the existence of the <stdbool.h> header.
1229 AC_CHECK_HEADERS(stdbool.h)
1235 dnl Check whether "dev/random" and "dev/urandom" are available for the
1236 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1238 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1240 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1241 AC_CACHE_VAL(ac_random_tr1, [
1242 AC_TRY_RUN([#include <stdio.h>
1245 return !(fopen("/dev/random", "r")
1246 && fopen("/dev/urandom", "r"));
1249 [ac_random_tr1=yes], [ac_random_tr1=no],
1252 AC_MSG_RESULT($ac_random_tr1)
1253 if test x"$ac_random_tr1" = x"yes"; then
1254 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1255 [Define if dev/random and dev/urandom are available for
1256 the random_device of TR1 (Chapter 5.1).])
1262 dnl Check for what type of C headers to use.
1264 dnl --enable-cheaders= [does stuff].
1265 dnl --disable-cheaders [does not do anything, really].
1266 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1267 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1269 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1270 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1271 [construct "C" headers for g++], [permit c|c_std|c_global])
1272 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1274 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1276 # Allow overrides to configure.host here.
1277 if test $enable_cheaders = c_global; then
1281 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1285 AC_SUBST(C_INCLUDE_DIR)
1286 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1287 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1288 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1289 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1290 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1295 dnl Check for which locale library to use. The choice is mapped to
1296 dnl a subdirectory of config/locale.
1298 dnl Default is generic.
1300 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1301 AC_MSG_CHECKING([for C locale to use])
1302 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1303 [use MODEL for target locale package],
1304 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1306 # If they didn't use this option switch, or if they specified --enable
1307 # with no specific model, we'll have to look for one. If they
1308 # specified --disable (???), do likewise.
1309 if test $enable_clocale = no || test $enable_clocale = yes; then
1313 # Either a known package, or "auto"
1314 enable_clocale_flag=$enable_clocale
1316 # Probe for locale support if no specific model is specified.
1317 # Default to "generic".
1318 if test $enable_clocale_flag = auto; then
1319 case ${target_os} in
1320 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1321 AC_EGREP_CPP([_GLIBCXX_ok], [
1322 #include <features.h>
1323 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1326 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1328 # Test for bugs early in glibc-2.2.x series
1329 if test $enable_clocale_flag = gnu; then
1331 #define _GNU_SOURCE 1
1334 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1335 extern __typeof(newlocale) __newlocale;
1336 extern __typeof(duplocale) __duplocale;
1337 extern __typeof(strcoll_l) __strcoll_l;
1341 const char __one[] = "Äuglein Augmen";
1342 const char __two[] = "Äuglein";
1347 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1348 loc_dup = __duplocale(loc);
1349 i = __strcoll_l(__one, __two, loc);
1350 j = __strcoll_l(__one, __two, loc_dup);
1354 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1355 [enable_clocale_flag=generic])
1358 # ... at some point put __strxfrm_l tests in as well.
1361 enable_clocale_flag=darwin
1364 enable_clocale_flag=generic
1369 # Deal with gettext issues. Default to not using it (=no) until we detect
1370 # support for it later. Let the user turn it off via --e/d, but let that
1371 # default to on for easier handling.
1374 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1378 # Set configure bits for specified locale package
1379 case ${enable_clocale_flag} in
1381 AC_MSG_RESULT(generic)
1383 CLOCALE_H=config/locale/generic/c_locale.h
1384 CLOCALE_CC=config/locale/generic/c_locale.cc
1385 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1386 CCOLLATE_CC=config/locale/generic/collate_members.cc
1387 CCTYPE_CC=config/locale/generic/ctype_members.cc
1388 CMESSAGES_H=config/locale/generic/messages_members.h
1389 CMESSAGES_CC=config/locale/generic/messages_members.cc
1390 CMONEY_CC=config/locale/generic/monetary_members.cc
1391 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1392 CTIME_H=config/locale/generic/time_members.h
1393 CTIME_CC=config/locale/generic/time_members.cc
1394 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1397 AC_MSG_RESULT(darwin or freebsd)
1399 CLOCALE_H=config/locale/generic/c_locale.h
1400 CLOCALE_CC=config/locale/generic/c_locale.cc
1401 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1402 CCOLLATE_CC=config/locale/generic/collate_members.cc
1403 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1404 CMESSAGES_H=config/locale/generic/messages_members.h
1405 CMESSAGES_CC=config/locale/generic/messages_members.cc
1406 CMONEY_CC=config/locale/generic/monetary_members.cc
1407 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1408 CTIME_H=config/locale/generic/time_members.h
1409 CTIME_CC=config/locale/generic/time_members.cc
1410 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1416 # Declare intention to use gettext, and add support for specific
1418 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1421 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1422 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1423 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1426 # Export the build objects.
1427 for ling in $ALL_LINGUAS; do \
1428 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1429 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1431 AC_SUBST(glibcxx_MOFILES)
1432 AC_SUBST(glibcxx_POFILES)
1434 CLOCALE_H=config/locale/gnu/c_locale.h
1435 CLOCALE_CC=config/locale/gnu/c_locale.cc
1436 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1437 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1438 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1439 CMESSAGES_H=config/locale/gnu/messages_members.h
1440 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1441 CMONEY_CC=config/locale/gnu/monetary_members.cc
1442 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1443 CTIME_H=config/locale/gnu/time_members.h
1444 CTIME_CC=config/locale/gnu/time_members.cc
1445 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1448 AC_MSG_RESULT(IEEE 1003.1)
1450 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1451 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1452 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1453 CCOLLATE_CC=config/locale/generic/collate_members.cc
1454 CCTYPE_CC=config/locale/generic/ctype_members.cc
1455 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1456 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1457 CMONEY_CC=config/locale/generic/monetary_members.cc
1458 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1459 CTIME_H=config/locale/generic/time_members.h
1460 CTIME_CC=config/locale/generic/time_members.cc
1461 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1465 # This is where the testsuite looks for locale catalogs, using the
1466 # -DLOCALEDIR define during testsuite compilation.
1467 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1468 AC_SUBST(glibcxx_localedir)
1470 # A standalone libintl (e.g., GNU libintl) may be in use.
1471 if test $USE_NLS = yes; then
1472 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1473 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1475 if test $USE_NLS = yes; then
1476 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1477 [Define if NLS translations are to be used.])
1482 AC_SUBST(CMESSAGES_H)
1483 AC_SUBST(CCODECVT_CC)
1484 AC_SUBST(CCOLLATE_CC)
1486 AC_SUBST(CMESSAGES_CC)
1488 AC_SUBST(CNUMERIC_CC)
1491 AC_SUBST(CLOCALE_CC)
1492 AC_SUBST(CLOCALE_INTERNAL_H)
1497 dnl Check for which std::allocator base class to use. The choice is
1498 dnl mapped from a subdirectory of include/ext.
1502 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1503 AC_MSG_CHECKING([for std::allocator base class])
1504 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1505 [use KIND for target std::allocator base],
1506 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1508 # If they didn't use this option switch, or if they specified --enable
1509 # with no specific model, we'll have to look for one. If they
1510 # specified --disable (???), do likewise.
1511 if test $enable_libstdcxx_allocator = no ||
1512 test $enable_libstdcxx_allocator = yes;
1514 enable_libstdcxx_allocator=auto
1517 # Either a known package, or "auto". Auto implies the default choice
1518 # for a particular platform.
1519 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1521 # Probe for host-specific support if no specific model is specified.
1523 if test $enable_libstdcxx_allocator_flag = auto; then
1524 case ${target_os} in
1525 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1526 enable_libstdcxx_allocator_flag=new
1529 enable_libstdcxx_allocator_flag=new
1533 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1536 # Set configure bits for specified locale package
1537 case ${enable_libstdcxx_allocator_flag} in
1539 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1540 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1543 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1544 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1547 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1548 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1551 ALLOCATOR_H=config/allocator/new_allocator_base.h
1552 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1555 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1556 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1560 AC_SUBST(ALLOCATOR_H)
1561 AC_SUBST(ALLOCATOR_NAME)
1566 dnl Check for whether the Boost-derived checks should be turned on.
1568 dnl --enable-concept-checks turns them on.
1569 dnl --disable-concept-checks leaves them off.
1570 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1571 dnl Where DEFAULT is either `yes' or `no'.
1573 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1574 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1575 if test $enable_concept_checks = yes; then
1576 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1577 [Define to use concept checking code from the boost libraries.])
1583 dnl Check for which I/O library to use: stdio, or something specific.
1585 dnl Default is stdio.
1587 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1588 AC_MSG_CHECKING([for underlying I/O to use])
1589 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1590 [use target-specific I/O package], [permit stdio])
1592 # Now that libio has been removed, you can have any color you want as long
1593 # as it's black. This is one big no-op until other packages are added, but
1594 # showing the framework never hurts.
1595 case ${enable_cstdio} in
1597 CSTDIO_H=config/io/c_io_stdio.h
1598 BASIC_FILE_H=config/io/basic_file_stdio.h
1599 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1600 AC_MSG_RESULT(stdio)
1605 AC_SUBST(BASIC_FILE_H)
1606 AC_SUBST(BASIC_FILE_CC)
1611 dnl Check for "unusual" flags to pass to the compiler while building.
1613 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1614 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1615 dnl --disable-cxx-flags passes nothing.
1616 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1617 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1618 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1619 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1620 dnl If "default flags" is an empty string, the effect is the same
1621 dnl as --disable or --enable=no.
1623 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1624 AC_MSG_CHECKING([for extra compiler flags for building])
1625 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1626 [pass compiler FLAGS when building library],
1627 [case "x$enable_cxx_flags" in
1628 xno | x) enable_cxx_flags= ;;
1630 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1633 # Run through flags (either default or command-line) and set anything
1634 # extra (e.g., #defines) that must accompany particular g++ options.
1635 if test -n "$enable_cxx_flags"; then
1636 for f in $enable_cxx_flags; do
1640 *) # and we're trying to pass /what/ exactly?
1641 AC_MSG_ERROR([compiler flags start with a -]) ;;
1646 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1647 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1648 AC_SUBST(EXTRA_CXX_FLAGS)
1653 dnl Check to see if debugging libraries are to be built.
1655 dnl --enable-libstdcxx-debug
1656 dnl builds a separate set of debugging libraries in addition to the
1657 dnl normal (shared, static) libstdc++ binaries.
1659 dnl --disable-libstdcxx-debug
1660 dnl builds only one (non-debug) version of libstdc++.
1662 dnl --enable-libstdcxx-debug-flags=FLAGS
1663 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1665 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1666 dnl Where DEFAULT is either `yes' or `no'.
1668 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1669 AC_MSG_CHECKING([for additional debug build])
1670 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1671 AC_MSG_RESULT($enable_libstdcxx_debug)
1672 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1677 dnl Check for explicit debug flags.
1679 dnl --enable-libstdcxx-debug-flags='-O1'
1680 dnl is a general method for passing flags to be used when
1681 dnl building debug libraries with --enable-debug.
1683 dnl --disable-libstdcxx-debug-flags does nothing.
1684 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1685 dnl If "default flags" is an empty string, the effect is the same
1686 dnl as --disable or --enable=no.
1688 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1689 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1690 [pass compiler FLAGS when building debug library],
1691 [case "x$enable_libstdcxx_debug_flags" in
1692 xno | x) enable_libstdcxx_debug_flags= ;;
1694 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1697 # Option parsed, now set things appropriately
1698 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1699 AC_SUBST(DEBUG_FLAGS)
1701 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1706 dnl Check if the user only wants a freestanding library implementation.
1708 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1709 dnl installing only the headers required by [17.4.1.3] and the language
1710 dnl support library. More than that will be built (to keep the Makefiles
1711 dnl conveniently clean), but not installed.
1714 dnl is_hosted (yes/no)
1717 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1719 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1720 AC_ARG_ENABLE([hosted-libstdcxx],
1721 AC_HELP_STRING([--disable-hosted-libstdcxx],
1722 [only build freestanding C++ runtime support]),,
1725 enable_hosted_libstdcxx=no
1728 enable_hosted_libstdcxx=yes
1731 if test "$enable_hosted_libstdcxx" = no; then
1732 AC_MSG_NOTICE([Only freestanding libraries will be built])
1736 enable_libstdcxx_pch=no
1741 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1742 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1743 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1748 dnl Check for template specializations for the 'long long' type.
1749 dnl The result determines only whether 'long long' I/O is enabled; things
1750 dnl like numeric_limits<> specializations are always available.
1752 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1753 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1754 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1755 dnl Where DEFAULT is either `yes' or `no'.
1757 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1758 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1759 if test $enable_long_long = yes; then
1760 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1761 [Define if code specialized for long long should be used.])
1763 AC_MSG_CHECKING([for enabled long long specializations])
1764 AC_MSG_RESULT([$enable_long_long])
1769 dnl Check for template specializations for the 'wchar_t' type.
1771 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1772 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1773 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1774 dnl Where DEFAULT is either `yes' or `no'.
1776 dnl Necessary support must also be present.
1778 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1779 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1781 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1782 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1783 AC_MSG_CHECKING([for mbstate_t])
1784 AC_TRY_COMPILE([#include <wchar.h>],
1785 [mbstate_t teststate;],
1786 have_mbstate_t=yes, have_mbstate_t=no)
1787 AC_MSG_RESULT($have_mbstate_t)
1788 if test x"$have_mbstate_t" = xyes; then
1789 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1792 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1794 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1796 if test x"$enable_wchar_t" = x"yes"; then
1801 if test x"$ac_has_wchar_h" = xyes &&
1802 test x"$ac_has_wctype_h" = xyes; then
1803 AC_TRY_COMPILE([#include <wchar.h>
1864 ],[],[], [enable_wchar_t=no])
1872 if test x"$enable_wchar_t" = x"yes"; then
1873 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1874 [Define if code specialized for wchar_t should be used.])
1877 AC_MSG_CHECKING([for enabled wchar_t specializations])
1878 AC_MSG_RESULT([$enable_wchar_t])
1883 dnl Check to see if building and using a C++ precompiled header can be done.
1885 dnl --enable-libstdcxx-pch=yes
1886 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1887 dnl may work, after some light-hearted attempts to puzzle out compiler
1888 dnl support, flip bits on in include/Makefile.am
1890 dnl --disable-libstdcxx-pch
1891 dnl turns off attempts to use or build stdc++.h.gch.
1894 dnl glibcxx_PCHFLAGS
1896 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1897 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1898 if test $enable_libstdcxx_pch = yes; then
1899 AC_CACHE_CHECK([for compiler with PCH support],
1900 [glibcxx_cv_prog_CXX_pch],
1901 [ac_save_CXXFLAGS="$CXXFLAGS"
1902 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1905 echo '#include <math.h>' > conftest.h
1906 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1907 -o conftest.h.gch 1>&5 2>&1 &&
1908 echo '#error "pch failed"' > conftest.h &&
1909 echo '#include "conftest.h"' > conftest.cc &&
1910 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1912 glibcxx_cv_prog_CXX_pch=yes
1914 glibcxx_cv_prog_CXX_pch=no
1917 CXXFLAGS=$ac_save_CXXFLAGS
1920 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1923 AC_MSG_CHECKING([for enabled PCH])
1924 AC_MSG_RESULT([$enable_libstdcxx_pch])
1926 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1927 if test $enable_libstdcxx_pch = yes; then
1928 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
1932 AC_SUBST(glibcxx_PCHFLAGS)
1937 dnl Check for atomic builtins.
1939 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
1941 dnl This checks to see if the host supports the compiler-generated
1942 dnl builtins for atomic operations. Note, this is intended to be an
1943 dnl all-or-nothing switch, so all the atomic operations that are used
1944 dnl should be checked.
1947 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
1948 dnl see: CHECK_SYNC_FETCH_AND_ADD
1951 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
1953 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
1954 AC_MSG_CHECKING([for atomic builtins])
1958 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1959 cat > conftest.$ac_ext << EOF
1960 [#]line __oline__ "configure"
1963 // NB: _Atomic_word not necessarily int.
1964 typedef int atomic_type;
1967 const atomic_type c3(0);
1968 if (__sync_fetch_and_add(&c1, c2) == c3)
1975 old_CXXFLAGS="$CXXFLAGS"
1977 if AC_TRY_EVAL(ac_compile); then
1978 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
1979 enable_atomic_builtins=no
1981 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
1982 [Define if builtin atomic operations are supported on this host.])
1983 enable_atomic_builtins=yes
1984 atomicity_dir=cpu/generic/atomicity_builtins
1987 CXXFLAGS="$old_CXXFLAGS"
1990 # Now, if still generic, set to mutex.
1991 if test $atomicity_dir = "cpu/generic" ; then
1992 atomicity_dir=cpu/generic/atomicity_mutex
1995 AC_MSG_RESULT($enable_atomic_builtins)
2000 dnl Check for exception handling support. If an explicit enable/disable
2001 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2002 dnl target may or may not support call frame exceptions.
2004 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2005 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2006 dnl Neither one forces an attempt at detection.
2009 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2011 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2012 AC_MSG_CHECKING([for exception model to use])
2015 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2016 [force use of builtin_setjmp for exceptions],
2017 [permit yes|no|auto])
2019 if test $enable_sjlj_exceptions = auto; then
2020 # Botheration. Now we've got to detect the exception model. Link tests
2021 # against libgcc.a are problematic since we've not been given proper -L
2022 # bits for single-tree newlib and libgloss.
2024 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2025 cat > conftest.$ac_ext << EOF
2026 [#]line __oline__ "configure"
2035 old_CXXFLAGS="$CXXFLAGS"
2037 if AC_TRY_EVAL(ac_compile); then
2038 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2039 enable_sjlj_exceptions=yes
2040 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2041 enable_sjlj_exceptions=no
2042 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2043 enable_sjlj_exceptions=no
2046 CXXFLAGS="$old_CXXFLAGS"
2050 # This is a tad weird, for hysterical raisins. We have to map
2051 # enable/disable to two different models.
2052 case $enable_sjlj_exceptions in
2054 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2055 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2056 ac_exception_model_name=sjlj
2059 ac_exception_model_name="call frame"
2062 AC_MSG_ERROR([unable to detect exception model])
2066 AC_MSG_RESULT($ac_exception_model_name)
2071 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2073 dnl --enable-visibility enables attempt to use visibility attributes.
2074 dnl --disable-visibility turns off all use of visibility attributes.
2075 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2076 dnl Where DEFAULT is 'yes'.
2078 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2079 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2081 if test x$enable_visibility = xyes ; then
2082 dnl all hail libgfortran
2083 dnl Check whether the target supports hidden visibility.
2084 AC_CACHE_CHECK([whether the target supports hidden visibility],
2085 have_attribute_visibility, [
2086 save_CFLAGS="$CFLAGS"
2087 CFLAGS="$CFLAGS -Werror"
2088 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2089 [], have_attribute_visibility=yes,
2090 have_attribute_visibility=no)
2091 CFLAGS="$save_CFLAGS"])
2092 if test $have_attribute_visibility = no; then
2093 enable_visibility=no
2097 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2098 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2103 dnl Add version tags to symbols in shared library (or not), additionally
2104 dnl marking other symbols as private/local (or not).
2106 dnl --enable-symvers=style adds a version script to the linker call when
2107 dnl creating the shared library. The choice of version script is
2108 dnl controlled by 'style'.
2109 dnl --disable-symvers does not.
2110 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2111 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2112 dnl choose a default style based on linker characteristics. Passing
2113 dnl 'no' disables versioning.
2115 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2117 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2118 [enables symbol versioning of the shared library],
2119 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2121 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2122 # don't know enough about $LD to do tricks...
2123 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2125 # Turn a 'yes' into a suitable default.
2126 if test x$enable_symvers = xyes ; then
2127 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2130 if test $with_gnu_ld = yes ; then
2133 case ${target_os} in
2135 enable_symvers=darwin ;;
2137 enable_symvers=no ;;
2143 # Check to see if 'darwin' or 'darwin-export' can win.
2144 if test x$enable_symvers = xdarwin-export ; then
2145 enable_symvers=darwin
2148 # Check to see if 'gnu' can win.
2149 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2150 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2151 AC_MSG_CHECKING([for shared libgcc])
2152 ac_save_CFLAGS="$CFLAGS"
2154 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2155 CFLAGS="$ac_save_CFLAGS"
2156 if test $glibcxx_shared_libgcc = no; then
2157 cat > conftest.c <<EOF
2158 int main (void) { return 0; }
2161 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2162 -shared -shared-libgcc -o conftest.so \
2163 conftest.c -v 2>&1 >/dev/null \
2164 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2166 rm -f conftest.c conftest.so
2167 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2168 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2169 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2170 CFLAGS="$ac_save_CFLAGS"
2173 AC_MSG_RESULT($glibcxx_shared_libgcc)
2175 # For GNU ld, we need at least this version. The format is described in
2176 # GLIBCXX_CHECK_LINKER_FEATURES above.
2177 glibcxx_min_gnu_ld_version=21400
2179 # If no shared libgcc, can't win.
2180 if test $glibcxx_shared_libgcc != yes; then
2181 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2182 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2183 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2185 elif test $with_gnu_ld != yes ; then
2187 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2188 AC_MSG_WARN([=== you are not using the GNU linker.])
2189 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2191 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2192 # The right tools, the right setup, but too old. Fallbacks?
2193 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2194 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2195 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2196 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2197 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2202 # Everything parsed; figure out what file to use.
2203 case $enable_symvers in
2205 SYMVER_FILE=config/abi/pre/none.ver
2208 SYMVER_FILE=config/abi/pre/gnu.ver
2209 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2210 [Define to use GNU versioning in the shared library.])
2212 gnu-versioned-namespace)
2213 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2214 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2215 [Define to use GNU namespace versioning in the shared library.])
2218 SYMVER_FILE=config/abi/pre/gnu.ver
2219 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2220 [Define to use darwin versioning in the shared library.])
2224 if test x$enable_symvers != xno ; then
2225 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2226 [Define to use symbol versioning in the shared library.])
2229 AC_SUBST(SYMVER_FILE)
2230 AC_SUBST(port_specific_symbol_files)
2231 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2232 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2233 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2234 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2235 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2237 # Now, set up compatibility support, if any.
2238 # In addition, need this to deal with std::size_t mangling in
2239 # src/compatibility.cc. In a perfect world, could use
2240 # typeid(std::size_t).name()[0] to do direct substitution.
2241 AC_MSG_CHECKING([for size_t as unsigned int])
2242 ac_save_CFLAGS="$CFLAGS"
2244 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2245 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2246 CFLAGS=$ac_save_CFLAGS
2247 if test "$glibcxx_size_t_is_i" = yes; then
2248 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2250 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2252 AC_MSG_CHECKING([for ptrdiff_t as int])
2253 ac_save_CFLAGS="$CFLAGS"
2255 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2256 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2257 CFLAGS=$ac_save_CFLAGS
2258 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2259 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2261 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2266 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2267 dnl We must stage the required headers so that they will be installed
2268 dnl with the library (unlike libgcc, the STL implementation is provided
2269 dnl solely within headers). Since we must not inject random user-space
2270 dnl macro names into user-provided C++ code, we first stage into <file>-in
2271 dnl and process to <file> with an output command. The reason for a two-
2272 dnl stage process here is to correctly handle $srcdir!=$objdir without
2273 dnl having to write complex code (the sed commands to clean the macro
2274 dnl namespace are complex and fragile enough as it is). We must also
2275 dnl add a relative path so that -I- is supported properly.
2278 dnl glibcxx_thread_h
2281 dnl HAVE_GTHR_DEFAULT
2283 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2284 AC_MSG_CHECKING([for thread model used by GCC])
2285 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2286 AC_MSG_RESULT([$target_thread_file])
2288 if test $target_thread_file != single; then
2289 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2290 [Define if gthr-default.h exists
2291 (meaning that threading support is enabled).])
2294 glibcxx_thread_h=gthr-$target_thread_file.h
2296 dnl Check for __GTHREADS define.
2297 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2298 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2304 AC_SUBST(glibcxx_thread_h)
2308 # Check whether LC_MESSAGES is available in <locale.h>.
2309 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2311 # This file file be copied and used freely without restrictions. It can
2312 # be used in projects which are not available under the GNU Public License
2313 # but which still want to provide support for the GNU gettext functionality.
2314 # Please note that the actual code is *not* freely available.
2317 AC_DEFUN([AC_LC_MESSAGES], [
2318 AC_CHECK_HEADER(locale.h, [
2319 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2320 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2321 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2322 if test $ac_cv_val_LC_MESSAGES = yes; then
2323 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2324 [Define if LC_MESSAGES is available in <locale.h>.])
2329 # Macros from the top-level gcc directory.
2330 m4_include([../config/tls.m4])