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 # Find platform-specific directories containing configuration info.
129 # Also possibly modify flags used elsewhere, as needed by the platform.
134 m4_include([linkage.m4])
135 m4_include([../config/no-executables.m4])
139 dnl Tests for newer compiler features, or features that are present in newer
140 dnl compiler versions but not older compiler versions still in use, should
144 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
145 dnl new inlining code or the new system_header pragma will die on -Werror.
146 dnl Leave it out by default and use maint-mode to use it.
147 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
148 dnl compiler supports it and the user has not requested debug mode.
150 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
151 # All these tests are for C++; save the language and the compiler flags.
152 # The CXXFLAGS thing is suspicious, but based on similar bits previously
153 # found in GLIBCXX_CONFIGURE.
156 ac_test_CXXFLAGS="${CXXFLAGS+set}"
157 ac_save_CXXFLAGS="$CXXFLAGS"
159 # Check for maintainer-mode bits.
160 if test x"$USE_MAINTAINER_MODE" = xno; then
166 # Check for -ffunction-sections -fdata-sections
167 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
168 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
169 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
170 if test "$ac_test_CXXFLAGS" = set; then
171 CXXFLAGS="$ac_save_CXXFLAGS"
173 # this is the suspicious part
176 if test x"$ac_fdsections" = x"yes"; then
177 SECTION_FLAGS='-ffunction-sections -fdata-sections'
179 AC_MSG_RESULT($ac_fdsections)
183 AC_SUBST(SECTION_FLAGS)
188 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
189 dnl the native linker is in use, all variables will be defined to something
190 dnl safe (like an empty string).
193 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
194 dnl OPT_LDFLAGS='-Wl,-O1' if possible
195 dnl LD (as a side effect of testing)
198 dnl glibcxx_gnu_ld_version (possibly)
200 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
201 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
203 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
204 # If we're not using GNU ld, then there's no point in even trying these
205 # tests. Check for that first. We should have already tested for gld
206 # by now (in libtool), but require it now just to be safe...
207 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
208 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
209 AC_REQUIRE([AC_PROG_LD])
210 AC_REQUIRE([AC_PROG_AWK])
212 # The name set by libtool depends on the version of libtool. Shame on us
213 # for depending on an impl detail, but c'est la vie. Older versions used
214 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
215 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
216 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
217 # set (hence we're using an older libtool), then set it.
218 if test x${with_gnu_ld+set} != xset; then
219 if test x${ac_cv_prog_gnu_ld+set} != xset; then
220 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
223 with_gnu_ld=$ac_cv_prog_gnu_ld
227 # Start by getting the version number. I think the libtool test already
228 # does some of this, but throws away the result.
230 ldver=`$LD --version 2>/dev/null | head -1 | \
231 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
233 glibcxx_gnu_ld_version=`echo $ldver | \
234 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
237 if test "$with_gnu_ld" = "notbroken"; then
238 # GNU ld it is! Joy and bunny rabbits!
240 # All these tests are for C++; save the language and the compiler flags.
241 # Need to do this so that g++ won't try to link in libstdc++
242 ac_test_CFLAGS="${CFLAGS+set}"
243 ac_save_CFLAGS="$CFLAGS"
244 CFLAGS='-x c++ -Wl,--gc-sections'
246 # Check for -Wl,--gc-sections
247 # XXX This test is broken at the moment, as symbols required for linking
248 # are now in libsupc++ (not built yet). In addition, this test has
249 # cored on solaris in the past. In addition, --gc-sections doesn't
250 # really work at the moment (keeps on discarding used sections, first
251 # .eh_frame and now some of the glibc sections for iconv).
252 # Bzzzzt. Thanks for playing, maybe next time.
253 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
261 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
262 if test "$ac_test_CFLAGS" = set; then
263 CFLAGS="$ac_save_CFLAGS"
265 # this is the suspicious part
268 if test "$ac_sectionLDflags" = "yes"; then
269 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
271 AC_MSG_RESULT($ac_sectionLDflags)
274 # Set linker optimization flags.
275 if test x"$with_gnu_ld" = x"yes"; then
276 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
279 AC_SUBST(SECTION_LDFLAGS)
280 AC_SUBST(OPT_LDFLAGS)
285 dnl Check to see if this target can enable the iconv specializations.
286 dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
287 dnl (This must have been previously checked, along with the rest of C99
288 dnl support.) By default, iconv support is disabled.
291 dnl _GLIBCXX_USE_ICONV if all the bits are found.
293 dnl LIBICONV to a -l string containing the iconv library, if needed.
295 AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
298 # Only continue checking if the ISO C99 headers exist and support is on.
299 if test x"$enable_wchar_t" = xyes; then
301 # Use iconv for wchar_t to char conversions. As such, check for
302 # X/Open Portability Guide, version 2 features (XPG2).
303 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
304 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
306 # Check for existence of libiconv.a providing XPG2 wchar_t support.
307 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
309 LIBS="$LIBS $LIBICONV"
312 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
313 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
317 if test x"$ac_has_iconv_h" = xyes &&
318 test x"$ac_has_langinfo_h" = xyes &&
319 test x"$ac_XPG2funcs" = xyes;
321 AC_DEFINE([_GLIBCXX_USE_ICONV],1,
322 [Define if iconv and related functions exist and are usable.])
326 AC_MSG_CHECKING([for enabled iconv specializations])
327 AC_MSG_RESULT($enable_iconv)
332 dnl Check for headers for, and arguments to, the setrlimit() function.
333 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
336 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
337 dnl various HAVE_LIMIT_* for individual limit names
339 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
342 #include <sys/time.h>
343 #include <sys/resource.h>
345 [ int f = RLIMIT_$1 ; ],
346 [glibcxx_mresult=1], [glibcxx_mresult=0])
347 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
348 [Only used in build directory testsuite_hooks.h.])
351 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
352 setrlimit_have_headers=yes
353 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
355 [setrlimit_have_headers=no])
356 # If don't have the headers, then we can't run the tests now, and we
357 # won't be seeing any of these during testsuite compilation.
358 if test $setrlimit_have_headers = yes; then
359 # Can't do these in a loop, else the resulting syntax is wrong.
360 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
361 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
362 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
363 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
364 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
366 # Check for rlimit, setrlimit.
367 AC_CACHE_VAL(ac_setrlimit, [
370 #include <sys/time.h>
371 #include <sys/resource.h>
375 [ac_setrlimit=yes], [ac_setrlimit=no])
379 AC_MSG_CHECKING([for testsuite resource limits support])
380 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
382 AC_DEFINE(_GLIBCXX_RES_LIMITS)
386 AC_MSG_RESULT($ac_res_limits)
391 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
392 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
394 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
395 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
397 [#include <sys/stat.h>],
400 S_ISREG(buffer.st_mode);],
401 [glibcxx_cv_S_ISREG=yes],
402 [glibcxx_cv_S_ISREG=no])
404 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
406 [#include <sys/stat.h>],
409 S_IFREG & buffer.st_mode;],
410 [glibcxx_cv_S_IFREG=yes],
411 [glibcxx_cv_S_IFREG=no])
413 if test $glibcxx_cv_S_ISREG = yes; then
414 AC_DEFINE(HAVE_S_ISREG)
415 elif test $glibcxx_cv_S_IFREG = yes; then
416 AC_DEFINE(HAVE_S_IFREG)
422 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
424 AC_DEFUN([GLIBCXX_CHECK_POLL], [
425 AC_CACHE_VAL(glibcxx_cv_POLL, [
428 [struct pollfd pfd[1];
429 pfd[0].events = POLLIN;
431 [glibcxx_cv_POLL=yes],
432 [glibcxx_cv_POLL=no])
434 if test $glibcxx_cv_POLL = yes; then
441 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
443 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
444 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
446 [#include <sys/uio.h>],
447 [struct iovec iov[2];
449 [glibcxx_cv_WRITEV=yes],
450 [glibcxx_cv_WRITEV=no])
452 if test $glibcxx_cv_WRITEV = yes; then
453 AC_DEFINE(HAVE_WRITEV)
459 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
461 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
462 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
464 [#include <stdint.h>],
466 [glibcxx_cv_INT64_T=yes],
467 [glibcxx_cv_INT64_T=no])
469 if test $glibcxx_cv_INT64_T = yes; then
470 AC_DEFINE(HAVE_INT64_T)
476 dnl Check whether LFS support is available.
478 AC_DEFUN([GLIBCXX_CHECK_LFS], [
481 ac_save_CXXFLAGS="$CXXFLAGS"
482 CXXFLAGS="$CXXFLAGS -fno-exceptions"
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 $glibcxx_cv_LFS = yes; then
500 AC_DEFINE(_GLIBCXX_USE_LFS)
502 CXXFLAGS="$ac_save_CXXFLAGS"
508 dnl Check for whether a fully dynamic basic_string implementation should
509 dnl be turned on, that does not put empty objects in per-process static
510 dnl memory (mostly useful together with shared memory allocators, see PR
511 dnl libstdc++/16612 for details).
513 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
514 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
515 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
516 dnl Where DEFAULT is either `yes' or `no'.
518 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
519 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
520 if test $enable_fully_dynamic_string = yes; then
521 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING)
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.
533 dnl enable_abi_check / GLIBCXX_TEST_ABI
534 dnl GLIBCXX_TEST_WCHAR_T
535 dnl GLIBCXX_TEST_THREAD
539 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
540 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; 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)
547 if test $enable_symvers = no; then
552 enable_abi_check=no ;;
554 enable_abi_check=yes ;;
558 # Only build this as native, since automake does not understand
563 # Export file names for ABI checking.
564 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
565 AC_SUBST(baseline_dir)
567 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
568 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_THREAD, test $enable_thread = yes)
569 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
574 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
578 dnl TOPLEVEL_INCLUDES
580 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
581 # Used for every C++ compile we perform.
583 -I$glibcxx_builddir/include/$host_alias \
584 -I$glibcxx_builddir/include \
585 -I$glibcxx_srcdir/libsupc++"
587 # For Canadian crosses, pick this up too.
588 if test $CANADIAN = yes; then
589 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
592 # Stuff in the actual top level. Currently only used by libsupc++ to
593 # get unwind* headers from the gcc dir.
594 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
595 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
597 # Now, export this to all the little Makefiles....
598 AC_SUBST(GLIBCXX_INCLUDES)
599 AC_SUBST(TOPLEVEL_INCLUDES)
604 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
605 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
608 dnl OPTIMIZE_CXXFLAGS
611 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
612 # Optimization flags that are probably a good idea for thrill-seekers. Just
613 # uncomment the lines below and make, everything else is ready to go...
614 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
616 AC_SUBST(OPTIMIZE_CXXFLAGS)
618 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
624 dnl All installation directory information is determined here.
628 dnl glibcxx_prefixdir
629 dnl glibcxx_toolexecdir
630 dnl glibcxx_toolexeclibdir
632 dnl Assumes cross_compiling bits already done, and with_cross_host in
635 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
636 glibcxx_toolexecdir=no
637 glibcxx_toolexeclibdir=no
638 glibcxx_prefixdir=$prefix
640 AC_MSG_CHECKING([for gxx-include-dir])
641 AC_ARG_WITH([gxx-include-dir],
642 AC_HELP_STRING([--with-gxx-include-dir=DIR],
643 [installation directory for include files]),
645 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
646 no) gxx_include_dir=no ;;
647 *) gxx_include_dir=$withval ;;
649 [gxx_include_dir=no])
650 AC_MSG_RESULT($gxx_include_dir)
652 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
653 AC_ARG_ENABLE([version-specific-runtime-libs],
654 AC_HELP_STRING([--enable-version-specific-runtime-libs],
655 [Specify that runtime libraries should be installed in a compiler-specific directory]),
656 [case "$enableval" in
657 yes) version_specific_libs=yes ;;
658 no) version_specific_libs=no ;;
659 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
661 [version_specific_libs=no])
662 AC_MSG_RESULT($version_specific_libs)
664 # Default case for install directory for include files.
665 if test $version_specific_libs = no && test $gxx_include_dir = no; then
666 gxx_include_dir='${prefix}/include/c++/${gcc_version}'
669 # Version-specific runtime libs processing.
670 if test $version_specific_libs = yes; then
671 # Need the gcc compiler version to know where to install libraries
672 # and header files if --enable-version-specific-runtime-libs option
673 # is selected. FIXME: these variables are misnamed, there are
674 # no executables installed in _toolexecdir or _toolexeclibdir.
675 if test x"$gxx_include_dir" = x"no"; then
676 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
678 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
679 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
682 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
683 # Install a library built with a cross compiler in tooldir, not libdir.
684 if test x"$glibcxx_toolexecdir" = x"no"; then
685 if test -n "$with_cross_host" &&
686 test x"$with_cross_host" != x"no"; then
687 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
688 glibcxx_toolexeclibdir='${toolexecdir}/lib'
690 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
691 glibcxx_toolexeclibdir='${libdir}'
693 multi_os_directory=`$CXX -print-multi-os-directory`
694 case $multi_os_directory in
695 .) ;; # Avoid trailing /.
696 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
700 AC_MSG_CHECKING([for install location])
701 AC_MSG_RESULT($gxx_include_dir)
703 AC_SUBST(glibcxx_prefixdir)
704 AC_SUBST(gxx_include_dir)
705 AC_SUBST(glibcxx_toolexecdir)
706 AC_SUBST(glibcxx_toolexeclibdir)
712 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
713 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
714 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
716 dnl See docs/html/17_intro/configury.html#enable for documentation.
718 m4_define([GLIBCXX_ENABLE],[dnl
719 m4_define([_g_switch],[--enable-$1])dnl
720 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
721 AC_ARG_ENABLE($1,_g_help,
726 m4_bpatsubst([$5],[permit ])) ;;
727 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
728 dnl Idea for future: generate a URL pointing to
729 dnl "onlinedocs/configopts.html#whatever"
736 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
740 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
741 m4_undefine([_g_switch])dnl
742 m4_undefine([_g_help])dnl
747 dnl Check for ISO/IEC 9899:1999 "C99" support.
749 dnl --enable-c99 defines _GLIBCXX_USE_C99
750 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
751 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
752 dnl Where DEFAULT is either `yes' or `no'.
753 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
755 AC_DEFUN([GLIBCXX_ENABLE_C99], [
756 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
758 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos
759 # even if C99 support is turned off.
760 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
761 AC_MSG_CHECKING([for mbstate_t])
762 AC_TRY_COMPILE([#include <wchar.h>],
763 [mbstate_t teststate;],
764 have_mbstate_t=yes, have_mbstate_t=no)
765 AC_MSG_RESULT($have_mbstate_t)
766 if test x"$have_mbstate_t" = xyes; then
767 AC_DEFINE(HAVE_MBSTATE_T)
770 if test x"$enable_c99" = x"yes"; then
775 # Check for the existence of <math.h> functions used if C99 is enabled.
776 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
777 AC_CACHE_VAL(ac_c99_math, [
778 AC_TRY_COMPILE([#include <math.h>],
786 isgreaterequal(0.0,0.0);
788 islessequal(0.0,0.0);
789 islessgreater(0.0,0.0);
790 islessgreater(0.0,0.0);
791 isunordered(0.0,0.0);
792 ],[ac_c99_math=yes], [ac_c99_math=no])
794 AC_MSG_RESULT($ac_c99_math)
795 if test x"$ac_c99_math" = x"yes"; then
796 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
799 # Check for the existence of <complex.h> complex functions.
800 # This is necessary even though libstdc++ uses the builtin versions
801 # of these functions, because if the builtin cannot be used, a reference
802 # to the library function is emitted.
803 # In addition, need to explicitly specify "C" compilation for this
804 # one, or else the backwards C++ <complex.h> include will be selected.
805 save_CXXFLAGS="$CXXFLAGS"
806 CXXFLAGS="$CXXFLAGS -x c"
807 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
809 if test x"$ac_has_complex_h" = x"yes"; then
810 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
811 AC_TRY_COMPILE([#include <complex.h>],
812 [typedef __complex__ float float_type; float_type tmpf;
824 typedef __complex__ double double_type; double_type tmpd;
836 typedef __complex__ long double ld_type; ld_type tmpld;
848 ],[ac_c99_complex=yes], [ac_c99_complex=no])
850 CXXFLAGS="$save_CXXFLAGS"
851 AC_MSG_RESULT($ac_c99_complex)
852 if test x"$ac_c99_complex" = x"yes"; then
853 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX)
856 # Check for the existence in <stdio.h> of vscanf, et. al.
857 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
858 AC_CACHE_VAL(ac_c99_stdio, [
859 AC_TRY_COMPILE([#include <stdio.h>
861 void foo(char* fmt, ...)
863 va_list args; va_start(args, fmt);
864 vfscanf(stderr, "%i", args);
866 vsnprintf(fmt, 0, "%i", args);
867 vsscanf(fmt, "%i", args);
869 [snprintf("12", 0, "%i");],
870 [ac_c99_stdio=yes], [ac_c99_stdio=no])
872 AC_MSG_RESULT($ac_c99_stdio)
874 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
875 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
876 AC_CACHE_VAL(ac_c99_stdlib, [
877 AC_TRY_COMPILE([#include <stdlib.h>],
880 strtold("gnu", &tmp);
885 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
887 AC_MSG_RESULT($ac_c99_stdlib)
889 # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
890 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
892 if test x"$ac_has_wchar_h" = xyes &&
893 test x"$ac_has_wctype_h" = xyes; then
894 AC_TRY_COMPILE([#include <wchar.h>
958 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
960 # Checks for wide character functions that may not be present.
961 # Injection of these is wrapped with guard macros.
962 # NB: only put functions here, instead of immediately above, if
963 # absolutely necessary.
964 AC_TRY_COMPILE([#include <wchar.h>
965 namespace test { using ::vfwscanf; } ], [],
966 [AC_DEFINE(HAVE_VFWSCANF,1,
967 [Defined if vfwscanf exists.])],[])
969 AC_TRY_COMPILE([#include <wchar.h>
970 namespace test { using ::vswscanf; } ], [],
971 [AC_DEFINE(HAVE_VSWSCANF,1,
972 [Defined if vswscanf exists.])],[])
974 AC_TRY_COMPILE([#include <wchar.h>
975 namespace test { using ::vwscanf; } ], [],
976 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
978 AC_TRY_COMPILE([#include <wchar.h>
979 namespace test { using ::wcstof; } ], [],
980 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
982 AC_TRY_COMPILE([#include <wctype.h>],
983 [ wint_t t; int i = iswblank(t);],
984 [AC_DEFINE(HAVE_ISWBLANK,1,
985 [Defined if iswblank exists.])],[])
987 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
988 AC_MSG_RESULT($ac_c99_wchar)
991 # Option parsed, now set things appropriately.
992 if test x"$ac_c99_math" = x"no" ||
993 test x"$ac_c99_complex" = x"no" ||
994 test x"$ac_c99_stdio" = x"no" ||
995 test x"$ac_c99_stdlib" = x"no" ||
996 test x"$ac_c99_wchar" = x"no"; then
999 AC_DEFINE(_GLIBCXX_USE_C99)
1005 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1006 AC_MSG_RESULT($enable_c99)
1011 dnl Check for what type of C headers to use.
1013 dnl --enable-cheaders= [does stuff].
1014 dnl --disable-cheaders [does not do anything, really].
1015 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1016 dnl Where DEFAULT is either `c' or `c_std'.
1018 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1019 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1020 [construct "C" headers for g++], [permit c|c_std])
1021 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1023 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1025 AC_SUBST(C_INCLUDE_DIR)
1026 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1027 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1028 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1033 dnl Check for which locale library to use. The choice is mapped to
1034 dnl a subdirectory of config/locale.
1036 dnl Default is generic.
1038 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1039 AC_MSG_CHECKING([for C locale to use])
1040 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1041 [use MODEL for target locale package],
1042 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1044 # If they didn't use this option switch, or if they specified --enable
1045 # with no specific model, we'll have to look for one. If they
1046 # specified --disable (???), do likewise.
1047 if test $enable_clocale = no || test $enable_clocale = yes; then
1051 # Either a known package, or "auto"
1052 enable_clocale_flag=$enable_clocale
1054 # Probe for locale support if no specific model is specified.
1055 # Default to "generic".
1056 if test $enable_clocale_flag = auto; then
1057 case ${target_os} in
1058 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1059 AC_EGREP_CPP([_GLIBCXX_ok], [
1060 #include <features.h>
1061 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1064 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1066 # Test for bugs early in glibc-2.2.x series
1067 if test $enable_clocale_flag = gnu; then
1069 #define _GNU_SOURCE 1
1072 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1073 extern __typeof(newlocale) __newlocale;
1074 extern __typeof(duplocale) __duplocale;
1075 extern __typeof(strcoll_l) __strcoll_l;
1079 const char __one[] = "Äuglein Augmen";
1080 const char __two[] = "Äuglein";
1085 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1086 loc_dup = __duplocale(loc);
1087 i = __strcoll_l(__one, __two, loc);
1088 j = __strcoll_l(__one, __two, loc_dup);
1092 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1093 [enable_clocale_flag=generic])
1096 # ... at some point put __strxfrm_l tests in as well.
1099 enable_clocale_flag=darwin
1102 enable_clocale_flag=generic
1107 # Deal with gettext issues. Default to not using it (=no) until we detect
1108 # support for it later. Let the user turn it off via --e/d, but let that
1109 # default to on for easier handling.
1112 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1116 # Set configure bits for specified locale package
1117 case ${enable_clocale_flag} in
1119 AC_MSG_RESULT(generic)
1121 CLOCALE_H=config/locale/generic/c_locale.h
1122 CLOCALE_CC=config/locale/generic/c_locale.cc
1123 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1124 CCOLLATE_CC=config/locale/generic/collate_members.cc
1125 CCTYPE_CC=config/locale/generic/ctype_members.cc
1126 CMESSAGES_H=config/locale/generic/messages_members.h
1127 CMESSAGES_CC=config/locale/generic/messages_members.cc
1128 CMONEY_CC=config/locale/generic/monetary_members.cc
1129 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1130 CTIME_H=config/locale/generic/time_members.h
1131 CTIME_CC=config/locale/generic/time_members.cc
1132 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1135 AC_MSG_RESULT(darwin or freebsd)
1137 CLOCALE_H=config/locale/generic/c_locale.h
1138 CLOCALE_CC=config/locale/generic/c_locale.cc
1139 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1140 CCOLLATE_CC=config/locale/generic/collate_members.cc
1141 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1142 CMESSAGES_H=config/locale/generic/messages_members.h
1143 CMESSAGES_CC=config/locale/generic/messages_members.cc
1144 CMONEY_CC=config/locale/generic/monetary_members.cc
1145 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1146 CTIME_H=config/locale/generic/time_members.h
1147 CTIME_CC=config/locale/generic/time_members.cc
1148 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1154 # Declare intention to use gettext, and add support for specific
1156 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1159 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1160 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1161 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1164 # Export the build objects.
1165 for ling in $ALL_LINGUAS; do \
1166 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1167 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1169 AC_SUBST(glibcxx_MOFILES)
1170 AC_SUBST(glibcxx_POFILES)
1172 CLOCALE_H=config/locale/gnu/c_locale.h
1173 CLOCALE_CC=config/locale/gnu/c_locale.cc
1174 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1175 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1176 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1177 CMESSAGES_H=config/locale/gnu/messages_members.h
1178 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1179 CMONEY_CC=config/locale/gnu/monetary_members.cc
1180 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1181 CTIME_H=config/locale/gnu/time_members.h
1182 CTIME_CC=config/locale/gnu/time_members.cc
1183 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1186 AC_MSG_RESULT(IEEE 1003.1)
1188 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1189 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1190 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1191 CCOLLATE_CC=config/locale/generic/collate_members.cc
1192 CCTYPE_CC=config/locale/generic/ctype_members.cc
1193 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1194 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1195 CMONEY_CC=config/locale/generic/monetary_members.cc
1196 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1197 CTIME_H=config/locale/generic/time_members.h
1198 CTIME_CC=config/locale/generic/time_members.cc
1199 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1203 # This is where the testsuite looks for locale catalogs, using the
1204 # -DLOCALEDIR define during testsuite compilation.
1205 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1206 AC_SUBST(glibcxx_localedir)
1208 # A standalone libintl (e.g., GNU libintl) may be in use.
1209 if test $USE_NLS = yes; then
1210 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1211 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1213 if test $USE_NLS = yes; then
1214 AC_DEFINE(_GLIBCXX_USE_NLS)
1219 AC_SUBST(CMESSAGES_H)
1220 AC_SUBST(CCODECVT_CC)
1221 AC_SUBST(CCOLLATE_CC)
1223 AC_SUBST(CMESSAGES_CC)
1225 AC_SUBST(CNUMERIC_CC)
1228 AC_SUBST(CLOCALE_CC)
1229 AC_SUBST(CLOCALE_INTERNAL_H)
1234 dnl Check for which std::allocator base class to use. The choice is
1235 dnl mapped from a subdirectory of include/ext.
1239 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1240 AC_MSG_CHECKING([for std::allocator base class])
1241 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1242 [use KIND for target std::allocator base],
1243 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1245 # If they didn't use this option switch, or if they specified --enable
1246 # with no specific model, we'll have to look for one. If they
1247 # specified --disable (???), do likewise.
1248 if test $enable_libstdcxx_allocator = no ||
1249 test $enable_libstdcxx_allocator = yes;
1251 enable_libstdcxx_allocator=auto
1254 # Either a known package, or "auto". Auto implies the default choice
1255 # for a particular platform.
1256 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1258 # Probe for host-specific support if no specific model is specified.
1260 if test $enable_libstdcxx_allocator_flag = auto; then
1261 case ${target_os} in
1262 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1263 enable_libstdcxx_allocator_flag=mt
1266 enable_libstdcxx_allocator_flag=new
1270 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1273 # Set configure bits for specified locale package
1274 case ${enable_libstdcxx_allocator_flag} in
1276 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1277 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1280 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1281 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1284 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1285 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1288 ALLOCATOR_H=config/allocator/new_allocator_base.h
1289 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1292 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1293 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1297 AC_SUBST(ALLOCATOR_H)
1298 AC_SUBST(ALLOCATOR_NAME)
1303 dnl Check for whether the Boost-derived checks should be turned on.
1305 dnl --enable-concept-checks turns them on.
1306 dnl --disable-concept-checks leaves them off.
1307 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1308 dnl Where DEFAULT is either `yes' or `no'.
1310 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1311 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1312 if test $enable_concept_checks = yes; then
1313 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1319 dnl Check for which I/O library to use: stdio, or something specific.
1321 dnl Default is stdio.
1323 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1324 AC_MSG_CHECKING([for underlying I/O to use])
1325 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1326 [use target-specific I/O package], [permit stdio])
1328 # Now that libio has been removed, you can have any color you want as long
1329 # as it's black. This is one big no-op until other packages are added, but
1330 # showing the framework never hurts.
1331 case ${enable_cstdio} in
1333 CSTDIO_H=config/io/c_io_stdio.h
1334 BASIC_FILE_H=config/io/basic_file_stdio.h
1335 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1336 AC_MSG_RESULT(stdio)
1341 AC_SUBST(BASIC_FILE_H)
1342 AC_SUBST(BASIC_FILE_CC)
1347 dnl Check for "unusual" flags to pass to the compiler while building.
1349 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1350 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1351 dnl --disable-cxx-flags passes nothing.
1352 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1353 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1354 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1355 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1356 dnl If "default flags" is an empty string, the effect is the same
1357 dnl as --disable or --enable=no.
1359 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1360 AC_MSG_CHECKING([for extra compiler flags for building])
1361 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1362 [pass compiler FLAGS when building library],
1363 [case "x$enable_cxx_flags" in
1364 xno | x) enable_cxx_flags= ;;
1366 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1369 # Run through flags (either default or command-line) and set anything
1370 # extra (e.g., #defines) that must accompany particular g++ options.
1371 if test -n "$enable_cxx_flags"; then
1372 for f in $enable_cxx_flags; do
1376 *) # and we're trying to pass /what/ exactly?
1377 AC_MSG_ERROR([compiler flags start with a -]) ;;
1382 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1383 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1384 AC_SUBST(EXTRA_CXX_FLAGS)
1389 dnl Check to see if debugging libraries are to be built.
1391 dnl --enable-libstdcxx-debug
1392 dnl builds a separate set of debugging libraries in addition to the
1393 dnl normal (shared, static) libstdc++ binaries.
1395 dnl --disable-libstdcxx-debug
1396 dnl builds only one (non-debug) version of libstdc++.
1398 dnl --enable-libstdcxx-debug-flags=FLAGS
1399 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1401 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1402 dnl Where DEFAULT is either `yes' or `no'.
1404 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1405 AC_MSG_CHECKING([for additional debug build])
1406 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1407 AC_MSG_RESULT($enable_libstdcxx_debug)
1408 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1413 dnl Check for explicit debug flags.
1415 dnl --enable-libstdcxx-debug-flags='-O1'
1416 dnl is a general method for passing flags to be used when
1417 dnl building debug libraries with --enable-debug.
1419 dnl --disable-libstdcxx-debug-flags does nothing.
1420 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1421 dnl If "default flags" is an empty string, the effect is the same
1422 dnl as --disable or --enable=no.
1424 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1425 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1426 [pass compiler FLAGS when building debug library],
1427 [case "x$enable_libstdcxx_debug_flags" in
1428 xno | x) enable_libstdcxx_debug_flags= ;;
1430 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1433 # Option parsed, now set things appropriately
1434 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1435 AC_SUBST(DEBUG_FLAGS)
1437 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1442 dnl Check if the user only wants a freestanding library implementation.
1444 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1445 dnl installing only the headers required by [17.4.1.3] and the language
1446 dnl support library. More than that will be built (to keep the Makefiles
1447 dnl conveniently clean), but not installed.
1450 dnl is_hosted (yes/no)
1453 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1455 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1456 AC_ARG_ENABLE([hosted-libstdcxx],
1457 AC_HELP_STRING([--disable-hosted-libstdcxx],
1458 [only build freestanding C++ runtime support]),,
1461 enable_hosted_libstdcxx=no
1464 enable_hosted_libstdcxx=yes
1467 if test "$enable_hosted_libstdcxx" = no; then
1468 AC_MSG_NOTICE([Only freestanding libraries will be built])
1472 enable_libstdcxx_pch=no
1477 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1478 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1479 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1484 dnl Check for template specializations for the 'long long' type.
1485 dnl The result determines only whether 'long long' I/O is enabled; things
1486 dnl like numeric_limits<> specializations are always available.
1488 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1489 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1490 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1491 dnl Where DEFAULT is either `yes' or `no'.
1493 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1494 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1495 if test $enable_long_long = yes; then
1496 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1498 AC_MSG_CHECKING([for enabled long long specializations])
1499 AC_MSG_RESULT([$enable_long_long])
1504 dnl Check for template specializations for the 'wchar_t' type.
1506 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1507 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1508 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1509 dnl Where DEFAULT is either `yes' or `no'.
1511 dnl Necessary support (probed along with C99 support) must also be present.
1513 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1514 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1515 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1516 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
1518 AC_MSG_CHECKING([for enabled wchar_t specializations])
1519 AC_MSG_RESULT([$enable_wchar_t])
1524 dnl Check to see if building and using a C++ precompiled header can be done.
1526 dnl --enable-libstdcxx-pch=yes
1527 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1528 dnl may work, after some light-hearted attempts to puzzle out compiler
1529 dnl support, flip bits on in include/Makefile.am
1531 dnl --disable-libstdcxx-pch
1532 dnl turns off attempts to use or build stdc++.h.gch.
1535 dnl glibcxx_PCHFLAGS
1537 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1538 AC_MSG_CHECKING([for enabled PCH])
1539 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1540 AC_MSG_RESULT([$enable_libstdcxx_pch])
1542 if test $enable_libstdcxx_pch = yes; then
1543 AC_CACHE_CHECK([for compiler with PCH support],
1544 [glibcxx_cv_prog_CXX_pch],
1545 [ac_save_CXXFLAGS="$CXXFLAGS"
1546 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1549 echo '#include <math.h>' > conftest.h
1550 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1551 -o conftest.h.gch 1>&5 2>&1 &&
1552 echo '#error "pch failed"' > conftest.h &&
1553 echo '#include "conftest.h"' > conftest.cc &&
1554 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1556 glibcxx_cv_prog_CXX_pch=yes
1558 glibcxx_cv_prog_CXX_pch=no
1561 CXXFLAGS=$ac_save_CXXFLAGS
1564 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1567 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1568 if test $enable_libstdcxx_pch = yes; then
1569 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1573 AC_SUBST(glibcxx_PCHFLAGS)
1578 dnl Check for exception handling support. If an explicit enable/disable
1579 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1580 dnl target may or may not support call frame exceptions.
1582 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1583 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1584 dnl Neither one forces an attempt at detection.
1587 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1589 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1590 AC_MSG_CHECKING([for exception model to use])
1593 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1594 [force use of builtin_setjmp for exceptions],
1595 [permit yes|no|auto])
1597 if test $enable_sjlj_exceptions = auto; then
1598 # Botheration. Now we've got to detect the exception model. Link tests
1599 # against libgcc.a are problematic since we've not been given proper -L
1600 # bits for single-tree newlib and libgloss.
1602 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1603 cat > conftest.$ac_ext << EOF
1604 [#]line __oline__ "configure"
1613 old_CXXFLAGS="$CXXFLAGS"
1615 if AC_TRY_EVAL(ac_compile); then
1616 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1617 enable_sjlj_exceptions=yes
1618 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1619 enable_sjlj_exceptions=no
1622 CXXFLAGS="$old_CXXFLAGS"
1626 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1627 # to two different models.
1628 case $enable_sjlj_exceptions in
1630 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1631 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1632 ac_exception_model_name=sjlj
1635 ac_exception_model_name="call frame"
1638 AC_MSG_ERROR([unable to detect exception model])
1642 AC_MSG_RESULT($ac_exception_model_name)
1647 dnl Add version tags to symbols in shared library (or not), additionally
1648 dnl marking other symbols as private/local (or not).
1650 dnl --enable-symvers=style adds a version script to the linker call when
1651 dnl creating the shared library. The choice of version script is
1652 dnl controlled by 'style'.
1653 dnl --disable-symvers does not.
1654 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1655 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1656 dnl choose a default style based on linker characteristics. Passing
1657 dnl 'no' disables versioning.
1659 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1661 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1662 [enables symbol versioning of the shared library],
1663 [permit yes|no|gnu])
1665 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1666 # don't know enough about $LD to do tricks...
1667 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1668 # FIXME The following test is too strict, in theory.
1669 if test $enable_shared = no ||
1671 test x$glibcxx_gnu_ld_version = x; then
1675 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1676 if test $enable_symvers != no; then
1677 AC_MSG_CHECKING([for shared libgcc])
1678 ac_save_CFLAGS="$CFLAGS"
1680 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1681 CFLAGS="$ac_save_CFLAGS"
1682 if test $glibcxx_shared_libgcc = no; then
1683 cat > conftest.c <<EOF
1684 int main (void) { return 0; }
1687 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1688 -shared -shared-libgcc -o conftest.so \
1689 conftest.c -v 2>&1 >/dev/null \
1690 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1692 rm -f conftest.c conftest.so
1693 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1694 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1695 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1696 CFLAGS="$ac_save_CFLAGS"
1699 AC_MSG_RESULT($glibcxx_shared_libgcc)
1702 # For GNU ld, we need at least this version. The format is described in
1703 # GLIBCXX_CHECK_LINKER_FEATURES above.
1704 glibcxx_min_gnu_ld_version=21400
1705 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1707 # Check to see if unspecified "yes" value can win, given results above.
1708 # Change "yes" into either "no" or a style name.
1709 if test $enable_symvers = yes; then
1710 if test $with_gnu_ld = yes &&
1711 test $glibcxx_shared_libgcc = yes;
1713 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1716 # The right tools, the right setup, but too old. Fallbacks?
1717 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1718 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1719 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1720 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1721 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1722 # Globbing fix is present, proper block support is not.
1723 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1724 dnl enable_symvers=???
1725 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1729 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1735 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1736 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1737 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1738 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1743 # Everything parsed; figure out what file to use.
1744 case $enable_symvers in
1746 SYMVER_MAP=config/linker-map.dummy
1749 SYMVER_MAP=config/linker-map.gnu
1750 AC_DEFINE(_GLIBCXX_SYMVER)
1754 AC_SUBST(SYMVER_MAP)
1755 AC_SUBST(port_specific_symbol_files)
1756 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1757 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1762 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1763 dnl We must stage the required headers so that they will be installed
1764 dnl with the library (unlike libgcc, the STL implementation is provided
1765 dnl solely within headers). Since we must not inject random user-space
1766 dnl macro names into user-provided C++ code, we first stage into <file>-in
1767 dnl and process to <file> with an output command. The reason for a two-
1768 dnl stage process here is to correctly handle $srcdir!=$objdir without
1769 dnl having to write complex code (the sed commands to clean the macro
1770 dnl namespace are complex and fragile enough as it is). We must also
1771 dnl add a relative path so that -I- is supported properly.
1774 dnl glibcxx_thread_h
1777 dnl HAVE_GTHR_DEFAULT
1779 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1780 AC_MSG_CHECKING([for thread model used by GCC])
1781 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1782 AC_MSG_RESULT([$target_thread_file])
1784 if test $target_thread_file != single; then
1785 AC_DEFINE(HAVE_GTHR_DEFAULT)
1788 glibcxx_thread_h=gthr-$target_thread_file.h
1790 dnl Check for __GTHREADS define.
1791 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1792 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1798 AC_SUBST(glibcxx_thread_h)
1802 # Check whether LC_MESSAGES is available in <locale.h>.
1803 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1805 # This file file be copied and used freely without restrictions. It can
1806 # be used in projects which are not available under the GNU Public License
1807 # but which still want to provide support for the GNU gettext functionality.
1808 # Please note that the actual code is *not* freely available.
1811 AC_DEFUN([AC_LC_MESSAGES], [
1812 AC_CHECK_HEADER(locale.h, [
1813 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1814 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1815 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1816 if test $ac_cv_val_LC_MESSAGES = yes; then
1817 AC_DEFINE(HAVE_LC_MESSAGES)
1823 sinclude([../libtool.m4])
1824 dnl The lines below arrange for aclocal not to bring an installed
1825 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1826 dnl add a definition of LIBTOOL to Makefile.in.
1827 ifelse(,,,[AC_SUBST(LIBTOOL)
1828 AC_DEFUN([AM_PROG_LIBTOOL])
1829 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1830 AC_DEFUN([AC_PROG_LD])
1833 dnl vim:et:ts=2:sw=2