以前在Linux下看过一些auto make 工具生成的Makefile，感觉生成的Makefile有一个原则，就是死命让人看不懂，显得很高深莫测，我不甘心，一些网友又给我推荐cmake，搜索一下果然是吹的神乎其技，并且说大型工程，自己手工写Makefile的人就是SB。于是我就整起来，开始在windows下整，遇到一些问题始终很奇怪，解决不了，于是还是在ubuntu下来搞吧。
sudo apt-get install cmake 安装即可
于是随便整一个只有main 函数的一个c文件，修改 CMakeLists.txt进行编译，提示No CMAKE_CXX_COMPILER could be found
通过：
sudo apt-get update
sudo apt-get install -y build-essential
解决了，cmake 后生成了Makefile ，执行make 也能生成可执行文件，不过打开Makefile一看，我的神啊，就一个main 函数，居然生成这么多。。。。。。
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help:
@echo "The following are some of the valid targets for this Makefile:"
@echo "... all (the default if no target is provided)"
@echo "... clean"
@echo "... depend"
@echo "... rebuild_cache"
@echo "... edit_cache"
@echo "... cmake_test"
@echo "... align.o"
@echo "... align.i"
@echo "... align.s"
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过于复杂，要知道Linux 这么大的代码，也是没这么晦涩的，也不智能，不能用，放弃！看来还是自己老老实实写Makefile改善，写好框架就简单了。
