--- Net2/sys/gprof.h	2018/04/24 18:03:57	1.1
+++ Net2/sys/gprof.h	2018/04/24 18:16:01	1.1.1.2
@@ -30,9 +30,13 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)gprof.h	7.2 (Berkeley) 2/15/91
+ *	from: @(#)gprof.h	7.2 (Berkeley) 2/15/91
+ *	gprof.h,v 1.3 1993/05/20 16:22:20 cgd Exp
  */
 
+#ifndef _SYS_GPROF_H_
+#define _SYS_GPROF_H_
+
 struct phdr {
     char	*lpc;
     char	*hpc;
@@ -112,3 +116,5 @@ struct rawarc {
      */
 #define ROUNDDOWN(x,y)	(((x)/(y))*(y))
 #define ROUNDUP(x,y)	((((x)+(y)-1)/(y))*(y))
+
+#endif /* !_SYS_GPROF_H_ */