@ishi Visual Studio is of no interest here as you cannot use it to cross compile to ARM Linux as far as I know. If your app is using OpenCV you will either need to install it on your RPi (including the -dev package) and sync the sysroot, or cross-compile it.

FYI: the issues vanished with the previous version Qt 5.14.2 and the 7.5.0 Linaro toolchain (but not the others!). Suddenly the tests are being run. My cross development toolchain now is up and running, however, I still find it odd that there are no error messages in Qt's build system.

@jsulm http://download.qt.io/official_releases/qt/5.12/5.12.8/single/qt-everywhere-src-5.12.8.tar.xz i downloaded it form here and followed this steps https://www.tal.org/tutorials/building-qt-512-raspberry-pi according to that i can say that 3rd party content also built along with the code

hi wish this help https://forum.qt.io/topic/117637/easy-way-to-cross-compile-qt-for-raspberry-pi

@cosmonaut65 said in EGLFS Full Screen issue on Raspberry Pi 4 Desktop: For the time being, booting into the CLI will have to do I guess is your issue solved then? if so please don't forget to mark your post as such. Thanks.

I managed to solve this issue by following this guide: https://github.com/UvinduW/Cross-Compiling-Qt-for-Raspberry-Pi-4 I think the cross-compiler I downloaded above had issues using my sysroot directory. The instructions linked above use a linaro compiler (albeit an older one) and it compiled Qt 5.15 successfully.