missing makefile??

lab2/Makefile

@@ -0,0 +1,14 @@
+OUT_DIR := build
+OUT_BIN := $(OUT_DIR)/qsort
+
+$(OUT_BIN): qsort.c
+	mkdir -p $(OUT_DIR)
+	gcc -pthread qsort.c -o $(OUT_BIN)
+
+.PHONY: run
+run: $(OUT_BIN)
+	./$(OUT_BIN)
+
+.PHONY: clean
+clean:
+	rm -rf $(OUT_DIR)