$NetBSD$

--- elab_net.cc.orig	2010-09-27 17:42:32.000000000 +0000
+++ elab_net.cc
@@ -26,6 +26,7 @@
 
 # include  <cstdlib>
 # include  <cstring>
+# include  <memory>
 # include  <iostream>
 # include  "ivl_assert.h"
 
