$NetBSD: patch-ab,v 1.2 2015/04/11 16:16:54 schwarz Exp $

--- port.h.orig	2014-08-02 20:04:01.000000000 +0200
+++ port.h	2015-04-11 17:53:12.000000000 +0200
@@ -1,6 +1,6 @@
 /* port.h - portability defines */
 
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__DragonFly__)
 # define OS_FreeBSD
 # define ARCH "FreeBSD"
 #elif defined(__OpenBSD__)
@@ -40,7 +40,7 @@
 # define HAVE_SRANDOMDEV
 # ifdef SO_ACCEPTFILTER
 #  define HAVE_ACCEPT_FILTERS
-#  if ( __FreeBSD_version >= 411000 )
+#  if ( defined(__FreeBSD_version) && __FreeBSD_version >= 411000 )
 #   define ACCEPT_FILTER_NAME "httpready"
 #  else
 #   define ACCEPT_FILTER_NAME "dataready"