$NetBSD: patch-ae,v 1.2 2010/03/03 03:40:00 dmcmahill Exp $

--- utils/magic.h.orig	2006-10-04 17:30:19.000000000 +0000
+++ utils/magic.h
@@ -280,7 +280,7 @@ extern char AbortMessage[];
 #ifdef CYGWIN
 #include <errno.h>
 #define sys_errlist _sys_errlist
-#elif !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(macosx)
+#elif !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__DragonFly__) && !defined(macosx)
 extern int errno;
 /* extern char *sys_errlist[]; */
 #elif defined(macosx)