3 dnl Check to see what architecture and operating system we are compiling
4 dnl for. Also, if architecture- or OS-specific flags are required for
5 dnl compilation, pick them up here.
7 AC_DEFUN(GLIBCXX_CHECK_HOST, [
8 . $glibcxx_srcdir/configure.host
9 AC_MSG_NOTICE(CPU config directory is $cpu_include_dir)
10 AC_MSG_NOTICE(OS config directory is $os_include_dir)
15 dnl Initialize basic configure bits.
20 AC_DEFUN(GLIBCXX_TOPREL_CONFIGURE, [
21 # Sets up multi_basedir, which is srcdir/.. plus the usual
22 # "multi_source_toprel_bottom_adjust" lunacy as needed.
23 AM_ENABLE_MULTILIB(, ..)
25 # The generated code is exactly the same, except that automake's looks in
26 # ".. $srcdir/.." and autoconf's looks in multi_basedir. Apparently other
27 # things are triggered on the presence of the two ...AUX_DIR[S], but I don't
28 # know what they are or what the other differences might be (and they keep
31 # Looking in multi_basedir seems smarter, so actually execute that branch.
33 # this is for automake
36 # this is for autoconf
37 AC_CONFIG_AUX_DIRS(${multi_basedir})
46 dnl Initialize the rest of the library configury. At this point we have
47 dnl variables like $host.
50 dnl gcc_version (x.y.z format)
52 dnl glibcxx_builddir (absolute path)
53 dnl glibcxx_srcdir (absolute path)
54 dnl toplevel_srcdir (absolute path)
57 dnl with_target_subdir
59 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
60 dnl - default settings for all AM_CONFITIONAL test variables
61 dnl - lots of tools, like CC and CXX
63 AC_DEFUN(GLIBCXX_CONFIGURE, [
64 # These need to be absolute paths, yet at the same time need to
65 # canonicalize only relative paths, because then amd will not unmount
66 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
67 glibcxx_builddir=`${PWDCMD-pwd}`
69 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
70 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
72 toplevel_srcdir=${glibcxx_srcdir}/..
73 AC_SUBST(glibcxx_builddir)
74 AC_SUBST(glibcxx_srcdir)
75 AC_SUBST(toplevel_srcdir)
77 # We use these options to decide which functions to include. They are
78 # set from the top level.
79 AC_ARG_WITH([target-subdir],
80 AC_HELP_STRING([--with-target-subdir=SUBDIR],
81 [configuring in a subdirectory]))
83 AC_ARG_WITH([cross-host],
84 AC_HELP_STRING([--with-cross-host=HOST],
85 [configuring with a cross compiler]))
88 AC_HELP_STRING([--with-newlib],
89 [assume newlib as a system C library]))
93 # We're almost certainly being configured before anything else which uses
94 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
95 # we not cache the value of CXX that we "discover" here, because it's set
96 # to something unique for us and libjava. Other target libraries need to
97 # find CXX for themselves. We yank the rug out from under the normal AC_*
98 # process by sneakily renaming the cache variable. This also lets us debug
99 # the value of "our" CXX in postmortems.
101 # We must also force CXX to /not/ be a precious variable, otherwise the
102 # wrong (non-multilib-adjusted) value will be used in multilibs. This
103 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
104 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
107 # -fno-builtin must be present here so that a non-conflicting form of
108 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
109 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
110 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
111 m4_define([_AC_ARG_VAR_PRECIOUS],[])
112 save_CXXFLAGS="$CXXFLAGS"
113 CXXFLAGS="$CXXFLAGS -fno-builtin"
115 CXXFLAGS="$save_CXXFLAGS"
116 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
119 # For directory versioning (e.g., headers) and other variables.
120 AC_MSG_CHECKING([for GCC version number])
121 gcc_version=`$CXX -dumpversion`
122 AC_MSG_RESULT($gcc_version)
124 # For some reason, gettext needs this.
127 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
128 # available). Uncomment the next line to force a particular method.
132 AC_CHECK_TOOL(AS, as)
133 AC_CHECK_TOOL(AR, ar)
134 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
138 # Set up safe default values for all subsequent AM_CONDITIONAL tests.
141 #enable_libstdcxx_debug=no
142 #enable_libstdcxx_pch=no
148 # Find platform-specific directories containing configuration info.
149 # Also possibly modify flags used elsewhere, as needed by the platform.
154 m4_include([linkage.m4])
158 dnl Tests for newer compiler features, or features that are present in newer
159 dnl compiler versions but not older compiler versions still in use, should
163 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
164 dnl new inlining code or the new system_header pragma will die on -Werror.
165 dnl Leave it out by default and use maint-mode to use it.
166 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
167 dnl compiler supports it and the user has not requested debug mode.
169 AC_DEFUN(GLIBCXX_CHECK_COMPILER_FEATURES, [
170 # All these tests are for C++; save the language and the compiler flags.
171 # The CXXFLAGS thing is suspicious, but based on similar bits previously
172 # found in GLIBCXX_CONFIGURE.
175 ac_test_CXXFLAGS="${CXXFLAGS+set}"
176 ac_save_CXXFLAGS="$CXXFLAGS"
178 # Check for maintainer-mode bits.
179 if test x"$USE_MAINTAINER_MODE" = xno; then
185 # Check for -ffunction-sections -fdata-sections
186 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
187 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
188 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
189 if test "$ac_test_CXXFLAGS" = set; then
190 CXXFLAGS="$ac_save_CXXFLAGS"
192 # this is the suspicious part
195 if test x"$ac_fdsections" = x"yes"; then
196 SECTION_FLAGS='-ffunction-sections -fdata-sections'
198 AC_MSG_RESULT($ac_fdsections)
202 AC_SUBST(SECTION_FLAGS)
207 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
208 dnl the native linker is in use, all variables will be defined to something
209 dnl safe (like an empty string).
212 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
213 dnl OPT_LDFLAGS='-Wl,-O1' if possible
214 dnl LD (as a side effect of testing)
217 dnl glibcxx_gnu_ld_version (possibly)
219 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
220 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
222 AC_DEFUN(GLIBCXX_CHECK_LINKER_FEATURES, [
223 # If we're not using GNU ld, then there's no point in even trying these
224 # tests. Check for that first. We should have already tested for gld
225 # by now (in libtool), but require it now just to be safe...
226 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
227 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
228 AC_REQUIRE([AC_PROG_LD])
229 AC_REQUIRE([AC_PROG_AWK])
231 # The name set by libtool depends on the version of libtool. Shame on us
232 # for depending on an impl detail, but c'est la vie. Older versions used
233 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
234 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
235 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
236 # set (hence we're using an older libtool), then set it.
237 if test x${with_gnu_ld+set} != xset; then
238 if test x${ac_cv_prog_gnu_ld+set} != xset; then
239 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
242 with_gnu_ld=$ac_cv_prog_gnu_ld
246 # Start by getting the version number. I think the libtool test already
247 # does some of this, but throws away the result.
249 ldver=`$LD --version 2>/dev/null | head -1 | \
250 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
252 glibcxx_gnu_ld_version=`echo $ldver | \
253 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
256 if test "$with_gnu_ld" = "notbroken"; then
257 # GNU ld it is! Joy and bunny rabbits!
259 # All these tests are for C++; save the language and the compiler flags.
260 # Need to do this so that g++ won't try to link in libstdc++
261 ac_test_CFLAGS="${CFLAGS+set}"
262 ac_save_CFLAGS="$CFLAGS"
263 CFLAGS='-x c++ -Wl,--gc-sections'
265 # Check for -Wl,--gc-sections
266 # XXX This test is broken at the moment, as symbols required for linking
267 # are now in libsupc++ (not built yet). In addition, this test has
268 # cored on solaris in the past. In addition, --gc-sections doesn't
269 # really work at the moment (keeps on discarding used sections, first
270 # .eh_frame and now some of the glibc sections for iconv).
271 # Bzzzzt. Thanks for playing, maybe next time.
272 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
280 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
281 if test "$ac_test_CFLAGS" = set; then
282 CFLAGS="$ac_save_CFLAGS"
284 # this is the suspicious part
287 if test "$ac_sectionLDflags" = "yes"; then
288 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
290 AC_MSG_RESULT($ac_sectionLDflags)
293 # Set linker optimization flags.
294 if test x"$with_gnu_ld" = x"yes"; then
295 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
298 AC_SUBST(SECTION_LDFLAGS)
299 AC_SUBST(OPT_LDFLAGS)
304 dnl Check to see if this target can enable the wchar_t parts.
305 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
306 dnl must have been previously checked.) By default, wide characters are
310 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
311 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
313 AC_DEFUN(GLIBCXX_CHECK_WCHAR_T_SUPPORT, [
314 # Test wchar.h for mbstate_t, which is needed for char_traits and
315 # others even if wchar_t support is not on.
316 AC_MSG_CHECKING([for mbstate_t])
317 AC_TRY_COMPILE([#include <wchar.h>],
318 [mbstate_t teststate;],
319 have_mbstate_t=yes, have_mbstate_t=no)
320 AC_MSG_RESULT($have_mbstate_t)
321 if test x"$have_mbstate_t" = xyes; then
322 AC_DEFINE(HAVE_MBSTATE_T)
325 # Sanity check for existence of ISO C99 headers for extended encoding.
326 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
327 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
329 # Only continue checking if the ISO C99 headers exist and support is on.
330 if test x"$ac_has_wchar_h" = xyes &&
331 test x"$ac_has_wctype_h" = xyes &&
332 test x"$enable_c_mbchar" != xno; then
334 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
335 # numeric_limits can instantiate type_traits<wchar_t>
336 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
337 AC_TRY_COMPILE([#include <wchar.h>],
338 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
339 has_wchar_minmax=yes, has_wchar_minmax=no)
340 AC_MSG_RESULT($has_wchar_minmax)
342 # Test wchar.h for WEOF, which is what we use to determine whether
343 # to specialize for char_traits<wchar_t> or not.
344 AC_MSG_CHECKING([for WEOF])
347 #include <stddef.h>],
349 has_weof=yes, has_weof=no)
350 AC_MSG_RESULT($has_weof)
352 # Tests for wide character functions used in char_traits<wchar_t>.
354 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
357 # Checks for names injected into std:: by the c_std headers.
358 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
359 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
360 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
361 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
362 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
363 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
366 AC_MSG_CHECKING([for ISO C99 wchar_t support])
367 if test x"$has_weof" = xyes &&
368 test x"$has_wchar_minmax" = xyes &&
369 test x"$ac_wfuncs" = xyes;
371 ac_isoC99_wchar_t=yes
375 AC_MSG_RESULT($ac_isoC99_wchar_t)
377 # Use iconv for wchar_t to char conversions. As such, check for
378 # X/Open Portability Guide, version 2 features (XPG2).
379 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
380 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
382 # Check for existence of libiconv.a providing XPG2 wchar_t support.
383 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
385 LIBS="$LIBS $libiconv"
387 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
388 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
392 AC_MSG_CHECKING([for XPG2 wchar_t support])
393 if test x"$ac_has_iconv_h" = xyes &&
394 test x"$ac_has_langinfo_h" = xyes &&
395 test x"$ac_XPG2funcs" = xyes;
401 AC_MSG_RESULT($ac_XPG2_wchar_t)
403 # At the moment, only enable wchar_t specializations if all the
404 # above support is present.
405 if test x"$ac_isoC99_wchar_t" = xyes &&
406 test x"$ac_XPG2_wchar_t" = xyes;
408 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
412 AC_MSG_CHECKING([for enabled wchar_t specializations])
413 AC_MSG_RESULT($enable_wchar_t)
418 dnl Check for headers for, and arguments to, the setrlimit() function.
419 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
422 dnl _GLIBCXX_MEM_LIMITS if we can set artificial limits on memory
423 dnl various HAVE_MEMLIMIT_* for individual limit names
425 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT_ancilliary, [
428 #include <sys/time.h>
429 #include <sys/resource.h>
431 [ int f = RLIMIT_$1 ; ],
432 [glibcxx_mresult=1], [glibcxx_mresult=0])
433 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcxx_mresult,
434 [Only used in build directory testsuite_hooks.h.])
437 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT, [
438 setrlimit_have_headers=yes
439 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
441 [setrlimit_have_headers=no])
442 # If don't have the headers, then we can't run the tests now, and we
443 # won't be seeing any of these during testsuite compilation.
444 if test $setrlimit_have_headers = yes; then
445 # Can't do these in a loop, else the resulting syntax is wrong.
446 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
447 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
448 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
449 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
451 # Check for rlimit, setrlimit.
452 AC_CACHE_VAL(ac_setrlimit, [
455 #include <sys/time.h>
456 #include <sys/resource.h>
460 [ac_setrlimit=yes], [ac_setrlimit=no])
464 AC_MSG_CHECKING([for testsuite memory limit support])
465 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
467 AC_DEFINE(_GLIBCXX_MEM_LIMITS)
471 AC_MSG_RESULT($ac_mem_limits)
476 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
477 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
479 AC_DEFUN(GLIBCXX_CHECK_S_ISREG_OR_S_IFREG, [
480 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
482 [#include <sys/stat.h>],
485 S_ISREG(buffer.st_mode);],
486 [glibcxx_cv_S_ISREG=yes],
487 [glibcxx_cv_S_ISREG=no])
489 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
491 [#include <sys/stat.h>],
494 S_IFREG & buffer.st_mode;],
495 [glibcxx_cv_S_IFREG=yes],
496 [glibcxx_cv_S_IFREG=no])
498 if test $glibcxx_cv_S_ISREG = yes; then
499 AC_DEFINE(HAVE_S_ISREG)
500 elif test $glibcxx_cv_S_IFREG = yes; then
501 AC_DEFINE(HAVE_S_IFREG)
507 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
509 AC_DEFUN(GLIBCXX_CHECK_POLL, [
510 AC_CACHE_VAL(glibcxx_cv_POLL, [
513 [struct pollfd pfd[1];
514 pfd[0].events = POLLIN;
516 [glibcxx_cv_POLL=yes],
517 [glibcxx_cv_POLL=no])
519 if test $glibcxx_cv_POLL = yes; then
526 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
528 AC_DEFUN(GLIBCXX_CHECK_WRITEV, [
529 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
531 [#include <sys/uio.h>],
532 [struct iovec iov[2];
534 [glibcxx_cv_WRITEV=yes],
535 [glibcxx_cv_WRITEV=no])
537 if test $glibcxx_cv_WRITEV = yes; then
538 AC_DEFINE(HAVE_WRITEV)
544 dnl Does any necessary configuration of the testsuite directory. Generates
545 dnl the testsuite_hooks.h header.
547 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
550 dnl enable_abi_check / GLIBCXX_TEST_ABI
554 AC_DEFUN(GLIBCXX_CONFIGURE_TESTSUITE, [
555 if $GLIBCXX_IS_NATIVE; then
556 # Do checks for memory limit functions.
557 GLIBCXX_CHECK_SETRLIMIT
559 # Look for setenv, so that extended locale tests can be performed.
560 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
563 # Export file names for ABI checking.
564 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
565 AC_SUBST(baseline_dir)
567 # Determine if checking the ABI is desirable.
568 if test $enable_symvers = no; then
573 enable_abi_check=no ;;
575 enable_abi_check=yes ;;
579 AM_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
580 AM_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
585 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
589 dnl TOPLEVEL_INCLUDES
591 dnl LIBSUPCXX_INCLUDES
593 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
594 # Root level of the build directory include sources.
595 GLIBCXX_INCLUDES="-I$glibcxx_builddir/include/$host_alias -I$glibcxx_builddir/include"
597 # Passed down for canadian crosses.
598 if test $CANADIAN = yes; then
599 TOPLEVEL_INCLUDES='-I${includedir}'
602 LIBMATH_INCLUDES='-I${glibcxx_srcdir}/libmath'
604 LIBSUPCXX_INCLUDES='-I${glibcxx_srcdir}/libsupc++'
606 # Now, export this to all the little Makefiles....
607 AC_SUBST(GLIBCXX_INCLUDES)
608 AC_SUBST(TOPLEVEL_INCLUDES)
609 AC_SUBST(LIBMATH_INCLUDES)
610 AC_SUBST(LIBSUPCXX_INCLUDES)
615 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
616 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
619 dnl OPTIMIZE_CXXFLAGS
622 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
623 # Optimization flags that are probably a good idea for thrill-seekers. Just
624 # uncomment the lines below and make, everything else is ready to go...
625 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
627 AC_SUBST(OPTIMIZE_CXXFLAGS)
629 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings'
635 dnl All installation directory information is determined here.
639 dnl glibcxx_prefixdir
640 dnl glibcxx_toolexecdir
641 dnl glibcxx_toolexeclibdir
643 dnl Assumes cross_compiling bits already done, and with_cross_host in
646 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
647 glibcxx_toolexecdir=no
648 glibcxx_toolexeclibdir=no
649 glibcxx_prefixdir=$prefix
651 AC_MSG_CHECKING([for gxx-include-dir])
652 AC_ARG_WITH([gxx-include-dir],
653 AC_HELP_STRING([--with-gxx-include-dir=DIR],
654 [installation directory for include files]),
656 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
657 no) gxx_include_dir=no ;;
658 *) gxx_include_dir=$withval ;;
660 [gxx_include_dir=no])
661 AC_MSG_RESULT($gxx_include_dir)
663 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
664 AC_ARG_ENABLE([version-specific-runtime-libs],
665 AC_HELP_STRING([--enable-version-specific-runtime-libs],
666 [Specify that runtime libraries should be installed in a compiler-specific directory]),
667 [case "$enableval" in
668 yes) version_specific_libs=yes ;;
669 no) version_specific_libs=no ;;
670 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
672 [version_specific_libs=no])
673 AC_MSG_RESULT($version_specific_libs)
675 # Default case for install directory for include files.
676 if test $version_specific_libs = no && test $gxx_include_dir = no; then
677 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
680 # Version-specific runtime libs processing.
681 if test $version_specific_libs = yes; then
682 # Need the gcc compiler version to know where to install libraries
683 # and header files if --enable-version-specific-runtime-libs option
685 if test x"$gxx_include_dir" = x"no"; then
686 gxx_include_dir='$libdir/gcc-lib/$host_alias/'$gcc_version/include/c++
688 glibcxx_toolexecdir='$libdir/gcc-lib/$host_alias'
689 glibcxx_toolexeclibdir='$toolexecdir/'$gcc_version'$(MULTISUBDIR)'
692 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
693 # Install a library built with a cross compiler in tooldir, not libdir.
694 if test x"$glibcxx_toolexecdir" = x"no"; then
695 if test -n "$with_cross_host" &&
696 test x"$with_cross_host" != x"no"; then
697 glibcxx_toolexecdir='$(exec_prefix)/$(host_alias)'
698 glibcxx_toolexeclibdir='$(toolexecdir)/lib'
700 glibcxx_toolexecdir='$(libdir)/gcc-lib/$(host_alias)'
701 glibcxx_toolexeclibdir='$(libdir)'
703 multi_os_directory=`$CC -print-multi-os-directory`
704 case $multi_os_directory in
705 .) ;; # Avoid trailing /.
706 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
710 AC_MSG_CHECKING([for install location])
711 AC_MSG_RESULT($gxx_include_dir)
713 AC_SUBST(glibcxx_prefixdir)
714 AC_SUBST(gxx_include_dir)
715 AC_SUBST(glibcxx_toolexecdir)
716 AC_SUBST(glibcxx_toolexeclibdir)
722 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
723 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
724 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
726 dnl See docs/html/17_intro/configury.html#enable for documentation.
728 m4_define([GLIBCXX_ENABLE],[dnl
729 m4_define([_g_switch],[--enable-$1])dnl
730 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
731 AC_ARG_ENABLE($1,_g_help,
736 m4_bpatsubst([$5],[permit ])) ;;
737 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
738 dnl Idea for future: generate a URL pointing to
739 dnl "onlinedocs/configopts.html#whatever"
746 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
750 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
751 m4_undefine([_g_switch])dnl
752 m4_undefine([_g_help])dnl
757 dnl Check for ISO/IEC 9899:1999 "C99" support.
759 dnl --enable-c99 defines _GLIBCXX_USE_C99
760 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
761 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
762 dnl Where DEFAULT is either `yes' or `no'.
763 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
765 AC_DEFUN(GLIBCXX_ENABLE_C99, [
766 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
771 # Check for the existence of <math.h> functions used if C99 is enabled.
773 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
774 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
775 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
776 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
777 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
778 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
779 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
780 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
781 AC_TRY_COMPILE([#include <math.h>],
782 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
783 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
784 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
785 AC_TRY_COMPILE([#include <math.h>],
786 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
787 AC_TRY_COMPILE([#include <math.h>],
788 [isunordered(0.0,0.0);],, [ac_c99_math=no])
789 AC_MSG_RESULT($ac_c99_math)
791 # Check for the existence in <stdio.h> of vscanf, et. al.
793 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
794 AC_TRY_COMPILE([#include <stdio.h>],
795 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
796 AC_TRY_COMPILE([#include <stdio.h>
798 void foo(char* fmt, ...)
799 {va_list args; va_start(args, fmt);
800 vfscanf(stderr, "%i", args);}],
801 [],, [ac_c99_stdio=no])
802 AC_TRY_COMPILE([#include <stdio.h>
804 void foo(char* fmt, ...)
805 {va_list args; va_start(args, fmt);
806 vscanf("%i", args);}],
807 [],, [ac_c99_stdio=no])
808 AC_TRY_COMPILE([#include <stdio.h>
810 void foo(char* fmt, ...)
811 {va_list args; va_start(args, fmt);
812 vsnprintf(fmt, 0, "%i", args);}],
813 [],, [ac_c99_stdio=no])
814 AC_TRY_COMPILE([#include <stdio.h>
816 void foo(char* fmt, ...)
817 {va_list args; va_start(args, fmt);
818 vsscanf(fmt, "%i", args);}],
819 [],, [ac_c99_stdio=no])
820 AC_MSG_RESULT($ac_c99_stdio)
822 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
824 AC_MSG_CHECKING([for lldiv_t declaration])
825 AC_CACHE_VAL(ac_c99_lldiv_t, [
826 AC_TRY_COMPILE([#include <stdlib.h>],
828 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
830 AC_MSG_RESULT($ac_c99_lldiv_t)
832 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
833 AC_TRY_COMPILE([#include <stdlib.h>],
834 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
835 AC_TRY_COMPILE([#include <stdlib.h>],
836 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
837 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
838 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
839 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
840 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
841 if test x"$ac_c99_lldiv_t" = x"no"; then
844 AC_MSG_RESULT($ac_c99_stdlib)
846 # Check for the existence of <wchar.h> functions used if C99 is enabled.
847 # XXX the wchar.h checks should be rolled into the general C99 bits.
849 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
850 AC_TRY_COMPILE([#include <wchar.h>],
851 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
852 AC_TRY_COMPILE([#include <wchar.h>],
853 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
854 AC_TRY_COMPILE([#include <wchar.h>],
855 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
856 AC_MSG_RESULT($ac_c99_wchar)
858 AC_MSG_CHECKING([for enabled ISO C99 support])
859 if test x"$ac_c99_math" = x"no" ||
860 test x"$ac_c99_stdio" = x"no" ||
861 test x"$ac_c99_stdlib" = x"no" ||
862 test x"$ac_c99_wchar" = x"no"; then
865 AC_MSG_RESULT($enable_c99)
867 # Option parsed, now set things appropriately
868 if test x"$enable_c99" = x"yes"; then
869 AC_DEFINE(_GLIBCXX_USE_C99)
877 dnl Check for what type of C headers to use.
879 dnl --enable-cheaders= [does stuff].
880 dnl --disable-cheaders [does not do anything, really].
881 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
882 dnl Where DEFAULT is either `c' or `c_std'.
884 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
885 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
886 [construct "C" headers for g++], [permit c|c_std])
887 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
889 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
891 AC_SUBST(C_INCLUDE_DIR)
892 AM_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
893 AM_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
894 AM_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
899 dnl Check for which locale library to use. The choice is mapped to
900 dnl a subdirectory of config/locale.
902 dnl Default is generic.
904 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
905 AC_MSG_CHECKING([for C locale to use])
906 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
907 [use MODEL for target locale package],
908 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
910 # If they didn't use this option switch, or if they specified --enable
911 # with no specific model, we'll have to look for one. If they
912 # specified --disable (???), do likewise.
913 if test $enable_clocale = no || test $enable_clocale = yes; then
917 # Either a known package, or "auto"
918 enable_clocale_flag=$enable_clocale
920 # Probe for locale support if no specific model is specified.
921 # Default to "generic".
922 if test $enable_clocale_flag = auto; then
923 case x${target_os} in
925 AC_EGREP_CPP([_GLIBCXX_ok], [
926 #include <features.h>
927 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
930 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
932 # Test for bugs early in glibc-2.2.x series
933 if test x$enable_clocale_flag = xgnu; then
935 #define _GNU_SOURCE 1
938 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
939 extern __typeof(newlocale) __newlocale;
940 extern __typeof(duplocale) __duplocale;
941 extern __typeof(strcoll_l) __strcoll_l;
945 const char __one[] = "Äuglein Augmen";
946 const char __two[] = "Äuglein";
951 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
952 loc_dup = __duplocale(loc);
953 i = __strcoll_l(__one, __two, loc);
954 j = __strcoll_l(__one, __two, loc_dup);
958 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
959 [enable_clocale_flag=generic])
962 # ... at some point put __strxfrm_l tests in as well.
965 enable_clocale_flag=generic
970 # Deal with gettext issues. Default to not using it (=no) until we detect
971 # support for it later. Let the user turn it off via --e/d, but let that
972 # default to on for easier handling.
975 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
979 # Set configure bits for specified locale package
980 case ${enable_clocale_flag} in
982 AC_MSG_RESULT(generic)
984 CLOCALE_H=config/locale/generic/c_locale.h
985 CLOCALE_CC=config/locale/generic/c_locale.cc
986 CCODECVT_H=config/locale/generic/codecvt_specializations.h
987 CCODECVT_CC=config/locale/generic/codecvt_members.cc
988 CCOLLATE_CC=config/locale/generic/collate_members.cc
989 CCTYPE_CC=config/locale/generic/ctype_members.cc
990 CMESSAGES_H=config/locale/generic/messages_members.h
991 CMESSAGES_CC=config/locale/generic/messages_members.cc
992 CMONEY_CC=config/locale/generic/monetary_members.cc
993 CNUMERIC_CC=config/locale/generic/numeric_members.cc
994 CTIME_H=config/locale/generic/time_members.h
995 CTIME_CC=config/locale/generic/time_members.cc
996 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1001 # Declare intention to use gettext, and add support for specific
1003 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1006 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1007 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1008 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1011 # Export the build objects.
1012 for ling in $ALL_LINGUAS; do \
1013 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1014 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1016 AC_SUBST(glibcxx_MOFILES)
1017 AC_SUBST(glibcxx_POFILES)
1019 CLOCALE_H=config/locale/gnu/c_locale.h
1020 CLOCALE_CC=config/locale/gnu/c_locale.cc
1021 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1022 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1023 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1024 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1025 CMESSAGES_H=config/locale/gnu/messages_members.h
1026 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1027 CMONEY_CC=config/locale/gnu/monetary_members.cc
1028 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1029 CTIME_H=config/locale/gnu/time_members.h
1030 CTIME_CC=config/locale/gnu/time_members.cc
1031 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1034 AC_MSG_RESULT(IEEE 1003.1)
1036 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1037 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1038 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1039 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1040 CCOLLATE_CC=config/locale/generic/collate_members.cc
1041 CCTYPE_CC=config/locale/generic/ctype_members.cc
1042 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1043 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1044 CMONEY_CC=config/locale/generic/monetary_members.cc
1045 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1046 CTIME_H=config/locale/generic/time_members.h
1047 CTIME_CC=config/locale/generic/time_members.cc
1048 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1052 # This is where the testsuite looks for locale catalogs, using the
1053 # -DLOCALEDIR define during testsuite compilation.
1054 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1055 AC_SUBST(glibcxx_localedir)
1057 # A standalone libintl (e.g., GNU libintl) may be in use.
1058 if test $USE_NLS = yes; then
1059 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1060 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1062 if test $USE_NLS = yes; then
1063 AC_DEFINE(_GLIBCXX_USE_NLS)
1068 AC_SUBST(CCODECVT_H)
1069 AC_SUBST(CMESSAGES_H)
1070 AC_SUBST(CCODECVT_CC)
1071 AC_SUBST(CCOLLATE_CC)
1073 AC_SUBST(CMESSAGES_CC)
1075 AC_SUBST(CNUMERIC_CC)
1078 AC_SUBST(CLOCALE_CC)
1079 AC_SUBST(CLOCALE_INTERNAL_H)
1084 dnl Check for whether the Boost-derived checks should be turned on.
1086 dnl --enable-concept-checks turns them on.
1087 dnl --disable-concept-checks leaves them off.
1088 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1089 dnl Where DEFAULT is either `yes' or `no'.
1091 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1092 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1093 if test $enable_concept_checks = yes; then
1094 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1100 dnl Check for which I/O library to use: stdio, or something specific.
1102 dnl Default is stdio.
1104 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1105 AC_MSG_CHECKING([for underlying I/O to use])
1106 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1107 [use target-specific I/O package], [permit stdio])
1109 # Now that libio has been removed, you can have any color you want as long
1110 # as it's black. This is one big no-op until other packages are added, but
1111 # showing the framework never hurts.
1112 case ${enable_cstdio} in
1114 CSTDIO_H=config/io/c_io_stdio.h
1115 BASIC_FILE_H=config/io/basic_file_stdio.h
1116 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1117 AC_MSG_RESULT(stdio)
1121 dnl Set directory for fpos.h
1122 FPOS_H=$fpos_include_dir
1126 AC_SUBST(BASIC_FILE_H)
1127 AC_SUBST(BASIC_FILE_CC)
1132 dnl Check for "unusual" flags to pass to the compiler while building.
1134 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1135 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1136 dnl --disable-cxx-flags passes nothing.
1137 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1138 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1139 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1140 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1141 dnl If "default flags" is an empty string, the effect is the same
1142 dnl as --disable or --enable=no.
1144 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1145 AC_MSG_CHECKING([for extra compiler flags for building])
1146 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1147 [pass compiler FLAGS when building library],
1148 [case "x$enable_cxx_flags" in
1149 xno | x) enable_cxx_flags= ;;
1151 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1154 # Run through flags (either default or command-line) and set anything
1155 # extra (e.g., #defines) that must accompany particular g++ options.
1156 if test -n "$enable_cxx_flags"; then
1157 for f in $enable_cxx_flags; do
1161 *) # and we're trying to pass /what/ exactly?
1162 AC_MSG_ERROR([compiler flags start with a -]) ;;
1167 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1168 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1169 AC_SUBST(EXTRA_CXX_FLAGS)
1174 dnl Check for wide character support. Has the same effect as the option
1175 dnl in gcc's configure, but in a form that autoconf can mess with.
1177 dnl --enable-c-mbchar requests all the wchar_t stuff.
1178 dnl --disable-c-mbchar doesn't.
1179 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1180 dnl Where DEFAULT is either `yes' or `no'.
1182 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1183 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1184 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1189 dnl Check to see if debugging libraries are to be built.
1191 dnl --enable-libstdcxx-debug
1192 dnl builds a separate set of debugging libraries in addition to the
1193 dnl normal (shared, static) libstdc++ binaries.
1195 dnl --disable-libstdcxx-debug
1196 dnl builds only one (non-debug) version of libstdc++.
1198 dnl --enable-libstdcxx-debug-flags=FLAGS
1199 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1201 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1202 dnl Where DEFAULT is either `yes' or `no'.
1204 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1205 AC_MSG_CHECKING([for additional debug build])
1206 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1207 AC_MSG_RESULT($enable_libstdcxx_debug)
1208 AM_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1213 dnl Check for explicit debug flags.
1215 dnl --enable-libstdcxx-debug-flags='-O1'
1216 dnl is a general method for passing flags to be used when
1217 dnl building debug libraries with --enable-debug.
1219 dnl --disable-libstdcxx-debug-flags does nothing.
1220 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1221 dnl If "default flags" is an empty string, the effect is the same
1222 dnl as --disable or --enable=no.
1224 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1225 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1226 [pass compiler FLAGS when building debug library],
1227 [case "x$enable_libstdcxx_debug_flags" in
1228 xno | x) enable_libstdcxx_debug_flags= ;;
1230 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1233 # Option parsed, now set things appropriately
1234 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1235 AC_SUBST(DEBUG_FLAGS)
1237 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1242 dnl Check for libunwind exception handling support. If enabled, then
1243 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1244 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1245 dnl libunwind instead of libgcc, and that libstdc++ has a dependency
1246 dnl on libunwind as well as libgcc.
1248 dnl --enable-libunwind-exceptions forces the use of libunwind.
1249 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1254 AC_DEFUN(GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS, [
1255 AC_MSG_CHECKING([for use of libunwind])
1256 GLIBCXX_ENABLE(libunwind-exceptions,no,,
1257 [force use of libunwind for exceptions])
1258 AC_MSG_RESULT($use_libunwind_exceptions)
1259 if test $enable_libunwind_exceptions = yes; then
1260 LIBUNWIND_FLAG="-lunwind"
1264 AC_SUBST(LIBUNWIND_FLAG)
1269 dnl Check for template specializations for the 'long long' type extension.
1270 dnl The result determines only whether 'long long' I/O is enabled; things
1271 dnl like numeric_limits<> specializations are always available.
1273 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1274 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1275 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1276 dnl Where DEFAULT is either `yes' or `no'.
1277 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1279 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1280 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1285 AC_MSG_CHECKING([for enabled long long I/O support])
1286 # iostreams require strtoll, strtoull to compile
1287 AC_TRY_COMPILE([#include <stdlib.h>],
1288 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1289 AC_TRY_COMPILE([#include <stdlib.h>],
1290 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1292 # Option parsed, now set things appropriately
1293 if test $enable_long_long = yes; then
1294 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1296 AC_MSG_RESULT($enable_long_long)
1303 dnl Check to see if building and using a C++ precompiled header can be done.
1305 dnl --enable-libstdcxx-pch=yes
1306 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1307 dnl may work, after some light-hearted attempts to puzzle out compiler
1308 dnl support, flip bits on in include/Makefile.am
1310 dnl --disable-libstdcxx-pch
1311 dnl turns off attempts to use or build stdc++.h.gch.
1314 dnl glibcxx_PCHFLAGS
1316 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1317 AC_MSG_CHECKING([for enabled PCH])
1318 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1319 AC_MSG_RESULT([$enable_libstdcxx_pch])
1321 if test $enable_libstdcxx_pch = yes; then
1322 AC_CACHE_CHECK([for compiler with PCH support],
1323 [glibcxx_cv_prog_CXX_pch],
1324 [ac_save_CXXFLAGS="$CXXFLAGS"
1325 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1328 echo '#include <math.h>' > conftest.h
1329 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1330 -o conftest.h.gch 1>&5 2>&1 &&
1331 echo '#error "pch failed"' > conftest.h &&
1332 echo '#include "conftest.h"' > conftest.cc &&
1333 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1335 glibcxx_cv_prog_CXX_pch=yes
1337 glibcxx_cv_prog_CXX_pch=no
1340 CXXFLAGS=$ac_save_CXXFLAGS
1343 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1346 AM_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1347 if test $enable_libstdcxx_pch = yes; then
1348 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1352 AC_SUBST(glibcxx_PCHFLAGS)
1357 dnl Check for exception handling support. If an explicit enable/disable
1358 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1359 dnl target may or may not support call frame exceptions.
1361 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1362 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1363 dnl Neither one forces an attempt at detection.
1366 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1368 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1369 AC_MSG_CHECKING([for exception model to use])
1372 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1373 [force use of builtin_setjmp for exceptions],
1374 [permit yes|no|auto])
1376 if test $enable_sjlj_exceptions = auto; then
1377 # Botheration. Now we've got to detect the exception model. Link tests
1378 # against libgcc.a are problematic since we've not been given proper -L
1379 # bits for single-tree newlib and libgloss.
1381 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1382 cat > conftest.$ac_ext << EOF
1383 [#]line __oline__ "configure"
1392 old_CXXFLAGS="$CXXFLAGS"
1394 if AC_TRY_EVAL(ac_compile); then
1395 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1396 enable_sjlj_exceptions=yes
1397 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1398 enable_sjlj_exceptions=no
1401 CXXFLAGS="$old_CXXFLAGS"
1405 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1406 # to two different models.
1407 case $enable_sjlj_exceptions in
1409 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1410 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1411 ac_exception_model_name=sjlj
1414 ac_exception_model_name="call frame"
1417 AC_MSG_ERROR([unable to detect exception model])
1421 AC_MSG_RESULT($ac_exception_model_name)
1426 dnl Add version tags to symbols in shared library (or not), additionally
1427 dnl marking other symbols as private/local (or not).
1429 dnl --enable-symvers=style adds a version script to the linker call when
1430 dnl creating the shared library. The choice of version script is
1431 dnl controlled by 'style'.
1432 dnl --disable-symvers does not.
1433 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1434 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1435 dnl choose a default style based on linker characteristics. Passing
1436 dnl 'no' disables versioning.
1438 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1440 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1441 [enables symbol versioning of the shared library],
1442 [permit yes|no|gnu])
1444 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1445 # don't know enough about $LD to do tricks...
1446 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1447 # FIXME The following test is too strict, in theory.
1448 if test $enable_shared = no ||
1450 test x$glibcxx_gnu_ld_version = x; then
1454 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1455 if test $enable_symvers != no; then
1456 AC_MSG_CHECKING([for shared libgcc])
1457 ac_save_CFLAGS="$CFLAGS"
1459 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1460 CFLAGS="$ac_save_CFLAGS"
1461 AC_MSG_RESULT($glibcxx_shared_libgcc)
1464 # For GNU ld, we need at least this version. The format is described in
1465 # GLIBCXX_CHECK_LINKER_FEATURES above.
1466 glibcxx_min_gnu_ld_version=21400
1467 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1469 # Check to see if unspecified "yes" value can win, given results above.
1470 # Change "yes" into either "no" or a style name.
1471 if test $enable_symvers = yes; then
1472 if test $with_gnu_ld = yes &&
1473 test $glibcxx_shared_libgcc = yes;
1475 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1478 # The right tools, the right setup, but too old. Fallbacks?
1479 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1480 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1481 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1482 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1483 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1484 # Globbing fix is present, proper block support is not.
1485 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1486 dnl enable_symvers=???
1487 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1491 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1497 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1498 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1499 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1500 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1505 # Everything parsed; figure out what file to use.
1506 case $enable_symvers in
1508 SYMVER_MAP=config/linker-map.dummy
1511 SYMVER_MAP=config/linker-map.gnu
1512 AC_DEFINE(_GLIBCXX_SYMVER)
1516 AC_SUBST(SYMVER_MAP)
1517 AC_SUBST(port_specific_symbol_files)
1518 AM_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1519 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1524 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1525 dnl We must stage the required headers so that they will be installed
1526 dnl with the library (unlike libgcc, the STL implementation is provided
1527 dnl solely within headers). Since we must not inject random user-space
1528 dnl macro names into user-provided C++ code, we first stage into <file>-in
1529 dnl and process to <file> with an output command. The reason for a two-
1530 dnl stage process here is to correctly handle $srcdir!=$objdir without
1531 dnl having to write complex code (the sed commands to clean the macro
1532 dnl namespace are complex and fragile enough as it is). We must also
1533 dnl add a relative path so that -I- is supported properly.
1536 dnl glibcxx_thread_h
1539 dnl HAVE_GTHR_DEFAULT
1540 dnl _GLIBCXX_SUPPORTS_WEAK
1542 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1543 AC_MSG_CHECKING([for thread model used by GCC])
1544 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1545 AC_MSG_RESULT([$target_thread_file])
1547 if test $target_thread_file != single; then
1548 AC_DEFINE(HAVE_GTHR_DEFAULT)
1549 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1552 glibcxx_thread_h=gthr-$target_thread_file.h
1553 AC_SUBST(glibcxx_thread_h)
1557 # Check whether LC_MESSAGES is available in <locale.h>.
1558 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1560 # This file file be copied and used freely without restrictions. It can
1561 # be used in projects which are not available under the GNU Public License
1562 # but which still want to provide support for the GNU gettext functionality.
1563 # Please note that the actual code is *not* freely available.
1566 AC_DEFUN(AC_LC_MESSAGES, [
1567 AC_CHECK_HEADER(locale.h, [
1568 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1569 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1570 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1571 if test $ac_cv_val_LC_MESSAGES = yes; then
1572 AC_DEFINE(HAVE_LC_MESSAGES)
1578 sinclude([../libtool.m4])
1579 dnl The lines below arrange for aclocal not to bring an installed
1580 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1581 dnl add a definition of LIBTOOL to Makefile.in.
1582 ifelse(,,,[AC_SUBST(LIBTOOL)
1583 AC_DEFUN([AM_PROG_LIBTOOL])
1584 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1585 AC_DEFUN([AC_PROG_LD])
1588 dnl vim:et:ts=2:sw=2