一、安装qt5.9.2

1.安装依赖

yum groupinstall "C Development Tools and Libraries"
yum install libgl libgl-devel
yum install mesa-libGL-devel mesa-libGLU-devel freeglut-devel
yum install libxcb libxcb-devel libXrender libXrender-devel xcb-util-wm xcb-util-wm-devel xcb-util xcb-util-devel xcb-util-image xcb-util-image-devel xcb-util-keysyms xcb-util-keysyms-devel

2.下载Linux 安装包

下载地址

开发者版  http://download.qt.io/development_releases/qt/
发布版  http://download.qt.io/archive/qt/

wget http://download.qt.io/archive/qt/5.9/5.9.2/qt-opensource-linux-x64-5.9.2.run
chmod +x qt-opensource-linux-x64-5.9.2.run
./qt-opensource-linux-x64-5.9.2.run

3.在/etc/ld.so.conf.d下面新建 qt5.9.2-x86_64.conf，写入以下内容

/opt/Qt5.9.2/5.9.2/gcc_64/lib

/opt/Qt5.9.2/Tools/QtCreator/lib

使用ldconfig刷新动态库缓存。

4.vim ~/.bash_profile

export PATH=/opt/Qt5.9.2/gcc_64/bin/:/opt/Qt5.9.2/Tools/QtCreator/bin:$PATH:$HOME/bin

source ~/.bash_profile刷新环境变量

5.输入qtcreator进行验证是否安装成功

参考链接：https://www.cnblogs.com/lsgxeva/p/7688884.html

二、安装labelImg

链接：https://www.cnblogs.com/jack123/p/12985755.html

然后发现一个问题：plugin "xcb" in "" even though it was found.

输入命令：

export QT_DEBUG_PLUGINS=1

python3 labelImg.py

查看发现是这一行有错： lableimg libxcb-render-util.so.0 => not found

折腾一番后发现是PyQt5的版本高了，安装的是5.15点几，重装一个

yum install PyQt5==5.12.3

python3 labelImg.py

ok了。