From a quick search PetaLinux is yocto based so you need to follow that path to setup your system.
Xilinx provides https://github.com/Xilinx/meta-qt6 and you need to remove the meta-qt5 layer from your installation before you can use it.

Search for petalinux Qt and you should get some more information about how to do that stuff.

Do you really have to build Qt by yourself?

I don't understand what you mean by that.

I have two options.

• Cross-compile and provide the compiled output
• Compile it internally

What do you mean? And also, how can I run it without compiling it?

@jsulm said in How could I build Qt 6.11 on Petalinux:

https://doc.qt.io/qt-6.11/linux-building.html

I know how can I build normal ubuntu, but I do not know petalinux etc.

I will try compile in arm device and move to file other device