Update makefile

Author: oleggromov

Makefile

@@ -1,16 +1,19 @@
-CFLAGS=-Wall -Wextra -pedantic -std=c99 -g
+CC=clang
+CFLAGS=-pedantic -Wall -Wextra -std=c99 -g
+# Why murmur3_32.o is not in OBJS?
+OBJS=json.o hashmap.o dynarray.o tokenize.o parse.o util.o murmur3_32.o
 
-json: json.c dynarray.o hashmap.o tokenize.o parse.o util.o murmur3_32.o
-	$(CC) $(CFLAGS) -o $@.out $^
+json: $(OBJS)
+	$(CC) $(CFLAGS) $(OBJS) -o json.out
 
-hashmap: hashmap.c murmur3_32.o
+dynarray_test: dynarray_test.c dynarray.o util.o
 	$(CC) $(CFLAGS) -o $@.out $^
 
-dynarray_test: dynarray_test.c dynarray.o util.o
+hashmap_test: hashmap_test.c hashmap.o murmur3_32.o util.o
 	$(CC) $(CFLAGS) -o $@.out $^
 
 %.o: %.c
-	$(CC) $(CFLAGS) -c $^ -o $@
+	$(CC) $(CFLAGS) -c $< -o $@
 
 clean:
-	rm -f json *.o
+	rm -rf *.out *.o *.dSYM