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
233 GOARCH_MINFRAMESIZE=4
236 i[34567]86-*-* | x86_64-*-*)
245 GOARCH_HUGEPAGESIZE="1 << 21"
249 GOARCH_HUGEPAGESIZE="1 << 21"
255 GOARCH_CACHELINESIZE=16384
256 GOARCH_PHYSPAGESIZE=65536
262 GOARCH_CACHELINESIZE=16
268 #if _MIPS_SIM != _ABIO32
273 #if _MIPS_SIM != _ABIN32
278 #if _MIPS_SIM != _ABI64
283 #if _MIPS_SIM != _ABIO64
287 [AC_MSG_ERROR([unknown MIPS ABI])
288 [mips_abi="n32"]])])])])
290 "o32") GOARCH=mipso32 ;;
291 "n32") GOARCH=mipsn32 ;;
292 "n64") GOARCH=mipsn64 ;;
293 "o64") GOARCH=mipso64 ;;
298 GOARCH_MINFRAMESIZE=4
302 GOARCH_MINFRAMESIZE=8
312 GOARCH_CACHELINESIZE=32
313 GOARCH_PHYSPAGESIZE=16384
316 rs6000*-*-* | powerpc*-*-*)
328 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
336 GOARCH_PHYSPAGESIZE=65536
338 GOARCH_MINFRAMESIZE=32
342 #if defined(__s390x__)
347 GOARCH_MINFRAMESIZE=4
350 GOARCH_MINFRAMESIZE=8
353 GOARCH_CACHELINESIZE=256
358 #if defined(__sparcv9) || defined(__arch64__)
365 GOARCH_FAMILY=SPARC64
368 GOARCH_PHYSPAGESIZE=8192
373 AC_SUBST(GOARCH_FAMILY)
374 AC_SUBST(GOARCH_BIGENDIAN)
375 AC_SUBST(GOARCH_CACHELINESIZE)
376 AC_SUBST(GOARCH_PHYSPAGESIZE)
377 AC_SUBST(GOARCH_PCQUANTUM)
378 AC_SUBST(GOARCH_INT64ALIGN)
379 AC_SUBST(GOARCH_HUGEPAGESIZE)
380 AC_SUBST(GOARCH_MINFRAMESIZE)
382 AC_SUBST(ALLGOARCHFAMILY)
384 dnl Some files are only present when needed for specific architectures.
386 GO_LIBCALL_OS_ARCH_FILE=
388 GO_SYSCALL_OS_ARCH_FILE=
389 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
390 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
392 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
393 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
395 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
396 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
398 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
399 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
401 AC_SUBST(GO_LIBCALL_OS_FILE)
402 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
403 AC_SUBST(GO_SYSCALL_OS_FILE)
404 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
406 dnl Special flags used to generate sysinfo.go.
407 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
410 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
411 # msghdr in <sys/socket.h>.
412 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
414 *-*-solaris2.1[[01]])
415 # Solaris 10+ needs this so struct msghdr gets the msg_control
416 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
417 # above doesn't work with C99.
418 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
423 dnl Use -fsplit-stack when compiling C code if available.
424 AC_CACHE_CHECK([whether -fsplit-stack is supported],
425 [libgo_cv_c_split_stack_supported],
427 CFLAGS="$CFLAGS -fsplit-stack"
428 AC_COMPILE_IFELSE([[int i;]],
429 [libgo_cv_c_split_stack_supported=yes],
430 [libgo_cv_c_split_stack_supported=no])
431 CFLAGS=$CFLAGS_hold])
433 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
434 dnl reject split-stack code calling non-split-stack code on targets
435 dnl they don't support.
436 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
437 [libgo_cv_c_linker_split_non_split],
438 [cat > conftest1.c << EOF
440 int main() { f(); return 0; }
442 cat > conftest2.c << EOF
445 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
446 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
447 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
448 libgo_cv_c_linker_split_non_split=yes
450 libgo_cv_c_linker_split_non_split=no
452 rm -f conftest1.* conftest2.* conftest])
454 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
455 SPLIT_STACK=-fsplit-stack
456 AC_DEFINE(USING_SPLIT_STACK, 1,
457 [Define if the compiler supports -fsplit-stack])
461 AC_SUBST(SPLIT_STACK)
462 AM_CONDITIONAL(USING_SPLIT_STACK,
463 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
465 dnl If the compiler supports split-stack but the linker does not, then
466 dnl we need to explicitly disable split-stack for Go.
467 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
468 GO_SPLIT_STACK=-fno-split-stack
472 AC_SUBST(GO_SPLIT_STACK)
474 dnl Check whether the linker does stack munging when calling from
475 dnl split-stack into non-split-stack code. We check this by looking
476 dnl at the --help output. FIXME: This is only half right: it's
477 dnl possible for the linker to support this for some targets but not
479 dnl This is slightly different from the above check, which is whether
480 dnl the linker permits the call at all.
481 AC_CACHE_CHECK([whether linker supports split stack],
482 [libgo_cv_c_linker_supports_split_stack],
483 [libgo_cv_c_linker_supports_split_stack=no
484 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
485 libgo_cv_c_linker_supports_split_stack=yes
487 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
488 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
489 [Define if the linker support split stack adjustments])
492 AC_CACHE_CHECK([whether compiler is llgo],
493 [libgo_cv_c_goc_is_llgo],
494 [libgo_cv_c_goc_is_llgo=no
495 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
496 libgo_cv_c_goc_is_llgo=yes
498 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
500 dnl Test for the -lm library.
502 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
505 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
506 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
507 [libgo_cv_lib_sockets=
509 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
510 if test "$libgo_check_socket" = "yes"; then
511 unset ac_cv_func_connect
512 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
513 libgo_check_both=yes)
515 if test "$libgo_check_both" = "yes"; then
517 LIBS="$LIBS -lsocket -lnsl"
518 unset ac_cv_func_accept
519 AC_CHECK_FUNC(accept,
521 libgo_cv_lib_sockets="-lsocket -lnsl"])
522 unset ac_cv_func_accept
525 unset ac_cv_func_gethostbyname
526 libgo_old_libs="$LIBS"
527 AC_CHECK_FUNC(gethostbyname, ,
528 [AC_CHECK_LIB(nsl, main,
529 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
530 unset ac_cv_func_gethostbyname
531 AC_CHECK_FUNC(sendfile, ,
532 [AC_CHECK_LIB(sendfile, main,
533 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
536 NET_LIBS="$libgo_cv_lib_sockets"
539 dnl Test whether the compiler supports the -pthread option.
540 AC_CACHE_CHECK([whether -pthread is supported],
541 [libgo_cv_lib_pthread],
543 CFLAGS="$CFLAGS -pthread"
544 AC_COMPILE_IFELSE([[int i;]],
545 [libgo_cv_lib_pthread=yes],
546 [libgo_cv_lib_pthread=no])
547 CFLAGS=$CFLAGS_hold])
549 if test "$libgo_cv_lib_pthread" = yes; then
550 PTHREAD_CFLAGS=-pthread
552 AC_SUBST(PTHREAD_CFLAGS)
554 dnl Test for the -lpthread library.
556 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
557 AC_SUBST(PTHREAD_LIBS)
559 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
560 AC_SEARCH_LIBS([sched_yield], [rt])
561 AC_SEARCH_LIBS([nanosleep], [rt])
562 AC_SEARCH_LIBS([clock_gettime], [rt])
566 GCC_CHECK_UNWIND_GETIPINFO
568 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)
570 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
571 [#ifdef HAVE_SYS_SOCKET_H
572 #include <sys/socket.h>
576 AC_CACHE_CHECK([whether <ustat.h> can be used],
577 [libgo_cv_c_ustat_h],
579 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
582 #include <sys/types.h>
583 #ifdef HAVE_LINUX_FILTER_H
584 #include <linux/filter.h>
587 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
588 CFLAGS=$CFLAGS_hold])
589 if test $libgo_cv_c_ustat_h = yes; then
590 AC_DEFINE(HAVE_USTAT_H, 1,
591 [Define to 1 if you have the <ustat.h> header file and it works.])
594 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
596 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
597 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
598 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
600 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)
602 AC_CHECK_TYPES([loff_t])
606 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
609 CFLAGS_hold="$CFLAGS"
610 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
612 LIBS="$LIBS $PTHREAD_LIBS"
613 AC_CHECK_FUNCS(sem_timedwait)
614 CFLAGS="$CFLAGS_hold"
618 LIBS="$LIBS $MATH_LIBS"
619 AC_CHECK_FUNCS(matherr)
622 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
623 [libgo_cv_func___sync_bool_compare_and_swap_4],
625 typedef unsigned int uint32 __attribute__ ((mode (SI)));
627 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
629 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
630 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
631 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
632 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
633 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
636 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
637 [libgo_cv_func___sync_bool_compare_and_swap_8],
639 typedef unsigned int uint64 __attribute__ ((mode (DI)));
641 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
643 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
644 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
645 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
646 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
647 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
650 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
651 [libgo_cv_func___sync_fetch_and_add_4],
653 typedef unsigned int uint32 __attribute__ ((mode (SI)));
655 int main() { return __sync_fetch_and_add (&i, 1); }
657 [libgo_cv_func___sync_fetch_and_add_4=yes],
658 [libgo_cv_func___sync_fetch_and_add_4=no])])
659 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
660 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
661 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
664 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
665 [libgo_cv_func___sync_add_and_fetch_8],
667 typedef unsigned int uint64 __attribute__ ((mode (DI)));
669 int main() { return __sync_add_and_fetch (&i, 1); }
671 [libgo_cv_func___sync_add_and_fetch_8=yes],
672 [libgo_cv_func___sync_add_and_fetch_8=no])])
673 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
674 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
675 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
678 dnl For x86 we want to use the -minline-all-stringops option to avoid
679 dnl forcing a stack split when calling memcpy and friends.
680 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
681 [libgo_cv_c_stringops],
683 CFLAGS="$CFLAGS -minline-all-stringops"
684 AC_COMPILE_IFELSE([int i;],
685 [libgo_cv_c_stringops=yes],
686 [libgo_cv_c_stringops=no])
687 CFLAGS=$CFLAGS_hold])
689 if test "$libgo_cv_c_stringops" = yes; then
690 STRINGOPS_FLAG=-minline-all-stringops
692 AC_SUBST(STRINGOPS_FLAG)
694 dnl For x86 we want to compile the math library with -mfancy-math-387
695 dnl -funsafe-math-optimizations so that we can use the builtin
696 dnl instructions directly.
697 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
698 [libgo_cv_c_fancymath],
700 CFLAGS="$CFLAGS -mfancy-math-387"
701 AC_COMPILE_IFELSE([int i;],
702 [libgo_cv_c_fancymath=yes],
703 [libgo_cv_c_fancymath=no])
704 CFLAGS=$CFLAGS_hold])
706 if test "$libgo_cv_c_fancymath" = yes; then
707 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
709 MATH_FLAG="-ffp-contract=off"
714 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
715 AC_CHECK_TYPES([off64_t])
718 dnl Work out the size of the epoll_events struct on GNU/Linux.
719 AC_CACHE_CHECK([epoll_event size],
720 [libgo_cv_c_epoll_event_size],
721 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
722 [sizeof (struct epoll_event)],
723 [#include <sys/epoll.h>],
724 [libgo_cv_c_epoll_event_size=0])])
725 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
726 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
728 dnl Work out the offset of the fd field in the epoll_events struct on
730 AC_CACHE_CHECK([epoll_event data.fd offset],
731 [libgo_cv_c_epoll_event_fd_offset],
732 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
733 [offsetof (struct epoll_event, data.fd)],
735 #include <sys/epoll.h>],
736 [libgo_cv_c_epoll_event_fd_offset=0])])
737 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
738 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
740 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
741 dnl in Solaris 12 for XPG7 compatibility.
742 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
743 [have_stat_timespec=yes], [have_stat_timespec=no])
744 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
746 dnl See if struct exception is defined in <math.h>.
747 AC_CHECK_TYPE([struct exception],
748 [libgo_has_struct_exception=yes],
749 [libgo_has_struct_exception=no],
751 if test "$libgo_has_struct_exception" = "yes"; then
752 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
753 [Define to 1 if <math.h> defines struct exception])
756 dnl See whether setcontext changes the value of TLS variables.
757 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
758 [libgo_cv_lib_setcontext_clobbers_tls],
759 [CFLAGS_hold="$CFLAGS"
760 CFLAGS="$PTHREAD_CFLAGS"
762 LIBS="$LIBS $PTHREAD_LIBS"
763 AC_CHECK_SIZEOF([void *])
764 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
769 #include <ucontext.h>
774 static char stack[[10 * 1024 * 1024]];
777 /* Called via makecontext/setcontext. */
785 /* Called via pthread_create. */
790 /* The thread should still see this value after calling
796 /* The call to setcontext should not return. */
805 /* The thread should not see this value. */
808 if (getcontext (&c) < 0)
811 c.uc_stack.ss_sp = stack;
812 #ifdef MAKECONTEXT_STACK_TOP
813 c.uc_stack.ss_sp += sizeof stack;
815 c.uc_stack.ss_flags = 0;
816 c.uc_stack.ss_size = sizeof stack;
818 makecontext (&c, cfn, 0);
820 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
823 if (pthread_join (tid, NULL) != 0)
826 /* The thread should have called exit. */
830 [libgo_cv_lib_setcontext_clobbers_tls=no],
831 [libgo_cv_lib_setcontext_clobbers_tls=yes],
832 [case "$target:$ptr_type_size" in
833 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
834 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
836 libgo_cv_lib_setcontext_clobbers_tls=no ;;
839 CFLAGS="$CFLAGS_hold"
842 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
843 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
844 [Define if setcontext clobbers TLS variables])
847 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
848 libgo_cv_ro_eh_frame, [
849 libgo_cv_ro_eh_frame=no
850 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
851 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
852 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
853 libgo_cv_ro_eh_frame=yes
854 elif grep '.section.*eh_frame.*#alloc' conftest.c \
855 | grep -v '#write' > /dev/null; then
856 libgo_cv_ro_eh_frame=yes
861 if test "x$libgo_cv_ro_eh_frame" = xyes; then
862 AC_DEFINE(EH_FRAME_FLAGS, "a",
863 [Define to the flags needed for the .section .eh_frame directive.])
865 AC_DEFINE(EH_FRAME_FLAGS, "aw",
866 [Define to the flags needed for the .section .eh_frame directive.])
869 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
870 [libgo_cv_c_unused_arguments],
872 CFLAGS="$CFLAGS -Qunused-arguments"
873 AC_COMPILE_IFELSE([[int i;]],
874 [libgo_cv_c_unused_arguments=yes],
875 [libgo_cv_c_unused_arguments=no])
876 CFLAGS=$CFLAGS_hold])
878 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
879 libgo_cv_as_comdat_gnu, [
880 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
882 if test "$libgo_cv_c_unused_arguments" = yes; then
883 CFLAGS="$CFLAGS -Qunused-arguments"
885 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
886 libgo_cv_as_comdat_gnu=yes
888 libgo_cv_as_comdat_gnu=no
892 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
893 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
894 [Define if your assembler supports GNU comdat group syntax.])
897 AC_CACHE_CHECK([assembler supports pc related relocs],
898 libgo_cv_as_x86_pcrel, [
899 libgo_cv_as_x86_pcrel=yes
900 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
902 if test "$libgo_cv_c_unused_arguments" = yes; then
903 CFLAGS="$CFLAGS -Qunused-arguments"
905 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
906 libgo_cv_as_x86_pcrel=no
910 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
911 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
912 [Define if your assembler supports PC relative relocs.])
915 AC_CACHE_CHECK([assembler supports unwind section type],
916 libgo_cv_as_x86_64_unwind_section_type, [
917 libgo_cv_as_x86_64_unwind_section_type=yes
918 echo '.section .eh_frame,"a",@unwind' > conftest.s
920 if test "$libgo_cv_c_unused_arguments" = yes; then
921 CFLAGS="$CFLAGS -Qunused-arguments"
923 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
924 libgo_cv_as_x86_64_unwind_section_type=no
928 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
929 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
930 [Define if your assembler supports unwind section type.])
935 if test ${multilib} = yes; then
936 multilib_arg="--enable-multilib"
941 AC_CONFIG_FILES(Makefile testsuite/Makefile)
943 AC_CONFIG_COMMANDS([default],
944 [if test -n "$CONFIG_FILES"; then
945 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
946 # that multilib installs will end up installed in the correct place.
947 # The testsuite needs it for multilib-aware ABI baseline files.
948 # To work around this not being passed down from config-ml.in ->
949 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
950 # append it here. Only modify Makefiles that have just been created.
952 # Also, get rid of this simulated-VPATH thing that automake does.
954 s!`test -f '$<' || echo '$(srcdir)/'`!!
956 for i in $SUBDIRS; do
957 case $CONFIG_FILES in
959 #echo "Adding MULTISUBDIR to $i/Makefile"
960 sed -f vpsed $i/Makefile > tmp
961 grep '^MULTISUBDIR =' Makefile >> tmp
970 # Variables needed in config.status (file generation) which aren't already
971 # passed by autoconf.