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 $ac_setrlimit = yes; then
378 AC_DEFINE(_GLIBCXX_RES_LIMITS)
382 AC_MSG_RESULT($ac_res_limits)
387 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
388 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
390 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
391 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
393 [#include <sys/stat.h>],
396 S_ISREG(buffer.st_mode);],
397 [glibcxx_cv_S_ISREG=yes],
398 [glibcxx_cv_S_ISREG=no])
400 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
402 [#include <sys/stat.h>],
405 S_IFREG & buffer.st_mode;],
406 [glibcxx_cv_S_IFREG=yes],
407 [glibcxx_cv_S_IFREG=no])
409 if test $glibcxx_cv_S_ISREG = yes; then
410 AC_DEFINE(HAVE_S_ISREG)
411 elif test $glibcxx_cv_S_IFREG = yes; then
412 AC_DEFINE(HAVE_S_IFREG)
418 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
420 AC_DEFUN([GLIBCXX_CHECK_POLL], [
421 AC_CACHE_VAL(glibcxx_cv_POLL, [
424 [struct pollfd pfd[1];
425 pfd[0].events = POLLIN;
427 [glibcxx_cv_POLL=yes],
428 [glibcxx_cv_POLL=no])
430 if test $glibcxx_cv_POLL = yes; then
437 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
439 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
440 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
442 [#include <sys/uio.h>],
443 [struct iovec iov[2];
445 [glibcxx_cv_WRITEV=yes],
446 [glibcxx_cv_WRITEV=no])
448 if test $glibcxx_cv_WRITEV = yes; then
449 AC_DEFINE(HAVE_WRITEV)
455 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
457 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
458 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
460 [#include <stdint.h>],
462 [glibcxx_cv_INT64_T=yes],
463 [glibcxx_cv_INT64_T=no])
465 if test $glibcxx_cv_INT64_T = yes; then
466 AC_DEFINE(HAVE_INT64_T)
472 dnl Check whether LFS support is available.
474 AC_DEFUN([GLIBCXX_CHECK_LFS], [
477 ac_save_CXXFLAGS="$CXXFLAGS"
478 CXXFLAGS="$CXXFLAGS -fno-exceptions"
479 AC_CACHE_VAL(glibcxx_cv_LFS, [
483 #include <sys/stat.h>
487 fseeko64(fp, 0, SEEK_CUR);
489 lseek64(1, 0, SEEK_CUR);
492 [glibcxx_cv_LFS=yes],
495 if test $glibcxx_cv_LFS = yes; then
496 AC_DEFINE(_GLIBCXX_USE_LFS)
498 CXXFLAGS="$ac_save_CXXFLAGS"
504 dnl Check for whether a fully dynamic basic_string implementation should
505 dnl be turned on, that does not put empty objects in per-process static
506 dnl memory (mostly useful together with shared memory allocators, see PR
507 dnl libstdc++/16612 for details).
509 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
510 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
511 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
512 dnl Where DEFAULT is either `yes' or `no'.
514 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
515 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
516 if test $enable_fully_dynamic_string = yes; then
517 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING)
523 dnl Does any necessary configuration of the testsuite directory. Generates
524 dnl the testsuite_hooks.h header.
526 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
529 dnl enable_abi_check / GLIBCXX_TEST_ABI
530 dnl GLIBCXX_TEST_WCHAR_T
531 dnl GLIBCXX_TEST_THREAD
535 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
536 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
537 # Do checks for resource limit functions.
538 GLIBCXX_CHECK_SETRLIMIT
540 # Look for setenv, so that extended locale tests can be performed.
541 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
543 if test $enable_symvers = no; then
548 enable_abi_check=no ;;
550 enable_abi_check=yes ;;
554 # Only build this as native, since automake does not understand
559 # Export file names for ABI checking.
560 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
561 AC_SUBST(baseline_dir)
563 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
564 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_THREAD, test $enable_thread = yes)
565 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
570 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
574 dnl TOPLEVEL_INCLUDES
576 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
577 # Used for every C++ compile we perform.
579 -I$glibcxx_builddir/include/$host_alias \
580 -I$glibcxx_builddir/include \
581 -I$glibcxx_srcdir/libsupc++"
583 # For Canadian crosses, pick this up too.
584 if test $CANADIAN = yes; then
585 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
588 # Stuff in the actual top level. Currently only used by libsupc++ to
589 # get unwind* headers from the gcc dir.
590 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
591 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
593 # Now, export this to all the little Makefiles....
594 AC_SUBST(GLIBCXX_INCLUDES)
595 AC_SUBST(TOPLEVEL_INCLUDES)
600 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
601 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
604 dnl OPTIMIZE_CXXFLAGS
607 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
608 # Optimization flags that are probably a good idea for thrill-seekers. Just
609 # uncomment the lines below and make, everything else is ready to go...
610 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
612 AC_SUBST(OPTIMIZE_CXXFLAGS)
614 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
620 dnl All installation directory information is determined here.
624 dnl glibcxx_prefixdir
625 dnl glibcxx_toolexecdir
626 dnl glibcxx_toolexeclibdir
628 dnl Assumes cross_compiling bits already done, and with_cross_host in
631 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
632 glibcxx_toolexecdir=no
633 glibcxx_toolexeclibdir=no
634 glibcxx_prefixdir=$prefix
636 AC_MSG_CHECKING([for gxx-include-dir])
637 AC_ARG_WITH([gxx-include-dir],
638 AC_HELP_STRING([--with-gxx-include-dir=DIR],
639 [installation directory for include files]),
641 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
642 no) gxx_include_dir=no ;;
643 *) gxx_include_dir=$withval ;;
645 [gxx_include_dir=no])
646 AC_MSG_RESULT($gxx_include_dir)
648 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
649 AC_ARG_ENABLE([version-specific-runtime-libs],
650 AC_HELP_STRING([--enable-version-specific-runtime-libs],
651 [Specify that runtime libraries should be installed in a compiler-specific directory]),
652 [case "$enableval" in
653 yes) version_specific_libs=yes ;;
654 no) version_specific_libs=no ;;
655 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
657 [version_specific_libs=no])
658 AC_MSG_RESULT($version_specific_libs)
660 # Default case for install directory for include files.
661 if test $version_specific_libs = no && test $gxx_include_dir = no; then
662 gxx_include_dir='${prefix}/include/c++/${gcc_version}'
665 # Version-specific runtime libs processing.
666 if test $version_specific_libs = yes; then
667 # Need the gcc compiler version to know where to install libraries
668 # and header files if --enable-version-specific-runtime-libs option
669 # is selected. FIXME: these variables are misnamed, there are
670 # no executables installed in _toolexecdir or _toolexeclibdir.
671 if test x"$gxx_include_dir" = x"no"; then
672 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
674 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
675 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
678 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
679 # Install a library built with a cross compiler in tooldir, not libdir.
680 if test x"$glibcxx_toolexecdir" = x"no"; then
681 if test -n "$with_cross_host" &&
682 test x"$with_cross_host" != x"no"; then
683 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
684 glibcxx_toolexeclibdir='${toolexecdir}/lib'
686 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
687 glibcxx_toolexeclibdir='${libdir}'
689 multi_os_directory=`$CXX -print-multi-os-directory`
690 case $multi_os_directory in
691 .) ;; # Avoid trailing /.
692 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
696 AC_MSG_CHECKING([for install location])
697 AC_MSG_RESULT($gxx_include_dir)
699 AC_SUBST(glibcxx_prefixdir)
700 AC_SUBST(gxx_include_dir)
701 AC_SUBST(glibcxx_toolexecdir)
702 AC_SUBST(glibcxx_toolexeclibdir)
708 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
709 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
710 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
712 dnl See docs/html/17_intro/configury.html#enable for documentation.
714 m4_define([GLIBCXX_ENABLE],[dnl
715 m4_define([_g_switch],[--enable-$1])dnl
716 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
717 AC_ARG_ENABLE($1,_g_help,
722 m4_bpatsubst([$5],[permit ])) ;;
723 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
724 dnl Idea for future: generate a URL pointing to
725 dnl "onlinedocs/configopts.html#whatever"
732 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
736 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
737 m4_undefine([_g_switch])dnl
738 m4_undefine([_g_help])dnl
743 dnl Check for ISO/IEC 9899:1999 "C99" support.
745 dnl --enable-c99 defines _GLIBCXX_USE_C99
746 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
747 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
748 dnl Where DEFAULT is either `yes' or `no'.
749 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
751 AC_DEFUN([GLIBCXX_ENABLE_C99], [
752 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
754 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos
755 # even if C99 support is turned off.
756 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
757 AC_MSG_CHECKING([for mbstate_t])
758 AC_TRY_COMPILE([#include <wchar.h>],
759 [mbstate_t teststate;],
760 have_mbstate_t=yes, have_mbstate_t=no)
761 AC_MSG_RESULT($have_mbstate_t)
762 if test x"$have_mbstate_t" = xyes; then
763 AC_DEFINE(HAVE_MBSTATE_T)
766 if test x"$enable_c99" = x"yes"; then
771 # Check for the existence of <math.h> functions used if C99 is enabled.
772 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
773 AC_CACHE_VAL(ac_c99_math, [
774 AC_TRY_COMPILE([#include <math.h>],
782 isgreaterequal(0.0,0.0);
784 islessequal(0.0,0.0);
785 islessgreater(0.0,0.0);
786 islessgreater(0.0,0.0);
787 isunordered(0.0,0.0);
788 ],[ac_c99_math=yes], [ac_c99_math=no])
790 AC_MSG_RESULT($ac_c99_math)
791 if test x"$ac_c99_math" = x"yes"; then
792 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
795 # Check for the existence of <complex.h> complex functions.
796 # This is necessary even though libstdc++ uses the builtin versions
797 # of these functions, because if the builtin cannot be used, a reference
798 # to the library function is emitted.
799 # In addition, need to explicitly specify "C" compilation for this
800 # one, or else the backwards C++ <complex.h> include will be selected.
801 save_CXXFLAGS="$CXXFLAGS"
802 CXXFLAGS="$CXXFLAGS -x c"
803 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
805 if test x"$ac_has_complex_h" = x"yes"; then
806 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
807 AC_TRY_COMPILE([#include <complex.h>],
808 [typedef __complex__ float float_type; float_type tmpf;
820 typedef __complex__ double double_type; double_type tmpd;
832 typedef __complex__ long double ld_type; ld_type tmpld;
844 ],[ac_c99_complex=yes], [ac_c99_complex=no])
846 CXXFLAGS="$save_CXXFLAGS"
847 AC_MSG_RESULT($ac_c99_complex)
848 if test x"$ac_c99_complex" = x"yes"; then
849 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX)
852 # Check for the existence in <stdio.h> of vscanf, et. al.
853 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
854 AC_CACHE_VAL(ac_c99_stdio, [
855 AC_TRY_COMPILE([#include <stdio.h>
857 void foo(char* fmt, ...)
859 va_list args; va_start(args, fmt);
860 vfscanf(stderr, "%i", args);
862 vsnprintf(fmt, 0, "%i", args);
863 vsscanf(fmt, "%i", args);
865 [snprintf("12", 0, "%i");],
866 [ac_c99_stdio=yes], [ac_c99_stdio=no])
868 AC_MSG_RESULT($ac_c99_stdio)
870 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
871 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
872 AC_CACHE_VAL(ac_c99_stdlib, [
873 AC_TRY_COMPILE([#include <stdlib.h>],
876 strtold("gnu", &tmp);
881 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
883 AC_MSG_RESULT($ac_c99_stdlib)
885 # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
886 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
888 if test x"$ac_has_wchar_h" = xyes &&
889 test x"$ac_has_wctype_h" = xyes; then
890 AC_TRY_COMPILE([#include <wchar.h>
954 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
956 # Checks for wide character functions that may not be present.
957 # Injection of these is wrapped with guard macros.
958 # NB: only put functions here, instead of immediately above, if
959 # absolutely necessary.
960 AC_TRY_COMPILE([#include <wchar.h>
961 namespace test { using ::vfwscanf; } ], [],
962 [AC_DEFINE(HAVE_VFWSCANF,1,
963 [Defined if vfwscanf exists.])],[])
965 AC_TRY_COMPILE([#include <wchar.h>
966 namespace test { using ::vswscanf; } ], [],
967 [AC_DEFINE(HAVE_VSWSCANF,1,
968 [Defined if vswscanf exists.])],[])
970 AC_TRY_COMPILE([#include <wchar.h>
971 namespace test { using ::vwscanf; } ], [],
972 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
974 AC_TRY_COMPILE([#include <wchar.h>
975 namespace test { using ::wcstof; } ], [],
976 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
978 AC_TRY_COMPILE([#include <wctype.h>],
979 [ wint_t t; int i = iswblank(t);],
980 [AC_DEFINE(HAVE_ISWBLANK,1,
981 [Defined if iswblank exists.])],[])
983 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
984 AC_MSG_RESULT($ac_c99_wchar)
987 # Option parsed, now set things appropriately.
988 if test x"$ac_c99_math" = x"no" ||
989 test x"$ac_c99_complex" = x"no" ||
990 test x"$ac_c99_stdio" = x"no" ||
991 test x"$ac_c99_stdlib" = x"no" ||
992 test x"$ac_c99_wchar" = x"no"; then
995 AC_DEFINE(_GLIBCXX_USE_C99)
1001 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1002 AC_MSG_RESULT($enable_c99)
1007 dnl Check for what type of C headers to use.
1009 dnl --enable-cheaders= [does stuff].
1010 dnl --disable-cheaders [does not do anything, really].
1011 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1012 dnl Where DEFAULT is either `c' or `c_std'.
1014 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1015 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1016 [construct "C" headers for g++], [permit c|c_std])
1017 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1019 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1021 AC_SUBST(C_INCLUDE_DIR)
1022 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1023 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1024 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1029 dnl Check for which locale library to use. The choice is mapped to
1030 dnl a subdirectory of config/locale.
1032 dnl Default is generic.
1034 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1035 AC_MSG_CHECKING([for C locale to use])
1036 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1037 [use MODEL for target locale package],
1038 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1040 # If they didn't use this option switch, or if they specified --enable
1041 # with no specific model, we'll have to look for one. If they
1042 # specified --disable (???), do likewise.
1043 if test $enable_clocale = no || test $enable_clocale = yes; then
1047 # Either a known package, or "auto"
1048 enable_clocale_flag=$enable_clocale
1050 # Probe for locale support if no specific model is specified.
1051 # Default to "generic".
1052 if test $enable_clocale_flag = auto; then
1053 case ${target_os} in
1054 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1055 AC_EGREP_CPP([_GLIBCXX_ok], [
1056 #include <features.h>
1057 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1060 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1062 # Test for bugs early in glibc-2.2.x series
1063 if test $enable_clocale_flag = gnu; then
1065 #define _GNU_SOURCE 1
1068 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1069 extern __typeof(newlocale) __newlocale;
1070 extern __typeof(duplocale) __duplocale;
1071 extern __typeof(strcoll_l) __strcoll_l;
1075 const char __one[] = "Äuglein Augmen";
1076 const char __two[] = "Äuglein";
1081 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1082 loc_dup = __duplocale(loc);
1083 i = __strcoll_l(__one, __two, loc);
1084 j = __strcoll_l(__one, __two, loc_dup);
1088 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1089 [enable_clocale_flag=generic])
1092 # ... at some point put __strxfrm_l tests in as well.
1095 enable_clocale_flag=darwin
1098 enable_clocale_flag=generic
1103 # Deal with gettext issues. Default to not using it (=no) until we detect
1104 # support for it later. Let the user turn it off via --e/d, but let that
1105 # default to on for easier handling.
1108 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1112 # Set configure bits for specified locale package
1113 case ${enable_clocale_flag} in
1115 AC_MSG_RESULT(generic)
1117 CLOCALE_H=config/locale/generic/c_locale.h
1118 CLOCALE_CC=config/locale/generic/c_locale.cc
1119 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1120 CCOLLATE_CC=config/locale/generic/collate_members.cc
1121 CCTYPE_CC=config/locale/generic/ctype_members.cc
1122 CMESSAGES_H=config/locale/generic/messages_members.h
1123 CMESSAGES_CC=config/locale/generic/messages_members.cc
1124 CMONEY_CC=config/locale/generic/monetary_members.cc
1125 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1126 CTIME_H=config/locale/generic/time_members.h
1127 CTIME_CC=config/locale/generic/time_members.cc
1128 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1131 AC_MSG_RESULT(darwin or freebsd)
1133 CLOCALE_H=config/locale/generic/c_locale.h
1134 CLOCALE_CC=config/locale/generic/c_locale.cc
1135 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1136 CCOLLATE_CC=config/locale/generic/collate_members.cc
1137 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1138 CMESSAGES_H=config/locale/generic/messages_members.h
1139 CMESSAGES_CC=config/locale/generic/messages_members.cc
1140 CMONEY_CC=config/locale/generic/monetary_members.cc
1141 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1142 CTIME_H=config/locale/generic/time_members.h
1143 CTIME_CC=config/locale/generic/time_members.cc
1144 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1150 # Declare intention to use gettext, and add support for specific
1152 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1155 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1156 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1157 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1160 # Export the build objects.
1161 for ling in $ALL_LINGUAS; do \
1162 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1163 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1165 AC_SUBST(glibcxx_MOFILES)
1166 AC_SUBST(glibcxx_POFILES)
1168 CLOCALE_H=config/locale/gnu/c_locale.h
1169 CLOCALE_CC=config/locale/gnu/c_locale.cc
1170 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1171 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1172 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1173 CMESSAGES_H=config/locale/gnu/messages_members.h
1174 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1175 CMONEY_CC=config/locale/gnu/monetary_members.cc
1176 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1177 CTIME_H=config/locale/gnu/time_members.h
1178 CTIME_CC=config/locale/gnu/time_members.cc
1179 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1182 AC_MSG_RESULT(IEEE 1003.1)
1184 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1185 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1186 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1187 CCOLLATE_CC=config/locale/generic/collate_members.cc
1188 CCTYPE_CC=config/locale/generic/ctype_members.cc
1189 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1190 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1191 CMONEY_CC=config/locale/generic/monetary_members.cc
1192 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1193 CTIME_H=config/locale/generic/time_members.h
1194 CTIME_CC=config/locale/generic/time_members.cc
1195 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1199 # This is where the testsuite looks for locale catalogs, using the
1200 # -DLOCALEDIR define during testsuite compilation.
1201 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1202 AC_SUBST(glibcxx_localedir)
1204 # A standalone libintl (e.g., GNU libintl) may be in use.
1205 if test $USE_NLS = yes; then
1206 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1207 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1209 if test $USE_NLS = yes; then
1210 AC_DEFINE(_GLIBCXX_USE_NLS)
1215 AC_SUBST(CMESSAGES_H)
1216 AC_SUBST(CCODECVT_CC)
1217 AC_SUBST(CCOLLATE_CC)
1219 AC_SUBST(CMESSAGES_CC)
1221 AC_SUBST(CNUMERIC_CC)
1224 AC_SUBST(CLOCALE_CC)
1225 AC_SUBST(CLOCALE_INTERNAL_H)
1230 dnl Check for which std::allocator base class to use. The choice is
1231 dnl mapped from a subdirectory of include/ext.
1235 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1236 AC_MSG_CHECKING([for std::allocator base class])
1237 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1238 [use KIND for target std::allocator base],
1239 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1241 # If they didn't use this option switch, or if they specified --enable
1242 # with no specific model, we'll have to look for one. If they
1243 # specified --disable (???), do likewise.
1244 if test $enable_libstdcxx_allocator = no ||
1245 test $enable_libstdcxx_allocator = yes;
1247 enable_libstdcxx_allocator=auto
1250 # Either a known package, or "auto". Auto implies the default choice
1251 # for a particular platform.
1252 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1254 # Probe for host-specific support if no specific model is specified.
1256 if test $enable_libstdcxx_allocator_flag = auto; then
1257 case ${target_os} in
1258 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1259 enable_libstdcxx_allocator_flag=mt
1262 enable_libstdcxx_allocator_flag=new
1266 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1269 # Set configure bits for specified locale package
1270 case ${enable_libstdcxx_allocator_flag} in
1272 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1273 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1276 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1277 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1280 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1281 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1284 ALLOCATOR_H=config/allocator/new_allocator_base.h
1285 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1288 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1289 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1293 AC_SUBST(ALLOCATOR_H)
1294 AC_SUBST(ALLOCATOR_NAME)
1299 dnl Check for whether the Boost-derived checks should be turned on.
1301 dnl --enable-concept-checks turns them on.
1302 dnl --disable-concept-checks leaves them off.
1303 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1304 dnl Where DEFAULT is either `yes' or `no'.
1306 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1307 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1308 if test $enable_concept_checks = yes; then
1309 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1315 dnl Check for which I/O library to use: stdio, or something specific.
1317 dnl Default is stdio.
1319 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1320 AC_MSG_CHECKING([for underlying I/O to use])
1321 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1322 [use target-specific I/O package], [permit stdio])
1324 # Now that libio has been removed, you can have any color you want as long
1325 # as it's black. This is one big no-op until other packages are added, but
1326 # showing the framework never hurts.
1327 case ${enable_cstdio} in
1329 CSTDIO_H=config/io/c_io_stdio.h
1330 BASIC_FILE_H=config/io/basic_file_stdio.h
1331 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1332 AC_MSG_RESULT(stdio)
1337 AC_SUBST(BASIC_FILE_H)
1338 AC_SUBST(BASIC_FILE_CC)
1343 dnl Check for "unusual" flags to pass to the compiler while building.
1345 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1346 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1347 dnl --disable-cxx-flags passes nothing.
1348 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1349 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1350 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1351 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1352 dnl If "default flags" is an empty string, the effect is the same
1353 dnl as --disable or --enable=no.
1355 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1356 AC_MSG_CHECKING([for extra compiler flags for building])
1357 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1358 [pass compiler FLAGS when building library],
1359 [case "x$enable_cxx_flags" in
1360 xno | x) enable_cxx_flags= ;;
1362 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1365 # Run through flags (either default or command-line) and set anything
1366 # extra (e.g., #defines) that must accompany particular g++ options.
1367 if test -n "$enable_cxx_flags"; then
1368 for f in $enable_cxx_flags; do
1372 *) # and we're trying to pass /what/ exactly?
1373 AC_MSG_ERROR([compiler flags start with a -]) ;;
1378 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1379 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1380 AC_SUBST(EXTRA_CXX_FLAGS)
1385 dnl Check to see if debugging libraries are to be built.
1387 dnl --enable-libstdcxx-debug
1388 dnl builds a separate set of debugging libraries in addition to the
1389 dnl normal (shared, static) libstdc++ binaries.
1391 dnl --disable-libstdcxx-debug
1392 dnl builds only one (non-debug) version of libstdc++.
1394 dnl --enable-libstdcxx-debug-flags=FLAGS
1395 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1397 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1398 dnl Where DEFAULT is either `yes' or `no'.
1400 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1401 AC_MSG_CHECKING([for additional debug build])
1402 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1403 AC_MSG_RESULT($enable_libstdcxx_debug)
1404 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1409 dnl Check for explicit debug flags.
1411 dnl --enable-libstdcxx-debug-flags='-O1'
1412 dnl is a general method for passing flags to be used when
1413 dnl building debug libraries with --enable-debug.
1415 dnl --disable-libstdcxx-debug-flags does nothing.
1416 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1417 dnl If "default flags" is an empty string, the effect is the same
1418 dnl as --disable or --enable=no.
1420 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1421 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1422 [pass compiler FLAGS when building debug library],
1423 [case "x$enable_libstdcxx_debug_flags" in
1424 xno | x) enable_libstdcxx_debug_flags= ;;
1426 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1429 # Option parsed, now set things appropriately
1430 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1431 AC_SUBST(DEBUG_FLAGS)
1433 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1438 dnl Check if the user only wants a freestanding library implementation.
1440 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1441 dnl installing only the headers required by [17.4.1.3] and the language
1442 dnl support library. More than that will be built (to keep the Makefiles
1443 dnl conveniently clean), but not installed.
1446 dnl is_hosted (yes/no)
1449 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1451 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1452 AC_ARG_ENABLE([hosted-libstdcxx],
1453 AC_HELP_STRING([--disable-hosted-libstdcxx],
1454 [only build freestanding C++ runtime support]),,
1457 enable_hosted_libstdcxx=no
1460 enable_hosted_libstdcxx=yes
1463 if test "$enable_hosted_libstdcxx" = no; then
1464 AC_MSG_NOTICE([Only freestanding libraries will be built])
1468 enable_libstdcxx_pch=no
1473 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1474 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1475 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1480 dnl Check for template specializations for the 'long long' type.
1481 dnl The result determines only whether 'long long' I/O is enabled; things
1482 dnl like numeric_limits<> specializations are always available.
1484 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1485 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1486 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1487 dnl Where DEFAULT is either `yes' or `no'.
1489 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1490 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1491 if test $enable_long_long = yes; then
1492 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1494 AC_MSG_CHECKING([for enabled long long specializations])
1495 AC_MSG_RESULT([$enable_long_long])
1500 dnl Check for template specializations for the 'wchar_t' type.
1502 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1503 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1504 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1505 dnl Where DEFAULT is either `yes' or `no'.
1507 dnl Necessary support (probed along with C99 support) must also be present.
1509 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1510 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1511 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1512 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
1514 AC_MSG_CHECKING([for enabled wchar_t specializations])
1515 AC_MSG_RESULT([$enable_wchar_t])
1520 dnl Check to see if building and using a C++ precompiled header can be done.
1522 dnl --enable-libstdcxx-pch=yes
1523 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1524 dnl may work, after some light-hearted attempts to puzzle out compiler
1525 dnl support, flip bits on in include/Makefile.am
1527 dnl --disable-libstdcxx-pch
1528 dnl turns off attempts to use or build stdc++.h.gch.
1531 dnl glibcxx_PCHFLAGS
1533 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1534 AC_MSG_CHECKING([for enabled PCH])
1535 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1536 AC_MSG_RESULT([$enable_libstdcxx_pch])
1538 if test $enable_libstdcxx_pch = yes; then
1539 AC_CACHE_CHECK([for compiler with PCH support],
1540 [glibcxx_cv_prog_CXX_pch],
1541 [ac_save_CXXFLAGS="$CXXFLAGS"
1542 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1545 echo '#include <math.h>' > conftest.h
1546 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1547 -o conftest.h.gch 1>&5 2>&1 &&
1548 echo '#error "pch failed"' > conftest.h &&
1549 echo '#include "conftest.h"' > conftest.cc &&
1550 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1552 glibcxx_cv_prog_CXX_pch=yes
1554 glibcxx_cv_prog_CXX_pch=no
1557 CXXFLAGS=$ac_save_CXXFLAGS
1560 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1563 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1564 if test $enable_libstdcxx_pch = yes; then
1565 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1569 AC_SUBST(glibcxx_PCHFLAGS)
1574 dnl Check for exception handling support. If an explicit enable/disable
1575 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1576 dnl target may or may not support call frame exceptions.
1578 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1579 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1580 dnl Neither one forces an attempt at detection.
1583 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1585 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1586 AC_MSG_CHECKING([for exception model to use])
1589 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1590 [force use of builtin_setjmp for exceptions],
1591 [permit yes|no|auto])
1593 if test $enable_sjlj_exceptions = auto; then
1594 # Botheration. Now we've got to detect the exception model. Link tests
1595 # against libgcc.a are problematic since we've not been given proper -L
1596 # bits for single-tree newlib and libgloss.
1598 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1599 cat > conftest.$ac_ext << EOF
1600 [#]line __oline__ "configure"
1609 old_CXXFLAGS="$CXXFLAGS"
1611 if AC_TRY_EVAL(ac_compile); then
1612 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1613 enable_sjlj_exceptions=yes
1614 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1615 enable_sjlj_exceptions=no
1618 CXXFLAGS="$old_CXXFLAGS"
1622 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1623 # to two different models.
1624 case $enable_sjlj_exceptions in
1626 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1627 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1628 ac_exception_model_name=sjlj
1631 ac_exception_model_name="call frame"
1634 AC_MSG_ERROR([unable to detect exception model])
1638 AC_MSG_RESULT($ac_exception_model_name)
1643 dnl Add version tags to symbols in shared library (or not), additionally
1644 dnl marking other symbols as private/local (or not).
1646 dnl --enable-symvers=style adds a version script to the linker call when
1647 dnl creating the shared library. The choice of version script is
1648 dnl controlled by 'style'.
1649 dnl --disable-symvers does not.
1650 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1651 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1652 dnl choose a default style based on linker characteristics. Passing
1653 dnl 'no' disables versioning.
1655 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1657 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1658 [enables symbol versioning of the shared library],
1659 [permit yes|no|gnu])
1661 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1662 # don't know enough about $LD to do tricks...
1663 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1664 # FIXME The following test is too strict, in theory.
1665 if test $enable_shared = no ||
1667 test x$glibcxx_gnu_ld_version = x; then
1671 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1672 if test $enable_symvers != no; then
1673 AC_MSG_CHECKING([for shared libgcc])
1674 ac_save_CFLAGS="$CFLAGS"
1676 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1677 CFLAGS="$ac_save_CFLAGS"
1678 if test $glibcxx_shared_libgcc = no; then
1679 cat > conftest.c <<EOF
1680 int main (void) { return 0; }
1683 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1684 -shared -shared-libgcc -o conftest.so \
1685 conftest.c -v 2>&1 >/dev/null \
1686 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1688 rm -f conftest.c conftest.so
1689 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1690 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1691 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1692 CFLAGS="$ac_save_CFLAGS"
1695 AC_MSG_RESULT($glibcxx_shared_libgcc)
1698 # For GNU ld, we need at least this version. The format is described in
1699 # GLIBCXX_CHECK_LINKER_FEATURES above.
1700 glibcxx_min_gnu_ld_version=21400
1701 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1703 # Check to see if unspecified "yes" value can win, given results above.
1704 # Change "yes" into either "no" or a style name.
1705 if test $enable_symvers = yes; then
1706 if test $with_gnu_ld = yes &&
1707 test $glibcxx_shared_libgcc = yes;
1709 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1712 # The right tools, the right setup, but too old. Fallbacks?
1713 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1714 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1715 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1716 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1717 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1718 # Globbing fix is present, proper block support is not.
1719 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1720 dnl enable_symvers=???
1721 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1725 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1731 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1732 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1733 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1734 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1739 # Everything parsed; figure out what file to use.
1740 case $enable_symvers in
1742 SYMVER_MAP=config/linker-map.dummy
1745 SYMVER_MAP=config/linker-map.gnu
1746 AC_DEFINE(_GLIBCXX_SYMVER)
1750 AC_SUBST(SYMVER_MAP)
1751 AC_SUBST(port_specific_symbol_files)
1752 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1753 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1758 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1759 dnl We must stage the required headers so that they will be installed
1760 dnl with the library (unlike libgcc, the STL implementation is provided
1761 dnl solely within headers). Since we must not inject random user-space
1762 dnl macro names into user-provided C++ code, we first stage into <file>-in
1763 dnl and process to <file> with an output command. The reason for a two-
1764 dnl stage process here is to correctly handle $srcdir!=$objdir without
1765 dnl having to write complex code (the sed commands to clean the macro
1766 dnl namespace are complex and fragile enough as it is). We must also
1767 dnl add a relative path so that -I- is supported properly.
1770 dnl glibcxx_thread_h
1773 dnl HAVE_GTHR_DEFAULT
1775 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1776 AC_MSG_CHECKING([for thread model used by GCC])
1777 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1778 AC_MSG_RESULT([$target_thread_file])
1780 if test $target_thread_file != single; then
1781 AC_DEFINE(HAVE_GTHR_DEFAULT)
1784 glibcxx_thread_h=gthr-$target_thread_file.h
1786 dnl Check for __GTHREADS define.
1787 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1788 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1794 AC_SUBST(glibcxx_thread_h)
1798 # Check whether LC_MESSAGES is available in <locale.h>.
1799 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1801 # This file file be copied and used freely without restrictions. It can
1802 # be used in projects which are not available under the GNU Public License
1803 # but which still want to provide support for the GNU gettext functionality.
1804 # Please note that the actual code is *not* freely available.
1807 AC_DEFUN([AC_LC_MESSAGES], [
1808 AC_CHECK_HEADER(locale.h, [
1809 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1810 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1811 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1812 if test $ac_cv_val_LC_MESSAGES = yes; then
1813 AC_DEFINE(HAVE_LC_MESSAGES)
1819 dnl vim:et:ts=2:sw=2