3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN(GLIBCXX_CONDITIONAL, [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN(GLIBCXX_EVALUATE_CONDITIONALS, [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN(GLIBCXX_CHECK_HOST, [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE(CPU config directory is $cpu_include_dir)
27 AC_MSG_NOTICE(OS config directory is $os_include_dir)
32 dnl Initialize basic configure bits.
37 AC_DEFUN(GLIBCXX_TOPREL_CONFIGURE, [
38 # Sets up multi_basedir, which is srcdir/.. plus the usual
39 # "multi_source_toprel_bottom_adjust" lunacy as needed.
40 AM_ENABLE_MULTILIB(, ..)
42 # The generated code is exactly the same, except that automake's looks in
43 # ".. $srcdir/.." and autoconf's looks in multi_basedir. Apparently other
44 # things are triggered on the presence of the two ...AUX_DIR[S], but I don't
45 # know what they are or what the other differences might be (and they keep
48 # Looking in multi_basedir seems smarter, so actually execute that branch.
50 # this is for automake
53 # this is for autoconf
54 AC_CONFIG_AUX_DIRS(${multi_basedir})
63 dnl Initialize the rest of the library configury. At this point we have
64 dnl variables like $host.
67 dnl gcc_version (x.y.z format)
70 dnl glibcxx_builddir (absolute path)
71 dnl glibcxx_srcdir (absolute path)
72 dnl toplevel_srcdir (absolute path)
75 dnl with_target_subdir
77 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
78 dnl - default settings for all AM_CONFITIONAL test variables
79 dnl - lots of tools, like CC and CXX
81 AC_DEFUN(GLIBCXX_CONFIGURE, [
82 # Keep these sync'd with the list in Makefile.am. The first provides an
83 # expandable list at autoconf time; the second provides an expandable list
84 # (i.e., shell variable) at configure time.
85 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
86 SUBDIRS='glibcxx_SUBDIRS'
88 # These need to be absolute paths, yet at the same time need to
89 # canonicalize only relative paths, because then amd will not unmount
90 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
91 glibcxx_builddir=`${PWDCMD-pwd}`
93 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
94 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
96 toplevel_srcdir=${glibcxx_srcdir}/..
97 AC_SUBST(glibcxx_builddir)
98 AC_SUBST(glibcxx_srcdir)
99 AC_SUBST(toplevel_srcdir)
101 # We use these options to decide which functions to include. They are
102 # set from the top level.
103 AC_ARG_WITH([target-subdir],
104 AC_HELP_STRING([--with-target-subdir=SUBDIR],
105 [configuring in a subdirectory]))
107 AC_ARG_WITH([cross-host],
108 AC_HELP_STRING([--with-cross-host=HOST],
109 [configuring with a cross compiler]))
111 AC_ARG_WITH([newlib],
112 AC_HELP_STRING([--with-newlib],
113 [assume newlib as a system C library]))
115 # We're almost certainly being configured before anything else which uses
116 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
117 # we not cache the value of CXX that we "discover" here, because it's set
118 # to something unique for us and libjava. Other target libraries need to
119 # find CXX for themselves. We yank the rug out from under the normal AC_*
120 # process by sneakily renaming the cache variable. This also lets us debug
121 # the value of "our" CXX in postmortems.
123 # We must also force CXX to /not/ be a precious variable, otherwise the
124 # wrong (non-multilib-adjusted) value will be used in multilibs. This
125 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
126 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
127 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
129 # -fno-builtin must be present here so that a non-conflicting form of
130 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
132 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
133 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
134 m4_define([_AC_ARG_VAR_PRECIOUS],[])
135 save_CXXFLAGS="$CXXFLAGS"
136 CXXFLAGS="$CXXFLAGS -fno-builtin"
139 CXXFLAGS="$save_CXXFLAGS"
140 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
144 # For directory versioning (e.g., headers) and other variables.
145 AC_MSG_CHECKING([for GCC version number])
146 gcc_version=`$CXX -dumpversion`
147 AC_MSG_RESULT($gcc_version)
149 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
150 # available). Uncomment the next line to force a particular method.
154 AC_CHECK_TOOL(AS, as)
155 AC_CHECK_TOOL(AR, ar)
156 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
160 # Set up safe default values for all subsequent AM_CONDITIONAL tests
161 # which are themselves conditionally expanded.
162 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
163 ## other macros from doing the same. This should be automated.) -pme
166 #enable_libstdcxx_debug=no
167 #enable_libstdcxx_pch=no
172 #enable_hosted_libstdcxx=yes
174 # Find platform-specific directories containing configuration info.
175 # Also possibly modify flags used elsewhere, as needed by the platform.
180 m4_include([linkage.m4])
181 m4_include([../config/no-executables.m4])
185 dnl Tests for newer compiler features, or features that are present in newer
186 dnl compiler versions but not older compiler versions still in use, should
190 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
191 dnl new inlining code or the new system_header pragma will die on -Werror.
192 dnl Leave it out by default and use maint-mode to use it.
193 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
194 dnl compiler supports it and the user has not requested debug mode.
196 AC_DEFUN(GLIBCXX_CHECK_COMPILER_FEATURES, [
197 # All these tests are for C++; save the language and the compiler flags.
198 # The CXXFLAGS thing is suspicious, but based on similar bits previously
199 # found in GLIBCXX_CONFIGURE.
202 ac_test_CXXFLAGS="${CXXFLAGS+set}"
203 ac_save_CXXFLAGS="$CXXFLAGS"
205 # Check for maintainer-mode bits.
206 if test x"$USE_MAINTAINER_MODE" = xno; then
212 # Check for -ffunction-sections -fdata-sections
213 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
214 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
215 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
216 if test "$ac_test_CXXFLAGS" = set; then
217 CXXFLAGS="$ac_save_CXXFLAGS"
219 # this is the suspicious part
222 if test x"$ac_fdsections" = x"yes"; then
223 SECTION_FLAGS='-ffunction-sections -fdata-sections'
225 AC_MSG_RESULT($ac_fdsections)
229 AC_SUBST(SECTION_FLAGS)
234 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
235 dnl the native linker is in use, all variables will be defined to something
236 dnl safe (like an empty string).
239 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
240 dnl OPT_LDFLAGS='-Wl,-O1' if possible
241 dnl LD (as a side effect of testing)
244 dnl glibcxx_gnu_ld_version (possibly)
246 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
247 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
249 AC_DEFUN(GLIBCXX_CHECK_LINKER_FEATURES, [
250 # If we're not using GNU ld, then there's no point in even trying these
251 # tests. Check for that first. We should have already tested for gld
252 # by now (in libtool), but require it now just to be safe...
253 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
254 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
255 AC_REQUIRE([AC_PROG_LD])
256 AC_REQUIRE([AC_PROG_AWK])
258 # The name set by libtool depends on the version of libtool. Shame on us
259 # for depending on an impl detail, but c'est la vie. Older versions used
260 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
261 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
262 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
263 # set (hence we're using an older libtool), then set it.
264 if test x${with_gnu_ld+set} != xset; then
265 if test x${ac_cv_prog_gnu_ld+set} != xset; then
266 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
269 with_gnu_ld=$ac_cv_prog_gnu_ld
273 # Start by getting the version number. I think the libtool test already
274 # does some of this, but throws away the result.
276 ldver=`$LD --version 2>/dev/null | head -1 | \
277 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
279 glibcxx_gnu_ld_version=`echo $ldver | \
280 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
283 if test "$with_gnu_ld" = "notbroken"; then
284 # GNU ld it is! Joy and bunny rabbits!
286 # All these tests are for C++; save the language and the compiler flags.
287 # Need to do this so that g++ won't try to link in libstdc++
288 ac_test_CFLAGS="${CFLAGS+set}"
289 ac_save_CFLAGS="$CFLAGS"
290 CFLAGS='-x c++ -Wl,--gc-sections'
292 # Check for -Wl,--gc-sections
293 # XXX This test is broken at the moment, as symbols required for linking
294 # are now in libsupc++ (not built yet). In addition, this test has
295 # cored on solaris in the past. In addition, --gc-sections doesn't
296 # really work at the moment (keeps on discarding used sections, first
297 # .eh_frame and now some of the glibc sections for iconv).
298 # Bzzzzt. Thanks for playing, maybe next time.
299 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
307 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
308 if test "$ac_test_CFLAGS" = set; then
309 CFLAGS="$ac_save_CFLAGS"
311 # this is the suspicious part
314 if test "$ac_sectionLDflags" = "yes"; then
315 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
317 AC_MSG_RESULT($ac_sectionLDflags)
320 # Set linker optimization flags.
321 if test x"$with_gnu_ld" = x"yes"; then
322 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
325 AC_SUBST(SECTION_LDFLAGS)
326 AC_SUBST(OPT_LDFLAGS)
331 dnl Check to see if this target can enable the wchar_t parts.
332 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
333 dnl must have been previously checked.) By default, wide characters are
337 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
338 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
340 AC_DEFUN(GLIBCXX_CHECK_WCHAR_T_SUPPORT, [
341 # Test wchar.h for mbstate_t, which is needed for char_traits and
342 # others even if wchar_t support is not on.
343 AC_MSG_CHECKING([for mbstate_t])
344 AC_TRY_COMPILE([#include <wchar.h>],
345 [mbstate_t teststate;],
346 have_mbstate_t=yes, have_mbstate_t=no)
347 AC_MSG_RESULT($have_mbstate_t)
348 if test x"$have_mbstate_t" = xyes; then
349 AC_DEFINE(HAVE_MBSTATE_T)
352 # Sanity check for existence of ISO C99 headers for extended encoding.
353 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
354 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
356 # Only continue checking if the ISO C99 headers exist and support is on.
357 if test x"$ac_has_wchar_h" = xyes &&
358 test x"$ac_has_wctype_h" = xyes &&
359 test x"$enable_c_mbchar" != xno; then
361 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
362 # numeric_limits can instantiate type_traits<wchar_t>
363 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
364 AC_TRY_COMPILE([#include <wchar.h>],
365 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
366 has_wchar_minmax=yes, has_wchar_minmax=no)
367 AC_MSG_RESULT($has_wchar_minmax)
369 # Test wchar.h for WEOF, which is what we use to determine whether
370 # to specialize for char_traits<wchar_t> or not.
371 AC_MSG_CHECKING([for WEOF])
374 #include <stddef.h>],
376 has_weof=yes, has_weof=no)
377 AC_MSG_RESULT($has_weof)
379 # Tests for wide character functions used in char_traits<wchar_t>.
381 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
384 # Checks for names injected into std:: by the c_std headers.
385 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
386 fwprintf fwscanf swprintf swscanf vfwprintf vswprintf \
387 vwprintf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
388 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstol \
389 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
390 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
393 # Checks for wide character functions that are not required
394 # for basic wchar_t support. Don't disable support if they are missing.
395 # Injection of these is wrapped with guard macros.
396 AC_CHECK_FUNCS([vfwscanf vswscanf vwscanf wcstof iswblank],[],[])
398 AC_MSG_CHECKING([for ISO C99 wchar_t support])
399 if test x"$has_weof" = xyes &&
400 test x"$has_wchar_minmax" = xyes &&
401 test x"$ac_wfuncs" = xyes;
403 ac_isoC99_wchar_t=yes
407 AC_MSG_RESULT($ac_isoC99_wchar_t)
409 # Use iconv for wchar_t to char conversions. As such, check for
410 # X/Open Portability Guide, version 2 features (XPG2).
411 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
412 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
414 # Check for existence of libiconv.a providing XPG2 wchar_t support.
415 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
417 LIBS="$LIBS $libiconv"
419 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
420 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
424 AC_MSG_CHECKING([for XPG2 wchar_t support])
425 if test x"$ac_has_iconv_h" = xyes &&
426 test x"$ac_has_langinfo_h" = xyes &&
427 test x"$ac_XPG2funcs" = xyes;
433 AC_MSG_RESULT($ac_XPG2_wchar_t)
435 # At the moment, only enable wchar_t specializations if all the
436 # above support is present.
437 if test x"$ac_isoC99_wchar_t" = xyes &&
438 test x"$ac_XPG2_wchar_t" = xyes;
440 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
444 AC_MSG_CHECKING([for enabled wchar_t specializations])
445 AC_MSG_RESULT($enable_wchar_t)
450 dnl Check for headers for, and arguments to, the setrlimit() function.
451 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
454 dnl _GLIBCXX_MEM_LIMITS if we can set artificial limits on memory
455 dnl various HAVE_MEMLIMIT_* for individual limit names
457 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT_ancilliary, [
460 #include <sys/time.h>
461 #include <sys/resource.h>
463 [ int f = RLIMIT_$1 ; ],
464 [glibcxx_mresult=1], [glibcxx_mresult=0])
465 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcxx_mresult,
466 [Only used in build directory testsuite_hooks.h.])
469 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT, [
470 setrlimit_have_headers=yes
471 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
473 [setrlimit_have_headers=no])
474 # If don't have the headers, then we can't run the tests now, and we
475 # won't be seeing any of these during testsuite compilation.
476 if test $setrlimit_have_headers = yes; then
477 # Can't do these in a loop, else the resulting syntax is wrong.
478 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
479 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
480 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
481 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
483 # Check for rlimit, setrlimit.
484 AC_CACHE_VAL(ac_setrlimit, [
487 #include <sys/time.h>
488 #include <sys/resource.h>
492 [ac_setrlimit=yes], [ac_setrlimit=no])
496 AC_MSG_CHECKING([for testsuite memory limit support])
497 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
499 AC_DEFINE(_GLIBCXX_MEM_LIMITS)
503 AC_MSG_RESULT($ac_mem_limits)
508 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
509 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
511 AC_DEFUN(GLIBCXX_CHECK_S_ISREG_OR_S_IFREG, [
512 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
514 [#include <sys/stat.h>],
517 S_ISREG(buffer.st_mode);],
518 [glibcxx_cv_S_ISREG=yes],
519 [glibcxx_cv_S_ISREG=no])
521 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
523 [#include <sys/stat.h>],
526 S_IFREG & buffer.st_mode;],
527 [glibcxx_cv_S_IFREG=yes],
528 [glibcxx_cv_S_IFREG=no])
530 if test $glibcxx_cv_S_ISREG = yes; then
531 AC_DEFINE(HAVE_S_ISREG)
532 elif test $glibcxx_cv_S_IFREG = yes; then
533 AC_DEFINE(HAVE_S_IFREG)
539 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
541 AC_DEFUN(GLIBCXX_CHECK_POLL, [
542 AC_CACHE_VAL(glibcxx_cv_POLL, [
545 [struct pollfd pfd[1];
546 pfd[0].events = POLLIN;
548 [glibcxx_cv_POLL=yes],
549 [glibcxx_cv_POLL=no])
551 if test $glibcxx_cv_POLL = yes; then
558 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
560 AC_DEFUN(GLIBCXX_CHECK_WRITEV, [
561 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
563 [#include <sys/uio.h>],
564 [struct iovec iov[2];
566 [glibcxx_cv_WRITEV=yes],
567 [glibcxx_cv_WRITEV=no])
569 if test $glibcxx_cv_WRITEV = yes; then
570 AC_DEFINE(HAVE_WRITEV)
576 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
578 AC_DEFUN(GLIBCXX_CHECK_INT64_T, [
579 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
581 [#include <stdint.h>],
583 [glibcxx_cv_INT64_T=yes],
584 [glibcxx_cv_INT64_T=no])
586 if test $glibcxx_cv_INT64_T = yes; then
587 AC_DEFINE(HAVE_INT64_T)
593 dnl Check whether LFS support is available.
595 AC_DEFUN(GLIBCXX_CHECK_LFS, [
598 AC_CACHE_VAL(glibcxx_cv_LFS, [
604 lseek64(1, 0, SEEK_CUR);],
605 [glibcxx_cv_LFS=yes],
608 if test $glibcxx_cv_LFS = yes; then
609 AC_DEFINE(_GLIBCXX_USE_LFS)
616 dnl Does any necessary configuration of the testsuite directory. Generates
617 dnl the testsuite_hooks.h header.
619 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
622 dnl enable_abi_check / GLIBCXX_TEST_ABI
626 AC_DEFUN(GLIBCXX_CONFIGURE_TESTSUITE, [
627 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
628 # Do checks for memory limit functions.
629 GLIBCXX_CHECK_SETRLIMIT
631 # Look for setenv, so that extended locale tests can be performed.
632 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
634 if test $enable_symvers = no; then
639 enable_abi_check=no ;;
641 enable_abi_check=yes ;;
645 # Only build this as native, since automake does not understand
650 # Export file names for ABI checking.
651 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
652 AC_SUBST(baseline_dir)
654 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
655 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
660 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
664 dnl TOPLEVEL_INCLUDES
666 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
667 # Used for every C++ compile we perform.
669 -I$glibcxx_builddir/include/$host_alias \
670 -I$glibcxx_builddir/include \
671 -I$glibcxx_srcdir/libsupc++"
673 # For Canadian crosses, pick this up too.
674 if test $CANADIAN = yes; then
675 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
678 # Stuff in the actual top level. Currently only used by libsupc++ to
679 # get unwind* headers from the gcc dir.
680 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
681 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
683 # Now, export this to all the little Makefiles....
684 AC_SUBST(GLIBCXX_INCLUDES)
685 AC_SUBST(TOPLEVEL_INCLUDES)
690 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
691 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
694 dnl OPTIMIZE_CXXFLAGS
697 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
698 # Optimization flags that are probably a good idea for thrill-seekers. Just
699 # uncomment the lines below and make, everything else is ready to go...
700 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
702 AC_SUBST(OPTIMIZE_CXXFLAGS)
704 WARN_FLAGS='-Wall -W -Wwrite-strings -Wcast-qual'
710 dnl All installation directory information is determined here.
714 dnl glibcxx_prefixdir
715 dnl glibcxx_toolexecdir
716 dnl glibcxx_toolexeclibdir
718 dnl Assumes cross_compiling bits already done, and with_cross_host in
721 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
722 glibcxx_toolexecdir=no
723 glibcxx_toolexeclibdir=no
724 glibcxx_prefixdir=$prefix
726 AC_MSG_CHECKING([for gxx-include-dir])
727 AC_ARG_WITH([gxx-include-dir],
728 AC_HELP_STRING([--with-gxx-include-dir=DIR],
729 [installation directory for include files]),
731 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
732 no) gxx_include_dir=no ;;
733 *) gxx_include_dir=$withval ;;
735 [gxx_include_dir=no])
736 AC_MSG_RESULT($gxx_include_dir)
738 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
739 AC_ARG_ENABLE([version-specific-runtime-libs],
740 AC_HELP_STRING([--enable-version-specific-runtime-libs],
741 [Specify that runtime libraries should be installed in a compiler-specific directory]),
742 [case "$enableval" in
743 yes) version_specific_libs=yes ;;
744 no) version_specific_libs=no ;;
745 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
747 [version_specific_libs=no])
748 AC_MSG_RESULT($version_specific_libs)
750 # Default case for install directory for include files.
751 if test $version_specific_libs = no && test $gxx_include_dir = no; then
752 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
755 # Version-specific runtime libs processing.
756 if test $version_specific_libs = yes; then
757 # Need the gcc compiler version to know where to install libraries
758 # and header files if --enable-version-specific-runtime-libs option
760 if test x"$gxx_include_dir" = x"no"; then
761 gxx_include_dir='${libdir}/gcc-lib/${host_alias}/'$gcc_version/include/c++
763 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
764 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
767 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
768 # Install a library built with a cross compiler in tooldir, not libdir.
769 if test x"$glibcxx_toolexecdir" = x"no"; then
770 if test -n "$with_cross_host" &&
771 test x"$with_cross_host" != x"no"; then
772 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
773 glibcxx_toolexeclibdir='${toolexecdir}/lib'
775 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
776 glibcxx_toolexeclibdir='${libdir}'
778 multi_os_directory=`$CXX -print-multi-os-directory`
779 case $multi_os_directory in
780 .) ;; # Avoid trailing /.
781 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
785 AC_MSG_CHECKING([for install location])
786 AC_MSG_RESULT($gxx_include_dir)
788 AC_SUBST(glibcxx_prefixdir)
789 AC_SUBST(gxx_include_dir)
790 AC_SUBST(glibcxx_toolexecdir)
791 AC_SUBST(glibcxx_toolexeclibdir)
797 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
798 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
799 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
801 dnl See docs/html/17_intro/configury.html#enable for documentation.
803 m4_define([GLIBCXX_ENABLE],[dnl
804 m4_define([_g_switch],[--enable-$1])dnl
805 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
806 AC_ARG_ENABLE($1,_g_help,
811 m4_bpatsubst([$5],[permit ])) ;;
812 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
813 dnl Idea for future: generate a URL pointing to
814 dnl "onlinedocs/configopts.html#whatever"
821 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
825 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
826 m4_undefine([_g_switch])dnl
827 m4_undefine([_g_help])dnl
832 dnl Check for ISO/IEC 9899:1999 "C99" support.
834 dnl --enable-c99 defines _GLIBCXX_USE_C99
835 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
836 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
837 dnl Where DEFAULT is either `yes' or `no'.
838 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
840 AC_DEFUN(GLIBCXX_ENABLE_C99, [
841 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
846 # Check for the existence of <math.h> functions used if C99 is enabled.
848 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
849 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
850 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
851 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
852 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
853 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
854 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
855 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
856 AC_TRY_COMPILE([#include <math.h>],
857 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
858 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
859 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
860 AC_TRY_COMPILE([#include <math.h>],
861 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
862 AC_TRY_COMPILE([#include <math.h>],
863 [isunordered(0.0,0.0);],, [ac_c99_math=no])
864 AC_MSG_RESULT($ac_c99_math)
866 # Check for the existence in <stdio.h> of vscanf, et. al.
868 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
869 AC_TRY_COMPILE([#include <stdio.h>],
870 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
871 AC_TRY_COMPILE([#include <stdio.h>
873 void foo(char* fmt, ...)
874 {va_list args; va_start(args, fmt);
875 vfscanf(stderr, "%i", args);}],
876 [],, [ac_c99_stdio=no])
877 AC_TRY_COMPILE([#include <stdio.h>
879 void foo(char* fmt, ...)
880 {va_list args; va_start(args, fmt);
881 vscanf("%i", args);}],
882 [],, [ac_c99_stdio=no])
883 AC_TRY_COMPILE([#include <stdio.h>
885 void foo(char* fmt, ...)
886 {va_list args; va_start(args, fmt);
887 vsnprintf(fmt, 0, "%i", args);}],
888 [],, [ac_c99_stdio=no])
889 AC_TRY_COMPILE([#include <stdio.h>
891 void foo(char* fmt, ...)
892 {va_list args; va_start(args, fmt);
893 vsscanf(fmt, "%i", args);}],
894 [],, [ac_c99_stdio=no])
895 AC_MSG_RESULT($ac_c99_stdio)
897 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
899 AC_MSG_CHECKING([for lldiv_t declaration])
900 AC_CACHE_VAL(ac_c99_lldiv_t, [
901 AC_TRY_COMPILE([#include <stdlib.h>],
903 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
905 AC_MSG_RESULT($ac_c99_lldiv_t)
907 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
908 AC_TRY_COMPILE([#include <stdlib.h>],
909 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
910 AC_TRY_COMPILE([#include <stdlib.h>],
911 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
912 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
913 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
914 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
915 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
916 if test x"$ac_c99_lldiv_t" = x"no"; then
919 AC_MSG_RESULT($ac_c99_stdlib)
921 # Check for the existence of <wchar.h> functions used if C99 is enabled.
922 # XXX the wchar.h checks should be rolled into the general C99 bits.
924 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
925 AC_TRY_COMPILE([#include <wchar.h>],
926 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
927 AC_TRY_COMPILE([#include <wchar.h>],
928 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
929 AC_TRY_COMPILE([#include <wchar.h>],
930 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
931 AC_MSG_RESULT($ac_c99_wchar)
933 AC_MSG_CHECKING([for enabled ISO C99 support])
934 if test x"$ac_c99_math" = x"no" ||
935 test x"$ac_c99_stdio" = x"no" ||
936 test x"$ac_c99_stdlib" = x"no" ||
937 test x"$ac_c99_wchar" = x"no"; then
940 AC_MSG_RESULT($enable_c99)
942 # Option parsed, now set things appropriately
943 if test x"$enable_c99" = x"yes"; then
944 AC_DEFINE(_GLIBCXX_USE_C99)
952 dnl Check for what type of C headers to use.
954 dnl --enable-cheaders= [does stuff].
955 dnl --disable-cheaders [does not do anything, really].
956 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
957 dnl Where DEFAULT is either `c' or `c_std'.
959 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
960 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
961 [construct "C" headers for g++], [permit c|c_std])
962 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
964 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
966 AC_SUBST(C_INCLUDE_DIR)
967 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
968 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
969 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
974 dnl Check for which locale library to use. The choice is mapped to
975 dnl a subdirectory of config/locale.
977 dnl Default is generic.
979 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
980 AC_MSG_CHECKING([for C locale to use])
981 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
982 [use MODEL for target locale package],
983 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
985 # If they didn't use this option switch, or if they specified --enable
986 # with no specific model, we'll have to look for one. If they
987 # specified --disable (???), do likewise.
988 if test $enable_clocale = no || test $enable_clocale = yes; then
992 # Either a known package, or "auto"
993 enable_clocale_flag=$enable_clocale
995 # Probe for locale support if no specific model is specified.
996 # Default to "generic".
997 if test $enable_clocale_flag = auto; then
998 case x${target_os} in
999 xlinux* | xgnu* | xkfreebsd*-gnu | xknetbsd*-gnu)
1000 AC_EGREP_CPP([_GLIBCXX_ok], [
1001 #include <features.h>
1002 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1005 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1007 # Test for bugs early in glibc-2.2.x series
1008 if test x$enable_clocale_flag = xgnu; then
1010 #define _GNU_SOURCE 1
1013 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1014 extern __typeof(newlocale) __newlocale;
1015 extern __typeof(duplocale) __duplocale;
1016 extern __typeof(strcoll_l) __strcoll_l;
1020 const char __one[] = "Äuglein Augmen";
1021 const char __two[] = "Äuglein";
1026 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1027 loc_dup = __duplocale(loc);
1028 i = __strcoll_l(__one, __two, loc);
1029 j = __strcoll_l(__one, __two, loc_dup);
1033 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1034 [enable_clocale_flag=generic])
1037 # ... at some point put __strxfrm_l tests in as well.
1040 enable_clocale_flag=generic
1045 # Deal with gettext issues. Default to not using it (=no) until we detect
1046 # support for it later. Let the user turn it off via --e/d, but let that
1047 # default to on for easier handling.
1050 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1054 # Set configure bits for specified locale package
1055 case ${enable_clocale_flag} in
1057 AC_MSG_RESULT(generic)
1059 CLOCALE_H=config/locale/generic/c_locale.h
1060 CLOCALE_CC=config/locale/generic/c_locale.cc
1061 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1062 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1063 CCOLLATE_CC=config/locale/generic/collate_members.cc
1064 CCTYPE_CC=config/locale/generic/ctype_members.cc
1065 CMESSAGES_H=config/locale/generic/messages_members.h
1066 CMESSAGES_CC=config/locale/generic/messages_members.cc
1067 CMONEY_CC=config/locale/generic/monetary_members.cc
1068 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1069 CTIME_H=config/locale/generic/time_members.h
1070 CTIME_CC=config/locale/generic/time_members.cc
1071 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1076 # Declare intention to use gettext, and add support for specific
1078 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1081 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1082 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1083 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1086 # Export the build objects.
1087 for ling in $ALL_LINGUAS; do \
1088 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1089 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1091 AC_SUBST(glibcxx_MOFILES)
1092 AC_SUBST(glibcxx_POFILES)
1094 CLOCALE_H=config/locale/gnu/c_locale.h
1095 CLOCALE_CC=config/locale/gnu/c_locale.cc
1096 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1097 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1098 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1099 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1100 CMESSAGES_H=config/locale/gnu/messages_members.h
1101 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1102 CMONEY_CC=config/locale/gnu/monetary_members.cc
1103 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1104 CTIME_H=config/locale/gnu/time_members.h
1105 CTIME_CC=config/locale/gnu/time_members.cc
1106 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1109 AC_MSG_RESULT(IEEE 1003.1)
1111 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1112 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1113 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1114 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1115 CCOLLATE_CC=config/locale/generic/collate_members.cc
1116 CCTYPE_CC=config/locale/generic/ctype_members.cc
1117 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1118 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1119 CMONEY_CC=config/locale/generic/monetary_members.cc
1120 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1121 CTIME_H=config/locale/generic/time_members.h
1122 CTIME_CC=config/locale/generic/time_members.cc
1123 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1127 # This is where the testsuite looks for locale catalogs, using the
1128 # -DLOCALEDIR define during testsuite compilation.
1129 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1130 AC_SUBST(glibcxx_localedir)
1132 # A standalone libintl (e.g., GNU libintl) may be in use.
1133 if test $USE_NLS = yes; then
1134 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1135 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1137 if test $USE_NLS = yes; then
1138 AC_DEFINE(_GLIBCXX_USE_NLS)
1143 AC_SUBST(CCODECVT_H)
1144 AC_SUBST(CMESSAGES_H)
1145 AC_SUBST(CCODECVT_CC)
1146 AC_SUBST(CCOLLATE_CC)
1148 AC_SUBST(CMESSAGES_CC)
1150 AC_SUBST(CNUMERIC_CC)
1153 AC_SUBST(CLOCALE_CC)
1154 AC_SUBST(CLOCALE_INTERNAL_H)
1159 dnl Check for whether the Boost-derived checks should be turned on.
1161 dnl --enable-concept-checks turns them on.
1162 dnl --disable-concept-checks leaves them off.
1163 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1164 dnl Where DEFAULT is either `yes' or `no'.
1166 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1167 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1168 if test $enable_concept_checks = yes; then
1169 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1175 dnl Check for which I/O library to use: stdio, or something specific.
1177 dnl Default is stdio.
1179 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1180 AC_MSG_CHECKING([for underlying I/O to use])
1181 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1182 [use target-specific I/O package], [permit stdio])
1184 # Now that libio has been removed, you can have any color you want as long
1185 # as it's black. This is one big no-op until other packages are added, but
1186 # showing the framework never hurts.
1187 case ${enable_cstdio} in
1189 CSTDIO_H=config/io/c_io_stdio.h
1190 BASIC_FILE_H=config/io/basic_file_stdio.h
1191 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1192 AC_MSG_RESULT(stdio)
1197 AC_SUBST(BASIC_FILE_H)
1198 AC_SUBST(BASIC_FILE_CC)
1203 dnl Check for "unusual" flags to pass to the compiler while building.
1205 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1206 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1207 dnl --disable-cxx-flags passes nothing.
1208 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1209 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1210 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1211 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1212 dnl If "default flags" is an empty string, the effect is the same
1213 dnl as --disable or --enable=no.
1215 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1216 AC_MSG_CHECKING([for extra compiler flags for building])
1217 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1218 [pass compiler FLAGS when building library],
1219 [case "x$enable_cxx_flags" in
1220 xno | x) enable_cxx_flags= ;;
1222 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1225 # Run through flags (either default or command-line) and set anything
1226 # extra (e.g., #defines) that must accompany particular g++ options.
1227 if test -n "$enable_cxx_flags"; then
1228 for f in $enable_cxx_flags; do
1232 *) # and we're trying to pass /what/ exactly?
1233 AC_MSG_ERROR([compiler flags start with a -]) ;;
1238 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1239 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1240 AC_SUBST(EXTRA_CXX_FLAGS)
1245 dnl Check for wide character support. Has the same effect as the option
1246 dnl in gcc's configure, but in a form that autoconf can mess with.
1248 dnl --enable-c-mbchar requests all the wchar_t stuff.
1249 dnl --disable-c-mbchar doesn't.
1250 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1251 dnl Where DEFAULT is either `yes' or `no'.
1253 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1254 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1255 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1260 dnl Check to see if debugging libraries are to be built.
1262 dnl --enable-libstdcxx-debug
1263 dnl builds a separate set of debugging libraries in addition to the
1264 dnl normal (shared, static) libstdc++ binaries.
1266 dnl --disable-libstdcxx-debug
1267 dnl builds only one (non-debug) version of libstdc++.
1269 dnl --enable-libstdcxx-debug-flags=FLAGS
1270 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1272 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1273 dnl Where DEFAULT is either `yes' or `no'.
1275 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1276 AC_MSG_CHECKING([for additional debug build])
1277 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1278 AC_MSG_RESULT($enable_libstdcxx_debug)
1279 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1284 dnl Check for explicit debug flags.
1286 dnl --enable-libstdcxx-debug-flags='-O1'
1287 dnl is a general method for passing flags to be used when
1288 dnl building debug libraries with --enable-debug.
1290 dnl --disable-libstdcxx-debug-flags does nothing.
1291 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1292 dnl If "default flags" is an empty string, the effect is the same
1293 dnl as --disable or --enable=no.
1295 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1296 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1297 [pass compiler FLAGS when building debug library],
1298 [case "x$enable_libstdcxx_debug_flags" in
1299 xno | x) enable_libstdcxx_debug_flags= ;;
1301 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1304 # Option parsed, now set things appropriately
1305 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1306 AC_SUBST(DEBUG_FLAGS)
1308 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1313 dnl Check if the user only wants a freestanding library implementation.
1315 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1316 dnl installing only the headers required by [17.4.1.3] and the language
1317 dnl support library. More than that will be built (to keep the Makefiles
1318 dnl conveniently clean), but not installed.
1321 dnl is_hosted (yes/no)
1324 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1326 AC_DEFUN(GLIBCXX_ENABLE_HOSTED, [
1327 AC_ARG_ENABLE([hosted-libstdcxx],
1328 AC_HELP_STRING([--disable-hosted-libstdcxx],
1329 [only build freestanding C++ runtime support]),,
1330 [enable_hosted_libstdcxx=yes])
1331 if test "$enable_hosted_libstdcxx" = no; then
1332 AC_MSG_NOTICE([Only freestanding libraries will be built])
1336 enable_libstdcxx_pch=no
1341 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1342 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1343 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1348 dnl Check for libunwind exception handling support. If enabled, then
1349 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1350 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1351 dnl libunwind instead of libgcc, and that libstdc++ has a dependency
1352 dnl on libunwind as well as libgcc.
1354 dnl --enable-libunwind-exceptions forces the use of libunwind.
1355 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1360 AC_DEFUN(GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS, [
1361 AC_MSG_CHECKING([for use of libunwind])
1362 GLIBCXX_ENABLE(libunwind-exceptions,no,,
1363 [force use of libunwind for exceptions])
1364 AC_MSG_RESULT($use_libunwind_exceptions)
1365 if test $enable_libunwind_exceptions = yes; then
1366 LIBUNWIND_FLAG="-lunwind"
1370 AC_SUBST(LIBUNWIND_FLAG)
1375 dnl Check for template specializations for the 'long long' type extension.
1376 dnl The result determines only whether 'long long' I/O is enabled; things
1377 dnl like numeric_limits<> specializations are always available.
1379 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1380 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1381 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1382 dnl Where DEFAULT is either `yes' or `no'.
1383 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1385 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1386 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1391 AC_MSG_CHECKING([for enabled long long I/O support])
1392 # iostreams require strtoll, strtoull to compile
1393 AC_TRY_COMPILE([#include <stdlib.h>],
1394 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1395 AC_TRY_COMPILE([#include <stdlib.h>],
1396 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1398 # Option parsed, now set things appropriately
1399 if test $enable_long_long = yes; then
1400 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1402 AC_MSG_RESULT($enable_long_long)
1409 dnl Check to see if building and using a C++ precompiled header can be done.
1411 dnl --enable-libstdcxx-pch=yes
1412 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1413 dnl may work, after some light-hearted attempts to puzzle out compiler
1414 dnl support, flip bits on in include/Makefile.am
1416 dnl --disable-libstdcxx-pch
1417 dnl turns off attempts to use or build stdc++.h.gch.
1420 dnl glibcxx_PCHFLAGS
1422 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1423 AC_MSG_CHECKING([for enabled PCH])
1424 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1425 AC_MSG_RESULT([$enable_libstdcxx_pch])
1427 if test $enable_libstdcxx_pch = yes; then
1428 AC_CACHE_CHECK([for compiler with PCH support],
1429 [glibcxx_cv_prog_CXX_pch],
1430 [ac_save_CXXFLAGS="$CXXFLAGS"
1431 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1434 echo '#include <math.h>' > conftest.h
1435 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1436 -o conftest.h.gch 1>&5 2>&1 &&
1437 echo '#error "pch failed"' > conftest.h &&
1438 echo '#include "conftest.h"' > conftest.cc &&
1439 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1441 glibcxx_cv_prog_CXX_pch=yes
1443 glibcxx_cv_prog_CXX_pch=no
1446 CXXFLAGS=$ac_save_CXXFLAGS
1449 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1452 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1453 if test $enable_libstdcxx_pch = yes; then
1454 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1458 AC_SUBST(glibcxx_PCHFLAGS)
1463 dnl Check for exception handling support. If an explicit enable/disable
1464 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1465 dnl target may or may not support call frame exceptions.
1467 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1468 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1469 dnl Neither one forces an attempt at detection.
1472 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1474 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1475 AC_MSG_CHECKING([for exception model to use])
1478 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1479 [force use of builtin_setjmp for exceptions],
1480 [permit yes|no|auto])
1482 if test $enable_sjlj_exceptions = auto; then
1483 # Botheration. Now we've got to detect the exception model. Link tests
1484 # against libgcc.a are problematic since we've not been given proper -L
1485 # bits for single-tree newlib and libgloss.
1487 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1488 cat > conftest.$ac_ext << EOF
1489 [#]line __oline__ "configure"
1498 old_CXXFLAGS="$CXXFLAGS"
1500 if AC_TRY_EVAL(ac_compile); then
1501 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1502 enable_sjlj_exceptions=yes
1503 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1504 enable_sjlj_exceptions=no
1507 CXXFLAGS="$old_CXXFLAGS"
1511 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1512 # to two different models.
1513 case $enable_sjlj_exceptions in
1515 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1516 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1517 ac_exception_model_name=sjlj
1520 ac_exception_model_name="call frame"
1523 AC_MSG_ERROR([unable to detect exception model])
1527 AC_MSG_RESULT($ac_exception_model_name)
1532 dnl Add version tags to symbols in shared library (or not), additionally
1533 dnl marking other symbols as private/local (or not).
1535 dnl --enable-symvers=style adds a version script to the linker call when
1536 dnl creating the shared library. The choice of version script is
1537 dnl controlled by 'style'.
1538 dnl --disable-symvers does not.
1539 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1540 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1541 dnl choose a default style based on linker characteristics. Passing
1542 dnl 'no' disables versioning.
1544 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1546 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1547 [enables symbol versioning of the shared library],
1548 [permit yes|no|gnu])
1550 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1551 # don't know enough about $LD to do tricks...
1552 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1553 # FIXME The following test is too strict, in theory.
1554 if test $enable_shared = no ||
1556 test x$glibcxx_gnu_ld_version = x; then
1560 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1561 if test $enable_symvers != no; then
1562 AC_MSG_CHECKING([for shared libgcc])
1563 ac_save_CFLAGS="$CFLAGS"
1565 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1566 CFLAGS="$ac_save_CFLAGS"
1567 AC_MSG_RESULT($glibcxx_shared_libgcc)
1570 # For GNU ld, we need at least this version. The format is described in
1571 # GLIBCXX_CHECK_LINKER_FEATURES above.
1572 glibcxx_min_gnu_ld_version=21400
1573 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1575 # Check to see if unspecified "yes" value can win, given results above.
1576 # Change "yes" into either "no" or a style name.
1577 if test $enable_symvers = yes; then
1578 if test $with_gnu_ld = yes &&
1579 test $glibcxx_shared_libgcc = yes;
1581 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1584 # The right tools, the right setup, but too old. Fallbacks?
1585 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1586 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1587 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1588 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1589 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1590 # Globbing fix is present, proper block support is not.
1591 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1592 dnl enable_symvers=???
1593 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1597 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1603 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1604 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1605 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1606 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1611 # Everything parsed; figure out what file to use.
1612 case $enable_symvers in
1614 SYMVER_MAP=config/linker-map.dummy
1617 SYMVER_MAP=config/linker-map.gnu
1618 AC_DEFINE(_GLIBCXX_SYMVER)
1622 AC_SUBST(SYMVER_MAP)
1623 AC_SUBST(port_specific_symbol_files)
1624 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1625 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1630 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1631 dnl We must stage the required headers so that they will be installed
1632 dnl with the library (unlike libgcc, the STL implementation is provided
1633 dnl solely within headers). Since we must not inject random user-space
1634 dnl macro names into user-provided C++ code, we first stage into <file>-in
1635 dnl and process to <file> with an output command. The reason for a two-
1636 dnl stage process here is to correctly handle $srcdir!=$objdir without
1637 dnl having to write complex code (the sed commands to clean the macro
1638 dnl namespace are complex and fragile enough as it is). We must also
1639 dnl add a relative path so that -I- is supported properly.
1642 dnl glibcxx_thread_h
1645 dnl HAVE_GTHR_DEFAULT
1646 dnl _GLIBCXX_SUPPORTS_WEAK
1648 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1649 AC_MSG_CHECKING([for thread model used by GCC])
1650 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1651 AC_MSG_RESULT([$target_thread_file])
1653 if test $target_thread_file != single; then
1654 AC_DEFINE(HAVE_GTHR_DEFAULT)
1655 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1658 glibcxx_thread_h=gthr-$target_thread_file.h
1659 AC_SUBST(glibcxx_thread_h)
1663 # Check whether LC_MESSAGES is available in <locale.h>.
1664 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1666 # This file file be copied and used freely without restrictions. It can
1667 # be used in projects which are not available under the GNU Public License
1668 # but which still want to provide support for the GNU gettext functionality.
1669 # Please note that the actual code is *not* freely available.
1672 AC_DEFUN(AC_LC_MESSAGES, [
1673 AC_CHECK_HEADER(locale.h, [
1674 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1675 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1676 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1677 if test $ac_cv_val_LC_MESSAGES = yes; then
1678 AC_DEFINE(HAVE_LC_MESSAGES)
1684 sinclude([../libtool.m4])
1685 dnl The lines below arrange for aclocal not to bring an installed
1686 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1687 dnl add a definition of LIBTOOL to Makefile.in.
1688 ifelse(,,,[AC_SUBST(LIBTOOL)
1689 AC_DEFUN([AM_PROG_LIBTOOL])
1690 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1691 AC_DEFUN([AC_PROG_LD])
1694 dnl vim:et:ts=2:sw=2