--- sawfish-1.8.1-r1.ebuild	2011-09-01 14:25:11.000000000 +0200
+++ sawfish-1.8.1-r2.ebuild	2011-09-02 00:12:51.000000000 +0200
@@ -3,6 +3,7 @@
 # $Header: /var/cvsroot/gentoo-x86/x11-wm/sawfish/sawfish-1.8.1.ebuild,v
 
 EAPI="2"
+inherit flag-o-matic
 
 WANT_AUTOMAKE="latest"
 WANT_AUTOCONF="latest"
@@ -82,6 +83,7 @@
 		set -- "$@" --without-pango
 	fi
 
+	filter-flags -O?
 	econf "$@" || die "configure failed"
 	emake || die "make failed"