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=13:0:0
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])
36 # static hash tables crashes on AIX when libgo is built with O2
37 CFLAGS="$CFLAGS -fno-section-anchors"
38 GOCFLAGS="$GOCFLAGS -fno-section-anchors"
46 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
50 AC_SUBST(enable_shared)
51 AC_SUBST(enable_static)
53 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
54 AC_SUBST(CC_FOR_BUILD)
58 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
61 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
62 [turns on -Werror @<:@default=yes@:>@])])
63 if test "x$enable_werror" != "xno"; then
69 glibgo_toolexeclibdir=no
71 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
72 AC_ARG_ENABLE([version-specific-runtime-libs],
73 AC_HELP_STRING([--enable-version-specific-runtime-libs],
74 [Specify that runtime libraries should be installed in a compiler-specific directory]),
76 yes) version_specific_libs=yes ;;
77 no) version_specific_libs=no ;;
78 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
80 [version_specific_libs=no])
81 AC_MSG_RESULT($version_specific_libs)
83 # Version-specific runtime libs processing.
84 if test $version_specific_libs = yes; then
85 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
86 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
89 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
90 # Install a library built with a cross compiler in tooldir, not libdir.
91 if test -n "$with_cross_host" &&
92 test x"$with_cross_host" != x"no"; then
93 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
94 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
96 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
97 nover_glibgo_toolexeclibdir='${libdir}'
99 multi_os_directory=`$GOC -print-multi-os-directory`
100 case $multi_os_directory in
101 .) ;; # Avoid trailing /.
102 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
105 if test x"$glibgo_toolexecdir" = x"no"; then
106 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
107 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
110 AC_SUBST(glibgo_toolexecdir)
111 AC_SUBST(glibgo_toolexeclibdir)
112 AC_SUBST(nover_glibgo_toolexeclibdir)
114 # See if the user wants to configure without libffi. Some
115 # architectures don't support it. FIXME: We should set a default
118 AS_HELP_STRING([--without-libffi],
121 [with_libffi=${with_libffi_default-yes}])
125 if test "$with_libffi" != no; then
126 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
127 LIBFFI=../libffi/libffi_convenience.la
128 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
132 AM_CONDITIONAL(USE_LIBFFI, test "$with_liffi" != "no")
134 # See if the user wants to configure without libatomic. This is useful if we are
135 # on an architecture for which libgo does not need an atomic support library and
136 # libatomic does not support our C compiler.
137 AC_ARG_WITH(libatomic,
138 AS_HELP_STRING([--without-libatomic],
139 [don't use libatomic]),
141 [with_libatomic=${with_libatomic_default-yes}])
144 if test "$with_libatomic" != no; then
145 LIBATOMIC=../libatomic/libatomic_convenience.la
149 # Used to tell GNU make to include a file without telling automake to
151 go_include="-include"
154 # All known GOOS values. This is the union of all operating systems
155 # supported by the gofrontend and all operating systems supported by
157 ALLGOOS="aix android darwin dragonfly freebsd irix linux netbsd openbsd plan9 rtems solaris windows"
171 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
172 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
173 *-*-irix6*) is_irix=yes; GOOS=irix ;;
174 *-*-linux*) is_linux=yes; GOOS=linux ;;
175 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
176 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
177 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
178 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
179 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
180 *-*-aix*) is_aix=yes; GOOS=aix ;;
182 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
183 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
184 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
185 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
186 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
187 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
188 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
189 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
190 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
191 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
192 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)
196 dnl Test whether we need to use DejaGNU or whether we can use the
197 dnl simpler gotest approach. We can only use gotest for a native
201 *-*-rtems*) USE_DEJAGNU=yes ;;
203 *) USE_DEJAGNU=yes ;;
205 AC_SUBST(USE_DEJAGNU)
207 # All known GOARCH values. This is the union of all architectures
208 # supported by the gofrontend and all architectures supported by the
210 # N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
211 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le ppc ppc64 ppc64le s390 s390x sh shbe sparc sparc64"
213 # All known GOARCH_FAMILY values.
214 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 S390 S390X SH SPARC SPARC64"
217 GOARCH_FAMILY=unknown
218 GOARCH_BIGENDIAN=false
219 GOARCH_CACHELINESIZE=64
220 GOARCH_PHYSPAGESIZE=4096
223 GOARCH_HUGEPAGESIZE=0
224 GOARCH_MINFRAMESIZE=0
229 GOARCH_PHYSPAGESIZE=8192
235 GOARCH_CACHELINESIZE=32
236 GOARCH_PHYSPAGESIZE=65536
238 GOARCH_MINFRAMESIZE=8
240 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
243 GOARCH_CACHELINESIZE=32
245 GOARCH_MINFRAMESIZE=4
249 GOARCH_BIGENDIAN=true
254 i[34567]86-*-* | x86_64-*-*)
263 GOARCH_HUGEPAGESIZE="1 << 21"
267 GOARCH_HUGEPAGESIZE="1 << 21"
273 GOARCH_CACHELINESIZE=128
274 GOARCH_PHYSPAGESIZE=65536
279 GOARCH_BIGENDIAN=true
280 GOARCH_CACHELINESIZE=16
286 #if _MIPS_SIM != _ABIO32
291 #if _MIPS_SIM != _ABIN32
296 #if _MIPS_SIM != _ABI64
300 [AC_MSG_ERROR([unknown MIPS ABI])
301 [mips_abi="n32"]])])])
303 "o32") GOARCH=mips ;;
304 "n32") GOARCH=mips64p32 ;;
305 "n64") GOARCH=mips64 ;;
310 GOARCH_MINFRAMESIZE=4
314 GOARCH_MINFRAMESIZE=8
322 GOARCH_BIGENDIAN=true
325 GOARCH_CACHELINESIZE=32
326 GOARCH_PHYSPAGESIZE=16384
329 rs6000*-*-* | powerpc*-*-*)
336 GOARCH_BIGENDIAN=true
341 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
347 GOARCH_BIGENDIAN=true
349 GOARCH_PHYSPAGESIZE=65536
351 GOARCH_MINFRAMESIZE=32
355 #if defined(__s390x__)
360 GOARCH_MINFRAMESIZE=4
363 GOARCH_MINFRAMESIZE=8
365 GOARCH_BIGENDIAN=true
366 GOARCH_CACHELINESIZE=256
372 GOARCH_BIGENDIAN=true
373 GOARCH_CACHELINESIZE=16
375 GOARCH_MINFRAMESIZE=4
380 GOARCH_CACHELINESIZE=16
382 GOARCH_MINFRAMESIZE=4
387 GOARCH_BIGENDIAN=true
388 GOARCH_CACHELINESIZE=32
390 GOARCH_MINFRAMESIZE=4
395 GOARCH_CACHELINESIZE=32
397 GOARCH_MINFRAMESIZE=4
401 #if defined(__sparcv9) || defined(__arch64__)
408 GOARCH_FAMILY=SPARC64
410 GOARCH_BIGENDIAN=true
411 GOARCH_PHYSPAGESIZE=8192
416 AC_SUBST(GOARCH_FAMILY)
417 AC_SUBST(GOARCH_BIGENDIAN)
418 AC_SUBST(GOARCH_CACHELINESIZE)
419 AC_SUBST(GOARCH_PHYSPAGESIZE)
420 AC_SUBST(GOARCH_PCQUANTUM)
421 AC_SUBST(GOARCH_INT64ALIGN)
422 AC_SUBST(GOARCH_HUGEPAGESIZE)
423 AC_SUBST(GOARCH_MINFRAMESIZE)
425 AC_SUBST(ALLGOARCHFAMILY)
427 dnl Some files are only present when needed for specific architectures.
429 GO_LIBCALL_OS_ARCH_FILE=
431 GO_SYSCALL_OS_ARCH_FILE=
432 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
433 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
435 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
436 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
438 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
439 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
441 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
442 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
444 AC_SUBST(GO_LIBCALL_OS_FILE)
445 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
446 AC_SUBST(GO_SYSCALL_OS_FILE)
447 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
449 dnl Special flags used to generate sysinfo.go.
450 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
453 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
454 # msghdr in <sys/socket.h>.
455 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
457 *-*-solaris2.1[[01]])
458 # Solaris 10+ needs this so struct msghdr gets the msg_control
459 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
460 # above doesn't work with C99.
461 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
466 dnl Check if assembler supports disabling hardware capability support.
467 GCC_CHECK_ASSEMBLER_HWCAP
469 dnl Use -fsplit-stack when compiling C code if available.
470 AC_CACHE_CHECK([whether -fsplit-stack is supported],
471 [libgo_cv_c_split_stack_supported],
473 CFLAGS="$CFLAGS -fsplit-stack"
474 AC_COMPILE_IFELSE([[int i;]],
475 [libgo_cv_c_split_stack_supported=yes],
476 [libgo_cv_c_split_stack_supported=no])
477 CFLAGS=$CFLAGS_hold])
479 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
480 dnl reject split-stack code calling non-split-stack code on targets
481 dnl they don't support.
482 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
483 [libgo_cv_c_linker_split_non_split],
484 [cat > conftest1.c << EOF
486 int main() { f(); return 0; }
488 cat > conftest2.c << EOF
491 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
492 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
493 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
494 libgo_cv_c_linker_split_non_split=yes
496 libgo_cv_c_linker_split_non_split=no
498 rm -f conftest1.* conftest2.* conftest])
500 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
501 SPLIT_STACK=-fsplit-stack
502 AC_DEFINE(USING_SPLIT_STACK, 1,
503 [Define if the compiler supports -fsplit-stack])
507 AC_SUBST(SPLIT_STACK)
508 AM_CONDITIONAL(USING_SPLIT_STACK,
509 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
511 dnl If the compiler supports split-stack but the linker does not, then
512 dnl we need to explicitly disable split-stack for Go.
513 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
514 GO_SPLIT_STACK=-fno-split-stack
518 AC_SUBST(GO_SPLIT_STACK)
520 dnl Check whether the linker does stack munging when calling from
521 dnl split-stack into non-split-stack code. We check this by looking
522 dnl at the --help output. FIXME: This is only half right: it's
523 dnl possible for the linker to support this for some targets but not
525 dnl This is slightly different from the above check, which is whether
526 dnl the linker permits the call at all.
527 AC_CACHE_CHECK([whether linker supports split stack],
528 [libgo_cv_c_linker_supports_split_stack],
529 [libgo_cv_c_linker_supports_split_stack=no
530 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
531 libgo_cv_c_linker_supports_split_stack=yes
533 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
534 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
535 [Define if the linker support split stack adjustments])
538 AC_CACHE_CHECK([whether compiler is llgo],
539 [libgo_cv_c_goc_is_llgo],
540 [libgo_cv_c_goc_is_llgo=no
541 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
542 libgo_cv_c_goc_is_llgo=yes
544 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
546 dnl Test for the -lm library.
548 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
551 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
552 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
553 [libgo_cv_lib_sockets=
555 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
556 if test "$libgo_check_socket" = "yes"; then
557 unset ac_cv_func_connect
558 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
559 libgo_check_both=yes)
561 if test "$libgo_check_both" = "yes"; then
563 LIBS="$LIBS -lsocket -lnsl"
564 unset ac_cv_func_accept
565 AC_CHECK_FUNC(accept,
567 libgo_cv_lib_sockets="-lsocket -lnsl"])
568 unset ac_cv_func_accept
571 unset ac_cv_func_gethostbyname
572 libgo_old_libs="$LIBS"
573 AC_CHECK_FUNC(gethostbyname, ,
574 [AC_CHECK_LIB(nsl, main,
575 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
576 unset ac_cv_func_gethostbyname
577 AC_CHECK_FUNC(sendfile, ,
578 [AC_CHECK_LIB(sendfile, main,
579 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
582 NET_LIBS="$libgo_cv_lib_sockets"
585 dnl Test whether the compiler supports the -pthread option.
586 AC_CACHE_CHECK([whether -pthread is supported],
587 [libgo_cv_lib_pthread],
589 CFLAGS="$CFLAGS -pthread"
590 AC_COMPILE_IFELSE([[int i;]],
591 [libgo_cv_lib_pthread=yes],
592 [libgo_cv_lib_pthread=no])
593 CFLAGS=$CFLAGS_hold])
595 if test "$libgo_cv_lib_pthread" = yes; then
596 PTHREAD_CFLAGS=-pthread
598 AC_SUBST(PTHREAD_CFLAGS)
600 dnl Test for the -lpthread library.
602 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
603 AC_SUBST(PTHREAD_LIBS)
605 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
606 AC_SEARCH_LIBS([sched_yield], [rt])
607 AC_SEARCH_LIBS([nanosleep], [rt])
608 AC_SEARCH_LIBS([clock_gettime], [rt])
612 GCC_CHECK_UNWIND_GETIPINFO
614 AC_CHECK_HEADERS(port.h sched.h semaphore.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/event.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/ptrace.h linux/reboot.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
616 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
617 [#include <netinet/in.h>
620 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
621 [#ifdef HAVE_SYS_SOCKET_H
622 #include <sys/socket.h>
626 AC_CACHE_CHECK([whether <ustat.h> can be used],
627 [libgo_cv_c_ustat_h],
629 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
632 #include <sys/types.h>
633 #ifdef HAVE_LINUX_FILTER_H
634 #include <linux/filter.h>
637 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
638 CFLAGS=$CFLAGS_hold])
639 if test $libgo_cv_c_ustat_h = yes; then
640 AC_DEFINE(HAVE_USTAT_H, 1,
641 [Define to 1 if you have the <ustat.h> header file and it works.])
644 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
646 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
647 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
648 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
650 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 syscall tee unlinkat unshare utimensat)
652 AC_CHECK_TYPES([loff_t])
656 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
659 CFLAGS_hold="$CFLAGS"
660 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
662 LIBS="$LIBS $PTHREAD_LIBS"
663 AC_CHECK_FUNCS(sem_timedwait)
664 CFLAGS="$CFLAGS_hold"
668 LIBS="$LIBS $MATH_LIBS"
669 AC_CHECK_FUNCS(matherr)
672 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
673 [libgo_cv_func___sync_bool_compare_and_swap_4],
675 typedef unsigned int uint32 __attribute__ ((mode (SI)));
677 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
679 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
680 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
681 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
682 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
683 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
686 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
687 [libgo_cv_func___sync_bool_compare_and_swap_8],
689 typedef unsigned int uint64 __attribute__ ((mode (DI)));
691 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
693 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
694 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
695 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
696 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
697 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
700 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
701 [libgo_cv_func___sync_fetch_and_add_4],
703 typedef unsigned int uint32 __attribute__ ((mode (SI)));
705 int main() { return __sync_fetch_and_add (&i, 1); }
707 [libgo_cv_func___sync_fetch_and_add_4=yes],
708 [libgo_cv_func___sync_fetch_and_add_4=no])])
709 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
710 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
711 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
714 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
715 [libgo_cv_func___sync_add_and_fetch_8],
717 typedef unsigned int uint64 __attribute__ ((mode (DI)));
719 int main() { return __sync_add_and_fetch (&i, 1); }
721 [libgo_cv_func___sync_add_and_fetch_8=yes],
722 [libgo_cv_func___sync_add_and_fetch_8=no])])
723 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
724 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
725 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
728 dnl For x86 we want to use the -minline-all-stringops option to avoid
729 dnl forcing a stack split when calling memcpy and friends.
730 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
731 [libgo_cv_c_stringops],
733 CFLAGS="$CFLAGS -minline-all-stringops"
734 AC_COMPILE_IFELSE([int i;],
735 [libgo_cv_c_stringops=yes],
736 [libgo_cv_c_stringops=no])
737 CFLAGS=$CFLAGS_hold])
739 if test "$libgo_cv_c_stringops" = yes; then
740 STRINGOPS_FLAG=-minline-all-stringops
742 AC_SUBST(STRINGOPS_FLAG)
744 dnl For x86 we want to compile the math library with -mfancy-math-387
745 dnl -funsafe-math-optimizations so that we can use the builtin
746 dnl instructions directly.
747 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
748 [libgo_cv_c_fancymath],
750 CFLAGS="$CFLAGS -mfancy-math-387"
751 AC_COMPILE_IFELSE([int i;],
752 [libgo_cv_c_fancymath=yes],
753 [libgo_cv_c_fancymath=no])
754 CFLAGS=$CFLAGS_hold])
756 if test "$libgo_cv_c_fancymath" = yes; then
757 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations -fno-math-errno"
759 MATH_FLAG="-ffp-contract=off"
764 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
765 AC_CHECK_TYPES([off64_t])
768 dnl Work out the size of the epoll_events struct on GNU/Linux.
769 AC_CACHE_CHECK([epoll_event size],
770 [libgo_cv_c_epoll_event_size],
771 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
772 [sizeof (struct epoll_event)],
773 [#include <sys/epoll.h>],
774 [libgo_cv_c_epoll_event_size=0])])
775 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
776 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
778 dnl Work out the offset of the fd field in the epoll_events struct on
780 AC_CACHE_CHECK([epoll_event data.fd offset],
781 [libgo_cv_c_epoll_event_fd_offset],
782 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
783 [offsetof (struct epoll_event, data.fd)],
785 #include <sys/epoll.h>],
786 [libgo_cv_c_epoll_event_fd_offset=0])])
787 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
788 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
790 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
791 dnl in Solaris 11.4 for XPG7 compatibility.
792 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
793 [have_stat_timespec=yes], [have_stat_timespec=no])
794 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
796 dnl See if struct exception is defined in <math.h>.
797 AC_CHECK_TYPE([struct exception],
798 [libgo_has_struct_exception=yes],
799 [libgo_has_struct_exception=no],
801 if test "$libgo_has_struct_exception" = "yes"; then
802 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
803 [Define to 1 if <math.h> defines struct exception])
806 dnl See whether setcontext changes the value of TLS variables.
807 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
808 [libgo_cv_lib_setcontext_clobbers_tls],
809 [CFLAGS_hold="$CFLAGS"
810 CFLAGS="$PTHREAD_CFLAGS"
812 LIBS="$LIBS $PTHREAD_LIBS"
813 AC_CHECK_SIZEOF([void *])
814 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
819 #include <ucontext.h>
824 static char stack[[10 * 1024 * 1024]];
827 /* Called via makecontext/setcontext. */
835 /* Called via pthread_create. */
840 /* The thread should still see this value after calling
846 /* The call to setcontext should not return. */
855 /* The thread should not see this value. */
858 if (getcontext (&c) < 0)
861 c.uc_stack.ss_sp = stack;
862 #ifdef MAKECONTEXT_STACK_TOP
863 c.uc_stack.ss_sp += sizeof stack;
865 c.uc_stack.ss_flags = 0;
866 c.uc_stack.ss_size = sizeof stack;
868 makecontext (&c, cfn, 0);
870 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
873 if (pthread_join (tid, NULL) != 0)
876 /* The thread should have called exit. */
880 [libgo_cv_lib_setcontext_clobbers_tls=no],
881 [libgo_cv_lib_setcontext_clobbers_tls=yes],
882 [case "$target:$ptr_type_size" in
883 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
884 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
886 libgo_cv_lib_setcontext_clobbers_tls=no ;;
889 CFLAGS="$CFLAGS_hold"
892 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
893 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
894 [Define if setcontext clobbers TLS variables])
897 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
898 libgo_cv_ro_eh_frame, [
899 libgo_cv_ro_eh_frame=no
900 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
901 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
902 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
903 libgo_cv_ro_eh_frame=yes
904 elif grep '.section.*eh_frame.*#alloc' conftest.c \
905 | grep -v '#write' > /dev/null; then
906 libgo_cv_ro_eh_frame=yes
911 if test "x$libgo_cv_ro_eh_frame" = xyes; then
912 AC_DEFINE(EH_FRAME_FLAGS, "a",
913 [Define to the flags needed for the .section .eh_frame directive.])
915 AC_DEFINE(EH_FRAME_FLAGS, "aw",
916 [Define to the flags needed for the .section .eh_frame directive.])
919 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
920 [libgo_cv_c_unused_arguments],
922 CFLAGS="$CFLAGS -Qunused-arguments"
923 AC_COMPILE_IFELSE([[int i;]],
924 [libgo_cv_c_unused_arguments=yes],
925 [libgo_cv_c_unused_arguments=no])
926 CFLAGS=$CFLAGS_hold])
928 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
929 libgo_cv_as_comdat_gnu, [
930 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
932 if test "$libgo_cv_c_unused_arguments" = yes; then
933 CFLAGS="$CFLAGS -Qunused-arguments"
935 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
936 libgo_cv_as_comdat_gnu=yes
938 libgo_cv_as_comdat_gnu=no
942 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
943 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
944 [Define if your assembler supports GNU comdat group syntax.])
947 AC_CACHE_CHECK([assembler supports pc related relocs],
948 libgo_cv_as_x86_pcrel, [
949 libgo_cv_as_x86_pcrel=yes
950 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
952 if test "$libgo_cv_c_unused_arguments" = yes; then
953 CFLAGS="$CFLAGS -Qunused-arguments"
955 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
956 libgo_cv_as_x86_pcrel=no
960 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
961 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
962 [Define if your assembler supports PC relative relocs.])
965 AC_CACHE_CHECK([assembler supports unwind section type],
966 libgo_cv_as_x86_64_unwind_section_type, [
967 libgo_cv_as_x86_64_unwind_section_type=yes
968 echo '.section .eh_frame,"a",@unwind' > conftest.s
970 if test "$libgo_cv_c_unused_arguments" = yes; then
971 CFLAGS="$CFLAGS -Qunused-arguments"
973 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
974 libgo_cv_as_x86_64_unwind_section_type=no
978 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
979 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
980 [Define if your assembler supports unwind section type.])
983 AC_CACHE_CHECK([assembler supports AES instructions],
984 libgo_cv_as_x86_aes, [
985 libgo_cv_as_x86_aes=yes
986 echo 'aesenc %xmm0, %xmm1' > conftest.s
988 if test "$libgo_cv_c_unused_arguments" = yes; then
989 CFLAGS="$CFLAGS -Qunused-arguments"
991 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
992 libgo_cv_as_x86_aes=no
996 if test "x$libgo_cv_as_x86_aes" = xyes; then
997 AC_DEFINE(HAVE_AS_X86_AES, 1,
998 [Define if your assembler supports AES instructions.])
1003 if test ${multilib} = yes; then
1004 multilib_arg="--enable-multilib"
1009 AC_CONFIG_FILES(Makefile testsuite/Makefile)
1011 AC_CONFIG_COMMANDS([default],
1012 [if test -n "$CONFIG_FILES"; then
1013 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
1014 # that multilib installs will end up installed in the correct place.
1015 # The testsuite needs it for multilib-aware ABI baseline files.
1016 # To work around this not being passed down from config-ml.in ->
1017 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
1018 # append it here. Only modify Makefiles that have just been created.
1020 # Also, get rid of this simulated-VPATH thing that automake does.
1021 cat > vpsed << \_EOF
1022 s!`test -f '$<' || echo '$(srcdir)/'`!!
1024 for i in $SUBDIRS; do
1025 case $CONFIG_FILES in
1027 #echo "Adding MULTISUBDIR to $i/Makefile"
1028 sed -f vpsed $i/Makefile > tmp
1029 grep '^MULTISUBDIR =' Makefile >> tmp
1038 # Variables needed in config.status (file generation) which aren't already
1039 # passed by autoconf.