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 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
294 [AC_MSG_ERROR([unknown MIPS ABI])
295 [mips_abi="n32"]])])])
297 "o32") GOARCH=mips ;;
298 "n32") GOARCH=mips64p32 ;;
299 "n64") GOARCH=mips64 ;;
304 GOARCH_MINFRAMESIZE=4
308 GOARCH_MINFRAMESIZE=8
319 GOARCH_CACHELINESIZE=32
320 GOARCH_PHYSPAGESIZE=16384
323 rs6000*-*-* | powerpc*-*-*)
335 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
343 GOARCH_PHYSPAGESIZE=65536
345 GOARCH_MINFRAMESIZE=32
349 #if defined(__s390x__)
354 GOARCH_MINFRAMESIZE=4
357 GOARCH_MINFRAMESIZE=8
360 GOARCH_CACHELINESIZE=256
365 #if defined(__sparcv9) || defined(__arch64__)
372 GOARCH_FAMILY=SPARC64
375 GOARCH_PHYSPAGESIZE=8192
380 AC_SUBST(GOARCH_FAMILY)
381 AC_SUBST(GOARCH_BIGENDIAN)
382 AC_SUBST(GOARCH_CACHELINESIZE)
383 AC_SUBST(GOARCH_PHYSPAGESIZE)
384 AC_SUBST(GOARCH_PCQUANTUM)
385 AC_SUBST(GOARCH_INT64ALIGN)
386 AC_SUBST(GOARCH_HUGEPAGESIZE)
387 AC_SUBST(GOARCH_MINFRAMESIZE)
389 AC_SUBST(ALLGOARCHFAMILY)
391 dnl Some files are only present when needed for specific architectures.
393 GO_LIBCALL_OS_ARCH_FILE=
395 GO_SYSCALL_OS_ARCH_FILE=
396 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
397 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
399 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
400 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
402 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
403 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
405 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
406 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
408 AC_SUBST(GO_LIBCALL_OS_FILE)
409 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
410 AC_SUBST(GO_SYSCALL_OS_FILE)
411 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
413 dnl Special flags used to generate sysinfo.go.
414 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
417 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
418 # msghdr in <sys/socket.h>.
419 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
421 *-*-solaris2.1[[01]])
422 # Solaris 10+ needs this so struct msghdr gets the msg_control
423 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
424 # above doesn't work with C99.
425 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
430 dnl Check if assembler supports disabling hardware capability support.
431 GCC_CHECK_ASSEMBLER_HWCAP
433 dnl Use -fsplit-stack when compiling C code if available.
434 AC_CACHE_CHECK([whether -fsplit-stack is supported],
435 [libgo_cv_c_split_stack_supported],
437 CFLAGS="$CFLAGS -fsplit-stack"
438 AC_COMPILE_IFELSE([[int i;]],
439 [libgo_cv_c_split_stack_supported=yes],
440 [libgo_cv_c_split_stack_supported=no])
441 CFLAGS=$CFLAGS_hold])
443 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
444 dnl reject split-stack code calling non-split-stack code on targets
445 dnl they don't support.
446 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
447 [libgo_cv_c_linker_split_non_split],
448 [cat > conftest1.c << EOF
450 int main() { f(); return 0; }
452 cat > conftest2.c << EOF
455 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
456 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
457 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
458 libgo_cv_c_linker_split_non_split=yes
460 libgo_cv_c_linker_split_non_split=no
462 rm -f conftest1.* conftest2.* conftest])
464 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
465 SPLIT_STACK=-fsplit-stack
466 AC_DEFINE(USING_SPLIT_STACK, 1,
467 [Define if the compiler supports -fsplit-stack])
471 AC_SUBST(SPLIT_STACK)
472 AM_CONDITIONAL(USING_SPLIT_STACK,
473 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
475 dnl If the compiler supports split-stack but the linker does not, then
476 dnl we need to explicitly disable split-stack for Go.
477 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
478 GO_SPLIT_STACK=-fno-split-stack
482 AC_SUBST(GO_SPLIT_STACK)
484 dnl Check whether the linker does stack munging when calling from
485 dnl split-stack into non-split-stack code. We check this by looking
486 dnl at the --help output. FIXME: This is only half right: it's
487 dnl possible for the linker to support this for some targets but not
489 dnl This is slightly different from the above check, which is whether
490 dnl the linker permits the call at all.
491 AC_CACHE_CHECK([whether linker supports split stack],
492 [libgo_cv_c_linker_supports_split_stack],
493 [libgo_cv_c_linker_supports_split_stack=no
494 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
495 libgo_cv_c_linker_supports_split_stack=yes
497 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
498 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
499 [Define if the linker support split stack adjustments])
502 AC_CACHE_CHECK([whether compiler is llgo],
503 [libgo_cv_c_goc_is_llgo],
504 [libgo_cv_c_goc_is_llgo=no
505 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
506 libgo_cv_c_goc_is_llgo=yes
508 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
510 dnl Test for the -lm library.
512 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
515 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
516 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
517 [libgo_cv_lib_sockets=
519 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
520 if test "$libgo_check_socket" = "yes"; then
521 unset ac_cv_func_connect
522 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
523 libgo_check_both=yes)
525 if test "$libgo_check_both" = "yes"; then
527 LIBS="$LIBS -lsocket -lnsl"
528 unset ac_cv_func_accept
529 AC_CHECK_FUNC(accept,
531 libgo_cv_lib_sockets="-lsocket -lnsl"])
532 unset ac_cv_func_accept
535 unset ac_cv_func_gethostbyname
536 libgo_old_libs="$LIBS"
537 AC_CHECK_FUNC(gethostbyname, ,
538 [AC_CHECK_LIB(nsl, main,
539 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
540 unset ac_cv_func_gethostbyname
541 AC_CHECK_FUNC(sendfile, ,
542 [AC_CHECK_LIB(sendfile, main,
543 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
546 NET_LIBS="$libgo_cv_lib_sockets"
549 dnl Test whether the compiler supports the -pthread option.
550 AC_CACHE_CHECK([whether -pthread is supported],
551 [libgo_cv_lib_pthread],
553 CFLAGS="$CFLAGS -pthread"
554 AC_COMPILE_IFELSE([[int i;]],
555 [libgo_cv_lib_pthread=yes],
556 [libgo_cv_lib_pthread=no])
557 CFLAGS=$CFLAGS_hold])
559 if test "$libgo_cv_lib_pthread" = yes; then
560 PTHREAD_CFLAGS=-pthread
562 AC_SUBST(PTHREAD_CFLAGS)
564 dnl Test for the -lpthread library.
566 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
567 AC_SUBST(PTHREAD_LIBS)
569 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
570 AC_SEARCH_LIBS([sched_yield], [rt])
571 AC_SEARCH_LIBS([nanosleep], [rt])
572 AC_SEARCH_LIBS([clock_gettime], [rt])
576 GCC_CHECK_UNWIND_GETIPINFO
578 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/icmp6.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
580 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
581 [#ifdef HAVE_SYS_SOCKET_H
582 #include <sys/socket.h>
586 AC_CACHE_CHECK([whether <ustat.h> can be used],
587 [libgo_cv_c_ustat_h],
589 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
592 #include <sys/types.h>
593 #ifdef HAVE_LINUX_FILTER_H
594 #include <linux/filter.h>
597 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
598 CFLAGS=$CFLAGS_hold])
599 if test $libgo_cv_c_ustat_h = yes; then
600 AC_DEFINE(HAVE_USTAT_H, 1,
601 [Define to 1 if you have the <ustat.h> header file and it works.])
604 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
606 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
607 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
608 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
610 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)
612 AC_CHECK_TYPES([loff_t])
616 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
619 CFLAGS_hold="$CFLAGS"
620 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
622 LIBS="$LIBS $PTHREAD_LIBS"
623 AC_CHECK_FUNCS(sem_timedwait)
624 CFLAGS="$CFLAGS_hold"
628 LIBS="$LIBS $MATH_LIBS"
629 AC_CHECK_FUNCS(matherr)
632 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
633 [libgo_cv_func___sync_bool_compare_and_swap_4],
635 typedef unsigned int uint32 __attribute__ ((mode (SI)));
637 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
639 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
640 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
641 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
642 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
643 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
646 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
647 [libgo_cv_func___sync_bool_compare_and_swap_8],
649 typedef unsigned int uint64 __attribute__ ((mode (DI)));
651 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
653 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
654 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
655 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
656 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
657 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
660 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
661 [libgo_cv_func___sync_fetch_and_add_4],
663 typedef unsigned int uint32 __attribute__ ((mode (SI)));
665 int main() { return __sync_fetch_and_add (&i, 1); }
667 [libgo_cv_func___sync_fetch_and_add_4=yes],
668 [libgo_cv_func___sync_fetch_and_add_4=no])])
669 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
670 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
671 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
674 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
675 [libgo_cv_func___sync_add_and_fetch_8],
677 typedef unsigned int uint64 __attribute__ ((mode (DI)));
679 int main() { return __sync_add_and_fetch (&i, 1); }
681 [libgo_cv_func___sync_add_and_fetch_8=yes],
682 [libgo_cv_func___sync_add_and_fetch_8=no])])
683 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
684 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
685 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
688 dnl For x86 we want to use the -minline-all-stringops option to avoid
689 dnl forcing a stack split when calling memcpy and friends.
690 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
691 [libgo_cv_c_stringops],
693 CFLAGS="$CFLAGS -minline-all-stringops"
694 AC_COMPILE_IFELSE([int i;],
695 [libgo_cv_c_stringops=yes],
696 [libgo_cv_c_stringops=no])
697 CFLAGS=$CFLAGS_hold])
699 if test "$libgo_cv_c_stringops" = yes; then
700 STRINGOPS_FLAG=-minline-all-stringops
702 AC_SUBST(STRINGOPS_FLAG)
704 dnl For x86 we want to compile the math library with -mfancy-math-387
705 dnl -funsafe-math-optimizations so that we can use the builtin
706 dnl instructions directly.
707 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
708 [libgo_cv_c_fancymath],
710 CFLAGS="$CFLAGS -mfancy-math-387"
711 AC_COMPILE_IFELSE([int i;],
712 [libgo_cv_c_fancymath=yes],
713 [libgo_cv_c_fancymath=no])
714 CFLAGS=$CFLAGS_hold])
716 if test "$libgo_cv_c_fancymath" = yes; then
717 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
719 MATH_FLAG="-ffp-contract=off"
724 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
725 AC_CHECK_TYPES([off64_t])
728 dnl Work out the size of the epoll_events struct on GNU/Linux.
729 AC_CACHE_CHECK([epoll_event size],
730 [libgo_cv_c_epoll_event_size],
731 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
732 [sizeof (struct epoll_event)],
733 [#include <sys/epoll.h>],
734 [libgo_cv_c_epoll_event_size=0])])
735 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
736 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
738 dnl Work out the offset of the fd field in the epoll_events struct on
740 AC_CACHE_CHECK([epoll_event data.fd offset],
741 [libgo_cv_c_epoll_event_fd_offset],
742 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
743 [offsetof (struct epoll_event, data.fd)],
745 #include <sys/epoll.h>],
746 [libgo_cv_c_epoll_event_fd_offset=0])])
747 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
748 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
750 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
751 dnl in Solaris 12 for XPG7 compatibility.
752 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
753 [have_stat_timespec=yes], [have_stat_timespec=no])
754 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
756 dnl See if struct exception is defined in <math.h>.
757 AC_CHECK_TYPE([struct exception],
758 [libgo_has_struct_exception=yes],
759 [libgo_has_struct_exception=no],
761 if test "$libgo_has_struct_exception" = "yes"; then
762 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
763 [Define to 1 if <math.h> defines struct exception])
766 dnl See whether setcontext changes the value of TLS variables.
767 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
768 [libgo_cv_lib_setcontext_clobbers_tls],
769 [CFLAGS_hold="$CFLAGS"
770 CFLAGS="$PTHREAD_CFLAGS"
772 LIBS="$LIBS $PTHREAD_LIBS"
773 AC_CHECK_SIZEOF([void *])
774 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
779 #include <ucontext.h>
784 static char stack[[10 * 1024 * 1024]];
787 /* Called via makecontext/setcontext. */
795 /* Called via pthread_create. */
800 /* The thread should still see this value after calling
806 /* The call to setcontext should not return. */
815 /* The thread should not see this value. */
818 if (getcontext (&c) < 0)
821 c.uc_stack.ss_sp = stack;
822 #ifdef MAKECONTEXT_STACK_TOP
823 c.uc_stack.ss_sp += sizeof stack;
825 c.uc_stack.ss_flags = 0;
826 c.uc_stack.ss_size = sizeof stack;
828 makecontext (&c, cfn, 0);
830 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
833 if (pthread_join (tid, NULL) != 0)
836 /* The thread should have called exit. */
840 [libgo_cv_lib_setcontext_clobbers_tls=no],
841 [libgo_cv_lib_setcontext_clobbers_tls=yes],
842 [case "$target:$ptr_type_size" in
843 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
844 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
846 libgo_cv_lib_setcontext_clobbers_tls=no ;;
849 CFLAGS="$CFLAGS_hold"
852 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
853 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
854 [Define if setcontext clobbers TLS variables])
857 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
858 libgo_cv_ro_eh_frame, [
859 libgo_cv_ro_eh_frame=no
860 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
861 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
862 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
863 libgo_cv_ro_eh_frame=yes
864 elif grep '.section.*eh_frame.*#alloc' conftest.c \
865 | grep -v '#write' > /dev/null; then
866 libgo_cv_ro_eh_frame=yes
871 if test "x$libgo_cv_ro_eh_frame" = xyes; then
872 AC_DEFINE(EH_FRAME_FLAGS, "a",
873 [Define to the flags needed for the .section .eh_frame directive.])
875 AC_DEFINE(EH_FRAME_FLAGS, "aw",
876 [Define to the flags needed for the .section .eh_frame directive.])
879 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
880 [libgo_cv_c_unused_arguments],
882 CFLAGS="$CFLAGS -Qunused-arguments"
883 AC_COMPILE_IFELSE([[int i;]],
884 [libgo_cv_c_unused_arguments=yes],
885 [libgo_cv_c_unused_arguments=no])
886 CFLAGS=$CFLAGS_hold])
888 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
889 libgo_cv_as_comdat_gnu, [
890 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
892 if test "$libgo_cv_c_unused_arguments" = yes; then
893 CFLAGS="$CFLAGS -Qunused-arguments"
895 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
896 libgo_cv_as_comdat_gnu=yes
898 libgo_cv_as_comdat_gnu=no
902 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
903 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
904 [Define if your assembler supports GNU comdat group syntax.])
907 AC_CACHE_CHECK([assembler supports pc related relocs],
908 libgo_cv_as_x86_pcrel, [
909 libgo_cv_as_x86_pcrel=yes
910 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
912 if test "$libgo_cv_c_unused_arguments" = yes; then
913 CFLAGS="$CFLAGS -Qunused-arguments"
915 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
916 libgo_cv_as_x86_pcrel=no
920 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
921 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
922 [Define if your assembler supports PC relative relocs.])
925 AC_CACHE_CHECK([assembler supports unwind section type],
926 libgo_cv_as_x86_64_unwind_section_type, [
927 libgo_cv_as_x86_64_unwind_section_type=yes
928 echo '.section .eh_frame,"a",@unwind' > conftest.s
930 if test "$libgo_cv_c_unused_arguments" = yes; then
931 CFLAGS="$CFLAGS -Qunused-arguments"
933 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
934 libgo_cv_as_x86_64_unwind_section_type=no
938 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
939 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
940 [Define if your assembler supports unwind section type.])
943 AC_CACHE_CHECK([assembler supports AES instructions],
944 libgo_cv_as_x86_aes, [
945 libgo_cv_as_x86_aes=yes
946 echo 'aesenc %xmm0, %xmm1' > conftest.s
948 if test "$libgo_cv_c_unused_arguments" = yes; then
949 CFLAGS="$CFLAGS -Qunused-arguments"
951 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
952 libgo_cv_as_x86_aes=no
956 if test "x$libgo_cv_as_x86_aes" = xyes; then
957 AC_DEFINE(HAVE_AS_X86_AES, 1,
958 [Define if your assembler supports AES instructions.])
963 if test ${multilib} = yes; then
964 multilib_arg="--enable-multilib"
969 AC_CONFIG_FILES(Makefile testsuite/Makefile)
971 AC_CONFIG_COMMANDS([default],
972 [if test -n "$CONFIG_FILES"; then
973 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
974 # that multilib installs will end up installed in the correct place.
975 # The testsuite needs it for multilib-aware ABI baseline files.
976 # To work around this not being passed down from config-ml.in ->
977 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
978 # append it here. Only modify Makefiles that have just been created.
980 # Also, get rid of this simulated-VPATH thing that automake does.
982 s!`test -f '$<' || echo '$(srcdir)/'`!!
984 for i in $SUBDIRS; do
985 case $CONFIG_FILES in
987 #echo "Adding MULTISUBDIR to $i/Makefile"
988 sed -f vpsed $i/Makefile > tmp
989 grep '^MULTISUBDIR =' Makefile >> tmp
998 # Variables needed in config.status (file generation) which aren't already
999 # passed by autoconf.