--- rsync-2.6.6/configure	Thu Jul 28 13:31:05 2005
+++ ../rsync-2.6.6/configure	Mon Feb 13 16:36:11 2006
@@ -4669,6 +4669,12 @@
 /* confdefs.h.  */
 _ACEOF
 cat confdefs.h >>conftest.$ac_ext
+case "$ac_header" in
+  sys/mode.h)
+	case "$host_os" in
+		irix*)	echo "#define _KMEMUSER 1" >> conftest.$ac_ext ;;
+	esac ;;
+esac
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 $ac_includes_default