--- ray/src/common/savestr.c	2017/04/09 21:33:24	2.11
+++ ray/src/common/savestr.c	2023/06/08 17:48:01	2.14
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: savestr.c,v 2.11 2017/04/09 21:33:24 greg Exp $";
+static const char	RCSid[] = "$Id: savestr.c,v 2.14 2023/06/08 17:48:01 greg Exp $";
 #endif
 /*
  *  savestr.c - routines for efficient string storage.
@@ -15,15 +15,13 @@ static const char	RCSid[] = "$Id: savestr.c,v 2.11 201
  *  frees memory associated with the string; it should
  *  never be referenced again.
  *
- *  External symbols declared in standard.h
+ *  External symbols declared in rtio.h
  */
 
 #include "copyright.h"
 
-#include <string.h>
 #include <stdlib.h>
 
-#include "rtmisc.h"
 #include "rterror.h"
 #include "rtio.h"
 
@@ -48,7 +46,7 @@ static S_HEAD  *stab[NHASH];
 
 
 char *
-savestr(char *str)				/* save a string */
+savestr(const char *str)			/* save a string */
 {
 	int  hval;
 	S_HEAD  *sp;
@@ -99,7 +97,7 @@ freestr(char *s)				/* free a string */
 
 
 int
-shash(char *s)
+shash(const char *s)
 {
 	int  h = 0;