- 
    Bug 
- 
    Resolution: Done
- 
    P3: Somewhat important 
- 
    5.9
- 
    None
./configure --help | grep -i xlib -xcb-xlib............. Enable Xcb-Xlib support [auto]
src/platformsupport/eglconvenience/eglconvenience.pro:qtConfig(xlib) {
src/platformsupport/platformsupport.pro:qtConfig(xlib):qtConfig(opengl):!qtConfig(opengles2): \
src/plugins/platforms/offscreen/offscreen.pro:qtConfig(xlib):qtConfig(opengl):!qtConfig(opengles2) {
With the current configuration options we can disable xlib in XCB plugin with "no-xcb-xlib", but we can't disable Xlib feature by itself.