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=${CC_FOR_BUILD:-gcc}
46 AC_SUBST(CC_FOR_BUILD)
50 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
53 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
54 [turns on -Werror @<:@default=yes@:>@])])
55 if test "x$enable_werror" != "xno"; then
61 glibgo_toolexeclibdir=no
63 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
64 AC_ARG_ENABLE([version-specific-runtime-libs],
65 AC_HELP_STRING([--enable-version-specific-runtime-libs],
66 [Specify that runtime libraries should be installed in a compiler-specific directory]),
68 yes) version_specific_libs=yes ;;
69 no) version_specific_libs=no ;;
70 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
72 [version_specific_libs=no])
73 AC_MSG_RESULT($version_specific_libs)
75 # Version-specific runtime libs processing.
76 if test $version_specific_libs = yes; then
77 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
78 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
81 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
82 # Install a library built with a cross compiler in tooldir, not libdir.
83 if test -n "$with_cross_host" &&
84 test x"$with_cross_host" != x"no"; then
85 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
86 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
88 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
89 nover_glibgo_toolexeclibdir='${libdir}'
91 multi_os_directory=`$CC -print-multi-os-directory`
92 case $multi_os_directory in
93 .) ;; # Avoid trailing /.
94 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
97 if test x"$glibgo_toolexecdir" = x"no"; then
98 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
99 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
102 AC_SUBST(glibgo_toolexecdir)
103 AC_SUBST(glibgo_toolexeclibdir)
104 AC_SUBST(nover_glibgo_toolexeclibdir)
106 # See if the user wants to configure without libffi. Some
107 # architectures don't support it. FIXME: We should set a default
110 AS_HELP_STRING([--without-libffi],
113 [with_libffi=${with_libffi_default-yes}])
117 if test "$with_libffi" != no; then
118 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
119 LIBFFI=../libffi/libffi_convenience.la
120 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
125 # Used to tell GNU make to include a file without telling automake to
127 go_include="-include"
141 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
142 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
143 *-*-irix6*) is_irix=yes; GOOS=irix ;;
144 *-*-linux*) is_linux=yes; GOOS=linux ;;
145 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
146 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
147 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
148 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
149 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
151 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
152 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
153 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
154 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
155 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
156 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
157 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
158 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
159 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
162 dnl Test whether we need to use DejaGNU or whether we can use the
163 dnl simpler gotest approach. We can only use gotest for a native
167 *-*-rtems*) USE_DEJAGNU=yes ;;
169 *) USE_DEJAGNU=yes ;;
171 AC_SUBST(USE_DEJAGNU)
173 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
195 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
200 i[34567]86-*-* | x86_64-*-*)
206 [is_386=yes], [is_x86_64=yes])
207 if test "$is_386" = "yes"; then
219 #if _MIPS_SIM != _ABIO32
224 #if _MIPS_SIM != _ABIN32
229 #if _MIPS_SIM != _ABI64
234 #if _MIPS_SIM != _ABIO64
238 [AC_MSG_ERROR([unknown MIPS ABI])
239 [mips_abi="n32"]])])])])
241 "o32") GOARCH=mipso32 ;;
242 "n32") GOARCH=mipsn32 ;;
243 "n64") GOARCH=mipsn64 ;;
244 "o64") GOARCH=mipso64 ;;
247 rs6000*-*-* | powerpc*-*-*)
252 [is_ppc=yes], [is_ppc64=yes])
253 if test "$is_ppc" = "yes"; then
261 #if defined(__sparcv9) || defined(__arch64__)
264 [is_sparc=yes], [is_sparc64=yes])
265 if test "$is_sparc" = "yes"; then
272 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
273 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
274 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
275 AM_CONDITIONAL(LIBGO_IS_ARM64, test $is_arm64 = yes)
276 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
277 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
278 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
279 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
280 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
281 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
282 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
283 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
284 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
285 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
286 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
289 dnl Some files are only present when needed for specific architectures.
291 GO_LIBCALL_OS_ARCH_FILE=
293 GO_SYSCALL_OS_ARCH_FILE=
294 if test -f ${srcdir}/go/syscall/libcall_${GOOS}.go; then
295 GO_LIBCALL_OS_FILE=go/syscall/libcall_${GOOS}.go
297 if test -f ${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go; then
298 GO_LIBCALL_OS_ARCH_FILE=go/syscall/libcall_${GOOS}_${GOARCH}.go
300 if test -f ${srcdir}/go/syscall/syscall_${GOOS}.go; then
301 GO_SYSCALL_OS_FILE=go/syscall/syscall_${GOOS}.go
303 if test -f ${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go; then
304 GO_SYSCALL_OS_ARCH_FILE=go/syscall/syscall_${GOOS}_${GOARCH}.go
306 AC_SUBST(GO_LIBCALL_OS_FILE)
307 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
308 AC_SUBST(GO_SYSCALL_OS_FILE)
309 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
311 dnl Special flags used to generate sysinfo.go.
312 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
315 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
316 # msghdr in <sys/socket.h>.
317 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
320 # Solaris 8/9 need this so struct msghdr gets the msg_control
321 # etc. fields in <sys/socket.h> (_XPG4_2).
322 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__"
324 *-*-solaris2.1[[01]])
325 # Solaris 10+ needs this so struct msghdr gets the msg_control
326 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
327 # above doesn't work with C99.
328 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
333 dnl Use -fsplit-stack when compiling C code if available.
334 AC_CACHE_CHECK([whether -fsplit-stack is supported],
335 [libgo_cv_c_split_stack_supported],
337 CFLAGS="$CFLAGS -fsplit-stack"
338 AC_COMPILE_IFELSE([[int i;]],
339 [libgo_cv_c_split_stack_supported=yes],
340 [libgo_cv_c_split_stack_supported=no])
341 CFLAGS=$CFLAGS_hold])
342 if test "$libgo_cv_c_split_stack_supported" = yes; then
343 SPLIT_STACK=-fsplit-stack
344 AC_DEFINE(USING_SPLIT_STACK, 1,
345 [Define if the compiler supports -fsplit-stack])
349 AC_SUBST(SPLIT_STACK)
350 AM_CONDITIONAL(USING_SPLIT_STACK,
351 test "$libgo_cv_c_split_stack_supported" = yes)
353 dnl Check whether the linker does stack munging when calling from
354 dnl split-stack into non-split-stack code. We check this by looking
355 dnl at the --help output. FIXME: This is only half right: it's
356 dnl possible for the linker to support this for some targets but not
358 AC_CACHE_CHECK([whether linker supports split stack],
359 [libgo_cv_c_linker_supports_split_stack],
360 [libgo_cv_c_linker_supports_split_stack=no
361 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
362 libgo_cv_c_linker_supports_split_stack=yes
364 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
365 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
366 [Define if the linker support split stack adjustments])
369 dnl Test for the -lm library.
371 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
374 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
375 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
376 [libgo_cv_lib_sockets=
378 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
379 if test "$libgo_check_socket" = "yes"; then
380 unset ac_cv_func_connect
381 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
382 libgo_check_both=yes)
384 if test "$libgo_check_both" = "yes"; then
386 LIBS="$LIBS -lsocket -lnsl"
387 unset ac_cv_func_accept
388 AC_CHECK_FUNC(accept,
390 libgo_cv_lib_sockets="-lsocket -lnsl"])
391 unset ac_cv_func_accept
394 unset ac_cv_func_gethostbyname
395 libgo_old_libs="$LIBS"
396 AC_CHECK_FUNC(gethostbyname, ,
397 [AC_CHECK_LIB(nsl, main,
398 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
399 unset ac_cv_func_gethostbyname
402 NET_LIBS="$libgo_cv_lib_sockets"
405 dnl Test whether the compiler supports the -pthread option.
406 AC_CACHE_CHECK([whether -pthread is supported],
407 [libgo_cv_lib_pthread],
409 CFLAGS="$CFLAGS -pthread"
410 AC_COMPILE_IFELSE([[int i;]],
411 [libgo_cv_lib_pthread=yes],
412 [libgo_cv_lib_pthread=no])
413 CFLAGS=$CFLAGS_hold])
415 if test "$libgo_cv_lib_pthread" = yes; then
416 PTHREAD_CFLAGS=-pthread
418 AC_SUBST(PTHREAD_CFLAGS)
420 dnl Test for the -lpthread library.
422 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
423 AC_SUBST(PTHREAD_LIBS)
425 dnl Test if -lrt is required for sched_yield and/or nanosleep.
426 AC_SEARCH_LIBS([sched_yield], [rt])
427 AC_SEARCH_LIBS([nanosleep], [rt])
431 GCC_CHECK_UNWIND_GETIPINFO
433 AC_ARG_ENABLE(sjlj-exceptions,
434 AC_HELP_STRING([--enable-sjlj-exceptions],
435 [force use of builtin_setjmp for exceptions]),
436 [case "$enableval" in
438 *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
440 [enable_sjlj_exceptions=auto])
442 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
443 [libgo_cv_lib_sjlj_exceptions],
450 int i __attribute__ ((cleanup (clean)));
455 CFLAGS="--save-temps -fexceptions"
456 libgo_cv_lib_sjlj_exceptions=unknown
457 AS_IF([ac_fn_c_try_compile],
458 [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
459 libgo_cv_lib_sjlj_exceptions=yes
460 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
461 libgo_cv_lib_sjlj_exceptions=no
467 if test "$enable_sjlj_exceptions" = "auto"; then
468 enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
471 case $enable_sjlj_exceptions in
473 AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
474 [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
479 AC_MSG_ERROR([unable to detect exception model])
483 AC_CHECK_HEADERS(sys/file.h sys/mman.h syscall.h sys/epoll.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/reboot.h netinet/icmp6.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
485 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
486 [#ifdef HAVE_SYS_SOCKET_H
487 #include <sys/socket.h>
491 AC_CACHE_CHECK([whether <ustat.h> can be used],
492 [libgo_cv_c_ustat_h],
494 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
497 #include <sys/types.h>
498 #ifdef HAVE_LINUX_FILTER_H
499 #include <linux/filter.h>
502 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
503 CFLAGS=$CFLAGS_hold])
504 if test $libgo_cv_c_ustat_h = yes; then
505 AC_DEFINE(HAVE_USTAT_H, 1,
506 [Define to 1 if you have the <ustat.h> header file and it works.])
509 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
511 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv dl_iterate_phdr)
512 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
513 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
515 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice tee unlinkat unshare utimensat)
517 AC_CHECK_TYPES([loff_t])
521 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
524 CFLAGS_hold="$CFLAGS"
525 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
527 LIBS="$LIBS $PTHREAD_LIBS"
528 AC_CHECK_FUNCS(sem_timedwait)
529 CFLAGS="$CFLAGS_hold"
533 LIBS="$LIBS $MATH_LIBS"
534 AC_CHECK_FUNCS(matherr)
537 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
538 [libgo_cv_func___sync_bool_compare_and_swap_4],
540 typedef unsigned int uint32 __attribute__ ((mode (SI)));
542 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
544 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
545 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
546 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
547 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
548 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
551 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
552 [libgo_cv_func___sync_bool_compare_and_swap_8],
554 typedef unsigned int uint64 __attribute__ ((mode (DI)));
556 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
558 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
559 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
560 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
561 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
562 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
565 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
566 [libgo_cv_func___sync_fetch_and_add_4],
568 typedef unsigned int uint32 __attribute__ ((mode (SI)));
570 int main() { return __sync_fetch_and_add (&i, 1); }
572 [libgo_cv_func___sync_fetch_and_add_4=yes],
573 [libgo_cv_func___sync_fetch_and_add_4=no])])
574 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
575 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
576 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
579 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
580 [libgo_cv_func___sync_add_and_fetch_8],
582 typedef unsigned int uint64 __attribute__ ((mode (DI)));
584 int main() { return __sync_add_and_fetch (&i, 1); }
586 [libgo_cv_func___sync_add_and_fetch_8=yes],
587 [libgo_cv_func___sync_add_and_fetch_8=no])])
588 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
589 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
590 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
593 dnl For x86 we want to use the -minline-all-stringops option to avoid
594 dnl forcing a stack split when calling memcpy and friends.
595 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
596 [libgo_cv_c_stringops],
598 CFLAGS="$CFLAGS -minline-all-stringops"
599 AC_COMPILE_IFELSE([int i;],
600 [libgo_cv_c_stringops=yes],
601 [libgo_cv_c_stringops=no])
602 CFLAGS=$CFLAGS_hold])
604 if test "$libgo_cv_c_stringops" = yes; then
605 STRINGOPS_FLAG=-minline-all-stringops
607 AC_SUBST(STRINGOPS_FLAG)
609 dnl For x86 we want to compile the math library with -mfancy-math-387
610 dnl -funsafe-math-optimizations so that we can use the builtin
611 dnl instructions directly.
612 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
613 [libgo_cv_c_fancymath],
615 CFLAGS="$CFLAGS -mfancy-math-387"
616 AC_COMPILE_IFELSE([int i;],
617 [libgo_cv_c_fancymath=yes],
618 [libgo_cv_c_fancymath=no])
619 CFLAGS=$CFLAGS_hold])
621 if test "$libgo_cv_c_fancymath" = yes; then
622 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
624 MATH_FLAG="-ffp-contract=off"
629 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
630 AC_CHECK_TYPES([off64_t])
633 dnl Work out the size of the epoll_events struct on GNU/Linux.
634 AC_CACHE_CHECK([epoll_event size],
635 [libgo_cv_c_epoll_event_size],
636 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
637 [sizeof (struct epoll_event)],
638 [#include <sys/epoll.h>],
639 [libgo_cv_c_epoll_event_size=0])])
640 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
641 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
643 dnl Work out the offset of the fd field in the epoll_events struct on
645 AC_CACHE_CHECK([epoll_event data.fd offset],
646 [libgo_cv_c_epoll_event_fd_offset],
647 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
648 [offsetof (struct epoll_event, data.fd)],
650 #include <sys/epoll.h>],
651 [libgo_cv_c_epoll_event_fd_offset=0])])
652 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
653 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
655 dnl See if struct exception is defined in <math.h>.
656 AC_CHECK_TYPE([struct exception],
657 [libgo_has_struct_exception=yes],
658 [libgo_has_struct_exception=no],
660 if test "$libgo_has_struct_exception" = "yes"; then
661 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
662 [Define to 1 if <math.h> defines struct exception])
665 dnl Check if makecontext expects the uc_stack member of ucontext to point
666 dnl to the top of the stack.
668 sparc*-*-solaris2.[[89]]*)
669 libgo_cv_lib_makecontext_stack_top=yes
672 libgo_cv_lib_makecontext_stack_top=no
675 if test "$libgo_cv_lib_makecontext_stack_top" = "yes"; then
676 AC_DEFINE(MAKECONTEXT_STACK_TOP, 1,
677 [Define if makecontext expects top of stack in uc_stack.])
680 dnl See whether setcontext changes the value of TLS variables.
681 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
682 [libgo_cv_lib_setcontext_clobbers_tls],
683 [CFLAGS_hold="$CFLAGS"
684 CFLAGS="$PTHREAD_CFLAGS"
686 LIBS="$LIBS $PTHREAD_LIBS"
687 AC_CHECK_SIZEOF([void *])
688 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
693 #include <ucontext.h>
698 static char stack[[10 * 1024 * 1024]];
701 /* Called via makecontext/setcontext. */
709 /* Called via pthread_create. */
714 /* The thread should still see this value after calling
720 /* The call to setcontext should not return. */
729 /* The thread should not see this value. */
732 if (getcontext (&c) < 0)
735 c.uc_stack.ss_sp = stack;
736 #ifdef MAKECONTEXT_STACK_TOP
737 c.uc_stack.ss_sp += sizeof stack;
739 c.uc_stack.ss_flags = 0;
740 c.uc_stack.ss_size = sizeof stack;
742 makecontext (&c, cfn, 0);
744 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
747 if (pthread_join (tid, NULL) != 0)
750 /* The thread should have called exit. */
754 [libgo_cv_lib_setcontext_clobbers_tls=no],
755 [libgo_cv_lib_setcontext_clobbers_tls=yes],
756 [case "$target:$ptr_type_size" in
757 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
758 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
760 libgo_cv_lib_setcontext_clobbers_tls=no ;;
763 CFLAGS="$CFLAGS_hold"
766 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
767 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
768 [Define if setcontext clobbers TLS variables])
771 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
772 libgo_cv_ro_eh_frame, [
773 libgo_cv_ro_eh_frame=no
774 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
775 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
776 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
777 libgo_cv_ro_eh_frame=yes
778 elif grep '.section.*eh_frame.*#alloc' conftest.c \
779 | grep -v '#write' > /dev/null; then
780 libgo_cv_ro_eh_frame=yes
785 if test "x$libgo_cv_ro_eh_frame" = xyes; then
786 AC_DEFINE(EH_FRAME_FLAGS, "a",
787 [Define to the flags needed for the .section .eh_frame directive.])
789 AC_DEFINE(EH_FRAME_FLAGS, "aw",
790 [Define to the flags needed for the .section .eh_frame directive.])
793 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
794 libgo_cv_as_comdat_gnu, [
795 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
796 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
797 libgo_cv_as_comdat_gnu=yes
799 libgo_cv_as_comdat_gnu=no
802 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
803 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
804 [Define if your assembler supports GNU comdat group syntax.])
807 AC_CACHE_CHECK([assembler supports pc related relocs],
808 libgo_cv_as_x86_pcrel, [
809 libgo_cv_as_x86_pcrel=yes
810 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
811 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
812 libgo_cv_as_x86_pcrel=no
815 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
816 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
817 [Define if your assembler supports PC relative relocs.])
820 AC_CACHE_CHECK([assembler supports unwind section type],
821 libgo_cv_as_x86_64_unwind_section_type, [
822 libgo_cv_as_x86_64_unwind_section_type=yes
823 echo '.section .eh_frame,"a",@unwind' > conftest.s
824 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
825 libgo_cv_as_x86_64_unwind_section_type=no
828 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
829 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
830 [Define if your assembler supports unwind section type.])
835 if test ${multilib} = yes; then
836 multilib_arg="--enable-multilib"
841 AC_CONFIG_FILES(Makefile testsuite/Makefile)
843 AC_CONFIG_COMMANDS([default],
844 [if test -n "$CONFIG_FILES"; then
845 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
846 # that multilib installs will end up installed in the correct place.
847 # The testsuite needs it for multilib-aware ABI baseline files.
848 # To work around this not being passed down from config-ml.in ->
849 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
850 # append it here. Only modify Makefiles that have just been created.
852 # Also, get rid of this simulated-VPATH thing that automake does.
854 s!`test -f '$<' || echo '$(srcdir)/'`!!
856 for i in $SUBDIRS; do
857 case $CONFIG_FILES in
859 #echo "Adding MULTISUBDIR to $i/Makefile"
860 sed -f vpsed $i/Makefile > tmp
861 grep '^MULTISUBDIR =' Makefile >> tmp
870 # Variables needed in config.status (file generation) which aren't already
871 # passed by autoconf.