--- /dev/null
+--- a/configure
++++ b/configure
+@@ -1083,7 +1083,7 @@ fi
+
+
+ if test "x$ac_cv_prog_gcc" = xyes ; then
+- CFLAGS="-O2"
++ CFLAGS="-O2 ${CFLAGS}"
+ case "$host_os" in
+ IRIX*)
+ CFLAGS="-mabi=n32 -fno-builtins ${CFLAGS}"
+@@ -1097,7 +1097,7 @@ else
+ LDFLAGS="-n32 -L/usr/lib32 -L/usr/freeware/lib32 ${LDFLAGS}"
+ ;;
+ OSF*)
+- CFLAGS="-O -assume noaligned_objects"
++ CFLAGS="-O -assume noaligned_objects ${CFLAGS}"
+ ;;
+ esac
+ fi