diff -r 6219326604a3 switch/switch.c
--- a/switch/switch.c	Wed Apr 06 14:56:45 2011 -0400
+++ b/switch/switch.c	Mon Jun 18 21:59:53 2012 -0700
@@ -79,6 +79,9 @@
 
 static void add_ports(struct datapath *dp, char *port_list);
 
+#ifdef NS3
+/* main function disabled for ns-3 build */
+#else
 int
 main(int argc, char *argv[])
 {
@@ -136,6 +139,7 @@
 
     return 0;
 }
+#endif
 
 static void
 add_ports(struct datapath *dp, char *port_list)
diff -r 6219326604a3 wscript
--- a/wscript	Wed Apr 06 14:56:45 2011 -0400
+++ b/wscript	Mon Jun 18 21:59:53 2012 -0700
@@ -49,6 +49,7 @@
 	'/usr/include/libxml2',
     ]
     of.env.append_value('CCFLAGS', '-fPIC')
+    of.env.append_value('CCFLAGS', '-DNS3')
     of.target = 'openflow'
 
     # finally, let's install all this crap