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 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
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
371 #if defined(__sparcv9) || defined(__arch64__)
378 GOARCH_FAMILY=SPARC64
380 GOARCH_BIGENDIAN=true
381 GOARCH_PHYSPAGESIZE=8192
386 AC_SUBST(GOARCH_FAMILY)
387 AC_SUBST(GOARCH_BIGENDIAN)
388 AC_SUBST(GOARCH_CACHELINESIZE)
389 AC_SUBST(GOARCH_PHYSPAGESIZE)
390 AC_SUBST(GOARCH_PCQUANTUM)
391 AC_SUBST(GOARCH_INT64ALIGN)
392 AC_SUBST(GOARCH_HUGEPAGESIZE)
393 AC_SUBST(GOARCH_MINFRAMESIZE)
395 AC_SUBST(ALLGOARCHFAMILY)
397 dnl Some files are only present when needed for specific architectures.
399 GO_LIBCALL_OS_ARCH_FILE=
401 GO_SYSCALL_OS_ARCH_FILE=
402 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
403 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
405 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
406 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
408 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
409 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
411 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
412 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
414 AC_SUBST(GO_LIBCALL_OS_FILE)
415 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
416 AC_SUBST(GO_SYSCALL_OS_FILE)
417 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
419 dnl Special flags used to generate sysinfo.go.
420 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
423 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
424 # msghdr in <sys/socket.h>.
425 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
427 *-*-solaris2.1[[01]])
428 # Solaris 10+ needs this so struct msghdr gets the msg_control
429 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
430 # above doesn't work with C99.
431 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
436 dnl Check if assembler supports disabling hardware capability support.
437 GCC_CHECK_ASSEMBLER_HWCAP
439 dnl Use -fsplit-stack when compiling C code if available.
440 AC_CACHE_CHECK([whether -fsplit-stack is supported],
441 [libgo_cv_c_split_stack_supported],
443 CFLAGS="$CFLAGS -fsplit-stack"
444 AC_COMPILE_IFELSE([[int i;]],
445 [libgo_cv_c_split_stack_supported=yes],
446 [libgo_cv_c_split_stack_supported=no])
447 CFLAGS=$CFLAGS_hold])
449 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
450 dnl reject split-stack code calling non-split-stack code on targets
451 dnl they don't support.
452 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
453 [libgo_cv_c_linker_split_non_split],
454 [cat > conftest1.c << EOF
456 int main() { f(); return 0; }
458 cat > conftest2.c << EOF
461 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
462 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
463 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
464 libgo_cv_c_linker_split_non_split=yes
466 libgo_cv_c_linker_split_non_split=no
468 rm -f conftest1.* conftest2.* conftest])
470 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
471 SPLIT_STACK=-fsplit-stack
472 AC_DEFINE(USING_SPLIT_STACK, 1,
473 [Define if the compiler supports -fsplit-stack])
477 AC_SUBST(SPLIT_STACK)
478 AM_CONDITIONAL(USING_SPLIT_STACK,
479 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
481 dnl If the compiler supports split-stack but the linker does not, then
482 dnl we need to explicitly disable split-stack for Go.
483 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
484 GO_SPLIT_STACK=-fno-split-stack
488 AC_SUBST(GO_SPLIT_STACK)
490 dnl Check whether the linker does stack munging when calling from
491 dnl split-stack into non-split-stack code. We check this by looking
492 dnl at the --help output. FIXME: This is only half right: it's
493 dnl possible for the linker to support this for some targets but not
495 dnl This is slightly different from the above check, which is whether
496 dnl the linker permits the call at all.
497 AC_CACHE_CHECK([whether linker supports split stack],
498 [libgo_cv_c_linker_supports_split_stack],
499 [libgo_cv_c_linker_supports_split_stack=no
500 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
501 libgo_cv_c_linker_supports_split_stack=yes
503 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
504 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
505 [Define if the linker support split stack adjustments])
508 AC_CACHE_CHECK([whether compiler is llgo],
509 [libgo_cv_c_goc_is_llgo],
510 [libgo_cv_c_goc_is_llgo=no
511 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
512 libgo_cv_c_goc_is_llgo=yes
514 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
516 dnl Test for the -lm library.
518 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
521 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
522 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
523 [libgo_cv_lib_sockets=
525 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
526 if test "$libgo_check_socket" = "yes"; then
527 unset ac_cv_func_connect
528 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
529 libgo_check_both=yes)
531 if test "$libgo_check_both" = "yes"; then
533 LIBS="$LIBS -lsocket -lnsl"
534 unset ac_cv_func_accept
535 AC_CHECK_FUNC(accept,
537 libgo_cv_lib_sockets="-lsocket -lnsl"])
538 unset ac_cv_func_accept
541 unset ac_cv_func_gethostbyname
542 libgo_old_libs="$LIBS"
543 AC_CHECK_FUNC(gethostbyname, ,
544 [AC_CHECK_LIB(nsl, main,
545 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
546 unset ac_cv_func_gethostbyname
547 AC_CHECK_FUNC(sendfile, ,
548 [AC_CHECK_LIB(sendfile, main,
549 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
552 NET_LIBS="$libgo_cv_lib_sockets"
555 dnl Test whether the compiler supports the -pthread option.
556 AC_CACHE_CHECK([whether -pthread is supported],
557 [libgo_cv_lib_pthread],
559 CFLAGS="$CFLAGS -pthread"
560 AC_COMPILE_IFELSE([[int i;]],
561 [libgo_cv_lib_pthread=yes],
562 [libgo_cv_lib_pthread=no])
563 CFLAGS=$CFLAGS_hold])
565 if test "$libgo_cv_lib_pthread" = yes; then
566 PTHREAD_CFLAGS=-pthread
568 AC_SUBST(PTHREAD_CFLAGS)
570 dnl Test for the -lpthread library.
572 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
573 AC_SUBST(PTHREAD_LIBS)
575 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
576 AC_SEARCH_LIBS([sched_yield], [rt])
577 AC_SEARCH_LIBS([nanosleep], [rt])
578 AC_SEARCH_LIBS([clock_gettime], [rt])
582 GCC_CHECK_UNWIND_GETIPINFO
584 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)
586 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
587 [#include <netinet/in.h>
590 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
591 [#ifdef HAVE_SYS_SOCKET_H
592 #include <sys/socket.h>
596 AC_CACHE_CHECK([whether <ustat.h> can be used],
597 [libgo_cv_c_ustat_h],
599 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
602 #include <sys/types.h>
603 #ifdef HAVE_LINUX_FILTER_H
604 #include <linux/filter.h>
607 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
608 CFLAGS=$CFLAGS_hold])
609 if test $libgo_cv_c_ustat_h = yes; then
610 AC_DEFINE(HAVE_USTAT_H, 1,
611 [Define to 1 if you have the <ustat.h> header file and it works.])
614 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
616 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
617 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
618 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
620 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)
622 AC_CHECK_TYPES([loff_t])
626 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
629 CFLAGS_hold="$CFLAGS"
630 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
632 LIBS="$LIBS $PTHREAD_LIBS"
633 AC_CHECK_FUNCS(sem_timedwait)
634 CFLAGS="$CFLAGS_hold"
638 LIBS="$LIBS $MATH_LIBS"
639 AC_CHECK_FUNCS(matherr)
642 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
643 [libgo_cv_func___sync_bool_compare_and_swap_4],
645 typedef unsigned int uint32 __attribute__ ((mode (SI)));
647 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
649 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
650 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
651 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
652 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
653 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
656 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
657 [libgo_cv_func___sync_bool_compare_and_swap_8],
659 typedef unsigned int uint64 __attribute__ ((mode (DI)));
661 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
663 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
664 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
665 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
666 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
667 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
670 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
671 [libgo_cv_func___sync_fetch_and_add_4],
673 typedef unsigned int uint32 __attribute__ ((mode (SI)));
675 int main() { return __sync_fetch_and_add (&i, 1); }
677 [libgo_cv_func___sync_fetch_and_add_4=yes],
678 [libgo_cv_func___sync_fetch_and_add_4=no])])
679 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
680 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
681 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
684 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
685 [libgo_cv_func___sync_add_and_fetch_8],
687 typedef unsigned int uint64 __attribute__ ((mode (DI)));
689 int main() { return __sync_add_and_fetch (&i, 1); }
691 [libgo_cv_func___sync_add_and_fetch_8=yes],
692 [libgo_cv_func___sync_add_and_fetch_8=no])])
693 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
694 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
695 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
698 dnl For x86 we want to use the -minline-all-stringops option to avoid
699 dnl forcing a stack split when calling memcpy and friends.
700 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
701 [libgo_cv_c_stringops],
703 CFLAGS="$CFLAGS -minline-all-stringops"
704 AC_COMPILE_IFELSE([int i;],
705 [libgo_cv_c_stringops=yes],
706 [libgo_cv_c_stringops=no])
707 CFLAGS=$CFLAGS_hold])
709 if test "$libgo_cv_c_stringops" = yes; then
710 STRINGOPS_FLAG=-minline-all-stringops
712 AC_SUBST(STRINGOPS_FLAG)
714 dnl For x86 we want to compile the math library with -mfancy-math-387
715 dnl -funsafe-math-optimizations so that we can use the builtin
716 dnl instructions directly.
717 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
718 [libgo_cv_c_fancymath],
720 CFLAGS="$CFLAGS -mfancy-math-387"
721 AC_COMPILE_IFELSE([int i;],
722 [libgo_cv_c_fancymath=yes],
723 [libgo_cv_c_fancymath=no])
724 CFLAGS=$CFLAGS_hold])
726 if test "$libgo_cv_c_fancymath" = yes; then
727 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations -fno-math-errno"
729 MATH_FLAG="-ffp-contract=off"
734 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
735 AC_CHECK_TYPES([off64_t])
738 dnl Work out the size of the epoll_events struct on GNU/Linux.
739 AC_CACHE_CHECK([epoll_event size],
740 [libgo_cv_c_epoll_event_size],
741 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
742 [sizeof (struct epoll_event)],
743 [#include <sys/epoll.h>],
744 [libgo_cv_c_epoll_event_size=0])])
745 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
746 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
748 dnl Work out the offset of the fd field in the epoll_events struct on
750 AC_CACHE_CHECK([epoll_event data.fd offset],
751 [libgo_cv_c_epoll_event_fd_offset],
752 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
753 [offsetof (struct epoll_event, data.fd)],
755 #include <sys/epoll.h>],
756 [libgo_cv_c_epoll_event_fd_offset=0])])
757 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
758 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
760 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
761 dnl in Solaris 11.4 for XPG7 compatibility.
762 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
763 [have_stat_timespec=yes], [have_stat_timespec=no])
764 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
766 dnl See if struct exception is defined in <math.h>.
767 AC_CHECK_TYPE([struct exception],
768 [libgo_has_struct_exception=yes],
769 [libgo_has_struct_exception=no],
771 if test "$libgo_has_struct_exception" = "yes"; then
772 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
773 [Define to 1 if <math.h> defines struct exception])
776 dnl See whether setcontext changes the value of TLS variables.
777 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
778 [libgo_cv_lib_setcontext_clobbers_tls],
779 [CFLAGS_hold="$CFLAGS"
780 CFLAGS="$PTHREAD_CFLAGS"
782 LIBS="$LIBS $PTHREAD_LIBS"
783 AC_CHECK_SIZEOF([void *])
784 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
789 #include <ucontext.h>
794 static char stack[[10 * 1024 * 1024]];
797 /* Called via makecontext/setcontext. */
805 /* Called via pthread_create. */
810 /* The thread should still see this value after calling
816 /* The call to setcontext should not return. */
825 /* The thread should not see this value. */
828 if (getcontext (&c) < 0)
831 c.uc_stack.ss_sp = stack;
832 #ifdef MAKECONTEXT_STACK_TOP
833 c.uc_stack.ss_sp += sizeof stack;
835 c.uc_stack.ss_flags = 0;
836 c.uc_stack.ss_size = sizeof stack;
838 makecontext (&c, cfn, 0);
840 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
843 if (pthread_join (tid, NULL) != 0)
846 /* The thread should have called exit. */
850 [libgo_cv_lib_setcontext_clobbers_tls=no],
851 [libgo_cv_lib_setcontext_clobbers_tls=yes],
852 [case "$target:$ptr_type_size" in
853 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
854 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
856 libgo_cv_lib_setcontext_clobbers_tls=no ;;
859 CFLAGS="$CFLAGS_hold"
862 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
863 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
864 [Define if setcontext clobbers TLS variables])
867 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
868 libgo_cv_ro_eh_frame, [
869 libgo_cv_ro_eh_frame=no
870 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
871 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
872 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
873 libgo_cv_ro_eh_frame=yes
874 elif grep '.section.*eh_frame.*#alloc' conftest.c \
875 | grep -v '#write' > /dev/null; then
876 libgo_cv_ro_eh_frame=yes
881 if test "x$libgo_cv_ro_eh_frame" = xyes; then
882 AC_DEFINE(EH_FRAME_FLAGS, "a",
883 [Define to the flags needed for the .section .eh_frame directive.])
885 AC_DEFINE(EH_FRAME_FLAGS, "aw",
886 [Define to the flags needed for the .section .eh_frame directive.])
889 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
890 [libgo_cv_c_unused_arguments],
892 CFLAGS="$CFLAGS -Qunused-arguments"
893 AC_COMPILE_IFELSE([[int i;]],
894 [libgo_cv_c_unused_arguments=yes],
895 [libgo_cv_c_unused_arguments=no])
896 CFLAGS=$CFLAGS_hold])
898 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
899 libgo_cv_as_comdat_gnu, [
900 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
902 if test "$libgo_cv_c_unused_arguments" = yes; then
903 CFLAGS="$CFLAGS -Qunused-arguments"
905 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
906 libgo_cv_as_comdat_gnu=yes
908 libgo_cv_as_comdat_gnu=no
912 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
913 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
914 [Define if your assembler supports GNU comdat group syntax.])
917 AC_CACHE_CHECK([assembler supports pc related relocs],
918 libgo_cv_as_x86_pcrel, [
919 libgo_cv_as_x86_pcrel=yes
920 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
922 if test "$libgo_cv_c_unused_arguments" = yes; then
923 CFLAGS="$CFLAGS -Qunused-arguments"
925 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
926 libgo_cv_as_x86_pcrel=no
930 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
931 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
932 [Define if your assembler supports PC relative relocs.])
935 AC_CACHE_CHECK([assembler supports unwind section type],
936 libgo_cv_as_x86_64_unwind_section_type, [
937 libgo_cv_as_x86_64_unwind_section_type=yes
938 echo '.section .eh_frame,"a",@unwind' > conftest.s
940 if test "$libgo_cv_c_unused_arguments" = yes; then
941 CFLAGS="$CFLAGS -Qunused-arguments"
943 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
944 libgo_cv_as_x86_64_unwind_section_type=no
948 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
949 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
950 [Define if your assembler supports unwind section type.])
953 AC_CACHE_CHECK([assembler supports AES instructions],
954 libgo_cv_as_x86_aes, [
955 libgo_cv_as_x86_aes=yes
956 echo 'aesenc %xmm0, %xmm1' > conftest.s
958 if test "$libgo_cv_c_unused_arguments" = yes; then
959 CFLAGS="$CFLAGS -Qunused-arguments"
961 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
962 libgo_cv_as_x86_aes=no
966 if test "x$libgo_cv_as_x86_aes" = xyes; then
967 AC_DEFINE(HAVE_AS_X86_AES, 1,
968 [Define if your assembler supports AES instructions.])
973 if test ${multilib} = yes; then
974 multilib_arg="--enable-multilib"
979 AC_CONFIG_FILES(Makefile testsuite/Makefile)
981 AC_CONFIG_COMMANDS([default],
982 [if test -n "$CONFIG_FILES"; then
983 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
984 # that multilib installs will end up installed in the correct place.
985 # The testsuite needs it for multilib-aware ABI baseline files.
986 # To work around this not being passed down from config-ml.in ->
987 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
988 # append it here. Only modify Makefiles that have just been created.
990 # Also, get rid of this simulated-VPATH thing that automake does.
992 s!`test -f '$<' || echo '$(srcdir)/'`!!
994 for i in $SUBDIRS; do
995 case $CONFIG_FILES in
997 #echo "Adding MULTISUBDIR to $i/Makefile"
998 sed -f vpsed $i/Makefile > tmp
999 grep '^MULTISUBDIR =' Makefile >> tmp
1008 # Variables needed in config.status (file generation) which aren't already
1009 # passed by autoconf.