$NetBSD: patch-ab,v 1.8 2009/11/07 18:43:37 hasso Exp $

--- libdvdread4/bswap.h.orig
+++ libdvdread4/bswap.h
@@ -61,7 +61,7 @@
 #define B2N_32(x) x = swap32(x)
 #define B2N_64(x) x = swap64(x)
 
-#elif defined(__FreeBSD__) && __FreeBSD_version >= 470000
+#elif (defined(__FreeBSD__) && __FreeBSD_version >= 470000) || defined(__DragonFly__)
 #include <sys/endian.h>
 #define B2N_16(x) x = be16toh(x)
 #define B2N_32(x) x = be32toh(x)
