通用Makefile，编译生成

新建一个Makefile文件，把下面内容拷过去，项目里直接用make命令就okay

make
make clean

CC = g++
CFLAGS = -pthread
TARGET = TEST
DIRS = .
FILES = $(foreach dir, $(DIRS), $(wildcard $(dir)/*.cpp))
OBJS = $(patsubst %.cpp, %.o, $(FILES))
TARGETNAME := TEST

$(TARGET):$(OBJS)
	$(CC) -o $(TARGET) $(OBJS) $(CFLAGS)
$(OBJS):%o:%cpp
	$(CC) -c $< -o $@ $(CFLAGS)

clean:
	-$(RM) $(TARGET) $(OBJS)