diff -ruN UnixBench/Makefile b/Makefile
--- a/Makefile	2015-06-04 11:20:18.000000000 -0600
+++ b/Makefile	2015-08-15 01:47:44.310787298 -0600
@@ -196,7 +196,7 @@
 $(PROGDIR)/double: $(SRCDIR)/arith.c
 	$(CC) -o $(PROGDIR)/double ${CFLAGS} ${OPTON} -Ddatum=double $(SRCDIR)/arith.c
 $(PROGDIR)/whetstone-double: $(SRCDIR)/whets.c
-	$(CC) -o $(PROGDIR)/whetstone-double ${CFLAGS} ${OPTON} -DDP -DUNIX -DUNIXBENCH $(SRCDIR)/whets.c -lm
+	$(CC) -o $(PROGDIR)/whetstone-double ${CFLAGS} ${OPTON} -DDP -DGTODay -DUNIXBENCH $(SRCDIR)/whets.c -lm
 $(PROGDIR)/hanoi: $(SRCDIR)/hanoi.c
 	$(CC) -o $(PROGDIR)/hanoi ${CFLAGS} ${OPTON} $(SRCDIR)/hanoi.c