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 $host.
35 dnl gcc_version (x.y.z format)
38 dnl glibcxx_builddir (absolute path)
39 dnl glibcxx_srcdir (absolute path)
40 dnl toplevel_srcdir (absolute path)
43 dnl with_target_subdir
45 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
46 dnl - default settings for all AM_CONFITIONAL test variables
47 dnl - lots of tools, like CC and CXX
49 AC_DEFUN([GLIBCXX_CONFIGURE], [
50 # Keep these sync'd with the list in Makefile.am. The first provides an
51 # expandable list at autoconf time; the second provides an expandable list
52 # (i.e., shell variable) at configure time.
53 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
54 SUBDIRS='glibcxx_SUBDIRS'
56 # These need to be absolute paths, yet at the same time need to
57 # canonicalize only relative paths, because then amd will not unmount
58 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
59 glibcxx_builddir=`${PWDCMD-pwd}`
61 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
62 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
64 toplevel_srcdir=${glibcxx_srcdir}/..
65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
67 AC_SUBST(toplevel_srcdir)
69 # We use these options to decide which functions to include. They are
70 # set from the top level.
71 AC_ARG_WITH([target-subdir],
72 AC_HELP_STRING([--with-target-subdir=SUBDIR],
73 [configuring in a subdirectory]))
75 AC_ARG_WITH([cross-host],
76 AC_HELP_STRING([--with-cross-host=HOST],
77 [configuring with a cross compiler]))
80 AC_HELP_STRING([--with-newlib],
81 [assume newlib as a system C library]))
83 # We're almost certainly being configured before anything else which uses
84 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
85 # we not cache the value of CXX that we "discover" here, because it's set
86 # to something unique for us and libjava. Other target libraries need to
87 # find CXX for themselves. We yank the rug out from under the normal AC_*
88 # process by sneakily renaming the cache variable. This also lets us debug
89 # the value of "our" CXX in postmortems.
91 # We must also force CXX to /not/ be a precious variable, otherwise the
92 # wrong (non-multilib-adjusted) value will be used in multilibs. This
93 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
94 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
95 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
97 # -fno-builtin must be present here so that a non-conflicting form of
98 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
100 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
101 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
102 m4_define([_AC_ARG_VAR_PRECIOUS],[])
103 save_CXXFLAGS="$CXXFLAGS"
104 CXXFLAGS="$CXXFLAGS -fno-builtin"
107 CXXFLAGS="$save_CXXFLAGS"
108 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
112 # For directory versioning (e.g., headers) and other variables.
113 AC_MSG_CHECKING([for GCC version number])
114 gcc_version=`$CXX -dumpversion`
115 AC_MSG_RESULT($gcc_version)
117 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
118 # available). Uncomment the next line to force a particular method.
122 AC_CHECK_TOOL(AS, as)
123 AC_CHECK_TOOL(AR, ar)
124 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
128 # Set up safe default values for all subsequent AM_CONDITIONAL tests
129 # which are themselves conditionally expanded.
130 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
131 ## other macros from doing the same. This should be automated.) -pme
134 #enable_libstdcxx_debug=no
135 #enable_libstdcxx_pch=no
140 #enable_hosted_libstdcxx=yes
142 # Find platform-specific directories containing configuration info.
143 # Also possibly modify flags used elsewhere, as needed by the platform.
148 m4_include([linkage.m4])
149 m4_include([../config/no-executables.m4])
153 dnl Tests for newer compiler features, or features that are present in newer
154 dnl compiler versions but not older compiler versions still in use, should
158 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
159 dnl new inlining code or the new system_header pragma will die on -Werror.
160 dnl Leave it out by default and use maint-mode to use it.
161 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
162 dnl compiler supports it and the user has not requested debug mode.
164 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
165 # All these tests are for C++; save the language and the compiler flags.
166 # The CXXFLAGS thing is suspicious, but based on similar bits previously
167 # found in GLIBCXX_CONFIGURE.
170 ac_test_CXXFLAGS="${CXXFLAGS+set}"
171 ac_save_CXXFLAGS="$CXXFLAGS"
173 # Check for maintainer-mode bits.
174 if test x"$USE_MAINTAINER_MODE" = xno; then
180 # Check for -ffunction-sections -fdata-sections
181 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
182 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
183 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
184 if test "$ac_test_CXXFLAGS" = set; then
185 CXXFLAGS="$ac_save_CXXFLAGS"
187 # this is the suspicious part
190 if test x"$ac_fdsections" = x"yes"; then
191 SECTION_FLAGS='-ffunction-sections -fdata-sections'
193 AC_MSG_RESULT($ac_fdsections)
197 AC_SUBST(SECTION_FLAGS)
202 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
203 dnl the native linker is in use, all variables will be defined to something
204 dnl safe (like an empty string).
207 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
208 dnl OPT_LDFLAGS='-Wl,-O1' if possible
209 dnl LD (as a side effect of testing)
212 dnl glibcxx_gnu_ld_version (possibly)
214 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
215 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
217 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
218 # If we're not using GNU ld, then there's no point in even trying these
219 # tests. Check for that first. We should have already tested for gld
220 # by now (in libtool), but require it now just to be safe...
221 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
222 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
223 AC_REQUIRE([AC_PROG_LD])
224 AC_REQUIRE([AC_PROG_AWK])
226 # The name set by libtool depends on the version of libtool. Shame on us
227 # for depending on an impl detail, but c'est la vie. Older versions used
228 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
229 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
230 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
231 # set (hence we're using an older libtool), then set it.
232 if test x${with_gnu_ld+set} != xset; then
233 if test x${ac_cv_prog_gnu_ld+set} != xset; then
234 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
237 with_gnu_ld=$ac_cv_prog_gnu_ld
241 # Start by getting the version number. I think the libtool test already
242 # does some of this, but throws away the result.
244 ldver=`$LD --version 2>/dev/null | head -1 | \
245 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
247 glibcxx_gnu_ld_version=`echo $ldver | \
248 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
251 if test "$with_gnu_ld" = "notbroken"; then
252 # GNU ld it is! Joy and bunny rabbits!
254 # All these tests are for C++; save the language and the compiler flags.
255 # Need to do this so that g++ won't try to link in libstdc++
256 ac_test_CFLAGS="${CFLAGS+set}"
257 ac_save_CFLAGS="$CFLAGS"
258 CFLAGS='-x c++ -Wl,--gc-sections'
260 # Check for -Wl,--gc-sections
261 # XXX This test is broken at the moment, as symbols required for linking
262 # are now in libsupc++ (not built yet). In addition, this test has
263 # cored on solaris in the past. In addition, --gc-sections doesn't
264 # really work at the moment (keeps on discarding used sections, first
265 # .eh_frame and now some of the glibc sections for iconv).
266 # Bzzzzt. Thanks for playing, maybe next time.
267 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
275 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
276 if test "$ac_test_CFLAGS" = set; then
277 CFLAGS="$ac_save_CFLAGS"
279 # this is the suspicious part
282 if test "$ac_sectionLDflags" = "yes"; then
283 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
285 AC_MSG_RESULT($ac_sectionLDflags)
288 # Set linker optimization flags.
289 if test x"$with_gnu_ld" = x"yes"; then
290 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
293 AC_SUBST(SECTION_LDFLAGS)
294 AC_SUBST(OPT_LDFLAGS)
299 dnl Check to see if this target can enable the wchar_t parts.
300 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
301 dnl must have been previously checked.) By default, wide characters are
305 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
306 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
308 dnl LIBICONV to a -l string containing the iconv library, if needed.
310 AC_DEFUN([GLIBCXX_CHECK_WCHAR_T_SUPPORT], [
311 # Test wchar.h for mbstate_t, which is needed for char_traits and
312 # others even if wchar_t support is not on.
313 AC_MSG_CHECKING([for mbstate_t])
314 AC_TRY_COMPILE([#include <wchar.h>],
315 [mbstate_t teststate;],
316 have_mbstate_t=yes, have_mbstate_t=no)
317 AC_MSG_RESULT($have_mbstate_t)
318 if test x"$have_mbstate_t" = xyes; then
319 AC_DEFINE(HAVE_MBSTATE_T)
322 # Sanity check for existence of ISO C99 headers for extended encoding.
323 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
324 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
326 # Only continue checking if the ISO C99 headers exist and support is on.
327 if test x"$ac_has_wchar_h" = xyes &&
328 test x"$ac_has_wctype_h" = xyes &&
329 test x"$enable_c_mbchar" != xno; then
331 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
332 # numeric_limits can instantiate type_traits<wchar_t>
333 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
334 AC_TRY_COMPILE([#include <wchar.h>],
335 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
336 has_wchar_minmax=yes, has_wchar_minmax=no)
337 AC_MSG_RESULT($has_wchar_minmax)
339 # Test wchar.h for WEOF, which is what we use to determine whether
340 # to specialize for char_traits<wchar_t> or not.
341 AC_MSG_CHECKING([for WEOF])
344 #include <stddef.h>],
346 has_weof=yes, has_weof=no)
347 AC_MSG_RESULT($has_weof)
349 # Tests for wide character functions used in char_traits<wchar_t>.
351 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
354 # Checks for names injected into std:: by the c_std headers.
355 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
356 fwprintf fwscanf swprintf swscanf vfwprintf vswprintf \
357 vwprintf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
358 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstol \
359 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
360 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
363 # Checks for wide character functions that are not required
364 # for basic wchar_t support. Don't disable support if they are missing.
365 # Injection of these is wrapped with guard macros.
366 AC_CHECK_FUNCS([vfwscanf vswscanf vwscanf wcstof iswblank],[],[])
368 AC_MSG_CHECKING([for ISO C99 wchar_t support])
369 if test x"$has_weof" = xyes &&
370 test x"$has_wchar_minmax" = xyes &&
371 test x"$ac_wfuncs" = xyes;
373 ac_isoC99_wchar_t=yes
377 AC_MSG_RESULT($ac_isoC99_wchar_t)
379 # Use iconv for wchar_t to char conversions. As such, check for
380 # X/Open Portability Guide, version 2 features (XPG2).
381 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
382 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
384 # Check for existence of libiconv.a providing XPG2 wchar_t support.
385 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
387 LIBS="$LIBS $LIBICONV"
390 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
391 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
395 AC_MSG_CHECKING([for XPG2 wchar_t support])
396 if test x"$ac_has_iconv_h" = xyes &&
397 test x"$ac_has_langinfo_h" = xyes &&
398 test x"$ac_XPG2funcs" = xyes;
404 AC_MSG_RESULT($ac_XPG2_wchar_t)
406 # At the moment, only enable wchar_t specializations if all the
407 # above support is present.
408 if test x"$ac_isoC99_wchar_t" = xyes &&
409 test x"$ac_XPG2_wchar_t" = xyes;
411 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
415 AC_MSG_CHECKING([for enabled wchar_t specializations])
416 AC_MSG_RESULT($enable_wchar_t)
421 dnl Check for headers for, and arguments to, the setrlimit() function.
422 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
425 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
426 dnl various HAVE_LIMIT_* for individual limit names
428 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
431 #include <sys/time.h>
432 #include <sys/resource.h>
434 [ int f = RLIMIT_$1 ; ],
435 [glibcxx_mresult=1], [glibcxx_mresult=0])
436 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
437 [Only used in build directory testsuite_hooks.h.])
440 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
441 setrlimit_have_headers=yes
442 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
444 [setrlimit_have_headers=no])
445 # If don't have the headers, then we can't run the tests now, and we
446 # won't be seeing any of these during testsuite compilation.
447 if test $setrlimit_have_headers = yes; then
448 # Can't do these in a loop, else the resulting syntax is wrong.
449 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
450 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
451 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
452 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
453 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
455 # Check for rlimit, setrlimit.
456 AC_CACHE_VAL(ac_setrlimit, [
459 #include <sys/time.h>
460 #include <sys/resource.h>
464 [ac_setrlimit=yes], [ac_setrlimit=no])
468 AC_MSG_CHECKING([for testsuite resource limits support])
469 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
471 AC_DEFINE(_GLIBCXX_RES_LIMITS)
475 AC_MSG_RESULT($ac_res_limits)
480 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
481 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
483 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
484 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
486 [#include <sys/stat.h>],
489 S_ISREG(buffer.st_mode);],
490 [glibcxx_cv_S_ISREG=yes],
491 [glibcxx_cv_S_ISREG=no])
493 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
495 [#include <sys/stat.h>],
498 S_IFREG & buffer.st_mode;],
499 [glibcxx_cv_S_IFREG=yes],
500 [glibcxx_cv_S_IFREG=no])
502 if test $glibcxx_cv_S_ISREG = yes; then
503 AC_DEFINE(HAVE_S_ISREG)
504 elif test $glibcxx_cv_S_IFREG = yes; then
505 AC_DEFINE(HAVE_S_IFREG)
511 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
513 AC_DEFUN([GLIBCXX_CHECK_POLL], [
514 AC_CACHE_VAL(glibcxx_cv_POLL, [
517 [struct pollfd pfd[1];
518 pfd[0].events = POLLIN;
520 [glibcxx_cv_POLL=yes],
521 [glibcxx_cv_POLL=no])
523 if test $glibcxx_cv_POLL = yes; then
530 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
532 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
533 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
535 [#include <sys/uio.h>],
536 [struct iovec iov[2];
538 [glibcxx_cv_WRITEV=yes],
539 [glibcxx_cv_WRITEV=no])
541 if test $glibcxx_cv_WRITEV = yes; then
542 AC_DEFINE(HAVE_WRITEV)
548 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
550 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
551 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
553 [#include <stdint.h>],
555 [glibcxx_cv_INT64_T=yes],
556 [glibcxx_cv_INT64_T=no])
558 if test $glibcxx_cv_INT64_T = yes; then
559 AC_DEFINE(HAVE_INT64_T)
565 dnl Check whether LFS support is available.
567 AC_DEFUN([GLIBCXX_CHECK_LFS], [
570 ac_save_CXXFLAGS="$CXXFLAGS"
571 CXXFLAGS="$CXXFLAGS -fno-exceptions"
572 AC_CACHE_VAL(glibcxx_cv_LFS, [
576 #include <sys/stat.h>
580 fseeko64(fp, 0, SEEK_CUR);
582 lseek64(1, 0, SEEK_CUR);
585 [glibcxx_cv_LFS=yes],
588 if test $glibcxx_cv_LFS = yes; then
589 AC_DEFINE(_GLIBCXX_USE_LFS)
591 CXXFLAGS="$ac_save_CXXFLAGS"
597 dnl Check for whether a fully dynamic basic_string implementation should
598 dnl be turned on, that does not put empty objects in per-process static
599 dnl memory (mostly useful together with shared memory allocators, see PR
600 dnl libstdc++/16612 for details).
602 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
603 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
604 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
605 dnl Where DEFAULT is either `yes' or `no'.
607 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
608 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
609 if test $enable_fully_dynamic_string = yes; then
610 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING)
616 dnl Does any necessary configuration of the testsuite directory. Generates
617 dnl the testsuite_hooks.h header.
619 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
622 dnl enable_abi_check / GLIBCXX_TEST_ABI
623 dnl GLIBCXX_TEST_WCHAR_T
624 dnl GLIBCXX_TEST_THREAD
628 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
629 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
630 # Do checks for resource limit functions.
631 GLIBCXX_CHECK_SETRLIMIT
633 # Look for setenv, so that extended locale tests can be performed.
634 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
636 if test $enable_symvers = no; then
641 enable_abi_check=no ;;
643 enable_abi_check=yes ;;
647 # Only build this as native, since automake does not understand
652 # Export file names for ABI checking.
653 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
654 AC_SUBST(baseline_dir)
656 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
657 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_THREAD, test $enable_thread = yes)
658 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
663 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
667 dnl TOPLEVEL_INCLUDES
669 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
670 # Used for every C++ compile we perform.
672 -I$glibcxx_builddir/include/$host_alias \
673 -I$glibcxx_builddir/include \
674 -I$glibcxx_srcdir/libsupc++"
676 # For Canadian crosses, pick this up too.
677 if test $CANADIAN = yes; then
678 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
681 # Stuff in the actual top level. Currently only used by libsupc++ to
682 # get unwind* headers from the gcc dir.
683 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
684 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
686 # Now, export this to all the little Makefiles....
687 AC_SUBST(GLIBCXX_INCLUDES)
688 AC_SUBST(TOPLEVEL_INCLUDES)
693 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
694 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
697 dnl OPTIMIZE_CXXFLAGS
700 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
701 # Optimization flags that are probably a good idea for thrill-seekers. Just
702 # uncomment the lines below and make, everything else is ready to go...
703 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
705 AC_SUBST(OPTIMIZE_CXXFLAGS)
707 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
713 dnl All installation directory information is determined here.
717 dnl glibcxx_prefixdir
718 dnl glibcxx_toolexecdir
719 dnl glibcxx_toolexeclibdir
721 dnl Assumes cross_compiling bits already done, and with_cross_host in
724 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
725 glibcxx_toolexecdir=no
726 glibcxx_toolexeclibdir=no
727 glibcxx_prefixdir=$prefix
729 AC_MSG_CHECKING([for gxx-include-dir])
730 AC_ARG_WITH([gxx-include-dir],
731 AC_HELP_STRING([--with-gxx-include-dir=DIR],
732 [installation directory for include files]),
734 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
735 no) gxx_include_dir=no ;;
736 *) gxx_include_dir=$withval ;;
738 [gxx_include_dir=no])
739 AC_MSG_RESULT($gxx_include_dir)
741 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
742 AC_ARG_ENABLE([version-specific-runtime-libs],
743 AC_HELP_STRING([--enable-version-specific-runtime-libs],
744 [Specify that runtime libraries should be installed in a compiler-specific directory]),
745 [case "$enableval" in
746 yes) version_specific_libs=yes ;;
747 no) version_specific_libs=no ;;
748 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
750 [version_specific_libs=no])
751 AC_MSG_RESULT($version_specific_libs)
753 # Default case for install directory for include files.
754 if test $version_specific_libs = no && test $gxx_include_dir = no; then
755 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
758 # Version-specific runtime libs processing.
759 if test $version_specific_libs = yes; then
760 # Need the gcc compiler version to know where to install libraries
761 # and header files if --enable-version-specific-runtime-libs option
762 # is selected. FIXME: these variables are misnamed, there are
763 # no executables installed in _toolexecdir or _toolexeclibdir.
764 if test x"$gxx_include_dir" = x"no"; then
765 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++
767 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
768 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
771 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
772 # Install a library built with a cross compiler in tooldir, not libdir.
773 if test x"$glibcxx_toolexecdir" = x"no"; then
774 if test -n "$with_cross_host" &&
775 test x"$with_cross_host" != x"no"; then
776 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
777 glibcxx_toolexeclibdir='${toolexecdir}/lib'
779 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
780 glibcxx_toolexeclibdir='${libdir}'
782 multi_os_directory=`$CXX -print-multi-os-directory`
783 case $multi_os_directory in
784 .) ;; # Avoid trailing /.
785 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
789 AC_MSG_CHECKING([for install location])
790 AC_MSG_RESULT($gxx_include_dir)
792 AC_SUBST(glibcxx_prefixdir)
793 AC_SUBST(gxx_include_dir)
794 AC_SUBST(glibcxx_toolexecdir)
795 AC_SUBST(glibcxx_toolexeclibdir)
801 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
802 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
803 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
805 dnl See docs/html/17_intro/configury.html#enable for documentation.
807 m4_define([GLIBCXX_ENABLE],[dnl
808 m4_define([_g_switch],[--enable-$1])dnl
809 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
810 AC_ARG_ENABLE($1,_g_help,
815 m4_bpatsubst([$5],[permit ])) ;;
816 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
817 dnl Idea for future: generate a URL pointing to
818 dnl "onlinedocs/configopts.html#whatever"
825 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
829 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
830 m4_undefine([_g_switch])dnl
831 m4_undefine([_g_help])dnl
836 dnl Check for ISO/IEC 9899:1999 "C99" support.
838 dnl --enable-c99 defines _GLIBCXX_USE_C99
839 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
840 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
841 dnl Where DEFAULT is either `yes' or `no'.
842 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
844 AC_DEFUN([GLIBCXX_ENABLE_C99], [
845 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
850 # Check for the existence of <math.h> functions used if C99 is enabled.
852 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
853 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
854 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
855 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
856 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
857 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
858 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
859 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
860 AC_TRY_COMPILE([#include <math.h>],
861 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
862 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
863 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
864 AC_TRY_COMPILE([#include <math.h>],
865 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
866 AC_TRY_COMPILE([#include <math.h>],
867 [isunordered(0.0,0.0);],, [ac_c99_math=no])
868 AC_MSG_RESULT($ac_c99_math)
870 if test x"$ac_c99_math" = x"yes"; then
871 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
874 # Check for the existence of <math.h> complex functions.
875 # This is necessary even though libstdc++ uses the builtin versions
876 # of these functions, because if the builtin cannot be used, a reference
877 # to the library function is emitted.
878 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
880 if test x"$ac_has_complex_h" = x"yes"; then
882 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
883 AC_TRY_COMPILE([#include <complex.h>],
884 [typedef __complex__ float _ComplexT; _ComplexT tmp;
885 cabsf(tmp);],, [ac_c99_complex=no])
886 AC_TRY_COMPILE([#include <complex.h>],
887 [typedef __complex__ double _ComplexT; _ComplexT tmp;
888 cabs(tmp);],, [ac_c99_complex=no])
889 AC_TRY_COMPILE([#include <complex.h>],
890 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
891 cabsl(tmp);],, [ac_c99_complex=no])
892 AC_TRY_COMPILE([#include <complex.h>],
893 [typedef __complex__ float _ComplexT; _ComplexT tmp;
894 cargf(tmp);],, [ac_c99_complex=no])
895 AC_TRY_COMPILE([#include <complex.h>],
896 [typedef __complex__ double _ComplexT; _ComplexT tmp;
897 carg(tmp);],, [ac_c99_complex=no])
898 AC_TRY_COMPILE([#include <complex.h>],
899 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
900 cargl(tmp);],, [ac_c99_complex=no])
901 AC_TRY_COMPILE([#include <complex.h>],
902 [typedef __complex__ float _ComplexT; _ComplexT tmp;
903 ccosf(tmp);],, [ac_c99_complex=no])
904 AC_TRY_COMPILE([#include <complex.h>],
905 [typedef __complex__ double _ComplexT; _ComplexT tmp;
906 ccos(tmp);],, [ac_c99_complex=no])
907 AC_TRY_COMPILE([#include <complex.h>],
908 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
909 ccosl(tmp);],, [ac_c99_complex=no])
910 AC_TRY_COMPILE([#include <complex.h>],
911 [typedef __complex__ float _ComplexT; _ComplexT tmp;
912 ccoshf(tmp);],, [ac_c99_complex=no])
913 AC_TRY_COMPILE([#include <complex.h>],
914 [typedef __complex__ double _ComplexT; _ComplexT tmp;
915 ccosh(tmp);],, [ac_c99_complex=no])
916 AC_TRY_COMPILE([#include <complex.h>],
917 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
918 ccoshl(tmp);],, [ac_c99_complex=no])
919 AC_TRY_COMPILE([#include <complex.h>],
920 [typedef __complex__ float _ComplexT; _ComplexT tmp;
921 cexpf(tmp);],, [ac_c99_complex=no])
922 AC_TRY_COMPILE([#include <complex.h>],
923 [typedef __complex__ double _ComplexT; _ComplexT tmp;
924 cexp(tmp);],, [ac_c99_complex=no])
925 AC_TRY_COMPILE([#include <complex.h>],
926 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
927 cexpl(tmp);],, [ac_c99_complex=no])
928 AC_TRY_COMPILE([#include <complex.h>],
929 [typedef __complex__ float _ComplexT; _ComplexT tmp;
930 csinf(tmp);],, [ac_c99_complex=no])
931 AC_TRY_COMPILE([#include <complex.h>],
932 [typedef __complex__ double _ComplexT; _ComplexT tmp;
933 csin(tmp);],, [ac_c99_complex=no])
934 AC_TRY_COMPILE([#include <complex.h>],
935 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
936 csinl(tmp);],, [ac_c99_complex=no])
937 AC_TRY_COMPILE([#include <complex.h>],
938 [typedef __complex__ float _ComplexT; _ComplexT tmp;
939 csinhf(tmp);],, [ac_c99_complex=no])
940 AC_TRY_COMPILE([#include <complex.h>],
941 [typedef __complex__ double _ComplexT; _ComplexT tmp;
942 csinh(tmp);],, [ac_c99_complex=no])
943 AC_TRY_COMPILE([#include <complex.h>],
944 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
945 csinhl(tmp);],, [ac_c99_complex=no])
946 AC_TRY_COMPILE([#include <complex.h>],
947 [typedef __complex__ float _ComplexT; _ComplexT tmp;
948 csqrtf(tmp);],, [ac_c99_complex=no])
949 AC_TRY_COMPILE([#include <complex.h>],
950 [typedef __complex__ double _ComplexT; _ComplexT tmp;
951 csqrt(tmp);],, [ac_c99_complex=no])
952 AC_TRY_COMPILE([#include <complex.h>],
953 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
954 csqrtl(tmp);],, [ac_c99_complex=no])
955 AC_TRY_COMPILE([#include <complex.h>],
956 [typedef __complex__ float _ComplexT; _ComplexT tmp;
957 ctanf(tmp);],, [ac_c99_complex=no])
958 AC_TRY_COMPILE([#include <complex.h>],
959 [typedef __complex__ double _ComplexT; _ComplexT tmp;
960 ctan(tmp);],, [ac_c99_complex=no])
961 AC_TRY_COMPILE([#include <complex.h>],
962 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
963 ctanl(tmp);],, [ac_c99_complex=no])
964 AC_TRY_COMPILE([#include <complex.h>],
965 [typedef __complex__ float _ComplexT; _ComplexT tmp;
966 ctanhf(tmp);],, [ac_c99_complex=no])
967 AC_TRY_COMPILE([#include <complex.h>],
968 [typedef __complex__ double _ComplexT; _ComplexT tmp;
969 ctanh(tmp);],, [ac_c99_complex=no])
970 AC_TRY_COMPILE([#include <complex.h>],
971 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
972 ctanhl(tmp);],, [ac_c99_complex=no])
973 AC_TRY_COMPILE([#include <complex.h>],
974 [typedef __complex__ float _ComplexT; _ComplexT tmp;
975 cpowf(tmp, tmp);],, [ac_c99_complex=no])
976 AC_TRY_COMPILE([#include <complex.h>],
977 [typedef __complex__ double _ComplexT; _ComplexT tmp;
978 cpow(tmp, tmp);],, [ac_c99_complex=no])
979 AC_TRY_COMPILE([#include <complex.h>],
980 [typedef __complex__ long double _ComplexT; _ComplexT tmp;
981 cpowl(tmp, tmp);],, [ac_c99_complex=no])
983 AC_MSG_RESULT($ac_c99_complex)
985 if test x"$ac_c99_complex" = x"yes"; then
986 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_MATH)
989 # Check for the existence in <stdio.h> of vscanf, et. al.
991 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
992 AC_TRY_COMPILE([#include <stdio.h>],
993 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
994 AC_TRY_COMPILE([#include <stdio.h>
996 void foo(char* fmt, ...)
997 {va_list args; va_start(args, fmt);
998 vfscanf(stderr, "%i", args);}],
999 [],, [ac_c99_stdio=no])
1000 AC_TRY_COMPILE([#include <stdio.h>
1002 void foo(char* fmt, ...)
1003 {va_list args; va_start(args, fmt);
1004 vscanf("%i", args);}],
1005 [],, [ac_c99_stdio=no])
1006 AC_TRY_COMPILE([#include <stdio.h>
1008 void foo(char* fmt, ...)
1009 {va_list args; va_start(args, fmt);
1010 vsnprintf(fmt, 0, "%i", args);}],
1011 [],, [ac_c99_stdio=no])
1012 AC_TRY_COMPILE([#include <stdio.h>
1014 void foo(char* fmt, ...)
1015 {va_list args; va_start(args, fmt);
1016 vsscanf(fmt, "%i", args);}],
1017 [],, [ac_c99_stdio=no])
1018 AC_MSG_RESULT($ac_c99_stdio)
1020 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1022 AC_MSG_CHECKING([for lldiv_t declaration])
1023 AC_CACHE_VAL(ac_c99_lldiv_t, [
1024 AC_TRY_COMPILE([#include <stdlib.h>],
1026 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1028 AC_MSG_RESULT($ac_c99_lldiv_t)
1030 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1031 AC_TRY_COMPILE([#include <stdlib.h>],
1032 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1033 AC_TRY_COMPILE([#include <stdlib.h>],
1034 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1035 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1036 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1037 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1038 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1039 if test x"$ac_c99_lldiv_t" = x"no"; then
1042 AC_MSG_RESULT($ac_c99_stdlib)
1044 # Check for the existence of <wchar.h> functions used if C99 is enabled.
1045 # XXX the wchar.h checks should be rolled into the general C99 bits.
1047 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1048 AC_TRY_COMPILE([#include <wchar.h>],
1049 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1050 AC_TRY_COMPILE([#include <wchar.h>],
1051 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1052 AC_TRY_COMPILE([#include <wchar.h>],
1053 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1054 AC_MSG_RESULT($ac_c99_wchar)
1056 AC_MSG_CHECKING([for enabled ISO C99 support])
1057 if test x"$ac_c99_math" = x"no" ||
1058 test x"$ac_c99_stdio" = x"no" ||
1059 test x"$ac_c99_stdlib" = x"no" ||
1060 test x"$ac_c99_wchar" = x"no"; then
1063 AC_MSG_RESULT($enable_c99)
1065 if test x"$ac_99_math" = x"yes"; then
1066 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
1069 # Option parsed, now set things appropriately
1070 if test x"$enable_c99" = x"yes"; then
1071 AC_DEFINE(_GLIBCXX_USE_C99)
1079 dnl Check for what type of C headers to use.
1081 dnl --enable-cheaders= [does stuff].
1082 dnl --disable-cheaders [does not do anything, really].
1083 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1084 dnl Where DEFAULT is either `c' or `c_std'.
1086 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1087 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1088 [construct "C" headers for g++], [permit c|c_std])
1089 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1091 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1093 AC_SUBST(C_INCLUDE_DIR)
1094 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1095 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1096 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1101 dnl Check for which locale library to use. The choice is mapped to
1102 dnl a subdirectory of config/locale.
1104 dnl Default is generic.
1106 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1107 AC_MSG_CHECKING([for C locale to use])
1108 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1109 [use MODEL for target locale package],
1110 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1112 # If they didn't use this option switch, or if they specified --enable
1113 # with no specific model, we'll have to look for one. If they
1114 # specified --disable (???), do likewise.
1115 if test $enable_clocale = no || test $enable_clocale = yes; then
1119 # Either a known package, or "auto"
1120 enable_clocale_flag=$enable_clocale
1122 # Probe for locale support if no specific model is specified.
1123 # Default to "generic".
1124 if test $enable_clocale_flag = auto; then
1125 case ${target_os} in
1126 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1127 AC_EGREP_CPP([_GLIBCXX_ok], [
1128 #include <features.h>
1129 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1132 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1134 # Test for bugs early in glibc-2.2.x series
1135 if test $enable_clocale_flag = gnu; then
1137 #define _GNU_SOURCE 1
1140 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1141 extern __typeof(newlocale) __newlocale;
1142 extern __typeof(duplocale) __duplocale;
1143 extern __typeof(strcoll_l) __strcoll_l;
1147 const char __one[] = "Äuglein Augmen";
1148 const char __two[] = "Äuglein";
1153 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1154 loc_dup = __duplocale(loc);
1155 i = __strcoll_l(__one, __two, loc);
1156 j = __strcoll_l(__one, __two, loc_dup);
1160 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1161 [enable_clocale_flag=generic])
1164 # ... at some point put __strxfrm_l tests in as well.
1167 enable_clocale_flag=darwin
1170 enable_clocale_flag=generic
1175 # Deal with gettext issues. Default to not using it (=no) until we detect
1176 # support for it later. Let the user turn it off via --e/d, but let that
1177 # default to on for easier handling.
1180 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1184 # Set configure bits for specified locale package
1185 case ${enable_clocale_flag} in
1187 AC_MSG_RESULT(generic)
1189 CLOCALE_H=config/locale/generic/c_locale.h
1190 CLOCALE_CC=config/locale/generic/c_locale.cc
1191 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1192 CCOLLATE_CC=config/locale/generic/collate_members.cc
1193 CCTYPE_CC=config/locale/generic/ctype_members.cc
1194 CMESSAGES_H=config/locale/generic/messages_members.h
1195 CMESSAGES_CC=config/locale/generic/messages_members.cc
1196 CMONEY_CC=config/locale/generic/monetary_members.cc
1197 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1198 CTIME_H=config/locale/generic/time_members.h
1199 CTIME_CC=config/locale/generic/time_members.cc
1200 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1203 AC_MSG_RESULT(darwin)
1205 CLOCALE_H=config/locale/generic/c_locale.h
1206 CLOCALE_CC=config/locale/generic/c_locale.cc
1207 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1208 CCOLLATE_CC=config/locale/generic/collate_members.cc
1209 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1210 CMESSAGES_H=config/locale/generic/messages_members.h
1211 CMESSAGES_CC=config/locale/generic/messages_members.cc
1212 CMONEY_CC=config/locale/generic/monetary_members.cc
1213 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1214 CTIME_H=config/locale/generic/time_members.h
1215 CTIME_CC=config/locale/generic/time_members.cc
1216 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1222 # Declare intention to use gettext, and add support for specific
1224 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1227 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1228 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1229 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1232 # Export the build objects.
1233 for ling in $ALL_LINGUAS; do \
1234 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1235 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1237 AC_SUBST(glibcxx_MOFILES)
1238 AC_SUBST(glibcxx_POFILES)
1240 CLOCALE_H=config/locale/gnu/c_locale.h
1241 CLOCALE_CC=config/locale/gnu/c_locale.cc
1242 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1243 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1244 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1245 CMESSAGES_H=config/locale/gnu/messages_members.h
1246 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1247 CMONEY_CC=config/locale/gnu/monetary_members.cc
1248 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1249 CTIME_H=config/locale/gnu/time_members.h
1250 CTIME_CC=config/locale/gnu/time_members.cc
1251 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1254 AC_MSG_RESULT(IEEE 1003.1)
1256 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1257 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1258 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1259 CCOLLATE_CC=config/locale/generic/collate_members.cc
1260 CCTYPE_CC=config/locale/generic/ctype_members.cc
1261 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1262 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1263 CMONEY_CC=config/locale/generic/monetary_members.cc
1264 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1265 CTIME_H=config/locale/generic/time_members.h
1266 CTIME_CC=config/locale/generic/time_members.cc
1267 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1271 # This is where the testsuite looks for locale catalogs, using the
1272 # -DLOCALEDIR define during testsuite compilation.
1273 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1274 AC_SUBST(glibcxx_localedir)
1276 # A standalone libintl (e.g., GNU libintl) may be in use.
1277 if test $USE_NLS = yes; then
1278 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1279 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1281 if test $USE_NLS = yes; then
1282 AC_DEFINE(_GLIBCXX_USE_NLS)
1287 AC_SUBST(CMESSAGES_H)
1288 AC_SUBST(CCODECVT_CC)
1289 AC_SUBST(CCOLLATE_CC)
1291 AC_SUBST(CMESSAGES_CC)
1293 AC_SUBST(CNUMERIC_CC)
1296 AC_SUBST(CLOCALE_CC)
1297 AC_SUBST(CLOCALE_INTERNAL_H)
1302 dnl Check for which std::allocator base class to use. The choice is
1303 dnl mapped from a subdirectory of include/ext.
1307 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1308 AC_MSG_CHECKING([for std::allocator base class to use])
1309 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1310 [use KIND for target std::allocator base],
1311 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1313 # If they didn't use this option switch, or if they specified --enable
1314 # with no specific model, we'll have to look for one. If they
1315 # specified --disable (???), do likewise.
1316 if test $enable_libstdcxx_allocator = no ||
1317 test $enable_libstdcxx_allocator = yes;
1319 enable_libstdcxx_allocator=auto
1322 # Either a known package, or "auto". Auto implies the default choice
1323 # for a particular platform.
1324 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1326 # Probe for host-specific support if no specific model is specified.
1328 if test $enable_libstdcxx_allocator_flag = auto; then
1329 case ${target_os} in
1330 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1331 enable_libstdcxx_allocator_flag=mt
1334 enable_libstdcxx_allocator_flag=new
1338 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1341 # Set configure bits for specified locale package
1342 case ${enable_libstdcxx_allocator_flag} in
1344 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1345 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1348 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1349 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1352 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1353 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1356 ALLOCATOR_H=config/allocator/new_allocator_base.h
1357 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1360 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1361 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1365 AC_SUBST(ALLOCATOR_H)
1366 AC_SUBST(ALLOCATOR_NAME)
1371 dnl Check for whether the Boost-derived checks should be turned on.
1373 dnl --enable-concept-checks turns them on.
1374 dnl --disable-concept-checks leaves them off.
1375 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1376 dnl Where DEFAULT is either `yes' or `no'.
1378 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1379 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1380 if test $enable_concept_checks = yes; then
1381 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1387 dnl Check for which I/O library to use: stdio, or something specific.
1389 dnl Default is stdio.
1391 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1392 AC_MSG_CHECKING([for underlying I/O to use])
1393 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1394 [use target-specific I/O package], [permit stdio])
1396 # Now that libio has been removed, you can have any color you want as long
1397 # as it's black. This is one big no-op until other packages are added, but
1398 # showing the framework never hurts.
1399 case ${enable_cstdio} in
1401 CSTDIO_H=config/io/c_io_stdio.h
1402 BASIC_FILE_H=config/io/basic_file_stdio.h
1403 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1404 AC_MSG_RESULT(stdio)
1409 AC_SUBST(BASIC_FILE_H)
1410 AC_SUBST(BASIC_FILE_CC)
1415 dnl Check for "unusual" flags to pass to the compiler while building.
1417 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1418 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1419 dnl --disable-cxx-flags passes nothing.
1420 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1421 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1422 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1423 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1424 dnl If "default flags" is an empty string, the effect is the same
1425 dnl as --disable or --enable=no.
1427 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1428 AC_MSG_CHECKING([for extra compiler flags for building])
1429 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1430 [pass compiler FLAGS when building library],
1431 [case "x$enable_cxx_flags" in
1432 xno | x) enable_cxx_flags= ;;
1434 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1437 # Run through flags (either default or command-line) and set anything
1438 # extra (e.g., #defines) that must accompany particular g++ options.
1439 if test -n "$enable_cxx_flags"; then
1440 for f in $enable_cxx_flags; do
1444 *) # and we're trying to pass /what/ exactly?
1445 AC_MSG_ERROR([compiler flags start with a -]) ;;
1450 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1451 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1452 AC_SUBST(EXTRA_CXX_FLAGS)
1457 dnl Check for wide character support. Has the same effect as the option
1458 dnl in gcc's configure, but in a form that autoconf can mess with.
1460 dnl --enable-c-mbchar requests all the wchar_t stuff.
1461 dnl --disable-c-mbchar doesn't.
1462 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1463 dnl Where DEFAULT is either `yes' or `no'.
1465 AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [
1466 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1467 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1472 dnl Check to see if debugging libraries are to be built.
1474 dnl --enable-libstdcxx-debug
1475 dnl builds a separate set of debugging libraries in addition to the
1476 dnl normal (shared, static) libstdc++ binaries.
1478 dnl --disable-libstdcxx-debug
1479 dnl builds only one (non-debug) version of libstdc++.
1481 dnl --enable-libstdcxx-debug-flags=FLAGS
1482 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1484 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1485 dnl Where DEFAULT is either `yes' or `no'.
1487 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1488 AC_MSG_CHECKING([for additional debug build])
1489 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1490 AC_MSG_RESULT($enable_libstdcxx_debug)
1491 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1496 dnl Check for explicit debug flags.
1498 dnl --enable-libstdcxx-debug-flags='-O1'
1499 dnl is a general method for passing flags to be used when
1500 dnl building debug libraries with --enable-debug.
1502 dnl --disable-libstdcxx-debug-flags does nothing.
1503 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1504 dnl If "default flags" is an empty string, the effect is the same
1505 dnl as --disable or --enable=no.
1507 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1508 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1509 [pass compiler FLAGS when building debug library],
1510 [case "x$enable_libstdcxx_debug_flags" in
1511 xno | x) enable_libstdcxx_debug_flags= ;;
1513 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1516 # Option parsed, now set things appropriately
1517 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1518 AC_SUBST(DEBUG_FLAGS)
1520 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1525 dnl Check if the user only wants a freestanding library implementation.
1527 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1528 dnl installing only the headers required by [17.4.1.3] and the language
1529 dnl support library. More than that will be built (to keep the Makefiles
1530 dnl conveniently clean), but not installed.
1533 dnl is_hosted (yes/no)
1536 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1538 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1539 AC_ARG_ENABLE([hosted-libstdcxx],
1540 AC_HELP_STRING([--disable-hosted-libstdcxx],
1541 [only build freestanding C++ runtime support]),,
1544 enable_hosted_libstdcxx=no
1547 enable_hosted_libstdcxx=yes
1550 if test "$enable_hosted_libstdcxx" = no; then
1551 AC_MSG_NOTICE([Only freestanding libraries will be built])
1555 enable_libstdcxx_pch=no
1560 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1561 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1562 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1567 dnl Check for template specializations for the 'long long' type extension.
1568 dnl The result determines only whether 'long long' I/O is enabled; things
1569 dnl like numeric_limits<> specializations are always available.
1571 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1572 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1573 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1574 dnl Where DEFAULT is either `yes' or `no'.
1576 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1577 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1578 if test $enable_long_long = yes; then
1579 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1585 dnl Check to see if building and using a C++ precompiled header can be done.
1587 dnl --enable-libstdcxx-pch=yes
1588 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1589 dnl may work, after some light-hearted attempts to puzzle out compiler
1590 dnl support, flip bits on in include/Makefile.am
1592 dnl --disable-libstdcxx-pch
1593 dnl turns off attempts to use or build stdc++.h.gch.
1596 dnl glibcxx_PCHFLAGS
1598 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1599 AC_MSG_CHECKING([for enabled PCH])
1600 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1601 AC_MSG_RESULT([$enable_libstdcxx_pch])
1603 if test $enable_libstdcxx_pch = yes; then
1604 AC_CACHE_CHECK([for compiler with PCH support],
1605 [glibcxx_cv_prog_CXX_pch],
1606 [ac_save_CXXFLAGS="$CXXFLAGS"
1607 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1610 echo '#include <math.h>' > conftest.h
1611 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1612 -o conftest.h.gch 1>&5 2>&1 &&
1613 echo '#error "pch failed"' > conftest.h &&
1614 echo '#include "conftest.h"' > conftest.cc &&
1615 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1617 glibcxx_cv_prog_CXX_pch=yes
1619 glibcxx_cv_prog_CXX_pch=no
1622 CXXFLAGS=$ac_save_CXXFLAGS
1625 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1628 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1629 if test $enable_libstdcxx_pch = yes; then
1630 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1634 AC_SUBST(glibcxx_PCHFLAGS)
1639 dnl Check for exception handling support. If an explicit enable/disable
1640 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1641 dnl target may or may not support call frame exceptions.
1643 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1644 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1645 dnl Neither one forces an attempt at detection.
1648 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1650 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1651 AC_MSG_CHECKING([for exception model to use])
1654 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1655 [force use of builtin_setjmp for exceptions],
1656 [permit yes|no|auto])
1658 if test $enable_sjlj_exceptions = auto; then
1659 # Botheration. Now we've got to detect the exception model. Link tests
1660 # against libgcc.a are problematic since we've not been given proper -L
1661 # bits for single-tree newlib and libgloss.
1663 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1664 cat > conftest.$ac_ext << EOF
1665 [#]line __oline__ "configure"
1674 old_CXXFLAGS="$CXXFLAGS"
1676 if AC_TRY_EVAL(ac_compile); then
1677 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1678 enable_sjlj_exceptions=yes
1679 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1680 enable_sjlj_exceptions=no
1683 CXXFLAGS="$old_CXXFLAGS"
1687 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1688 # to two different models.
1689 case $enable_sjlj_exceptions in
1691 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1692 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1693 ac_exception_model_name=sjlj
1696 ac_exception_model_name="call frame"
1699 AC_MSG_ERROR([unable to detect exception model])
1703 AC_MSG_RESULT($ac_exception_model_name)
1708 dnl Add version tags to symbols in shared library (or not), additionally
1709 dnl marking other symbols as private/local (or not).
1711 dnl --enable-symvers=style adds a version script to the linker call when
1712 dnl creating the shared library. The choice of version script is
1713 dnl controlled by 'style'.
1714 dnl --disable-symvers does not.
1715 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1716 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1717 dnl choose a default style based on linker characteristics. Passing
1718 dnl 'no' disables versioning.
1720 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1722 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1723 [enables symbol versioning of the shared library],
1724 [permit yes|no|gnu])
1726 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1727 # don't know enough about $LD to do tricks...
1728 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1729 # FIXME The following test is too strict, in theory.
1730 if test $enable_shared = no ||
1732 test x$glibcxx_gnu_ld_version = x; then
1736 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1737 if test $enable_symvers != no; then
1738 AC_MSG_CHECKING([for shared libgcc])
1739 ac_save_CFLAGS="$CFLAGS"
1741 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1742 CFLAGS="$ac_save_CFLAGS"
1743 if test $glibcxx_shared_libgcc = no; then
1744 cat > conftest.c <<EOF
1745 int main (void) { return 0; }
1748 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1749 -shared -shared-libgcc -o conftest.so \
1750 conftest.c -v 2>&1 >/dev/null \
1751 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1753 rm -f conftest.c conftest.so
1754 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1755 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1756 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1757 CFLAGS="$ac_save_CFLAGS"
1760 AC_MSG_RESULT($glibcxx_shared_libgcc)
1763 # For GNU ld, we need at least this version. The format is described in
1764 # GLIBCXX_CHECK_LINKER_FEATURES above.
1765 glibcxx_min_gnu_ld_version=21400
1766 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1768 # Check to see if unspecified "yes" value can win, given results above.
1769 # Change "yes" into either "no" or a style name.
1770 if test $enable_symvers = yes; then
1771 if test $with_gnu_ld = yes &&
1772 test $glibcxx_shared_libgcc = yes;
1774 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1777 # The right tools, the right setup, but too old. Fallbacks?
1778 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1779 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1780 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1781 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1782 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1783 # Globbing fix is present, proper block support is not.
1784 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1785 dnl enable_symvers=???
1786 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1790 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1796 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1797 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1798 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1799 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1804 # Everything parsed; figure out what file to use.
1805 case $enable_symvers in
1807 SYMVER_MAP=config/linker-map.dummy
1810 SYMVER_MAP=config/linker-map.gnu
1811 AC_DEFINE(_GLIBCXX_SYMVER)
1815 AC_SUBST(SYMVER_MAP)
1816 AC_SUBST(port_specific_symbol_files)
1817 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1818 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1823 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1824 dnl We must stage the required headers so that they will be installed
1825 dnl with the library (unlike libgcc, the STL implementation is provided
1826 dnl solely within headers). Since we must not inject random user-space
1827 dnl macro names into user-provided C++ code, we first stage into <file>-in
1828 dnl and process to <file> with an output command. The reason for a two-
1829 dnl stage process here is to correctly handle $srcdir!=$objdir without
1830 dnl having to write complex code (the sed commands to clean the macro
1831 dnl namespace are complex and fragile enough as it is). We must also
1832 dnl add a relative path so that -I- is supported properly.
1835 dnl glibcxx_thread_h
1838 dnl HAVE_GTHR_DEFAULT
1840 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1841 AC_MSG_CHECKING([for thread model used by GCC])
1842 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1843 AC_MSG_RESULT([$target_thread_file])
1845 if test $target_thread_file != single; then
1846 AC_DEFINE(HAVE_GTHR_DEFAULT)
1849 glibcxx_thread_h=gthr-$target_thread_file.h
1851 dnl Check for __GTHREADS define.
1852 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1853 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1859 AC_SUBST(glibcxx_thread_h)
1863 # Check whether LC_MESSAGES is available in <locale.h>.
1864 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1866 # This file file be copied and used freely without restrictions. It can
1867 # be used in projects which are not available under the GNU Public License
1868 # but which still want to provide support for the GNU gettext functionality.
1869 # Please note that the actual code is *not* freely available.
1872 AC_DEFUN([AC_LC_MESSAGES], [
1873 AC_CHECK_HEADER(locale.h, [
1874 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1875 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1876 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1877 if test $ac_cv_val_LC_MESSAGES = yes; then
1878 AC_DEFINE(HAVE_LC_MESSAGES)
1884 sinclude([../libtool.m4])
1885 dnl The lines below arrange for aclocal not to bring an installed
1886 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1887 dnl add a definition of LIBTOOL to Makefile.in.
1888 ifelse(,,,[AC_SUBST(LIBTOOL)
1889 AC_DEFUN([AM_PROG_LIBTOOL])
1890 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1891 AC_DEFUN([AC_PROG_LD])
1894 dnl vim:et:ts=2:sw=2