first commit

Linux读取或修改系统时间/Makefile

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+SRC := #
+SRC += main.c
+
+#OBJ := $(subst .c,.o,$(SRC))
+OBJ = $(SRC:%.c=%.o)
+
+CC = gcc
+FLAG = -Wall
+OPTION = -lpthread -ldl 
+EXEC_NAME = demo
+EXEC_PATH = .
+
+.PHONY:clean demo
+
+demo:$(OBJ)
+	@echo make ...
+	$(CC) $^ -o $(EXEC_PATH)/$(EXEC_NAME) $(FLAG) $(OPTION)
+	@echo make over
+	@echo Execute target is $(EXEC_PATH)/$(EXEC_NAME)
+$(OBJ):%.o:%.c
+	$(CC) -c -o $@ $< $(FLAG)
+clean:
+	@echo clean ...
+	rm $(EXEC_PATH)/$(EXEC_NAME) *.o -rf
+	@echo clean over