X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=configure.ac;h=187cf43696a609701edcaef65931998e348df6a5;hp=ba0f466e4c3e3b5a04d13f3b7359051647df5664;hb=6cf6f5f823c1bb7c13077130962555a58bcc79ce;hpb=8f6be0e372674fe673cef80ebea95c5c3081c496

diff --git a/configure.ac b/configure.ac
index ba0f466..187cf43 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 
-AC_INIT([userspace-rcu], [0.4.5], [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
@@ -20,6 +20,7 @@ AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory f
 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
@@ -52,10 +53,29 @@ case $host_cpu in
 	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