--- ray/src/hd/rholo.h	2003/06/20 00:25:49	3.22
+++ ray/src/hd/rholo.h	2003/07/14 22:24:00	3.23
@@ -1,11 +1,17 @@
-/* RCSid: $Id: rholo.h,v 3.22 2003/06/20 00:25:49 greg Exp $ */
+/* RCSid: $Id: rholo.h,v 3.23 2003/07/14 22:24:00 schorsch Exp $ */
 /*
  * Header file for rholo program
  */
+#ifndef _RAD_RHOLO_H_
+#define _RAD_RHOLO_H_
 
 #include "holo.h"
 #include "vars.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifndef RPACKSIZ
 #define RPACKSIZ	21		/* good packet size */
 #endif
@@ -114,3 +120,10 @@ extern char	*rtargv[];
 extern PACKET	*do_packets(), *get_packets(), *flush_queue();
 
 extern int16	*viewbeams();
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_RHOLO_H_ */
+