Tux Machines

Building Plasma against Qt6

Posted by Roy Schestowitz on Mar 27, 2023

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As you probably have heard by now the lastest development versions of Plasma and KDE Frameworks require Qt6. This transition has been in the works for a few years by now, but it was only somewhat recently that we took the plunge and started relying on Qt6 exclusively for Plasma. Plasma 5.27 is the last Plasma 5 release and continues in bugfix-only mode.

For people who want to hack on Plasma features this raises the obvious question: How do I build Plasma 6 to hack on it?

Before diving into this, a word of warning: Current Plasma master is in no way “ready for production”. There are known-broken things and things may temporarily regress at any time. That said, the only way to get towards a stable thing is to dig in and fix things. So let’s see how to do that.

For this explanation I’m assuming you have build KDE software with kdesrc-build before. If not we have some extensive documentation for that. First you need at least Qt 6.4 installed. The usually best way to get that is from your distribution. If your distribution does not have Qt6 packaged yet please complain^Wtalk to them. CMake should complain about any missing Qt6 modules/development files, but make sure you have the qtpaths tool installed beforehand. It should be named something like qtpaths6 or qtpaths-qt6.

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