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<参考网址2:/rainysun/article/details/60866590>
用命令查找所在位置:
find /usr/include -name "",
结果发现在/usr/include下没有,但在/usr/include/x86_64-linux-gnu/sys下有,用命令把复制到/usr/include下:
sudo cp /usr/include/x86_64-linux-gnu/sys/ /usr/include