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 $OPT_LDFLAGS"
325 AC_SUBST(SECTION_LDFLAGS)
326 AC_SUBST(OPT_LDFLAGS)
331 dnl Check to see if this target can enable the wchar_t parts.
332 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
333 dnl must have been previously checked.) By default, wide characters are
337 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
338 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
340 dnl LIBICONV to a -l string containing the iconv library, if needed.
342 AC_DEFUN([GLIBCXX_CHECK_WCHAR_T_SUPPORT], [
343 # Test wchar.h for mbstate_t, which is needed for char_traits and
344 # others even if wchar_t support is not on.
345 AC_MSG_CHECKING([for mbstate_t])
346 AC_TRY_COMPILE([#include <wchar.h>],
347 [mbstate_t teststate;],
348 have_mbstate_t=yes, have_mbstate_t=no)
349 AC_MSG_RESULT($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 vswprintf \
389 vwprintf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
390 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstol \
391 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
392 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
395 # Checks for wide character functions that are not required
396 # for basic wchar_t support. Don't disable support if they are missing.
397 # Injection of these is wrapped with guard macros.
398 AC_CHECK_FUNCS([vfwscanf vswscanf vwscanf wcstof iswblank],[],[])
400 AC_MSG_CHECKING([for ISO C99 wchar_t support])
401 if test x"$has_weof" = xyes &&
402 test x"$has_wchar_minmax" = xyes &&
403 test x"$ac_wfuncs" = xyes;
405 ac_isoC99_wchar_t=yes
409 AC_MSG_RESULT($ac_isoC99_wchar_t)
411 # Use iconv for wchar_t to char conversions. As such, check for
412 # X/Open Portability Guide, version 2 features (XPG2).
413 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
414 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
416 # Check for existence of libiconv.a providing XPG2 wchar_t support.
417 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
419 LIBS="$LIBS $LIBICONV"
422 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
423 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
427 AC_MSG_CHECKING([for XPG2 wchar_t support])
428 if test x"$ac_has_iconv_h" = xyes &&
429 test x"$ac_has_langinfo_h" = xyes &&
430 test x"$ac_XPG2funcs" = xyes;
436 AC_MSG_RESULT($ac_XPG2_wchar_t)
438 # At the moment, only enable wchar_t specializations if all the
439 # above support is present.
440 if test x"$ac_isoC99_wchar_t" = xyes &&
441 test x"$ac_XPG2_wchar_t" = xyes;
443 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
447 AC_MSG_CHECKING([for enabled wchar_t specializations])
448 AC_MSG_RESULT($enable_wchar_t)
453 dnl Check for headers for, and arguments to, the setrlimit() function.
454 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
457 dnl _GLIBCXX_MEM_LIMITS if we can set artificial limits on memory
458 dnl various HAVE_MEMLIMIT_* for individual limit names
460 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
463 #include <sys/time.h>
464 #include <sys/resource.h>
466 [ int f = RLIMIT_$1 ; ],
467 [glibcxx_mresult=1], [glibcxx_mresult=0])
468 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcxx_mresult,
469 [Only used in build directory testsuite_hooks.h.])
472 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
473 setrlimit_have_headers=yes
474 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
476 [setrlimit_have_headers=no])
477 # If don't have the headers, then we can't run the tests now, and we
478 # won't be seeing any of these during testsuite compilation.
479 if test $setrlimit_have_headers = yes; then
480 # Can't do these in a loop, else the resulting syntax is wrong.
481 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
482 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
483 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
484 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
486 # Check for rlimit, setrlimit.
487 AC_CACHE_VAL(ac_setrlimit, [
490 #include <sys/time.h>
491 #include <sys/resource.h>
495 [ac_setrlimit=yes], [ac_setrlimit=no])
499 AC_MSG_CHECKING([for testsuite memory limit support])
500 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
502 AC_DEFINE(_GLIBCXX_MEM_LIMITS)
506 AC_MSG_RESULT($ac_mem_limits)
511 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
512 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
514 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
515 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
517 [#include <sys/stat.h>],
520 S_ISREG(buffer.st_mode);],
521 [glibcxx_cv_S_ISREG=yes],
522 [glibcxx_cv_S_ISREG=no])
524 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
526 [#include <sys/stat.h>],
529 S_IFREG & buffer.st_mode;],
530 [glibcxx_cv_S_IFREG=yes],
531 [glibcxx_cv_S_IFREG=no])
533 if test $glibcxx_cv_S_ISREG = yes; then
534 AC_DEFINE(HAVE_S_ISREG)
535 elif test $glibcxx_cv_S_IFREG = yes; then
536 AC_DEFINE(HAVE_S_IFREG)
542 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
544 AC_DEFUN([GLIBCXX_CHECK_POLL], [
545 AC_CACHE_VAL(glibcxx_cv_POLL, [
548 [struct pollfd pfd[1];
549 pfd[0].events = POLLIN;
551 [glibcxx_cv_POLL=yes],
552 [glibcxx_cv_POLL=no])
554 if test $glibcxx_cv_POLL = yes; then
561 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
563 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
564 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
566 [#include <sys/uio.h>],
567 [struct iovec iov[2];
569 [glibcxx_cv_WRITEV=yes],
570 [glibcxx_cv_WRITEV=no])
572 if test $glibcxx_cv_WRITEV = yes; then
573 AC_DEFINE(HAVE_WRITEV)
579 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
581 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
582 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
584 [#include <stdint.h>],
586 [glibcxx_cv_INT64_T=yes],
587 [glibcxx_cv_INT64_T=no])
589 if test $glibcxx_cv_INT64_T = yes; then
590 AC_DEFINE(HAVE_INT64_T)
596 dnl Check whether LFS support is available.
598 AC_DEFUN([GLIBCXX_CHECK_LFS], [
601 ac_save_CXXFLAGS="$CXXFLAGS"
602 CXXFLAGS="$CXXFLAGS -fno-exceptions"
603 AC_CACHE_VAL(glibcxx_cv_LFS, [
610 fseeko64(fp, 0, SEEK_CUR);
612 lseek64(1, 0, SEEK_CUR);],
613 [glibcxx_cv_LFS=yes],
616 if test $glibcxx_cv_LFS = yes; then
617 AC_DEFINE(_GLIBCXX_USE_LFS)
619 CXXFLAGS="$ac_save_CXXFLAGS"
625 dnl Does any necessary configuration of the testsuite directory. Generates
626 dnl the testsuite_hooks.h header.
628 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
631 dnl enable_abi_check / GLIBCXX_TEST_ABI
635 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
636 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
637 # Do checks for memory limit functions.
638 GLIBCXX_CHECK_SETRLIMIT
640 # Look for setenv, so that extended locale tests can be performed.
641 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
643 if test $enable_symvers = no; then
648 enable_abi_check=no ;;
650 enable_abi_check=yes ;;
654 # Only build this as native, since automake does not understand
659 # Export file names for ABI checking.
660 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
661 AC_SUBST(baseline_dir)
663 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
664 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
669 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
673 dnl TOPLEVEL_INCLUDES
675 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
676 # Used for every C++ compile we perform.
678 -I$glibcxx_builddir/include/$host_alias \
679 -I$glibcxx_builddir/include \
680 -I$glibcxx_srcdir/libsupc++"
682 # For Canadian crosses, pick this up too.
683 if test $CANADIAN = yes; then
684 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
687 # Stuff in the actual top level. Currently only used by libsupc++ to
688 # get unwind* headers from the gcc dir.
689 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
690 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
692 # Now, export this to all the little Makefiles....
693 AC_SUBST(GLIBCXX_INCLUDES)
694 AC_SUBST(TOPLEVEL_INCLUDES)
699 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
700 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
703 dnl OPTIMIZE_CXXFLAGS
706 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
707 # Optimization flags that are probably a good idea for thrill-seekers. Just
708 # uncomment the lines below and make, everything else is ready to go...
709 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
711 AC_SUBST(OPTIMIZE_CXXFLAGS)
713 WARN_FLAGS='-Wall -W -Wwrite-strings -Wcast-qual'
719 dnl All installation directory information is determined here.
723 dnl glibcxx_prefixdir
724 dnl glibcxx_toolexecdir
725 dnl glibcxx_toolexeclibdir
727 dnl Assumes cross_compiling bits already done, and with_cross_host in
730 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
731 glibcxx_toolexecdir=no
732 glibcxx_toolexeclibdir=no
733 glibcxx_prefixdir=$prefix
735 AC_MSG_CHECKING([for gxx-include-dir])
736 AC_ARG_WITH([gxx-include-dir],
737 AC_HELP_STRING([--with-gxx-include-dir=DIR],
738 [installation directory for include files]),
740 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
741 no) gxx_include_dir=no ;;
742 *) gxx_include_dir=$withval ;;
744 [gxx_include_dir=no])
745 AC_MSG_RESULT($gxx_include_dir)
747 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
748 AC_ARG_ENABLE([version-specific-runtime-libs],
749 AC_HELP_STRING([--enable-version-specific-runtime-libs],
750 [Specify that runtime libraries should be installed in a compiler-specific directory]),
751 [case "$enableval" in
752 yes) version_specific_libs=yes ;;
753 no) version_specific_libs=no ;;
754 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
756 [version_specific_libs=no])
757 AC_MSG_RESULT($version_specific_libs)
759 # Default case for install directory for include files.
760 if test $version_specific_libs = no && test $gxx_include_dir = no; then
761 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
764 # Version-specific runtime libs processing.
765 if test $version_specific_libs = yes; then
766 # Need the gcc compiler version to know where to install libraries
767 # and header files if --enable-version-specific-runtime-libs option
768 # is selected. FIXME: these variables are misnamed, there are
769 # no executables installed in _toolexecdir or _toolexeclibdir.
770 if test x"$gxx_include_dir" = x"no"; then
771 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++
773 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
774 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
777 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
778 # Install a library built with a cross compiler in tooldir, not libdir.
779 if test x"$glibcxx_toolexecdir" = x"no"; then
780 if test -n "$with_cross_host" &&
781 test x"$with_cross_host" != x"no"; then
782 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
783 glibcxx_toolexeclibdir='${toolexecdir}/lib'
785 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
786 glibcxx_toolexeclibdir='${libdir}'
788 multi_os_directory=`$CXX -print-multi-os-directory`
789 case $multi_os_directory in
790 .) ;; # Avoid trailing /.
791 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
795 AC_MSG_CHECKING([for install location])
796 AC_MSG_RESULT($gxx_include_dir)
798 AC_SUBST(glibcxx_prefixdir)
799 AC_SUBST(gxx_include_dir)
800 AC_SUBST(glibcxx_toolexecdir)
801 AC_SUBST(glibcxx_toolexeclibdir)
807 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
808 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
809 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
811 dnl See docs/html/17_intro/configury.html#enable for documentation.
813 m4_define([GLIBCXX_ENABLE],[dnl
814 m4_define([_g_switch],[--enable-$1])dnl
815 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
816 AC_ARG_ENABLE($1,_g_help,
821 m4_bpatsubst([$5],[permit ])) ;;
822 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
823 dnl Idea for future: generate a URL pointing to
824 dnl "onlinedocs/configopts.html#whatever"
831 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
835 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
836 m4_undefine([_g_switch])dnl
837 m4_undefine([_g_help])dnl
842 dnl Check for ISO/IEC 9899:1999 "C99" support.
844 dnl --enable-c99 defines _GLIBCXX_USE_C99
845 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
846 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
847 dnl Where DEFAULT is either `yes' or `no'.
848 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
850 AC_DEFUN([GLIBCXX_ENABLE_C99], [
851 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
856 # Check for the existence of <math.h> functions used if C99 is enabled.
858 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
859 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
860 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
861 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
862 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
863 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
864 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
865 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
866 AC_TRY_COMPILE([#include <math.h>],
867 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
868 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
869 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
870 AC_TRY_COMPILE([#include <math.h>],
871 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
872 AC_TRY_COMPILE([#include <math.h>],
873 [isunordered(0.0,0.0);],, [ac_c99_math=no])
874 AC_MSG_RESULT($ac_c99_math)
876 if test x"$ac_c99_math" = x"yes"; then
877 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
880 # Check for the existence in <stdio.h> of vscanf, et. al.
882 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
883 AC_TRY_COMPILE([#include <stdio.h>],
884 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
885 AC_TRY_COMPILE([#include <stdio.h>
887 void foo(char* fmt, ...)
888 {va_list args; va_start(args, fmt);
889 vfscanf(stderr, "%i", args);}],
890 [],, [ac_c99_stdio=no])
891 AC_TRY_COMPILE([#include <stdio.h>
893 void foo(char* fmt, ...)
894 {va_list args; va_start(args, fmt);
895 vscanf("%i", args);}],
896 [],, [ac_c99_stdio=no])
897 AC_TRY_COMPILE([#include <stdio.h>
899 void foo(char* fmt, ...)
900 {va_list args; va_start(args, fmt);
901 vsnprintf(fmt, 0, "%i", args);}],
902 [],, [ac_c99_stdio=no])
903 AC_TRY_COMPILE([#include <stdio.h>
905 void foo(char* fmt, ...)
906 {va_list args; va_start(args, fmt);
907 vsscanf(fmt, "%i", args);}],
908 [],, [ac_c99_stdio=no])
909 AC_MSG_RESULT($ac_c99_stdio)
911 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
913 AC_MSG_CHECKING([for lldiv_t declaration])
914 AC_CACHE_VAL(ac_c99_lldiv_t, [
915 AC_TRY_COMPILE([#include <stdlib.h>],
917 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
919 AC_MSG_RESULT($ac_c99_lldiv_t)
921 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
922 AC_TRY_COMPILE([#include <stdlib.h>],
923 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
924 AC_TRY_COMPILE([#include <stdlib.h>],
925 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
926 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
927 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
928 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
929 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
930 if test x"$ac_c99_lldiv_t" = x"no"; then
933 AC_MSG_RESULT($ac_c99_stdlib)
935 # Check for the existence of <wchar.h> functions used if C99 is enabled.
936 # XXX the wchar.h checks should be rolled into the general C99 bits.
938 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
939 AC_TRY_COMPILE([#include <wchar.h>],
940 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
941 AC_TRY_COMPILE([#include <wchar.h>],
942 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
943 AC_TRY_COMPILE([#include <wchar.h>],
944 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
945 AC_MSG_RESULT($ac_c99_wchar)
947 AC_MSG_CHECKING([for enabled ISO C99 support])
948 if test x"$ac_c99_math" = x"no" ||
949 test x"$ac_c99_stdio" = x"no" ||
950 test x"$ac_c99_stdlib" = x"no" ||
951 test x"$ac_c99_wchar" = x"no"; then
954 AC_MSG_RESULT($enable_c99)
956 if test x"$ac_99_math" = x"yes"; then
957 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
960 # Option parsed, now set things appropriately
961 if test x"$enable_c99" = x"yes"; then
962 AC_DEFINE(_GLIBCXX_USE_C99)
970 dnl Check for what type of C headers to use.
972 dnl --enable-cheaders= [does stuff].
973 dnl --disable-cheaders [does not do anything, really].
974 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
975 dnl Where DEFAULT is either `c' or `c_std'.
977 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
978 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
979 [construct "C" headers for g++], [permit c|c_std])
980 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
982 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
984 AC_SUBST(C_INCLUDE_DIR)
985 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
986 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
987 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
992 dnl Check for which locale library to use. The choice is mapped to
993 dnl a subdirectory of config/locale.
995 dnl Default is generic.
997 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
998 AC_MSG_CHECKING([for C locale to use])
999 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1000 [use MODEL for target locale package],
1001 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1003 # If they didn't use this option switch, or if they specified --enable
1004 # with no specific model, we'll have to look for one. If they
1005 # specified --disable (???), do likewise.
1006 if test $enable_clocale = no || test $enable_clocale = yes; then
1010 # Either a known package, or "auto"
1011 enable_clocale_flag=$enable_clocale
1013 # Probe for locale support if no specific model is specified.
1014 # Default to "generic".
1015 if test $enable_clocale_flag = auto; then
1016 case x${target_os} in
1017 xlinux* | xgnu* | xkfreebsd*-gnu | xknetbsd*-gnu)
1018 AC_EGREP_CPP([_GLIBCXX_ok], [
1019 #include <features.h>
1020 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1023 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1025 # Test for bugs early in glibc-2.2.x series
1026 if test x$enable_clocale_flag = xgnu; then
1028 #define _GNU_SOURCE 1
1031 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1032 extern __typeof(newlocale) __newlocale;
1033 extern __typeof(duplocale) __duplocale;
1034 extern __typeof(strcoll_l) __strcoll_l;
1038 const char __one[] = "Äuglein Augmen";
1039 const char __two[] = "Äuglein";
1044 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1045 loc_dup = __duplocale(loc);
1046 i = __strcoll_l(__one, __two, loc);
1047 j = __strcoll_l(__one, __two, loc_dup);
1051 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1052 [enable_clocale_flag=generic])
1055 # ... at some point put __strxfrm_l tests in as well.
1058 enable_clocale_flag=generic
1063 # Deal with gettext issues. Default to not using it (=no) until we detect
1064 # support for it later. Let the user turn it off via --e/d, but let that
1065 # default to on for easier handling.
1068 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1072 # Set configure bits for specified locale package
1073 case ${enable_clocale_flag} in
1075 AC_MSG_RESULT(generic)
1077 CLOCALE_H=config/locale/generic/c_locale.h
1078 CLOCALE_CC=config/locale/generic/c_locale.cc
1079 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1080 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1081 CCOLLATE_CC=config/locale/generic/collate_members.cc
1082 CCTYPE_CC=config/locale/generic/ctype_members.cc
1083 CMESSAGES_H=config/locale/generic/messages_members.h
1084 CMESSAGES_CC=config/locale/generic/messages_members.cc
1085 CMONEY_CC=config/locale/generic/monetary_members.cc
1086 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1087 CTIME_H=config/locale/generic/time_members.h
1088 CTIME_CC=config/locale/generic/time_members.cc
1089 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1094 # Declare intention to use gettext, and add support for specific
1096 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1099 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1100 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1101 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1104 # Export the build objects.
1105 for ling in $ALL_LINGUAS; do \
1106 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1107 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1109 AC_SUBST(glibcxx_MOFILES)
1110 AC_SUBST(glibcxx_POFILES)
1112 CLOCALE_H=config/locale/gnu/c_locale.h
1113 CLOCALE_CC=config/locale/gnu/c_locale.cc
1114 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1115 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1116 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1117 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1118 CMESSAGES_H=config/locale/gnu/messages_members.h
1119 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1120 CMONEY_CC=config/locale/gnu/monetary_members.cc
1121 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1122 CTIME_H=config/locale/gnu/time_members.h
1123 CTIME_CC=config/locale/gnu/time_members.cc
1124 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1127 AC_MSG_RESULT(IEEE 1003.1)
1129 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1130 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1131 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1132 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1133 CCOLLATE_CC=config/locale/generic/collate_members.cc
1134 CCTYPE_CC=config/locale/generic/ctype_members.cc
1135 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1136 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1137 CMONEY_CC=config/locale/generic/monetary_members.cc
1138 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1139 CTIME_H=config/locale/generic/time_members.h
1140 CTIME_CC=config/locale/generic/time_members.cc
1141 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1145 # This is where the testsuite looks for locale catalogs, using the
1146 # -DLOCALEDIR define during testsuite compilation.
1147 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1148 AC_SUBST(glibcxx_localedir)
1150 # A standalone libintl (e.g., GNU libintl) may be in use.
1151 if test $USE_NLS = yes; then
1152 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1153 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1155 if test $USE_NLS = yes; then
1156 AC_DEFINE(_GLIBCXX_USE_NLS)
1161 AC_SUBST(CCODECVT_H)
1162 AC_SUBST(CMESSAGES_H)
1163 AC_SUBST(CCODECVT_CC)
1164 AC_SUBST(CCOLLATE_CC)
1166 AC_SUBST(CMESSAGES_CC)
1168 AC_SUBST(CNUMERIC_CC)
1171 AC_SUBST(CLOCALE_CC)
1172 AC_SUBST(CLOCALE_INTERNAL_H)
1177 dnl Check for which std::allocator base class to use. The choice is
1178 dnl mapped from a subdirectory of include/ext.
1182 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1183 AC_MSG_CHECKING([for std::allocator base class to use])
1184 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1185 [use KIND for target std::allocator base],
1186 [permit new|malloc|mt|bitmap|yes|no|auto])
1187 # If they didn't use this option switch, or if they specified --enable
1188 # with no specific model, we'll have to look for one. If they
1189 # specified --disable (???), do likewise.
1190 if test $enable_libstdcxx_allocator = no || test $enable_libstdcxx_allocator = yes; then
1191 enable_libstdcxx_allocator=auto
1194 # Either a known package, or "auto"
1195 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1197 # Probe for host-specific support if no specific model is specified.
1199 if test $enable_libstdcxx_allocator_flag = auto; then
1200 case ${target_os} in
1202 enable_libstdcxx_allocator_flag=new
1206 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1209 # Set configure bits for specified locale package
1210 case ${enable_libstdcxx_allocator_flag} in
1212 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1213 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1216 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1217 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1220 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1221 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1224 ALLOCATOR_H=config/allocator/new_allocator_base.h
1225 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1229 AC_SUBST(ALLOCATOR_H)
1230 AC_SUBST(ALLOCATOR_NAME)
1235 dnl Check for whether the Boost-derived checks should be turned on.
1237 dnl --enable-concept-checks turns them on.
1238 dnl --disable-concept-checks leaves them off.
1239 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1240 dnl Where DEFAULT is either `yes' or `no'.
1242 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1243 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1244 if test $enable_concept_checks = yes; then
1245 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1251 dnl Check for which I/O library to use: stdio, or something specific.
1253 dnl Default is stdio.
1255 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1256 AC_MSG_CHECKING([for underlying I/O to use])
1257 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1258 [use target-specific I/O package], [permit stdio])
1260 # Now that libio has been removed, you can have any color you want as long
1261 # as it's black. This is one big no-op until other packages are added, but
1262 # showing the framework never hurts.
1263 case ${enable_cstdio} in
1265 CSTDIO_H=config/io/c_io_stdio.h
1266 BASIC_FILE_H=config/io/basic_file_stdio.h
1267 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1268 AC_MSG_RESULT(stdio)
1273 AC_SUBST(BASIC_FILE_H)
1274 AC_SUBST(BASIC_FILE_CC)
1279 dnl Check for "unusual" flags to pass to the compiler while building.
1281 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1282 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1283 dnl --disable-cxx-flags passes nothing.
1284 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1285 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1286 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1287 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1288 dnl If "default flags" is an empty string, the effect is the same
1289 dnl as --disable or --enable=no.
1291 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1292 AC_MSG_CHECKING([for extra compiler flags for building])
1293 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1294 [pass compiler FLAGS when building library],
1295 [case "x$enable_cxx_flags" in
1296 xno | x) enable_cxx_flags= ;;
1298 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1301 # Run through flags (either default or command-line) and set anything
1302 # extra (e.g., #defines) that must accompany particular g++ options.
1303 if test -n "$enable_cxx_flags"; then
1304 for f in $enable_cxx_flags; do
1308 *) # and we're trying to pass /what/ exactly?
1309 AC_MSG_ERROR([compiler flags start with a -]) ;;
1314 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1315 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1316 AC_SUBST(EXTRA_CXX_FLAGS)
1321 dnl Check for wide character support. Has the same effect as the option
1322 dnl in gcc's configure, but in a form that autoconf can mess with.
1324 dnl --enable-c-mbchar requests all the wchar_t stuff.
1325 dnl --disable-c-mbchar doesn't.
1326 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1327 dnl Where DEFAULT is either `yes' or `no'.
1329 AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [
1330 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1331 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1336 dnl Check to see if debugging libraries are to be built.
1338 dnl --enable-libstdcxx-debug
1339 dnl builds a separate set of debugging libraries in addition to the
1340 dnl normal (shared, static) libstdc++ binaries.
1342 dnl --disable-libstdcxx-debug
1343 dnl builds only one (non-debug) version of libstdc++.
1345 dnl --enable-libstdcxx-debug-flags=FLAGS
1346 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1348 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1349 dnl Where DEFAULT is either `yes' or `no'.
1351 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1352 AC_MSG_CHECKING([for additional debug build])
1353 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1354 AC_MSG_RESULT($enable_libstdcxx_debug)
1355 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1360 dnl Check for explicit debug flags.
1362 dnl --enable-libstdcxx-debug-flags='-O1'
1363 dnl is a general method for passing flags to be used when
1364 dnl building debug libraries with --enable-debug.
1366 dnl --disable-libstdcxx-debug-flags does nothing.
1367 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1368 dnl If "default flags" is an empty string, the effect is the same
1369 dnl as --disable or --enable=no.
1371 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1372 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1373 [pass compiler FLAGS when building debug library],
1374 [case "x$enable_libstdcxx_debug_flags" in
1375 xno | x) enable_libstdcxx_debug_flags= ;;
1377 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1380 # Option parsed, now set things appropriately
1381 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1382 AC_SUBST(DEBUG_FLAGS)
1384 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1389 dnl Check if the user only wants a freestanding library implementation.
1391 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1392 dnl installing only the headers required by [17.4.1.3] and the language
1393 dnl support library. More than that will be built (to keep the Makefiles
1394 dnl conveniently clean), but not installed.
1397 dnl is_hosted (yes/no)
1400 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1402 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1403 AC_ARG_ENABLE([hosted-libstdcxx],
1404 AC_HELP_STRING([--disable-hosted-libstdcxx],
1405 [only build freestanding C++ runtime support]),,
1406 [enable_hosted_libstdcxx=yes])
1407 if test "$enable_hosted_libstdcxx" = no; then
1408 AC_MSG_NOTICE([Only freestanding libraries will be built])
1412 enable_libstdcxx_pch=no
1417 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1418 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1419 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1424 dnl Check for template specializations for the 'long long' type extension.
1425 dnl The result determines only whether 'long long' I/O is enabled; things
1426 dnl like numeric_limits<> specializations are always available.
1428 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1429 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1430 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1431 dnl Where DEFAULT is either `yes' or `no'.
1432 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1434 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1435 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1440 AC_MSG_CHECKING([for enabled long long I/O support])
1441 # iostreams require strtoll, strtoull to compile
1442 AC_TRY_COMPILE([#include <stdlib.h>],
1443 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1444 AC_TRY_COMPILE([#include <stdlib.h>],
1445 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1447 # Option parsed, now set things appropriately
1448 if test $enable_long_long = yes; then
1449 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1451 AC_MSG_RESULT($enable_long_long)
1458 dnl Check to see if building and using a C++ precompiled header can be done.
1460 dnl --enable-libstdcxx-pch=yes
1461 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1462 dnl may work, after some light-hearted attempts to puzzle out compiler
1463 dnl support, flip bits on in include/Makefile.am
1465 dnl --disable-libstdcxx-pch
1466 dnl turns off attempts to use or build stdc++.h.gch.
1469 dnl glibcxx_PCHFLAGS
1471 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1472 AC_MSG_CHECKING([for enabled PCH])
1473 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1474 AC_MSG_RESULT([$enable_libstdcxx_pch])
1476 if test $enable_libstdcxx_pch = yes; then
1477 AC_CACHE_CHECK([for compiler with PCH support],
1478 [glibcxx_cv_prog_CXX_pch],
1479 [ac_save_CXXFLAGS="$CXXFLAGS"
1480 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1483 echo '#include <math.h>' > conftest.h
1484 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1485 -o conftest.h.gch 1>&5 2>&1 &&
1486 echo '#error "pch failed"' > conftest.h &&
1487 echo '#include "conftest.h"' > conftest.cc &&
1488 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1490 glibcxx_cv_prog_CXX_pch=yes
1492 glibcxx_cv_prog_CXX_pch=no
1495 CXXFLAGS=$ac_save_CXXFLAGS
1498 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1501 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1502 if test $enable_libstdcxx_pch = yes; then
1503 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1507 AC_SUBST(glibcxx_PCHFLAGS)
1512 dnl Check for exception handling support. If an explicit enable/disable
1513 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1514 dnl target may or may not support call frame exceptions.
1516 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1517 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1518 dnl Neither one forces an attempt at detection.
1521 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1523 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1524 AC_MSG_CHECKING([for exception model to use])
1527 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1528 [force use of builtin_setjmp for exceptions],
1529 [permit yes|no|auto])
1531 if test $enable_sjlj_exceptions = auto; then
1532 # Botheration. Now we've got to detect the exception model. Link tests
1533 # against libgcc.a are problematic since we've not been given proper -L
1534 # bits for single-tree newlib and libgloss.
1536 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1537 cat > conftest.$ac_ext << EOF
1538 [#]line __oline__ "configure"
1547 old_CXXFLAGS="$CXXFLAGS"
1549 if AC_TRY_EVAL(ac_compile); then
1550 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1551 enable_sjlj_exceptions=yes
1552 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1553 enable_sjlj_exceptions=no
1556 CXXFLAGS="$old_CXXFLAGS"
1560 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1561 # to two different models.
1562 case $enable_sjlj_exceptions in
1564 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1565 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1566 ac_exception_model_name=sjlj
1569 ac_exception_model_name="call frame"
1572 AC_MSG_ERROR([unable to detect exception model])
1576 AC_MSG_RESULT($ac_exception_model_name)
1581 dnl Add version tags to symbols in shared library (or not), additionally
1582 dnl marking other symbols as private/local (or not).
1584 dnl --enable-symvers=style adds a version script to the linker call when
1585 dnl creating the shared library. The choice of version script is
1586 dnl controlled by 'style'.
1587 dnl --disable-symvers does not.
1588 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1589 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1590 dnl choose a default style based on linker characteristics. Passing
1591 dnl 'no' disables versioning.
1593 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1595 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1596 [enables symbol versioning of the shared library],
1597 [permit yes|no|gnu])
1599 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1600 # don't know enough about $LD to do tricks...
1601 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1602 # FIXME The following test is too strict, in theory.
1603 if test $enable_shared = no ||
1605 test x$glibcxx_gnu_ld_version = x; then
1609 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1610 if test $enable_symvers != no; then
1611 AC_MSG_CHECKING([for shared libgcc])
1612 ac_save_CFLAGS="$CFLAGS"
1614 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1615 CFLAGS="$ac_save_CFLAGS"
1616 AC_MSG_RESULT($glibcxx_shared_libgcc)
1619 # For GNU ld, we need at least this version. The format is described in
1620 # GLIBCXX_CHECK_LINKER_FEATURES above.
1621 glibcxx_min_gnu_ld_version=21400
1622 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1624 # Check to see if unspecified "yes" value can win, given results above.
1625 # Change "yes" into either "no" or a style name.
1626 if test $enable_symvers = yes; then
1627 if test $with_gnu_ld = yes &&
1628 test $glibcxx_shared_libgcc = yes;
1630 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1633 # The right tools, the right setup, but too old. Fallbacks?
1634 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1635 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1636 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1637 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1638 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1639 # Globbing fix is present, proper block support is not.
1640 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1641 dnl enable_symvers=???
1642 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1646 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1652 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1653 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1654 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1655 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1660 # Everything parsed; figure out what file to use.
1661 case $enable_symvers in
1663 SYMVER_MAP=config/linker-map.dummy
1666 SYMVER_MAP=config/linker-map.gnu
1667 AC_DEFINE(_GLIBCXX_SYMVER)
1671 AC_SUBST(SYMVER_MAP)
1672 AC_SUBST(port_specific_symbol_files)
1673 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1674 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1679 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1680 dnl We must stage the required headers so that they will be installed
1681 dnl with the library (unlike libgcc, the STL implementation is provided
1682 dnl solely within headers). Since we must not inject random user-space
1683 dnl macro names into user-provided C++ code, we first stage into <file>-in
1684 dnl and process to <file> with an output command. The reason for a two-
1685 dnl stage process here is to correctly handle $srcdir!=$objdir without
1686 dnl having to write complex code (the sed commands to clean the macro
1687 dnl namespace are complex and fragile enough as it is). We must also
1688 dnl add a relative path so that -I- is supported properly.
1691 dnl glibcxx_thread_h
1694 dnl HAVE_GTHR_DEFAULT
1696 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1697 AC_MSG_CHECKING([for thread model used by GCC])
1698 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1699 AC_MSG_RESULT([$target_thread_file])
1701 if test $target_thread_file != single; then
1702 AC_DEFINE(HAVE_GTHR_DEFAULT)
1705 glibcxx_thread_h=gthr-$target_thread_file.h
1706 AC_SUBST(glibcxx_thread_h)
1710 # Check whether LC_MESSAGES is available in <locale.h>.
1711 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1713 # This file file be copied and used freely without restrictions. It can
1714 # be used in projects which are not available under the GNU Public License
1715 # but which still want to provide support for the GNU gettext functionality.
1716 # Please note that the actual code is *not* freely available.
1719 AC_DEFUN([AC_LC_MESSAGES], [
1720 AC_CHECK_HEADER(locale.h, [
1721 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1722 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1723 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1724 if test $ac_cv_val_LC_MESSAGES = yes; then
1725 AC_DEFINE(HAVE_LC_MESSAGES)
1731 sinclude([../libtool.m4])
1732 dnl The lines below arrange for aclocal not to bring an installed
1733 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1734 dnl add a definition of LIBTOOL to Makefile.in.
1735 ifelse(,,,[AC_SUBST(LIBTOOL)
1736 AC_DEFUN([AM_PROG_LIBTOOL])
1737 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1738 AC_DEFUN([AC_PROG_LD])
1741 dnl vim:et:ts=2:sw=2