问题:编译代码时，提示isnan错误？
将isnan 修改成std::isnan
问题:执行cpp_tests的时候，提示找不到libfmod.so.6？
1) copy
sudo cp <COCOS FOLDER LOCATION>/external/linux-specific/fmod/prebuilt/64-bit/libfmod.so /usr/local/lib/
sudo cp <COCOS FOLDER LOCATION>/external/linux-specific/fmod/prebuilt/64-bit/libfmodL.so /usr/local/lib/
2) create symbolic link in /usr/local/lib/
ln -s libfmod.so libfmod.so.6
3) run ./install-deps-linux again