--- configure.orig	Thu Sep 22 22:12:58 2016
+++ configure	Thu Sep 22 22:13:27 2016
@@ -2604,7 +2604,7 @@ fi
 
 if test "x$enable_maintainermode" = "xno"; then
 if test "x$enable_release" = "xyes"; then
-    FLAGS_ALL="-O3 -fomit-frame-pointer -Wall -fsigned-char"
+    FLAGS_ALL="${CFLAGS}"
 else
     FLAGS_ALL="-ggdb -g3 -O0 -Wall -fsigned-char"
 fi