@Zwenig die einfachste Methode ist der package manager. den findest du eigentlich vorinstalliert in der Menüleiste, einfach nach Creator oder QtCreator suchen und installieren. darüber bekommst du auch eine version von Qt (Bibliothek), sollte neuer als 5.11 sein, also sollte dein Programm damit auch kompilieren

@kingfranz said in cross compiling for ubuntu 21.10 on raspberry pi 4: /usr/lib, /usr/include and /opt Yes, you do not have to copy whole root file system. "I haven't found any info of what is needed" - what is needed heavilly depends on what parts of Qt you want to build. What you can do is: run configure with your current sysroot, see which tests fail and for those you need check why they fail (check configure.log file) and install missing dev packages.

The second choice, same folder structure.

On the Raspberry Pi, in the terminal before running my application, I had to run export QML2_IMPORT_PATH=/usr/local/qt5.15/qml and that fixed it. I put that line in my ~/.profile and it seems to have fixed it permanently. I no longer have to run the export command manually.

Hi, A QMediaRecorder to the mix.

@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.

Hi author here, Now there's a dedicated guide available to follow for cross-compiling latest QT for any Raspberry Pi Model or Version with mentioned GCC toolchains: https://github.com/abhiTronix/raspberry-pi-cross-compilers/blob/master/QT_build_instructions.md