1 files changed, 6 insertions, 4 deletions
diff --git a/Makefile b/Makefile
index 218bcd9..36baa79 100644
--- a/Makefile
+++ b/Makefile
@@ -2,15 +2,17 @@
 
 CFLAGS=-g
 OBJS=y.tab.o lex.yy.o num.o ops.o set.o var.o rel.o expr.o
+YFLAGS=-d
+LIBS=-ly -ll -lm
 
 bc: $(OBJS)
-	$(CC) $(CFLAGS) $(OBJS) -o $@ -ly -ll -lm
+	$(CC) $(CFLAGS) $(OBJS) -o $@ $(LIBS)
 
 lex.yy.c: bc.l y.tab.h
-	$(LEX) bc.l
+	$(LEX) $(LFLAGS) bc.l
 
 y.tab.c y.tab.h: bc.y
-	$(YACC) -d bc.y
+	$(YACC) $(YFLAGS) bc.y
 
 clean:
-	rm -rf bc *.o y.tab.c y.tab.h lex.yy.c
+	rm -rf bc *.o y.* lex.yy.c