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], [
336 AC_MSG_CHECKING([for RLIMIT_$1])
339 #include <sys/time.h>
340 #include <sys/resource.h>
342 [ int f = RLIMIT_$1 ; ],
343 [glibcxx_mresult=1], [glibcxx_mresult=0])
344 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
345 [Only used in build directory testsuite_hooks.h.])
346 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
350 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
351 setrlimit_have_headers=yes
352 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
354 [setrlimit_have_headers=no])
355 # If don't have the headers, then we can't run the tests now, and we
356 # won't be seeing any of these during testsuite compilation.
357 if test $setrlimit_have_headers = yes; then
358 # Can't do these in a loop, else the resulting syntax is wrong.
359 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
360 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
361 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
362 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
363 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
365 # Check for rlimit, setrlimit.
366 AC_CACHE_VAL(ac_setrlimit, [
369 #include <sys/time.h>
370 #include <sys/resource.h>
374 [ac_setrlimit=yes], [ac_setrlimit=no])
378 AC_MSG_CHECKING([for testsuite resource limits support])
379 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
381 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
382 [Define if using setrlimit to set resource limits during
387 AC_MSG_RESULT($ac_res_limits)
392 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
393 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
395 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
396 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
397 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
399 [#include <sys/stat.h>],
402 S_ISREG(buffer.st_mode);],
403 [glibcxx_cv_S_ISREG=yes],
404 [glibcxx_cv_S_ISREG=no])
406 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
408 [#include <sys/stat.h>],
411 S_IFREG & buffer.st_mode;],
412 [glibcxx_cv_S_IFREG=yes],
413 [glibcxx_cv_S_IFREG=no])
416 if test $glibcxx_cv_S_ISREG = yes; then
417 AC_DEFINE(HAVE_S_ISREG, 1,
418 [Define if S_IFREG is available in <sys/stat.h>.])
420 elif test $glibcxx_cv_S_IFREG = yes; then
421 AC_DEFINE(HAVE_S_IFREG, 1,
422 [Define if S_IFREG is available in <sys/stat.h>.])
430 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
432 AC_DEFUN([GLIBCXX_CHECK_POLL], [
433 AC_MSG_CHECKING([for poll])
434 AC_CACHE_VAL(glibcxx_cv_POLL, [
437 [struct pollfd pfd[1];
438 pfd[0].events = POLLIN;
440 [glibcxx_cv_POLL=yes],
441 [glibcxx_cv_POLL=no])
443 if test $glibcxx_cv_POLL = yes; then
444 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
446 AC_MSG_RESULT($glibcxx_cv_POLL)
451 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
453 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
454 AC_MSG_CHECKING([for writev])
455 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
457 [#include <sys/uio.h>],
458 [struct iovec iov[2];
460 [glibcxx_cv_WRITEV=yes],
461 [glibcxx_cv_WRITEV=no])
463 if test $glibcxx_cv_WRITEV = yes; then
464 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
466 AC_MSG_RESULT($glibcxx_cv_WRITEV)
471 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
473 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
474 AC_MSG_CHECKING([for int64_t])
475 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
477 [#include <stdint.h>],
479 [glibcxx_cv_INT64_T=yes],
480 [glibcxx_cv_INT64_T=no])
482 if test $glibcxx_cv_INT64_T = yes; then
483 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
485 AC_MSG_RESULT($glibcxx_cv_INT64_T)
490 dnl Check whether LFS support is available.
492 AC_DEFUN([GLIBCXX_CHECK_LFS], [
495 ac_save_CXXFLAGS="$CXXFLAGS"
496 CXXFLAGS="$CXXFLAGS -fno-exceptions"
497 AC_MSG_CHECKING([for LFS support])
498 AC_CACHE_VAL(glibcxx_cv_LFS, [
502 #include <sys/stat.h>
506 fseeko64(fp, 0, SEEK_CUR);
508 lseek64(1, 0, SEEK_CUR);
511 [glibcxx_cv_LFS=yes],
514 if test $glibcxx_cv_LFS = yes; then
515 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
517 AC_MSG_RESULT($glibcxx_cv_LFS)
518 CXXFLAGS="$ac_save_CXXFLAGS"
524 dnl Check for whether a fully dynamic basic_string implementation should
525 dnl be turned on, that does not put empty objects in per-process static
526 dnl memory (mostly useful together with shared memory allocators, see PR
527 dnl libstdc++/16612 for details).
529 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
530 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
531 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
532 dnl Where DEFAULT is either `yes' or `no'.
534 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
535 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
536 if test $enable_fully_dynamic_string = yes; then
537 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
538 [Define if a fully dynamic basic_string is wanted.])
544 dnl Does any necessary configuration of the testsuite directory. Generates
545 dnl the testsuite_hooks.h header.
547 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
551 dnl GLIBCXX_TEST_WCHAR_T
552 dnl GLIBCXX_TEST_THREAD
556 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
557 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
558 test $enable_symvers != no; then
559 # Do checks for resource limit functions.
560 GLIBCXX_CHECK_SETRLIMIT
562 # Look for setenv, so that extended locale tests can be performed.
563 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
565 if test $enable_symvers = no; then
570 enable_abi_check=no ;;
572 enable_abi_check=yes ;;
576 # Only build this as native, since automake does not understand
581 # Export file names for ABI checking.
582 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
583 AC_SUBST(baseline_dir)
588 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
592 dnl TOPLEVEL_INCLUDES
594 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
595 # Used for every C++ compile we perform.
597 -I$glibcxx_builddir/include/$host_alias \
598 -I$glibcxx_builddir/include \
599 -I$glibcxx_srcdir/libsupc++"
601 # For Canadian crosses, pick this up too.
602 if test $CANADIAN = yes; then
603 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
606 # Stuff in the actual top level. Currently only used by libsupc++ to
607 # get unwind* headers from the gcc dir.
608 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
609 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
611 # Now, export this to all the little Makefiles....
612 AC_SUBST(GLIBCXX_INCLUDES)
613 AC_SUBST(TOPLEVEL_INCLUDES)
618 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
619 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
622 dnl OPTIMIZE_CXXFLAGS
625 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
626 # Optimization flags that are probably a good idea for thrill-seekers. Just
627 # uncomment the lines below and make, everything else is ready to go...
628 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
630 AC_SUBST(OPTIMIZE_CXXFLAGS)
632 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
638 dnl All installation directory information is determined here.
642 dnl glibcxx_prefixdir
643 dnl glibcxx_toolexecdir
644 dnl glibcxx_toolexeclibdir
646 dnl Assumes cross_compiling bits already done, and with_cross_host in
649 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
650 glibcxx_toolexecdir=no
651 glibcxx_toolexeclibdir=no
652 glibcxx_prefixdir=$prefix
654 AC_MSG_CHECKING([for gxx-include-dir])
655 AC_ARG_WITH([gxx-include-dir],
656 AC_HELP_STRING([--with-gxx-include-dir=DIR],
657 [installation directory for include files]),
659 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
660 no) gxx_include_dir=no ;;
661 *) gxx_include_dir=$withval ;;
663 [gxx_include_dir=no])
664 AC_MSG_RESULT($gxx_include_dir)
666 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
667 AC_ARG_ENABLE([version-specific-runtime-libs],
668 AC_HELP_STRING([--enable-version-specific-runtime-libs],
669 [Specify that runtime libraries should be installed in a compiler-specific directory]),
670 [case "$enableval" in
671 yes) version_specific_libs=yes ;;
672 no) version_specific_libs=no ;;
673 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
675 [version_specific_libs=no])
676 AC_MSG_RESULT($version_specific_libs)
678 # Default case for install directory for include files.
679 if test $version_specific_libs = no && test $gxx_include_dir = no; then
680 gxx_include_dir='${prefix}/include/c++/${gcc_version}'
683 # Version-specific runtime libs processing.
684 if test $version_specific_libs = yes; then
685 # Need the gcc compiler version to know where to install libraries
686 # and header files if --enable-version-specific-runtime-libs option
687 # is selected. FIXME: these variables are misnamed, there are
688 # no executables installed in _toolexecdir or _toolexeclibdir.
689 if test x"$gxx_include_dir" = x"no"; then
690 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
692 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
693 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
696 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
697 # Install a library built with a cross compiler in tooldir, not libdir.
698 if test x"$glibcxx_toolexecdir" = x"no"; then
699 if test -n "$with_cross_host" &&
700 test x"$with_cross_host" != x"no"; then
701 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
702 glibcxx_toolexeclibdir='${toolexecdir}/lib'
704 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
705 glibcxx_toolexeclibdir='${libdir}'
707 multi_os_directory=`$CXX -print-multi-os-directory`
708 case $multi_os_directory in
709 .) ;; # Avoid trailing /.
710 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
714 AC_MSG_CHECKING([for install location])
715 AC_MSG_RESULT($gxx_include_dir)
717 AC_SUBST(glibcxx_prefixdir)
718 AC_SUBST(gxx_include_dir)
719 AC_SUBST(glibcxx_toolexecdir)
720 AC_SUBST(glibcxx_toolexeclibdir)
726 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
727 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
728 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
730 dnl See docs/html/17_intro/configury.html#enable for documentation.
732 m4_define([GLIBCXX_ENABLE],[dnl
733 m4_define([_g_switch],[--enable-$1])dnl
734 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
735 AC_ARG_ENABLE($1,_g_help,
740 m4_bpatsubst([$5],[permit ])) ;;
741 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
742 dnl Idea for future: generate a URL pointing to
743 dnl "onlinedocs/configopts.html#whatever"
750 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
754 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
755 m4_undefine([_g_switch])dnl
756 m4_undefine([_g_help])dnl
761 dnl Check for ISO/IEC 9899:1999 "C99" support.
763 dnl --enable-c99 defines _GLIBCXX_USE_C99
764 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
765 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
766 dnl Where DEFAULT is either `yes' or `no'.
767 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
769 AC_DEFUN([GLIBCXX_ENABLE_C99], [
770 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
772 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos
773 # even if C99 support is turned off.
774 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
775 AC_MSG_CHECKING([for mbstate_t])
776 AC_TRY_COMPILE([#include <wchar.h>],
777 [mbstate_t teststate;],
778 have_mbstate_t=yes, have_mbstate_t=no)
779 AC_MSG_RESULT($have_mbstate_t)
780 if test x"$have_mbstate_t" = xyes; then
781 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
784 if test x"$enable_c99" = x"yes"; then
789 # Check for the existence of <math.h> functions used if C99 is enabled.
790 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
791 AC_CACHE_VAL(ac_c99_math, [
792 AC_TRY_COMPILE([#include <math.h>],
800 isgreaterequal(0.0,0.0);
802 islessequal(0.0,0.0);
803 islessgreater(0.0,0.0);
804 islessgreater(0.0,0.0);
805 isunordered(0.0,0.0);
806 ],[ac_c99_math=yes], [ac_c99_math=no])
808 AC_MSG_RESULT($ac_c99_math)
809 if test x"$ac_c99_math" = x"yes"; then
810 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
811 [Define if C99 functions or macros in <math.h> should be imported
812 in <cmath> in namespace std.])
815 # Check for the existence of <complex.h> complex math functions.
816 # This is necessary even though libstdc++ uses the builtin versions
817 # of these functions, because if the builtin cannot be used, a reference
818 # to the library function is emitted.
819 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
821 if test x"$ac_has_complex_h" = x"yes"; then
822 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
823 AC_TRY_COMPILE([#include <complex.h>],
824 [typedef __complex__ float float_type; float_type tmpf;
837 typedef __complex__ double double_type; double_type tmpd;
850 typedef __complex__ long double ld_type; ld_type tmpld;
863 ],[ac_c99_complex=yes], [ac_c99_complex=no])
865 AC_MSG_RESULT($ac_c99_complex)
866 if test x"$ac_c99_complex" = x"yes"; then
867 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
868 [Define if C99 functions in <complex.h> should be used in
869 <complex>. Using compiler builtins for these functions requires
870 corresponding C99 library functions to be present.])
873 # Check for the existence in <stdio.h> of vscanf, et. al.
874 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
875 AC_CACHE_VAL(ac_c99_stdio, [
876 AC_TRY_COMPILE([#include <stdio.h>
878 void foo(char* fmt, ...)
880 va_list args; va_start(args, fmt);
881 vfscanf(stderr, "%i", args);
883 vsnprintf(fmt, 0, "%i", args);
884 vsscanf(fmt, "%i", args);
886 [snprintf("12", 0, "%i");],
887 [ac_c99_stdio=yes], [ac_c99_stdio=no])
889 AC_MSG_RESULT($ac_c99_stdio)
891 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
892 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
893 AC_CACHE_VAL(ac_c99_stdlib, [
894 AC_TRY_COMPILE([#include <stdlib.h>],
897 strtold("gnu", &tmp);
898 strtoll("gnu", &tmp, 10);
899 strtoull("gnu", &tmp, 10);
904 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
906 AC_MSG_RESULT($ac_c99_stdlib)
908 # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
909 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
911 if test x"$ac_has_wchar_h" = xyes &&
912 test x"$ac_has_wctype_h" = xyes; then
913 AC_TRY_COMPILE([#include <wchar.h>
977 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
979 # Checks for wide character functions that may not be present.
980 # Injection of these is wrapped with guard macros.
981 # NB: only put functions here, instead of immediately above, if
982 # absolutely necessary.
983 AC_TRY_COMPILE([#include <wchar.h>
984 namespace test { using ::vfwscanf; } ], [],
985 [AC_DEFINE(HAVE_VFWSCANF,1,
986 [Defined if vfwscanf exists.])],[])
988 AC_TRY_COMPILE([#include <wchar.h>
989 namespace test { using ::vswscanf; } ], [],
990 [AC_DEFINE(HAVE_VSWSCANF,1,
991 [Defined if vswscanf exists.])],[])
993 AC_TRY_COMPILE([#include <wchar.h>
994 namespace test { using ::vwscanf; } ], [],
995 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
997 AC_TRY_COMPILE([#include <wchar.h>
998 namespace test { using ::wcstof; } ], [],
999 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1001 AC_TRY_COMPILE([#include <wctype.h>],
1002 [ wint_t t; int i = iswblank(t);],
1003 [AC_DEFINE(HAVE_ISWBLANK,1,
1004 [Defined if iswblank exists.])],[])
1006 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1007 AC_MSG_RESULT($ac_c99_wchar)
1010 # Option parsed, now set things appropriately.
1011 if test x"$ac_c99_math" = x"no" ||
1012 test x"$ac_c99_complex" = x"no" ||
1013 test x"$ac_c99_stdio" = x"no" ||
1014 test x"$ac_c99_stdlib" = x"no" ||
1015 test x"$ac_c99_wchar" = x"no"; then
1018 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1019 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1020 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1026 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1027 AC_MSG_RESULT($enable_c99)
1032 dnl Check for what type of C headers to use.
1034 dnl --enable-cheaders= [does stuff].
1035 dnl --disable-cheaders [does not do anything, really].
1036 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1037 dnl Where DEFAULT is either `c' or `c_std'.
1039 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1040 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1041 [construct "C" headers for g++], [permit c|c_std])
1042 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1044 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1046 AC_SUBST(C_INCLUDE_DIR)
1047 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1048 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1049 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1054 dnl Check for which locale library to use. The choice is mapped to
1055 dnl a subdirectory of config/locale.
1057 dnl Default is generic.
1059 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1060 AC_MSG_CHECKING([for C locale to use])
1061 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1062 [use MODEL for target locale package],
1063 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1065 # If they didn't use this option switch, or if they specified --enable
1066 # with no specific model, we'll have to look for one. If they
1067 # specified --disable (???), do likewise.
1068 if test $enable_clocale = no || test $enable_clocale = yes; then
1072 # Either a known package, or "auto"
1073 enable_clocale_flag=$enable_clocale
1075 # Probe for locale support if no specific model is specified.
1076 # Default to "generic".
1077 if test $enable_clocale_flag = auto; then
1078 case ${target_os} in
1079 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1080 AC_EGREP_CPP([_GLIBCXX_ok], [
1081 #include <features.h>
1082 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1085 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1087 # Test for bugs early in glibc-2.2.x series
1088 if test $enable_clocale_flag = gnu; then
1090 #define _GNU_SOURCE 1
1093 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1094 extern __typeof(newlocale) __newlocale;
1095 extern __typeof(duplocale) __duplocale;
1096 extern __typeof(strcoll_l) __strcoll_l;
1100 const char __one[] = "Äuglein Augmen";
1101 const char __two[] = "Äuglein";
1106 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1107 loc_dup = __duplocale(loc);
1108 i = __strcoll_l(__one, __two, loc);
1109 j = __strcoll_l(__one, __two, loc_dup);
1113 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1114 [enable_clocale_flag=generic])
1117 # ... at some point put __strxfrm_l tests in as well.
1120 enable_clocale_flag=darwin
1123 enable_clocale_flag=generic
1128 # Deal with gettext issues. Default to not using it (=no) until we detect
1129 # support for it later. Let the user turn it off via --e/d, but let that
1130 # default to on for easier handling.
1133 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1137 # Set configure bits for specified locale package
1138 case ${enable_clocale_flag} in
1140 AC_MSG_RESULT(generic)
1142 CLOCALE_H=config/locale/generic/c_locale.h
1143 CLOCALE_CC=config/locale/generic/c_locale.cc
1144 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1145 CCOLLATE_CC=config/locale/generic/collate_members.cc
1146 CCTYPE_CC=config/locale/generic/ctype_members.cc
1147 CMESSAGES_H=config/locale/generic/messages_members.h
1148 CMESSAGES_CC=config/locale/generic/messages_members.cc
1149 CMONEY_CC=config/locale/generic/monetary_members.cc
1150 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1151 CTIME_H=config/locale/generic/time_members.h
1152 CTIME_CC=config/locale/generic/time_members.cc
1153 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1156 AC_MSG_RESULT(darwin or freebsd)
1158 CLOCALE_H=config/locale/generic/c_locale.h
1159 CLOCALE_CC=config/locale/generic/c_locale.cc
1160 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1161 CCOLLATE_CC=config/locale/generic/collate_members.cc
1162 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1163 CMESSAGES_H=config/locale/generic/messages_members.h
1164 CMESSAGES_CC=config/locale/generic/messages_members.cc
1165 CMONEY_CC=config/locale/generic/monetary_members.cc
1166 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1167 CTIME_H=config/locale/generic/time_members.h
1168 CTIME_CC=config/locale/generic/time_members.cc
1169 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1175 # Declare intention to use gettext, and add support for specific
1177 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1180 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1181 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1182 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1185 # Export the build objects.
1186 for ling in $ALL_LINGUAS; do \
1187 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1188 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1190 AC_SUBST(glibcxx_MOFILES)
1191 AC_SUBST(glibcxx_POFILES)
1193 CLOCALE_H=config/locale/gnu/c_locale.h
1194 CLOCALE_CC=config/locale/gnu/c_locale.cc
1195 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1196 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1197 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1198 CMESSAGES_H=config/locale/gnu/messages_members.h
1199 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1200 CMONEY_CC=config/locale/gnu/monetary_members.cc
1201 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1202 CTIME_H=config/locale/gnu/time_members.h
1203 CTIME_CC=config/locale/gnu/time_members.cc
1204 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1207 AC_MSG_RESULT(IEEE 1003.1)
1209 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1210 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1211 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1212 CCOLLATE_CC=config/locale/generic/collate_members.cc
1213 CCTYPE_CC=config/locale/generic/ctype_members.cc
1214 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1215 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1216 CMONEY_CC=config/locale/generic/monetary_members.cc
1217 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1218 CTIME_H=config/locale/generic/time_members.h
1219 CTIME_CC=config/locale/generic/time_members.cc
1220 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1224 # This is where the testsuite looks for locale catalogs, using the
1225 # -DLOCALEDIR define during testsuite compilation.
1226 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1227 AC_SUBST(glibcxx_localedir)
1229 # A standalone libintl (e.g., GNU libintl) may be in use.
1230 if test $USE_NLS = yes; then
1231 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1232 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1234 if test $USE_NLS = yes; then
1235 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1236 [Define if NLS translations are to be used.])
1241 AC_SUBST(CMESSAGES_H)
1242 AC_SUBST(CCODECVT_CC)
1243 AC_SUBST(CCOLLATE_CC)
1245 AC_SUBST(CMESSAGES_CC)
1247 AC_SUBST(CNUMERIC_CC)
1250 AC_SUBST(CLOCALE_CC)
1251 AC_SUBST(CLOCALE_INTERNAL_H)
1256 dnl Check for which std::allocator base class to use. The choice is
1257 dnl mapped from a subdirectory of include/ext.
1261 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1262 AC_MSG_CHECKING([for std::allocator base class])
1263 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1264 [use KIND for target std::allocator base],
1265 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1267 # If they didn't use this option switch, or if they specified --enable
1268 # with no specific model, we'll have to look for one. If they
1269 # specified --disable (???), do likewise.
1270 if test $enable_libstdcxx_allocator = no ||
1271 test $enable_libstdcxx_allocator = yes;
1273 enable_libstdcxx_allocator=auto
1276 # Either a known package, or "auto". Auto implies the default choice
1277 # for a particular platform.
1278 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1280 # Probe for host-specific support if no specific model is specified.
1282 if test $enable_libstdcxx_allocator_flag = auto; then
1283 case ${target_os} in
1284 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1285 enable_libstdcxx_allocator_flag=mt
1288 enable_libstdcxx_allocator_flag=new
1292 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1295 # Set configure bits for specified locale package
1296 case ${enable_libstdcxx_allocator_flag} in
1298 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1299 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1302 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1303 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1306 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1307 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1310 ALLOCATOR_H=config/allocator/new_allocator_base.h
1311 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1314 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1315 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1319 AC_SUBST(ALLOCATOR_H)
1320 AC_SUBST(ALLOCATOR_NAME)
1325 dnl Check for whether the Boost-derived checks should be turned on.
1327 dnl --enable-concept-checks turns them on.
1328 dnl --disable-concept-checks leaves them off.
1329 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1330 dnl Where DEFAULT is either `yes' or `no'.
1332 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1333 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1334 if test $enable_concept_checks = yes; then
1335 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1336 [Define to use concept checking code from the boost libraries.])
1342 dnl Check for which I/O library to use: stdio, or something specific.
1344 dnl Default is stdio.
1346 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1347 AC_MSG_CHECKING([for underlying I/O to use])
1348 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1349 [use target-specific I/O package], [permit stdio])
1351 # Now that libio has been removed, you can have any color you want as long
1352 # as it's black. This is one big no-op until other packages are added, but
1353 # showing the framework never hurts.
1354 case ${enable_cstdio} in
1356 CSTDIO_H=config/io/c_io_stdio.h
1357 BASIC_FILE_H=config/io/basic_file_stdio.h
1358 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1359 AC_MSG_RESULT(stdio)
1364 AC_SUBST(BASIC_FILE_H)
1365 AC_SUBST(BASIC_FILE_CC)
1370 dnl Check for "unusual" flags to pass to the compiler while building.
1372 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1373 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1374 dnl --disable-cxx-flags passes nothing.
1375 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1376 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1377 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1378 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1379 dnl If "default flags" is an empty string, the effect is the same
1380 dnl as --disable or --enable=no.
1382 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1383 AC_MSG_CHECKING([for extra compiler flags for building])
1384 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1385 [pass compiler FLAGS when building library],
1386 [case "x$enable_cxx_flags" in
1387 xno | x) enable_cxx_flags= ;;
1389 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1392 # Run through flags (either default or command-line) and set anything
1393 # extra (e.g., #defines) that must accompany particular g++ options.
1394 if test -n "$enable_cxx_flags"; then
1395 for f in $enable_cxx_flags; do
1399 *) # and we're trying to pass /what/ exactly?
1400 AC_MSG_ERROR([compiler flags start with a -]) ;;
1405 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1406 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1407 AC_SUBST(EXTRA_CXX_FLAGS)
1412 dnl Check to see if debugging libraries are to be built.
1414 dnl --enable-libstdcxx-debug
1415 dnl builds a separate set of debugging libraries in addition to the
1416 dnl normal (shared, static) libstdc++ binaries.
1418 dnl --disable-libstdcxx-debug
1419 dnl builds only one (non-debug) version of libstdc++.
1421 dnl --enable-libstdcxx-debug-flags=FLAGS
1422 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1424 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1425 dnl Where DEFAULT is either `yes' or `no'.
1427 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1428 AC_MSG_CHECKING([for additional debug build])
1429 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1430 AC_MSG_RESULT($enable_libstdcxx_debug)
1431 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1436 dnl Check for explicit debug flags.
1438 dnl --enable-libstdcxx-debug-flags='-O1'
1439 dnl is a general method for passing flags to be used when
1440 dnl building debug libraries with --enable-debug.
1442 dnl --disable-libstdcxx-debug-flags does nothing.
1443 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1444 dnl If "default flags" is an empty string, the effect is the same
1445 dnl as --disable or --enable=no.
1447 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1448 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1449 [pass compiler FLAGS when building debug library],
1450 [case "x$enable_libstdcxx_debug_flags" in
1451 xno | x) enable_libstdcxx_debug_flags= ;;
1453 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1456 # Option parsed, now set things appropriately
1457 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1458 AC_SUBST(DEBUG_FLAGS)
1460 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1465 dnl Check if the user only wants a freestanding library implementation.
1467 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1468 dnl installing only the headers required by [17.4.1.3] and the language
1469 dnl support library. More than that will be built (to keep the Makefiles
1470 dnl conveniently clean), but not installed.
1473 dnl is_hosted (yes/no)
1476 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1478 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1479 AC_ARG_ENABLE([hosted-libstdcxx],
1480 AC_HELP_STRING([--disable-hosted-libstdcxx],
1481 [only build freestanding C++ runtime support]),,
1484 enable_hosted_libstdcxx=no
1487 enable_hosted_libstdcxx=yes
1490 if test "$enable_hosted_libstdcxx" = no; then
1491 AC_MSG_NOTICE([Only freestanding libraries will be built])
1495 enable_libstdcxx_pch=no
1500 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1501 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1502 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1507 dnl Check for template specializations for the 'long long' type.
1508 dnl The result determines only whether 'long long' I/O is enabled; things
1509 dnl like numeric_limits<> specializations are always available.
1511 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1512 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1513 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1514 dnl Where DEFAULT is either `yes' or `no'.
1516 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1517 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1518 if test $enable_long_long = yes; then
1519 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1520 [Define if code specialized for long long should be used.])
1522 AC_MSG_CHECKING([for enabled long long specializations])
1523 AC_MSG_RESULT([$enable_long_long])
1528 dnl Check for template specializations for the 'wchar_t' type.
1530 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1531 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1532 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1533 dnl Where DEFAULT is either `yes' or `no'.
1535 dnl Necessary support (probed along with C99 support) must also be present.
1537 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1538 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1539 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1540 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1541 [Define if code specialized for wchar_t should be used.])
1543 AC_MSG_CHECKING([for enabled wchar_t specializations])
1544 AC_MSG_RESULT([$enable_wchar_t])
1549 dnl Check to see if building and using a C++ precompiled header can be done.
1551 dnl --enable-libstdcxx-pch=yes
1552 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1553 dnl may work, after some light-hearted attempts to puzzle out compiler
1554 dnl support, flip bits on in include/Makefile.am
1556 dnl --disable-libstdcxx-pch
1557 dnl turns off attempts to use or build stdc++.h.gch.
1560 dnl glibcxx_PCHFLAGS
1562 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1563 AC_MSG_CHECKING([for enabled PCH])
1564 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1565 AC_MSG_RESULT([$enable_libstdcxx_pch])
1567 if test $enable_libstdcxx_pch = yes; then
1568 AC_CACHE_CHECK([for compiler with PCH support],
1569 [glibcxx_cv_prog_CXX_pch],
1570 [ac_save_CXXFLAGS="$CXXFLAGS"
1571 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1574 echo '#include <math.h>' > conftest.h
1575 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1576 -o conftest.h.gch 1>&5 2>&1 &&
1577 echo '#error "pch failed"' > conftest.h &&
1578 echo '#include "conftest.h"' > conftest.cc &&
1579 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1581 glibcxx_cv_prog_CXX_pch=yes
1583 glibcxx_cv_prog_CXX_pch=no
1586 CXXFLAGS=$ac_save_CXXFLAGS
1589 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1592 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1593 if test $enable_libstdcxx_pch = yes; then
1594 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1598 AC_SUBST(glibcxx_PCHFLAGS)
1603 dnl Check for exception handling support. If an explicit enable/disable
1604 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1605 dnl target may or may not support call frame exceptions.
1607 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1608 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1609 dnl Neither one forces an attempt at detection.
1612 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1614 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1615 AC_MSG_CHECKING([for exception model to use])
1618 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1619 [force use of builtin_setjmp for exceptions],
1620 [permit yes|no|auto])
1622 if test $enable_sjlj_exceptions = auto; then
1623 # Botheration. Now we've got to detect the exception model. Link tests
1624 # against libgcc.a are problematic since we've not been given proper -L
1625 # bits for single-tree newlib and libgloss.
1627 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1628 cat > conftest.$ac_ext << EOF
1629 [#]line __oline__ "configure"
1638 old_CXXFLAGS="$CXXFLAGS"
1640 if AC_TRY_EVAL(ac_compile); then
1641 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1642 enable_sjlj_exceptions=yes
1643 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1644 enable_sjlj_exceptions=no
1645 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
1646 enable_sjlj_exceptions=no
1649 CXXFLAGS="$old_CXXFLAGS"
1653 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1654 # to two different models.
1655 case $enable_sjlj_exceptions in
1657 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1658 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1659 ac_exception_model_name=sjlj
1662 ac_exception_model_name="call frame"
1665 AC_MSG_ERROR([unable to detect exception model])
1669 AC_MSG_RESULT($ac_exception_model_name)
1674 dnl Add version tags to symbols in shared library (or not), additionally
1675 dnl marking other symbols as private/local (or not).
1677 dnl --enable-symvers=style adds a version script to the linker call when
1678 dnl creating the shared library. The choice of version script is
1679 dnl controlled by 'style'.
1680 dnl --disable-symvers does not.
1681 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1682 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1683 dnl choose a default style based on linker characteristics. Passing
1684 dnl 'no' disables versioning.
1686 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1688 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1689 [enables symbol versioning of the shared library],
1690 [permit yes|no|gnu|darwin-export])
1692 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1693 # don't know enough about $LD to do tricks...
1694 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1696 # Turn a 'yes' into a suitable default.
1697 if test x$enable_symvers = xyes ; then
1698 if test $enable_shared = no ||
1699 test "x$LD" = x ; then
1701 elif test $with_gnu_ld == yes ; then
1704 case ${target_os} in
1706 enable_symvers=darwin-export ;;
1708 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1709 AC_MSG_WARN([=== you are not using a supported linker.])
1710 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1711 enable_symvers=no ;;
1716 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1717 if test $enable_symvers != no; then
1718 AC_MSG_CHECKING([for shared libgcc])
1719 ac_save_CFLAGS="$CFLAGS"
1721 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1722 CFLAGS="$ac_save_CFLAGS"
1723 if test $glibcxx_shared_libgcc = no; then
1724 cat > conftest.c <<EOF
1725 int main (void) { return 0; }
1728 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1729 -shared -shared-libgcc -o conftest.so \
1730 conftest.c -v 2>&1 >/dev/null \
1731 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1733 rm -f conftest.c conftest.so
1734 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1735 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1736 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1737 CFLAGS="$ac_save_CFLAGS"
1740 AC_MSG_RESULT($glibcxx_shared_libgcc)
1743 # If no shared libgcc, can't win.
1744 if test $glibcxx_shared_libgcc != yes &&
1745 test $enable_symvers != no ; then
1746 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1747 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
1748 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1753 # Check to see if 'gnu' can win.
1754 if test $enable_symvers = gnu; then
1755 # For GNU ld, we need at least this version. The format is described in
1756 # GLIBCXX_CHECK_LINKER_FEATURES above.
1757 glibcxx_min_gnu_ld_version=21400
1759 if test $with_gnu_ld != yes ; then
1761 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
1762 AC_MSG_WARN([=== you are not using the GNU linker.])
1763 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1765 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
1766 # The right tools, the right setup, but too old. Fallbacks?
1767 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1768 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1769 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1770 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1771 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1776 # Everything parsed; figure out what file to use.
1777 case $enable_symvers in
1779 SYMVER_MAP=config/linker-map.dummy
1782 SYMVER_MAP=config/linker-map.gnu
1783 AC_DEFINE(_GLIBCXX_SYMVER, 1,
1784 [Define to use GNU symbol versioning in the shared library.])
1787 SYMVER_MAP=config/linker-map.gnu
1791 # In addition, need this to deal with std::size_t mangling in
1792 # src/compatibility.cc. In a perfect world, could use
1793 # typeid(std::size_t).name()[0] to do direct substitution.
1794 AC_MSG_CHECKING([for size_t as unsigned int])
1795 ac_save_CFLAGS="$CFLAGS"
1797 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
1798 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
1799 CFLAGS=$ac_save_CFLAGS
1800 if test "$glibcxx_size_t_is_i" = yes; then
1801 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
1803 AC_MSG_RESULT([$glibcxx_size_t_is_i])
1805 AC_MSG_CHECKING([for ptrdiff_t as int])
1806 ac_save_CFLAGS="$CFLAGS"
1808 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
1809 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
1810 CFLAGS=$ac_save_CFLAGS
1811 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
1812 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
1814 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
1816 AC_SUBST(SYMVER_MAP)
1817 AC_SUBST(port_specific_symbol_files)
1818 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers == gnu)
1819 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN_EXPORT, dnl
1820 test $enable_symvers == darwin-export)
1821 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1826 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1827 dnl We must stage the required headers so that they will be installed
1828 dnl with the library (unlike libgcc, the STL implementation is provided
1829 dnl solely within headers). Since we must not inject random user-space
1830 dnl macro names into user-provided C++ code, we first stage into <file>-in
1831 dnl and process to <file> with an output command. The reason for a two-
1832 dnl stage process here is to correctly handle $srcdir!=$objdir without
1833 dnl having to write complex code (the sed commands to clean the macro
1834 dnl namespace are complex and fragile enough as it is). We must also
1835 dnl add a relative path so that -I- is supported properly.
1838 dnl glibcxx_thread_h
1841 dnl HAVE_GTHR_DEFAULT
1843 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1844 AC_MSG_CHECKING([for thread model used by GCC])
1845 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1846 AC_MSG_RESULT([$target_thread_file])
1848 if test $target_thread_file != single; then
1849 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
1850 [Define if gthr-default.h exists
1851 (meaning that threading support is enabled).])
1854 glibcxx_thread_h=gthr-$target_thread_file.h
1856 dnl Check for __GTHREADS define.
1857 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1858 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1864 AC_SUBST(glibcxx_thread_h)
1868 # Check whether LC_MESSAGES is available in <locale.h>.
1869 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1871 # This file file be copied and used freely without restrictions. It can
1872 # be used in projects which are not available under the GNU Public License
1873 # but which still want to provide support for the GNU gettext functionality.
1874 # Please note that the actual code is *not* freely available.
1877 AC_DEFUN([AC_LC_MESSAGES], [
1878 AC_CHECK_HEADER(locale.h, [
1879 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1880 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1881 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1882 if test $ac_cv_val_LC_MESSAGES = yes; then
1883 AC_DEFINE(HAVE_LC_MESSAGES, 1,
1884 [Define if LC_MESSAGES is available in <locale.h>.])
1890 dnl vim:et:ts=2:sw=2