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# configure.ac -- Go library configure script.

# Copyright 2009 The Go Authors. All rights reserved.

# Use of this source code is governed by a BSD-style

# license that can be found in the LICENSE file.

# Process this file with autoreconf to produce configure.

AC_PREREQ(2.64)

AC_INIT(package-unused, version-unused,, libgo)

AC_CONFIG_SRCDIR(Makefile.am)

AC_CONFIG_HEADER(config.h)

libtool_VERSION=1:0:0

AC_SUBST(libtool_VERSION)

AM_ENABLE_MULTILIB(, ..)

AC_CANONICAL_SYSTEM

target_alias=${target_alias-$host_alias}

AM_INIT_AUTOMAKE([1.9.3 no-define foreign -Wall])

AH_TEMPLATE(PACKAGE, [Name of package])

AH_TEMPLATE(VERSION, [Version number of package])

m4_rename([_AC_ARG_VAR_PRECIOUS],[glibgo_PRECIOUS])

m4_define([_AC_ARG_VAR_PRECIOUS],[])

AC_PROG_CC

AC_PROG_GO

m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])

AC_SUBST(CFLAGS)

AM_MAINTAINER_MODE

AC_PROG_LD

AC_PROG_RANLIB

AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)

AC_LIBTOOL_DLOPEN

AM_PROG_LIBTOOL

AC_SUBST(enable_shared)

AC_SUBST(enable_static)

CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}

AC_SUBST(CC_FOR_BUILD)

AC_PROG_AWK

WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'

AC_SUBST(WARN_FLAGS)

dnl FIXME: This should be controlled by --enable-maintainer-mode.

WERROR="-Werror"

AC_SUBST(WERROR)

glibgo_toolexecdir=no

glibgo_toolexeclibdir=no

AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])

AC_ARG_ENABLE([version-specific-runtime-libs],

  AC_HELP_STRING([--enable-version-specific-runtime-libs],

                 [Specify that runtime libraries should be installed in a compiler-specific directory]),

  [case "$enableval" in

    yes) version_specific_libs=yes ;;

    no)  version_specific_libs=no ;;

    *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;

   esac],

  [version_specific_libs=no])

AC_MSG_RESULT($version_specific_libs)

# Version-specific runtime libs processing.

if test $version_specific_libs = yes; then

  glibgo_toolexecdir='${libdir}/gcc/${host_alias}'

  glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'

fi

# Calculate glibgo_toolexecdir, glibgo_toolexeclibdir

# Install a library built with a cross compiler in tooldir, not libdir.

if test -n "$with_cross_host" &&

   test x"$with_cross_host" != x"no"; then

  nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'

  nover_glibgo_toolexeclibdir='${toolexecdir}/lib'

else

  nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'

  nover_glibgo_toolexeclibdir='${libdir}'

fi

multi_os_directory=`$CC -print-multi-os-directory`

case $multi_os_directory in

  .) ;; # Avoid trailing /.

  *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;

esac

if test x"$glibgo_toolexecdir" = x"no"; then

  glibgo_toolexecdir="${nover_glibgo_toolexecdir}"

  glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"

fi

AC_SUBST(glibgo_toolexecdir)

AC_SUBST(glibgo_toolexeclibdir)

AC_SUBST(nover_glibgo_toolexeclibdir)

# See if the user wants to configure without libffi.  Some

# architectures don't support it.  FIXME: We should set a default

# based on the host.

AC_ARG_WITH(libffi,

  AS_HELP_STRING([--without-libffi],

                 [don't use libffi]),

  [:],

  [with_libffi=${with_libffi_default-yes}])

LIBFFI=

LIBFFIINCS=

if test "$with_libffi" != no; then

   AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])

   LIBFFI=../libffi/libffi_convenience.la

   LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'

fi

AC_SUBST(LIBFFI)

AC_SUBST(LIBFFIINCS)

# Used to tell GNU make to include a file without telling automake to

# include it.

go_include="-include"

AC_SUBST(go_include)

is_darwin=no

is_freebsd=no

is_irix=no

is_linux=no

is_netbsd=no

is_rtems=no

is_solaris=no

GOOS=unknown

case ${host} in

  *-*-darwin*)   is_darwin=yes;  GOOS=darwin ;;

  *-*-freebsd*)  is_freebsd=yes; GOOS=freebsd ;;

  *-*-irix6*)    is_irix=yes;    GOOS=irix ;;

  *-*-linux*)    is_linux=yes;   GOOS=linux ;;

  *-*-netbsd*)   is_netbsd=yes;  GOOS=netbsd ;;

  *-*-rtems*)    is_rtems=yes;   GOOS=rtems ;;

  *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;

esac

AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)

AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)

AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)

AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)

AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)

AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)

AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)

AC_SUBST(GOOS)

dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).

is_386=no

is_alpha=no

is_arm=no

is_m68k=no

mips_abi=unknown

is_ppc=no

is_ppc64=no

is_sparc=no

is_sparc64=no

is_x86_64=no

GOARCH=unknown

case ${host} in

  alpha*-*-*)

    is_alpha=yes

    GOARCH=alpha

    ;;

  arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)

    is_arm=yes

    GOARCH=arm

    ;;

changequote(,)dnl

  i[34567]86-*-* | x86_64-*-*)

changequote([,])dnl

    AC_COMPILE_IFELSE([

#ifdef __x86_64__

#error 64-bit

#endif],

[is_386=yes], [is_x86_64=yes])

    if test "$is_386" = "yes"; then

      GOARCH=386

    else

      GOARCH=amd64

    fi

    ;;

  m68k*-*-*)

    is_m68k=yes

    GOARCH=m68k

    ;;

  mips*-*-*)

    AC_COMPILE_IFELSE([

#if _MIPS_SIM != _ABIO32

#error not o32

#endif],

[mips_abi="o32"],

        [AC_COMPILE_IFELSE([

#if _MIPS_SIM != _ABIN32

#error not n32

#endif],

[mips_abi="n32"],

        [AC_COMPILE_IFELSE([

#if _MIPS_SIM != _ABI64

#error not n64

#endif],

[mips_abi="n64"],

        [AC_COMPILE_IFELSE([

#if _MIPS_SIM != _ABIO64

#error not o64

#endif],

[mips_abi="o64"],

        [AC_MSG_ERROR([unknown MIPS ABI])

[mips_abi="n32"]])])])])

    case "$mips_abi" in

    "o32") GOARCH=mipso32 ;;

    "n32") GOARCH=mipsn32 ;;

    "n64") GOARCH=mipsn64 ;;

    "o64") GOARCH=mipso64 ;;

    esac

    ;;

  rs6000*-*-* | powerpc*-*-*)

    AC_COMPILE_IFELSE([

#ifdef _ARCH_PPC64

#error 64-bit

#endif],

[is_ppc=yes], [is_ppc64=yes])

    if test "$is_ppc" = "yes"; then

      GOARCH=ppc

    else

      GOARCH=ppc64

    fi

    ;;

  sparc*-*-*)

    AC_COMPILE_IFELSE([

#if defined(__sparcv9) || defined(__arch64__)

#error 64-bit

#endif],

[is_sparc=yes], [is_sparc64=yes])

    if test "$is_sparc" = "yes"; then

      GOARCH=sparc

    else

      GOARCH=sparc64

    fi

    ;;

esac

AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)

AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)

AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)

AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)

AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)

AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)

AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)

AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)

AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)

AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)

AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)

AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)

AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)

AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)

AC_SUBST(GOARCH)

dnl Some files are only present when needed for specific architectures.

GO_LIBCALL_OS_FILE=

GO_LIBCALL_OS_ARCH_FILE=

GO_SYSCALL_OS_FILE=

GO_SYSCALL_OS_ARCH_FILE=

if test -f ${srcdir}/go/syscall/libcall_${GOOS}.go; then

  GO_LIBCALL_OS_FILE=go/syscall/libcall_${GOOS}.go

fi

if test -f ${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go; then

  GO_LIBCALL_OS_ARCH_FILE=go/syscall/libcall_${GOOS}_${GOARCH}.go

fi

if test -f ${srcdir}/go/syscall/syscall_${GOOS}.go; then

  GO_SYSCALL_OS_FILE=go/syscall/syscall_${GOOS}.go

fi

if test -f ${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go; then

  GO_SYSCALL_OS_ARCH_FILE=go/syscall/syscall_${GOOS}_${GOARCH}.go

fi

AC_SUBST(GO_LIBCALL_OS_FILE)

AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)

AC_SUBST(GO_SYSCALL_OS_FILE)

AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)

dnl Special flags used to generate sysinfo.go.

OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"

case "$target" in

    mips-sgi-irix6.5*)

        # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct

        # msghdr in .

        OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"

        ;;

    *-*-solaris2.[[89]])

        # Solaris 8/9 need this so struct msghdr gets the msg_control

        # etc. fields in  (_XPG4_2).

        OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__"

        ;;

    *-*-solaris2.1[[01]])

        # Solaris 10+ needs this so struct msghdr gets the msg_control

        # etc. fields in  (_XPG4_2).  _XOPEN_SOURCE=600 as

        # above doesn't work with C99.

        OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"

        ;;

esac

AC_SUBST(OSCFLAGS)

dnl Use -fsplit-stack when compiling C code if available.

AC_CACHE_CHECK([whether -fsplit-stack is supported],

[libgo_cv_c_split_stack_supported],

[CFLAGS_hold=$CFLAGS

CFLAGS="$CFLAGS -fsplit-stack"

AC_COMPILE_IFELSE([[int i;]],

[libgo_cv_c_split_stack_supported=yes],

[libgo_cv_c_split_stack_supported=no])

CFLAGS=$CFLAGS_hold])

if test "$libgo_cv_c_split_stack_supported" = yes; then

  SPLIT_STACK=-fsplit-stack

  AC_DEFINE(USING_SPLIT_STACK, 1,

                [Define if the compiler supports -fsplit-stack])

else

  SPLIT_STACK=

fi

AC_SUBST(SPLIT_STACK)

AM_CONDITIONAL(USING_SPLIT_STACK,

        test "$libgo_cv_c_split_stack_supported" = yes)

dnl Check whether the linker does stack munging when calling from

dnl split-stack into non-split-stack code.  We check this by looking

dnl at the --help output.  FIXME: This is only half right: it's

dnl possible for the linker to support this for some targets but not

dnl others.

AC_CACHE_CHECK([whether linker supports split stack],

[libgo_cv_c_linker_supports_split_stack],

libgo_cv_c_linker_supports_split_stack=no

if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then

  libgo_cv_c_linker_supports_split_stack=yes

fi)

if test "$libgo_cv_c_linker_supports_split_stack" = yes; then

  AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,

            [Define if the linker support split stack adjustments])

fi

dnl Test for the -lm library.

MATH_LIBS=

AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)

AC_SUBST(MATH_LIBS)

dnl Test for -lsocket and -lnsl.  Copied from libjava/configure.ac.

AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,

  [libgo_cv_lib_sockets=

   libgo_check_both=no

   AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)

   if test "$libgo_check_socket" = "yes"; then

     unset ac_cv_func_connect

     AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",

                  libgo_check_both=yes)

   fi

   if test "$libgo_check_both" = "yes"; then

     libgo_old_libs=$LIBS

     LIBS="$LIBS -lsocket -lnsl"

     unset ac_cv_func_accept

     AC_CHECK_FUNC(accept,

                   [libgo_check_nsl=no

                    libgo_cv_lib_sockets="-lsocket -lnsl"])

     unset ac_cv_func_accept

     LIBS=$libgo_old_libs

   fi

   unset ac_cv_func_gethostbyname

   libgo_old_libs="$LIBS"

   AC_CHECK_FUNC(gethostbyname, ,

                 [AC_CHECK_LIB(nsl, main,

                        [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])

   unset ac_cv_func_gethostbyname

   LIBS=$libgo_old_libs

])

NET_LIBS="$libgo_cv_lib_sockets"

AC_SUBST(NET_LIBS)

dnl Test whether the compiler supports the -pthread option.

AC_CACHE_CHECK([whether -pthread is supported],

[libgo_cv_lib_pthread],

[CFLAGS_hold=$CFLAGS

CFLAGS="$CFLAGS -pthread"

AC_COMPILE_IFELSE([[int i;]],

[libgo_cv_lib_pthread=yes],

[libgo_cv_lib_pthread=no])

CFLAGS=$CFLAGS_hold])

PTHREAD_CFLAGS=

if test "$libgo_cv_lib_pthread" = yes; then

  PTHREAD_CFLAGS=-pthread

fi

AC_SUBST(PTHREAD_CFLAGS)

dnl Test for the -lpthread library.

PTHREAD_LIBS=

AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)

AC_SUBST(PTHREAD_LIBS)

dnl Test if -lrt is required for sched_yield.

AC_SEARCH_LIBS([sched_yield], [rt])

AC_C_BIGENDIAN

GCC_CHECK_UNWIND_GETIPINFO

AC_ARG_ENABLE(sjlj-exceptions,

  AC_HELP_STRING([--enable-sjlj-exceptions],

                 [force use of builtin_setjmp for exceptions]),

  [case "$enableval" in

   yes|no|auto) ;;

   *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;

   esac],

  [enable_sjlj_exceptions=auto])

AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],

[libgo_cv_lib_sjlj_exceptions],

[AC_LANG_CONFTEST(

  [AC_LANG_SOURCE([

void bar ();

void clean (int *);

void foo ()

{

  int i __attribute__ ((cleanup (clean)));

  bar();

}

])])

CFLAGS_hold=$CFLAGS

CFLAGS="--save-temps -fexceptions"

libgo_cv_lib_sjlj_exceptions=unknown

AS_IF([ac_fn_c_try_compile],

  [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then

    libgo_cv_lib_sjlj_exceptions=yes

  elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then

    libgo_cv_lib_sjlj_exceptions=no

  fi])

CFLAGS=$CFLAGS_hold

rm -f conftest*

])

if test "$enable_sjlj_exceptions" = "auto"; then

  enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions

fi

case $enable_sjlj_exceptions in

yes)

  AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,

        [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])

  ;;

no)

  ;;

*)

  AC_MSG_ERROR([unable to detect exception model])

  ;;

esac

AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h)

AC_CHECK_HEADERS([linux/filter.h linux/netlink.h linux/rtnetlink.h], [], [],

[#ifdef HAVE_SYS_SOCKET_H

#include 

#endif

])

AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)

AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv)

AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)

AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)

AC_CHECK_FUNCS(epoll_create1 faccessat fallocate fchmodat fchownat futimesat inotify_add_watch inotify_init inotify_rm_watch mkdirat mknodat openat renameat splice tee unlinkat unshare)

AC_TYPE_OFF_T

AC_CHECK_TYPES([loff_t])

CFLAGS_hold="$CFLAGS"

CFLAGS="$CFLAGS $PTHREAD_CFLAGS"

LIBS_hold="$LIBS"

LIBS="$LIBS $PTHREAD_LIBS"

AC_CHECK_FUNCS(sem_timedwait)

CFLAGS="$CFLAGS_hold"

LIBS="$LIBS_hold"

LIBS_hold="$LIBS"

LIBS="$LIBS $MATH_LIBS"

AC_CHECK_FUNCS(matherr)

LIBS="$LIBS_hold"

AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],

[libgo_cv_func___sync_bool_compare_and_swap_4],

[AC_LINK_IFELSE([

typedef unsigned int uint32  __attribute__ ((mode (SI)));

uint32 i;

int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }

],

[libgo_cv_func___sync_bool_compare_and_swap_4=yes],

[libgo_cv_func___sync_bool_compare_and_swap_4=no])])

if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then

  AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,

    [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])

fi

AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],

[libgo_cv_func___sync_bool_compare_and_swap_8],

[AC_LINK_IFELSE([

typedef unsigned int uint64  __attribute__ ((mode (DI)));

uint64 i;

int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }

],

[libgo_cv_func___sync_bool_compare_and_swap_8=yes],

[libgo_cv_func___sync_bool_compare_and_swap_8=no])])

if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then

  AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,

    [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])

fi

AC_CACHE_CHECK([for __sync_fetch_and_add_4],

[libgo_cv_func___sync_fetch_and_add_4],

[AC_LINK_IFELSE([

typedef unsigned int uint32  __attribute__ ((mode (SI)));

uint32 i;

int main() { return __sync_fetch_and_add (&i, 1); }

],

[libgo_cv_func___sync_fetch_and_add_4=yes],

[libgo_cv_func___sync_fetch_and_add_4=no])])

if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then

  AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,

    [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])

fi

AC_CACHE_CHECK([for __sync_add_and_fetch_8],

[libgo_cv_func___sync_add_and_fetch_8],

[AC_LINK_IFELSE([

typedef unsigned int uint64  __attribute__ ((mode (DI)));

uint64 i;

int main() { return __sync_add_and_fetch (&i, 1); }

],

[libgo_cv_func___sync_add_and_fetch_8=yes],

[libgo_cv_func___sync_add_and_fetch_8=no])])

if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then

  AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,

    [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])

fi

dnl For x86 we want to use the -minline-all-stringops option to avoid

dnl forcing a stack split when calling memcpy and friends.

AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],

[libgo_cv_c_stringops],

[CFLAGS_hold=$CFLAGS

CFLAGS="$CFLAGS -minline-all-stringops"

AC_COMPILE_IFELSE([int i;],

[libgo_cv_c_stringops=yes],

[libgo_cv_c_stringops=no])

CFLAGS=$CFLAGS_hold])

STRINGOPS_FLAG=

if test "$libgo_cv_c_stringops" = yes; then

  STRINGOPS_FLAG=-minline-all-stringops

fi

AC_SUBST(STRINGOPS_FLAG)

dnl For x86 we want to compile the math library with -mfancy-math-387

dnl -funsafe-math-optimizations so that we can use the builtin

dnl instructions directly.

AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],

[libgo_cv_c_fancymath],

[CFLAGS_hold=$CFLAGS

CFLAGS="$CFLAGS -mfancy-math-387"

AC_COMPILE_IFELSE([int i;],

[libgo_cv_c_fancymath=yes],

[libgo_cv_c_fancymath=no])

CFLAGS=$CFLAGS_hold])

MATH_FLAG=

if test "$libgo_cv_c_fancymath" = yes; then

  MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"

fi

AC_SUBST(MATH_FLAG)

CFLAGS_hold=$CFLAGS

CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"

AC_CHECK_TYPES([off64_t])

CFLAGS=$CFLAGS_hold

dnl Work out the size of the epoll_events struct on GNU/Linux.

AC_CACHE_CHECK([epoll_event size],

[libgo_cv_c_epoll_event_size],

[AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,

[sizeof (struct epoll_event)],

[#include ],

[libgo_cv_c_epoll_event_size=0])])

SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}

AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)

dnl Work out the offset of the fd field in the epoll_events struct on

dnl GNU/Linux.

AC_CACHE_CHECK([epoll_event data.fd offset],

[libgo_cv_c_epoll_event_fd_offset],

[AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,

[offsetof (struct epoll_event, data.fd)],

[#include 

#include ],

[libgo_cv_c_epoll_event_fd_offset=0])])

STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}

AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)

dnl See if struct exception is defined in .

AC_CHECK_TYPE([struct exception],

[libgo_has_struct_exception=yes],

[libgo_has_struct_exception=no],

[#include ])

if test "$libgo_has_struct_exception" = "yes"; then

  AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,

            [Define to 1 if  defines struct exception])

fi

dnl Check if makecontext expects the uc_stack member of ucontext to point

dnl to the top of the stack.

case "$target" in

  sparc*-*-solaris2.[[89]]*)

    libgo_cv_lib_makecontext_stack_top=yes

    ;;

  *)

    libgo_cv_lib_makecontext_stack_top=no

    ;;

esac

if test "$libgo_cv_lib_makecontext_stack_top" = "yes"; then

  AC_DEFINE(MAKECONTEXT_STACK_TOP, 1,

            [Define if makecontext expects top of stack in uc_stack.])

fi

dnl See whether setcontext changes the value of TLS variables.

AC_CACHE_CHECK([whether setcontext clobbers TLS variables],

[libgo_cv_lib_setcontext_clobbers_tls],

[CFLAGS_hold="$CFLAGS"

CFLAGS="$PTHREAD_CFLAGS"

LIBS_hold="$LIBS"

LIBS="$LIBS $PTHREAD_LIBS"

AC_CHECK_SIZEOF([void *])

AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])

AC_RUN_IFELSE(

  [AC_LANG_SOURCE([

#include 

#include 

#include 

#include 

__thread int tls;

static char stack[[10 * 1024 * 1024]];

static ucontext_t c;

/* Called via makecontext/setcontext.  */

static void

cfn (void)

{

  exit (tls);

}

/* Called via pthread_create.  */

static void *

tfn (void *dummy)

{

  /* The thread should still see this value after calling

     setcontext.  */

  tls = 0;

  setcontext (&c);

  /* The call to setcontext should not return.  */

  abort ();

}

int

main ()

{

  pthread_t tid;

  /* The thread should not see this value.  */

  tls = 1;

  if (getcontext (&c) < 0)

    abort ();

  c.uc_stack.ss_sp = stack;

#ifdef MAKECONTEXT_STACK_TOP

  c.uc_stack.ss_sp += sizeof stack;

#endif

  c.uc_stack.ss_flags = 0;

  c.uc_stack.ss_size = sizeof stack;

  c.uc_link = NULL;

  makecontext (&c, cfn, 0);

  if (pthread_create (&tid, NULL, tfn, NULL) != 0)

    abort ();

  if (pthread_join (tid, NULL) != 0)

    abort ();

  /* The thread should have called exit.  */

  abort ();

}

])],

[libgo_cv_lib_setcontext_clobbers_tls=no],

[libgo_cv_lib_setcontext_clobbers_tls=yes],

[case "$target:$ptr_type_size" in

  i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)

    libgo_cv_lib_setcontext_clobbers_tls=yes ;;

  *)

    libgo_cv_lib_setcontext_clobbers_tls=no ;;

 esac

])

CFLAGS="$CFLAGS_hold"

LIBS="$LIBS_hold"

])

if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then

  AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,

            [Define if setcontext clobbers TLS variables])

fi

AC_CACHE_SAVE

if test ${multilib} = yes; then

  multilib_arg="--enable-multilib"

else

  multilib_arg=

fi

AC_CONFIG_FILES(Makefile testsuite/Makefile)

AC_CONFIG_COMMANDS([default],

[if test -n "$CONFIG_FILES"; then

   # Multilibs need MULTISUBDIR defined correctly in certain makefiles so

   # that multilib installs will end up installed in the correct place.

   # The testsuite needs it for multilib-aware ABI baseline files.

   # To work around this not being passed down from config-ml.in ->

   # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually

   # append it here.  Only modify Makefiles that have just been created.

   #

   # Also, get rid of this simulated-VPATH thing that automake does.

   cat > vpsed << \_EOF

s!`test -f '$<' || echo '$(srcdir)/'`!!

_EOF

   for i in $SUBDIRS; do

    case $CONFIG_FILES in

     *${i}/Makefile*)

       #echo "Adding MULTISUBDIR to $i/Makefile"

       sed -f vpsed $i/Makefile > tmp

       grep '^MULTISUBDIR =' Makefile >> tmp

       mv tmp $i/Makefile

       ;;

    esac

   done

   rm vpsed

 fi

],

[

# Variables needed in config.status (file generation) which aren't already

# passed by autoconf.

SUBDIRS="$SUBDIRS"

])

AC_OUTPUT