[SOLVED] How should I package my Qt/QML application for Ubuntu with a newer Qt?

How should I package my Qt/QML application for Ubuntu with a newer Qt?

I want to target Ubuntu 24.04, but with these requirements:

Qt 6.5.3+ (Ubuntu 24.04 sadly has only 6.4 in the repositories)
My application depends on librtmidi

This script worked pretty well, but it won't naturally bundle any other libs than Qt libs + QML runtime and won't package anything further:

https://doc.qt.io/qt-6/qt-generate-deploy-qml-app-script.html

I also couldn't figure out how to make that script work with CPack that I have used to create a Deb.

I tried to build an AppImage, but it failed because I should have used some ancient LTS as the build platform.

So...would Snap be the only realistic option to make this work?

I would prefer Deb, but I don't know how I could make it install the whole Qt runtime somewhere so that it works. Maybe with a custom build script instead of CPack ?

Solution

Actually I was able to make CPack work with https://doc.qt.io/qt-6/qt-generate-deploy-qml-app-script.html by adding set(CPACK_PACKAGING_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}") and then setting CMAKE_INSTALL_PREFIX to /opt/myApplication (for example).