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])
184 dnl Tests for newer compiler features, or features that are present in newer
185 dnl compiler versions but not older compiler versions still in use, should
189 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
190 dnl new inlining code or the new system_header pragma will die on -Werror.
191 dnl Leave it out by default and use maint-mode to use it.
192 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
193 dnl compiler supports it and the user has not requested debug mode.
195 AC_DEFUN(GLIBCXX_CHECK_COMPILER_FEATURES, [
196 # All these tests are for C++; save the language and the compiler flags.
197 # The CXXFLAGS thing is suspicious, but based on similar bits previously
198 # found in GLIBCXX_CONFIGURE.
201 ac_test_CXXFLAGS="${CXXFLAGS+set}"
202 ac_save_CXXFLAGS="$CXXFLAGS"
204 # Check for maintainer-mode bits.
205 if test x"$USE_MAINTAINER_MODE" = xno; then
211 # Check for -ffunction-sections -fdata-sections
212 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
213 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
214 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
215 if test "$ac_test_CXXFLAGS" = set; then
216 CXXFLAGS="$ac_save_CXXFLAGS"
218 # this is the suspicious part
221 if test x"$ac_fdsections" = x"yes"; then
222 SECTION_FLAGS='-ffunction-sections -fdata-sections'
224 AC_MSG_RESULT($ac_fdsections)
228 AC_SUBST(SECTION_FLAGS)
233 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
234 dnl the native linker is in use, all variables will be defined to something
235 dnl safe (like an empty string).
238 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
239 dnl OPT_LDFLAGS='-Wl,-O1' if possible
240 dnl LD (as a side effect of testing)
243 dnl glibcxx_gnu_ld_version (possibly)
245 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
246 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
248 AC_DEFUN(GLIBCXX_CHECK_LINKER_FEATURES, [
249 # If we're not using GNU ld, then there's no point in even trying these
250 # tests. Check for that first. We should have already tested for gld
251 # by now (in libtool), but require it now just to be safe...
252 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
253 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
254 AC_REQUIRE([AC_PROG_LD])
255 AC_REQUIRE([AC_PROG_AWK])
257 # The name set by libtool depends on the version of libtool. Shame on us
258 # for depending on an impl detail, but c'est la vie. Older versions used
259 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
260 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
261 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
262 # set (hence we're using an older libtool), then set it.
263 if test x${with_gnu_ld+set} != xset; then
264 if test x${ac_cv_prog_gnu_ld+set} != xset; then
265 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
268 with_gnu_ld=$ac_cv_prog_gnu_ld
272 # Start by getting the version number. I think the libtool test already
273 # does some of this, but throws away the result.
275 ldver=`$LD --version 2>/dev/null | head -1 | \
276 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
278 glibcxx_gnu_ld_version=`echo $ldver | \
279 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
282 if test "$with_gnu_ld" = "notbroken"; then
283 # GNU ld it is! Joy and bunny rabbits!
285 # All these tests are for C++; save the language and the compiler flags.
286 # Need to do this so that g++ won't try to link in libstdc++
287 ac_test_CFLAGS="${CFLAGS+set}"
288 ac_save_CFLAGS="$CFLAGS"
289 CFLAGS='-x c++ -Wl,--gc-sections'
291 # Check for -Wl,--gc-sections
292 # XXX This test is broken at the moment, as symbols required for linking
293 # are now in libsupc++ (not built yet). In addition, this test has
294 # cored on solaris in the past. In addition, --gc-sections doesn't
295 # really work at the moment (keeps on discarding used sections, first
296 # .eh_frame and now some of the glibc sections for iconv).
297 # Bzzzzt. Thanks for playing, maybe next time.
298 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
306 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
307 if test "$ac_test_CFLAGS" = set; then
308 CFLAGS="$ac_save_CFLAGS"
310 # this is the suspicious part
313 if test "$ac_sectionLDflags" = "yes"; then
314 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
316 AC_MSG_RESULT($ac_sectionLDflags)
319 # Set linker optimization flags.
320 if test x"$with_gnu_ld" = x"yes"; then
321 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
324 AC_SUBST(SECTION_LDFLAGS)
325 AC_SUBST(OPT_LDFLAGS)
330 dnl Check to see if this target can enable the wchar_t parts.
331 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
332 dnl must have been previously checked.) By default, wide characters are
336 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
337 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
339 AC_DEFUN(GLIBCXX_CHECK_WCHAR_T_SUPPORT, [
340 # Test wchar.h for mbstate_t, which is needed for char_traits and
341 # others even if wchar_t support is not on.
342 AC_MSG_CHECKING([for mbstate_t])
343 AC_TRY_COMPILE([#include <wchar.h>],
344 [mbstate_t teststate;],
345 have_mbstate_t=yes, have_mbstate_t=no)
346 AC_MSG_RESULT($have_mbstate_t)
347 if test x"$have_mbstate_t" = xyes; then
348 AC_DEFINE(HAVE_MBSTATE_T)
351 # Sanity check for existence of ISO C99 headers for extended encoding.
352 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
353 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
355 # Only continue checking if the ISO C99 headers exist and support is on.
356 if test x"$ac_has_wchar_h" = xyes &&
357 test x"$ac_has_wctype_h" = xyes &&
358 test x"$enable_c_mbchar" != xno; then
360 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
361 # numeric_limits can instantiate type_traits<wchar_t>
362 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
363 AC_TRY_COMPILE([#include <wchar.h>],
364 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
365 has_wchar_minmax=yes, has_wchar_minmax=no)
366 AC_MSG_RESULT($has_wchar_minmax)
368 # Test wchar.h for WEOF, which is what we use to determine whether
369 # to specialize for char_traits<wchar_t> or not.
370 AC_MSG_CHECKING([for WEOF])
373 #include <stddef.h>],
375 has_weof=yes, has_weof=no)
376 AC_MSG_RESULT($has_weof)
378 # Tests for wide character functions used in char_traits<wchar_t>.
380 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
383 # Checks for names injected into std:: by the c_std headers.
384 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
385 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
386 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
387 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
388 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
389 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
392 AC_MSG_CHECKING([for ISO C99 wchar_t support])
393 if test x"$has_weof" = xyes &&
394 test x"$has_wchar_minmax" = xyes &&
395 test x"$ac_wfuncs" = xyes;
397 ac_isoC99_wchar_t=yes
401 AC_MSG_RESULT($ac_isoC99_wchar_t)
403 # Use iconv for wchar_t to char conversions. As such, check for
404 # X/Open Portability Guide, version 2 features (XPG2).
405 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
406 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
408 # Check for existence of libiconv.a providing XPG2 wchar_t support.
409 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
411 LIBS="$LIBS $libiconv"
413 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
414 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
418 AC_MSG_CHECKING([for XPG2 wchar_t support])
419 if test x"$ac_has_iconv_h" = xyes &&
420 test x"$ac_has_langinfo_h" = xyes &&
421 test x"$ac_XPG2funcs" = xyes;
427 AC_MSG_RESULT($ac_XPG2_wchar_t)
429 # At the moment, only enable wchar_t specializations if all the
430 # above support is present.
431 if test x"$ac_isoC99_wchar_t" = xyes &&
432 test x"$ac_XPG2_wchar_t" = xyes;
434 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
438 AC_MSG_CHECKING([for enabled wchar_t specializations])
439 AC_MSG_RESULT($enable_wchar_t)
444 dnl Check for headers for, and arguments to, the setrlimit() function.
445 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
448 dnl _GLIBCXX_MEM_LIMITS if we can set artificial limits on memory
449 dnl various HAVE_MEMLIMIT_* for individual limit names
451 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT_ancilliary, [
454 #include <sys/time.h>
455 #include <sys/resource.h>
457 [ int f = RLIMIT_$1 ; ],
458 [glibcxx_mresult=1], [glibcxx_mresult=0])
459 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcxx_mresult,
460 [Only used in build directory testsuite_hooks.h.])
463 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT, [
464 setrlimit_have_headers=yes
465 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
467 [setrlimit_have_headers=no])
468 # If don't have the headers, then we can't run the tests now, and we
469 # won't be seeing any of these during testsuite compilation.
470 if test $setrlimit_have_headers = yes; then
471 # Can't do these in a loop, else the resulting syntax is wrong.
472 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
473 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
474 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
475 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
477 # Check for rlimit, setrlimit.
478 AC_CACHE_VAL(ac_setrlimit, [
481 #include <sys/time.h>
482 #include <sys/resource.h>
486 [ac_setrlimit=yes], [ac_setrlimit=no])
490 AC_MSG_CHECKING([for testsuite memory limit support])
491 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
493 AC_DEFINE(_GLIBCXX_MEM_LIMITS)
497 AC_MSG_RESULT($ac_mem_limits)
502 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
503 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
505 AC_DEFUN(GLIBCXX_CHECK_S_ISREG_OR_S_IFREG, [
506 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
508 [#include <sys/stat.h>],
511 S_ISREG(buffer.st_mode);],
512 [glibcxx_cv_S_ISREG=yes],
513 [glibcxx_cv_S_ISREG=no])
515 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
517 [#include <sys/stat.h>],
520 S_IFREG & buffer.st_mode;],
521 [glibcxx_cv_S_IFREG=yes],
522 [glibcxx_cv_S_IFREG=no])
524 if test $glibcxx_cv_S_ISREG = yes; then
525 AC_DEFINE(HAVE_S_ISREG)
526 elif test $glibcxx_cv_S_IFREG = yes; then
527 AC_DEFINE(HAVE_S_IFREG)
533 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
535 AC_DEFUN(GLIBCXX_CHECK_POLL, [
536 AC_CACHE_VAL(glibcxx_cv_POLL, [
539 [struct pollfd pfd[1];
540 pfd[0].events = POLLIN;
542 [glibcxx_cv_POLL=yes],
543 [glibcxx_cv_POLL=no])
545 if test $glibcxx_cv_POLL = yes; then
552 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
554 AC_DEFUN(GLIBCXX_CHECK_WRITEV, [
555 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
557 [#include <sys/uio.h>],
558 [struct iovec iov[2];
560 [glibcxx_cv_WRITEV=yes],
561 [glibcxx_cv_WRITEV=no])
563 if test $glibcxx_cv_WRITEV = yes; then
564 AC_DEFINE(HAVE_WRITEV)
570 dnl Does any necessary configuration of the testsuite directory. Generates
571 dnl the testsuite_hooks.h header.
573 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
576 dnl enable_abi_check / GLIBCXX_TEST_ABI
580 AC_DEFUN(GLIBCXX_CONFIGURE_TESTSUITE, [
581 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
582 # Do checks for memory limit functions.
583 GLIBCXX_CHECK_SETRLIMIT
585 # Look for setenv, so that extended locale tests can be performed.
586 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
589 # Export file names for ABI checking.
590 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
591 AC_SUBST(baseline_dir)
593 # Determine if checking the ABI is desirable.
594 if test $enable_symvers = no || test $is_hosted = no; then
599 enable_abi_check=no ;;
601 enable_abi_check=yes ;;
605 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
606 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
611 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
615 dnl TOPLEVEL_INCLUDES
617 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
618 # Used for every C++ compile we perform.
620 -I$glibcxx_builddir/include/$host_alias \
621 -I$glibcxx_builddir/include \
622 -I$glibcxx_srcdir/libsupc++"
624 # For Canadian crosses, pick this up too.
625 if test $CANADIAN = yes; then
626 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES '-I${includedir}'"
629 # Stuff in the actual top level. Currently only used by libsupc++ to
630 # get unwind* headers from the gcc dir.
631 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
632 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
634 # Now, export this to all the little Makefiles....
635 AC_SUBST(GLIBCXX_INCLUDES)
636 AC_SUBST(TOPLEVEL_INCLUDES)
641 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
642 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
645 dnl OPTIMIZE_CXXFLAGS
648 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
649 # Optimization flags that are probably a good idea for thrill-seekers. Just
650 # uncomment the lines below and make, everything else is ready to go...
651 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
653 AC_SUBST(OPTIMIZE_CXXFLAGS)
655 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings'
661 dnl All installation directory information is determined here.
665 dnl glibcxx_prefixdir
666 dnl glibcxx_toolexecdir
667 dnl glibcxx_toolexeclibdir
669 dnl Assumes cross_compiling bits already done, and with_cross_host in
672 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
673 glibcxx_toolexecdir=no
674 glibcxx_toolexeclibdir=no
675 glibcxx_prefixdir=$prefix
677 AC_MSG_CHECKING([for gxx-include-dir])
678 AC_ARG_WITH([gxx-include-dir],
679 AC_HELP_STRING([--with-gxx-include-dir=DIR],
680 [installation directory for include files]),
682 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
683 no) gxx_include_dir=no ;;
684 *) gxx_include_dir=$withval ;;
686 [gxx_include_dir=no])
687 AC_MSG_RESULT($gxx_include_dir)
689 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
690 AC_ARG_ENABLE([version-specific-runtime-libs],
691 AC_HELP_STRING([--enable-version-specific-runtime-libs],
692 [Specify that runtime libraries should be installed in a compiler-specific directory]),
693 [case "$enableval" in
694 yes) version_specific_libs=yes ;;
695 no) version_specific_libs=no ;;
696 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
698 [version_specific_libs=no])
699 AC_MSG_RESULT($version_specific_libs)
701 # Default case for install directory for include files.
702 if test $version_specific_libs = no && test $gxx_include_dir = no; then
703 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
706 # Version-specific runtime libs processing.
707 if test $version_specific_libs = yes; then
708 # Need the gcc compiler version to know where to install libraries
709 # and header files if --enable-version-specific-runtime-libs option
711 if test x"$gxx_include_dir" = x"no"; then
712 gxx_include_dir='${libdir}/gcc-lib/${host_alias}/'$gcc_version/include/c++
714 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
715 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
718 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
719 # Install a library built with a cross compiler in tooldir, not libdir.
720 if test x"$glibcxx_toolexecdir" = x"no"; then
721 if test -n "$with_cross_host" &&
722 test x"$with_cross_host" != x"no"; then
723 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
724 glibcxx_toolexeclibdir='${toolexecdir}/lib'
726 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
727 glibcxx_toolexeclibdir='${libdir}'
729 multi_os_directory=`$CXX -print-multi-os-directory`
730 case $multi_os_directory in
731 .) ;; # Avoid trailing /.
732 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
736 AC_MSG_CHECKING([for install location])
737 AC_MSG_RESULT($gxx_include_dir)
739 AC_SUBST(glibcxx_prefixdir)
740 AC_SUBST(gxx_include_dir)
741 AC_SUBST(glibcxx_toolexecdir)
742 AC_SUBST(glibcxx_toolexeclibdir)
748 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
749 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
750 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
752 dnl See docs/html/17_intro/configury.html#enable for documentation.
754 m4_define([GLIBCXX_ENABLE],[dnl
755 m4_define([_g_switch],[--enable-$1])dnl
756 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
757 AC_ARG_ENABLE($1,_g_help,
762 m4_bpatsubst([$5],[permit ])) ;;
763 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
764 dnl Idea for future: generate a URL pointing to
765 dnl "onlinedocs/configopts.html#whatever"
772 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
776 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
777 m4_undefine([_g_switch])dnl
778 m4_undefine([_g_help])dnl
783 dnl Check for ISO/IEC 9899:1999 "C99" support.
785 dnl --enable-c99 defines _GLIBCXX_USE_C99
786 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
787 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
788 dnl Where DEFAULT is either `yes' or `no'.
789 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
791 AC_DEFUN(GLIBCXX_ENABLE_C99, [
792 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
797 # Check for the existence of <math.h> functions used if C99 is enabled.
799 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
800 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
801 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
802 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
803 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
804 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
805 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
806 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
807 AC_TRY_COMPILE([#include <math.h>],
808 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
809 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
810 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
811 AC_TRY_COMPILE([#include <math.h>],
812 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
813 AC_TRY_COMPILE([#include <math.h>],
814 [isunordered(0.0,0.0);],, [ac_c99_math=no])
815 AC_MSG_RESULT($ac_c99_math)
817 # Check for the existence in <stdio.h> of vscanf, et. al.
819 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
820 AC_TRY_COMPILE([#include <stdio.h>],
821 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
822 AC_TRY_COMPILE([#include <stdio.h>
824 void foo(char* fmt, ...)
825 {va_list args; va_start(args, fmt);
826 vfscanf(stderr, "%i", args);}],
827 [],, [ac_c99_stdio=no])
828 AC_TRY_COMPILE([#include <stdio.h>
830 void foo(char* fmt, ...)
831 {va_list args; va_start(args, fmt);
832 vscanf("%i", args);}],
833 [],, [ac_c99_stdio=no])
834 AC_TRY_COMPILE([#include <stdio.h>
836 void foo(char* fmt, ...)
837 {va_list args; va_start(args, fmt);
838 vsnprintf(fmt, 0, "%i", args);}],
839 [],, [ac_c99_stdio=no])
840 AC_TRY_COMPILE([#include <stdio.h>
842 void foo(char* fmt, ...)
843 {va_list args; va_start(args, fmt);
844 vsscanf(fmt, "%i", args);}],
845 [],, [ac_c99_stdio=no])
846 AC_MSG_RESULT($ac_c99_stdio)
848 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
850 AC_MSG_CHECKING([for lldiv_t declaration])
851 AC_CACHE_VAL(ac_c99_lldiv_t, [
852 AC_TRY_COMPILE([#include <stdlib.h>],
854 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
856 AC_MSG_RESULT($ac_c99_lldiv_t)
858 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
859 AC_TRY_COMPILE([#include <stdlib.h>],
860 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
861 AC_TRY_COMPILE([#include <stdlib.h>],
862 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
863 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
864 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
865 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
866 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
867 if test x"$ac_c99_lldiv_t" = x"no"; then
870 AC_MSG_RESULT($ac_c99_stdlib)
872 # Check for the existence of <wchar.h> functions used if C99 is enabled.
873 # XXX the wchar.h checks should be rolled into the general C99 bits.
875 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
876 AC_TRY_COMPILE([#include <wchar.h>],
877 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
878 AC_TRY_COMPILE([#include <wchar.h>],
879 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
880 AC_TRY_COMPILE([#include <wchar.h>],
881 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
882 AC_MSG_RESULT($ac_c99_wchar)
884 AC_MSG_CHECKING([for enabled ISO C99 support])
885 if test x"$ac_c99_math" = x"no" ||
886 test x"$ac_c99_stdio" = x"no" ||
887 test x"$ac_c99_stdlib" = x"no" ||
888 test x"$ac_c99_wchar" = x"no"; then
891 AC_MSG_RESULT($enable_c99)
893 # Option parsed, now set things appropriately
894 if test x"$enable_c99" = x"yes"; then
895 AC_DEFINE(_GLIBCXX_USE_C99)
903 dnl Check for what type of C headers to use.
905 dnl --enable-cheaders= [does stuff].
906 dnl --disable-cheaders [does not do anything, really].
907 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
908 dnl Where DEFAULT is either `c' or `c_std'.
910 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
911 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
912 [construct "C" headers for g++], [permit c|c_std])
913 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
915 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
917 AC_SUBST(C_INCLUDE_DIR)
918 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
919 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
920 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
925 dnl Check for which locale library to use. The choice is mapped to
926 dnl a subdirectory of config/locale.
928 dnl Default is generic.
930 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
931 AC_MSG_CHECKING([for C locale to use])
932 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
933 [use MODEL for target locale package],
934 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
936 # If they didn't use this option switch, or if they specified --enable
937 # with no specific model, we'll have to look for one. If they
938 # specified --disable (???), do likewise.
939 if test $enable_clocale = no || test $enable_clocale = yes; then
943 # Either a known package, or "auto"
944 enable_clocale_flag=$enable_clocale
946 # Probe for locale support if no specific model is specified.
947 # Default to "generic".
948 if test $enable_clocale_flag = auto; then
949 case x${target_os} in
951 AC_EGREP_CPP([_GLIBCXX_ok], [
952 #include <features.h>
953 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
956 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
958 # Test for bugs early in glibc-2.2.x series
959 if test x$enable_clocale_flag = xgnu; then
961 #define _GNU_SOURCE 1
964 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
965 extern __typeof(newlocale) __newlocale;
966 extern __typeof(duplocale) __duplocale;
967 extern __typeof(strcoll_l) __strcoll_l;
971 const char __one[] = "Äuglein Augmen";
972 const char __two[] = "Äuglein";
977 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
978 loc_dup = __duplocale(loc);
979 i = __strcoll_l(__one, __two, loc);
980 j = __strcoll_l(__one, __two, loc_dup);
984 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
985 [enable_clocale_flag=generic])
988 # ... at some point put __strxfrm_l tests in as well.
991 enable_clocale_flag=generic
996 # Deal with gettext issues. Default to not using it (=no) until we detect
997 # support for it later. Let the user turn it off via --e/d, but let that
998 # default to on for easier handling.
1001 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1005 # Set configure bits for specified locale package
1006 case ${enable_clocale_flag} in
1008 AC_MSG_RESULT(generic)
1010 CLOCALE_H=config/locale/generic/c_locale.h
1011 CLOCALE_CC=config/locale/generic/c_locale.cc
1012 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1013 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1014 CCOLLATE_CC=config/locale/generic/collate_members.cc
1015 CCTYPE_CC=config/locale/generic/ctype_members.cc
1016 CMESSAGES_H=config/locale/generic/messages_members.h
1017 CMESSAGES_CC=config/locale/generic/messages_members.cc
1018 CMONEY_CC=config/locale/generic/monetary_members.cc
1019 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1020 CTIME_H=config/locale/generic/time_members.h
1021 CTIME_CC=config/locale/generic/time_members.cc
1022 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1027 # Declare intention to use gettext, and add support for specific
1029 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1032 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1033 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1034 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1037 # Export the build objects.
1038 for ling in $ALL_LINGUAS; do \
1039 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1040 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1042 AC_SUBST(glibcxx_MOFILES)
1043 AC_SUBST(glibcxx_POFILES)
1045 CLOCALE_H=config/locale/gnu/c_locale.h
1046 CLOCALE_CC=config/locale/gnu/c_locale.cc
1047 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1048 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1049 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1050 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1051 CMESSAGES_H=config/locale/gnu/messages_members.h
1052 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1053 CMONEY_CC=config/locale/gnu/monetary_members.cc
1054 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1055 CTIME_H=config/locale/gnu/time_members.h
1056 CTIME_CC=config/locale/gnu/time_members.cc
1057 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1060 AC_MSG_RESULT(IEEE 1003.1)
1062 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1063 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1064 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1065 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1066 CCOLLATE_CC=config/locale/generic/collate_members.cc
1067 CCTYPE_CC=config/locale/generic/ctype_members.cc
1068 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1069 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1070 CMONEY_CC=config/locale/generic/monetary_members.cc
1071 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1072 CTIME_H=config/locale/generic/time_members.h
1073 CTIME_CC=config/locale/generic/time_members.cc
1074 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1078 # This is where the testsuite looks for locale catalogs, using the
1079 # -DLOCALEDIR define during testsuite compilation.
1080 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1081 AC_SUBST(glibcxx_localedir)
1083 # A standalone libintl (e.g., GNU libintl) may be in use.
1084 if test $USE_NLS = yes; then
1085 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1086 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1088 if test $USE_NLS = yes; then
1089 AC_DEFINE(_GLIBCXX_USE_NLS)
1094 AC_SUBST(CCODECVT_H)
1095 AC_SUBST(CMESSAGES_H)
1096 AC_SUBST(CCODECVT_CC)
1097 AC_SUBST(CCOLLATE_CC)
1099 AC_SUBST(CMESSAGES_CC)
1101 AC_SUBST(CNUMERIC_CC)
1104 AC_SUBST(CLOCALE_CC)
1105 AC_SUBST(CLOCALE_INTERNAL_H)
1110 dnl Check for whether the Boost-derived checks should be turned on.
1112 dnl --enable-concept-checks turns them on.
1113 dnl --disable-concept-checks leaves them off.
1114 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1115 dnl Where DEFAULT is either `yes' or `no'.
1117 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1118 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1119 if test $enable_concept_checks = yes; then
1120 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1126 dnl Check for which I/O library to use: stdio, or something specific.
1128 dnl Default is stdio.
1130 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1131 AC_MSG_CHECKING([for underlying I/O to use])
1132 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1133 [use target-specific I/O package], [permit stdio])
1135 # Now that libio has been removed, you can have any color you want as long
1136 # as it's black. This is one big no-op until other packages are added, but
1137 # showing the framework never hurts.
1138 case ${enable_cstdio} in
1140 CSTDIO_H=config/io/c_io_stdio.h
1141 BASIC_FILE_H=config/io/basic_file_stdio.h
1142 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1143 AC_MSG_RESULT(stdio)
1147 dnl Set directory for fpos.h
1148 FPOS_H=$fpos_include_dir
1152 AC_SUBST(BASIC_FILE_H)
1153 AC_SUBST(BASIC_FILE_CC)
1158 dnl Check for "unusual" flags to pass to the compiler while building.
1160 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1161 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1162 dnl --disable-cxx-flags passes nothing.
1163 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1164 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1165 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1166 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1167 dnl If "default flags" is an empty string, the effect is the same
1168 dnl as --disable or --enable=no.
1170 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1171 AC_MSG_CHECKING([for extra compiler flags for building])
1172 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1173 [pass compiler FLAGS when building library],
1174 [case "x$enable_cxx_flags" in
1175 xno | x) enable_cxx_flags= ;;
1177 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1180 # Run through flags (either default or command-line) and set anything
1181 # extra (e.g., #defines) that must accompany particular g++ options.
1182 if test -n "$enable_cxx_flags"; then
1183 for f in $enable_cxx_flags; do
1187 *) # and we're trying to pass /what/ exactly?
1188 AC_MSG_ERROR([compiler flags start with a -]) ;;
1193 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1194 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1195 AC_SUBST(EXTRA_CXX_FLAGS)
1200 dnl Check for wide character support. Has the same effect as the option
1201 dnl in gcc's configure, but in a form that autoconf can mess with.
1203 dnl --enable-c-mbchar requests all the wchar_t stuff.
1204 dnl --disable-c-mbchar doesn't.
1205 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1206 dnl Where DEFAULT is either `yes' or `no'.
1208 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1209 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1210 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1215 dnl Check to see if debugging libraries are to be built.
1217 dnl --enable-libstdcxx-debug
1218 dnl builds a separate set of debugging libraries in addition to the
1219 dnl normal (shared, static) libstdc++ binaries.
1221 dnl --disable-libstdcxx-debug
1222 dnl builds only one (non-debug) version of libstdc++.
1224 dnl --enable-libstdcxx-debug-flags=FLAGS
1225 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1227 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1228 dnl Where DEFAULT is either `yes' or `no'.
1230 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1231 AC_MSG_CHECKING([for additional debug build])
1232 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1233 AC_MSG_RESULT($enable_libstdcxx_debug)
1234 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1239 dnl Check for explicit debug flags.
1241 dnl --enable-libstdcxx-debug-flags='-O1'
1242 dnl is a general method for passing flags to be used when
1243 dnl building debug libraries with --enable-debug.
1245 dnl --disable-libstdcxx-debug-flags does nothing.
1246 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1247 dnl If "default flags" is an empty string, the effect is the same
1248 dnl as --disable or --enable=no.
1250 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1251 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1252 [pass compiler FLAGS when building debug library],
1253 [case "x$enable_libstdcxx_debug_flags" in
1254 xno | x) enable_libstdcxx_debug_flags= ;;
1256 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1259 # Option parsed, now set things appropriately
1260 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1261 AC_SUBST(DEBUG_FLAGS)
1263 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1268 dnl Check if the user only wants a freestanding library implementation.
1270 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1271 dnl installing only the headers required by [17.4.1.3] and the language
1272 dnl support library. More than that will be built (to keep the Makefiles
1273 dnl conveniently clean), but not installed.
1276 dnl is_hosted (yes/no)
1278 AC_DEFUN(GLIBCXX_ENABLE_HOSTED, [
1279 AC_ARG_ENABLE([hosted-libstdcxx],
1280 AC_HELP_STRING([--disable-hosted-libstdcxx],
1281 [only build freestanding C++ runtime support]),,
1282 [enable_hosted_libstdcxx=yes])
1283 if test "$enable_hosted_libstdcxx" = no; then
1284 AC_MSG_NOTICE([Only freestanding libraries will be built])
1287 enable_libstdcxx_pch=no
1291 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1296 dnl Check for libunwind exception handling support. If enabled, then
1297 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1298 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1299 dnl libunwind instead of libgcc, and that libstdc++ has a dependency
1300 dnl on libunwind as well as libgcc.
1302 dnl --enable-libunwind-exceptions forces the use of libunwind.
1303 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1308 AC_DEFUN(GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS, [
1309 AC_MSG_CHECKING([for use of libunwind])
1310 GLIBCXX_ENABLE(libunwind-exceptions,no,,
1311 [force use of libunwind for exceptions])
1312 AC_MSG_RESULT($use_libunwind_exceptions)
1313 if test $enable_libunwind_exceptions = yes; then
1314 LIBUNWIND_FLAG="-lunwind"
1318 AC_SUBST(LIBUNWIND_FLAG)
1323 dnl Check for template specializations for the 'long long' type extension.
1324 dnl The result determines only whether 'long long' I/O is enabled; things
1325 dnl like numeric_limits<> specializations are always available.
1327 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1328 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1329 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1330 dnl Where DEFAULT is either `yes' or `no'.
1331 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1333 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1334 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1339 AC_MSG_CHECKING([for enabled long long I/O support])
1340 # iostreams require strtoll, strtoull to compile
1341 AC_TRY_COMPILE([#include <stdlib.h>],
1342 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1343 AC_TRY_COMPILE([#include <stdlib.h>],
1344 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1346 # Option parsed, now set things appropriately
1347 if test $enable_long_long = yes; then
1348 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1350 AC_MSG_RESULT($enable_long_long)
1357 dnl Check to see if building and using a C++ precompiled header can be done.
1359 dnl --enable-libstdcxx-pch=yes
1360 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1361 dnl may work, after some light-hearted attempts to puzzle out compiler
1362 dnl support, flip bits on in include/Makefile.am
1364 dnl --disable-libstdcxx-pch
1365 dnl turns off attempts to use or build stdc++.h.gch.
1368 dnl glibcxx_PCHFLAGS
1370 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1371 AC_MSG_CHECKING([for enabled PCH])
1372 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1373 AC_MSG_RESULT([$enable_libstdcxx_pch])
1375 if test $enable_libstdcxx_pch = yes; then
1376 AC_CACHE_CHECK([for compiler with PCH support],
1377 [glibcxx_cv_prog_CXX_pch],
1378 [ac_save_CXXFLAGS="$CXXFLAGS"
1379 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1382 echo '#include <math.h>' > conftest.h
1383 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1384 -o conftest.h.gch 1>&5 2>&1 &&
1385 echo '#error "pch failed"' > conftest.h &&
1386 echo '#include "conftest.h"' > conftest.cc &&
1387 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1389 glibcxx_cv_prog_CXX_pch=yes
1391 glibcxx_cv_prog_CXX_pch=no
1394 CXXFLAGS=$ac_save_CXXFLAGS
1397 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1400 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1401 if test $enable_libstdcxx_pch = yes; then
1402 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1406 AC_SUBST(glibcxx_PCHFLAGS)
1411 dnl Check for exception handling support. If an explicit enable/disable
1412 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1413 dnl target may or may not support call frame exceptions.
1415 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1416 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1417 dnl Neither one forces an attempt at detection.
1420 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1422 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1423 AC_MSG_CHECKING([for exception model to use])
1426 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1427 [force use of builtin_setjmp for exceptions],
1428 [permit yes|no|auto])
1430 if test $enable_sjlj_exceptions = auto; then
1431 # Botheration. Now we've got to detect the exception model. Link tests
1432 # against libgcc.a are problematic since we've not been given proper -L
1433 # bits for single-tree newlib and libgloss.
1435 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1436 cat > conftest.$ac_ext << EOF
1437 [#]line __oline__ "configure"
1446 old_CXXFLAGS="$CXXFLAGS"
1448 if AC_TRY_EVAL(ac_compile); then
1449 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1450 enable_sjlj_exceptions=yes
1451 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1452 enable_sjlj_exceptions=no
1455 CXXFLAGS="$old_CXXFLAGS"
1459 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1460 # to two different models.
1461 case $enable_sjlj_exceptions in
1463 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1464 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1465 ac_exception_model_name=sjlj
1468 ac_exception_model_name="call frame"
1471 AC_MSG_ERROR([unable to detect exception model])
1475 AC_MSG_RESULT($ac_exception_model_name)
1480 dnl Add version tags to symbols in shared library (or not), additionally
1481 dnl marking other symbols as private/local (or not).
1483 dnl --enable-symvers=style adds a version script to the linker call when
1484 dnl creating the shared library. The choice of version script is
1485 dnl controlled by 'style'.
1486 dnl --disable-symvers does not.
1487 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1488 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1489 dnl choose a default style based on linker characteristics. Passing
1490 dnl 'no' disables versioning.
1492 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1494 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1495 [enables symbol versioning of the shared library],
1496 [permit yes|no|gnu])
1498 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1499 # don't know enough about $LD to do tricks...
1500 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1501 # FIXME The following test is too strict, in theory.
1502 if test $enable_shared = no ||
1504 test x$glibcxx_gnu_ld_version = x; then
1508 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1509 if test $enable_symvers != no; then
1510 AC_MSG_CHECKING([for shared libgcc])
1511 ac_save_CFLAGS="$CFLAGS"
1513 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1514 CFLAGS="$ac_save_CFLAGS"
1515 AC_MSG_RESULT($glibcxx_shared_libgcc)
1518 # For GNU ld, we need at least this version. The format is described in
1519 # GLIBCXX_CHECK_LINKER_FEATURES above.
1520 glibcxx_min_gnu_ld_version=21400
1521 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1523 # Check to see if unspecified "yes" value can win, given results above.
1524 # Change "yes" into either "no" or a style name.
1525 if test $enable_symvers = yes; then
1526 if test $with_gnu_ld = yes &&
1527 test $glibcxx_shared_libgcc = yes;
1529 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1532 # The right tools, the right setup, but too old. Fallbacks?
1533 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1534 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1535 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1536 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1537 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1538 # Globbing fix is present, proper block support is not.
1539 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1540 dnl enable_symvers=???
1541 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1545 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1551 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1552 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1553 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1554 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1559 # Everything parsed; figure out what file to use.
1560 case $enable_symvers in
1562 SYMVER_MAP=config/linker-map.dummy
1565 SYMVER_MAP=config/linker-map.gnu
1566 AC_DEFINE(_GLIBCXX_SYMVER)
1570 AC_SUBST(SYMVER_MAP)
1571 AC_SUBST(port_specific_symbol_files)
1572 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1573 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1578 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1579 dnl We must stage the required headers so that they will be installed
1580 dnl with the library (unlike libgcc, the STL implementation is provided
1581 dnl solely within headers). Since we must not inject random user-space
1582 dnl macro names into user-provided C++ code, we first stage into <file>-in
1583 dnl and process to <file> with an output command. The reason for a two-
1584 dnl stage process here is to correctly handle $srcdir!=$objdir without
1585 dnl having to write complex code (the sed commands to clean the macro
1586 dnl namespace are complex and fragile enough as it is). We must also
1587 dnl add a relative path so that -I- is supported properly.
1590 dnl glibcxx_thread_h
1593 dnl HAVE_GTHR_DEFAULT
1594 dnl _GLIBCXX_SUPPORTS_WEAK
1596 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1597 AC_MSG_CHECKING([for thread model used by GCC])
1598 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1599 AC_MSG_RESULT([$target_thread_file])
1601 if test $target_thread_file != single; then
1602 AC_DEFINE(HAVE_GTHR_DEFAULT)
1603 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1606 glibcxx_thread_h=gthr-$target_thread_file.h
1607 AC_SUBST(glibcxx_thread_h)
1611 # Check whether LC_MESSAGES is available in <locale.h>.
1612 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1614 # This file file be copied and used freely without restrictions. It can
1615 # be used in projects which are not available under the GNU Public License
1616 # but which still want to provide support for the GNU gettext functionality.
1617 # Please note that the actual code is *not* freely available.
1620 AC_DEFUN(AC_LC_MESSAGES, [
1621 AC_CHECK_HEADER(locale.h, [
1622 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1623 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1624 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1625 if test $ac_cv_val_LC_MESSAGES = yes; then
1626 AC_DEFINE(HAVE_LC_MESSAGES)
1632 sinclude([../libtool.m4])
1633 dnl The lines below arrange for aclocal not to bring an installed
1634 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1635 dnl add a definition of LIBTOOL to Makefile.in.
1636 ifelse(,,,[AC_SUBST(LIBTOOL)
1637 AC_DEFUN([AM_PROG_LIBTOOL])
1638 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1639 AC_DEFUN([AC_PROG_LD])
1642 dnl vim:et:ts=2:sw=2