$NetBSD: patch-af,v 1.5 2006/08/22 20:17:23 joerg Exp $

--- mzscheme/sconfig.h.orig	2004-12-19 08:38:26.000000000 +0000
+++ mzscheme/sconfig.h
@@ -288,6 +288,37 @@
 
 #endif
 
+  /************** x86/DragonFly with gcc ****************/
+
+# if defined(__DragonFly__) && defined(i386)
+
+# define SCHEME_PLATFORM_LIBRARY_SUBPATH "dragonfly"
+
+# include "uconfig.h"
+# undef HAS_STANDARD_IOB
+
+# define HAS_BSD_IOB
+
+# define STACK_GROWS_DOWN
+
+# define USE_UNDERSCORE_SETJMP
+
+# define USE_IEEE_FP_PREDS
+# define FREEBSD_CONTROL_387
+# define POW_HANDLES_INF_CORRECTLY
+
+# define USE_DYNAMIC_FDSET_SIZE
+
+# define SIGSET_IS_SIGNAL
+
+# define USE_TM_GMTOFF_FIELD
+
+# define REGISTER_POOR_MACHINE
+
+# define FLAGS_ALREADY_SET
+
+#endif
+
   /************** x86/FreeBSD with gcc ****************/
 
 # if defined(__FreeBSD__) && defined(i386)