+else
+ # so we can report below
+ enable_dhcpv4o6="no"
+fi
+
+# Relay port (draft-ietf-dhc-relay-port-10.txt) optional compile-time feature.
+AC_ARG_ENABLE(relay-port,
+ AS_HELP_STRING([--enable-relay-port],[enable support for relay port (default is no)]))
+# Relay port is off by default (for now)
+if test "$enable_relay_port" = "yes"; then
+ AC_DEFINE([RELAY_PORT], [1],
+ [Define to 1 to include relay port support.])
+else
+ # so we can report below
+ enable_relay_port="no"