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"$ac_has_complex_h" = x"yes"; then
811 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
812 AC_TRY_COMPILE([#include <complex.h>],
813 [typedef __complex__ float float_type; float_type tmpf;
825 typedef __complex__ double double_type; double_type tmpd;
837 typedef __complex__ long double ld_type; ld_type tmpld;
849 ],[ac_c99_complex=yes], [ac_c99_complex=no])
851 CXXFLAGS="$save_CXXFLAGS"
852 AC_MSG_RESULT($ac_c99_complex)
853 if test x"$ac_c99_complex" = x"yes"; then
854 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
855 [Define if C99 functions in <complex.h> should be used in
856 <complex>. Using compiler builtins for these functions requires
857 corresponding C99 library functions to be present.])
860 # Check for the existence in <stdio.h> of vscanf, et. al.
861 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
862 AC_CACHE_VAL(ac_c99_stdio, [
863 AC_TRY_COMPILE([#include <stdio.h>
865 void foo(char* fmt, ...)
867 va_list args; va_start(args, fmt);
868 vfscanf(stderr, "%i", args);
870 vsnprintf(fmt, 0, "%i", args);
871 vsscanf(fmt, "%i", args);
873 [snprintf("12", 0, "%i");],
874 [ac_c99_stdio=yes], [ac_c99_stdio=no])
876 AC_MSG_RESULT($ac_c99_stdio)
878 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
879 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
880 AC_CACHE_VAL(ac_c99_stdlib, [
881 AC_TRY_COMPILE([#include <stdlib.h>],
884 strtold("gnu", &tmp);
889 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
891 AC_MSG_RESULT($ac_c99_stdlib)
893 # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
894 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
896 if test x"$ac_has_wchar_h" = xyes &&
897 test x"$ac_has_wctype_h" = xyes; then
898 AC_TRY_COMPILE([#include <wchar.h>
962 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
964 # Checks for wide character functions that may not be present.
965 # Injection of these is wrapped with guard macros.
966 # NB: only put functions here, instead of immediately above, if
967 # absolutely necessary.
968 AC_TRY_COMPILE([#include <wchar.h>
969 namespace test { using ::vfwscanf; } ], [],
970 [AC_DEFINE(HAVE_VFWSCANF,1,
971 [Defined if vfwscanf exists.])],[])
973 AC_TRY_COMPILE([#include <wchar.h>
974 namespace test { using ::vswscanf; } ], [],
975 [AC_DEFINE(HAVE_VSWSCANF,1,
976 [Defined if vswscanf exists.])],[])
978 AC_TRY_COMPILE([#include <wchar.h>
979 namespace test { using ::vwscanf; } ], [],
980 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
982 AC_TRY_COMPILE([#include <wchar.h>
983 namespace test { using ::wcstof; } ], [],
984 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
986 AC_TRY_COMPILE([#include <wctype.h>],
987 [ wint_t t; int i = iswblank(t);],
988 [AC_DEFINE(HAVE_ISWBLANK,1,
989 [Defined if iswblank exists.])],[])
991 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
992 AC_MSG_RESULT($ac_c99_wchar)
995 # Option parsed, now set things appropriately.
996 if test x"$ac_c99_math" = x"no" ||
997 test x"$ac_c99_complex" = x"no" ||
998 test x"$ac_c99_stdio" = x"no" ||
999 test x"$ac_c99_stdlib" = x"no" ||
1000 test x"$ac_c99_wchar" = x"no"; then
1003 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1004 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1005 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1011 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1012 AC_MSG_RESULT($enable_c99)
1017 dnl Check for what type of C headers to use.
1019 dnl --enable-cheaders= [does stuff].
1020 dnl --disable-cheaders [does not do anything, really].
1021 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1022 dnl Where DEFAULT is either `c' or `c_std'.
1024 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1025 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1026 [construct "C" headers for g++], [permit c|c_std])
1027 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1029 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1031 AC_SUBST(C_INCLUDE_DIR)
1032 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1033 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1034 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1039 dnl Check for which locale library to use. The choice is mapped to
1040 dnl a subdirectory of config/locale.
1042 dnl Default is generic.
1044 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1045 AC_MSG_CHECKING([for C locale to use])
1046 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1047 [use MODEL for target locale package],
1048 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1050 # If they didn't use this option switch, or if they specified --enable
1051 # with no specific model, we'll have to look for one. If they
1052 # specified --disable (???), do likewise.
1053 if test $enable_clocale = no || test $enable_clocale = yes; then
1057 # Either a known package, or "auto"
1058 enable_clocale_flag=$enable_clocale
1060 # Probe for locale support if no specific model is specified.
1061 # Default to "generic".
1062 if test $enable_clocale_flag = auto; then
1063 case ${target_os} in
1064 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1065 AC_EGREP_CPP([_GLIBCXX_ok], [
1066 #include <features.h>
1067 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1070 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1072 # Test for bugs early in glibc-2.2.x series
1073 if test $enable_clocale_flag = gnu; then
1075 #define _GNU_SOURCE 1
1078 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1079 extern __typeof(newlocale) __newlocale;
1080 extern __typeof(duplocale) __duplocale;
1081 extern __typeof(strcoll_l) __strcoll_l;
1085 const char __one[] = "Äuglein Augmen";
1086 const char __two[] = "Äuglein";
1091 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1092 loc_dup = __duplocale(loc);
1093 i = __strcoll_l(__one, __two, loc);
1094 j = __strcoll_l(__one, __two, loc_dup);
1098 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1099 [enable_clocale_flag=generic])
1102 # ... at some point put __strxfrm_l tests in as well.
1105 enable_clocale_flag=darwin
1108 enable_clocale_flag=generic
1113 # Deal with gettext issues. Default to not using it (=no) until we detect
1114 # support for it later. Let the user turn it off via --e/d, but let that
1115 # default to on for easier handling.
1118 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1122 # Set configure bits for specified locale package
1123 case ${enable_clocale_flag} in
1125 AC_MSG_RESULT(generic)
1127 CLOCALE_H=config/locale/generic/c_locale.h
1128 CLOCALE_CC=config/locale/generic/c_locale.cc
1129 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1130 CCOLLATE_CC=config/locale/generic/collate_members.cc
1131 CCTYPE_CC=config/locale/generic/ctype_members.cc
1132 CMESSAGES_H=config/locale/generic/messages_members.h
1133 CMESSAGES_CC=config/locale/generic/messages_members.cc
1134 CMONEY_CC=config/locale/generic/monetary_members.cc
1135 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1136 CTIME_H=config/locale/generic/time_members.h
1137 CTIME_CC=config/locale/generic/time_members.cc
1138 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1141 AC_MSG_RESULT(darwin or freebsd)
1143 CLOCALE_H=config/locale/generic/c_locale.h
1144 CLOCALE_CC=config/locale/generic/c_locale.cc
1145 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1146 CCOLLATE_CC=config/locale/generic/collate_members.cc
1147 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1148 CMESSAGES_H=config/locale/generic/messages_members.h
1149 CMESSAGES_CC=config/locale/generic/messages_members.cc
1150 CMONEY_CC=config/locale/generic/monetary_members.cc
1151 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1152 CTIME_H=config/locale/generic/time_members.h
1153 CTIME_CC=config/locale/generic/time_members.cc
1154 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1160 # Declare intention to use gettext, and add support for specific
1162 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1165 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1166 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1167 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1170 # Export the build objects.
1171 for ling in $ALL_LINGUAS; do \
1172 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1173 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1175 AC_SUBST(glibcxx_MOFILES)
1176 AC_SUBST(glibcxx_POFILES)
1178 CLOCALE_H=config/locale/gnu/c_locale.h
1179 CLOCALE_CC=config/locale/gnu/c_locale.cc
1180 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1181 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1182 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1183 CMESSAGES_H=config/locale/gnu/messages_members.h
1184 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1185 CMONEY_CC=config/locale/gnu/monetary_members.cc
1186 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1187 CTIME_H=config/locale/gnu/time_members.h
1188 CTIME_CC=config/locale/gnu/time_members.cc
1189 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1192 AC_MSG_RESULT(IEEE 1003.1)
1194 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1195 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1196 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1197 CCOLLATE_CC=config/locale/generic/collate_members.cc
1198 CCTYPE_CC=config/locale/generic/ctype_members.cc
1199 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1200 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1201 CMONEY_CC=config/locale/generic/monetary_members.cc
1202 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1203 CTIME_H=config/locale/generic/time_members.h
1204 CTIME_CC=config/locale/generic/time_members.cc
1205 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1209 # This is where the testsuite looks for locale catalogs, using the
1210 # -DLOCALEDIR define during testsuite compilation.
1211 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1212 AC_SUBST(glibcxx_localedir)
1214 # A standalone libintl (e.g., GNU libintl) may be in use.
1215 if test $USE_NLS = yes; then
1216 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1217 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1219 if test $USE_NLS = yes; then
1220 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1221 [Define if NLS translations are to be used.])
1226 AC_SUBST(CMESSAGES_H)
1227 AC_SUBST(CCODECVT_CC)
1228 AC_SUBST(CCOLLATE_CC)
1230 AC_SUBST(CMESSAGES_CC)
1232 AC_SUBST(CNUMERIC_CC)
1235 AC_SUBST(CLOCALE_CC)
1236 AC_SUBST(CLOCALE_INTERNAL_H)
1241 dnl Check for which std::allocator base class to use. The choice is
1242 dnl mapped from a subdirectory of include/ext.
1246 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1247 AC_MSG_CHECKING([for std::allocator base class])
1248 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1249 [use KIND for target std::allocator base],
1250 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1252 # If they didn't use this option switch, or if they specified --enable
1253 # with no specific model, we'll have to look for one. If they
1254 # specified --disable (???), do likewise.
1255 if test $enable_libstdcxx_allocator = no ||
1256 test $enable_libstdcxx_allocator = yes;
1258 enable_libstdcxx_allocator=auto
1261 # Either a known package, or "auto". Auto implies the default choice
1262 # for a particular platform.
1263 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1265 # Probe for host-specific support if no specific model is specified.
1267 if test $enable_libstdcxx_allocator_flag = auto; then
1268 case ${target_os} in
1269 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1270 enable_libstdcxx_allocator_flag=mt
1273 enable_libstdcxx_allocator_flag=new
1277 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1280 # Set configure bits for specified locale package
1281 case ${enable_libstdcxx_allocator_flag} in
1283 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1284 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1287 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1288 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1291 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1292 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1295 ALLOCATOR_H=config/allocator/new_allocator_base.h
1296 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1299 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1300 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1304 AC_SUBST(ALLOCATOR_H)
1305 AC_SUBST(ALLOCATOR_NAME)
1310 dnl Check for whether the Boost-derived checks should be turned on.
1312 dnl --enable-concept-checks turns them on.
1313 dnl --disable-concept-checks leaves them off.
1314 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1315 dnl Where DEFAULT is either `yes' or `no'.
1317 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1318 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1319 if test $enable_concept_checks = yes; then
1320 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1321 [Define to use concept checking code from the boost libraries.])
1327 dnl Check for which I/O library to use: stdio, or something specific.
1329 dnl Default is stdio.
1331 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1332 AC_MSG_CHECKING([for underlying I/O to use])
1333 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1334 [use target-specific I/O package], [permit stdio])
1336 # Now that libio has been removed, you can have any color you want as long
1337 # as it's black. This is one big no-op until other packages are added, but
1338 # showing the framework never hurts.
1339 case ${enable_cstdio} in
1341 CSTDIO_H=config/io/c_io_stdio.h
1342 BASIC_FILE_H=config/io/basic_file_stdio.h
1343 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1344 AC_MSG_RESULT(stdio)
1349 AC_SUBST(BASIC_FILE_H)
1350 AC_SUBST(BASIC_FILE_CC)
1355 dnl Check for "unusual" flags to pass to the compiler while building.
1357 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1358 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1359 dnl --disable-cxx-flags passes nothing.
1360 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1361 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1362 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1363 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1364 dnl If "default flags" is an empty string, the effect is the same
1365 dnl as --disable or --enable=no.
1367 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1368 AC_MSG_CHECKING([for extra compiler flags for building])
1369 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1370 [pass compiler FLAGS when building library],
1371 [case "x$enable_cxx_flags" in
1372 xno | x) enable_cxx_flags= ;;
1374 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1377 # Run through flags (either default or command-line) and set anything
1378 # extra (e.g., #defines) that must accompany particular g++ options.
1379 if test -n "$enable_cxx_flags"; then
1380 for f in $enable_cxx_flags; do
1384 *) # and we're trying to pass /what/ exactly?
1385 AC_MSG_ERROR([compiler flags start with a -]) ;;
1390 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1391 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1392 AC_SUBST(EXTRA_CXX_FLAGS)
1397 dnl Check to see if debugging libraries are to be built.
1399 dnl --enable-libstdcxx-debug
1400 dnl builds a separate set of debugging libraries in addition to the
1401 dnl normal (shared, static) libstdc++ binaries.
1403 dnl --disable-libstdcxx-debug
1404 dnl builds only one (non-debug) version of libstdc++.
1406 dnl --enable-libstdcxx-debug-flags=FLAGS
1407 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1409 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1410 dnl Where DEFAULT is either `yes' or `no'.
1412 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1413 AC_MSG_CHECKING([for additional debug build])
1414 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1415 AC_MSG_RESULT($enable_libstdcxx_debug)
1416 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1421 dnl Check for explicit debug flags.
1423 dnl --enable-libstdcxx-debug-flags='-O1'
1424 dnl is a general method for passing flags to be used when
1425 dnl building debug libraries with --enable-debug.
1427 dnl --disable-libstdcxx-debug-flags does nothing.
1428 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1429 dnl If "default flags" is an empty string, the effect is the same
1430 dnl as --disable or --enable=no.
1432 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1433 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1434 [pass compiler FLAGS when building debug library],
1435 [case "x$enable_libstdcxx_debug_flags" in
1436 xno | x) enable_libstdcxx_debug_flags= ;;
1438 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1441 # Option parsed, now set things appropriately
1442 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1443 AC_SUBST(DEBUG_FLAGS)
1445 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1450 dnl Check if the user only wants a freestanding library implementation.
1452 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1453 dnl installing only the headers required by [17.4.1.3] and the language
1454 dnl support library. More than that will be built (to keep the Makefiles
1455 dnl conveniently clean), but not installed.
1458 dnl is_hosted (yes/no)
1461 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1463 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1464 AC_ARG_ENABLE([hosted-libstdcxx],
1465 AC_HELP_STRING([--disable-hosted-libstdcxx],
1466 [only build freestanding C++ runtime support]),,
1469 enable_hosted_libstdcxx=no
1472 enable_hosted_libstdcxx=yes
1475 if test "$enable_hosted_libstdcxx" = no; then
1476 AC_MSG_NOTICE([Only freestanding libraries will be built])
1480 enable_libstdcxx_pch=no
1485 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1486 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1487 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1492 dnl Check for template specializations for the 'long long' type.
1493 dnl The result determines only whether 'long long' I/O is enabled; things
1494 dnl like numeric_limits<> specializations are always available.
1496 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1497 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1498 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1499 dnl Where DEFAULT is either `yes' or `no'.
1501 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1502 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1503 if test $enable_long_long = yes; then
1504 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1505 [Define if code specialized for long long should be used.])
1507 AC_MSG_CHECKING([for enabled long long specializations])
1508 AC_MSG_RESULT([$enable_long_long])
1513 dnl Check for template specializations for the 'wchar_t' type.
1515 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1516 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1517 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1518 dnl Where DEFAULT is either `yes' or `no'.
1520 dnl Necessary support (probed along with C99 support) must also be present.
1522 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1523 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1524 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1525 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1526 [Define if code specialized for wchar_t should be used.])
1528 AC_MSG_CHECKING([for enabled wchar_t specializations])
1529 AC_MSG_RESULT([$enable_wchar_t])
1534 dnl Check to see if building and using a C++ precompiled header can be done.
1536 dnl --enable-libstdcxx-pch=yes
1537 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1538 dnl may work, after some light-hearted attempts to puzzle out compiler
1539 dnl support, flip bits on in include/Makefile.am
1541 dnl --disable-libstdcxx-pch
1542 dnl turns off attempts to use or build stdc++.h.gch.
1545 dnl glibcxx_PCHFLAGS
1547 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1548 AC_MSG_CHECKING([for enabled PCH])
1549 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1550 AC_MSG_RESULT([$enable_libstdcxx_pch])
1552 if test $enable_libstdcxx_pch = yes; then
1553 AC_CACHE_CHECK([for compiler with PCH support],
1554 [glibcxx_cv_prog_CXX_pch],
1555 [ac_save_CXXFLAGS="$CXXFLAGS"
1556 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1559 echo '#include <math.h>' > conftest.h
1560 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1561 -o conftest.h.gch 1>&5 2>&1 &&
1562 echo '#error "pch failed"' > conftest.h &&
1563 echo '#include "conftest.h"' > conftest.cc &&
1564 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1566 glibcxx_cv_prog_CXX_pch=yes
1568 glibcxx_cv_prog_CXX_pch=no
1571 CXXFLAGS=$ac_save_CXXFLAGS
1574 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1577 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1578 if test $enable_libstdcxx_pch = yes; then
1579 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1583 AC_SUBST(glibcxx_PCHFLAGS)
1588 dnl Check for exception handling support. If an explicit enable/disable
1589 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1590 dnl target may or may not support call frame exceptions.
1592 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1593 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1594 dnl Neither one forces an attempt at detection.
1597 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1599 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1600 AC_MSG_CHECKING([for exception model to use])
1603 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1604 [force use of builtin_setjmp for exceptions],
1605 [permit yes|no|auto])
1607 if test $enable_sjlj_exceptions = auto; then
1608 # Botheration. Now we've got to detect the exception model. Link tests
1609 # against libgcc.a are problematic since we've not been given proper -L
1610 # bits for single-tree newlib and libgloss.
1612 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1613 cat > conftest.$ac_ext << EOF
1614 [#]line __oline__ "configure"
1623 old_CXXFLAGS="$CXXFLAGS"
1625 if AC_TRY_EVAL(ac_compile); then
1626 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1627 enable_sjlj_exceptions=yes
1628 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1629 enable_sjlj_exceptions=no
1632 CXXFLAGS="$old_CXXFLAGS"
1636 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1637 # to two different models.
1638 case $enable_sjlj_exceptions in
1640 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1641 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1642 ac_exception_model_name=sjlj
1645 ac_exception_model_name="call frame"
1648 AC_MSG_ERROR([unable to detect exception model])
1652 AC_MSG_RESULT($ac_exception_model_name)
1657 dnl Add version tags to symbols in shared library (or not), additionally
1658 dnl marking other symbols as private/local (or not).
1660 dnl --enable-symvers=style adds a version script to the linker call when
1661 dnl creating the shared library. The choice of version script is
1662 dnl controlled by 'style'.
1663 dnl --disable-symvers does not.
1664 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1665 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1666 dnl choose a default style based on linker characteristics. Passing
1667 dnl 'no' disables versioning.
1669 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1671 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1672 [enables symbol versioning of the shared library],
1673 [permit yes|no|gnu])
1675 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1676 # don't know enough about $LD to do tricks...
1677 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1678 # FIXME The following test is too strict, in theory.
1679 if test $enable_shared = no ||
1681 test x$glibcxx_gnu_ld_version = x; then
1685 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1686 if test $enable_symvers != no; then
1687 AC_MSG_CHECKING([for shared libgcc])
1688 ac_save_CFLAGS="$CFLAGS"
1690 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1691 CFLAGS="$ac_save_CFLAGS"
1692 if test $glibcxx_shared_libgcc = no; then
1693 cat > conftest.c <<EOF
1694 int main (void) { return 0; }
1697 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1698 -shared -shared-libgcc -o conftest.so \
1699 conftest.c -v 2>&1 >/dev/null \
1700 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1702 rm -f conftest.c conftest.so
1703 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1704 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1705 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1706 CFLAGS="$ac_save_CFLAGS"
1709 AC_MSG_RESULT($glibcxx_shared_libgcc)
1712 # For GNU ld, we need at least this version. The format is described in
1713 # GLIBCXX_CHECK_LINKER_FEATURES above.
1714 glibcxx_min_gnu_ld_version=21400
1715 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1717 # Check to see if unspecified "yes" value can win, given results above.
1718 # Change "yes" into either "no" or a style name.
1719 if test $enable_symvers = yes; then
1720 if test $with_gnu_ld = yes &&
1721 test $glibcxx_shared_libgcc = yes;
1723 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1726 # The right tools, the right setup, but too old. Fallbacks?
1727 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1728 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1729 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1730 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1731 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1732 # Globbing fix is present, proper block support is not.
1733 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1734 dnl enable_symvers=???
1735 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1739 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1745 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1746 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1747 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1748 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1753 # Everything parsed; figure out what file to use.
1754 case $enable_symvers in
1756 SYMVER_MAP=config/linker-map.dummy
1759 SYMVER_MAP=config/linker-map.gnu
1760 AC_DEFINE(_GLIBCXX_SYMVER, 1,
1761 [Define to use symbol versioning in the shared library.])
1765 AH_VERBATIM([_GLIBCXX_SYMVERextra],
1766 [/* Define symbol versioning in assember directives. If symbol
1767 versioning is being used, and the assembler supports this kind of
1770 NB: _GLIBCXX_AT_AT is a hack to work around quoting issues in m4. */
1773 #define _GLIBCXX_ASM_SYMVER(cur, old, version) \
1774 asm (".symver " #cur "," #old _GLIBCXX_AT_AT #version);
1776 #define _GLIBCXX_ASM_SYMVER(cur, old, version)
1779 AC_SUBST(SYMVER_MAP)
1780 AC_SUBST(port_specific_symbol_files)
1781 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1782 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1787 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1788 dnl We must stage the required headers so that they will be installed
1789 dnl with the library (unlike libgcc, the STL implementation is provided
1790 dnl solely within headers). Since we must not inject random user-space
1791 dnl macro names into user-provided C++ code, we first stage into <file>-in
1792 dnl and process to <file> with an output command. The reason for a two-
1793 dnl stage process here is to correctly handle $srcdir!=$objdir without
1794 dnl having to write complex code (the sed commands to clean the macro
1795 dnl namespace are complex and fragile enough as it is). We must also
1796 dnl add a relative path so that -I- is supported properly.
1799 dnl glibcxx_thread_h
1802 dnl HAVE_GTHR_DEFAULT
1804 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1805 AC_MSG_CHECKING([for thread model used by GCC])
1806 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1807 AC_MSG_RESULT([$target_thread_file])
1809 if test $target_thread_file != single; then
1810 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
1811 [Define if gthr-default.h exists
1812 (meaning that threading support is enabled).])
1815 glibcxx_thread_h=gthr-$target_thread_file.h
1817 dnl Check for __GTHREADS define.
1818 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1819 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1825 AC_SUBST(glibcxx_thread_h)
1829 # Check whether LC_MESSAGES is available in <locale.h>.
1830 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1832 # This file file be copied and used freely without restrictions. It can
1833 # be used in projects which are not available under the GNU Public License
1834 # but which still want to provide support for the GNU gettext functionality.
1835 # Please note that the actual code is *not* freely available.
1838 AC_DEFUN([AC_LC_MESSAGES], [
1839 AC_CHECK_HEADER(locale.h, [
1840 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1841 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1842 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1843 if test $ac_cv_val_LC_MESSAGES = yes; then
1844 AC_DEFINE(HAVE_LC_MESSAGES, 1,
1845 [Define if LC_MESSAGES is available in <locale.h>.])
1851 dnl vim:et:ts=2:sw=2