Daniel Jahre:

package/base/binutils/binutils.conf

@@ -22,6 +22,9 @@
 
 pkg_binutils_cross=""
 
+#this fixes a problem with flex
+var_append confopt " " "--disable-werror" 
+
 case "$xpkg" in
 	$pkg-cross-*)
 		pkg_binutils_cross="${xpkg#**-cross-}"