--- ray/src/common/color.c	1992/06/29 22:40:28	2.3
+++ ray/src/common/color.c	1992/10/02 15:59:58	2.4
@@ -17,7 +17,11 @@ static char SCCSid[] = "$SunId$ LBL";
 #define  MINELEN	8	/* minimum scanline length for encoding */
 #define  MINRUN		4	/* minimum run length */
 
+#ifndef frexp
+extern double  frexp();
+#endif
 
+
 char *
 tempbuffer(len)			/* get a temporary buffer */
 unsigned  len;
@@ -225,7 +229,6 @@ setcolr(clr, r, g, b)		/* assign a short color value *
 register COLR  clr;
 double  r, g, b;
 {
-	double  frexp();
 	double  d;
 	int  e;