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=11:0:0
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 mipso32 mipsn32 mipso64 mipsn64 mips mipsle mips64 mips64le mips64p32 mips64p32le ppc ppc64 ppc64le s390 s390x sparc sparc64"
213 # All known GOARCH_FAMILY values.
214 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 S390 S390X SPARC SPARC64"
217 GOARCH_FAMILY=unknown
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
248 i[34567]86-*-* | x86_64-*-*)
257 GOARCH_HUGEPAGESIZE="1 << 21"
261 GOARCH_HUGEPAGESIZE="1 << 21"
267 GOARCH_CACHELINESIZE=16384
268 GOARCH_PHYSPAGESIZE=65536
274 GOARCH_CACHELINESIZE=16
280 #if _MIPS_SIM != _ABIO32
285 #if _MIPS_SIM != _ABIN32
290 #if _MIPS_SIM != _ABI64
295 #if _MIPS_SIM != _ABIO64
299 [AC_MSG_ERROR([unknown MIPS ABI])
300 [mips_abi="n32"]])])])])
302 "o32") GOARCH=mipso32 ;;
303 "n32") GOARCH=mipsn32 ;;
304 "n64") GOARCH=mipsn64 ;;
305 "o64") GOARCH=mipso64 ;;
310 GOARCH_MINFRAMESIZE=4
314 GOARCH_MINFRAMESIZE=8
324 GOARCH_CACHELINESIZE=32
325 GOARCH_PHYSPAGESIZE=16384
328 rs6000*-*-* | powerpc*-*-*)
340 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
348 GOARCH_PHYSPAGESIZE=65536
350 GOARCH_MINFRAMESIZE=32
354 #if defined(__s390x__)
359 GOARCH_MINFRAMESIZE=4
362 GOARCH_MINFRAMESIZE=8
365 GOARCH_CACHELINESIZE=256
370 #if defined(__sparcv9) || defined(__arch64__)
377 GOARCH_FAMILY=SPARC64
380 GOARCH_PHYSPAGESIZE=8192
385 AC_SUBST(GOARCH_FAMILY)
386 AC_SUBST(GOARCH_BIGENDIAN)
387 AC_SUBST(GOARCH_CACHELINESIZE)
388 AC_SUBST(GOARCH_PHYSPAGESIZE)
389 AC_SUBST(GOARCH_PCQUANTUM)
390 AC_SUBST(GOARCH_INT64ALIGN)
391 AC_SUBST(GOARCH_HUGEPAGESIZE)
392 AC_SUBST(GOARCH_MINFRAMESIZE)
394 AC_SUBST(ALLGOARCHFAMILY)
396 dnl Some files are only present when needed for specific architectures.
398 GO_LIBCALL_OS_ARCH_FILE=
400 GO_SYSCALL_OS_ARCH_FILE=
401 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
402 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
404 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
405 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
407 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
408 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
410 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
411 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
413 AC_SUBST(GO_LIBCALL_OS_FILE)
414 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
415 AC_SUBST(GO_SYSCALL_OS_FILE)
416 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
418 dnl Special flags used to generate sysinfo.go.
419 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
422 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
423 # msghdr in <sys/socket.h>.
424 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
426 *-*-solaris2.1[[01]])
427 # Solaris 10+ needs this so struct msghdr gets the msg_control
428 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
429 # above doesn't work with C99.
430 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
435 dnl Check if assembler supports disabling hardware capability support.
436 GCC_CHECK_ASSEMBLER_HWCAP
438 dnl Use -fsplit-stack when compiling C code if available.
439 AC_CACHE_CHECK([whether -fsplit-stack is supported],
440 [libgo_cv_c_split_stack_supported],
442 CFLAGS="$CFLAGS -fsplit-stack"
443 AC_COMPILE_IFELSE([[int i;]],
444 [libgo_cv_c_split_stack_supported=yes],
445 [libgo_cv_c_split_stack_supported=no])
446 CFLAGS=$CFLAGS_hold])
448 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
449 dnl reject split-stack code calling non-split-stack code on targets
450 dnl they don't support.
451 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
452 [libgo_cv_c_linker_split_non_split],
453 [cat > conftest1.c << EOF
455 int main() { f(); return 0; }
457 cat > conftest2.c << EOF
460 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
461 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
462 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
463 libgo_cv_c_linker_split_non_split=yes
465 libgo_cv_c_linker_split_non_split=no
467 rm -f conftest1.* conftest2.* conftest])
469 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
470 SPLIT_STACK=-fsplit-stack
471 AC_DEFINE(USING_SPLIT_STACK, 1,
472 [Define if the compiler supports -fsplit-stack])
476 AC_SUBST(SPLIT_STACK)
477 AM_CONDITIONAL(USING_SPLIT_STACK,
478 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
480 dnl If the compiler supports split-stack but the linker does not, then
481 dnl we need to explicitly disable split-stack for Go.
482 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
483 GO_SPLIT_STACK=-fno-split-stack
487 AC_SUBST(GO_SPLIT_STACK)
489 dnl Check whether the linker does stack munging when calling from
490 dnl split-stack into non-split-stack code. We check this by looking
491 dnl at the --help output. FIXME: This is only half right: it's
492 dnl possible for the linker to support this for some targets but not
494 dnl This is slightly different from the above check, which is whether
495 dnl the linker permits the call at all.
496 AC_CACHE_CHECK([whether linker supports split stack],
497 [libgo_cv_c_linker_supports_split_stack],
498 [libgo_cv_c_linker_supports_split_stack=no
499 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
500 libgo_cv_c_linker_supports_split_stack=yes
502 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
503 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
504 [Define if the linker support split stack adjustments])
507 AC_CACHE_CHECK([whether compiler is llgo],
508 [libgo_cv_c_goc_is_llgo],
509 [libgo_cv_c_goc_is_llgo=no
510 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
511 libgo_cv_c_goc_is_llgo=yes
513 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
515 dnl Test for the -lm library.
517 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
520 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
521 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
522 [libgo_cv_lib_sockets=
524 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
525 if test "$libgo_check_socket" = "yes"; then
526 unset ac_cv_func_connect
527 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
528 libgo_check_both=yes)
530 if test "$libgo_check_both" = "yes"; then
532 LIBS="$LIBS -lsocket -lnsl"
533 unset ac_cv_func_accept
534 AC_CHECK_FUNC(accept,
536 libgo_cv_lib_sockets="-lsocket -lnsl"])
537 unset ac_cv_func_accept
540 unset ac_cv_func_gethostbyname
541 libgo_old_libs="$LIBS"
542 AC_CHECK_FUNC(gethostbyname, ,
543 [AC_CHECK_LIB(nsl, main,
544 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
545 unset ac_cv_func_gethostbyname
546 AC_CHECK_FUNC(sendfile, ,
547 [AC_CHECK_LIB(sendfile, main,
548 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
551 NET_LIBS="$libgo_cv_lib_sockets"
554 dnl Test whether the compiler supports the -pthread option.
555 AC_CACHE_CHECK([whether -pthread is supported],
556 [libgo_cv_lib_pthread],
558 CFLAGS="$CFLAGS -pthread"
559 AC_COMPILE_IFELSE([[int i;]],
560 [libgo_cv_lib_pthread=yes],
561 [libgo_cv_lib_pthread=no])
562 CFLAGS=$CFLAGS_hold])
564 if test "$libgo_cv_lib_pthread" = yes; then
565 PTHREAD_CFLAGS=-pthread
567 AC_SUBST(PTHREAD_CFLAGS)
569 dnl Test for the -lpthread library.
571 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
572 AC_SUBST(PTHREAD_LIBS)
574 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
575 AC_SEARCH_LIBS([sched_yield], [rt])
576 AC_SEARCH_LIBS([nanosleep], [rt])
577 AC_SEARCH_LIBS([clock_gettime], [rt])
581 GCC_CHECK_UNWIND_GETIPINFO
583 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/reboot.h netinet/icmp6.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
585 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
586 [#ifdef HAVE_SYS_SOCKET_H
587 #include <sys/socket.h>
591 AC_CACHE_CHECK([whether <ustat.h> can be used],
592 [libgo_cv_c_ustat_h],
594 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
597 #include <sys/types.h>
598 #ifdef HAVE_LINUX_FILTER_H
599 #include <linux/filter.h>
602 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
603 CFLAGS=$CFLAGS_hold])
604 if test $libgo_cv_c_ustat_h = yes; then
605 AC_DEFINE(HAVE_USTAT_H, 1,
606 [Define to 1 if you have the <ustat.h> header file and it works.])
609 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
611 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
612 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
613 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
615 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)
617 AC_CHECK_TYPES([loff_t])
621 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
624 CFLAGS_hold="$CFLAGS"
625 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
627 LIBS="$LIBS $PTHREAD_LIBS"
628 AC_CHECK_FUNCS(sem_timedwait)
629 CFLAGS="$CFLAGS_hold"
633 LIBS="$LIBS $MATH_LIBS"
634 AC_CHECK_FUNCS(matherr)
637 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
638 [libgo_cv_func___sync_bool_compare_and_swap_4],
640 typedef unsigned int uint32 __attribute__ ((mode (SI)));
642 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
644 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
645 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
646 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
647 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
648 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
651 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
652 [libgo_cv_func___sync_bool_compare_and_swap_8],
654 typedef unsigned int uint64 __attribute__ ((mode (DI)));
656 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
658 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
659 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
660 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
661 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
662 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
665 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
666 [libgo_cv_func___sync_fetch_and_add_4],
668 typedef unsigned int uint32 __attribute__ ((mode (SI)));
670 int main() { return __sync_fetch_and_add (&i, 1); }
672 [libgo_cv_func___sync_fetch_and_add_4=yes],
673 [libgo_cv_func___sync_fetch_and_add_4=no])])
674 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
675 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
676 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
679 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
680 [libgo_cv_func___sync_add_and_fetch_8],
682 typedef unsigned int uint64 __attribute__ ((mode (DI)));
684 int main() { return __sync_add_and_fetch (&i, 1); }
686 [libgo_cv_func___sync_add_and_fetch_8=yes],
687 [libgo_cv_func___sync_add_and_fetch_8=no])])
688 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
689 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
690 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
693 dnl For x86 we want to use the -minline-all-stringops option to avoid
694 dnl forcing a stack split when calling memcpy and friends.
695 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
696 [libgo_cv_c_stringops],
698 CFLAGS="$CFLAGS -minline-all-stringops"
699 AC_COMPILE_IFELSE([int i;],
700 [libgo_cv_c_stringops=yes],
701 [libgo_cv_c_stringops=no])
702 CFLAGS=$CFLAGS_hold])
704 if test "$libgo_cv_c_stringops" = yes; then
705 STRINGOPS_FLAG=-minline-all-stringops
707 AC_SUBST(STRINGOPS_FLAG)
709 dnl For x86 we want to compile the math library with -mfancy-math-387
710 dnl -funsafe-math-optimizations so that we can use the builtin
711 dnl instructions directly.
712 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
713 [libgo_cv_c_fancymath],
715 CFLAGS="$CFLAGS -mfancy-math-387"
716 AC_COMPILE_IFELSE([int i;],
717 [libgo_cv_c_fancymath=yes],
718 [libgo_cv_c_fancymath=no])
719 CFLAGS=$CFLAGS_hold])
721 if test "$libgo_cv_c_fancymath" = yes; then
722 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
724 MATH_FLAG="-ffp-contract=off"
729 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
730 AC_CHECK_TYPES([off64_t])
733 dnl Work out the size of the epoll_events struct on GNU/Linux.
734 AC_CACHE_CHECK([epoll_event size],
735 [libgo_cv_c_epoll_event_size],
736 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
737 [sizeof (struct epoll_event)],
738 [#include <sys/epoll.h>],
739 [libgo_cv_c_epoll_event_size=0])])
740 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
741 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
743 dnl Work out the offset of the fd field in the epoll_events struct on
745 AC_CACHE_CHECK([epoll_event data.fd offset],
746 [libgo_cv_c_epoll_event_fd_offset],
747 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
748 [offsetof (struct epoll_event, data.fd)],
750 #include <sys/epoll.h>],
751 [libgo_cv_c_epoll_event_fd_offset=0])])
752 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
753 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
755 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
756 dnl in Solaris 12 for XPG7 compatibility.
757 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
758 [have_stat_timespec=yes], [have_stat_timespec=no])
759 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
761 dnl See if struct exception is defined in <math.h>.
762 AC_CHECK_TYPE([struct exception],
763 [libgo_has_struct_exception=yes],
764 [libgo_has_struct_exception=no],
766 if test "$libgo_has_struct_exception" = "yes"; then
767 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
768 [Define to 1 if <math.h> defines struct exception])
771 dnl See whether setcontext changes the value of TLS variables.
772 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
773 [libgo_cv_lib_setcontext_clobbers_tls],
774 [CFLAGS_hold="$CFLAGS"
775 CFLAGS="$PTHREAD_CFLAGS"
777 LIBS="$LIBS $PTHREAD_LIBS"
778 AC_CHECK_SIZEOF([void *])
779 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
784 #include <ucontext.h>
789 static char stack[[10 * 1024 * 1024]];
792 /* Called via makecontext/setcontext. */
800 /* Called via pthread_create. */
805 /* The thread should still see this value after calling
811 /* The call to setcontext should not return. */
820 /* The thread should not see this value. */
823 if (getcontext (&c) < 0)
826 c.uc_stack.ss_sp = stack;
827 #ifdef MAKECONTEXT_STACK_TOP
828 c.uc_stack.ss_sp += sizeof stack;
830 c.uc_stack.ss_flags = 0;
831 c.uc_stack.ss_size = sizeof stack;
833 makecontext (&c, cfn, 0);
835 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
838 if (pthread_join (tid, NULL) != 0)
841 /* The thread should have called exit. */
845 [libgo_cv_lib_setcontext_clobbers_tls=no],
846 [libgo_cv_lib_setcontext_clobbers_tls=yes],
847 [case "$target:$ptr_type_size" in
848 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
849 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
851 libgo_cv_lib_setcontext_clobbers_tls=no ;;
854 CFLAGS="$CFLAGS_hold"
857 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
858 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
859 [Define if setcontext clobbers TLS variables])
862 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
863 libgo_cv_ro_eh_frame, [
864 libgo_cv_ro_eh_frame=no
865 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
866 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
867 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
868 libgo_cv_ro_eh_frame=yes
869 elif grep '.section.*eh_frame.*#alloc' conftest.c \
870 | grep -v '#write' > /dev/null; then
871 libgo_cv_ro_eh_frame=yes
876 if test "x$libgo_cv_ro_eh_frame" = xyes; then
877 AC_DEFINE(EH_FRAME_FLAGS, "a",
878 [Define to the flags needed for the .section .eh_frame directive.])
880 AC_DEFINE(EH_FRAME_FLAGS, "aw",
881 [Define to the flags needed for the .section .eh_frame directive.])
884 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
885 [libgo_cv_c_unused_arguments],
887 CFLAGS="$CFLAGS -Qunused-arguments"
888 AC_COMPILE_IFELSE([[int i;]],
889 [libgo_cv_c_unused_arguments=yes],
890 [libgo_cv_c_unused_arguments=no])
891 CFLAGS=$CFLAGS_hold])
893 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
894 libgo_cv_as_comdat_gnu, [
895 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
897 if test "$libgo_cv_c_unused_arguments" = yes; then
898 CFLAGS="$CFLAGS -Qunused-arguments"
900 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
901 libgo_cv_as_comdat_gnu=yes
903 libgo_cv_as_comdat_gnu=no
907 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
908 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
909 [Define if your assembler supports GNU comdat group syntax.])
912 AC_CACHE_CHECK([assembler supports pc related relocs],
913 libgo_cv_as_x86_pcrel, [
914 libgo_cv_as_x86_pcrel=yes
915 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
917 if test "$libgo_cv_c_unused_arguments" = yes; then
918 CFLAGS="$CFLAGS -Qunused-arguments"
920 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
921 libgo_cv_as_x86_pcrel=no
925 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
926 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
927 [Define if your assembler supports PC relative relocs.])
930 AC_CACHE_CHECK([assembler supports unwind section type],
931 libgo_cv_as_x86_64_unwind_section_type, [
932 libgo_cv_as_x86_64_unwind_section_type=yes
933 echo '.section .eh_frame,"a",@unwind' > conftest.s
935 if test "$libgo_cv_c_unused_arguments" = yes; then
936 CFLAGS="$CFLAGS -Qunused-arguments"
938 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
939 libgo_cv_as_x86_64_unwind_section_type=no
943 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
944 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
945 [Define if your assembler supports unwind section type.])
948 AC_CACHE_CHECK([assembler supports AES instructions],
949 libgo_cv_as_x86_aes, [
950 libgo_cv_as_x86_aes=yes
951 echo 'aesenc %xmm0, %xmm1' > conftest.s
953 if test "$libgo_cv_c_unused_arguments" = yes; then
954 CFLAGS="$CFLAGS -Qunused-arguments"
956 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
957 libgo_cv_as_x86_aes=no
961 if test "x$libgo_cv_as_x86_aes" = xyes; then
962 AC_DEFINE(HAVE_AS_X86_AES, 1,
963 [Define if your assembler supports AES instructions.])
968 if test ${multilib} = yes; then
969 multilib_arg="--enable-multilib"
974 AC_CONFIG_FILES(Makefile testsuite/Makefile)
976 AC_CONFIG_COMMANDS([default],
977 [if test -n "$CONFIG_FILES"; then
978 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
979 # that multilib installs will end up installed in the correct place.
980 # The testsuite needs it for multilib-aware ABI baseline files.
981 # To work around this not being passed down from config-ml.in ->
982 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
983 # append it here. Only modify Makefiles that have just been created.
985 # Also, get rid of this simulated-VPATH thing that automake does.
987 s!`test -f '$<' || echo '$(srcdir)/'`!!
989 for i in $SUBDIRS; do
990 case $CONFIG_FILES in
992 #echo "Adding MULTISUBDIR to $i/Makefile"
993 sed -f vpsed $i/Makefile > tmp
994 grep '^MULTISUBDIR =' Makefile >> tmp
1003 # Variables needed in config.status (file generation) which aren't already
1004 # passed by autoconf.