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)
14 libtool_VERSION=10:0:0
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=`$GOC -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$(top_srcdir)/../libffi/include -I../libffi/include'
125 # See if the user wants to configure without libatomic. This is useful if we are
126 # on an architecture for which libgo does not need an atomic support library and
127 # libatomic does not support our C compiler.
128 AC_ARG_WITH(libatomic,
129 AS_HELP_STRING([--without-libatomic],
130 [don't use libatomic]),
132 [with_libatomic=${with_libatomic_default-yes}])
135 if test "$with_libatomic" != no; then
136 LIBATOMIC=../libatomic/libatomic_convenience.la
140 # Used to tell GNU make to include a file without telling automake to
142 go_include="-include"
145 # All known GOOS values. This is the union of all operating systems
146 # supported by the gofrontend and all operating systems supported by
148 ALLGOOS="android darwin dragonfly freebsd irix linux netbsd openbsd plan9 rtems solaris windows"
161 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
162 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
163 *-*-irix6*) is_irix=yes; GOOS=irix ;;
164 *-*-linux*) is_linux=yes; GOOS=linux ;;
165 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
166 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
167 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
168 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
169 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
171 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
172 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
173 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
174 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
175 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
176 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
177 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
178 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
179 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
180 AM_CONDITIONAL(LIBGO_IS_BSD, test $is_darwin = yes -o $is_dragonfly = yes -o $is_freebsd = yes -o $is_netbsd = yes -o $is_openbsd = yes)
184 dnl Test whether we need to use DejaGNU or whether we can use the
185 dnl simpler gotest approach. We can only use gotest for a native
189 *-*-rtems*) USE_DEJAGNU=yes ;;
191 *) USE_DEJAGNU=yes ;;
193 AC_SUBST(USE_DEJAGNU)
195 # All known GOARCH values. This is the union of all architectures
196 # supported by the gofrontend and all architectures supported by the
198 # N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
199 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mipso32 mipsn32 mipso64 mipsn64 mips mipsle mips64 mips64le mips64p32 mips64pe32le ppc ppc64 ppc64le s390 s390x sparc sparc64"
201 # All known GOARCH_FAMILY values.
202 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 S390 S390X SPARC SPARC64"
205 GOARCH_FAMILY=unknown
207 GOARCH_CACHELINESIZE=64
208 GOARCH_PHYSPAGESIZE=4096
211 GOARCH_HUGEPAGESIZE=0
212 GOARCH_MINFRAMESIZE=0
217 GOARCH_PHYSPAGESIZE=8192
223 GOARCH_CACHELINESIZE=32
224 GOARCH_PHYSPAGESIZE=65536
226 GOARCH_MINFRAMESIZE=8
228 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
231 GOARCH_CACHELINESIZE=32
234 GOARCH_MINFRAMESIZE=4
237 i[34567]86-*-* | x86_64-*-*)
246 GOARCH_HUGEPAGESIZE="1 << 21"
250 GOARCH_HUGEPAGESIZE="1 << 21"
256 GOARCH_CACHELINESIZE=16384
257 GOARCH_PHYSPAGESIZE=8192
263 GOARCH_CACHELINESIZE=16
269 #if _MIPS_SIM != _ABIO32
274 #if _MIPS_SIM != _ABIN32
279 #if _MIPS_SIM != _ABI64
284 #if _MIPS_SIM != _ABIO64
288 [AC_MSG_ERROR([unknown MIPS ABI])
289 [mips_abi="n32"]])])])])
291 "o32") GOARCH=mipso32 ;;
292 "n32") GOARCH=mipsn32 ;;
293 "n64") GOARCH=mipsn64 ;;
294 "o64") GOARCH=mipso64 ;;
300 GOARCH_MINFRAMESIZE=4
304 GOARCH_MINFRAMESIZE=8
314 GOARCH_CACHELINESIZE=32
315 GOARCH_PHYSPAGESIZE=16384
318 rs6000*-*-* | powerpc*-*-*)
331 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
339 GOARCH_PHYSPAGESIZE=65536
341 GOARCH_MINFRAMESIZE=32
345 #if defined(__s390x__)
351 GOARCH_MINFRAMESIZE=4
354 GOARCH_MINFRAMESIZE=8
357 GOARCH_CACHELINESIZE=256
362 #if defined(__sparcv9) || defined(__arch64__)
370 GOARCH_FAMILY=SPARC64
373 GOARCH_PHYSPAGESIZE=8192
378 AC_SUBST(GOARCH_FAMILY)
379 AC_SUBST(GOARCH_BIGENDIAN)
380 AC_SUBST(GOARCH_CACHELINESIZE)
381 AC_SUBST(GOARCH_PHYSPAGESIZE)
382 AC_SUBST(GOARCH_PCQUANTUM)
383 AC_SUBST(GOARCH_INT64ALIGN)
384 AC_SUBST(GOARCH_HUGEPAGESIZE)
385 AC_SUBST(GOARCH_MINFRAMESIZE)
387 AC_SUBST(ALLGOARCHFAMILY)
389 dnl Some files are only present when needed for specific architectures.
391 GO_LIBCALL_OS_ARCH_FILE=
393 GO_SYSCALL_OS_ARCH_FILE=
394 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
395 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
397 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
398 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
400 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
401 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
403 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
404 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
406 AC_SUBST(GO_LIBCALL_OS_FILE)
407 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
408 AC_SUBST(GO_SYSCALL_OS_FILE)
409 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
411 dnl Special flags used to generate sysinfo.go.
412 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
415 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
416 # msghdr in <sys/socket.h>.
417 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
419 *-*-solaris2.1[[01]])
420 # Solaris 10+ needs this so struct msghdr gets the msg_control
421 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
422 # above doesn't work with C99.
423 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
428 dnl Use -fsplit-stack when compiling C code if available.
429 AC_CACHE_CHECK([whether -fsplit-stack is supported],
430 [libgo_cv_c_split_stack_supported],
432 CFLAGS="$CFLAGS -fsplit-stack"
433 AC_COMPILE_IFELSE([[int i;]],
434 [libgo_cv_c_split_stack_supported=yes],
435 [libgo_cv_c_split_stack_supported=no])
436 CFLAGS=$CFLAGS_hold])
438 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
439 dnl reject split-stack code calling non-split-stack code on targets
440 dnl they don't support.
441 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
442 [libgo_cv_c_linker_split_non_split],
443 [cat > conftest1.c << EOF
445 int main() { f(); return 0; }
447 cat > conftest2.c << EOF
450 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c
451 $CC -c $CFLAGS $CPPFLAGS conftest2.c
452 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext; then
453 libgo_cv_c_linker_split_non_split=yes
455 libgo_cv_c_linker_split_non_split=no
457 rm -f conftest1.* conftest2.* conftest])
459 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
460 SPLIT_STACK=-fsplit-stack
461 AC_DEFINE(USING_SPLIT_STACK, 1,
462 [Define if the compiler supports -fsplit-stack])
466 AC_SUBST(SPLIT_STACK)
467 AM_CONDITIONAL(USING_SPLIT_STACK,
468 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
470 dnl If the compiler supports split-stack but the linker does not, then
471 dnl we need to explicitly disable split-stack for Go.
472 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
473 GO_SPLIT_STACK=-fno-split-stack
477 AC_SUBST(GO_SPLIT_STACK)
479 dnl Check whether the linker does stack munging when calling from
480 dnl split-stack into non-split-stack code. We check this by looking
481 dnl at the --help output. FIXME: This is only half right: it's
482 dnl possible for the linker to support this for some targets but not
484 dnl This is slightly different from the above check, which is whether
485 dnl the linker permits the call at all.
486 AC_CACHE_CHECK([whether linker supports split stack],
487 [libgo_cv_c_linker_supports_split_stack],
488 [libgo_cv_c_linker_supports_split_stack=no
489 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
490 libgo_cv_c_linker_supports_split_stack=yes
492 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
493 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
494 [Define if the linker support split stack adjustments])
497 AC_CACHE_CHECK([whether compiler is llgo],
498 [libgo_cv_c_goc_is_llgo],
499 [libgo_cv_c_goc_is_llgo=no
500 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
501 libgo_cv_c_goc_is_llgo=yes
503 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
505 dnl Test for the -lm library.
507 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
510 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
511 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
512 [libgo_cv_lib_sockets=
514 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
515 if test "$libgo_check_socket" = "yes"; then
516 unset ac_cv_func_connect
517 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
518 libgo_check_both=yes)
520 if test "$libgo_check_both" = "yes"; then
522 LIBS="$LIBS -lsocket -lnsl"
523 unset ac_cv_func_accept
524 AC_CHECK_FUNC(accept,
526 libgo_cv_lib_sockets="-lsocket -lnsl"])
527 unset ac_cv_func_accept
530 unset ac_cv_func_gethostbyname
531 libgo_old_libs="$LIBS"
532 AC_CHECK_FUNC(gethostbyname, ,
533 [AC_CHECK_LIB(nsl, main,
534 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
535 unset ac_cv_func_gethostbyname
536 AC_CHECK_FUNC(sendfile, ,
537 [AC_CHECK_LIB(sendfile, main,
538 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
541 NET_LIBS="$libgo_cv_lib_sockets"
544 dnl Test whether the compiler supports the -pthread option.
545 AC_CACHE_CHECK([whether -pthread is supported],
546 [libgo_cv_lib_pthread],
548 CFLAGS="$CFLAGS -pthread"
549 AC_COMPILE_IFELSE([[int i;]],
550 [libgo_cv_lib_pthread=yes],
551 [libgo_cv_lib_pthread=no])
552 CFLAGS=$CFLAGS_hold])
554 if test "$libgo_cv_lib_pthread" = yes; then
555 PTHREAD_CFLAGS=-pthread
557 AC_SUBST(PTHREAD_CFLAGS)
559 dnl Test for the -lpthread library.
561 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
562 AC_SUBST(PTHREAD_LIBS)
564 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
565 AC_SEARCH_LIBS([sched_yield], [rt])
566 AC_SEARCH_LIBS([nanosleep], [rt])
567 AC_SEARCH_LIBS([clock_gettime], [rt])
571 GCC_CHECK_UNWIND_GETIPINFO
573 AC_CHECK_HEADERS(sched.h 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)
575 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
576 [#ifdef HAVE_SYS_SOCKET_H
577 #include <sys/socket.h>
581 AC_CACHE_CHECK([whether <ustat.h> can be used],
582 [libgo_cv_c_ustat_h],
584 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
587 #include <sys/types.h>
588 #ifdef HAVE_LINUX_FILTER_H
589 #include <linux/filter.h>
592 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
593 CFLAGS=$CFLAGS_hold])
594 if test $libgo_cv_c_ustat_h = yes; then
595 AC_DEFINE(HAVE_USTAT_H, 1,
596 [Define to 1 if you have the <ustat.h> header file and it works.])
599 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
601 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
602 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
603 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
605 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)
607 AC_CHECK_TYPES([loff_t])
611 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
614 CFLAGS_hold="$CFLAGS"
615 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
617 LIBS="$LIBS $PTHREAD_LIBS"
618 AC_CHECK_FUNCS(sem_timedwait)
619 CFLAGS="$CFLAGS_hold"
623 LIBS="$LIBS $MATH_LIBS"
624 AC_CHECK_FUNCS(matherr)
627 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
628 [libgo_cv_func___sync_bool_compare_and_swap_4],
630 typedef unsigned int uint32 __attribute__ ((mode (SI)));
632 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
634 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
635 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
636 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
637 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
638 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
641 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
642 [libgo_cv_func___sync_bool_compare_and_swap_8],
644 typedef unsigned int uint64 __attribute__ ((mode (DI)));
646 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
648 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
649 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
650 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
651 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
652 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
655 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
656 [libgo_cv_func___sync_fetch_and_add_4],
658 typedef unsigned int uint32 __attribute__ ((mode (SI)));
660 int main() { return __sync_fetch_and_add (&i, 1); }
662 [libgo_cv_func___sync_fetch_and_add_4=yes],
663 [libgo_cv_func___sync_fetch_and_add_4=no])])
664 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
665 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
666 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
669 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
670 [libgo_cv_func___sync_add_and_fetch_8],
672 typedef unsigned int uint64 __attribute__ ((mode (DI)));
674 int main() { return __sync_add_and_fetch (&i, 1); }
676 [libgo_cv_func___sync_add_and_fetch_8=yes],
677 [libgo_cv_func___sync_add_and_fetch_8=no])])
678 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
679 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
680 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
683 dnl For x86 we want to use the -minline-all-stringops option to avoid
684 dnl forcing a stack split when calling memcpy and friends.
685 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
686 [libgo_cv_c_stringops],
688 CFLAGS="$CFLAGS -minline-all-stringops"
689 AC_COMPILE_IFELSE([int i;],
690 [libgo_cv_c_stringops=yes],
691 [libgo_cv_c_stringops=no])
692 CFLAGS=$CFLAGS_hold])
694 if test "$libgo_cv_c_stringops" = yes; then
695 STRINGOPS_FLAG=-minline-all-stringops
697 AC_SUBST(STRINGOPS_FLAG)
699 dnl For x86 we want to compile the math library with -mfancy-math-387
700 dnl -funsafe-math-optimizations so that we can use the builtin
701 dnl instructions directly.
702 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
703 [libgo_cv_c_fancymath],
705 CFLAGS="$CFLAGS -mfancy-math-387"
706 AC_COMPILE_IFELSE([int i;],
707 [libgo_cv_c_fancymath=yes],
708 [libgo_cv_c_fancymath=no])
709 CFLAGS=$CFLAGS_hold])
711 if test "$libgo_cv_c_fancymath" = yes; then
712 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
714 MATH_FLAG="-ffp-contract=off"
719 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
720 AC_CHECK_TYPES([off64_t])
723 dnl Work out the size of the epoll_events struct on GNU/Linux.
724 AC_CACHE_CHECK([epoll_event size],
725 [libgo_cv_c_epoll_event_size],
726 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
727 [sizeof (struct epoll_event)],
728 [#include <sys/epoll.h>],
729 [libgo_cv_c_epoll_event_size=0])])
730 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
731 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
733 dnl Work out the offset of the fd field in the epoll_events struct on
735 AC_CACHE_CHECK([epoll_event data.fd offset],
736 [libgo_cv_c_epoll_event_fd_offset],
737 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
738 [offsetof (struct epoll_event, data.fd)],
740 #include <sys/epoll.h>],
741 [libgo_cv_c_epoll_event_fd_offset=0])])
742 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
743 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
745 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
746 dnl in Solaris 12 for XPG7 compatibility.
747 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
748 [have_stat_timespec=yes], [have_stat_timespec=no])
749 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
751 dnl See if struct exception is defined in <math.h>.
752 AC_CHECK_TYPE([struct exception],
753 [libgo_has_struct_exception=yes],
754 [libgo_has_struct_exception=no],
756 if test "$libgo_has_struct_exception" = "yes"; then
757 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
758 [Define to 1 if <math.h> defines struct exception])
761 dnl See whether setcontext changes the value of TLS variables.
762 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
763 [libgo_cv_lib_setcontext_clobbers_tls],
764 [CFLAGS_hold="$CFLAGS"
765 CFLAGS="$PTHREAD_CFLAGS"
767 LIBS="$LIBS $PTHREAD_LIBS"
768 AC_CHECK_SIZEOF([void *])
769 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
774 #include <ucontext.h>
779 static char stack[[10 * 1024 * 1024]];
782 /* Called via makecontext/setcontext. */
790 /* Called via pthread_create. */
795 /* The thread should still see this value after calling
801 /* The call to setcontext should not return. */
810 /* The thread should not see this value. */
813 if (getcontext (&c) < 0)
816 c.uc_stack.ss_sp = stack;
817 #ifdef MAKECONTEXT_STACK_TOP
818 c.uc_stack.ss_sp += sizeof stack;
820 c.uc_stack.ss_flags = 0;
821 c.uc_stack.ss_size = sizeof stack;
823 makecontext (&c, cfn, 0);
825 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
828 if (pthread_join (tid, NULL) != 0)
831 /* The thread should have called exit. */
835 [libgo_cv_lib_setcontext_clobbers_tls=no],
836 [libgo_cv_lib_setcontext_clobbers_tls=yes],
837 [case "$target:$ptr_type_size" in
838 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
839 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
841 libgo_cv_lib_setcontext_clobbers_tls=no ;;
844 CFLAGS="$CFLAGS_hold"
847 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
848 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
849 [Define if setcontext clobbers TLS variables])
852 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
853 libgo_cv_ro_eh_frame, [
854 libgo_cv_ro_eh_frame=no
855 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
856 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
857 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
858 libgo_cv_ro_eh_frame=yes
859 elif grep '.section.*eh_frame.*#alloc' conftest.c \
860 | grep -v '#write' > /dev/null; then
861 libgo_cv_ro_eh_frame=yes
866 if test "x$libgo_cv_ro_eh_frame" = xyes; then
867 AC_DEFINE(EH_FRAME_FLAGS, "a",
868 [Define to the flags needed for the .section .eh_frame directive.])
870 AC_DEFINE(EH_FRAME_FLAGS, "aw",
871 [Define to the flags needed for the .section .eh_frame directive.])
874 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
875 [libgo_cv_c_unused_arguments],
877 CFLAGS="$CFLAGS -Qunused-arguments"
878 AC_COMPILE_IFELSE([[int i;]],
879 [libgo_cv_c_unused_arguments=yes],
880 [libgo_cv_c_unused_arguments=no])
881 CFLAGS=$CFLAGS_hold])
883 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
884 libgo_cv_as_comdat_gnu, [
885 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
887 if test "$libgo_cv_c_unused_arguments" = yes; then
888 CFLAGS="$CFLAGS -Qunused-arguments"
890 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
891 libgo_cv_as_comdat_gnu=yes
893 libgo_cv_as_comdat_gnu=no
897 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
898 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
899 [Define if your assembler supports GNU comdat group syntax.])
902 AC_CACHE_CHECK([assembler supports pc related relocs],
903 libgo_cv_as_x86_pcrel, [
904 libgo_cv_as_x86_pcrel=yes
905 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
907 if test "$libgo_cv_c_unused_arguments" = yes; then
908 CFLAGS="$CFLAGS -Qunused-arguments"
910 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
911 libgo_cv_as_x86_pcrel=no
915 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
916 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
917 [Define if your assembler supports PC relative relocs.])
920 AC_CACHE_CHECK([assembler supports unwind section type],
921 libgo_cv_as_x86_64_unwind_section_type, [
922 libgo_cv_as_x86_64_unwind_section_type=yes
923 echo '.section .eh_frame,"a",@unwind' > conftest.s
925 if test "$libgo_cv_c_unused_arguments" = yes; then
926 CFLAGS="$CFLAGS -Qunused-arguments"
928 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
929 libgo_cv_as_x86_64_unwind_section_type=no
933 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
934 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
935 [Define if your assembler supports unwind section type.])
940 if test ${multilib} = yes; then
941 multilib_arg="--enable-multilib"
946 AC_CONFIG_FILES(Makefile testsuite/Makefile)
948 AC_CONFIG_COMMANDS([default],
949 [if test -n "$CONFIG_FILES"; then
950 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
951 # that multilib installs will end up installed in the correct place.
952 # The testsuite needs it for multilib-aware ABI baseline files.
953 # To work around this not being passed down from config-ml.in ->
954 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
955 # append it here. Only modify Makefiles that have just been created.
957 # Also, get rid of this simulated-VPATH thing that automake does.
959 s!`test -f '$<' || echo '$(srcdir)/'`!!
961 for i in $SUBDIRS; do
962 case $CONFIG_FILES in
964 #echo "Adding MULTISUBDIR to $i/Makefile"
965 sed -f vpsed $i/Makefile > tmp
966 grep '^MULTISUBDIR =' Makefile >> tmp
975 # Variables needed in config.status (file generation) which aren't already
976 # passed by autoconf.