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.
135 dnl Tests for newer compiler features, or features that are present in newer
136 dnl compiler versions but not older compiler versions still in use, should
140 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
141 dnl new inlining code or the new system_header pragma will die on -Werror.
142 dnl Leave it out by default and use maint-mode to use it.
143 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
144 dnl compiler supports it and the user has not requested debug mode.
146 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
147 # All these tests are for C++; save the language and the compiler flags.
148 # The CXXFLAGS thing is suspicious, but based on similar bits previously
149 # found in GLIBCXX_CONFIGURE.
152 ac_test_CXXFLAGS="${CXXFLAGS+set}"
153 ac_save_CXXFLAGS="$CXXFLAGS"
155 # Check for maintainer-mode bits.
156 if test x"$USE_MAINTAINER_MODE" = xno; then
162 # Check for -ffunction-sections -fdata-sections
163 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
164 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
165 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
166 if test "$ac_test_CXXFLAGS" = set; then
167 CXXFLAGS="$ac_save_CXXFLAGS"
169 # this is the suspicious part
172 if test x"$ac_fdsections" = x"yes"; then
173 SECTION_FLAGS='-ffunction-sections -fdata-sections'
175 AC_MSG_RESULT($ac_fdsections)
179 AC_SUBST(SECTION_FLAGS)
184 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
185 dnl the native linker is in use, all variables will be defined to something
186 dnl safe (like an empty string).
189 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
190 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
191 dnl LD (as a side effect of testing)
194 dnl glibcxx_gnu_ld_version (possibly)
196 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
197 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
199 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
200 # If we're not using GNU ld, then there's no point in even trying these
201 # tests. Check for that first. We should have already tested for gld
202 # by now (in libtool), but require it now just to be safe...
203 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
204 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
205 AC_REQUIRE([AC_PROG_LD])
206 AC_REQUIRE([AC_PROG_AWK])
208 # The name set by libtool depends on the version of libtool. Shame on us
209 # for depending on an impl detail, but c'est la vie. Older versions used
210 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
211 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
212 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
213 # set (hence we're using an older libtool), then set it.
214 if test x${with_gnu_ld+set} != xset; then
215 if test x${ac_cv_prog_gnu_ld+set} != xset; then
216 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
219 with_gnu_ld=$ac_cv_prog_gnu_ld
223 # Start by getting the version number. I think the libtool test already
224 # does some of this, but throws away the result.
226 ldver=`$LD --version 2>/dev/null | head -1 | \
227 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
229 glibcxx_gnu_ld_version=`echo $ldver | \
230 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
233 if test "$with_gnu_ld" = "notbroken"; then
234 # GNU ld it is! Joy and bunny rabbits!
236 # All these tests are for C++; save the language and the compiler flags.
237 # Need to do this so that g++ won't try to link in libstdc++
238 ac_test_CFLAGS="${CFLAGS+set}"
239 ac_save_CFLAGS="$CFLAGS"
240 CFLAGS='-x c++ -Wl,--gc-sections'
242 # Check for -Wl,--gc-sections
243 # XXX This test is broken at the moment, as symbols required for linking
244 # are now in libsupc++ (not built yet). In addition, this test has
245 # cored on solaris in the past. In addition, --gc-sections doesn't
246 # really work at the moment (keeps on discarding used sections, first
247 # .eh_frame and now some of the glibc sections for iconv).
248 # Bzzzzt. Thanks for playing, maybe next time.
249 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
257 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
258 if test "$ac_test_CFLAGS" = set; then
259 CFLAGS="$ac_save_CFLAGS"
261 # this is the suspicious part
264 if test "$ac_sectionLDflags" = "yes"; then
265 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
267 AC_MSG_RESULT($ac_sectionLDflags)
271 # Note this is only for shared objects
273 if test x"$with_gnu_ld" = x"yes"; then
274 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
275 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
276 if test -n "$cxx_z_relo"; then
277 OPT_LDFLAGS="-Wl,-z,relro"
280 AC_MSG_RESULT($ac_ld_relro)
283 # Set linker optimization flags.
284 if test x"$with_gnu_ld" = x"yes"; then
285 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
288 AC_SUBST(SECTION_LDFLAGS)
289 AC_SUBST(OPT_LDFLAGS)
294 dnl Check to see if this target can enable the iconv specializations.
295 dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
296 dnl (This must have been previously checked, along with the rest of C99
297 dnl support.) By default, iconv support is disabled.
300 dnl _GLIBCXX_USE_ICONV if all the bits are found.
302 dnl LIBICONV to a -l string containing the iconv library, if needed.
304 AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
307 # Only continue checking if the ISO C99 headers exist and support is on.
308 if test x"$enable_wchar_t" = xyes; then
310 # Use iconv for wchar_t to char conversions. As such, check for
311 # X/Open Portability Guide, version 2 features (XPG2).
312 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
313 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
315 # Check for existence of libiconv.a providing XPG2 wchar_t support.
316 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
318 LIBS="$LIBS $LIBICONV"
321 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
322 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
326 if test x"$ac_has_iconv_h" = xyes &&
327 test x"$ac_has_langinfo_h" = xyes &&
328 test x"$ac_XPG2funcs" = xyes;
330 AC_DEFINE([_GLIBCXX_USE_ICONV],1,
331 [Define if iconv and related functions exist and are usable.])
335 AC_MSG_CHECKING([for enabled iconv specializations])
336 AC_MSG_RESULT($enable_iconv)
341 dnl Check for headers for, and arguments to, the setrlimit() function.
342 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
345 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
346 dnl various HAVE_LIMIT_* for individual limit names
348 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
349 AC_MSG_CHECKING([for RLIMIT_$1])
352 #include <sys/time.h>
353 #include <sys/resource.h>
355 [ int f = RLIMIT_$1 ; ],
356 [glibcxx_mresult=1], [glibcxx_mresult=0])
357 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
358 [Only used in build directory testsuite_hooks.h.])
359 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
363 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
364 setrlimit_have_headers=yes
365 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
367 [setrlimit_have_headers=no])
368 # If don't have the headers, then we can't run the tests now, and we
369 # won't be seeing any of these during testsuite compilation.
370 if test $setrlimit_have_headers = yes; then
371 # Can't do these in a loop, else the resulting syntax is wrong.
372 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
373 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
374 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
375 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
376 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
378 # Check for rlimit, setrlimit.
379 AC_CACHE_VAL(ac_setrlimit, [
382 #include <sys/time.h>
383 #include <sys/resource.h>
387 [ac_setrlimit=yes], [ac_setrlimit=no])
391 AC_MSG_CHECKING([for testsuite resource limits support])
392 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
394 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
395 [Define if using setrlimit to set resource limits during
400 AC_MSG_RESULT($ac_res_limits)
405 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
406 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
408 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
409 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
410 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
412 [#include <sys/stat.h>],
415 S_ISREG(buffer.st_mode);],
416 [glibcxx_cv_S_ISREG=yes],
417 [glibcxx_cv_S_ISREG=no])
419 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
421 [#include <sys/stat.h>],
424 S_IFREG & buffer.st_mode;],
425 [glibcxx_cv_S_IFREG=yes],
426 [glibcxx_cv_S_IFREG=no])
429 if test $glibcxx_cv_S_ISREG = yes; then
430 AC_DEFINE(HAVE_S_ISREG, 1,
431 [Define if S_IFREG is available in <sys/stat.h>.])
433 elif test $glibcxx_cv_S_IFREG = yes; then
434 AC_DEFINE(HAVE_S_IFREG, 1,
435 [Define if S_IFREG is available in <sys/stat.h>.])
443 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
445 AC_DEFUN([GLIBCXX_CHECK_POLL], [
446 AC_MSG_CHECKING([for poll])
447 AC_CACHE_VAL(glibcxx_cv_POLL, [
450 [struct pollfd pfd[1];
451 pfd[0].events = POLLIN;
453 [glibcxx_cv_POLL=yes],
454 [glibcxx_cv_POLL=no])
456 if test $glibcxx_cv_POLL = yes; then
457 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
459 AC_MSG_RESULT($glibcxx_cv_POLL)
464 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
466 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
467 AC_MSG_CHECKING([for writev])
468 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
470 [#include <sys/uio.h>],
471 [struct iovec iov[2];
473 [glibcxx_cv_WRITEV=yes],
474 [glibcxx_cv_WRITEV=no])
476 if test $glibcxx_cv_WRITEV = yes; then
477 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
479 AC_MSG_RESULT($glibcxx_cv_WRITEV)
484 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
486 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
487 AC_MSG_CHECKING([for int64_t])
488 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
490 [#include <stdint.h>],
492 [glibcxx_cv_INT64_T=yes],
493 [glibcxx_cv_INT64_T=no])
495 if test $glibcxx_cv_INT64_T = yes; then
496 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
498 AC_MSG_RESULT($glibcxx_cv_INT64_T)
503 dnl Check whether LFS support is available.
505 AC_DEFUN([GLIBCXX_CHECK_LFS], [
508 ac_save_CXXFLAGS="$CXXFLAGS"
509 CXXFLAGS="$CXXFLAGS -fno-exceptions"
510 AC_MSG_CHECKING([for LFS support])
511 AC_CACHE_VAL(glibcxx_cv_LFS, [
515 #include <sys/stat.h>
519 fseeko64(fp, 0, SEEK_CUR);
521 lseek64(1, 0, SEEK_CUR);
524 [glibcxx_cv_LFS=yes],
527 if test $glibcxx_cv_LFS = yes; then
528 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
530 AC_MSG_RESULT($glibcxx_cv_LFS)
531 CXXFLAGS="$ac_save_CXXFLAGS"
537 dnl Check for whether a fully dynamic basic_string implementation should
538 dnl be turned on, that does not put empty objects in per-process static
539 dnl memory (mostly useful together with shared memory allocators, see PR
540 dnl libstdc++/16612 for details).
542 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
543 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
544 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
545 dnl Where DEFAULT is either `yes' or `no'.
547 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
548 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
549 if test $enable_fully_dynamic_string = yes; then
550 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
551 [Define if a fully dynamic basic_string is wanted.])
557 dnl Does any necessary configuration of the testsuite directory. Generates
558 dnl the testsuite_hooks.h header.
560 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
564 dnl GLIBCXX_TEST_WCHAR_T
565 dnl GLIBCXX_TEST_THREAD
569 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
570 if $GLIBCXX_IS_NATIVE ; then
571 # Do checks for resource limit functions.
572 GLIBCXX_CHECK_SETRLIMIT
574 # Look for setenv, so that extended locale tests can be performed.
575 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
578 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
579 test $enable_symvers != no; then
582 enable_abi_check=no ;;
584 enable_abi_check=yes ;;
587 # Only build this as native, since automake does not understand
592 # Export file names for ABI checking.
593 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
594 AC_SUBST(baseline_dir)
599 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
603 dnl TOPLEVEL_INCLUDES
605 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
606 # Used for every C++ compile we perform.
608 -I$glibcxx_builddir/include/$host_alias \
609 -I$glibcxx_builddir/include \
610 -I$glibcxx_srcdir/libsupc++"
612 # For Canadian crosses, pick this up too.
613 if test $CANADIAN = yes; then
614 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
617 # Stuff in the actual top level. Currently only used by libsupc++ to
618 # get unwind* headers from the gcc dir.
619 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
620 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
622 # Now, export this to all the little Makefiles....
623 AC_SUBST(GLIBCXX_INCLUDES)
624 AC_SUBST(TOPLEVEL_INCLUDES)
629 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
630 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
633 dnl OPTIMIZE_CXXFLAGS
636 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
637 # Optimization flags that are probably a good idea for thrill-seekers. Just
638 # uncomment the lines below and make, everything else is ready to go...
639 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
641 AC_SUBST(OPTIMIZE_CXXFLAGS)
643 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
649 dnl All installation directory information is determined here.
653 dnl glibcxx_prefixdir
654 dnl glibcxx_toolexecdir
655 dnl glibcxx_toolexeclibdir
657 dnl Assumes cross_compiling bits already done, and with_cross_host in
660 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
661 glibcxx_toolexecdir=no
662 glibcxx_toolexeclibdir=no
663 glibcxx_prefixdir=$prefix
665 AC_MSG_CHECKING([for gxx-include-dir])
666 AC_ARG_WITH([gxx-include-dir],
667 AC_HELP_STRING([--with-gxx-include-dir=DIR],
668 [installation directory for include files]),
670 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
671 no) gxx_include_dir=no ;;
672 *) gxx_include_dir=$withval ;;
674 [gxx_include_dir=no])
675 AC_MSG_RESULT($gxx_include_dir)
677 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
678 AC_ARG_ENABLE([version-specific-runtime-libs],
679 AC_HELP_STRING([--enable-version-specific-runtime-libs],
680 [Specify that runtime libraries should be installed in a compiler-specific directory]),
681 [case "$enableval" in
682 yes) version_specific_libs=yes ;;
683 no) version_specific_libs=no ;;
684 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
686 [version_specific_libs=no])
687 AC_MSG_RESULT($version_specific_libs)
689 # Default case for install directory for include files.
690 if test $version_specific_libs = no && test $gxx_include_dir = no; then
691 gxx_include_dir='${prefix}/include/c++/${gcc_version}'
694 # Version-specific runtime libs processing.
695 if test $version_specific_libs = yes; then
696 # Need the gcc compiler version to know where to install libraries
697 # and header files if --enable-version-specific-runtime-libs option
698 # is selected. FIXME: these variables are misnamed, there are
699 # no executables installed in _toolexecdir or _toolexeclibdir.
700 if test x"$gxx_include_dir" = x"no"; then
701 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
703 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
704 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
707 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
708 # Install a library built with a cross compiler in tooldir, not libdir.
709 if test x"$glibcxx_toolexecdir" = x"no"; then
710 if test -n "$with_cross_host" &&
711 test x"$with_cross_host" != x"no"; then
712 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
713 glibcxx_toolexeclibdir='${toolexecdir}/lib'
715 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
716 glibcxx_toolexeclibdir='${libdir}'
718 multi_os_directory=`$CXX -print-multi-os-directory`
719 case $multi_os_directory in
720 .) ;; # Avoid trailing /.
721 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
725 AC_MSG_CHECKING([for install location])
726 AC_MSG_RESULT($gxx_include_dir)
728 AC_SUBST(glibcxx_prefixdir)
729 AC_SUBST(gxx_include_dir)
730 AC_SUBST(glibcxx_toolexecdir)
731 AC_SUBST(glibcxx_toolexeclibdir)
737 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
738 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
739 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
741 dnl See docs/html/17_intro/configury.html#enable for documentation.
743 m4_define([GLIBCXX_ENABLE],[dnl
744 m4_define([_g_switch],[--enable-$1])dnl
745 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
746 AC_ARG_ENABLE($1,_g_help,
751 m4_bpatsubst([$5],[permit ])) ;;
752 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
753 dnl Idea for future: generate a URL pointing to
754 dnl "onlinedocs/configopts.html#whatever"
761 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
765 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
766 m4_undefine([_g_switch])dnl
767 m4_undefine([_g_help])dnl
772 dnl Check for ISO/IEC 9899:1999 "C99" support.
774 dnl --enable-c99 defines _GLIBCXX_USE_C99
775 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
776 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
777 dnl Where DEFAULT is either `yes' or `no'.
778 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
780 AC_DEFUN([GLIBCXX_ENABLE_C99], [
781 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
783 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos
784 # even if C99 support is turned off.
785 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
786 AC_MSG_CHECKING([for mbstate_t])
787 AC_TRY_COMPILE([#include <wchar.h>],
788 [mbstate_t teststate;],
789 have_mbstate_t=yes, have_mbstate_t=no)
790 AC_MSG_RESULT($have_mbstate_t)
791 if test x"$have_mbstate_t" = xyes; then
792 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
795 if test x"$enable_c99" = x"yes"; then
800 # Check for the existence of <math.h> functions used if C99 is enabled.
801 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
802 AC_CACHE_VAL(ac_c99_math, [
803 AC_TRY_COMPILE([#include <math.h>],
811 isgreaterequal(0.0,0.0);
813 islessequal(0.0,0.0);
814 islessgreater(0.0,0.0);
815 islessgreater(0.0,0.0);
816 isunordered(0.0,0.0);
817 ],[ac_c99_math=yes], [ac_c99_math=no])
819 AC_MSG_RESULT($ac_c99_math)
820 if test x"$ac_c99_math" = x"yes"; then
821 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
822 [Define if C99 functions or macros in <math.h> should be imported
823 in <cmath> in namespace std.])
826 # Check for the existence of <complex.h> complex math functions.
827 # This is necessary even though libstdc++ uses the builtin versions
828 # of these functions, because if the builtin cannot be used, a reference
829 # to the library function is emitted.
830 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
832 if test x"$ac_has_complex_h" = x"yes"; then
833 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
834 AC_TRY_COMPILE([#include <complex.h>],
835 [typedef __complex__ float float_type; float_type tmpf;
848 typedef __complex__ double double_type; double_type tmpd;
861 typedef __complex__ long double ld_type; ld_type tmpld;
874 ],[ac_c99_complex=yes], [ac_c99_complex=no])
876 AC_MSG_RESULT($ac_c99_complex)
877 if test x"$ac_c99_complex" = x"yes"; then
878 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
879 [Define if C99 functions in <complex.h> should be used in
880 <complex>. Using compiler builtins for these functions requires
881 corresponding C99 library functions to be present.])
884 # Check for the existence in <stdio.h> of vscanf, et. al.
885 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
886 AC_CACHE_VAL(ac_c99_stdio, [
887 AC_TRY_COMPILE([#include <stdio.h>
889 void foo(char* fmt, ...)
891 va_list args; va_start(args, fmt);
892 vfscanf(stderr, "%i", args);
894 vsnprintf(fmt, 0, "%i", args);
895 vsscanf(fmt, "%i", args);
897 [snprintf("12", 0, "%i");],
898 [ac_c99_stdio=yes], [ac_c99_stdio=no])
900 AC_MSG_RESULT($ac_c99_stdio)
902 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
903 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
904 AC_CACHE_VAL(ac_c99_stdlib, [
905 AC_TRY_COMPILE([#include <stdlib.h>],
908 strtold("gnu", &tmp);
909 strtoll("gnu", &tmp, 10);
910 strtoull("gnu", &tmp, 10);
915 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
917 AC_MSG_RESULT($ac_c99_stdlib)
919 # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
920 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
922 if test x"$ac_has_wchar_h" = xyes &&
923 test x"$ac_has_wctype_h" = xyes; then
924 AC_TRY_COMPILE([#include <wchar.h>
988 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
990 # Checks for wide character functions that may not be present.
991 # Injection of these is wrapped with guard macros.
992 # NB: only put functions here, instead of immediately above, if
993 # absolutely necessary.
994 AC_TRY_COMPILE([#include <wchar.h>
995 namespace test { using ::vfwscanf; } ], [],
996 [AC_DEFINE(HAVE_VFWSCANF,1,
997 [Defined if vfwscanf exists.])],[])
999 AC_TRY_COMPILE([#include <wchar.h>
1000 namespace test { using ::vswscanf; } ], [],
1001 [AC_DEFINE(HAVE_VSWSCANF,1,
1002 [Defined if vswscanf exists.])],[])
1004 AC_TRY_COMPILE([#include <wchar.h>
1005 namespace test { using ::vwscanf; } ], [],
1006 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1008 AC_TRY_COMPILE([#include <wchar.h>
1009 namespace test { using ::wcstof; } ], [],
1010 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1012 AC_TRY_COMPILE([#include <wctype.h>],
1013 [ wint_t t; int i = iswblank(t);],
1014 [AC_DEFINE(HAVE_ISWBLANK,1,
1015 [Defined if iswblank exists.])],[])
1017 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1018 AC_MSG_RESULT($ac_c99_wchar)
1021 # Option parsed, now set things appropriately.
1022 if test x"$ac_c99_math" = x"no" ||
1023 test x"$ac_c99_complex" = x"no" ||
1024 test x"$ac_c99_stdio" = x"no" ||
1025 test x"$ac_c99_stdlib" = x"no" ||
1026 test x"$ac_c99_wchar" = x"no"; then
1029 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1030 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1031 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1037 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1038 AC_MSG_RESULT($enable_c99)
1043 dnl Check for what type of C headers to use.
1045 dnl --enable-cheaders= [does stuff].
1046 dnl --disable-cheaders [does not do anything, really].
1047 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1048 dnl Where DEFAULT is either `c' or `c_std'.
1050 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1051 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1052 [construct "C" headers for g++], [permit c|c_std])
1053 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1055 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1057 AC_SUBST(C_INCLUDE_DIR)
1058 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1059 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1060 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1065 dnl Check for which locale library to use. The choice is mapped to
1066 dnl a subdirectory of config/locale.
1068 dnl Default is generic.
1070 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1071 AC_MSG_CHECKING([for C locale to use])
1072 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1073 [use MODEL for target locale package],
1074 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1076 # If they didn't use this option switch, or if they specified --enable
1077 # with no specific model, we'll have to look for one. If they
1078 # specified --disable (???), do likewise.
1079 if test $enable_clocale = no || test $enable_clocale = yes; then
1083 # Either a known package, or "auto"
1084 enable_clocale_flag=$enable_clocale
1086 # Probe for locale support if no specific model is specified.
1087 # Default to "generic".
1088 if test $enable_clocale_flag = auto; then
1089 case ${target_os} in
1090 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1091 AC_EGREP_CPP([_GLIBCXX_ok], [
1092 #include <features.h>
1093 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1096 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1098 # Test for bugs early in glibc-2.2.x series
1099 if test $enable_clocale_flag = gnu; then
1101 #define _GNU_SOURCE 1
1104 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1105 extern __typeof(newlocale) __newlocale;
1106 extern __typeof(duplocale) __duplocale;
1107 extern __typeof(strcoll_l) __strcoll_l;
1111 const char __one[] = "Äuglein Augmen";
1112 const char __two[] = "Äuglein";
1117 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1118 loc_dup = __duplocale(loc);
1119 i = __strcoll_l(__one, __two, loc);
1120 j = __strcoll_l(__one, __two, loc_dup);
1124 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1125 [enable_clocale_flag=generic])
1128 # ... at some point put __strxfrm_l tests in as well.
1131 enable_clocale_flag=darwin
1134 enable_clocale_flag=generic
1139 # Deal with gettext issues. Default to not using it (=no) until we detect
1140 # support for it later. Let the user turn it off via --e/d, but let that
1141 # default to on for easier handling.
1144 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1148 # Set configure bits for specified locale package
1149 case ${enable_clocale_flag} in
1151 AC_MSG_RESULT(generic)
1153 CLOCALE_H=config/locale/generic/c_locale.h
1154 CLOCALE_CC=config/locale/generic/c_locale.cc
1155 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1156 CCOLLATE_CC=config/locale/generic/collate_members.cc
1157 CCTYPE_CC=config/locale/generic/ctype_members.cc
1158 CMESSAGES_H=config/locale/generic/messages_members.h
1159 CMESSAGES_CC=config/locale/generic/messages_members.cc
1160 CMONEY_CC=config/locale/generic/monetary_members.cc
1161 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1162 CTIME_H=config/locale/generic/time_members.h
1163 CTIME_CC=config/locale/generic/time_members.cc
1164 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1167 AC_MSG_RESULT(darwin or freebsd)
1169 CLOCALE_H=config/locale/generic/c_locale.h
1170 CLOCALE_CC=config/locale/generic/c_locale.cc
1171 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1172 CCOLLATE_CC=config/locale/generic/collate_members.cc
1173 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1174 CMESSAGES_H=config/locale/generic/messages_members.h
1175 CMESSAGES_CC=config/locale/generic/messages_members.cc
1176 CMONEY_CC=config/locale/generic/monetary_members.cc
1177 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1178 CTIME_H=config/locale/generic/time_members.h
1179 CTIME_CC=config/locale/generic/time_members.cc
1180 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1186 # Declare intention to use gettext, and add support for specific
1188 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1191 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1192 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1193 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1196 # Export the build objects.
1197 for ling in $ALL_LINGUAS; do \
1198 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1199 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1201 AC_SUBST(glibcxx_MOFILES)
1202 AC_SUBST(glibcxx_POFILES)
1204 CLOCALE_H=config/locale/gnu/c_locale.h
1205 CLOCALE_CC=config/locale/gnu/c_locale.cc
1206 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1207 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1208 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1209 CMESSAGES_H=config/locale/gnu/messages_members.h
1210 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1211 CMONEY_CC=config/locale/gnu/monetary_members.cc
1212 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1213 CTIME_H=config/locale/gnu/time_members.h
1214 CTIME_CC=config/locale/gnu/time_members.cc
1215 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1218 AC_MSG_RESULT(IEEE 1003.1)
1220 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1221 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1222 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1223 CCOLLATE_CC=config/locale/generic/collate_members.cc
1224 CCTYPE_CC=config/locale/generic/ctype_members.cc
1225 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1226 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1227 CMONEY_CC=config/locale/generic/monetary_members.cc
1228 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1229 CTIME_H=config/locale/generic/time_members.h
1230 CTIME_CC=config/locale/generic/time_members.cc
1231 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1235 # This is where the testsuite looks for locale catalogs, using the
1236 # -DLOCALEDIR define during testsuite compilation.
1237 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1238 AC_SUBST(glibcxx_localedir)
1240 # A standalone libintl (e.g., GNU libintl) may be in use.
1241 if test $USE_NLS = yes; then
1242 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1243 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1245 if test $USE_NLS = yes; then
1246 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1247 [Define if NLS translations are to be used.])
1252 AC_SUBST(CMESSAGES_H)
1253 AC_SUBST(CCODECVT_CC)
1254 AC_SUBST(CCOLLATE_CC)
1256 AC_SUBST(CMESSAGES_CC)
1258 AC_SUBST(CNUMERIC_CC)
1261 AC_SUBST(CLOCALE_CC)
1262 AC_SUBST(CLOCALE_INTERNAL_H)
1267 dnl Check for which std::allocator base class to use. The choice is
1268 dnl mapped from a subdirectory of include/ext.
1272 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1273 AC_MSG_CHECKING([for std::allocator base class])
1274 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1275 [use KIND for target std::allocator base],
1276 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1278 # If they didn't use this option switch, or if they specified --enable
1279 # with no specific model, we'll have to look for one. If they
1280 # specified --disable (???), do likewise.
1281 if test $enable_libstdcxx_allocator = no ||
1282 test $enable_libstdcxx_allocator = yes;
1284 enable_libstdcxx_allocator=auto
1287 # Either a known package, or "auto". Auto implies the default choice
1288 # for a particular platform.
1289 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1291 # Probe for host-specific support if no specific model is specified.
1293 if test $enable_libstdcxx_allocator_flag = auto; then
1294 case ${target_os} in
1295 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1296 enable_libstdcxx_allocator_flag=new
1299 enable_libstdcxx_allocator_flag=new
1303 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1306 # Set configure bits for specified locale package
1307 case ${enable_libstdcxx_allocator_flag} in
1309 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1310 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1313 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1314 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1317 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1318 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1321 ALLOCATOR_H=config/allocator/new_allocator_base.h
1322 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1325 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1326 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1330 AC_SUBST(ALLOCATOR_H)
1331 AC_SUBST(ALLOCATOR_NAME)
1336 dnl Check for whether the Boost-derived checks should be turned on.
1338 dnl --enable-concept-checks turns them on.
1339 dnl --disable-concept-checks leaves them off.
1340 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1341 dnl Where DEFAULT is either `yes' or `no'.
1343 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1344 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1345 if test $enable_concept_checks = yes; then
1346 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1347 [Define to use concept checking code from the boost libraries.])
1353 dnl Check for which I/O library to use: stdio, or something specific.
1355 dnl Default is stdio.
1357 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1358 AC_MSG_CHECKING([for underlying I/O to use])
1359 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1360 [use target-specific I/O package], [permit stdio])
1362 # Now that libio has been removed, you can have any color you want as long
1363 # as it's black. This is one big no-op until other packages are added, but
1364 # showing the framework never hurts.
1365 case ${enable_cstdio} in
1367 CSTDIO_H=config/io/c_io_stdio.h
1368 BASIC_FILE_H=config/io/basic_file_stdio.h
1369 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1370 AC_MSG_RESULT(stdio)
1375 AC_SUBST(BASIC_FILE_H)
1376 AC_SUBST(BASIC_FILE_CC)
1381 dnl Check for "unusual" flags to pass to the compiler while building.
1383 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1384 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1385 dnl --disable-cxx-flags passes nothing.
1386 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1387 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1388 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1389 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1390 dnl If "default flags" is an empty string, the effect is the same
1391 dnl as --disable or --enable=no.
1393 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1394 AC_MSG_CHECKING([for extra compiler flags for building])
1395 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1396 [pass compiler FLAGS when building library],
1397 [case "x$enable_cxx_flags" in
1398 xno | x) enable_cxx_flags= ;;
1400 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1403 # Run through flags (either default or command-line) and set anything
1404 # extra (e.g., #defines) that must accompany particular g++ options.
1405 if test -n "$enable_cxx_flags"; then
1406 for f in $enable_cxx_flags; do
1410 *) # and we're trying to pass /what/ exactly?
1411 AC_MSG_ERROR([compiler flags start with a -]) ;;
1416 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1417 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1418 AC_SUBST(EXTRA_CXX_FLAGS)
1423 dnl Check to see if debugging libraries are to be built.
1425 dnl --enable-libstdcxx-debug
1426 dnl builds a separate set of debugging libraries in addition to the
1427 dnl normal (shared, static) libstdc++ binaries.
1429 dnl --disable-libstdcxx-debug
1430 dnl builds only one (non-debug) version of libstdc++.
1432 dnl --enable-libstdcxx-debug-flags=FLAGS
1433 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1435 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1436 dnl Where DEFAULT is either `yes' or `no'.
1438 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1439 AC_MSG_CHECKING([for additional debug build])
1440 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1441 AC_MSG_RESULT($enable_libstdcxx_debug)
1442 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1447 dnl Check for explicit debug flags.
1449 dnl --enable-libstdcxx-debug-flags='-O1'
1450 dnl is a general method for passing flags to be used when
1451 dnl building debug libraries with --enable-debug.
1453 dnl --disable-libstdcxx-debug-flags does nothing.
1454 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1455 dnl If "default flags" is an empty string, the effect is the same
1456 dnl as --disable or --enable=no.
1458 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1459 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1460 [pass compiler FLAGS when building debug library],
1461 [case "x$enable_libstdcxx_debug_flags" in
1462 xno | x) enable_libstdcxx_debug_flags= ;;
1464 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1467 # Option parsed, now set things appropriately
1468 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1469 AC_SUBST(DEBUG_FLAGS)
1471 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1476 dnl Check if the user only wants a freestanding library implementation.
1478 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1479 dnl installing only the headers required by [17.4.1.3] and the language
1480 dnl support library. More than that will be built (to keep the Makefiles
1481 dnl conveniently clean), but not installed.
1484 dnl is_hosted (yes/no)
1487 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1489 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1490 AC_ARG_ENABLE([hosted-libstdcxx],
1491 AC_HELP_STRING([--disable-hosted-libstdcxx],
1492 [only build freestanding C++ runtime support]),,
1495 enable_hosted_libstdcxx=no
1498 enable_hosted_libstdcxx=yes
1501 if test "$enable_hosted_libstdcxx" = no; then
1502 AC_MSG_NOTICE([Only freestanding libraries will be built])
1506 enable_libstdcxx_pch=no
1511 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1512 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1513 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1518 dnl Check for template specializations for the 'long long' type.
1519 dnl The result determines only whether 'long long' I/O is enabled; things
1520 dnl like numeric_limits<> specializations are always available.
1522 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1523 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1524 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1525 dnl Where DEFAULT is either `yes' or `no'.
1527 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1528 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1529 if test $enable_long_long = yes; then
1530 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1531 [Define if code specialized for long long should be used.])
1533 AC_MSG_CHECKING([for enabled long long specializations])
1534 AC_MSG_RESULT([$enable_long_long])
1539 dnl Check for template specializations for the 'wchar_t' type.
1541 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1542 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1543 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1544 dnl Where DEFAULT is either `yes' or `no'.
1546 dnl Necessary support (probed along with C99 support) must also be present.
1548 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1549 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1550 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1551 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1552 [Define if code specialized for wchar_t should be used.])
1554 AC_MSG_CHECKING([for enabled wchar_t specializations])
1555 AC_MSG_RESULT([$enable_wchar_t])
1560 dnl Check to see if building and using a C++ precompiled header can be done.
1562 dnl --enable-libstdcxx-pch=yes
1563 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1564 dnl may work, after some light-hearted attempts to puzzle out compiler
1565 dnl support, flip bits on in include/Makefile.am
1567 dnl --disable-libstdcxx-pch
1568 dnl turns off attempts to use or build stdc++.h.gch.
1571 dnl glibcxx_PCHFLAGS
1573 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1574 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1575 if test $enable_libstdcxx_pch = yes; then
1576 AC_CACHE_CHECK([for compiler with PCH support],
1577 [glibcxx_cv_prog_CXX_pch],
1578 [ac_save_CXXFLAGS="$CXXFLAGS"
1579 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1582 echo '#include <math.h>' > conftest.h
1583 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1584 -o conftest.h.gch 1>&5 2>&1 &&
1585 echo '#error "pch failed"' > conftest.h &&
1586 echo '#include "conftest.h"' > conftest.cc &&
1587 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1589 glibcxx_cv_prog_CXX_pch=yes
1591 glibcxx_cv_prog_CXX_pch=no
1594 CXXFLAGS=$ac_save_CXXFLAGS
1597 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1600 AC_MSG_CHECKING([for enabled PCH])
1601 AC_MSG_RESULT([$enable_libstdcxx_pch])
1603 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1604 if test $enable_libstdcxx_pch = yes; then
1605 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1609 AC_SUBST(glibcxx_PCHFLAGS)
1614 dnl Check for exception handling support. If an explicit enable/disable
1615 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1616 dnl target may or may not support call frame exceptions.
1618 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1619 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1620 dnl Neither one forces an attempt at detection.
1623 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1625 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1626 AC_MSG_CHECKING([for exception model to use])
1629 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1630 [force use of builtin_setjmp for exceptions],
1631 [permit yes|no|auto])
1633 if test $enable_sjlj_exceptions = auto; then
1634 # Botheration. Now we've got to detect the exception model. Link tests
1635 # against libgcc.a are problematic since we've not been given proper -L
1636 # bits for single-tree newlib and libgloss.
1638 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1639 cat > conftest.$ac_ext << EOF
1640 [#]line __oline__ "configure"
1649 old_CXXFLAGS="$CXXFLAGS"
1651 if AC_TRY_EVAL(ac_compile); then
1652 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1653 enable_sjlj_exceptions=yes
1654 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1655 enable_sjlj_exceptions=no
1656 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
1657 enable_sjlj_exceptions=no
1660 CXXFLAGS="$old_CXXFLAGS"
1664 # This is a tad weird, for hysterical raisins. We have to map
1665 # enable/disable to two different models.
1666 case $enable_sjlj_exceptions in
1668 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1669 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1670 ac_exception_model_name=sjlj
1673 ac_exception_model_name="call frame"
1676 AC_MSG_ERROR([unable to detect exception model])
1680 AC_MSG_RESULT($ac_exception_model_name)
1685 dnl Add version tags to symbols in shared library (or not), additionally
1686 dnl marking other symbols as private/local (or not).
1688 dnl --enable-symvers=style adds a version script to the linker call when
1689 dnl creating the shared library. The choice of version script is
1690 dnl controlled by 'style'.
1691 dnl --disable-symvers does not.
1692 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1693 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1694 dnl choose a default style based on linker characteristics. Passing
1695 dnl 'no' disables versioning.
1697 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1699 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1700 [enables symbol versioning of the shared library],
1701 [permit yes|no|gnu|darwin-export])
1703 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1704 # don't know enough about $LD to do tricks...
1705 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1707 # Turn a 'yes' into a suitable default.
1708 if test x$enable_symvers = xyes ; then
1709 if test $enable_shared = no ||
1710 test "x$LD" = x ; then
1712 elif test $with_gnu_ld = yes ; then
1715 case ${target_os} in
1717 enable_symvers=darwin-export ;;
1719 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1720 AC_MSG_WARN([=== you are not using a supported linker.])
1721 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1722 enable_symvers=no ;;
1727 # Check to see if 'gnu' can win.
1728 if test $enable_symvers = gnu; then
1729 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1730 AC_MSG_CHECKING([for shared libgcc])
1731 ac_save_CFLAGS="$CFLAGS"
1733 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1734 CFLAGS="$ac_save_CFLAGS"
1735 if test $glibcxx_shared_libgcc = no; then
1736 cat > conftest.c <<EOF
1737 int main (void) { return 0; }
1740 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1741 -shared -shared-libgcc -o conftest.so \
1742 conftest.c -v 2>&1 >/dev/null \
1743 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1745 rm -f conftest.c conftest.so
1746 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1747 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1748 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1749 CFLAGS="$ac_save_CFLAGS"
1752 AC_MSG_RESULT($glibcxx_shared_libgcc)
1754 # For GNU ld, we need at least this version. The format is described in
1755 # GLIBCXX_CHECK_LINKER_FEATURES above.
1756 glibcxx_min_gnu_ld_version=21400
1758 # If no shared libgcc, can't win.
1759 if test $glibcxx_shared_libgcc != yes; then
1760 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
1761 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
1762 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1764 elif test $with_gnu_ld != yes ; then
1766 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
1767 AC_MSG_WARN([=== you are not using the GNU linker.])
1768 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1770 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
1771 # The right tools, the right setup, but too old. Fallbacks?
1772 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1773 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1774 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1775 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1776 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1781 # Everything parsed; figure out what file to use.
1782 case $enable_symvers in
1784 SYMVER_MAP=config/linker-map.dummy
1787 SYMVER_MAP=config/linker-map.gnu
1788 AC_DEFINE(_GLIBCXX_SYMVER, 1,
1789 [Define to use GNU symbol versioning in the shared library.])
1792 SYMVER_MAP=config/linker-map.gnu
1796 # In addition, need this to deal with std::size_t mangling in
1797 # src/compatibility.cc. In a perfect world, could use
1798 # typeid(std::size_t).name()[0] to do direct substitution.
1799 AC_MSG_CHECKING([for size_t as unsigned int])
1800 ac_save_CFLAGS="$CFLAGS"
1802 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
1803 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
1804 CFLAGS=$ac_save_CFLAGS
1805 if test "$glibcxx_size_t_is_i" = yes; then
1806 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
1808 AC_MSG_RESULT([$glibcxx_size_t_is_i])
1810 AC_MSG_CHECKING([for ptrdiff_t as int])
1811 ac_save_CFLAGS="$CFLAGS"
1813 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
1814 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
1815 CFLAGS=$ac_save_CFLAGS
1816 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
1817 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
1819 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
1821 AC_SUBST(SYMVER_MAP)
1822 AC_SUBST(port_specific_symbol_files)
1823 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
1824 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN_EXPORT, dnl
1825 test $enable_symvers = darwin-export)
1826 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1831 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1832 dnl We must stage the required headers so that they will be installed
1833 dnl with the library (unlike libgcc, the STL implementation is provided
1834 dnl solely within headers). Since we must not inject random user-space
1835 dnl macro names into user-provided C++ code, we first stage into <file>-in
1836 dnl and process to <file> with an output command. The reason for a two-
1837 dnl stage process here is to correctly handle $srcdir!=$objdir without
1838 dnl having to write complex code (the sed commands to clean the macro
1839 dnl namespace are complex and fragile enough as it is). We must also
1840 dnl add a relative path so that -I- is supported properly.
1843 dnl glibcxx_thread_h
1846 dnl HAVE_GTHR_DEFAULT
1848 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1849 AC_MSG_CHECKING([for thread model used by GCC])
1850 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1851 AC_MSG_RESULT([$target_thread_file])
1853 if test $target_thread_file != single; then
1854 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
1855 [Define if gthr-default.h exists
1856 (meaning that threading support is enabled).])
1859 glibcxx_thread_h=gthr-$target_thread_file.h
1861 dnl Check for __GTHREADS define.
1862 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1863 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1869 AC_SUBST(glibcxx_thread_h)
1873 # Check whether LC_MESSAGES is available in <locale.h>.
1874 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1876 # This file file be copied and used freely without restrictions. It can
1877 # be used in projects which are not available under the GNU Public License
1878 # but which still want to provide support for the GNU gettext functionality.
1879 # Please note that the actual code is *not* freely available.
1882 AC_DEFUN([AC_LC_MESSAGES], [
1883 AC_CHECK_HEADER(locale.h, [
1884 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1885 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1886 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1887 if test $ac_cv_val_LC_MESSAGES = yes; then
1888 AC_DEFINE(HAVE_LC_MESSAGES, 1,
1889 [Define if LC_MESSAGES is available in <locale.h>.])
1894 # Macros from the top-level gcc directory.
1895 m4_include([../config/tls.m4])