安装MinGW（
https://sourceforge.net/projects/mingw-w64/ ）主要注意PATH
安装gcc g++ gdb，命令行里输入
$ mingw-get install gcc g++ mingw32-make
安装Cmake（ https://cmake.org/download/ ）
CMake配置中，编译器需要选择mingw。如果提示
CMake Error: CMake was unable to find a build program corresponding to balabala
需要安装 mingw32_make.exe
$ mingw-get install mingw32-make