Would you mind trying trunk, or do you have a special need for NewPascal ?
Thank you for the suggestion.
Already tried trunk, no changes; the installer keeps building Lazarus and LCL using GTK2 and it looks extremely ugly under Plasma.
Do I have to use - besides the -qt5 fpcupdeluxe installer - anything else to make it build Lazarus and LCL for QT5?
One thing I'd like to also report (probably you know it): on the -qt5 fpcupdate Linux package, the use has to keep moving the mouse over the log output area in order to keep building, otherwise the system hangs. I experienced this behaviour also with CodeTyphon QT5 version, so it must be something that has to do with QT5 only (on QT4 no such behaviour exists).