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($ac_fdsections)
179 AC_SUBST(SECTION_FLAGS)
184 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
185 dnl the native linker is in use, all variables will be defined to something
186 dnl safe (like an empty string).
189 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
190 dnl OPT_LDFLAGS='-Wl,-O1' if possible
191 dnl LD (as a side effect of testing)
194 dnl glibcxx_gnu_ld_version (possibly)
196 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
197 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
199 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
200 # If we're not using GNU ld, then there's no point in even trying these
201 # tests. Check for that first. We should have already tested for gld
202 # by now (in libtool), but require it now just to be safe...
203 test -z "$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)
270 # Set linker optimization flags.
271 if test x"$with_gnu_ld" = x"yes"; then
272 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
275 AC_SUBST(SECTION_LDFLAGS)
276 AC_SUBST(OPT_LDFLAGS)
281 dnl Check to see if this target can enable the iconv specializations.
282 dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
283 dnl (This must have been previously checked, along with the rest of C99
284 dnl support.) By default, iconv support is disabled.
287 dnl _GLIBCXX_USE_ICONV if all the bits are found.
289 dnl LIBICONV to a -l string containing the iconv library, if needed.
291 AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
294 # Only continue checking if the ISO C99 headers exist and support is on.
295 if test x"$enable_wchar_t" = xyes; then
297 # Use iconv for wchar_t to char conversions. As such, check for
298 # X/Open Portability Guide, version 2 features (XPG2).
299 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
300 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
302 # Check for existence of libiconv.a providing XPG2 wchar_t support.
303 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
305 LIBS="$LIBS $LIBICONV"
308 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
309 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
313 if test x"$ac_has_iconv_h" = xyes &&
314 test x"$ac_has_langinfo_h" = xyes &&
315 test x"$ac_XPG2funcs" = xyes;
317 AC_DEFINE([_GLIBCXX_USE_ICONV],1,
318 [Define if iconv and related functions exist and are usable.])
322 AC_MSG_CHECKING([for enabled iconv specializations])
323 AC_MSG_RESULT($enable_iconv)
328 dnl Check for headers for, and arguments to, the setrlimit() function.
329 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
332 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
333 dnl various HAVE_LIMIT_* for individual limit names
335 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
338 #include <sys/time.h>
339 #include <sys/resource.h>
341 [ int f = RLIMIT_$1 ; ],
342 [glibcxx_mresult=1], [glibcxx_mresult=0])
343 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
344 [Only used in build directory testsuite_hooks.h.])
347 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
348 setrlimit_have_headers=yes
349 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
351 [setrlimit_have_headers=no])
352 # If don't have the headers, then we can't run the tests now, and we
353 # won't be seeing any of these during testsuite compilation.
354 if test $setrlimit_have_headers = yes; then
355 # Can't do these in a loop, else the resulting syntax is wrong.
356 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
357 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
358 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
359 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
360 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
362 # Check for rlimit, setrlimit.
363 AC_CACHE_VAL(ac_setrlimit, [
366 #include <sys/time.h>
367 #include <sys/resource.h>
371 [ac_setrlimit=yes], [ac_setrlimit=no])
375 AC_MSG_CHECKING([for testsuite resource limits support])
376 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
378 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
379 [Define if using setrlimit to set resource limits during
384 AC_MSG_RESULT($ac_res_limits)
389 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
390 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
392 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
393 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
395 [#include <sys/stat.h>],
398 S_ISREG(buffer.st_mode);],
399 [glibcxx_cv_S_ISREG=yes],
400 [glibcxx_cv_S_ISREG=no])
402 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
404 [#include <sys/stat.h>],
407 S_IFREG & buffer.st_mode;],
408 [glibcxx_cv_S_IFREG=yes],
409 [glibcxx_cv_S_IFREG=no])
411 if test $glibcxx_cv_S_ISREG = yes; then
412 AC_DEFINE(HAVE_S_ISREG, 1,
413 [Define if S_IFREG is available in <sys/stat.h>.])
414 elif test $glibcxx_cv_S_IFREG = yes; then
415 AC_DEFINE(HAVE_S_IFREG, 1,
416 [Define if S_IFREG is available in <sys/stat.h>.])
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
435 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
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, 1, [Define if writev is available in <sys/uio.h>.])
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 $glibcxx_cv_INT64_T = yes; then
470 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
476 dnl Check whether LFS support is available.
478 AC_DEFUN([GLIBCXX_CHECK_LFS], [
481 ac_save_CXXFLAGS="$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 $glibcxx_cv_LFS = yes; then
500 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
502 CXXFLAGS="$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, 1,
522 [Define if a fully dynamic basic_string is wanted.])
528 dnl Does any necessary configuration of the testsuite directory. Generates
529 dnl the testsuite_hooks.h header.
531 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
534 dnl enable_abi_check / GLIBCXX_TEST_ABI
535 dnl GLIBCXX_TEST_WCHAR_T
536 dnl GLIBCXX_TEST_THREAD
540 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
541 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
542 # Do checks for resource limit functions.
543 GLIBCXX_CHECK_SETRLIMIT
545 # Look for setenv, so that extended locale tests can be performed.
546 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
548 if test $enable_symvers = no; then
553 enable_abi_check=no ;;
555 enable_abi_check=yes ;;
559 # Only build this as native, since automake does not understand
564 # Export file names for ABI checking.
565 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
566 AC_SUBST(baseline_dir)
568 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
573 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
577 dnl TOPLEVEL_INCLUDES
579 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
580 # Used for every C++ compile we perform.
582 -I$glibcxx_builddir/include/$host_alias \
583 -I$glibcxx_builddir/include \
584 -I$glibcxx_srcdir/libsupc++"
586 # For Canadian crosses, pick this up too.
587 if test $CANADIAN = yes; then
588 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
591 # Stuff in the actual top level. Currently only used by libsupc++ to
592 # get unwind* headers from the gcc dir.
593 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
594 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
596 # Now, export this to all the little Makefiles....
597 AC_SUBST(GLIBCXX_INCLUDES)
598 AC_SUBST(TOPLEVEL_INCLUDES)
603 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
604 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
607 dnl OPTIMIZE_CXXFLAGS
610 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
611 # Optimization flags that are probably a good idea for thrill-seekers. Just
612 # uncomment the lines below and make, everything else is ready to go...
613 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
615 AC_SUBST(OPTIMIZE_CXXFLAGS)
617 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
623 dnl All installation directory information is determined here.
627 dnl glibcxx_prefixdir
628 dnl glibcxx_toolexecdir
629 dnl glibcxx_toolexeclibdir
631 dnl Assumes cross_compiling bits already done, and with_cross_host in
634 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
635 glibcxx_toolexecdir=no
636 glibcxx_toolexeclibdir=no
637 glibcxx_prefixdir=$prefix
639 AC_MSG_CHECKING([for gxx-include-dir])
640 AC_ARG_WITH([gxx-include-dir],
641 AC_HELP_STRING([--with-gxx-include-dir=DIR],
642 [installation directory for include files]),
644 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
645 no) gxx_include_dir=no ;;
646 *) gxx_include_dir=$withval ;;
648 [gxx_include_dir=no])
649 AC_MSG_RESULT($gxx_include_dir)
651 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
652 AC_ARG_ENABLE([version-specific-runtime-libs],
653 AC_HELP_STRING([--enable-version-specific-runtime-libs],
654 [Specify that runtime libraries should be installed in a compiler-specific directory]),
655 [case "$enableval" in
656 yes) version_specific_libs=yes ;;
657 no) version_specific_libs=no ;;
658 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
660 [version_specific_libs=no])
661 AC_MSG_RESULT($version_specific_libs)
663 # Default case for install directory for include files.
664 if test $version_specific_libs = no && test $gxx_include_dir = no; then
665 gxx_include_dir='${prefix}/include/c++/${gcc_version}'
668 # Version-specific runtime libs processing.
669 if test $version_specific_libs = yes; then
670 # Need the gcc compiler version to know where to install libraries
671 # and header files if --enable-version-specific-runtime-libs option
672 # is selected. FIXME: these variables are misnamed, there are
673 # no executables installed in _toolexecdir or _toolexeclibdir.
674 if test x"$gxx_include_dir" = x"no"; then
675 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
677 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
678 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
681 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
682 # Install a library built with a cross compiler in tooldir, not libdir.
683 if test x"$glibcxx_toolexecdir" = x"no"; then
684 if test -n "$with_cross_host" &&
685 test x"$with_cross_host" != x"no"; then
686 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
687 glibcxx_toolexeclibdir='${toolexecdir}/lib'
689 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
690 glibcxx_toolexeclibdir='${libdir}'
692 multi_os_directory=`$CXX -print-multi-os-directory`
693 case $multi_os_directory in
694 .) ;; # Avoid trailing /.
695 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
699 AC_MSG_CHECKING([for install location])
700 AC_MSG_RESULT($gxx_include_dir)
702 AC_SUBST(glibcxx_prefixdir)
703 AC_SUBST(gxx_include_dir)
704 AC_SUBST(glibcxx_toolexecdir)
705 AC_SUBST(glibcxx_toolexeclibdir)
711 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
712 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
713 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
715 dnl See docs/html/17_intro/configury.html#enable for documentation.
717 m4_define([GLIBCXX_ENABLE],[dnl
718 m4_define([_g_switch],[--enable-$1])dnl
719 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
720 AC_ARG_ENABLE($1,_g_help,
725 m4_bpatsubst([$5],[permit ])) ;;
726 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
727 dnl Idea for future: generate a URL pointing to
728 dnl "onlinedocs/configopts.html#whatever"
735 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
739 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
740 m4_undefine([_g_switch])dnl
741 m4_undefine([_g_help])dnl
746 dnl Check for ISO/IEC 9899:1999 "C99" support.
748 dnl --enable-c99 defines _GLIBCXX_USE_C99
749 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
750 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
751 dnl Where DEFAULT is either `yes' or `no'.
752 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
754 AC_DEFUN([GLIBCXX_ENABLE_C99], [
755 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
757 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos
758 # even if C99 support is turned off.
759 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
760 AC_MSG_CHECKING([for mbstate_t])
761 AC_TRY_COMPILE([#include <wchar.h>],
762 [mbstate_t teststate;],
763 have_mbstate_t=yes, have_mbstate_t=no)
764 AC_MSG_RESULT($have_mbstate_t)
765 if test x"$have_mbstate_t" = xyes; then
766 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
769 if test x"$enable_c99" = x"yes"; then
774 # Check for the existence of <math.h> functions used if C99 is enabled.
775 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
776 AC_CACHE_VAL(ac_c99_math, [
777 AC_TRY_COMPILE([#include <math.h>],
785 isgreaterequal(0.0,0.0);
787 islessequal(0.0,0.0);
788 islessgreater(0.0,0.0);
789 islessgreater(0.0,0.0);
790 isunordered(0.0,0.0);
791 ],[ac_c99_math=yes], [ac_c99_math=no])
793 AC_MSG_RESULT($ac_c99_math)
794 if test x"$ac_c99_math" = x"yes"; then
795 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
796 [Define if C99 functions or macros in <math.h> should be imported
797 in <cmath> in namespace std.])
800 # Check for the existence of <complex.h> complex functions.
801 # This is necessary even though libstdc++ uses the builtin versions
802 # of these functions, because if the builtin cannot be used, a reference
803 # to the library function is emitted.
804 # In addition, need to explicitly specify "C" compilation for this
805 # one, or else the backwards C++ <complex.h> include will be selected.
806 save_CXXFLAGS="$CXXFLAGS"
807 CXXFLAGS="$CXXFLAGS -x c"
808 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
810 if test x"$ac_has_complex_h" = x"yes"; then
811 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
812 AC_TRY_COMPILE([#include <complex.h>],
813 [typedef __complex__ float float_type; float_type tmpf;
826 typedef __complex__ double double_type; double_type tmpd;
839 typedef __complex__ long double ld_type; ld_type tmpld;
852 ],[ac_c99_complex=yes], [ac_c99_complex=no])
854 CXXFLAGS="$save_CXXFLAGS"
855 AC_MSG_RESULT($ac_c99_complex)
856 if test x"$ac_c99_complex" = x"yes"; then
857 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
858 [Define if C99 functions in <complex.h> should be used in
859 <complex>. Using compiler builtins for these functions requires
860 corresponding C99 library functions to be present.])
863 # Check for the existence in <stdio.h> of vscanf, et. al.
864 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
865 AC_CACHE_VAL(ac_c99_stdio, [
866 AC_TRY_COMPILE([#include <stdio.h>
868 void foo(char* fmt, ...)
870 va_list args; va_start(args, fmt);
871 vfscanf(stderr, "%i", args);
873 vsnprintf(fmt, 0, "%i", args);
874 vsscanf(fmt, "%i", args);
876 [snprintf("12", 0, "%i");],
877 [ac_c99_stdio=yes], [ac_c99_stdio=no])
879 AC_MSG_RESULT($ac_c99_stdio)
881 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
882 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
883 AC_CACHE_VAL(ac_c99_stdlib, [
884 AC_TRY_COMPILE([#include <stdlib.h>],
887 strtold("gnu", &tmp);
888 strtoll("gnu", &tmp, 10);
889 strtoull("gnu", &tmp, 10);
894 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
896 AC_MSG_RESULT($ac_c99_stdlib)
898 # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
899 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
901 if test x"$ac_has_wchar_h" = xyes &&
902 test x"$ac_has_wctype_h" = xyes; then
903 AC_TRY_COMPILE([#include <wchar.h>
967 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
969 # Checks for wide character functions that may not be present.
970 # Injection of these is wrapped with guard macros.
971 # NB: only put functions here, instead of immediately above, if
972 # absolutely necessary.
973 AC_TRY_COMPILE([#include <wchar.h>
974 namespace test { using ::vfwscanf; } ], [],
975 [AC_DEFINE(HAVE_VFWSCANF,1,
976 [Defined if vfwscanf exists.])],[])
978 AC_TRY_COMPILE([#include <wchar.h>
979 namespace test { using ::vswscanf; } ], [],
980 [AC_DEFINE(HAVE_VSWSCANF,1,
981 [Defined if vswscanf exists.])],[])
983 AC_TRY_COMPILE([#include <wchar.h>
984 namespace test { using ::vwscanf; } ], [],
985 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
987 AC_TRY_COMPILE([#include <wchar.h>
988 namespace test { using ::wcstof; } ], [],
989 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
991 AC_TRY_COMPILE([#include <wctype.h>],
992 [ wint_t t; int i = iswblank(t);],
993 [AC_DEFINE(HAVE_ISWBLANK,1,
994 [Defined if iswblank exists.])],[])
996 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
997 AC_MSG_RESULT($ac_c99_wchar)
1000 # Option parsed, now set things appropriately.
1001 if test x"$ac_c99_math" = x"no" ||
1002 test x"$ac_c99_complex" = x"no" ||
1003 test x"$ac_c99_stdio" = x"no" ||
1004 test x"$ac_c99_stdlib" = x"no" ||
1005 test x"$ac_c99_wchar" = x"no"; then
1008 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1009 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1010 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1016 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1017 AC_MSG_RESULT($enable_c99)
1022 dnl Check for what type of C headers to use.
1024 dnl --enable-cheaders= [does stuff].
1025 dnl --disable-cheaders [does not do anything, really].
1026 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1027 dnl Where DEFAULT is either `c' or `c_std'.
1029 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1030 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1031 [construct "C" headers for g++], [permit c|c_std])
1032 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1034 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1036 AC_SUBST(C_INCLUDE_DIR)
1037 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1038 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1039 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1044 dnl Check for which locale library to use. The choice is mapped to
1045 dnl a subdirectory of config/locale.
1047 dnl Default is generic.
1049 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1050 AC_MSG_CHECKING([for C locale to use])
1051 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1052 [use MODEL for target locale package],
1053 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1055 # If they didn't use this option switch, or if they specified --enable
1056 # with no specific model, we'll have to look for one. If they
1057 # specified --disable (???), do likewise.
1058 if test $enable_clocale = no || test $enable_clocale = yes; then
1062 # Either a known package, or "auto"
1063 enable_clocale_flag=$enable_clocale
1065 # Probe for locale support if no specific model is specified.
1066 # Default to "generic".
1067 if test $enable_clocale_flag = auto; then
1068 case ${target_os} in
1069 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1070 AC_EGREP_CPP([_GLIBCXX_ok], [
1071 #include <features.h>
1072 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1075 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1077 # Test for bugs early in glibc-2.2.x series
1078 if test $enable_clocale_flag = gnu; then
1080 #define _GNU_SOURCE 1
1083 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1084 extern __typeof(newlocale) __newlocale;
1085 extern __typeof(duplocale) __duplocale;
1086 extern __typeof(strcoll_l) __strcoll_l;
1090 const char __one[] = "Äuglein Augmen";
1091 const char __two[] = "Äuglein";
1096 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1097 loc_dup = __duplocale(loc);
1098 i = __strcoll_l(__one, __two, loc);
1099 j = __strcoll_l(__one, __two, loc_dup);
1103 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1104 [enable_clocale_flag=generic])
1107 # ... at some point put __strxfrm_l tests in as well.
1110 enable_clocale_flag=darwin
1113 enable_clocale_flag=generic
1118 # Deal with gettext issues. Default to not using it (=no) until we detect
1119 # support for it later. Let the user turn it off via --e/d, but let that
1120 # default to on for easier handling.
1123 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1127 # Set configure bits for specified locale package
1128 case ${enable_clocale_flag} in
1130 AC_MSG_RESULT(generic)
1132 CLOCALE_H=config/locale/generic/c_locale.h
1133 CLOCALE_CC=config/locale/generic/c_locale.cc
1134 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1135 CCOLLATE_CC=config/locale/generic/collate_members.cc
1136 CCTYPE_CC=config/locale/generic/ctype_members.cc
1137 CMESSAGES_H=config/locale/generic/messages_members.h
1138 CMESSAGES_CC=config/locale/generic/messages_members.cc
1139 CMONEY_CC=config/locale/generic/monetary_members.cc
1140 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1141 CTIME_H=config/locale/generic/time_members.h
1142 CTIME_CC=config/locale/generic/time_members.cc
1143 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1146 AC_MSG_RESULT(darwin or freebsd)
1148 CLOCALE_H=config/locale/generic/c_locale.h
1149 CLOCALE_CC=config/locale/generic/c_locale.cc
1150 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1151 CCOLLATE_CC=config/locale/generic/collate_members.cc
1152 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1153 CMESSAGES_H=config/locale/generic/messages_members.h
1154 CMESSAGES_CC=config/locale/generic/messages_members.cc
1155 CMONEY_CC=config/locale/generic/monetary_members.cc
1156 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1157 CTIME_H=config/locale/generic/time_members.h
1158 CTIME_CC=config/locale/generic/time_members.cc
1159 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1165 # Declare intention to use gettext, and add support for specific
1167 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1170 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1171 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1172 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1175 # Export the build objects.
1176 for ling in $ALL_LINGUAS; do \
1177 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1178 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1180 AC_SUBST(glibcxx_MOFILES)
1181 AC_SUBST(glibcxx_POFILES)
1183 CLOCALE_H=config/locale/gnu/c_locale.h
1184 CLOCALE_CC=config/locale/gnu/c_locale.cc
1185 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1186 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1187 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1188 CMESSAGES_H=config/locale/gnu/messages_members.h
1189 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1190 CMONEY_CC=config/locale/gnu/monetary_members.cc
1191 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1192 CTIME_H=config/locale/gnu/time_members.h
1193 CTIME_CC=config/locale/gnu/time_members.cc
1194 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1197 AC_MSG_RESULT(IEEE 1003.1)
1199 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1200 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1201 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1202 CCOLLATE_CC=config/locale/generic/collate_members.cc
1203 CCTYPE_CC=config/locale/generic/ctype_members.cc
1204 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1205 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1206 CMONEY_CC=config/locale/generic/monetary_members.cc
1207 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1208 CTIME_H=config/locale/generic/time_members.h
1209 CTIME_CC=config/locale/generic/time_members.cc
1210 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1214 # This is where the testsuite looks for locale catalogs, using the
1215 # -DLOCALEDIR define during testsuite compilation.
1216 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1217 AC_SUBST(glibcxx_localedir)
1219 # A standalone libintl (e.g., GNU libintl) may be in use.
1220 if test $USE_NLS = yes; then
1221 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1222 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1224 if test $USE_NLS = yes; then
1225 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1226 [Define if NLS translations are to be used.])
1231 AC_SUBST(CMESSAGES_H)
1232 AC_SUBST(CCODECVT_CC)
1233 AC_SUBST(CCOLLATE_CC)
1235 AC_SUBST(CMESSAGES_CC)
1237 AC_SUBST(CNUMERIC_CC)
1240 AC_SUBST(CLOCALE_CC)
1241 AC_SUBST(CLOCALE_INTERNAL_H)
1246 dnl Check for which std::allocator base class to use. The choice is
1247 dnl mapped from a subdirectory of include/ext.
1251 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1252 AC_MSG_CHECKING([for std::allocator base class])
1253 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1254 [use KIND for target std::allocator base],
1255 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1257 # If they didn't use this option switch, or if they specified --enable
1258 # with no specific model, we'll have to look for one. If they
1259 # specified --disable (???), do likewise.
1260 if test $enable_libstdcxx_allocator = no ||
1261 test $enable_libstdcxx_allocator = yes;
1263 enable_libstdcxx_allocator=auto
1266 # Either a known package, or "auto". Auto implies the default choice
1267 # for a particular platform.
1268 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1270 # Probe for host-specific support if no specific model is specified.
1272 if test $enable_libstdcxx_allocator_flag = auto; then
1273 case ${target_os} in
1274 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1275 enable_libstdcxx_allocator_flag=mt
1278 enable_libstdcxx_allocator_flag=new
1282 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1285 # Set configure bits for specified locale package
1286 case ${enable_libstdcxx_allocator_flag} in
1288 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1289 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1292 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1293 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1296 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1297 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1300 ALLOCATOR_H=config/allocator/new_allocator_base.h
1301 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1304 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1305 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1309 AC_SUBST(ALLOCATOR_H)
1310 AC_SUBST(ALLOCATOR_NAME)
1315 dnl Check for whether the Boost-derived checks should be turned on.
1317 dnl --enable-concept-checks turns them on.
1318 dnl --disable-concept-checks leaves them off.
1319 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1320 dnl Where DEFAULT is either `yes' or `no'.
1322 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1323 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1324 if test $enable_concept_checks = yes; then
1325 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1326 [Define to use concept checking code from the boost libraries.])
1332 dnl Check for which I/O library to use: stdio, or something specific.
1334 dnl Default is stdio.
1336 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1337 AC_MSG_CHECKING([for underlying I/O to use])
1338 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1339 [use target-specific I/O package], [permit stdio])
1341 # Now that libio has been removed, you can have any color you want as long
1342 # as it's black. This is one big no-op until other packages are added, but
1343 # showing the framework never hurts.
1344 case ${enable_cstdio} in
1346 CSTDIO_H=config/io/c_io_stdio.h
1347 BASIC_FILE_H=config/io/basic_file_stdio.h
1348 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1349 AC_MSG_RESULT(stdio)
1354 AC_SUBST(BASIC_FILE_H)
1355 AC_SUBST(BASIC_FILE_CC)
1360 dnl Check for "unusual" flags to pass to the compiler while building.
1362 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1363 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1364 dnl --disable-cxx-flags passes nothing.
1365 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1366 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1367 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1368 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1369 dnl If "default flags" is an empty string, the effect is the same
1370 dnl as --disable or --enable=no.
1372 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1373 AC_MSG_CHECKING([for extra compiler flags for building])
1374 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1375 [pass compiler FLAGS when building library],
1376 [case "x$enable_cxx_flags" in
1377 xno | x) enable_cxx_flags= ;;
1379 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1382 # Run through flags (either default or command-line) and set anything
1383 # extra (e.g., #defines) that must accompany particular g++ options.
1384 if test -n "$enable_cxx_flags"; then
1385 for f in $enable_cxx_flags; do
1389 *) # and we're trying to pass /what/ exactly?
1390 AC_MSG_ERROR([compiler flags start with a -]) ;;
1395 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1396 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1397 AC_SUBST(EXTRA_CXX_FLAGS)
1402 dnl Check to see if debugging libraries are to be built.
1404 dnl --enable-libstdcxx-debug
1405 dnl builds a separate set of debugging libraries in addition to the
1406 dnl normal (shared, static) libstdc++ binaries.
1408 dnl --disable-libstdcxx-debug
1409 dnl builds only one (non-debug) version of libstdc++.
1411 dnl --enable-libstdcxx-debug-flags=FLAGS
1412 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1414 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1415 dnl Where DEFAULT is either `yes' or `no'.
1417 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1418 AC_MSG_CHECKING([for additional debug build])
1419 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1420 AC_MSG_RESULT($enable_libstdcxx_debug)
1421 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1426 dnl Check for explicit debug flags.
1428 dnl --enable-libstdcxx-debug-flags='-O1'
1429 dnl is a general method for passing flags to be used when
1430 dnl building debug libraries with --enable-debug.
1432 dnl --disable-libstdcxx-debug-flags does nothing.
1433 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1434 dnl If "default flags" is an empty string, the effect is the same
1435 dnl as --disable or --enable=no.
1437 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1438 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1439 [pass compiler FLAGS when building debug library],
1440 [case "x$enable_libstdcxx_debug_flags" in
1441 xno | x) enable_libstdcxx_debug_flags= ;;
1443 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1446 # Option parsed, now set things appropriately
1447 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1448 AC_SUBST(DEBUG_FLAGS)
1450 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1455 dnl Check if the user only wants a freestanding library implementation.
1457 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1458 dnl installing only the headers required by [17.4.1.3] and the language
1459 dnl support library. More than that will be built (to keep the Makefiles
1460 dnl conveniently clean), but not installed.
1463 dnl is_hosted (yes/no)
1466 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1468 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1469 AC_ARG_ENABLE([hosted-libstdcxx],
1470 AC_HELP_STRING([--disable-hosted-libstdcxx],
1471 [only build freestanding C++ runtime support]),,
1474 enable_hosted_libstdcxx=no
1477 enable_hosted_libstdcxx=yes
1480 if test "$enable_hosted_libstdcxx" = no; then
1481 AC_MSG_NOTICE([Only freestanding libraries will be built])
1485 enable_libstdcxx_pch=no
1490 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1491 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1492 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1497 dnl Check for template specializations for the 'long long' type.
1498 dnl The result determines only whether 'long long' I/O is enabled; things
1499 dnl like numeric_limits<> specializations are always available.
1501 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1502 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1503 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1504 dnl Where DEFAULT is either `yes' or `no'.
1506 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1507 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1508 if test $enable_long_long = yes; then
1509 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1510 [Define if code specialized for long long should be used.])
1512 AC_MSG_CHECKING([for enabled long long specializations])
1513 AC_MSG_RESULT([$enable_long_long])
1518 dnl Check for template specializations for the 'wchar_t' type.
1520 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1521 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1522 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1523 dnl Where DEFAULT is either `yes' or `no'.
1525 dnl Necessary support (probed along with C99 support) must also be present.
1527 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1528 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1529 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1530 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1531 [Define if code specialized for wchar_t should be used.])
1533 AC_MSG_CHECKING([for enabled wchar_t specializations])
1534 AC_MSG_RESULT([$enable_wchar_t])
1539 dnl Check to see if building and using a C++ precompiled header can be done.
1541 dnl --enable-libstdcxx-pch=yes
1542 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1543 dnl may work, after some light-hearted attempts to puzzle out compiler
1544 dnl support, flip bits on in include/Makefile.am
1546 dnl --disable-libstdcxx-pch
1547 dnl turns off attempts to use or build stdc++.h.gch.
1550 dnl glibcxx_PCHFLAGS
1552 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1553 AC_MSG_CHECKING([for enabled PCH])
1554 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1555 AC_MSG_RESULT([$enable_libstdcxx_pch])
1557 if test $enable_libstdcxx_pch = yes; then
1558 AC_CACHE_CHECK([for compiler with PCH support],
1559 [glibcxx_cv_prog_CXX_pch],
1560 [ac_save_CXXFLAGS="$CXXFLAGS"
1561 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1564 echo '#include <math.h>' > conftest.h
1565 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1566 -o conftest.h.gch 1>&5 2>&1 &&
1567 echo '#error "pch failed"' > conftest.h &&
1568 echo '#include "conftest.h"' > conftest.cc &&
1569 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1571 glibcxx_cv_prog_CXX_pch=yes
1573 glibcxx_cv_prog_CXX_pch=no
1576 CXXFLAGS=$ac_save_CXXFLAGS
1579 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1582 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1583 if test $enable_libstdcxx_pch = yes; then
1584 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1588 AC_SUBST(glibcxx_PCHFLAGS)
1593 dnl Check for exception handling support. If an explicit enable/disable
1594 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1595 dnl target may or may not support call frame exceptions.
1597 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1598 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1599 dnl Neither one forces an attempt at detection.
1602 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1604 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1605 AC_MSG_CHECKING([for exception model to use])
1608 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1609 [force use of builtin_setjmp for exceptions],
1610 [permit yes|no|auto])
1612 if test $enable_sjlj_exceptions = auto; then
1613 # Botheration. Now we've got to detect the exception model. Link tests
1614 # against libgcc.a are problematic since we've not been given proper -L
1615 # bits for single-tree newlib and libgloss.
1617 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1618 cat > conftest.$ac_ext << EOF
1619 [#]line __oline__ "configure"
1628 old_CXXFLAGS="$CXXFLAGS"
1630 if AC_TRY_EVAL(ac_compile); then
1631 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1632 enable_sjlj_exceptions=yes
1633 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1634 enable_sjlj_exceptions=no
1637 CXXFLAGS="$old_CXXFLAGS"
1641 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1642 # to two different models.
1643 case $enable_sjlj_exceptions in
1645 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1646 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1647 ac_exception_model_name=sjlj
1650 ac_exception_model_name="call frame"
1653 AC_MSG_ERROR([unable to detect exception model])
1657 AC_MSG_RESULT($ac_exception_model_name)
1662 dnl Add version tags to symbols in shared library (or not), additionally
1663 dnl marking other symbols as private/local (or not).
1665 dnl --enable-symvers=style adds a version script to the linker call when
1666 dnl creating the shared library. The choice of version script is
1667 dnl controlled by 'style'.
1668 dnl --disable-symvers does not.
1669 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1670 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1671 dnl choose a default style based on linker characteristics. Passing
1672 dnl 'no' disables versioning.
1674 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1676 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1677 [enables symbol versioning of the shared library],
1678 [permit yes|no|gnu])
1680 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1681 # don't know enough about $LD to do tricks...
1682 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1683 # FIXME The following test is too strict, in theory.
1684 if test $enable_shared = no ||
1686 test x$glibcxx_gnu_ld_version = x; then
1690 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1691 if test $enable_symvers != no; then
1692 AC_MSG_CHECKING([for shared libgcc])
1693 ac_save_CFLAGS="$CFLAGS"
1695 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1696 CFLAGS="$ac_save_CFLAGS"
1697 if test $glibcxx_shared_libgcc = no; then
1698 cat > conftest.c <<EOF
1699 int main (void) { return 0; }
1702 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1703 -shared -shared-libgcc -o conftest.so \
1704 conftest.c -v 2>&1 >/dev/null \
1705 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1707 rm -f conftest.c conftest.so
1708 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1709 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1710 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1711 CFLAGS="$ac_save_CFLAGS"
1714 AC_MSG_RESULT($glibcxx_shared_libgcc)
1717 # For GNU ld, we need at least this version. The format is described in
1718 # GLIBCXX_CHECK_LINKER_FEATURES above.
1719 glibcxx_min_gnu_ld_version=21400
1720 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1722 # Check to see if unspecified "yes" value can win, given results above.
1723 # Change "yes" into either "no" or a style name.
1724 if test $enable_symvers = yes; then
1725 if test $with_gnu_ld = yes &&
1726 test $glibcxx_shared_libgcc = yes;
1728 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1731 # The right tools, the right setup, but too old. Fallbacks?
1732 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1733 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1734 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1735 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1736 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1737 # Globbing fix is present, proper block support is not.
1738 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1739 dnl enable_symvers=???
1740 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1744 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1750 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1751 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1752 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1753 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1758 # Everything parsed; figure out what file to use.
1759 case $enable_symvers in
1761 SYMVER_MAP=config/linker-map.dummy
1764 SYMVER_MAP=config/linker-map.gnu
1765 AC_DEFINE(_GLIBCXX_SYMVER, 1,
1766 [Define to use symbol versioning in the shared library.])
1770 AH_VERBATIM([_GLIBCXX_SYMVERextra],
1771 [/* Define symbol versioning in assember directives. If symbol
1772 versioning is being used, and the assembler supports this kind of
1775 NB: _GLIBCXX_AT_AT is a hack to work around quoting issues in m4. */
1778 #define _GLIBCXX_ASM_SYMVER(cur, old, version) \
1779 asm (".symver " #cur "," #old _GLIBCXX_AT_AT #version);
1781 #define _GLIBCXX_ASM_SYMVER(cur, old, version)
1784 AC_SUBST(SYMVER_MAP)
1785 AC_SUBST(port_specific_symbol_files)
1786 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1787 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1792 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1793 dnl We must stage the required headers so that they will be installed
1794 dnl with the library (unlike libgcc, the STL implementation is provided
1795 dnl solely within headers). Since we must not inject random user-space
1796 dnl macro names into user-provided C++ code, we first stage into <file>-in
1797 dnl and process to <file> with an output command. The reason for a two-
1798 dnl stage process here is to correctly handle $srcdir!=$objdir without
1799 dnl having to write complex code (the sed commands to clean the macro
1800 dnl namespace are complex and fragile enough as it is). We must also
1801 dnl add a relative path so that -I- is supported properly.
1804 dnl glibcxx_thread_h
1807 dnl HAVE_GTHR_DEFAULT
1809 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1810 AC_MSG_CHECKING([for thread model used by GCC])
1811 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1812 AC_MSG_RESULT([$target_thread_file])
1814 if test $target_thread_file != single; then
1815 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
1816 [Define if gthr-default.h exists
1817 (meaning that threading support is enabled).])
1820 glibcxx_thread_h=gthr-$target_thread_file.h
1822 dnl Check for __GTHREADS define.
1823 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1824 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1830 AC_SUBST(glibcxx_thread_h)
1834 # Check whether LC_MESSAGES is available in <locale.h>.
1835 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1837 # This file file be copied and used freely without restrictions. It can
1838 # be used in projects which are not available under the GNU Public License
1839 # but which still want to provide support for the GNU gettext functionality.
1840 # Please note that the actual code is *not* freely available.
1843 AC_DEFUN([AC_LC_MESSAGES], [
1844 AC_CHECK_HEADER(locale.h, [
1845 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1846 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1847 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1848 if test $ac_cv_val_LC_MESSAGES = yes; then
1849 AC_DEFINE(HAVE_LC_MESSAGES, 1,
1850 [Define if LC_MESSAGES is available in <locale.h>.])
1856 dnl vim:et:ts=2:sw=2