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 # For some reason, gettext needs this.
152 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
153 # available). Uncomment the next line to force a particular method.
157 AC_CHECK_TOOL(AS, as)
158 AC_CHECK_TOOL(AR, ar)
159 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
163 # Set up safe default values for all subsequent AM_CONDITIONAL tests
164 # which are themselves conditionally expanded.
165 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
166 ## other macros from doing the same. This should be automated.) -pme
169 #enable_libstdcxx_debug=no
170 #enable_libstdcxx_pch=no
175 #enable_hosted_libstdcxx=yes
177 # Find platform-specific directories containing configuration info.
178 # Also possibly modify flags used elsewhere, as needed by the platform.
183 m4_include([linkage.m4])
187 dnl Tests for newer compiler features, or features that are present in newer
188 dnl compiler versions but not older compiler versions still in use, should
192 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
193 dnl new inlining code or the new system_header pragma will die on -Werror.
194 dnl Leave it out by default and use maint-mode to use it.
195 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
196 dnl compiler supports it and the user has not requested debug mode.
198 AC_DEFUN(GLIBCXX_CHECK_COMPILER_FEATURES, [
199 # All these tests are for C++; save the language and the compiler flags.
200 # The CXXFLAGS thing is suspicious, but based on similar bits previously
201 # found in GLIBCXX_CONFIGURE.
204 ac_test_CXXFLAGS="${CXXFLAGS+set}"
205 ac_save_CXXFLAGS="$CXXFLAGS"
207 # Check for maintainer-mode bits.
208 if test x"$USE_MAINTAINER_MODE" = xno; then
214 # Check for -ffunction-sections -fdata-sections
215 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
216 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
217 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
218 if test "$ac_test_CXXFLAGS" = set; then
219 CXXFLAGS="$ac_save_CXXFLAGS"
221 # this is the suspicious part
224 if test x"$ac_fdsections" = x"yes"; then
225 SECTION_FLAGS='-ffunction-sections -fdata-sections'
227 AC_MSG_RESULT($ac_fdsections)
231 AC_SUBST(SECTION_FLAGS)
236 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
237 dnl the native linker is in use, all variables will be defined to something
238 dnl safe (like an empty string).
241 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
242 dnl OPT_LDFLAGS='-Wl,-O1' if possible
243 dnl LD (as a side effect of testing)
246 dnl glibcxx_gnu_ld_version (possibly)
248 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
249 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
251 AC_DEFUN(GLIBCXX_CHECK_LINKER_FEATURES, [
252 # If we're not using GNU ld, then there's no point in even trying these
253 # tests. Check for that first. We should have already tested for gld
254 # by now (in libtool), but require it now just to be safe...
255 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
256 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
257 AC_REQUIRE([AC_PROG_LD])
258 AC_REQUIRE([AC_PROG_AWK])
260 # The name set by libtool depends on the version of libtool. Shame on us
261 # for depending on an impl detail, but c'est la vie. Older versions used
262 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
263 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
264 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
265 # set (hence we're using an older libtool), then set it.
266 if test x${with_gnu_ld+set} != xset; then
267 if test x${ac_cv_prog_gnu_ld+set} != xset; then
268 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
271 with_gnu_ld=$ac_cv_prog_gnu_ld
275 # Start by getting the version number. I think the libtool test already
276 # does some of this, but throws away the result.
278 ldver=`$LD --version 2>/dev/null | head -1 | \
279 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
281 glibcxx_gnu_ld_version=`echo $ldver | \
282 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
285 if test "$with_gnu_ld" = "notbroken"; then
286 # GNU ld it is! Joy and bunny rabbits!
288 # All these tests are for C++; save the language and the compiler flags.
289 # Need to do this so that g++ won't try to link in libstdc++
290 ac_test_CFLAGS="${CFLAGS+set}"
291 ac_save_CFLAGS="$CFLAGS"
292 CFLAGS='-x c++ -Wl,--gc-sections'
294 # Check for -Wl,--gc-sections
295 # XXX This test is broken at the moment, as symbols required for linking
296 # are now in libsupc++ (not built yet). In addition, this test has
297 # cored on solaris in the past. In addition, --gc-sections doesn't
298 # really work at the moment (keeps on discarding used sections, first
299 # .eh_frame and now some of the glibc sections for iconv).
300 # Bzzzzt. Thanks for playing, maybe next time.
301 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
309 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
310 if test "$ac_test_CFLAGS" = set; then
311 CFLAGS="$ac_save_CFLAGS"
313 # this is the suspicious part
316 if test "$ac_sectionLDflags" = "yes"; then
317 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
319 AC_MSG_RESULT($ac_sectionLDflags)
322 # Set linker optimization flags.
323 if test x"$with_gnu_ld" = x"yes"; then
324 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
327 AC_SUBST(SECTION_LDFLAGS)
328 AC_SUBST(OPT_LDFLAGS)
333 dnl Check to see if this target can enable the wchar_t parts.
334 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
335 dnl must have been previously checked.) By default, wide characters are
339 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
340 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
342 AC_DEFUN(GLIBCXX_CHECK_WCHAR_T_SUPPORT, [
343 # Test wchar.h for mbstate_t, which is needed for char_traits and
344 # others even if wchar_t support is not on.
345 AC_MSG_CHECKING([for mbstate_t])
346 AC_TRY_COMPILE([#include <wchar.h>],
347 [mbstate_t teststate;],
348 have_mbstate_t=yes, have_mbstate_t=no)
349 AC_MSG_RESULT($have_mbstate_t)
350 if test x"$have_mbstate_t" = xyes; then
351 AC_DEFINE(HAVE_MBSTATE_T)
354 # Sanity check for existence of ISO C99 headers for extended encoding.
355 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
356 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
358 # Only continue checking if the ISO C99 headers exist and support is on.
359 if test x"$ac_has_wchar_h" = xyes &&
360 test x"$ac_has_wctype_h" = xyes &&
361 test x"$enable_c_mbchar" != xno; then
363 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
364 # numeric_limits can instantiate type_traits<wchar_t>
365 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
366 AC_TRY_COMPILE([#include <wchar.h>],
367 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
368 has_wchar_minmax=yes, has_wchar_minmax=no)
369 AC_MSG_RESULT($has_wchar_minmax)
371 # Test wchar.h for WEOF, which is what we use to determine whether
372 # to specialize for char_traits<wchar_t> or not.
373 AC_MSG_CHECKING([for WEOF])
376 #include <stddef.h>],
378 has_weof=yes, has_weof=no)
379 AC_MSG_RESULT($has_weof)
381 # Tests for wide character functions used in char_traits<wchar_t>.
383 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
386 # Checks for names injected into std:: by the c_std headers.
387 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
388 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
389 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
390 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
391 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
392 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
395 AC_MSG_CHECKING([for ISO C99 wchar_t support])
396 if test x"$has_weof" = xyes &&
397 test x"$has_wchar_minmax" = xyes &&
398 test x"$ac_wfuncs" = xyes;
400 ac_isoC99_wchar_t=yes
404 AC_MSG_RESULT($ac_isoC99_wchar_t)
406 # Use iconv for wchar_t to char conversions. As such, check for
407 # X/Open Portability Guide, version 2 features (XPG2).
408 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
409 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
411 # Check for existence of libiconv.a providing XPG2 wchar_t support.
412 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
414 LIBS="$LIBS $libiconv"
416 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
417 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
421 AC_MSG_CHECKING([for XPG2 wchar_t support])
422 if test x"$ac_has_iconv_h" = xyes &&
423 test x"$ac_has_langinfo_h" = xyes &&
424 test x"$ac_XPG2funcs" = xyes;
430 AC_MSG_RESULT($ac_XPG2_wchar_t)
432 # At the moment, only enable wchar_t specializations if all the
433 # above support is present.
434 if test x"$ac_isoC99_wchar_t" = xyes &&
435 test x"$ac_XPG2_wchar_t" = xyes;
437 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
441 AC_MSG_CHECKING([for enabled wchar_t specializations])
442 AC_MSG_RESULT($enable_wchar_t)
447 dnl Check for headers for, and arguments to, the setrlimit() function.
448 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
451 dnl _GLIBCXX_MEM_LIMITS if we can set artificial limits on memory
452 dnl various HAVE_MEMLIMIT_* for individual limit names
454 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT_ancilliary, [
457 #include <sys/time.h>
458 #include <sys/resource.h>
460 [ int f = RLIMIT_$1 ; ],
461 [glibcxx_mresult=1], [glibcxx_mresult=0])
462 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcxx_mresult,
463 [Only used in build directory testsuite_hooks.h.])
466 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT, [
467 setrlimit_have_headers=yes
468 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
470 [setrlimit_have_headers=no])
471 # If don't have the headers, then we can't run the tests now, and we
472 # won't be seeing any of these during testsuite compilation.
473 if test $setrlimit_have_headers = yes; then
474 # Can't do these in a loop, else the resulting syntax is wrong.
475 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
476 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
477 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
478 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
480 # Check for rlimit, setrlimit.
481 AC_CACHE_VAL(ac_setrlimit, [
484 #include <sys/time.h>
485 #include <sys/resource.h>
489 [ac_setrlimit=yes], [ac_setrlimit=no])
493 AC_MSG_CHECKING([for testsuite memory limit support])
494 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
496 AC_DEFINE(_GLIBCXX_MEM_LIMITS)
500 AC_MSG_RESULT($ac_mem_limits)
505 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
506 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
508 AC_DEFUN(GLIBCXX_CHECK_S_ISREG_OR_S_IFREG, [
509 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
511 [#include <sys/stat.h>],
514 S_ISREG(buffer.st_mode);],
515 [glibcxx_cv_S_ISREG=yes],
516 [glibcxx_cv_S_ISREG=no])
518 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
520 [#include <sys/stat.h>],
523 S_IFREG & buffer.st_mode;],
524 [glibcxx_cv_S_IFREG=yes],
525 [glibcxx_cv_S_IFREG=no])
527 if test $glibcxx_cv_S_ISREG = yes; then
528 AC_DEFINE(HAVE_S_ISREG)
529 elif test $glibcxx_cv_S_IFREG = yes; then
530 AC_DEFINE(HAVE_S_IFREG)
536 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
538 AC_DEFUN(GLIBCXX_CHECK_POLL, [
539 AC_CACHE_VAL(glibcxx_cv_POLL, [
542 [struct pollfd pfd[1];
543 pfd[0].events = POLLIN;
545 [glibcxx_cv_POLL=yes],
546 [glibcxx_cv_POLL=no])
548 if test $glibcxx_cv_POLL = yes; then
555 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
557 AC_DEFUN(GLIBCXX_CHECK_WRITEV, [
558 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
560 [#include <sys/uio.h>],
561 [struct iovec iov[2];
563 [glibcxx_cv_WRITEV=yes],
564 [glibcxx_cv_WRITEV=no])
566 if test $glibcxx_cv_WRITEV = yes; then
567 AC_DEFINE(HAVE_WRITEV)
573 dnl Does any necessary configuration of the testsuite directory. Generates
574 dnl the testsuite_hooks.h header.
576 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
579 dnl enable_abi_check / GLIBCXX_TEST_ABI
583 AC_DEFUN(GLIBCXX_CONFIGURE_TESTSUITE, [
584 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
585 # Do checks for memory limit functions.
586 GLIBCXX_CHECK_SETRLIMIT
588 # Look for setenv, so that extended locale tests can be performed.
589 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
592 # Export file names for ABI checking.
593 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
594 AC_SUBST(baseline_dir)
596 # Determine if checking the ABI is desirable.
597 if test $enable_symvers = no || test $is_hosted = no; then
602 enable_abi_check=no ;;
604 enable_abi_check=yes ;;
608 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
609 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
614 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
618 dnl TOPLEVEL_INCLUDES
620 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
621 # Used for every C++ compile we perform.
623 -I$glibcxx_builddir/include/$host_alias \
624 -I$glibcxx_builddir/include \
625 -I$glibcxx_srcdir/libsupc++"
627 # For Canadian crosses, pick this up too.
628 if test $CANADIAN = yes; then
629 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES '-I${includedir}'"
632 # Stuff in the actual top level. Currently only used by libsupc++ to
633 # get unwind* headers from the gcc dir.
634 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
635 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
637 # Now, export this to all the little Makefiles....
638 AC_SUBST(GLIBCXX_INCLUDES)
639 AC_SUBST(TOPLEVEL_INCLUDES)
644 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
645 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
648 dnl OPTIMIZE_CXXFLAGS
651 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
652 # Optimization flags that are probably a good idea for thrill-seekers. Just
653 # uncomment the lines below and make, everything else is ready to go...
654 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
656 AC_SUBST(OPTIMIZE_CXXFLAGS)
658 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings'
664 dnl All installation directory information is determined here.
668 dnl glibcxx_prefixdir
669 dnl glibcxx_toolexecdir
670 dnl glibcxx_toolexeclibdir
672 dnl Assumes cross_compiling bits already done, and with_cross_host in
675 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
676 glibcxx_toolexecdir=no
677 glibcxx_toolexeclibdir=no
678 glibcxx_prefixdir=$prefix
680 AC_MSG_CHECKING([for gxx-include-dir])
681 AC_ARG_WITH([gxx-include-dir],
682 AC_HELP_STRING([--with-gxx-include-dir=DIR],
683 [installation directory for include files]),
685 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
686 no) gxx_include_dir=no ;;
687 *) gxx_include_dir=$withval ;;
689 [gxx_include_dir=no])
690 AC_MSG_RESULT($gxx_include_dir)
692 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
693 AC_ARG_ENABLE([version-specific-runtime-libs],
694 AC_HELP_STRING([--enable-version-specific-runtime-libs],
695 [Specify that runtime libraries should be installed in a compiler-specific directory]),
696 [case "$enableval" in
697 yes) version_specific_libs=yes ;;
698 no) version_specific_libs=no ;;
699 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
701 [version_specific_libs=no])
702 AC_MSG_RESULT($version_specific_libs)
704 # Default case for install directory for include files.
705 if test $version_specific_libs = no && test $gxx_include_dir = no; then
706 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
709 # Version-specific runtime libs processing.
710 if test $version_specific_libs = yes; then
711 # Need the gcc compiler version to know where to install libraries
712 # and header files if --enable-version-specific-runtime-libs option
714 if test x"$gxx_include_dir" = x"no"; then
715 gxx_include_dir='${libdir}/gcc-lib/${host_alias}/'$gcc_version/include/c++
717 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
718 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
721 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
722 # Install a library built with a cross compiler in tooldir, not libdir.
723 if test x"$glibcxx_toolexecdir" = x"no"; then
724 if test -n "$with_cross_host" &&
725 test x"$with_cross_host" != x"no"; then
726 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
727 glibcxx_toolexeclibdir='${toolexecdir}/lib'
729 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
730 glibcxx_toolexeclibdir='${libdir}'
732 multi_os_directory=`$CXX -print-multi-os-directory`
733 case $multi_os_directory in
734 .) ;; # Avoid trailing /.
735 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
739 AC_MSG_CHECKING([for install location])
740 AC_MSG_RESULT($gxx_include_dir)
742 AC_SUBST(glibcxx_prefixdir)
743 AC_SUBST(gxx_include_dir)
744 AC_SUBST(glibcxx_toolexecdir)
745 AC_SUBST(glibcxx_toolexeclibdir)
751 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
752 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
753 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
755 dnl See docs/html/17_intro/configury.html#enable for documentation.
757 m4_define([GLIBCXX_ENABLE],[dnl
758 m4_define([_g_switch],[--enable-$1])dnl
759 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
760 AC_ARG_ENABLE($1,_g_help,
765 m4_bpatsubst([$5],[permit ])) ;;
766 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
767 dnl Idea for future: generate a URL pointing to
768 dnl "onlinedocs/configopts.html#whatever"
775 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
779 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
780 m4_undefine([_g_switch])dnl
781 m4_undefine([_g_help])dnl
786 dnl Check for ISO/IEC 9899:1999 "C99" support.
788 dnl --enable-c99 defines _GLIBCXX_USE_C99
789 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
790 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
791 dnl Where DEFAULT is either `yes' or `no'.
792 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
794 AC_DEFUN(GLIBCXX_ENABLE_C99, [
795 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
800 # Check for the existence of <math.h> functions used if C99 is enabled.
802 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
803 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
804 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
805 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
806 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
807 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
808 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
809 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
810 AC_TRY_COMPILE([#include <math.h>],
811 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
812 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
813 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
814 AC_TRY_COMPILE([#include <math.h>],
815 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
816 AC_TRY_COMPILE([#include <math.h>],
817 [isunordered(0.0,0.0);],, [ac_c99_math=no])
818 AC_MSG_RESULT($ac_c99_math)
820 # Check for the existence in <stdio.h> of vscanf, et. al.
822 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
823 AC_TRY_COMPILE([#include <stdio.h>],
824 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
825 AC_TRY_COMPILE([#include <stdio.h>
827 void foo(char* fmt, ...)
828 {va_list args; va_start(args, fmt);
829 vfscanf(stderr, "%i", args);}],
830 [],, [ac_c99_stdio=no])
831 AC_TRY_COMPILE([#include <stdio.h>
833 void foo(char* fmt, ...)
834 {va_list args; va_start(args, fmt);
835 vscanf("%i", args);}],
836 [],, [ac_c99_stdio=no])
837 AC_TRY_COMPILE([#include <stdio.h>
839 void foo(char* fmt, ...)
840 {va_list args; va_start(args, fmt);
841 vsnprintf(fmt, 0, "%i", args);}],
842 [],, [ac_c99_stdio=no])
843 AC_TRY_COMPILE([#include <stdio.h>
845 void foo(char* fmt, ...)
846 {va_list args; va_start(args, fmt);
847 vsscanf(fmt, "%i", args);}],
848 [],, [ac_c99_stdio=no])
849 AC_MSG_RESULT($ac_c99_stdio)
851 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
853 AC_MSG_CHECKING([for lldiv_t declaration])
854 AC_CACHE_VAL(ac_c99_lldiv_t, [
855 AC_TRY_COMPILE([#include <stdlib.h>],
857 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
859 AC_MSG_RESULT($ac_c99_lldiv_t)
861 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
862 AC_TRY_COMPILE([#include <stdlib.h>],
863 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
864 AC_TRY_COMPILE([#include <stdlib.h>],
865 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
866 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
867 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
868 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
869 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
870 if test x"$ac_c99_lldiv_t" = x"no"; then
873 AC_MSG_RESULT($ac_c99_stdlib)
875 # Check for the existence of <wchar.h> functions used if C99 is enabled.
876 # XXX the wchar.h checks should be rolled into the general C99 bits.
878 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
879 AC_TRY_COMPILE([#include <wchar.h>],
880 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
881 AC_TRY_COMPILE([#include <wchar.h>],
882 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
883 AC_TRY_COMPILE([#include <wchar.h>],
884 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
885 AC_MSG_RESULT($ac_c99_wchar)
887 AC_MSG_CHECKING([for enabled ISO C99 support])
888 if test x"$ac_c99_math" = x"no" ||
889 test x"$ac_c99_stdio" = x"no" ||
890 test x"$ac_c99_stdlib" = x"no" ||
891 test x"$ac_c99_wchar" = x"no"; then
894 AC_MSG_RESULT($enable_c99)
896 # Option parsed, now set things appropriately
897 if test x"$enable_c99" = x"yes"; then
898 AC_DEFINE(_GLIBCXX_USE_C99)
906 dnl Check for what type of C headers to use.
908 dnl --enable-cheaders= [does stuff].
909 dnl --disable-cheaders [does not do anything, really].
910 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
911 dnl Where DEFAULT is either `c' or `c_std'.
913 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
914 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
915 [construct "C" headers for g++], [permit c|c_std])
916 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
918 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
920 AC_SUBST(C_INCLUDE_DIR)
921 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
922 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
923 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
928 dnl Check for which locale library to use. The choice is mapped to
929 dnl a subdirectory of config/locale.
931 dnl Default is generic.
933 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
934 AC_MSG_CHECKING([for C locale to use])
935 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
936 [use MODEL for target locale package],
937 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
939 # If they didn't use this option switch, or if they specified --enable
940 # with no specific model, we'll have to look for one. If they
941 # specified --disable (???), do likewise.
942 if test $enable_clocale = no || test $enable_clocale = yes; then
946 # Either a known package, or "auto"
947 enable_clocale_flag=$enable_clocale
949 # Probe for locale support if no specific model is specified.
950 # Default to "generic".
951 if test $enable_clocale_flag = auto; then
952 case x${target_os} in
954 AC_EGREP_CPP([_GLIBCXX_ok], [
955 #include <features.h>
956 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
959 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
961 # Test for bugs early in glibc-2.2.x series
962 if test x$enable_clocale_flag = xgnu; then
964 #define _GNU_SOURCE 1
967 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
968 extern __typeof(newlocale) __newlocale;
969 extern __typeof(duplocale) __duplocale;
970 extern __typeof(strcoll_l) __strcoll_l;
974 const char __one[] = "Äuglein Augmen";
975 const char __two[] = "Äuglein";
980 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
981 loc_dup = __duplocale(loc);
982 i = __strcoll_l(__one, __two, loc);
983 j = __strcoll_l(__one, __two, loc_dup);
987 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
988 [enable_clocale_flag=generic])
991 # ... at some point put __strxfrm_l tests in as well.
994 enable_clocale_flag=generic
999 # Deal with gettext issues. Default to not using it (=no) until we detect
1000 # support for it later. Let the user turn it off via --e/d, but let that
1001 # default to on for easier handling.
1004 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1008 # Set configure bits for specified locale package
1009 case ${enable_clocale_flag} in
1011 AC_MSG_RESULT(generic)
1013 CLOCALE_H=config/locale/generic/c_locale.h
1014 CLOCALE_CC=config/locale/generic/c_locale.cc
1015 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1016 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1017 CCOLLATE_CC=config/locale/generic/collate_members.cc
1018 CCTYPE_CC=config/locale/generic/ctype_members.cc
1019 CMESSAGES_H=config/locale/generic/messages_members.h
1020 CMESSAGES_CC=config/locale/generic/messages_members.cc
1021 CMONEY_CC=config/locale/generic/monetary_members.cc
1022 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1023 CTIME_H=config/locale/generic/time_members.h
1024 CTIME_CC=config/locale/generic/time_members.cc
1025 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1030 # Declare intention to use gettext, and add support for specific
1032 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1035 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1036 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1037 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1040 # Export the build objects.
1041 for ling in $ALL_LINGUAS; do \
1042 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1043 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1045 AC_SUBST(glibcxx_MOFILES)
1046 AC_SUBST(glibcxx_POFILES)
1048 CLOCALE_H=config/locale/gnu/c_locale.h
1049 CLOCALE_CC=config/locale/gnu/c_locale.cc
1050 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1051 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1052 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1053 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1054 CMESSAGES_H=config/locale/gnu/messages_members.h
1055 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1056 CMONEY_CC=config/locale/gnu/monetary_members.cc
1057 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1058 CTIME_H=config/locale/gnu/time_members.h
1059 CTIME_CC=config/locale/gnu/time_members.cc
1060 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1063 AC_MSG_RESULT(IEEE 1003.1)
1065 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1066 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1067 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1068 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1069 CCOLLATE_CC=config/locale/generic/collate_members.cc
1070 CCTYPE_CC=config/locale/generic/ctype_members.cc
1071 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1072 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1073 CMONEY_CC=config/locale/generic/monetary_members.cc
1074 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1075 CTIME_H=config/locale/generic/time_members.h
1076 CTIME_CC=config/locale/generic/time_members.cc
1077 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1081 # This is where the testsuite looks for locale catalogs, using the
1082 # -DLOCALEDIR define during testsuite compilation.
1083 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1084 AC_SUBST(glibcxx_localedir)
1086 # A standalone libintl (e.g., GNU libintl) may be in use.
1087 if test $USE_NLS = yes; then
1088 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1089 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1091 if test $USE_NLS = yes; then
1092 AC_DEFINE(_GLIBCXX_USE_NLS)
1097 AC_SUBST(CCODECVT_H)
1098 AC_SUBST(CMESSAGES_H)
1099 AC_SUBST(CCODECVT_CC)
1100 AC_SUBST(CCOLLATE_CC)
1102 AC_SUBST(CMESSAGES_CC)
1104 AC_SUBST(CNUMERIC_CC)
1107 AC_SUBST(CLOCALE_CC)
1108 AC_SUBST(CLOCALE_INTERNAL_H)
1113 dnl Check for whether the Boost-derived checks should be turned on.
1115 dnl --enable-concept-checks turns them on.
1116 dnl --disable-concept-checks leaves them off.
1117 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1118 dnl Where DEFAULT is either `yes' or `no'.
1120 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1121 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1122 if test $enable_concept_checks = yes; then
1123 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1129 dnl Check for which I/O library to use: stdio, or something specific.
1131 dnl Default is stdio.
1133 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1134 AC_MSG_CHECKING([for underlying I/O to use])
1135 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1136 [use target-specific I/O package], [permit stdio])
1138 # Now that libio has been removed, you can have any color you want as long
1139 # as it's black. This is one big no-op until other packages are added, but
1140 # showing the framework never hurts.
1141 case ${enable_cstdio} in
1143 CSTDIO_H=config/io/c_io_stdio.h
1144 BASIC_FILE_H=config/io/basic_file_stdio.h
1145 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1146 AC_MSG_RESULT(stdio)
1150 dnl Set directory for fpos.h
1151 FPOS_H=$fpos_include_dir
1155 AC_SUBST(BASIC_FILE_H)
1156 AC_SUBST(BASIC_FILE_CC)
1161 dnl Check for "unusual" flags to pass to the compiler while building.
1163 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1164 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1165 dnl --disable-cxx-flags passes nothing.
1166 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1167 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1168 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1169 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1170 dnl If "default flags" is an empty string, the effect is the same
1171 dnl as --disable or --enable=no.
1173 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1174 AC_MSG_CHECKING([for extra compiler flags for building])
1175 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1176 [pass compiler FLAGS when building library],
1177 [case "x$enable_cxx_flags" in
1178 xno | x) enable_cxx_flags= ;;
1180 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1183 # Run through flags (either default or command-line) and set anything
1184 # extra (e.g., #defines) that must accompany particular g++ options.
1185 if test -n "$enable_cxx_flags"; then
1186 for f in $enable_cxx_flags; do
1190 *) # and we're trying to pass /what/ exactly?
1191 AC_MSG_ERROR([compiler flags start with a -]) ;;
1196 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1197 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1198 AC_SUBST(EXTRA_CXX_FLAGS)
1203 dnl Check for wide character support. Has the same effect as the option
1204 dnl in gcc's configure, but in a form that autoconf can mess with.
1206 dnl --enable-c-mbchar requests all the wchar_t stuff.
1207 dnl --disable-c-mbchar doesn't.
1208 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1209 dnl Where DEFAULT is either `yes' or `no'.
1211 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1212 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1213 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1218 dnl Check to see if debugging libraries are to be built.
1220 dnl --enable-libstdcxx-debug
1221 dnl builds a separate set of debugging libraries in addition to the
1222 dnl normal (shared, static) libstdc++ binaries.
1224 dnl --disable-libstdcxx-debug
1225 dnl builds only one (non-debug) version of libstdc++.
1227 dnl --enable-libstdcxx-debug-flags=FLAGS
1228 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1230 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1231 dnl Where DEFAULT is either `yes' or `no'.
1233 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1234 AC_MSG_CHECKING([for additional debug build])
1235 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1236 AC_MSG_RESULT($enable_libstdcxx_debug)
1237 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1242 dnl Check for explicit debug flags.
1244 dnl --enable-libstdcxx-debug-flags='-O1'
1245 dnl is a general method for passing flags to be used when
1246 dnl building debug libraries with --enable-debug.
1248 dnl --disable-libstdcxx-debug-flags does nothing.
1249 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1250 dnl If "default flags" is an empty string, the effect is the same
1251 dnl as --disable or --enable=no.
1253 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1254 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1255 [pass compiler FLAGS when building debug library],
1256 [case "x$enable_libstdcxx_debug_flags" in
1257 xno | x) enable_libstdcxx_debug_flags= ;;
1259 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1262 # Option parsed, now set things appropriately
1263 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1264 AC_SUBST(DEBUG_FLAGS)
1266 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1271 dnl Check if the user only wants a freestanding library implementation.
1273 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1274 dnl installing only the headers required by [17.4.1.3] and the language
1275 dnl support library. More than that will be built (to keep the Makefiles
1276 dnl conveniently clean), but not installed.
1279 dnl is_hosted (yes/no)
1281 AC_DEFUN(GLIBCXX_ENABLE_HOSTED, [
1282 AC_ARG_ENABLE([hosted-libstdcxx],
1283 AC_HELP_STRING([--disable-hosted-libstdcxx],
1284 [only build freestanding C++ runtime support]),,
1285 [enable_hosted_libstdcxx=yes])
1286 if test "$enable_hosted_libstdcxx" = no; then
1287 AC_MSG_NOTICE([Only freestanding libraries will be built])
1290 enable_libstdcxx_pch=no
1294 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1299 dnl Check for libunwind exception handling support. If enabled, then
1300 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1301 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1302 dnl libunwind instead of libgcc, and that libstdc++ has a dependency
1303 dnl on libunwind as well as libgcc.
1305 dnl --enable-libunwind-exceptions forces the use of libunwind.
1306 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1311 AC_DEFUN(GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS, [
1312 AC_MSG_CHECKING([for use of libunwind])
1313 GLIBCXX_ENABLE(libunwind-exceptions,no,,
1314 [force use of libunwind for exceptions])
1315 AC_MSG_RESULT($use_libunwind_exceptions)
1316 if test $enable_libunwind_exceptions = yes; then
1317 LIBUNWIND_FLAG="-lunwind"
1321 AC_SUBST(LIBUNWIND_FLAG)
1326 dnl Check for template specializations for the 'long long' type extension.
1327 dnl The result determines only whether 'long long' I/O is enabled; things
1328 dnl like numeric_limits<> specializations are always available.
1330 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1331 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1332 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1333 dnl Where DEFAULT is either `yes' or `no'.
1334 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1336 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1337 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1342 AC_MSG_CHECKING([for enabled long long I/O support])
1343 # iostreams require strtoll, strtoull to compile
1344 AC_TRY_COMPILE([#include <stdlib.h>],
1345 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1346 AC_TRY_COMPILE([#include <stdlib.h>],
1347 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1349 # Option parsed, now set things appropriately
1350 if test $enable_long_long = yes; then
1351 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1353 AC_MSG_RESULT($enable_long_long)
1360 dnl Check to see if building and using a C++ precompiled header can be done.
1362 dnl --enable-libstdcxx-pch=yes
1363 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1364 dnl may work, after some light-hearted attempts to puzzle out compiler
1365 dnl support, flip bits on in include/Makefile.am
1367 dnl --disable-libstdcxx-pch
1368 dnl turns off attempts to use or build stdc++.h.gch.
1371 dnl glibcxx_PCHFLAGS
1373 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1374 AC_MSG_CHECKING([for enabled PCH])
1375 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1376 AC_MSG_RESULT([$enable_libstdcxx_pch])
1378 if test $enable_libstdcxx_pch = yes; then
1379 AC_CACHE_CHECK([for compiler with PCH support],
1380 [glibcxx_cv_prog_CXX_pch],
1381 [ac_save_CXXFLAGS="$CXXFLAGS"
1382 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1385 echo '#include <math.h>' > conftest.h
1386 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1387 -o conftest.h.gch 1>&5 2>&1 &&
1388 echo '#error "pch failed"' > conftest.h &&
1389 echo '#include "conftest.h"' > conftest.cc &&
1390 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1392 glibcxx_cv_prog_CXX_pch=yes
1394 glibcxx_cv_prog_CXX_pch=no
1397 CXXFLAGS=$ac_save_CXXFLAGS
1400 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1403 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1404 if test $enable_libstdcxx_pch = yes; then
1405 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1409 AC_SUBST(glibcxx_PCHFLAGS)
1414 dnl Check for exception handling support. If an explicit enable/disable
1415 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1416 dnl target may or may not support call frame exceptions.
1418 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1419 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1420 dnl Neither one forces an attempt at detection.
1423 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1425 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1426 AC_MSG_CHECKING([for exception model to use])
1429 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1430 [force use of builtin_setjmp for exceptions],
1431 [permit yes|no|auto])
1433 if test $enable_sjlj_exceptions = auto; then
1434 # Botheration. Now we've got to detect the exception model. Link tests
1435 # against libgcc.a are problematic since we've not been given proper -L
1436 # bits for single-tree newlib and libgloss.
1438 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1439 cat > conftest.$ac_ext << EOF
1440 [#]line __oline__ "configure"
1449 old_CXXFLAGS="$CXXFLAGS"
1451 if AC_TRY_EVAL(ac_compile); then
1452 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1453 enable_sjlj_exceptions=yes
1454 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1455 enable_sjlj_exceptions=no
1458 CXXFLAGS="$old_CXXFLAGS"
1462 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1463 # to two different models.
1464 case $enable_sjlj_exceptions in
1466 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1467 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1468 ac_exception_model_name=sjlj
1471 ac_exception_model_name="call frame"
1474 AC_MSG_ERROR([unable to detect exception model])
1478 AC_MSG_RESULT($ac_exception_model_name)
1483 dnl Add version tags to symbols in shared library (or not), additionally
1484 dnl marking other symbols as private/local (or not).
1486 dnl --enable-symvers=style adds a version script to the linker call when
1487 dnl creating the shared library. The choice of version script is
1488 dnl controlled by 'style'.
1489 dnl --disable-symvers does not.
1490 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1491 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1492 dnl choose a default style based on linker characteristics. Passing
1493 dnl 'no' disables versioning.
1495 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1497 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1498 [enables symbol versioning of the shared library],
1499 [permit yes|no|gnu])
1501 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1502 # don't know enough about $LD to do tricks...
1503 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1504 # FIXME The following test is too strict, in theory.
1505 if test $enable_shared = no ||
1507 test x$glibcxx_gnu_ld_version = x; then
1511 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1512 if test $enable_symvers != no; then
1513 AC_MSG_CHECKING([for shared libgcc])
1514 ac_save_CFLAGS="$CFLAGS"
1516 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1517 CFLAGS="$ac_save_CFLAGS"
1518 AC_MSG_RESULT($glibcxx_shared_libgcc)
1521 # For GNU ld, we need at least this version. The format is described in
1522 # GLIBCXX_CHECK_LINKER_FEATURES above.
1523 glibcxx_min_gnu_ld_version=21400
1524 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1526 # Check to see if unspecified "yes" value can win, given results above.
1527 # Change "yes" into either "no" or a style name.
1528 if test $enable_symvers = yes; then
1529 if test $with_gnu_ld = yes &&
1530 test $glibcxx_shared_libgcc = yes;
1532 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1535 # The right tools, the right setup, but too old. Fallbacks?
1536 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1537 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1538 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1539 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1540 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1541 # Globbing fix is present, proper block support is not.
1542 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1543 dnl enable_symvers=???
1544 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1548 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1554 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1555 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1556 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1557 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1562 # Everything parsed; figure out what file to use.
1563 case $enable_symvers in
1565 SYMVER_MAP=config/linker-map.dummy
1568 SYMVER_MAP=config/linker-map.gnu
1569 AC_DEFINE(_GLIBCXX_SYMVER)
1573 AC_SUBST(SYMVER_MAP)
1574 AC_SUBST(port_specific_symbol_files)
1575 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1576 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1581 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1582 dnl We must stage the required headers so that they will be installed
1583 dnl with the library (unlike libgcc, the STL implementation is provided
1584 dnl solely within headers). Since we must not inject random user-space
1585 dnl macro names into user-provided C++ code, we first stage into <file>-in
1586 dnl and process to <file> with an output command. The reason for a two-
1587 dnl stage process here is to correctly handle $srcdir!=$objdir without
1588 dnl having to write complex code (the sed commands to clean the macro
1589 dnl namespace are complex and fragile enough as it is). We must also
1590 dnl add a relative path so that -I- is supported properly.
1593 dnl glibcxx_thread_h
1596 dnl HAVE_GTHR_DEFAULT
1597 dnl _GLIBCXX_SUPPORTS_WEAK
1599 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1600 AC_MSG_CHECKING([for thread model used by GCC])
1601 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1602 AC_MSG_RESULT([$target_thread_file])
1604 if test $target_thread_file != single; then
1605 AC_DEFINE(HAVE_GTHR_DEFAULT)
1606 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1609 glibcxx_thread_h=gthr-$target_thread_file.h
1610 AC_SUBST(glibcxx_thread_h)
1614 # Check whether LC_MESSAGES is available in <locale.h>.
1615 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1617 # This file file be copied and used freely without restrictions. It can
1618 # be used in projects which are not available under the GNU Public License
1619 # but which still want to provide support for the GNU gettext functionality.
1620 # Please note that the actual code is *not* freely available.
1623 AC_DEFUN(AC_LC_MESSAGES, [
1624 AC_CHECK_HEADER(locale.h, [
1625 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1626 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1627 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1628 if test $ac_cv_val_LC_MESSAGES = yes; then
1629 AC_DEFINE(HAVE_LC_MESSAGES)
1635 sinclude([../libtool.m4])
1636 dnl The lines below arrange for aclocal not to bring an installed
1637 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1638 dnl add a definition of LIBTOOL to Makefile.in.
1639 ifelse(,,,[AC_SUBST(LIBTOOL)
1640 AC_DEFUN([AM_PROG_LIBTOOL])
1641 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1642 AC_DEFUN([AC_PROG_LD])
1645 dnl vim:et:ts=2:sw=2