下载 qt-everywhere-opensource-src-5.15.11.tar.xz：点击跳转

1、配置
mkdir qt-5.15-build
cd qt-5.15-build
./../qt-everywhere-src-5.15.11/configure -prefix /opt/qt5.15 -shared -sql-sqlite -xcb -xcb-xlib -bundled-xcb-xinput -qt-zlib -qt-libpng -qt-libjpeg -no-fontconfig -iconv \-nomake tests -nomake examples -skip qt3d   -nomake tools2、编译
make 
sudo make install3、配置环境变量
vi ~/.profile 
在最后面输入：
export QTDIR=/opt/qt5.15
export PATH=$QTDIR/bin:$PATH
export MANPATH=$QTDIR/man:$MANPATH
export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH问题：
ERROR: Feature 'xcb' was enabled, but the pre-condition 'features.thread && libs.xcb && tests.xcb_syslibs && features.xkbcommon-x11' failed.
解决：
sudo apt-get install libxkbcommon* libxcb* libthread*在执行configure之前，记得先删除config.cache 缓存文件