diff -r b9cc58992572 -r c4bcba8023a9 configure.ac
--- a/configure.ac	Wed Aug 20 18:56:17 2014 +0100
+++ b/configure.ac	Sat Aug 23 16:28:31 2014 +0100
@@ -118,7 +118,7 @@
   changequote(,)dnl
   case " $CFLAGS " in
   *[\ \	]-Wall[\ \	]*) ;;
-  *) CFLAGS="$CFLAGS -Wall" ;;
+  *) CFLAGS="$CFLAGS -Wall -Wno-parentheses" ;;
   esac
 
   case " $CFLAGS " in