跨平台的安装（编译）工具，可以用简单的语句来描述所有平台的安装(编译过程)。他能够输出各种各样的makefile或者project文件，能测试编译器所支持的C++特性(A cross platform installation (compilation) tool that can be used to describe the installation of all platforms (compilation) with simple statements. He can output all sorts of makefile or project files that can test the C++ features that the compiler supports)