1 # configure.ac -- Go library configure script.
3 # Copyright 2009 The Go Authors. All rights reserved.
4 # Use of this source code is governed by a BSD-style
5 # license that can be found in the LICENSE file.
7 # Process this file with autoreconf to produce configure.
10 AC_INIT(package-unused, version-unused,, libgo)
11 AC_CONFIG_SRCDIR(Makefile.am)
12 AC_CONFIG_HEADER(config.h)
15 AC_SUBST(libtool_VERSION)
17 AM_ENABLE_MULTILIB(, ..)
20 target_alias=${target_alias-$host_alias}
22 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dist -Wall -Wno-portability])
23 AH_TEMPLATE(PACKAGE, [Name of package])
24 AH_TEMPLATE(VERSION, [Version number of package])
26 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibgo_PRECIOUS])
27 m4_define([_AC_ARG_VAR_PRECIOUS],[])
30 m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
38 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
42 AC_SUBST(enable_shared)
43 AC_SUBST(enable_static)
45 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
46 AC_SUBST(CC_FOR_BUILD)
50 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
53 dnl FIXME: This should be controlled by --enable-maintainer-mode.
58 glibgo_toolexeclibdir=no
60 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
61 AC_ARG_ENABLE([version-specific-runtime-libs],
62 AC_HELP_STRING([--enable-version-specific-runtime-libs],
63 [Specify that runtime libraries should be installed in a compiler-specific directory]),
65 yes) version_specific_libs=yes ;;
66 no) version_specific_libs=no ;;
67 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
69 [version_specific_libs=no])
70 AC_MSG_RESULT($version_specific_libs)
72 # Version-specific runtime libs processing.
73 if test $version_specific_libs = yes; then
74 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
75 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
78 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
79 # Install a library built with a cross compiler in tooldir, not libdir.
80 if test -n "$with_cross_host" &&
81 test x"$with_cross_host" != x"no"; then
82 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
83 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
85 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
86 nover_glibgo_toolexeclibdir='${libdir}'
88 multi_os_directory=`$CC -print-multi-os-directory`
89 case $multi_os_directory in
90 .) ;; # Avoid trailing /.
91 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
94 if test x"$glibgo_toolexecdir" = x"no"; then
95 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
96 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
99 AC_SUBST(glibgo_toolexecdir)
100 AC_SUBST(glibgo_toolexeclibdir)
101 AC_SUBST(nover_glibgo_toolexeclibdir)
103 # See if the user wants to configure without libffi. Some
104 # architectures don't support it. FIXME: We should set a default
107 AS_HELP_STRING([--without-libffi],
110 [with_libffi=${with_libffi_default-yes}])
114 if test "$with_libffi" != no; then
115 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
116 LIBFFI=../libffi/libffi_convenience.la
117 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
122 # Used to tell GNU make to include a file without telling automake to
124 go_include="-include"
137 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
138 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
139 *-*-irix6*) is_irix=yes; GOOS=irix ;;
140 *-*-linux*) is_linux=yes; GOOS=linux ;;
141 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
142 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
143 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
144 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
146 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
147 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
148 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
149 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
150 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
151 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
152 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
153 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
156 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
173 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
178 i[34567]86-*-* | x86_64-*-*)
184 [is_386=yes], [is_x86_64=yes])
185 if test "$is_386" = "yes"; then
197 #if _MIPS_SIM != _ABIO32
202 #if _MIPS_SIM != _ABIN32
207 #if _MIPS_SIM != _ABI64
212 #if _MIPS_SIM != _ABIO64
216 [AC_MSG_ERROR([unknown MIPS ABI])
217 [mips_abi="n32"]])])])])
219 "o32") GOARCH=mipso32 ;;
220 "n32") GOARCH=mipsn32 ;;
221 "n64") GOARCH=mipsn64 ;;
222 "o64") GOARCH=mipso64 ;;
225 rs6000*-*-* | powerpc*-*-*)
230 [is_ppc=yes], [is_ppc64=yes])
231 if test "$is_ppc" = "yes"; then
239 #if defined(__sparcv9) || defined(__arch64__)
242 [is_sparc=yes], [is_sparc64=yes])
243 if test "$is_sparc" = "yes"; then
250 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
251 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
252 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
253 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
254 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
255 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
256 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
257 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
258 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
259 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
260 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
261 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
262 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
263 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
266 dnl Some files are only present when needed for specific architectures.
268 GO_LIBCALL_OS_ARCH_FILE=
270 GO_SYSCALL_OS_ARCH_FILE=
271 if test -f ${srcdir}/go/syscall/libcall_${GOOS}.go; then
272 GO_LIBCALL_OS_FILE=go/syscall/libcall_${GOOS}.go
274 if test -f ${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go; then
275 GO_LIBCALL_OS_ARCH_FILE=go/syscall/libcall_${GOOS}_${GOARCH}.go
277 if test -f ${srcdir}/go/syscall/syscall_${GOOS}.go; then
278 GO_SYSCALL_OS_FILE=go/syscall/syscall_${GOOS}.go
280 if test -f ${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go; then
281 GO_SYSCALL_OS_ARCH_FILE=go/syscall/syscall_${GOOS}_${GOARCH}.go
283 AC_SUBST(GO_LIBCALL_OS_FILE)
284 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
285 AC_SUBST(GO_SYSCALL_OS_FILE)
286 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
288 dnl Special flags used to generate sysinfo.go.
289 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
292 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
293 # msghdr in <sys/socket.h>.
294 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
297 # Solaris 8/9 need this so struct msghdr gets the msg_control
298 # etc. fields in <sys/socket.h> (_XPG4_2).
299 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__"
301 *-*-solaris2.1[[01]])
302 # Solaris 10+ needs this so struct msghdr gets the msg_control
303 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
304 # above doesn't work with C99.
305 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
310 dnl Use -fsplit-stack when compiling C code if available.
311 AC_CACHE_CHECK([whether -fsplit-stack is supported],
312 [libgo_cv_c_split_stack_supported],
314 CFLAGS="$CFLAGS -fsplit-stack"
315 AC_COMPILE_IFELSE([[int i;]],
316 [libgo_cv_c_split_stack_supported=yes],
317 [libgo_cv_c_split_stack_supported=no])
318 CFLAGS=$CFLAGS_hold])
319 if test "$libgo_cv_c_split_stack_supported" = yes; then
320 SPLIT_STACK=-fsplit-stack
321 AC_DEFINE(USING_SPLIT_STACK, 1,
322 [Define if the compiler supports -fsplit-stack])
326 AC_SUBST(SPLIT_STACK)
327 AM_CONDITIONAL(USING_SPLIT_STACK,
328 test "$libgo_cv_c_split_stack_supported" = yes)
330 dnl Check whether the linker does stack munging when calling from
331 dnl split-stack into non-split-stack code. We check this by looking
332 dnl at the --help output. FIXME: This is only half right: it's
333 dnl possible for the linker to support this for some targets but not
335 AC_CACHE_CHECK([whether linker supports split stack],
336 [libgo_cv_c_linker_supports_split_stack],
337 libgo_cv_c_linker_supports_split_stack=no
338 if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
339 libgo_cv_c_linker_supports_split_stack=yes
341 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
342 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
343 [Define if the linker support split stack adjustments])
346 dnl Test for the -lm library.
348 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
351 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
352 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
353 [libgo_cv_lib_sockets=
355 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
356 if test "$libgo_check_socket" = "yes"; then
357 unset ac_cv_func_connect
358 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
359 libgo_check_both=yes)
361 if test "$libgo_check_both" = "yes"; then
363 LIBS="$LIBS -lsocket -lnsl"
364 unset ac_cv_func_accept
365 AC_CHECK_FUNC(accept,
367 libgo_cv_lib_sockets="-lsocket -lnsl"])
368 unset ac_cv_func_accept
371 unset ac_cv_func_gethostbyname
372 libgo_old_libs="$LIBS"
373 AC_CHECK_FUNC(gethostbyname, ,
374 [AC_CHECK_LIB(nsl, main,
375 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
376 unset ac_cv_func_gethostbyname
379 NET_LIBS="$libgo_cv_lib_sockets"
382 dnl Test whether the compiler supports the -pthread option.
383 AC_CACHE_CHECK([whether -pthread is supported],
384 [libgo_cv_lib_pthread],
386 CFLAGS="$CFLAGS -pthread"
387 AC_COMPILE_IFELSE([[int i;]],
388 [libgo_cv_lib_pthread=yes],
389 [libgo_cv_lib_pthread=no])
390 CFLAGS=$CFLAGS_hold])
392 if test "$libgo_cv_lib_pthread" = yes; then
393 PTHREAD_CFLAGS=-pthread
395 AC_SUBST(PTHREAD_CFLAGS)
397 dnl Test for the -lpthread library.
399 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
400 AC_SUBST(PTHREAD_LIBS)
402 dnl Test if -lrt is required for sched_yield.
403 AC_SEARCH_LIBS([sched_yield], [rt])
407 GCC_CHECK_UNWIND_GETIPINFO
409 AC_ARG_ENABLE(sjlj-exceptions,
410 AC_HELP_STRING([--enable-sjlj-exceptions],
411 [force use of builtin_setjmp for exceptions]),
412 [case "$enableval" in
414 *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
416 [enable_sjlj_exceptions=auto])
418 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
419 [libgo_cv_lib_sjlj_exceptions],
426 int i __attribute__ ((cleanup (clean)));
431 CFLAGS="--save-temps -fexceptions"
432 libgo_cv_lib_sjlj_exceptions=unknown
433 AS_IF([ac_fn_c_try_compile],
434 [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
435 libgo_cv_lib_sjlj_exceptions=yes
436 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
437 libgo_cv_lib_sjlj_exceptions=no
443 if test "$enable_sjlj_exceptions" = "auto"; then
444 enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
447 case $enable_sjlj_exceptions in
449 AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
450 [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
455 AC_MSG_ERROR([unable to detect exception model])
459 AC_CHECK_HEADERS(sys/file.h sys/mman.h syscall.h sys/epoll.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/reboot.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
461 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
462 [#ifdef HAVE_SYS_SOCKET_H
463 #include <sys/socket.h>
467 AC_CACHE_CHECK([whether <ustat.h> can be used],
468 [libgo_cv_c_ustat_h],
470 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
473 #include <sys/types.h>
474 #ifdef HAVE_LINUX_FILTER_H
475 #include <linux/filter.h>
478 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
479 CFLAGS=$CFLAGS_hold])
480 if test $libgo_cv_c_ustat_h = yes; then
481 AC_DEFINE(HAVE_USTAT_H, 1,
482 [Define to 1 if you have the <ustat.h> header file and it works.])
485 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
487 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv dl_iterate_phdr)
488 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
489 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
491 AC_CHECK_FUNCS(epoll_create1 faccessat fallocate fchmodat fchownat futimesat inotify_add_watch inotify_init inotify_init1 inotify_rm_watch mkdirat mknodat openat renameat sync_file_range splice tee unlinkat unshare)
493 AC_CHECK_TYPES([loff_t])
497 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
500 CFLAGS_hold="$CFLAGS"
501 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
503 LIBS="$LIBS $PTHREAD_LIBS"
504 AC_CHECK_FUNCS(sem_timedwait)
505 CFLAGS="$CFLAGS_hold"
509 LIBS="$LIBS $MATH_LIBS"
510 AC_CHECK_FUNCS(matherr)
513 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
514 [libgo_cv_func___sync_bool_compare_and_swap_4],
516 typedef unsigned int uint32 __attribute__ ((mode (SI)));
518 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
520 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
521 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
522 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
523 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
524 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
527 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
528 [libgo_cv_func___sync_bool_compare_and_swap_8],
530 typedef unsigned int uint64 __attribute__ ((mode (DI)));
532 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
534 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
535 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
536 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
537 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
538 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
541 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
542 [libgo_cv_func___sync_fetch_and_add_4],
544 typedef unsigned int uint32 __attribute__ ((mode (SI)));
546 int main() { return __sync_fetch_and_add (&i, 1); }
548 [libgo_cv_func___sync_fetch_and_add_4=yes],
549 [libgo_cv_func___sync_fetch_and_add_4=no])])
550 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
551 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
552 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
555 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
556 [libgo_cv_func___sync_add_and_fetch_8],
558 typedef unsigned int uint64 __attribute__ ((mode (DI)));
560 int main() { return __sync_add_and_fetch (&i, 1); }
562 [libgo_cv_func___sync_add_and_fetch_8=yes],
563 [libgo_cv_func___sync_add_and_fetch_8=no])])
564 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
565 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
566 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
569 dnl For x86 we want to use the -minline-all-stringops option to avoid
570 dnl forcing a stack split when calling memcpy and friends.
571 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
572 [libgo_cv_c_stringops],
574 CFLAGS="$CFLAGS -minline-all-stringops"
575 AC_COMPILE_IFELSE([int i;],
576 [libgo_cv_c_stringops=yes],
577 [libgo_cv_c_stringops=no])
578 CFLAGS=$CFLAGS_hold])
580 if test "$libgo_cv_c_stringops" = yes; then
581 STRINGOPS_FLAG=-minline-all-stringops
583 AC_SUBST(STRINGOPS_FLAG)
585 dnl For x86 we want to compile the math library with -mfancy-math-387
586 dnl -funsafe-math-optimizations so that we can use the builtin
587 dnl instructions directly.
588 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
589 [libgo_cv_c_fancymath],
591 CFLAGS="$CFLAGS -mfancy-math-387"
592 AC_COMPILE_IFELSE([int i;],
593 [libgo_cv_c_fancymath=yes],
594 [libgo_cv_c_fancymath=no])
595 CFLAGS=$CFLAGS_hold])
597 if test "$libgo_cv_c_fancymath" = yes; then
598 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
603 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
604 AC_CHECK_TYPES([off64_t])
607 dnl Work out the size of the epoll_events struct on GNU/Linux.
608 AC_CACHE_CHECK([epoll_event size],
609 [libgo_cv_c_epoll_event_size],
610 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
611 [sizeof (struct epoll_event)],
612 [#include <sys/epoll.h>],
613 [libgo_cv_c_epoll_event_size=0])])
614 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
615 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
617 dnl Work out the offset of the fd field in the epoll_events struct on
619 AC_CACHE_CHECK([epoll_event data.fd offset],
620 [libgo_cv_c_epoll_event_fd_offset],
621 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
622 [offsetof (struct epoll_event, data.fd)],
624 #include <sys/epoll.h>],
625 [libgo_cv_c_epoll_event_fd_offset=0])])
626 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
627 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
629 dnl See if struct exception is defined in <math.h>.
630 AC_CHECK_TYPE([struct exception],
631 [libgo_has_struct_exception=yes],
632 [libgo_has_struct_exception=no],
634 if test "$libgo_has_struct_exception" = "yes"; then
635 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
636 [Define to 1 if <math.h> defines struct exception])
639 dnl Check if makecontext expects the uc_stack member of ucontext to point
640 dnl to the top of the stack.
642 sparc*-*-solaris2.[[89]]*)
643 libgo_cv_lib_makecontext_stack_top=yes
646 libgo_cv_lib_makecontext_stack_top=no
649 if test "$libgo_cv_lib_makecontext_stack_top" = "yes"; then
650 AC_DEFINE(MAKECONTEXT_STACK_TOP, 1,
651 [Define if makecontext expects top of stack in uc_stack.])
654 dnl See whether setcontext changes the value of TLS variables.
655 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
656 [libgo_cv_lib_setcontext_clobbers_tls],
657 [CFLAGS_hold="$CFLAGS"
658 CFLAGS="$PTHREAD_CFLAGS"
660 LIBS="$LIBS $PTHREAD_LIBS"
661 AC_CHECK_SIZEOF([void *])
662 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
667 #include <ucontext.h>
672 static char stack[[10 * 1024 * 1024]];
675 /* Called via makecontext/setcontext. */
683 /* Called via pthread_create. */
688 /* The thread should still see this value after calling
694 /* The call to setcontext should not return. */
703 /* The thread should not see this value. */
706 if (getcontext (&c) < 0)
709 c.uc_stack.ss_sp = stack;
710 #ifdef MAKECONTEXT_STACK_TOP
711 c.uc_stack.ss_sp += sizeof stack;
713 c.uc_stack.ss_flags = 0;
714 c.uc_stack.ss_size = sizeof stack;
716 makecontext (&c, cfn, 0);
718 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
721 if (pthread_join (tid, NULL) != 0)
724 /* The thread should have called exit. */
728 [libgo_cv_lib_setcontext_clobbers_tls=no],
729 [libgo_cv_lib_setcontext_clobbers_tls=yes],
730 [case "$target:$ptr_type_size" in
731 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
732 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
734 libgo_cv_lib_setcontext_clobbers_tls=no ;;
737 CFLAGS="$CFLAGS_hold"
740 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
741 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
742 [Define if setcontext clobbers TLS variables])
747 if test ${multilib} = yes; then
748 multilib_arg="--enable-multilib"
753 AC_CONFIG_FILES(Makefile testsuite/Makefile)
755 AC_CONFIG_COMMANDS([default],
756 [if test -n "$CONFIG_FILES"; then
757 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
758 # that multilib installs will end up installed in the correct place.
759 # The testsuite needs it for multilib-aware ABI baseline files.
760 # To work around this not being passed down from config-ml.in ->
761 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
762 # append it here. Only modify Makefiles that have just been created.
764 # Also, get rid of this simulated-VPATH thing that automake does.
766 s!`test -f '$<' || echo '$(srcdir)/'`!!
768 for i in $SUBDIRS; do
769 case $CONFIG_FILES in
771 #echo "Adding MULTISUBDIR to $i/Makefile"
772 sed -f vpsed $i/Makefile > tmp
773 grep '^MULTISUBDIR =' Makefile >> tmp
782 # Variables needed in config.status (file generation) which aren't already
783 # passed by autoconf.