不用clang，更换g++支持c++17特性通过编译
https://stackoverflow.com/questions/17275348/how-to-specify-new-gcc-path-for-cmake
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GAMES: Graphics And Mixed Environment Symposium
不用clang，更换g++支持c++17特性通过编译
https://stackoverflow.com/questions/17275348/how-to-specify-new-gcc-path-for-cmake
