$NetBSD: patch-config_stl__wrappers_ostream,v 1.1 2017/04/27 01:55:57 ryoon Exp $

--- config/stl_wrappers/ostream.orig	2013-05-13 18:22:40.000000000 +0000
+++ config/stl_wrappers/ostream
@@ -0,0 +1,3 @@
+#pragma GCC visibility push(default)
+#include_next <ostream>
+#pragma GCC visibility pop