--- ray/src/rt/persist.c	1993/01/21 17:01:24	2.3
+++ ray/src/rt/persist.c	1993/01/29 12:02:29	2.6
@@ -9,6 +9,9 @@ static char SCCSid[] = "$SunId$ LBL";
  */
 
 #include "standard.h"
+
+#ifdef F_SETLKW
+
 #include "paths.h"
 #include <signal.h>
 #include <sys/types.h>
@@ -96,7 +99,6 @@ pfhold()		/* holding pattern for idle rendering proces
 	register int	n;
 				/* close input and output descriptors */
 	close(fileno(stdin));
-	fflush(stdout);
 	close(fileno(stdout));
 				/* create named pipes for input and output */
 	if (mknod(mktemp(strcpy(inpname,TEMPLATE)), S_IFIFO|0600) < 0)
@@ -126,7 +128,6 @@ pfhold()		/* holding pattern for idle rendering proces
 	inpname[0] = '\0';
 	unlink(outpname);
 	outpname[0] = '\0';
-	clean_slate();		/* reset time and ray counters */
 	return;
 createrr:
 	error(SYSTEM, "cannot create named pipes in pfhold");
@@ -195,3 +196,5 @@ io_process()		/* just act as conduits to and from actu
 formerr:
 	error(USER, "format error in persist file");
 }
+
+#endif