what is wrong here

Makefile

@@ -1,7 +1,12 @@
+CC=clang
+CARGS=-Wall -Werror -O3
+OBJ=vcd
+SRC=vcd.c
+
 all: comp
 comp:
-	gcc -Wall -Werror -o vcd vcd.c
+	$(CC) $(CARGS) -o $(OBJ) $(SRC)
 clean:
 	rm -rf ./vcd
 install:
-	cp ./vcd /usr/bin/vcd
+	cp ./$(OBJ) /usr/bin/$(OBJ)