Cross compiled Qt 5.15.2 for Raspberry Pi 4, warnings about XCB and cursor on screen

rokk

Hi,
I cross-compiled Qt 5.15.2 following this guide https://github.com/UvinduW/Cross-Compiling-Qt-for-Raspberry-Pi-4 and everything seems to work. Then I cross-compiled my application (it's a c++ application with no GUI, it just open a window using OpenCV). My application works but shows this errors (warnings?) on startup:

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in ""

Why does it look for xcb ? libqxcb.so does not even exist, since EGLFS is used..

Failed to move cursor on screen HDMI1: -13
Could not set cursor on screen HDMI1: -13

What does it mean ?

Can I safely ignore this warnings ?
Thanks

sierdzio

Try running the app with -platform eglfs to force it to use EGLFS.

SGaist

Hi,

Depending on your version of OpenCV, it might use Qt as backend for its highgui module.