重新安装ubuntu,在编译Qt时报错: /home/Qt5.9.0/Examples/Qt-5.9/widgets/widgets/calculator/button.cpp:51: from …/calculator/button.cpp:51: /home/Qt5.9.0/5.9/gcc_64/include/QtGui/qopengl.h:139: error: GL/gl.h: 没有那个文件或目录 解决方法: sudo aptitude install libgl1-mesa-dev