（Linux）Makefile 文件的编写

例子

#交叉编译工具链绝对路径,去掉首个 / 为相对路径
CC = /root/OpenWrt-Toolchain-ramips-for-mipsel_24kec+dsp-gcc-4.8-linaro_uClibc-0.9.33.2/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mipsel-openwrt-linux-gcc

#编译目标文件
APP = myLn

#主函数入口文件
SOURCES = myLn.c

#头文件相对路径  
DEPENDS = 	Components/one.h \
			Components/two.h \
			Components/aes.h \
			Components/gps.h \
			Components/tcp.h \
			Components/data_process.h \
			Components/i2c_bmx055.h
#头文件目标文件相对路径
OBJS = 	Components/one.o \
		Components/two.o \
		Components/aes.o \
		Components/gps.o \
		Components/tcp.o \
		Components/data_process.o\
		Components/i2c_bmx055.o
#-I 后加相对头文件路径
INCLUDES = -IComponents

#动态链接库
LIBS	  = -lm -lpthread -ldl
CFLAGS = -std=c99

#[可执行文件]包括 :[头文件] [头文件编译目标] [主函数文件]
$(APP) :  $(DEPENDS) $(OBJS) $(SOURCES)

#用[GCC工具链] 把[主函数文件]编译成[可执行文件APP]，同时应用[CFLAGS][CFLAGS][LIBS][INCLUDES][INCLUDES][OBJS]
$(CC) $(SOURCES) -o $(APP) $(CFLAGS) $(LIBS) $(INCLUDES) $(OBJS) 

PHONY: all clean
all: $(APP)

clean:
	rm -rf $(APP)
	rm -rf *.o Components/*.o