3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN(GLIBCXX_CONDITIONAL, [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN(GLIBCXX_EVALUATE_CONDITIONALS, [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN(GLIBCXX_CHECK_HOST, [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE(CPU config directory is $cpu_include_dir)
27 AC_MSG_NOTICE(OS config directory is $os_include_dir)
32 dnl Initialize basic configure bits.
37 AC_DEFUN(GLIBCXX_TOPREL_CONFIGURE, [
38 # Sets up multi_basedir, which is srcdir/.. plus the usual
39 # "multi_source_toprel_bottom_adjust" lunacy as needed.
40 AM_ENABLE_MULTILIB(, ..)
42 # The generated code is exactly the same, except that automake's looks in
43 # ".. $srcdir/.." and autoconf's looks in multi_basedir. Apparently other
44 # things are triggered on the presence of the two ...AUX_DIR[S], but I don't
45 # know what they are or what the other differences might be (and they keep
48 # Looking in multi_basedir seems smarter, so actually execute that branch.
50 # this is for automake
53 # this is for autoconf
54 AC_CONFIG_AUX_DIRS(${multi_basedir})
63 dnl Initialize the rest of the library configury. At this point we have
64 dnl variables like $host.
67 dnl gcc_version (x.y.z format)
70 dnl glibcxx_builddir (absolute path)
71 dnl glibcxx_srcdir (absolute path)
72 dnl toplevel_srcdir (absolute path)
75 dnl with_target_subdir
77 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
78 dnl - default settings for all AM_CONFITIONAL test variables
79 dnl - lots of tools, like CC and CXX
81 AC_DEFUN(GLIBCXX_CONFIGURE, [
82 # Keep these sync'd with the list in Makefile.am. The first provides an
83 # expandable list at autoconf time; the second provides an expandable list
84 # (i.e., shell variable) at configure time.
85 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
86 SUBDIRS='glibcxx_SUBDIRS'
88 # These need to be absolute paths, yet at the same time need to
89 # canonicalize only relative paths, because then amd will not unmount
90 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
91 glibcxx_builddir=`${PWDCMD-pwd}`
93 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
94 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
96 toplevel_srcdir=${glibcxx_srcdir}/..
97 AC_SUBST(glibcxx_builddir)
98 AC_SUBST(glibcxx_srcdir)
99 AC_SUBST(toplevel_srcdir)
101 # We use these options to decide which functions to include. They are
102 # set from the top level.
103 AC_ARG_WITH([target-subdir],
104 AC_HELP_STRING([--with-target-subdir=SUBDIR],
105 [configuring in a subdirectory]))
107 AC_ARG_WITH([cross-host],
108 AC_HELP_STRING([--with-cross-host=HOST],
109 [configuring with a cross compiler]))
111 AC_ARG_WITH([newlib],
112 AC_HELP_STRING([--with-newlib],
113 [assume newlib as a system C library]))
115 # We're almost certainly being configured before anything else which uses
116 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
117 # we not cache the value of CXX that we "discover" here, because it's set
118 # to something unique for us and libjava. Other target libraries need to
119 # find CXX for themselves. We yank the rug out from under the normal AC_*
120 # process by sneakily renaming the cache variable. This also lets us debug
121 # the value of "our" CXX in postmortems.
123 # We must also force CXX to /not/ be a precious variable, otherwise the
124 # wrong (non-multilib-adjusted) value will be used in multilibs. This
125 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
126 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
127 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
129 # -fno-builtin must be present here so that a non-conflicting form of
130 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
132 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
133 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
134 m4_define([_AC_ARG_VAR_PRECIOUS],[])
135 save_CXXFLAGS="$CXXFLAGS"
136 CXXFLAGS="$CXXFLAGS -fno-builtin"
139 CXXFLAGS="$save_CXXFLAGS"
140 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
144 # For directory versioning (e.g., headers) and other variables.
145 AC_MSG_CHECKING([for GCC version number])
146 gcc_version=`$CXX -dumpversion`
147 AC_MSG_RESULT($gcc_version)
149 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
150 # available). Uncomment the next line to force a particular method.
154 AC_CHECK_TOOL(AS, as)
155 AC_CHECK_TOOL(AR, ar)
156 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
160 # Set up safe default values for all subsequent AM_CONDITIONAL tests
161 # which are themselves conditionally expanded.
162 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
163 ## other macros from doing the same. This should be automated.) -pme
166 #enable_libstdcxx_debug=no
167 #enable_libstdcxx_pch=no
172 #enable_hosted_libstdcxx=yes
174 # Find platform-specific directories containing configuration info.
175 # Also possibly modify flags used elsewhere, as needed by the platform.
180 m4_include([linkage.m4])
181 m4_include([../config/no-executables.m4])
185 dnl Tests for newer compiler features, or features that are present in newer
186 dnl compiler versions but not older compiler versions still in use, should
190 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
191 dnl new inlining code or the new system_header pragma will die on -Werror.
192 dnl Leave it out by default and use maint-mode to use it.
193 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
194 dnl compiler supports it and the user has not requested debug mode.
196 AC_DEFUN(GLIBCXX_CHECK_COMPILER_FEATURES, [
197 # All these tests are for C++; save the language and the compiler flags.
198 # The CXXFLAGS thing is suspicious, but based on similar bits previously
199 # found in GLIBCXX_CONFIGURE.
202 ac_test_CXXFLAGS="${CXXFLAGS+set}"
203 ac_save_CXXFLAGS="$CXXFLAGS"
205 # Check for maintainer-mode bits.
206 if test x"$USE_MAINTAINER_MODE" = xno; then
212 # Check for -ffunction-sections -fdata-sections
213 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
214 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
215 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
216 if test "$ac_test_CXXFLAGS" = set; then
217 CXXFLAGS="$ac_save_CXXFLAGS"
219 # this is the suspicious part
222 if test x"$ac_fdsections" = x"yes"; then
223 SECTION_FLAGS='-ffunction-sections -fdata-sections'
225 AC_MSG_RESULT($ac_fdsections)
229 AC_SUBST(SECTION_FLAGS)
234 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
235 dnl the native linker is in use, all variables will be defined to something
236 dnl safe (like an empty string).
239 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
240 dnl OPT_LDFLAGS='-Wl,-O1' if possible
241 dnl LD (as a side effect of testing)
244 dnl glibcxx_gnu_ld_version (possibly)
246 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
247 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
249 AC_DEFUN(GLIBCXX_CHECK_LINKER_FEATURES, [
250 # If we're not using GNU ld, then there's no point in even trying these
251 # tests. Check for that first. We should have already tested for gld
252 # by now (in libtool), but require it now just to be safe...
253 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
254 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
255 AC_REQUIRE([AC_PROG_LD])
256 AC_REQUIRE([AC_PROG_AWK])
258 # The name set by libtool depends on the version of libtool. Shame on us
259 # for depending on an impl detail, but c'est la vie. Older versions used
260 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
261 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
262 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
263 # set (hence we're using an older libtool), then set it.
264 if test x${with_gnu_ld+set} != xset; then
265 if test x${ac_cv_prog_gnu_ld+set} != xset; then
266 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
269 with_gnu_ld=$ac_cv_prog_gnu_ld
273 # Start by getting the version number. I think the libtool test already
274 # does some of this, but throws away the result.
276 ldver=`$LD --version 2>/dev/null | head -1 | \
277 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
279 glibcxx_gnu_ld_version=`echo $ldver | \
280 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
283 if test "$with_gnu_ld" = "notbroken"; then
284 # GNU ld it is! Joy and bunny rabbits!
286 # All these tests are for C++; save the language and the compiler flags.
287 # Need to do this so that g++ won't try to link in libstdc++
288 ac_test_CFLAGS="${CFLAGS+set}"
289 ac_save_CFLAGS="$CFLAGS"
290 CFLAGS='-x c++ -Wl,--gc-sections'
292 # Check for -Wl,--gc-sections
293 # XXX This test is broken at the moment, as symbols required for linking
294 # are now in libsupc++ (not built yet). In addition, this test has
295 # cored on solaris in the past. In addition, --gc-sections doesn't
296 # really work at the moment (keeps on discarding used sections, first
297 # .eh_frame and now some of the glibc sections for iconv).
298 # Bzzzzt. Thanks for playing, maybe next time.
299 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
307 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
308 if test "$ac_test_CFLAGS" = set; then
309 CFLAGS="$ac_save_CFLAGS"
311 # this is the suspicious part
314 if test "$ac_sectionLDflags" = "yes"; then
315 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
317 AC_MSG_RESULT($ac_sectionLDflags)
320 # Set linker optimization flags.
321 if test x"$with_gnu_ld" = x"yes"; then
322 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
325 AC_SUBST(SECTION_LDFLAGS)
326 AC_SUBST(OPT_LDFLAGS)
331 dnl Check to see if this target can enable the wchar_t parts.
332 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
333 dnl must have been previously checked.) By default, wide characters are
337 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
338 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
340 AC_DEFUN(GLIBCXX_CHECK_WCHAR_T_SUPPORT, [
341 # Test wchar.h for mbstate_t, which is needed for char_traits and
342 # others even if wchar_t support is not on.
343 AC_MSG_CHECKING([for mbstate_t])
344 AC_TRY_COMPILE([#include <wchar.h>],
345 [mbstate_t teststate;],
346 have_mbstate_t=yes, have_mbstate_t=no)
347 AC_MSG_RESULT($have_mbstate_t)
348 if test x"$have_mbstate_t" = xyes; then
349 AC_DEFINE(HAVE_MBSTATE_T)
352 # Sanity check for existence of ISO C99 headers for extended encoding.
353 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
354 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
356 # Only continue checking if the ISO C99 headers exist and support is on.
357 if test x"$ac_has_wchar_h" = xyes &&
358 test x"$ac_has_wctype_h" = xyes &&
359 test x"$enable_c_mbchar" != xno; then
361 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
362 # numeric_limits can instantiate type_traits<wchar_t>
363 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
364 AC_TRY_COMPILE([#include <wchar.h>],
365 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
366 has_wchar_minmax=yes, has_wchar_minmax=no)
367 AC_MSG_RESULT($has_wchar_minmax)
369 # Test wchar.h for WEOF, which is what we use to determine whether
370 # to specialize for char_traits<wchar_t> or not.
371 AC_MSG_CHECKING([for WEOF])
374 #include <stddef.h>],
376 has_weof=yes, has_weof=no)
377 AC_MSG_RESULT($has_weof)
379 # Tests for wide character functions used in char_traits<wchar_t>.
381 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
384 # Checks for names injected into std:: by the c_std headers.
385 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
386 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
387 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
388 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
389 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
390 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
393 AC_MSG_CHECKING([for ISO C99 wchar_t support])
394 if test x"$has_weof" = xyes &&
395 test x"$has_wchar_minmax" = xyes &&
396 test x"$ac_wfuncs" = xyes;
398 ac_isoC99_wchar_t=yes
402 AC_MSG_RESULT($ac_isoC99_wchar_t)
404 # Use iconv for wchar_t to char conversions. As such, check for
405 # X/Open Portability Guide, version 2 features (XPG2).
406 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
407 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
409 # Check for existence of libiconv.a providing XPG2 wchar_t support.
410 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
412 LIBS="$LIBS $libiconv"
414 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
415 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
419 AC_MSG_CHECKING([for XPG2 wchar_t support])
420 if test x"$ac_has_iconv_h" = xyes &&
421 test x"$ac_has_langinfo_h" = xyes &&
422 test x"$ac_XPG2funcs" = xyes;
428 AC_MSG_RESULT($ac_XPG2_wchar_t)
430 # At the moment, only enable wchar_t specializations if all the
431 # above support is present.
432 if test x"$ac_isoC99_wchar_t" = xyes &&
433 test x"$ac_XPG2_wchar_t" = xyes;
435 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
439 AC_MSG_CHECKING([for enabled wchar_t specializations])
440 AC_MSG_RESULT($enable_wchar_t)
445 dnl Check for headers for, and arguments to, the setrlimit() function.
446 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
449 dnl _GLIBCXX_MEM_LIMITS if we can set artificial limits on memory
450 dnl various HAVE_MEMLIMIT_* for individual limit names
452 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT_ancilliary, [
455 #include <sys/time.h>
456 #include <sys/resource.h>
458 [ int f = RLIMIT_$1 ; ],
459 [glibcxx_mresult=1], [glibcxx_mresult=0])
460 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcxx_mresult,
461 [Only used in build directory testsuite_hooks.h.])
464 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT, [
465 setrlimit_have_headers=yes
466 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
468 [setrlimit_have_headers=no])
469 # If don't have the headers, then we can't run the tests now, and we
470 # won't be seeing any of these during testsuite compilation.
471 if test $setrlimit_have_headers = yes; then
472 # Can't do these in a loop, else the resulting syntax is wrong.
473 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
474 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
475 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
476 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
478 # Check for rlimit, setrlimit.
479 AC_CACHE_VAL(ac_setrlimit, [
482 #include <sys/time.h>
483 #include <sys/resource.h>
487 [ac_setrlimit=yes], [ac_setrlimit=no])
491 AC_MSG_CHECKING([for testsuite memory limit support])
492 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
494 AC_DEFINE(_GLIBCXX_MEM_LIMITS)
498 AC_MSG_RESULT($ac_mem_limits)
503 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
504 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
506 AC_DEFUN(GLIBCXX_CHECK_S_ISREG_OR_S_IFREG, [
507 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
509 [#include <sys/stat.h>],
512 S_ISREG(buffer.st_mode);],
513 [glibcxx_cv_S_ISREG=yes],
514 [glibcxx_cv_S_ISREG=no])
516 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
518 [#include <sys/stat.h>],
521 S_IFREG & buffer.st_mode;],
522 [glibcxx_cv_S_IFREG=yes],
523 [glibcxx_cv_S_IFREG=no])
525 if test $glibcxx_cv_S_ISREG = yes; then
526 AC_DEFINE(HAVE_S_ISREG)
527 elif test $glibcxx_cv_S_IFREG = yes; then
528 AC_DEFINE(HAVE_S_IFREG)
534 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
536 AC_DEFUN(GLIBCXX_CHECK_POLL, [
537 AC_CACHE_VAL(glibcxx_cv_POLL, [
540 [struct pollfd pfd[1];
541 pfd[0].events = POLLIN;
543 [glibcxx_cv_POLL=yes],
544 [glibcxx_cv_POLL=no])
546 if test $glibcxx_cv_POLL = yes; then
553 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
555 AC_DEFUN(GLIBCXX_CHECK_WRITEV, [
556 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
558 [#include <sys/uio.h>],
559 [struct iovec iov[2];
561 [glibcxx_cv_WRITEV=yes],
562 [glibcxx_cv_WRITEV=no])
564 if test $glibcxx_cv_WRITEV = yes; then
565 AC_DEFINE(HAVE_WRITEV)
571 dnl Does any necessary configuration of the testsuite directory. Generates
572 dnl the testsuite_hooks.h header.
574 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
577 dnl enable_abi_check / GLIBCXX_TEST_ABI
581 AC_DEFUN(GLIBCXX_CONFIGURE_TESTSUITE, [
582 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
583 # Do checks for memory limit functions.
584 GLIBCXX_CHECK_SETRLIMIT
586 # Look for setenv, so that extended locale tests can be performed.
587 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
590 # Export file names for ABI checking.
591 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
592 AC_SUBST(baseline_dir)
594 # Determine if checking the ABI is desirable.
595 if test $enable_symvers = no || test $is_hosted = no; then
600 enable_abi_check=no ;;
602 enable_abi_check=yes ;;
606 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
607 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
612 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
616 dnl TOPLEVEL_INCLUDES
618 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
619 # Used for every C++ compile we perform.
621 -I$glibcxx_builddir/include/$host_alias \
622 -I$glibcxx_builddir/include \
623 -I$glibcxx_srcdir/libsupc++"
625 # For Canadian crosses, pick this up too.
626 if test $CANADIAN = yes; then
627 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
630 # Stuff in the actual top level. Currently only used by libsupc++ to
631 # get unwind* headers from the gcc dir.
632 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
633 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
635 # Now, export this to all the little Makefiles....
636 AC_SUBST(GLIBCXX_INCLUDES)
637 AC_SUBST(TOPLEVEL_INCLUDES)
642 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
643 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
646 dnl OPTIMIZE_CXXFLAGS
649 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
650 # Optimization flags that are probably a good idea for thrill-seekers. Just
651 # uncomment the lines below and make, everything else is ready to go...
652 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
654 AC_SUBST(OPTIMIZE_CXXFLAGS)
656 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings'
662 dnl All installation directory information is determined here.
666 dnl glibcxx_prefixdir
667 dnl glibcxx_toolexecdir
668 dnl glibcxx_toolexeclibdir
670 dnl Assumes cross_compiling bits already done, and with_cross_host in
673 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
674 glibcxx_toolexecdir=no
675 glibcxx_toolexeclibdir=no
676 glibcxx_prefixdir=$prefix
678 AC_MSG_CHECKING([for gxx-include-dir])
679 AC_ARG_WITH([gxx-include-dir],
680 AC_HELP_STRING([--with-gxx-include-dir=DIR],
681 [installation directory for include files]),
683 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
684 no) gxx_include_dir=no ;;
685 *) gxx_include_dir=$withval ;;
687 [gxx_include_dir=no])
688 AC_MSG_RESULT($gxx_include_dir)
690 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
691 AC_ARG_ENABLE([version-specific-runtime-libs],
692 AC_HELP_STRING([--enable-version-specific-runtime-libs],
693 [Specify that runtime libraries should be installed in a compiler-specific directory]),
694 [case "$enableval" in
695 yes) version_specific_libs=yes ;;
696 no) version_specific_libs=no ;;
697 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
699 [version_specific_libs=no])
700 AC_MSG_RESULT($version_specific_libs)
702 # Default case for install directory for include files.
703 if test $version_specific_libs = no && test $gxx_include_dir = no; then
704 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
707 # Version-specific runtime libs processing.
708 if test $version_specific_libs = yes; then
709 # Need the gcc compiler version to know where to install libraries
710 # and header files if --enable-version-specific-runtime-libs option
712 if test x"$gxx_include_dir" = x"no"; then
713 gxx_include_dir='${libdir}/gcc-lib/${host_alias}/'$gcc_version/include/c++
715 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
716 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
719 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
720 # Install a library built with a cross compiler in tooldir, not libdir.
721 if test x"$glibcxx_toolexecdir" = x"no"; then
722 if test -n "$with_cross_host" &&
723 test x"$with_cross_host" != x"no"; then
724 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
725 glibcxx_toolexeclibdir='${toolexecdir}/lib'
727 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
728 glibcxx_toolexeclibdir='${libdir}'
730 multi_os_directory=`$CXX -print-multi-os-directory`
731 case $multi_os_directory in
732 .) ;; # Avoid trailing /.
733 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
737 AC_MSG_CHECKING([for install location])
738 AC_MSG_RESULT($gxx_include_dir)
740 AC_SUBST(glibcxx_prefixdir)
741 AC_SUBST(gxx_include_dir)
742 AC_SUBST(glibcxx_toolexecdir)
743 AC_SUBST(glibcxx_toolexeclibdir)
749 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
750 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
751 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
753 dnl See docs/html/17_intro/configury.html#enable for documentation.
755 m4_define([GLIBCXX_ENABLE],[dnl
756 m4_define([_g_switch],[--enable-$1])dnl
757 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
758 AC_ARG_ENABLE($1,_g_help,
763 m4_bpatsubst([$5],[permit ])) ;;
764 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
765 dnl Idea for future: generate a URL pointing to
766 dnl "onlinedocs/configopts.html#whatever"
773 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
777 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
778 m4_undefine([_g_switch])dnl
779 m4_undefine([_g_help])dnl
784 dnl Check for ISO/IEC 9899:1999 "C99" support.
786 dnl --enable-c99 defines _GLIBCXX_USE_C99
787 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
788 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
789 dnl Where DEFAULT is either `yes' or `no'.
790 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
792 AC_DEFUN(GLIBCXX_ENABLE_C99, [
793 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
798 # Check for the existence of <math.h> functions used if C99 is enabled.
800 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
801 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
802 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
803 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
804 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
805 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
806 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
807 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
808 AC_TRY_COMPILE([#include <math.h>],
809 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
810 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
811 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
812 AC_TRY_COMPILE([#include <math.h>],
813 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
814 AC_TRY_COMPILE([#include <math.h>],
815 [isunordered(0.0,0.0);],, [ac_c99_math=no])
816 AC_MSG_RESULT($ac_c99_math)
818 # Check for the existence in <stdio.h> of vscanf, et. al.
820 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
821 AC_TRY_COMPILE([#include <stdio.h>],
822 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
823 AC_TRY_COMPILE([#include <stdio.h>
825 void foo(char* fmt, ...)
826 {va_list args; va_start(args, fmt);
827 vfscanf(stderr, "%i", args);}],
828 [],, [ac_c99_stdio=no])
829 AC_TRY_COMPILE([#include <stdio.h>
831 void foo(char* fmt, ...)
832 {va_list args; va_start(args, fmt);
833 vscanf("%i", args);}],
834 [],, [ac_c99_stdio=no])
835 AC_TRY_COMPILE([#include <stdio.h>
837 void foo(char* fmt, ...)
838 {va_list args; va_start(args, fmt);
839 vsnprintf(fmt, 0, "%i", args);}],
840 [],, [ac_c99_stdio=no])
841 AC_TRY_COMPILE([#include <stdio.h>
843 void foo(char* fmt, ...)
844 {va_list args; va_start(args, fmt);
845 vsscanf(fmt, "%i", args);}],
846 [],, [ac_c99_stdio=no])
847 AC_MSG_RESULT($ac_c99_stdio)
849 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
851 AC_MSG_CHECKING([for lldiv_t declaration])
852 AC_CACHE_VAL(ac_c99_lldiv_t, [
853 AC_TRY_COMPILE([#include <stdlib.h>],
855 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
857 AC_MSG_RESULT($ac_c99_lldiv_t)
859 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
860 AC_TRY_COMPILE([#include <stdlib.h>],
861 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
862 AC_TRY_COMPILE([#include <stdlib.h>],
863 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
864 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
865 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
866 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
867 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
868 if test x"$ac_c99_lldiv_t" = x"no"; then
871 AC_MSG_RESULT($ac_c99_stdlib)
873 # Check for the existence of <wchar.h> functions used if C99 is enabled.
874 # XXX the wchar.h checks should be rolled into the general C99 bits.
876 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
877 AC_TRY_COMPILE([#include <wchar.h>],
878 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
879 AC_TRY_COMPILE([#include <wchar.h>],
880 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
881 AC_TRY_COMPILE([#include <wchar.h>],
882 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
883 AC_MSG_RESULT($ac_c99_wchar)
885 AC_MSG_CHECKING([for enabled ISO C99 support])
886 if test x"$ac_c99_math" = x"no" ||
887 test x"$ac_c99_stdio" = x"no" ||
888 test x"$ac_c99_stdlib" = x"no" ||
889 test x"$ac_c99_wchar" = x"no"; then
892 AC_MSG_RESULT($enable_c99)
894 # Option parsed, now set things appropriately
895 if test x"$enable_c99" = x"yes"; then
896 AC_DEFINE(_GLIBCXX_USE_C99)
904 dnl Check for what type of C headers to use.
906 dnl --enable-cheaders= [does stuff].
907 dnl --disable-cheaders [does not do anything, really].
908 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
909 dnl Where DEFAULT is either `c' or `c_std'.
911 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
912 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
913 [construct "C" headers for g++], [permit c|c_std])
914 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
916 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
918 AC_SUBST(C_INCLUDE_DIR)
919 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
920 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
921 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
926 dnl Check for which locale library to use. The choice is mapped to
927 dnl a subdirectory of config/locale.
929 dnl Default is generic.
931 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
932 AC_MSG_CHECKING([for C locale to use])
933 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
934 [use MODEL for target locale package],
935 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
937 # If they didn't use this option switch, or if they specified --enable
938 # with no specific model, we'll have to look for one. If they
939 # specified --disable (???), do likewise.
940 if test $enable_clocale = no || test $enable_clocale = yes; then
944 # Either a known package, or "auto"
945 enable_clocale_flag=$enable_clocale
947 # Probe for locale support if no specific model is specified.
948 # Default to "generic".
949 if test $enable_clocale_flag = auto; then
950 case x${target_os} in
952 AC_EGREP_CPP([_GLIBCXX_ok], [
953 #include <features.h>
954 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
957 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
959 # Test for bugs early in glibc-2.2.x series
960 if test x$enable_clocale_flag = xgnu; then
962 #define _GNU_SOURCE 1
965 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
966 extern __typeof(newlocale) __newlocale;
967 extern __typeof(duplocale) __duplocale;
968 extern __typeof(strcoll_l) __strcoll_l;
972 const char __one[] = "Äuglein Augmen";
973 const char __two[] = "Äuglein";
978 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
979 loc_dup = __duplocale(loc);
980 i = __strcoll_l(__one, __two, loc);
981 j = __strcoll_l(__one, __two, loc_dup);
985 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
986 [enable_clocale_flag=generic])
989 # ... at some point put __strxfrm_l tests in as well.
992 enable_clocale_flag=generic
997 # Deal with gettext issues. Default to not using it (=no) until we detect
998 # support for it later. Let the user turn it off via --e/d, but let that
999 # default to on for easier handling.
1002 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1006 # Set configure bits for specified locale package
1007 case ${enable_clocale_flag} in
1009 AC_MSG_RESULT(generic)
1011 CLOCALE_H=config/locale/generic/c_locale.h
1012 CLOCALE_CC=config/locale/generic/c_locale.cc
1013 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1014 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1015 CCOLLATE_CC=config/locale/generic/collate_members.cc
1016 CCTYPE_CC=config/locale/generic/ctype_members.cc
1017 CMESSAGES_H=config/locale/generic/messages_members.h
1018 CMESSAGES_CC=config/locale/generic/messages_members.cc
1019 CMONEY_CC=config/locale/generic/monetary_members.cc
1020 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1021 CTIME_H=config/locale/generic/time_members.h
1022 CTIME_CC=config/locale/generic/time_members.cc
1023 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1028 # Declare intention to use gettext, and add support for specific
1030 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1033 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1034 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1035 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1038 # Export the build objects.
1039 for ling in $ALL_LINGUAS; do \
1040 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1041 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1043 AC_SUBST(glibcxx_MOFILES)
1044 AC_SUBST(glibcxx_POFILES)
1046 CLOCALE_H=config/locale/gnu/c_locale.h
1047 CLOCALE_CC=config/locale/gnu/c_locale.cc
1048 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1049 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1050 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1051 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1052 CMESSAGES_H=config/locale/gnu/messages_members.h
1053 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1054 CMONEY_CC=config/locale/gnu/monetary_members.cc
1055 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1056 CTIME_H=config/locale/gnu/time_members.h
1057 CTIME_CC=config/locale/gnu/time_members.cc
1058 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1061 AC_MSG_RESULT(IEEE 1003.1)
1063 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1064 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1065 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1066 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1067 CCOLLATE_CC=config/locale/generic/collate_members.cc
1068 CCTYPE_CC=config/locale/generic/ctype_members.cc
1069 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1070 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1071 CMONEY_CC=config/locale/generic/monetary_members.cc
1072 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1073 CTIME_H=config/locale/generic/time_members.h
1074 CTIME_CC=config/locale/generic/time_members.cc
1075 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1079 # This is where the testsuite looks for locale catalogs, using the
1080 # -DLOCALEDIR define during testsuite compilation.
1081 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1082 AC_SUBST(glibcxx_localedir)
1084 # A standalone libintl (e.g., GNU libintl) may be in use.
1085 if test $USE_NLS = yes; then
1086 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1087 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1089 if test $USE_NLS = yes; then
1090 AC_DEFINE(_GLIBCXX_USE_NLS)
1095 AC_SUBST(CCODECVT_H)
1096 AC_SUBST(CMESSAGES_H)
1097 AC_SUBST(CCODECVT_CC)
1098 AC_SUBST(CCOLLATE_CC)
1100 AC_SUBST(CMESSAGES_CC)
1102 AC_SUBST(CNUMERIC_CC)
1105 AC_SUBST(CLOCALE_CC)
1106 AC_SUBST(CLOCALE_INTERNAL_H)
1111 dnl Check for whether the Boost-derived checks should be turned on.
1113 dnl --enable-concept-checks turns them on.
1114 dnl --disable-concept-checks leaves them off.
1115 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1116 dnl Where DEFAULT is either `yes' or `no'.
1118 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1119 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1120 if test $enable_concept_checks = yes; then
1121 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1127 dnl Check for which I/O library to use: stdio, or something specific.
1129 dnl Default is stdio.
1131 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1132 AC_MSG_CHECKING([for underlying I/O to use])
1133 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1134 [use target-specific I/O package], [permit stdio])
1136 # Now that libio has been removed, you can have any color you want as long
1137 # as it's black. This is one big no-op until other packages are added, but
1138 # showing the framework never hurts.
1139 case ${enable_cstdio} in
1141 CSTDIO_H=config/io/c_io_stdio.h
1142 BASIC_FILE_H=config/io/basic_file_stdio.h
1143 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1144 AC_MSG_RESULT(stdio)
1148 dnl Set directory for fpos.h
1149 FPOS_H=$fpos_include_dir
1153 AC_SUBST(BASIC_FILE_H)
1154 AC_SUBST(BASIC_FILE_CC)
1159 dnl Check for "unusual" flags to pass to the compiler while building.
1161 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1162 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1163 dnl --disable-cxx-flags passes nothing.
1164 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1165 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1166 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1167 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1168 dnl If "default flags" is an empty string, the effect is the same
1169 dnl as --disable or --enable=no.
1171 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1172 AC_MSG_CHECKING([for extra compiler flags for building])
1173 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1174 [pass compiler FLAGS when building library],
1175 [case "x$enable_cxx_flags" in
1176 xno | x) enable_cxx_flags= ;;
1178 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1181 # Run through flags (either default or command-line) and set anything
1182 # extra (e.g., #defines) that must accompany particular g++ options.
1183 if test -n "$enable_cxx_flags"; then
1184 for f in $enable_cxx_flags; do
1188 *) # and we're trying to pass /what/ exactly?
1189 AC_MSG_ERROR([compiler flags start with a -]) ;;
1194 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1195 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1196 AC_SUBST(EXTRA_CXX_FLAGS)
1201 dnl Check for wide character support. Has the same effect as the option
1202 dnl in gcc's configure, but in a form that autoconf can mess with.
1204 dnl --enable-c-mbchar requests all the wchar_t stuff.
1205 dnl --disable-c-mbchar doesn't.
1206 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1207 dnl Where DEFAULT is either `yes' or `no'.
1209 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1210 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1211 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1216 dnl Check to see if debugging libraries are to be built.
1218 dnl --enable-libstdcxx-debug
1219 dnl builds a separate set of debugging libraries in addition to the
1220 dnl normal (shared, static) libstdc++ binaries.
1222 dnl --disable-libstdcxx-debug
1223 dnl builds only one (non-debug) version of libstdc++.
1225 dnl --enable-libstdcxx-debug-flags=FLAGS
1226 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1228 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1229 dnl Where DEFAULT is either `yes' or `no'.
1231 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1232 AC_MSG_CHECKING([for additional debug build])
1233 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1234 AC_MSG_RESULT($enable_libstdcxx_debug)
1235 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1240 dnl Check for explicit debug flags.
1242 dnl --enable-libstdcxx-debug-flags='-O1'
1243 dnl is a general method for passing flags to be used when
1244 dnl building debug libraries with --enable-debug.
1246 dnl --disable-libstdcxx-debug-flags does nothing.
1247 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1248 dnl If "default flags" is an empty string, the effect is the same
1249 dnl as --disable or --enable=no.
1251 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1252 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1253 [pass compiler FLAGS when building debug library],
1254 [case "x$enable_libstdcxx_debug_flags" in
1255 xno | x) enable_libstdcxx_debug_flags= ;;
1257 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1260 # Option parsed, now set things appropriately
1261 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1262 AC_SUBST(DEBUG_FLAGS)
1264 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1269 dnl Check if the user only wants a freestanding library implementation.
1271 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1272 dnl installing only the headers required by [17.4.1.3] and the language
1273 dnl support library. More than that will be built (to keep the Makefiles
1274 dnl conveniently clean), but not installed.
1277 dnl is_hosted (yes/no)
1279 AC_DEFUN(GLIBCXX_ENABLE_HOSTED, [
1280 AC_ARG_ENABLE([hosted-libstdcxx],
1281 AC_HELP_STRING([--disable-hosted-libstdcxx],
1282 [only build freestanding C++ runtime support]),,
1283 [enable_hosted_libstdcxx=yes])
1284 if test "$enable_hosted_libstdcxx" = no; then
1285 AC_MSG_NOTICE([Only freestanding libraries will be built])
1288 enable_libstdcxx_pch=no
1292 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1297 dnl Check for libunwind exception handling support. If enabled, then
1298 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1299 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1300 dnl libunwind instead of libgcc, and that libstdc++ has a dependency
1301 dnl on libunwind as well as libgcc.
1303 dnl --enable-libunwind-exceptions forces the use of libunwind.
1304 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1309 AC_DEFUN(GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS, [
1310 AC_MSG_CHECKING([for use of libunwind])
1311 GLIBCXX_ENABLE(libunwind-exceptions,no,,
1312 [force use of libunwind for exceptions])
1313 AC_MSG_RESULT($use_libunwind_exceptions)
1314 if test $enable_libunwind_exceptions = yes; then
1315 LIBUNWIND_FLAG="-lunwind"
1319 AC_SUBST(LIBUNWIND_FLAG)
1324 dnl Check for template specializations for the 'long long' type extension.
1325 dnl The result determines only whether 'long long' I/O is enabled; things
1326 dnl like numeric_limits<> specializations are always available.
1328 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1329 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1330 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1331 dnl Where DEFAULT is either `yes' or `no'.
1332 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1334 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1335 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1340 AC_MSG_CHECKING([for enabled long long I/O support])
1341 # iostreams require strtoll, strtoull to compile
1342 AC_TRY_COMPILE([#include <stdlib.h>],
1343 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1344 AC_TRY_COMPILE([#include <stdlib.h>],
1345 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1347 # Option parsed, now set things appropriately
1348 if test $enable_long_long = yes; then
1349 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1351 AC_MSG_RESULT($enable_long_long)
1358 dnl Check to see if building and using a C++ precompiled header can be done.
1360 dnl --enable-libstdcxx-pch=yes
1361 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1362 dnl may work, after some light-hearted attempts to puzzle out compiler
1363 dnl support, flip bits on in include/Makefile.am
1365 dnl --disable-libstdcxx-pch
1366 dnl turns off attempts to use or build stdc++.h.gch.
1369 dnl glibcxx_PCHFLAGS
1371 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1372 AC_MSG_CHECKING([for enabled PCH])
1373 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1374 AC_MSG_RESULT([$enable_libstdcxx_pch])
1376 if test $enable_libstdcxx_pch = yes; then
1377 AC_CACHE_CHECK([for compiler with PCH support],
1378 [glibcxx_cv_prog_CXX_pch],
1379 [ac_save_CXXFLAGS="$CXXFLAGS"
1380 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1383 echo '#include <math.h>' > conftest.h
1384 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1385 -o conftest.h.gch 1>&5 2>&1 &&
1386 echo '#error "pch failed"' > conftest.h &&
1387 echo '#include "conftest.h"' > conftest.cc &&
1388 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1390 glibcxx_cv_prog_CXX_pch=yes
1392 glibcxx_cv_prog_CXX_pch=no
1395 CXXFLAGS=$ac_save_CXXFLAGS
1398 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1401 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1402 if test $enable_libstdcxx_pch = yes; then
1403 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1407 AC_SUBST(glibcxx_PCHFLAGS)
1412 dnl Check for exception handling support. If an explicit enable/disable
1413 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1414 dnl target may or may not support call frame exceptions.
1416 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1417 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1418 dnl Neither one forces an attempt at detection.
1421 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1423 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1424 AC_MSG_CHECKING([for exception model to use])
1427 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1428 [force use of builtin_setjmp for exceptions],
1429 [permit yes|no|auto])
1431 if test $enable_sjlj_exceptions = auto; then
1432 # Botheration. Now we've got to detect the exception model. Link tests
1433 # against libgcc.a are problematic since we've not been given proper -L
1434 # bits for single-tree newlib and libgloss.
1436 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1437 cat > conftest.$ac_ext << EOF
1438 [#]line __oline__ "configure"
1447 old_CXXFLAGS="$CXXFLAGS"
1449 if AC_TRY_EVAL(ac_compile); then
1450 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1451 enable_sjlj_exceptions=yes
1452 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1453 enable_sjlj_exceptions=no
1456 CXXFLAGS="$old_CXXFLAGS"
1460 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1461 # to two different models.
1462 case $enable_sjlj_exceptions in
1464 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1465 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1466 ac_exception_model_name=sjlj
1469 ac_exception_model_name="call frame"
1472 AC_MSG_ERROR([unable to detect exception model])
1476 AC_MSG_RESULT($ac_exception_model_name)
1481 dnl Add version tags to symbols in shared library (or not), additionally
1482 dnl marking other symbols as private/local (or not).
1484 dnl --enable-symvers=style adds a version script to the linker call when
1485 dnl creating the shared library. The choice of version script is
1486 dnl controlled by 'style'.
1487 dnl --disable-symvers does not.
1488 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1489 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1490 dnl choose a default style based on linker characteristics. Passing
1491 dnl 'no' disables versioning.
1493 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1495 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1496 [enables symbol versioning of the shared library],
1497 [permit yes|no|gnu])
1499 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1500 # don't know enough about $LD to do tricks...
1501 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1502 # FIXME The following test is too strict, in theory.
1503 if test $enable_shared = no ||
1505 test x$glibcxx_gnu_ld_version = x; then
1509 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1510 if test $enable_symvers != no; then
1511 AC_MSG_CHECKING([for shared libgcc])
1512 ac_save_CFLAGS="$CFLAGS"
1514 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1515 CFLAGS="$ac_save_CFLAGS"
1516 AC_MSG_RESULT($glibcxx_shared_libgcc)
1519 # For GNU ld, we need at least this version. The format is described in
1520 # GLIBCXX_CHECK_LINKER_FEATURES above.
1521 glibcxx_min_gnu_ld_version=21400
1522 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1524 # Check to see if unspecified "yes" value can win, given results above.
1525 # Change "yes" into either "no" or a style name.
1526 if test $enable_symvers = yes; then
1527 if test $with_gnu_ld = yes &&
1528 test $glibcxx_shared_libgcc = yes;
1530 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1533 # The right tools, the right setup, but too old. Fallbacks?
1534 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1535 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1536 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1537 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1538 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1539 # Globbing fix is present, proper block support is not.
1540 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1541 dnl enable_symvers=???
1542 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1546 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1552 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1553 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1554 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1555 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1560 # Everything parsed; figure out what file to use.
1561 case $enable_symvers in
1563 SYMVER_MAP=config/linker-map.dummy
1566 SYMVER_MAP=config/linker-map.gnu
1567 AC_DEFINE(_GLIBCXX_SYMVER)
1571 AC_SUBST(SYMVER_MAP)
1572 AC_SUBST(port_specific_symbol_files)
1573 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1574 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1579 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1580 dnl We must stage the required headers so that they will be installed
1581 dnl with the library (unlike libgcc, the STL implementation is provided
1582 dnl solely within headers). Since we must not inject random user-space
1583 dnl macro names into user-provided C++ code, we first stage into <file>-in
1584 dnl and process to <file> with an output command. The reason for a two-
1585 dnl stage process here is to correctly handle $srcdir!=$objdir without
1586 dnl having to write complex code (the sed commands to clean the macro
1587 dnl namespace are complex and fragile enough as it is). We must also
1588 dnl add a relative path so that -I- is supported properly.
1591 dnl glibcxx_thread_h
1594 dnl HAVE_GTHR_DEFAULT
1595 dnl _GLIBCXX_SUPPORTS_WEAK
1597 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1598 AC_MSG_CHECKING([for thread model used by GCC])
1599 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1600 AC_MSG_RESULT([$target_thread_file])
1602 if test $target_thread_file != single; then
1603 AC_DEFINE(HAVE_GTHR_DEFAULT)
1604 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1607 glibcxx_thread_h=gthr-$target_thread_file.h
1608 AC_SUBST(glibcxx_thread_h)
1612 # Check whether LC_MESSAGES is available in <locale.h>.
1613 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1615 # This file file be copied and used freely without restrictions. It can
1616 # be used in projects which are not available under the GNU Public License
1617 # but which still want to provide support for the GNU gettext functionality.
1618 # Please note that the actual code is *not* freely available.
1621 AC_DEFUN(AC_LC_MESSAGES, [
1622 AC_CHECK_HEADER(locale.h, [
1623 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1624 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1625 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1626 if test $ac_cv_val_LC_MESSAGES = yes; then
1627 AC_DEFINE(HAVE_LC_MESSAGES)
1633 sinclude([../libtool.m4])
1634 dnl The lines below arrange for aclocal not to bring an installed
1635 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1636 dnl add a definition of LIBTOOL to Makefile.in.
1637 ifelse(,,,[AC_SUBST(LIBTOOL)
1638 AC_DEFUN([AM_PROG_LIBTOOL])
1639 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1640 AC_DEFUN([AC_PROG_LD])
1643 dnl vim:et:ts=2:sw=2