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)
589 if test $enable_symvers = no; then
594 enable_abi_check=no ;;
596 enable_abi_check=yes ;;
600 # Only build this as native, since automake does not understand
605 # Export file names for ABI checking.
606 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
607 AC_SUBST(baseline_dir)
609 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
610 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
615 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
619 dnl TOPLEVEL_INCLUDES
621 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
622 # Used for every C++ compile we perform.
624 -I$glibcxx_builddir/include/$host_alias \
625 -I$glibcxx_builddir/include \
626 -I$glibcxx_srcdir/libsupc++"
628 # For Canadian crosses, pick this up too.
629 if test $CANADIAN = yes; then
630 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
633 # Stuff in the actual top level. Currently only used by libsupc++ to
634 # get unwind* headers from the gcc dir.
635 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
636 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
638 # Now, export this to all the little Makefiles....
639 AC_SUBST(GLIBCXX_INCLUDES)
640 AC_SUBST(TOPLEVEL_INCLUDES)
645 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
646 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
649 dnl OPTIMIZE_CXXFLAGS
652 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
653 # Optimization flags that are probably a good idea for thrill-seekers. Just
654 # uncomment the lines below and make, everything else is ready to go...
655 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
657 AC_SUBST(OPTIMIZE_CXXFLAGS)
659 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings'
665 dnl All installation directory information is determined here.
669 dnl glibcxx_prefixdir
670 dnl glibcxx_toolexecdir
671 dnl glibcxx_toolexeclibdir
673 dnl Assumes cross_compiling bits already done, and with_cross_host in
676 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
677 glibcxx_toolexecdir=no
678 glibcxx_toolexeclibdir=no
679 glibcxx_prefixdir=$prefix
681 AC_MSG_CHECKING([for gxx-include-dir])
682 AC_ARG_WITH([gxx-include-dir],
683 AC_HELP_STRING([--with-gxx-include-dir=DIR],
684 [installation directory for include files]),
686 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
687 no) gxx_include_dir=no ;;
688 *) gxx_include_dir=$withval ;;
690 [gxx_include_dir=no])
691 AC_MSG_RESULT($gxx_include_dir)
693 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
694 AC_ARG_ENABLE([version-specific-runtime-libs],
695 AC_HELP_STRING([--enable-version-specific-runtime-libs],
696 [Specify that runtime libraries should be installed in a compiler-specific directory]),
697 [case "$enableval" in
698 yes) version_specific_libs=yes ;;
699 no) version_specific_libs=no ;;
700 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
702 [version_specific_libs=no])
703 AC_MSG_RESULT($version_specific_libs)
705 # Default case for install directory for include files.
706 if test $version_specific_libs = no && test $gxx_include_dir = no; then
707 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
710 # Version-specific runtime libs processing.
711 if test $version_specific_libs = yes; then
712 # Need the gcc compiler version to know where to install libraries
713 # and header files if --enable-version-specific-runtime-libs option
715 if test x"$gxx_include_dir" = x"no"; then
716 gxx_include_dir='${libdir}/gcc-lib/${host_alias}/'$gcc_version/include/c++
718 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
719 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
722 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
723 # Install a library built with a cross compiler in tooldir, not libdir.
724 if test x"$glibcxx_toolexecdir" = x"no"; then
725 if test -n "$with_cross_host" &&
726 test x"$with_cross_host" != x"no"; then
727 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
728 glibcxx_toolexeclibdir='${toolexecdir}/lib'
730 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
731 glibcxx_toolexeclibdir='${libdir}'
733 multi_os_directory=`$CXX -print-multi-os-directory`
734 case $multi_os_directory in
735 .) ;; # Avoid trailing /.
736 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
740 AC_MSG_CHECKING([for install location])
741 AC_MSG_RESULT($gxx_include_dir)
743 AC_SUBST(glibcxx_prefixdir)
744 AC_SUBST(gxx_include_dir)
745 AC_SUBST(glibcxx_toolexecdir)
746 AC_SUBST(glibcxx_toolexeclibdir)
752 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
753 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
754 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
756 dnl See docs/html/17_intro/configury.html#enable for documentation.
758 m4_define([GLIBCXX_ENABLE],[dnl
759 m4_define([_g_switch],[--enable-$1])dnl
760 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
761 AC_ARG_ENABLE($1,_g_help,
766 m4_bpatsubst([$5],[permit ])) ;;
767 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
768 dnl Idea for future: generate a URL pointing to
769 dnl "onlinedocs/configopts.html#whatever"
776 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
780 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
781 m4_undefine([_g_switch])dnl
782 m4_undefine([_g_help])dnl
787 dnl Check for ISO/IEC 9899:1999 "C99" support.
789 dnl --enable-c99 defines _GLIBCXX_USE_C99
790 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
791 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
792 dnl Where DEFAULT is either `yes' or `no'.
793 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
795 AC_DEFUN(GLIBCXX_ENABLE_C99, [
796 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
801 # Check for the existence of <math.h> functions used if C99 is enabled.
803 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
804 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
805 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
806 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
807 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
808 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
809 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
810 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
811 AC_TRY_COMPILE([#include <math.h>],
812 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
813 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
814 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
815 AC_TRY_COMPILE([#include <math.h>],
816 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
817 AC_TRY_COMPILE([#include <math.h>],
818 [isunordered(0.0,0.0);],, [ac_c99_math=no])
819 AC_MSG_RESULT($ac_c99_math)
821 # Check for the existence in <stdio.h> of vscanf, et. al.
823 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
824 AC_TRY_COMPILE([#include <stdio.h>],
825 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
826 AC_TRY_COMPILE([#include <stdio.h>
828 void foo(char* fmt, ...)
829 {va_list args; va_start(args, fmt);
830 vfscanf(stderr, "%i", args);}],
831 [],, [ac_c99_stdio=no])
832 AC_TRY_COMPILE([#include <stdio.h>
834 void foo(char* fmt, ...)
835 {va_list args; va_start(args, fmt);
836 vscanf("%i", args);}],
837 [],, [ac_c99_stdio=no])
838 AC_TRY_COMPILE([#include <stdio.h>
840 void foo(char* fmt, ...)
841 {va_list args; va_start(args, fmt);
842 vsnprintf(fmt, 0, "%i", args);}],
843 [],, [ac_c99_stdio=no])
844 AC_TRY_COMPILE([#include <stdio.h>
846 void foo(char* fmt, ...)
847 {va_list args; va_start(args, fmt);
848 vsscanf(fmt, "%i", args);}],
849 [],, [ac_c99_stdio=no])
850 AC_MSG_RESULT($ac_c99_stdio)
852 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
854 AC_MSG_CHECKING([for lldiv_t declaration])
855 AC_CACHE_VAL(ac_c99_lldiv_t, [
856 AC_TRY_COMPILE([#include <stdlib.h>],
858 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
860 AC_MSG_RESULT($ac_c99_lldiv_t)
862 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
863 AC_TRY_COMPILE([#include <stdlib.h>],
864 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
865 AC_TRY_COMPILE([#include <stdlib.h>],
866 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
867 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
868 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
869 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
870 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
871 if test x"$ac_c99_lldiv_t" = x"no"; then
874 AC_MSG_RESULT($ac_c99_stdlib)
876 # Check for the existence of <wchar.h> functions used if C99 is enabled.
877 # XXX the wchar.h checks should be rolled into the general C99 bits.
879 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
880 AC_TRY_COMPILE([#include <wchar.h>],
881 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
882 AC_TRY_COMPILE([#include <wchar.h>],
883 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
884 AC_TRY_COMPILE([#include <wchar.h>],
885 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
886 AC_MSG_RESULT($ac_c99_wchar)
888 AC_MSG_CHECKING([for enabled ISO C99 support])
889 if test x"$ac_c99_math" = x"no" ||
890 test x"$ac_c99_stdio" = x"no" ||
891 test x"$ac_c99_stdlib" = x"no" ||
892 test x"$ac_c99_wchar" = x"no"; then
895 AC_MSG_RESULT($enable_c99)
897 # Option parsed, now set things appropriately
898 if test x"$enable_c99" = x"yes"; then
899 AC_DEFINE(_GLIBCXX_USE_C99)
907 dnl Check for what type of C headers to use.
909 dnl --enable-cheaders= [does stuff].
910 dnl --disable-cheaders [does not do anything, really].
911 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
912 dnl Where DEFAULT is either `c' or `c_std'.
914 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
915 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
916 [construct "C" headers for g++], [permit c|c_std])
917 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
919 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
921 AC_SUBST(C_INCLUDE_DIR)
922 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
923 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
924 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
929 dnl Check for which locale library to use. The choice is mapped to
930 dnl a subdirectory of config/locale.
932 dnl Default is generic.
934 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
935 AC_MSG_CHECKING([for C locale to use])
936 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
937 [use MODEL for target locale package],
938 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
940 # If they didn't use this option switch, or if they specified --enable
941 # with no specific model, we'll have to look for one. If they
942 # specified --disable (???), do likewise.
943 if test $enable_clocale = no || test $enable_clocale = yes; then
947 # Either a known package, or "auto"
948 enable_clocale_flag=$enable_clocale
950 # Probe for locale support if no specific model is specified.
951 # Default to "generic".
952 if test $enable_clocale_flag = auto; then
953 case x${target_os} in
955 AC_EGREP_CPP([_GLIBCXX_ok], [
956 #include <features.h>
957 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
960 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
962 # Test for bugs early in glibc-2.2.x series
963 if test x$enable_clocale_flag = xgnu; then
965 #define _GNU_SOURCE 1
968 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
969 extern __typeof(newlocale) __newlocale;
970 extern __typeof(duplocale) __duplocale;
971 extern __typeof(strcoll_l) __strcoll_l;
975 const char __one[] = "Äuglein Augmen";
976 const char __two[] = "Äuglein";
981 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
982 loc_dup = __duplocale(loc);
983 i = __strcoll_l(__one, __two, loc);
984 j = __strcoll_l(__one, __two, loc_dup);
988 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
989 [enable_clocale_flag=generic])
992 # ... at some point put __strxfrm_l tests in as well.
995 enable_clocale_flag=generic
1000 # Deal with gettext issues. Default to not using it (=no) until we detect
1001 # support for it later. Let the user turn it off via --e/d, but let that
1002 # default to on for easier handling.
1005 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1009 # Set configure bits for specified locale package
1010 case ${enable_clocale_flag} in
1012 AC_MSG_RESULT(generic)
1014 CLOCALE_H=config/locale/generic/c_locale.h
1015 CLOCALE_CC=config/locale/generic/c_locale.cc
1016 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1017 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1018 CCOLLATE_CC=config/locale/generic/collate_members.cc
1019 CCTYPE_CC=config/locale/generic/ctype_members.cc
1020 CMESSAGES_H=config/locale/generic/messages_members.h
1021 CMESSAGES_CC=config/locale/generic/messages_members.cc
1022 CMONEY_CC=config/locale/generic/monetary_members.cc
1023 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1024 CTIME_H=config/locale/generic/time_members.h
1025 CTIME_CC=config/locale/generic/time_members.cc
1026 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1031 # Declare intention to use gettext, and add support for specific
1033 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1036 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1037 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1038 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1041 # Export the build objects.
1042 for ling in $ALL_LINGUAS; do \
1043 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1044 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1046 AC_SUBST(glibcxx_MOFILES)
1047 AC_SUBST(glibcxx_POFILES)
1049 CLOCALE_H=config/locale/gnu/c_locale.h
1050 CLOCALE_CC=config/locale/gnu/c_locale.cc
1051 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1052 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1053 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1054 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1055 CMESSAGES_H=config/locale/gnu/messages_members.h
1056 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1057 CMONEY_CC=config/locale/gnu/monetary_members.cc
1058 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1059 CTIME_H=config/locale/gnu/time_members.h
1060 CTIME_CC=config/locale/gnu/time_members.cc
1061 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1064 AC_MSG_RESULT(IEEE 1003.1)
1066 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1067 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1068 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1069 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1070 CCOLLATE_CC=config/locale/generic/collate_members.cc
1071 CCTYPE_CC=config/locale/generic/ctype_members.cc
1072 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1073 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1074 CMONEY_CC=config/locale/generic/monetary_members.cc
1075 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1076 CTIME_H=config/locale/generic/time_members.h
1077 CTIME_CC=config/locale/generic/time_members.cc
1078 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1082 # This is where the testsuite looks for locale catalogs, using the
1083 # -DLOCALEDIR define during testsuite compilation.
1084 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1085 AC_SUBST(glibcxx_localedir)
1087 # A standalone libintl (e.g., GNU libintl) may be in use.
1088 if test $USE_NLS = yes; then
1089 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1090 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1092 if test $USE_NLS = yes; then
1093 AC_DEFINE(_GLIBCXX_USE_NLS)
1098 AC_SUBST(CCODECVT_H)
1099 AC_SUBST(CMESSAGES_H)
1100 AC_SUBST(CCODECVT_CC)
1101 AC_SUBST(CCOLLATE_CC)
1103 AC_SUBST(CMESSAGES_CC)
1105 AC_SUBST(CNUMERIC_CC)
1108 AC_SUBST(CLOCALE_CC)
1109 AC_SUBST(CLOCALE_INTERNAL_H)
1114 dnl Check for whether the Boost-derived checks should be turned on.
1116 dnl --enable-concept-checks turns them on.
1117 dnl --disable-concept-checks leaves them off.
1118 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1119 dnl Where DEFAULT is either `yes' or `no'.
1121 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1122 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1123 if test $enable_concept_checks = yes; then
1124 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1130 dnl Check for which I/O library to use: stdio, or something specific.
1132 dnl Default is stdio.
1134 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1135 AC_MSG_CHECKING([for underlying I/O to use])
1136 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1137 [use target-specific I/O package], [permit stdio])
1139 # Now that libio has been removed, you can have any color you want as long
1140 # as it's black. This is one big no-op until other packages are added, but
1141 # showing the framework never hurts.
1142 case ${enable_cstdio} in
1144 CSTDIO_H=config/io/c_io_stdio.h
1145 BASIC_FILE_H=config/io/basic_file_stdio.h
1146 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1147 AC_MSG_RESULT(stdio)
1151 dnl Set directory for fpos.h
1152 FPOS_H=$fpos_include_dir
1156 AC_SUBST(BASIC_FILE_H)
1157 AC_SUBST(BASIC_FILE_CC)
1162 dnl Check for "unusual" flags to pass to the compiler while building.
1164 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1165 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1166 dnl --disable-cxx-flags passes nothing.
1167 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1168 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1169 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1170 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1171 dnl If "default flags" is an empty string, the effect is the same
1172 dnl as --disable or --enable=no.
1174 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1175 AC_MSG_CHECKING([for extra compiler flags for building])
1176 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1177 [pass compiler FLAGS when building library],
1178 [case "x$enable_cxx_flags" in
1179 xno | x) enable_cxx_flags= ;;
1181 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1184 # Run through flags (either default or command-line) and set anything
1185 # extra (e.g., #defines) that must accompany particular g++ options.
1186 if test -n "$enable_cxx_flags"; then
1187 for f in $enable_cxx_flags; do
1191 *) # and we're trying to pass /what/ exactly?
1192 AC_MSG_ERROR([compiler flags start with a -]) ;;
1197 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1198 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1199 AC_SUBST(EXTRA_CXX_FLAGS)
1204 dnl Check for wide character support. Has the same effect as the option
1205 dnl in gcc's configure, but in a form that autoconf can mess with.
1207 dnl --enable-c-mbchar requests all the wchar_t stuff.
1208 dnl --disable-c-mbchar doesn't.
1209 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1210 dnl Where DEFAULT is either `yes' or `no'.
1212 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1213 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1214 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1219 dnl Check to see if debugging libraries are to be built.
1221 dnl --enable-libstdcxx-debug
1222 dnl builds a separate set of debugging libraries in addition to the
1223 dnl normal (shared, static) libstdc++ binaries.
1225 dnl --disable-libstdcxx-debug
1226 dnl builds only one (non-debug) version of libstdc++.
1228 dnl --enable-libstdcxx-debug-flags=FLAGS
1229 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1231 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1232 dnl Where DEFAULT is either `yes' or `no'.
1234 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1235 AC_MSG_CHECKING([for additional debug build])
1236 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1237 AC_MSG_RESULT($enable_libstdcxx_debug)
1238 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1243 dnl Check for explicit debug flags.
1245 dnl --enable-libstdcxx-debug-flags='-O1'
1246 dnl is a general method for passing flags to be used when
1247 dnl building debug libraries with --enable-debug.
1249 dnl --disable-libstdcxx-debug-flags does nothing.
1250 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1251 dnl If "default flags" is an empty string, the effect is the same
1252 dnl as --disable or --enable=no.
1254 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1255 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1256 [pass compiler FLAGS when building debug library],
1257 [case "x$enable_libstdcxx_debug_flags" in
1258 xno | x) enable_libstdcxx_debug_flags= ;;
1260 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1263 # Option parsed, now set things appropriately
1264 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1265 AC_SUBST(DEBUG_FLAGS)
1267 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1272 dnl Check if the user only wants a freestanding library implementation.
1274 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1275 dnl installing only the headers required by [17.4.1.3] and the language
1276 dnl support library. More than that will be built (to keep the Makefiles
1277 dnl conveniently clean), but not installed.
1280 dnl is_hosted (yes/no)
1283 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1285 AC_DEFUN(GLIBCXX_ENABLE_HOSTED, [
1286 AC_ARG_ENABLE([hosted-libstdcxx],
1287 AC_HELP_STRING([--disable-hosted-libstdcxx],
1288 [only build freestanding C++ runtime support]),,
1289 [enable_hosted_libstdcxx=yes])
1290 if test "$enable_hosted_libstdcxx" = no; then
1291 AC_MSG_NOTICE([Only freestanding libraries will be built])
1295 enable_libstdcxx_pch=no
1300 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1301 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1302 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1307 dnl Check for libunwind exception handling support. If enabled, then
1308 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1309 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1310 dnl libunwind instead of libgcc, and that libstdc++ has a dependency
1311 dnl on libunwind as well as libgcc.
1313 dnl --enable-libunwind-exceptions forces the use of libunwind.
1314 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1319 AC_DEFUN(GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS, [
1320 AC_MSG_CHECKING([for use of libunwind])
1321 GLIBCXX_ENABLE(libunwind-exceptions,no,,
1322 [force use of libunwind for exceptions])
1323 AC_MSG_RESULT($use_libunwind_exceptions)
1324 if test $enable_libunwind_exceptions = yes; then
1325 LIBUNWIND_FLAG="-lunwind"
1329 AC_SUBST(LIBUNWIND_FLAG)
1334 dnl Check for template specializations for the 'long long' type extension.
1335 dnl The result determines only whether 'long long' I/O is enabled; things
1336 dnl like numeric_limits<> specializations are always available.
1338 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1339 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1340 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1341 dnl Where DEFAULT is either `yes' or `no'.
1342 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1344 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1345 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1350 AC_MSG_CHECKING([for enabled long long I/O support])
1351 # iostreams require strtoll, strtoull to compile
1352 AC_TRY_COMPILE([#include <stdlib.h>],
1353 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1354 AC_TRY_COMPILE([#include <stdlib.h>],
1355 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1357 # Option parsed, now set things appropriately
1358 if test $enable_long_long = yes; then
1359 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1361 AC_MSG_RESULT($enable_long_long)
1368 dnl Check to see if building and using a C++ precompiled header can be done.
1370 dnl --enable-libstdcxx-pch=yes
1371 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1372 dnl may work, after some light-hearted attempts to puzzle out compiler
1373 dnl support, flip bits on in include/Makefile.am
1375 dnl --disable-libstdcxx-pch
1376 dnl turns off attempts to use or build stdc++.h.gch.
1379 dnl glibcxx_PCHFLAGS
1381 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1382 AC_MSG_CHECKING([for enabled PCH])
1383 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1384 AC_MSG_RESULT([$enable_libstdcxx_pch])
1386 if test $enable_libstdcxx_pch = yes; then
1387 AC_CACHE_CHECK([for compiler with PCH support],
1388 [glibcxx_cv_prog_CXX_pch],
1389 [ac_save_CXXFLAGS="$CXXFLAGS"
1390 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1393 echo '#include <math.h>' > conftest.h
1394 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1395 -o conftest.h.gch 1>&5 2>&1 &&
1396 echo '#error "pch failed"' > conftest.h &&
1397 echo '#include "conftest.h"' > conftest.cc &&
1398 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1400 glibcxx_cv_prog_CXX_pch=yes
1402 glibcxx_cv_prog_CXX_pch=no
1405 CXXFLAGS=$ac_save_CXXFLAGS
1408 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1411 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1412 if test $enable_libstdcxx_pch = yes; then
1413 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1417 AC_SUBST(glibcxx_PCHFLAGS)
1422 dnl Check for exception handling support. If an explicit enable/disable
1423 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1424 dnl target may or may not support call frame exceptions.
1426 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1427 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1428 dnl Neither one forces an attempt at detection.
1431 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1433 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1434 AC_MSG_CHECKING([for exception model to use])
1437 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1438 [force use of builtin_setjmp for exceptions],
1439 [permit yes|no|auto])
1441 if test $enable_sjlj_exceptions = auto; then
1442 # Botheration. Now we've got to detect the exception model. Link tests
1443 # against libgcc.a are problematic since we've not been given proper -L
1444 # bits for single-tree newlib and libgloss.
1446 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1447 cat > conftest.$ac_ext << EOF
1448 [#]line __oline__ "configure"
1457 old_CXXFLAGS="$CXXFLAGS"
1459 if AC_TRY_EVAL(ac_compile); then
1460 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1461 enable_sjlj_exceptions=yes
1462 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1463 enable_sjlj_exceptions=no
1466 CXXFLAGS="$old_CXXFLAGS"
1470 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1471 # to two different models.
1472 case $enable_sjlj_exceptions in
1474 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1475 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1476 ac_exception_model_name=sjlj
1479 ac_exception_model_name="call frame"
1482 AC_MSG_ERROR([unable to detect exception model])
1486 AC_MSG_RESULT($ac_exception_model_name)
1491 dnl Add version tags to symbols in shared library (or not), additionally
1492 dnl marking other symbols as private/local (or not).
1494 dnl --enable-symvers=style adds a version script to the linker call when
1495 dnl creating the shared library. The choice of version script is
1496 dnl controlled by 'style'.
1497 dnl --disable-symvers does not.
1498 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1499 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1500 dnl choose a default style based on linker characteristics. Passing
1501 dnl 'no' disables versioning.
1503 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1505 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1506 [enables symbol versioning of the shared library],
1507 [permit yes|no|gnu])
1509 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1510 # don't know enough about $LD to do tricks...
1511 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1512 # FIXME The following test is too strict, in theory.
1513 if test $enable_shared = no ||
1515 test x$glibcxx_gnu_ld_version = x; then
1519 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1520 if test $enable_symvers != no; then
1521 AC_MSG_CHECKING([for shared libgcc])
1522 ac_save_CFLAGS="$CFLAGS"
1524 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1525 CFLAGS="$ac_save_CFLAGS"
1526 AC_MSG_RESULT($glibcxx_shared_libgcc)
1529 # For GNU ld, we need at least this version. The format is described in
1530 # GLIBCXX_CHECK_LINKER_FEATURES above.
1531 glibcxx_min_gnu_ld_version=21400
1532 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1534 # Check to see if unspecified "yes" value can win, given results above.
1535 # Change "yes" into either "no" or a style name.
1536 if test $enable_symvers = yes; then
1537 if test $with_gnu_ld = yes &&
1538 test $glibcxx_shared_libgcc = yes;
1540 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1543 # The right tools, the right setup, but too old. Fallbacks?
1544 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1545 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1546 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1547 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1548 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1549 # Globbing fix is present, proper block support is not.
1550 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1551 dnl enable_symvers=???
1552 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1556 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1562 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1563 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1564 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1565 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1570 # Everything parsed; figure out what file to use.
1571 case $enable_symvers in
1573 SYMVER_MAP=config/linker-map.dummy
1576 SYMVER_MAP=config/linker-map.gnu
1577 AC_DEFINE(_GLIBCXX_SYMVER)
1581 AC_SUBST(SYMVER_MAP)
1582 AC_SUBST(port_specific_symbol_files)
1583 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1584 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1589 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1590 dnl We must stage the required headers so that they will be installed
1591 dnl with the library (unlike libgcc, the STL implementation is provided
1592 dnl solely within headers). Since we must not inject random user-space
1593 dnl macro names into user-provided C++ code, we first stage into <file>-in
1594 dnl and process to <file> with an output command. The reason for a two-
1595 dnl stage process here is to correctly handle $srcdir!=$objdir without
1596 dnl having to write complex code (the sed commands to clean the macro
1597 dnl namespace are complex and fragile enough as it is). We must also
1598 dnl add a relative path so that -I- is supported properly.
1601 dnl glibcxx_thread_h
1604 dnl HAVE_GTHR_DEFAULT
1605 dnl _GLIBCXX_SUPPORTS_WEAK
1607 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1608 AC_MSG_CHECKING([for thread model used by GCC])
1609 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1610 AC_MSG_RESULT([$target_thread_file])
1612 if test $target_thread_file != single; then
1613 AC_DEFINE(HAVE_GTHR_DEFAULT)
1614 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1617 glibcxx_thread_h=gthr-$target_thread_file.h
1618 AC_SUBST(glibcxx_thread_h)
1622 # Check whether LC_MESSAGES is available in <locale.h>.
1623 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1625 # This file file be copied and used freely without restrictions. It can
1626 # be used in projects which are not available under the GNU Public License
1627 # but which still want to provide support for the GNU gettext functionality.
1628 # Please note that the actual code is *not* freely available.
1631 AC_DEFUN(AC_LC_MESSAGES, [
1632 AC_CHECK_HEADER(locale.h, [
1633 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1634 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1635 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1636 if test $ac_cv_val_LC_MESSAGES = yes; then
1637 AC_DEFINE(HAVE_LC_MESSAGES)
1643 sinclude([../libtool.m4])
1644 dnl The lines below arrange for aclocal not to bring an installed
1645 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1646 dnl add a definition of LIBTOOL to Makefile.in.
1647 ifelse(,,,[AC_SUBST(LIBTOOL)
1648 AC_DEFUN([AM_PROG_LIBTOOL])
1649 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1650 AC_DEFUN([AC_PROG_LD])
1653 dnl vim:et:ts=2:sw=2