QT5.12 环境变量配置

```bash
export  QTDIR=/usr/local/Qt_5.12.5

export QT_ROOT=$QTDIR
export PATH=$QTDIR/bin:$PATH
export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATH
export QT_QPA_PLATFORM_PLUGIN_PATH=$QT_ROOT/plugins
export QT_QPA_PLATFORM=eglfs
export QT_QPA_EGLFS_INTEGRATION=eglfs_mali
export QT_QPA_FONTDIR=$QT_ROOT/fonts
export QTWEBENGINE_DISABLE_SANDBOX=1
export PATH=$PATH:/usr/local/Qt_5.12.5/libexec/

export QT_QPA_GENERIC_PLUGINS=tslib
export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=$DEVICE_TS
export QT_QPA_EGLFS_DISABLE_INPUT=1
```

运行测试：
/usr/local/Qt_5.12.5/examples/webenginewidgets/simplebrowser/simplebrowser   https://www.17sucai.com/pins/demo-show?id=35297