# Process this file with autoconf to produce a configure script.
-AC_INIT([userspace-rcu], [0.5.1], [mathieu dot desnoyers at efficios dot com])
+AC_INIT([userspace-rcu], [0.5.4], [mathieu dot desnoyers at efficios dot com])
AC_CONFIG_AUX_DIR([config])
AC_CANONICAL_TARGET
AC_CANONICAL_HOST
AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks
cmpxchg instruction.])
+AH_TEMPLATE([CONFIG_ARM_HAVE_DMB], [Use the dmb instruction is available for use on ARM.])
# Checks for programs.
AC_PROG_CC
sparc64) ARCHTYPE="sparc64" ;;
alpha*) ARCHTYPE="alpha" ;;
ia64) ARCHTYPE="gcc" ;;
- armv7l) ARCHTYPE="armv7l" ;;
+ arm*) ARCHTYPE="arm" ;;
*) ARCHTYPE="unknown";;
esac
+if test "x$ARCHTYPE" = "xarm" ; then
+AC_MSG_CHECKING([checking for dmb instruction])
+AC_TRY_COMPILE(
+[
+],
+[
+asm volatile("dmb":::"memory");
+],
+[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([CONFIG_ARM_HAVE_DMB], [1])
+]
+,
+[
+ AC_MSG_RESULT([no])
+]
+)
+fi
+
UATOMICSRC=urcu/uatomic_arch_$ARCHTYPE.h
ARCHSRC=urcu/arch_$ARCHTYPE.h
if test "x$ARCHTYPE" != xx86 -a "x$ARCHTYPE" != xppc; then