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=${glibcxx_srcdir}/..
73 AC_SUBST(glibcxx_builddir)
74 AC_SUBST(glibcxx_srcdir)
75 AC_SUBST(toplevel_srcdir)
77 # We use these options to decide which functions to include. They are
78 # set from the top level.
79 AC_ARG_WITH([target-subdir],
80 AC_HELP_STRING([--with-target-subdir=SUBDIR],
81 [configuring in a subdirectory]))
83 AC_ARG_WITH([cross-host],
84 AC_HELP_STRING([--with-cross-host=HOST],
85 [configuring with a cross compiler]))
88 AC_HELP_STRING([--with-newlib],
89 [assume newlib as a system C library]))
91 # We're almost certainly being configured before anything else which uses
92 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
93 # we not cache the value of CXX that we "discover" here, because it's set
94 # to something unique for us and libjava. Other target libraries need to
95 # find CXX for themselves. We yank the rug out from under the normal AC_*
96 # process by sneakily renaming the cache variable. This also lets us debug
97 # the value of "our" CXX in postmortems.
99 # We must also force CXX to /not/ be a precious variable, otherwise the
100 # wrong (non-multilib-adjusted) value will be used in multilibs. This
101 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
102 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
103 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
105 # -fno-builtin must be present here so that a non-conflicting form of
106 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
108 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
109 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
110 m4_define([_AC_ARG_VAR_PRECIOUS],[])
111 save_CXXFLAGS="$CXXFLAGS"
112 CXXFLAGS="$CXXFLAGS -fno-builtin"
115 CXXFLAGS="$save_CXXFLAGS"
116 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
120 # For directory versioning (e.g., headers) and other variables.
121 AC_MSG_CHECKING([for GCC version number])
122 gcc_version=`$CXX -dumpversion`
123 AC_MSG_RESULT($gcc_version)
125 # For some reason, gettext needs this.
128 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
129 # available). Uncomment the next line to force a particular method.
133 AC_CHECK_TOOL(AS, as)
134 AC_CHECK_TOOL(AR, ar)
135 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
139 # Set up safe default values for all subsequent AM_CONDITIONAL tests.
142 #enable_libstdcxx_debug=no
143 #enable_libstdcxx_pch=no
149 # Find platform-specific directories containing configuration info.
150 # Also possibly modify flags used elsewhere, as needed by the platform.
155 m4_include([linkage.m4])
159 dnl Tests for newer compiler features, or features that are present in newer
160 dnl compiler versions but not older compiler versions still in use, should
164 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
165 dnl new inlining code or the new system_header pragma will die on -Werror.
166 dnl Leave it out by default and use maint-mode to use it.
167 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
168 dnl compiler supports it and the user has not requested debug mode.
170 AC_DEFUN(GLIBCXX_CHECK_COMPILER_FEATURES, [
171 # All these tests are for C++; save the language and the compiler flags.
172 # The CXXFLAGS thing is suspicious, but based on similar bits previously
173 # found in GLIBCXX_CONFIGURE.
176 ac_test_CXXFLAGS="${CXXFLAGS+set}"
177 ac_save_CXXFLAGS="$CXXFLAGS"
179 # Check for maintainer-mode bits.
180 if test x"$USE_MAINTAINER_MODE" = xno; then
186 # Check for -ffunction-sections -fdata-sections
187 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
188 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
189 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
190 if test "$ac_test_CXXFLAGS" = set; then
191 CXXFLAGS="$ac_save_CXXFLAGS"
193 # this is the suspicious part
196 if test x"$ac_fdsections" = x"yes"; then
197 SECTION_FLAGS='-ffunction-sections -fdata-sections'
199 AC_MSG_RESULT($ac_fdsections)
203 AC_SUBST(SECTION_FLAGS)
208 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
209 dnl the native linker is in use, all variables will be defined to something
210 dnl safe (like an empty string).
213 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
214 dnl OPT_LDFLAGS='-Wl,-O1' if possible
215 dnl LD (as a side effect of testing)
218 dnl glibcxx_gnu_ld_version (possibly)
220 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
221 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
223 AC_DEFUN(GLIBCXX_CHECK_LINKER_FEATURES, [
224 # If we're not using GNU ld, then there's no point in even trying these
225 # tests. Check for that first. We should have already tested for gld
226 # by now (in libtool), but require it now just to be safe...
227 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
228 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
229 AC_REQUIRE([AC_PROG_LD])
230 AC_REQUIRE([AC_PROG_AWK])
232 # The name set by libtool depends on the version of libtool. Shame on us
233 # for depending on an impl detail, but c'est la vie. Older versions used
234 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
235 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
236 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
237 # set (hence we're using an older libtool), then set it.
238 if test x${with_gnu_ld+set} != xset; then
239 if test x${ac_cv_prog_gnu_ld+set} != xset; then
240 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
243 with_gnu_ld=$ac_cv_prog_gnu_ld
247 # Start by getting the version number. I think the libtool test already
248 # does some of this, but throws away the result.
250 ldver=`$LD --version 2>/dev/null | head -1 | \
251 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
253 glibcxx_gnu_ld_version=`echo $ldver | \
254 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
257 if test "$with_gnu_ld" = "notbroken"; then
258 # GNU ld it is! Joy and bunny rabbits!
260 # All these tests are for C++; save the language and the compiler flags.
261 # Need to do this so that g++ won't try to link in libstdc++
262 ac_test_CFLAGS="${CFLAGS+set}"
263 ac_save_CFLAGS="$CFLAGS"
264 CFLAGS='-x c++ -Wl,--gc-sections'
266 # Check for -Wl,--gc-sections
267 # XXX This test is broken at the moment, as symbols required for linking
268 # are now in libsupc++ (not built yet). In addition, this test has
269 # cored on solaris in the past. In addition, --gc-sections doesn't
270 # really work at the moment (keeps on discarding used sections, first
271 # .eh_frame and now some of the glibc sections for iconv).
272 # Bzzzzt. Thanks for playing, maybe next time.
273 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
281 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
282 if test "$ac_test_CFLAGS" = set; then
283 CFLAGS="$ac_save_CFLAGS"
285 # this is the suspicious part
288 if test "$ac_sectionLDflags" = "yes"; then
289 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
291 AC_MSG_RESULT($ac_sectionLDflags)
294 # Set linker optimization flags.
295 if test x"$with_gnu_ld" = x"yes"; then
296 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
299 AC_SUBST(SECTION_LDFLAGS)
300 AC_SUBST(OPT_LDFLAGS)
305 dnl Check to see if this target can enable the wchar_t parts.
306 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
307 dnl must have been previously checked.) By default, wide characters are
311 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
312 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
314 AC_DEFUN(GLIBCXX_CHECK_WCHAR_T_SUPPORT, [
315 # Test wchar.h for mbstate_t, which is needed for char_traits and
316 # others even if wchar_t support is not on.
317 AC_MSG_CHECKING([for mbstate_t])
318 AC_TRY_COMPILE([#include <wchar.h>],
319 [mbstate_t teststate;],
320 have_mbstate_t=yes, have_mbstate_t=no)
321 AC_MSG_RESULT($have_mbstate_t)
322 if test x"$have_mbstate_t" = xyes; then
323 AC_DEFINE(HAVE_MBSTATE_T)
326 # Sanity check for existence of ISO C99 headers for extended encoding.
327 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
328 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
330 # Only continue checking if the ISO C99 headers exist and support is on.
331 if test x"$ac_has_wchar_h" = xyes &&
332 test x"$ac_has_wctype_h" = xyes &&
333 test x"$enable_c_mbchar" != xno; then
335 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
336 # numeric_limits can instantiate type_traits<wchar_t>
337 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
338 AC_TRY_COMPILE([#include <wchar.h>],
339 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
340 has_wchar_minmax=yes, has_wchar_minmax=no)
341 AC_MSG_RESULT($has_wchar_minmax)
343 # Test wchar.h for WEOF, which is what we use to determine whether
344 # to specialize for char_traits<wchar_t> or not.
345 AC_MSG_CHECKING([for WEOF])
348 #include <stddef.h>],
350 has_weof=yes, has_weof=no)
351 AC_MSG_RESULT($has_weof)
353 # Tests for wide character functions used in char_traits<wchar_t>.
355 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
358 # Checks for names injected into std:: by the c_std headers.
359 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
360 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
361 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
362 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
363 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
364 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
367 AC_MSG_CHECKING([for ISO C99 wchar_t support])
368 if test x"$has_weof" = xyes &&
369 test x"$has_wchar_minmax" = xyes &&
370 test x"$ac_wfuncs" = xyes;
372 ac_isoC99_wchar_t=yes
376 AC_MSG_RESULT($ac_isoC99_wchar_t)
378 # Use iconv for wchar_t to char conversions. As such, check for
379 # X/Open Portability Guide, version 2 features (XPG2).
380 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
381 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
383 # Check for existence of libiconv.a providing XPG2 wchar_t support.
384 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
386 LIBS="$LIBS $libiconv"
388 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
389 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
393 AC_MSG_CHECKING([for XPG2 wchar_t support])
394 if test x"$ac_has_iconv_h" = xyes &&
395 test x"$ac_has_langinfo_h" = xyes &&
396 test x"$ac_XPG2funcs" = xyes;
402 AC_MSG_RESULT($ac_XPG2_wchar_t)
404 # At the moment, only enable wchar_t specializations if all the
405 # above support is present.
406 if test x"$ac_isoC99_wchar_t" = xyes &&
407 test x"$ac_XPG2_wchar_t" = xyes;
409 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
413 AC_MSG_CHECKING([for enabled wchar_t specializations])
414 AC_MSG_RESULT($enable_wchar_t)
419 dnl Check for headers for, and arguments to, the setrlimit() function.
420 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
423 dnl _GLIBCXX_MEM_LIMITS if we can set artificial limits on memory
424 dnl various HAVE_MEMLIMIT_* for individual limit names
426 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT_ancilliary, [
429 #include <sys/time.h>
430 #include <sys/resource.h>
432 [ int f = RLIMIT_$1 ; ],
433 [glibcxx_mresult=1], [glibcxx_mresult=0])
434 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcxx_mresult,
435 [Only used in build directory testsuite_hooks.h.])
438 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT, [
439 setrlimit_have_headers=yes
440 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
442 [setrlimit_have_headers=no])
443 # If don't have the headers, then we can't run the tests now, and we
444 # won't be seeing any of these during testsuite compilation.
445 if test $setrlimit_have_headers = yes; then
446 # Can't do these in a loop, else the resulting syntax is wrong.
447 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
448 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
449 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
450 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
452 # Check for rlimit, setrlimit.
453 AC_CACHE_VAL(ac_setrlimit, [
456 #include <sys/time.h>
457 #include <sys/resource.h>
461 [ac_setrlimit=yes], [ac_setrlimit=no])
465 AC_MSG_CHECKING([for testsuite memory limit support])
466 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
468 AC_DEFINE(_GLIBCXX_MEM_LIMITS)
472 AC_MSG_RESULT($ac_mem_limits)
477 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
478 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
480 AC_DEFUN(GLIBCXX_CHECK_S_ISREG_OR_S_IFREG, [
481 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
483 [#include <sys/stat.h>],
486 S_ISREG(buffer.st_mode);],
487 [glibcxx_cv_S_ISREG=yes],
488 [glibcxx_cv_S_ISREG=no])
490 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
492 [#include <sys/stat.h>],
495 S_IFREG & buffer.st_mode;],
496 [glibcxx_cv_S_IFREG=yes],
497 [glibcxx_cv_S_IFREG=no])
499 if test $glibcxx_cv_S_ISREG = yes; then
500 AC_DEFINE(HAVE_S_ISREG)
501 elif test $glibcxx_cv_S_IFREG = yes; then
502 AC_DEFINE(HAVE_S_IFREG)
508 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
510 AC_DEFUN(GLIBCXX_CHECK_POLL, [
511 AC_CACHE_VAL(glibcxx_cv_POLL, [
514 [struct pollfd pfd[1];
515 pfd[0].events = POLLIN;
517 [glibcxx_cv_POLL=yes],
518 [glibcxx_cv_POLL=no])
520 if test $glibcxx_cv_POLL = yes; then
527 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
529 AC_DEFUN(GLIBCXX_CHECK_WRITEV, [
530 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
532 [#include <sys/uio.h>],
533 [struct iovec iov[2];
535 [glibcxx_cv_WRITEV=yes],
536 [glibcxx_cv_WRITEV=no])
538 if test $glibcxx_cv_WRITEV = yes; then
539 AC_DEFINE(HAVE_WRITEV)
545 dnl Does any necessary configuration of the testsuite directory. Generates
546 dnl the testsuite_hooks.h header.
548 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
551 dnl enable_abi_check / GLIBCXX_TEST_ABI
555 AC_DEFUN(GLIBCXX_CONFIGURE_TESTSUITE, [
556 if $GLIBCXX_IS_NATIVE; then
557 # Do checks for memory limit functions.
558 GLIBCXX_CHECK_SETRLIMIT
560 # Look for setenv, so that extended locale tests can be performed.
561 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
564 # Export file names for ABI checking.
565 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
566 AC_SUBST(baseline_dir)
568 # Determine if checking the ABI is desirable.
569 if test $enable_symvers = no; then
574 enable_abi_check=no ;;
576 enable_abi_check=yes ;;
580 AM_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
581 AM_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
586 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
590 dnl TOPLEVEL_INCLUDES
592 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
593 # Used for every C++ compile we perform.
595 -I$glibcxx_builddir/include/$host_alias \
596 -I$glibcxx_builddir/include \
597 -I$glibcxx_srcdir/libsupc++"
599 # For Canadian crosses, pick this up too.
600 if test $CANADIAN = yes; then
601 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES '-I${includedir}'"
604 # Stuff in the actual top level. Currently only used by libsupc++ to
605 # get unwind* headers from the gcc dir.
606 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
607 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
609 # Now, export this to all the little Makefiles....
610 AC_SUBST(GLIBCXX_INCLUDES)
611 AC_SUBST(TOPLEVEL_INCLUDES)
616 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
617 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
620 dnl OPTIMIZE_CXXFLAGS
623 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
624 # Optimization flags that are probably a good idea for thrill-seekers. Just
625 # uncomment the lines below and make, everything else is ready to go...
626 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
628 AC_SUBST(OPTIMIZE_CXXFLAGS)
630 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings'
636 dnl All installation directory information is determined here.
640 dnl glibcxx_prefixdir
641 dnl glibcxx_toolexecdir
642 dnl glibcxx_toolexeclibdir
644 dnl Assumes cross_compiling bits already done, and with_cross_host in
647 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
648 glibcxx_toolexecdir=no
649 glibcxx_toolexeclibdir=no
650 glibcxx_prefixdir=$prefix
652 AC_MSG_CHECKING([for gxx-include-dir])
653 AC_ARG_WITH([gxx-include-dir],
654 AC_HELP_STRING([--with-gxx-include-dir=DIR],
655 [installation directory for include files]),
657 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
658 no) gxx_include_dir=no ;;
659 *) gxx_include_dir=$withval ;;
661 [gxx_include_dir=no])
662 AC_MSG_RESULT($gxx_include_dir)
664 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
665 AC_ARG_ENABLE([version-specific-runtime-libs],
666 AC_HELP_STRING([--enable-version-specific-runtime-libs],
667 [Specify that runtime libraries should be installed in a compiler-specific directory]),
668 [case "$enableval" in
669 yes) version_specific_libs=yes ;;
670 no) version_specific_libs=no ;;
671 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
673 [version_specific_libs=no])
674 AC_MSG_RESULT($version_specific_libs)
676 # Default case for install directory for include files.
677 if test $version_specific_libs = no && test $gxx_include_dir = no; then
678 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
681 # Version-specific runtime libs processing.
682 if test $version_specific_libs = yes; then
683 # Need the gcc compiler version to know where to install libraries
684 # and header files if --enable-version-specific-runtime-libs option
686 if test x"$gxx_include_dir" = x"no"; then
687 gxx_include_dir='${libdir}/gcc-lib/${host_alias}/'$gcc_version/include/c++
689 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
690 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
693 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
694 # Install a library built with a cross compiler in tooldir, not libdir.
695 if test x"$glibcxx_toolexecdir" = x"no"; then
696 if test -n "$with_cross_host" &&
697 test x"$with_cross_host" != x"no"; then
698 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
699 glibcxx_toolexeclibdir='${toolexecdir}/lib'
701 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
702 glibcxx_toolexeclibdir='${libdir}'
704 multi_os_directory=`$CXX -print-multi-os-directory`
705 case $multi_os_directory in
706 .) ;; # Avoid trailing /.
707 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
711 AC_MSG_CHECKING([for install location])
712 AC_MSG_RESULT($gxx_include_dir)
714 AC_SUBST(glibcxx_prefixdir)
715 AC_SUBST(gxx_include_dir)
716 AC_SUBST(glibcxx_toolexecdir)
717 AC_SUBST(glibcxx_toolexeclibdir)
723 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
724 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
725 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
727 dnl See docs/html/17_intro/configury.html#enable for documentation.
729 m4_define([GLIBCXX_ENABLE],[dnl
730 m4_define([_g_switch],[--enable-$1])dnl
731 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
732 AC_ARG_ENABLE($1,_g_help,
737 m4_bpatsubst([$5],[permit ])) ;;
738 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
739 dnl Idea for future: generate a URL pointing to
740 dnl "onlinedocs/configopts.html#whatever"
747 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
751 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
752 m4_undefine([_g_switch])dnl
753 m4_undefine([_g_help])dnl
758 dnl Check for ISO/IEC 9899:1999 "C99" support.
760 dnl --enable-c99 defines _GLIBCXX_USE_C99
761 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
762 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
763 dnl Where DEFAULT is either `yes' or `no'.
764 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
766 AC_DEFUN(GLIBCXX_ENABLE_C99, [
767 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
772 # Check for the existence of <math.h> functions used if C99 is enabled.
774 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
775 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
776 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
777 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
778 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
779 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
780 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
781 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
782 AC_TRY_COMPILE([#include <math.h>],
783 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
784 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
785 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
786 AC_TRY_COMPILE([#include <math.h>],
787 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
788 AC_TRY_COMPILE([#include <math.h>],
789 [isunordered(0.0,0.0);],, [ac_c99_math=no])
790 AC_MSG_RESULT($ac_c99_math)
792 # Check for the existence in <stdio.h> of vscanf, et. al.
794 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
795 AC_TRY_COMPILE([#include <stdio.h>],
796 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
797 AC_TRY_COMPILE([#include <stdio.h>
799 void foo(char* fmt, ...)
800 {va_list args; va_start(args, fmt);
801 vfscanf(stderr, "%i", args);}],
802 [],, [ac_c99_stdio=no])
803 AC_TRY_COMPILE([#include <stdio.h>
805 void foo(char* fmt, ...)
806 {va_list args; va_start(args, fmt);
807 vscanf("%i", args);}],
808 [],, [ac_c99_stdio=no])
809 AC_TRY_COMPILE([#include <stdio.h>
811 void foo(char* fmt, ...)
812 {va_list args; va_start(args, fmt);
813 vsnprintf(fmt, 0, "%i", args);}],
814 [],, [ac_c99_stdio=no])
815 AC_TRY_COMPILE([#include <stdio.h>
817 void foo(char* fmt, ...)
818 {va_list args; va_start(args, fmt);
819 vsscanf(fmt, "%i", args);}],
820 [],, [ac_c99_stdio=no])
821 AC_MSG_RESULT($ac_c99_stdio)
823 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
825 AC_MSG_CHECKING([for lldiv_t declaration])
826 AC_CACHE_VAL(ac_c99_lldiv_t, [
827 AC_TRY_COMPILE([#include <stdlib.h>],
829 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
831 AC_MSG_RESULT($ac_c99_lldiv_t)
833 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
834 AC_TRY_COMPILE([#include <stdlib.h>],
835 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
836 AC_TRY_COMPILE([#include <stdlib.h>],
837 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
838 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
839 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
840 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
841 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
842 if test x"$ac_c99_lldiv_t" = x"no"; then
845 AC_MSG_RESULT($ac_c99_stdlib)
847 # Check for the existence of <wchar.h> functions used if C99 is enabled.
848 # XXX the wchar.h checks should be rolled into the general C99 bits.
850 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
851 AC_TRY_COMPILE([#include <wchar.h>],
852 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
853 AC_TRY_COMPILE([#include <wchar.h>],
854 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
855 AC_TRY_COMPILE([#include <wchar.h>],
856 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
857 AC_MSG_RESULT($ac_c99_wchar)
859 AC_MSG_CHECKING([for enabled ISO C99 support])
860 if test x"$ac_c99_math" = x"no" ||
861 test x"$ac_c99_stdio" = x"no" ||
862 test x"$ac_c99_stdlib" = x"no" ||
863 test x"$ac_c99_wchar" = x"no"; then
866 AC_MSG_RESULT($enable_c99)
868 # Option parsed, now set things appropriately
869 if test x"$enable_c99" = x"yes"; then
870 AC_DEFINE(_GLIBCXX_USE_C99)
878 dnl Check for what type of C headers to use.
880 dnl --enable-cheaders= [does stuff].
881 dnl --disable-cheaders [does not do anything, really].
882 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
883 dnl Where DEFAULT is either `c' or `c_std'.
885 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
886 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
887 [construct "C" headers for g++], [permit c|c_std])
888 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
890 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
892 AC_SUBST(C_INCLUDE_DIR)
893 AM_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
894 AM_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
895 AM_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
900 dnl Check for which locale library to use. The choice is mapped to
901 dnl a subdirectory of config/locale.
903 dnl Default is generic.
905 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
906 AC_MSG_CHECKING([for C locale to use])
907 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
908 [use MODEL for target locale package],
909 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
911 # If they didn't use this option switch, or if they specified --enable
912 # with no specific model, we'll have to look for one. If they
913 # specified --disable (???), do likewise.
914 if test $enable_clocale = no || test $enable_clocale = yes; then
918 # Either a known package, or "auto"
919 enable_clocale_flag=$enable_clocale
921 # Probe for locale support if no specific model is specified.
922 # Default to "generic".
923 if test $enable_clocale_flag = auto; then
924 case x${target_os} in
926 AC_EGREP_CPP([_GLIBCXX_ok], [
927 #include <features.h>
928 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
931 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
933 # Test for bugs early in glibc-2.2.x series
934 if test x$enable_clocale_flag = xgnu; then
936 #define _GNU_SOURCE 1
939 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
940 extern __typeof(newlocale) __newlocale;
941 extern __typeof(duplocale) __duplocale;
942 extern __typeof(strcoll_l) __strcoll_l;
946 const char __one[] = "Äuglein Augmen";
947 const char __two[] = "Äuglein";
952 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
953 loc_dup = __duplocale(loc);
954 i = __strcoll_l(__one, __two, loc);
955 j = __strcoll_l(__one, __two, loc_dup);
959 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
960 [enable_clocale_flag=generic])
963 # ... at some point put __strxfrm_l tests in as well.
966 enable_clocale_flag=generic
971 # Deal with gettext issues. Default to not using it (=no) until we detect
972 # support for it later. Let the user turn it off via --e/d, but let that
973 # default to on for easier handling.
976 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
980 # Set configure bits for specified locale package
981 case ${enable_clocale_flag} in
983 AC_MSG_RESULT(generic)
985 CLOCALE_H=config/locale/generic/c_locale.h
986 CLOCALE_CC=config/locale/generic/c_locale.cc
987 CCODECVT_H=config/locale/generic/codecvt_specializations.h
988 CCODECVT_CC=config/locale/generic/codecvt_members.cc
989 CCOLLATE_CC=config/locale/generic/collate_members.cc
990 CCTYPE_CC=config/locale/generic/ctype_members.cc
991 CMESSAGES_H=config/locale/generic/messages_members.h
992 CMESSAGES_CC=config/locale/generic/messages_members.cc
993 CMONEY_CC=config/locale/generic/monetary_members.cc
994 CNUMERIC_CC=config/locale/generic/numeric_members.cc
995 CTIME_H=config/locale/generic/time_members.h
996 CTIME_CC=config/locale/generic/time_members.cc
997 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1002 # Declare intention to use gettext, and add support for specific
1004 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1007 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1008 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1009 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1012 # Export the build objects.
1013 for ling in $ALL_LINGUAS; do \
1014 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1015 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1017 AC_SUBST(glibcxx_MOFILES)
1018 AC_SUBST(glibcxx_POFILES)
1020 CLOCALE_H=config/locale/gnu/c_locale.h
1021 CLOCALE_CC=config/locale/gnu/c_locale.cc
1022 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1023 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1024 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1025 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1026 CMESSAGES_H=config/locale/gnu/messages_members.h
1027 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1028 CMONEY_CC=config/locale/gnu/monetary_members.cc
1029 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1030 CTIME_H=config/locale/gnu/time_members.h
1031 CTIME_CC=config/locale/gnu/time_members.cc
1032 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1035 AC_MSG_RESULT(IEEE 1003.1)
1037 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1038 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1039 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1040 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1041 CCOLLATE_CC=config/locale/generic/collate_members.cc
1042 CCTYPE_CC=config/locale/generic/ctype_members.cc
1043 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1044 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1045 CMONEY_CC=config/locale/generic/monetary_members.cc
1046 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1047 CTIME_H=config/locale/generic/time_members.h
1048 CTIME_CC=config/locale/generic/time_members.cc
1049 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1053 # This is where the testsuite looks for locale catalogs, using the
1054 # -DLOCALEDIR define during testsuite compilation.
1055 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1056 AC_SUBST(glibcxx_localedir)
1058 # A standalone libintl (e.g., GNU libintl) may be in use.
1059 if test $USE_NLS = yes; then
1060 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1061 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1063 if test $USE_NLS = yes; then
1064 AC_DEFINE(_GLIBCXX_USE_NLS)
1069 AC_SUBST(CCODECVT_H)
1070 AC_SUBST(CMESSAGES_H)
1071 AC_SUBST(CCODECVT_CC)
1072 AC_SUBST(CCOLLATE_CC)
1074 AC_SUBST(CMESSAGES_CC)
1076 AC_SUBST(CNUMERIC_CC)
1079 AC_SUBST(CLOCALE_CC)
1080 AC_SUBST(CLOCALE_INTERNAL_H)
1085 dnl Check for whether the Boost-derived checks should be turned on.
1087 dnl --enable-concept-checks turns them on.
1088 dnl --disable-concept-checks leaves them off.
1089 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1090 dnl Where DEFAULT is either `yes' or `no'.
1092 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1093 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1094 if test $enable_concept_checks = yes; then
1095 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1101 dnl Check for which I/O library to use: stdio, or something specific.
1103 dnl Default is stdio.
1105 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1106 AC_MSG_CHECKING([for underlying I/O to use])
1107 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1108 [use target-specific I/O package], [permit stdio])
1110 # Now that libio has been removed, you can have any color you want as long
1111 # as it's black. This is one big no-op until other packages are added, but
1112 # showing the framework never hurts.
1113 case ${enable_cstdio} in
1115 CSTDIO_H=config/io/c_io_stdio.h
1116 BASIC_FILE_H=config/io/basic_file_stdio.h
1117 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1118 AC_MSG_RESULT(stdio)
1122 dnl Set directory for fpos.h
1123 FPOS_H=$fpos_include_dir
1127 AC_SUBST(BASIC_FILE_H)
1128 AC_SUBST(BASIC_FILE_CC)
1133 dnl Check for "unusual" flags to pass to the compiler while building.
1135 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1136 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1137 dnl --disable-cxx-flags passes nothing.
1138 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1139 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1140 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1141 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1142 dnl If "default flags" is an empty string, the effect is the same
1143 dnl as --disable or --enable=no.
1145 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1146 AC_MSG_CHECKING([for extra compiler flags for building])
1147 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1148 [pass compiler FLAGS when building library],
1149 [case "x$enable_cxx_flags" in
1150 xno | x) enable_cxx_flags= ;;
1152 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1155 # Run through flags (either default or command-line) and set anything
1156 # extra (e.g., #defines) that must accompany particular g++ options.
1157 if test -n "$enable_cxx_flags"; then
1158 for f in $enable_cxx_flags; do
1162 *) # and we're trying to pass /what/ exactly?
1163 AC_MSG_ERROR([compiler flags start with a -]) ;;
1168 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1169 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1170 AC_SUBST(EXTRA_CXX_FLAGS)
1175 dnl Check for wide character support. Has the same effect as the option
1176 dnl in gcc's configure, but in a form that autoconf can mess with.
1178 dnl --enable-c-mbchar requests all the wchar_t stuff.
1179 dnl --disable-c-mbchar doesn't.
1180 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1181 dnl Where DEFAULT is either `yes' or `no'.
1183 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1184 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1185 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1190 dnl Check to see if debugging libraries are to be built.
1192 dnl --enable-libstdcxx-debug
1193 dnl builds a separate set of debugging libraries in addition to the
1194 dnl normal (shared, static) libstdc++ binaries.
1196 dnl --disable-libstdcxx-debug
1197 dnl builds only one (non-debug) version of libstdc++.
1199 dnl --enable-libstdcxx-debug-flags=FLAGS
1200 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1202 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1203 dnl Where DEFAULT is either `yes' or `no'.
1205 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1206 AC_MSG_CHECKING([for additional debug build])
1207 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1208 AC_MSG_RESULT($enable_libstdcxx_debug)
1209 AM_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1214 dnl Check for explicit debug flags.
1216 dnl --enable-libstdcxx-debug-flags='-O1'
1217 dnl is a general method for passing flags to be used when
1218 dnl building debug libraries with --enable-debug.
1220 dnl --disable-libstdcxx-debug-flags does nothing.
1221 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1222 dnl If "default flags" is an empty string, the effect is the same
1223 dnl as --disable or --enable=no.
1225 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1226 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1227 [pass compiler FLAGS when building debug library],
1228 [case "x$enable_libstdcxx_debug_flags" in
1229 xno | x) enable_libstdcxx_debug_flags= ;;
1231 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1234 # Option parsed, now set things appropriately
1235 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1236 AC_SUBST(DEBUG_FLAGS)
1238 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1243 dnl Check for libunwind exception handling support. If enabled, then
1244 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1245 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1246 dnl libunwind instead of libgcc, and that libstdc++ has a dependency
1247 dnl on libunwind as well as libgcc.
1249 dnl --enable-libunwind-exceptions forces the use of libunwind.
1250 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1255 AC_DEFUN(GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS, [
1256 AC_MSG_CHECKING([for use of libunwind])
1257 GLIBCXX_ENABLE(libunwind-exceptions,no,,
1258 [force use of libunwind for exceptions])
1259 AC_MSG_RESULT($use_libunwind_exceptions)
1260 if test $enable_libunwind_exceptions = yes; then
1261 LIBUNWIND_FLAG="-lunwind"
1265 AC_SUBST(LIBUNWIND_FLAG)
1270 dnl Check for template specializations for the 'long long' type extension.
1271 dnl The result determines only whether 'long long' I/O is enabled; things
1272 dnl like numeric_limits<> specializations are always available.
1274 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1275 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1276 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1277 dnl Where DEFAULT is either `yes' or `no'.
1278 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1280 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1281 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1286 AC_MSG_CHECKING([for enabled long long I/O support])
1287 # iostreams require strtoll, strtoull to compile
1288 AC_TRY_COMPILE([#include <stdlib.h>],
1289 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1290 AC_TRY_COMPILE([#include <stdlib.h>],
1291 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1293 # Option parsed, now set things appropriately
1294 if test $enable_long_long = yes; then
1295 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1297 AC_MSG_RESULT($enable_long_long)
1304 dnl Check to see if building and using a C++ precompiled header can be done.
1306 dnl --enable-libstdcxx-pch=yes
1307 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1308 dnl may work, after some light-hearted attempts to puzzle out compiler
1309 dnl support, flip bits on in include/Makefile.am
1311 dnl --disable-libstdcxx-pch
1312 dnl turns off attempts to use or build stdc++.h.gch.
1315 dnl glibcxx_PCHFLAGS
1317 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1318 AC_MSG_CHECKING([for enabled PCH])
1319 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1320 AC_MSG_RESULT([$enable_libstdcxx_pch])
1322 if test $enable_libstdcxx_pch = yes; then
1323 AC_CACHE_CHECK([for compiler with PCH support],
1324 [glibcxx_cv_prog_CXX_pch],
1325 [ac_save_CXXFLAGS="$CXXFLAGS"
1326 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1329 echo '#include <math.h>' > conftest.h
1330 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1331 -o conftest.h.gch 1>&5 2>&1 &&
1332 echo '#error "pch failed"' > conftest.h &&
1333 echo '#include "conftest.h"' > conftest.cc &&
1334 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1336 glibcxx_cv_prog_CXX_pch=yes
1338 glibcxx_cv_prog_CXX_pch=no
1341 CXXFLAGS=$ac_save_CXXFLAGS
1344 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1347 AM_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1348 if test $enable_libstdcxx_pch = yes; then
1349 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1353 AC_SUBST(glibcxx_PCHFLAGS)
1358 dnl Check for exception handling support. If an explicit enable/disable
1359 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1360 dnl target may or may not support call frame exceptions.
1362 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1363 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1364 dnl Neither one forces an attempt at detection.
1367 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1369 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1370 AC_MSG_CHECKING([for exception model to use])
1373 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1374 [force use of builtin_setjmp for exceptions],
1375 [permit yes|no|auto])
1377 if test $enable_sjlj_exceptions = auto; then
1378 # Botheration. Now we've got to detect the exception model. Link tests
1379 # against libgcc.a are problematic since we've not been given proper -L
1380 # bits for single-tree newlib and libgloss.
1382 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1383 cat > conftest.$ac_ext << EOF
1384 [#]line __oline__ "configure"
1393 old_CXXFLAGS="$CXXFLAGS"
1395 if AC_TRY_EVAL(ac_compile); then
1396 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1397 enable_sjlj_exceptions=yes
1398 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1399 enable_sjlj_exceptions=no
1402 CXXFLAGS="$old_CXXFLAGS"
1406 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1407 # to two different models.
1408 case $enable_sjlj_exceptions in
1410 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1411 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1412 ac_exception_model_name=sjlj
1415 ac_exception_model_name="call frame"
1418 AC_MSG_ERROR([unable to detect exception model])
1422 AC_MSG_RESULT($ac_exception_model_name)
1427 dnl Add version tags to symbols in shared library (or not), additionally
1428 dnl marking other symbols as private/local (or not).
1430 dnl --enable-symvers=style adds a version script to the linker call when
1431 dnl creating the shared library. The choice of version script is
1432 dnl controlled by 'style'.
1433 dnl --disable-symvers does not.
1434 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1435 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1436 dnl choose a default style based on linker characteristics. Passing
1437 dnl 'no' disables versioning.
1439 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1441 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1442 [enables symbol versioning of the shared library],
1443 [permit yes|no|gnu])
1445 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1446 # don't know enough about $LD to do tricks...
1447 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1448 # FIXME The following test is too strict, in theory.
1449 if test $enable_shared = no ||
1451 test x$glibcxx_gnu_ld_version = x; then
1455 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1456 if test $enable_symvers != no; then
1457 AC_MSG_CHECKING([for shared libgcc])
1458 ac_save_CFLAGS="$CFLAGS"
1460 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1461 CFLAGS="$ac_save_CFLAGS"
1462 AC_MSG_RESULT($glibcxx_shared_libgcc)
1465 # For GNU ld, we need at least this version. The format is described in
1466 # GLIBCXX_CHECK_LINKER_FEATURES above.
1467 glibcxx_min_gnu_ld_version=21400
1468 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1470 # Check to see if unspecified "yes" value can win, given results above.
1471 # Change "yes" into either "no" or a style name.
1472 if test $enable_symvers = yes; then
1473 if test $with_gnu_ld = yes &&
1474 test $glibcxx_shared_libgcc = yes;
1476 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1479 # The right tools, the right setup, but too old. Fallbacks?
1480 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1481 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1482 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1483 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1484 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1485 # Globbing fix is present, proper block support is not.
1486 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1487 dnl enable_symvers=???
1488 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1492 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1498 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1499 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1500 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1501 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1506 # Everything parsed; figure out what file to use.
1507 case $enable_symvers in
1509 SYMVER_MAP=config/linker-map.dummy
1512 SYMVER_MAP=config/linker-map.gnu
1513 AC_DEFINE(_GLIBCXX_SYMVER)
1517 AC_SUBST(SYMVER_MAP)
1518 AC_SUBST(port_specific_symbol_files)
1519 AM_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1520 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1525 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1526 dnl We must stage the required headers so that they will be installed
1527 dnl with the library (unlike libgcc, the STL implementation is provided
1528 dnl solely within headers). Since we must not inject random user-space
1529 dnl macro names into user-provided C++ code, we first stage into <file>-in
1530 dnl and process to <file> with an output command. The reason for a two-
1531 dnl stage process here is to correctly handle $srcdir!=$objdir without
1532 dnl having to write complex code (the sed commands to clean the macro
1533 dnl namespace are complex and fragile enough as it is). We must also
1534 dnl add a relative path so that -I- is supported properly.
1537 dnl glibcxx_thread_h
1540 dnl HAVE_GTHR_DEFAULT
1541 dnl _GLIBCXX_SUPPORTS_WEAK
1543 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1544 AC_MSG_CHECKING([for thread model used by GCC])
1545 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1546 AC_MSG_RESULT([$target_thread_file])
1548 if test $target_thread_file != single; then
1549 AC_DEFINE(HAVE_GTHR_DEFAULT)
1550 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1553 glibcxx_thread_h=gthr-$target_thread_file.h
1554 AC_SUBST(glibcxx_thread_h)
1558 # Check whether LC_MESSAGES is available in <locale.h>.
1559 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1561 # This file file be copied and used freely without restrictions. It can
1562 # be used in projects which are not available under the GNU Public License
1563 # but which still want to provide support for the GNU gettext functionality.
1564 # Please note that the actual code is *not* freely available.
1567 AC_DEFUN(AC_LC_MESSAGES, [
1568 AC_CHECK_HEADER(locale.h, [
1569 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1570 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1571 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1572 if test $ac_cv_val_LC_MESSAGES = yes; then
1573 AC_DEFINE(HAVE_LC_MESSAGES)
1579 sinclude([../libtool.m4])
1580 dnl The lines below arrange for aclocal not to bring an installed
1581 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1582 dnl add a definition of LIBTOOL to Makefile.in.
1583 ifelse(,,,[AC_SUBST(LIBTOOL)
1584 AC_DEFUN([AM_PROG_LIBTOOL])
1585 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1586 AC_DEFUN([AC_PROG_LD])
1589 dnl vim:et:ts=2:sw=2