--- ray/src/hd/rhdriver.h	2003/06/20 00:25:49	3.22
+++ ray/src/hd/rhdriver.h	2003/07/14 22:24:00	3.23
@@ -1,10 +1,16 @@
-/* RCSid: $Id: rhdriver.h,v 3.22 2003/06/20 00:25:49 greg Exp $ */
+/* RCSid: $Id: rhdriver.h,v 3.23 2003/07/14 22:24:00 schorsch Exp $ */
 /*
  * Header file for holodeck device driver routines.
  */
+#ifndef _RAD_RHDRIVER_H_
+#define _RAD_RHDRIVER_H_
 
 #include "view.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern struct driver {
 	char	*name;		/* holodeck name or title */
 	VIEW	v;		/* base view parameters */
@@ -163,3 +169,10 @@ Set odev.v.type=0 and odev.hres=odev.vres=0 when done.
 extern VIEW	*dev_auxview();
 
 extern int16	*beam_view();
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_RHDRIVER_H_ */
+