use $(CC) instead of cc

util/ack/Makefile

@@ -66,7 +66,7 @@ dmach.c intable.c: mktables dmach.h
 	mktables $(ACKDIR)
 
 mktables:       mktables.c
-	cc -o mktables mktables.c
+	$(CC) -o mktables mktables.c
 
 pr:
 	@pr Makefile $(HFILES) $(DSRC)

util/ack/pc/Makefile

@@ -6,7 +6,7 @@ PC_PATH=$(EMHOME)/lib/em_pc
 LDFLAGS = -i
 
 em_pc:          em_pc.c $h/local.h $h/em_path.h
-		cc $(LDFLAGS) -o em_pc -O -I$h em_pc.c
+		$(CC) $(LDFLAGS) -o em_pc -O -I$h em_pc.c
 
 cmp:            em_pc
 		cmp em_pc $(PC_PATH)