--- openmpi-1.5/opal/config/opal_config_asm.m4.jj	2010-09-28 23:33:51.000000000 +0200
+++ openmpi-1.5/opal/config/opal_config_asm.m4	2011-02-23 01:39:21.191433509 +0100
@@ -885,7 +885,7 @@ AC_DEFUN([OMPI_CONFIG_ASM],[
                 ompi_cv_asm_arch="AMD64"
             fi
             OPAL_ASM_SUPPORT_64BIT=1
-            OMPI_GCC_INLINE_ASSIGN='"xaddl %1,%0" : "=m"(ret), "+r"(negone)'
+            OMPI_GCC_INLINE_ASSIGN='"xaddl %1,%0" : "=m"(ret), "+r"(negone) : "m"(ret)'
             ;;
 
         ia64-*)