$NetBSD: patch-ah,v 1.2 2015/12/29 23:34:55 dholland Exp $

Dragonfly support.

--- ioext.c.orig	2006-02-19 17:41:00.000000000 +0000
+++ ioext.c
@@ -70,6 +70,9 @@ SCM	stat2scm P((struct stat *stat_temp))
 #ifdef __FreeBSD__
 # include <unistd.h>
 #endif
+#ifdef __DragonFly__
+# include <unistd.h>
+#endif
 #ifdef __NetBSD__
 # include <unistd.h>
 #endif