Makefile学习

#作者：    qiang
#日期：    2010.9.2
#作用：    测试Makefile自动化变量
#结论：   
#    $<:第一个依赖文件
#    $@:目标文件
#    $^:所有的依赖文件

all:
    @echo you have typed command "make all"
clean:
    @echo you have typed command "make clean"
install:
    @echo you have typed command "make $@"
qiang: all clean install
    @echo you have typed command "make $@"

#作用：    测试Makefile运行顺序
#结果:
    #qiang@LinuxSir:~$ make test0
    #you have typed command make test3!
    #you have typed command make test2!
    #you have typed command make test1!
    #you have typed command make test0!
#结论：
#    Makefile如果有依赖，先执行生成依赖，然后再去执行下面的command

test0:test1
    @echo you have typed command "make test0!"

test1:test2
    @echo you have typed command "make test1!"

test2:test3
    @echo you have typed command "make test2!"

test3:
    @echo you have typed command "make test3!"

#作用：测试include
#结果：
    #qiang@LinuxSir:~/test$ make qiang
    #qiang,AMBA is stand for ambarella!
#结论：include在Makefile前后都可以

include commen.mk

qiang:
    @echo "qiang,AMBA is stand for $(AMBA)!"

#include内容