AC_SUBST(enable_shared)
AC_SUBST(enable_static)
+CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
+AC_SUBST(CC_FOR_BUILD)
+
+AC_PROG_AWK
+
WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
AC_SUBST(WARN_FLAGS)
glibgo_toolexecdir=no
glibgo_toolexeclibdir=no
-glibgo_prefixdir=$prefix
AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
AC_ARG_ENABLE([version-specific-runtime-libs],
# 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
- if test -n "$with_cross_host" &&
- test x"$with_cross_host" != x"no"; then
- glibgo_toolexecdir='${exec_prefix}/${host_alias}'
- glibgo_toolexeclibdir='${toolexecdir}/lib'
- else
- glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
- glibgo_toolexeclibdir='${libdir}'
- fi
- multi_os_directory=`$CC -print-multi-os-directory`
- case $multi_os_directory in
- .) ;; # Avoid trailing /.
- *) glibgo_toolexeclibdir=$glibgo_toolexeclibdir/$multi_os_directory ;;
- esac
+ glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
+ glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
fi
-AC_SUBST(glibgo_prefixdir)
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
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 ;;
- *-*-freebsd*) is_freebsd=yes ;;
- *-*-linux*) is_linux=yes ;;
- *-*-rtems*) is_rtems=yes ;;
+ *-*-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_x86_64=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 ${host} in
+ alpha*-*-*)
+ is_alpha=yes
+ GOARCH=alpha
+ ;;
+ arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
+ is_arm=yes
+ GOARCH=arm
+ ;;
changequote(,)dnl
- i[34567]86-*-*)
+ i[34567]86-*-* | x86_64-*-*)
changequote([,])dnl
- is_386=yes
+ AC_COMPILE_IFELSE([
+#ifdef __x86_64__
+#error 64-bit
+#endif],
+[is_386=yes], [is_x86_64=yes])
+ if test "$is_386" = "yes"; then
+ GOARCH=386
+ else
+ GOARCH=amd64
+ fi
+ ;;
+ m68k*-*-*)
+ is_m68k=yes
+ GOARCH=m68k
;;
- x86_64-*-*)
- if test "$with_multisubdir" = "32"; then
- is_386=yes
+ mips*-*-*)
+ AC_COMPILE_IFELSE([
+#if _MIPS_SIM != _ABIO32
+#error not o32
+#endif],
+[mips_abi="o32"],
+ [AC_COMPILE_IFELSE([
+#if _MIPS_SIM != _ABIN32
+#error not n32
+#endif],
+[mips_abi="n32"],
+ [AC_COMPILE_IFELSE([
+#if _MIPS_SIM != _ABI64
+#error not n64
+#endif],
+[mips_abi="n64"],
+ [AC_COMPILE_IFELSE([
+#if _MIPS_SIM != _ABIO64
+#error not o64
+#endif],
+[mips_abi="o64"],
+ [AC_MSG_ERROR([unknown MIPS ABI])
+[mips_abi="n32"]])])])])
+ case "$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 "$is_ppc" = "yes"; then
+ GOARCH=ppc
else
- is_x86_64=yes
+ GOARCH=ppc64
fi
;;
- arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
- is_arm=yes
+ sparc*-*-*)
+ AC_COMPILE_IFELSE([
+#if defined(__sparcv9) || defined(__arch64__)
+#error 64-bit
+#endif],
+[is_sparc=yes], [is_sparc64=yes])
+ if test "$is_sparc" = "yes"; then
+ GOARCH=sparc
+ else
+ GOARCH=sparc64
+ fi
;;
esac
AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
-AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = 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 <sys/socket.h>.
+ OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
+ ;;
+ *-*-solaris2.[[89]])
+ # Solaris 8/9 need this so struct msghdr gets the msg_control
+ # etc. fields in <sys/socket.h> (_XPG4_2).
+ OSCFLAGS="$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 <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
+ # above doesn't work with C99.
+ OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
+ ;;
+esac
+AC_SUBST(OSCFLAGS)
dnl Use -fsplit-stack when compiling C code if available.
AC_CACHE_CHECK([whether -fsplit-stack is supported],
-[ac_cv_libgo_split_stack_supported],
+[libgo_cv_c_split_stack_supported],
[CFLAGS_hold=$CFLAGS
CFLAGS="$CFLAGS -fsplit-stack"
AC_COMPILE_IFELSE([[int i;]],
-[ac_cv_libgo_split_stack_supported=yes],
-[ac_cv_libgo_split_stack_supported=no])
+[libgo_cv_c_split_stack_supported=yes],
+[libgo_cv_c_split_stack_supported=no])
CFLAGS=$CFLAGS_hold])
-if test "$ac_cv_libgo_split_stack_supported" = yes; then
+if test "$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])
fi
AC_SUBST(SPLIT_STACK)
AM_CONDITIONAL(USING_SPLIT_STACK,
- test "$ac_cv_libgo_split_stack_supported" = yes)
+ test "$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 possible for the linker to support this for some targets but not
dnl others.
AC_CACHE_CHECK([whether linker supports split stack],
-[ac_cv_libgo_linker_supports_split_stack],
-ac_cv_libgo_linker_supports_split_stack=no
+[libgo_cv_c_linker_supports_split_stack],
+libgo_cv_c_linker_supports_split_stack=no
if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
- ac_cv_libgo_linker_supports_split_stack=yes
+ libgo_cv_c_linker_supports_split_stack=yes
fi)
-if test "$ac_cv_libgo_linker_supports_split_stack" = yes; then
+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
+case $ac_cv_c_bigendian in
+ yes) GO_BIGENDIAN=true ;;
+ no) GO_BIGENDIAN=false ;;
+ *) AC_MSG_ERROR([unknown endianness]) ;;
+esac
+AC_SUBST(GO_BIGENDIAN)
GCC_CHECK_UNWIND_GETIPINFO
-AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/user.h sys/utsname.h)
+AC_ARG_ENABLE(sjlj-exceptions,
+ AC_HELP_STRING([--enable-sjlj-exceptions],
+ [force use of builtin_setjmp for exceptions]),
+ [case "$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 $enable_sjlj_exceptions in
+yes)
+ AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
+ [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
+ ;;
+no)
+ ;;
+*)
+ AC_MSG_ERROR([unable to detect exception model])
+ ;;
+esac
+
+AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/reboot.h)
+
+AC_CHECK_HEADERS([linux/filter.h linux/netlink.h linux/rtnetlink.h], [], [],
+[#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+])
+
+AC_CACHE_CHECK([whether <ustat.h> can be used],
+[libgo_cv_c_ustat_h],
+[CFLAGS_hold=$CFLAGS
+CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
+AC_COMPILE_IFELSE(
+[AC_LANG_SOURCE([
+#include <sys/types.h>
+#ifdef HAVE_LINUX_FILTER_H
+#include <linux/filter.h>
+#endif
+#include <ustat.h>
+])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
+CFLAGS=$CFLAGS_hold])
+if test $libgo_cv_c_ustat_h = yes; then
+ AC_DEFINE(HAVE_USTAT_H, 1,
+ [Define to 1 if you have the <ustat.h> header file and it works.])
+fi
+
AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
-AC_CHECK_FUNCS(srandom random strsignal)
+
+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_init1 inotify_rm_watch mkdirat mknodat openat renameat sync_file_range 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],
-[ac_cv_libgo_compiler_supports_inline_all_stringops],
+[libgo_cv_c_stringops],
[CFLAGS_hold=$CFLAGS
CFLAGS="$CFLAGS -minline-all-stringops"
AC_COMPILE_IFELSE([int i;],
-[ac_cv_libgo_compiler_supports_inline_all_stringops=yes],
-[ac_cv_libgo_compiler_supports_inline_all_stringops=no])
+[libgo_cv_c_stringops=yes],
+[libgo_cv_c_stringops=no])
CFLAGS=$CFLAGS_hold])
STRINGOPS_FLAG=
-if test "$ac_cv_libgo_compiler_supports_inline_all_stringops" = yes; then
+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="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
-AC_CHECK_TYPES(off64_t)
+AC_CHECK_TYPES([off64_t])
CFLAGS=$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 <sys/epoll.h>],
+[libgo_cv_c_epoll_event_size=0])])
+SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
+AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
+
+dnl Work out the offset of the fd field in the epoll_events struct on
+dnl GNU/Linux.
+AC_CACHE_CHECK([epoll_event data.fd offset],
+[libgo_cv_c_epoll_event_fd_offset],
+[AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
+[offsetof (struct epoll_event, data.fd)],
+[#include <stddef.h>
+#include <sys/epoll.h>],
+[libgo_cv_c_epoll_event_fd_offset=0])])
+STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
+AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
+
+dnl See if struct exception is defined in <math.h>.
+AC_CHECK_TYPE([struct exception],
+[libgo_has_struct_exception=yes],
+[libgo_has_struct_exception=no],
+[#include <math.h>])
+if test "$libgo_has_struct_exception" = "yes"; then
+ AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
+ [Define to 1 if <math.h> defines struct exception])
+fi
+
+dnl Check if makecontext expects the uc_stack member of ucontext to point
+dnl to the top of the stack.
+case "$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 <pthread.h>
+#include <stdlib.h>
+#include <ucontext.h>
+#include <unistd.h>
+
+__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
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