Kubuntu 23.04 and missing libqtchartsqml2plugin.so

[ilkant]

I just updated Kubuntu 22.10 -> 23.04. When I tried to compile Stellarium on my computer

$ cmake -DCMAKE_INSTALL_PREFIX=/opt/stellarium ../..

CMake Error at /usr/lib/x86_64-linux-gnu/cmake/Qt6Qml/QmlPlugins/Qt6qtchartsqml2Targets.cmake:96 (message):
The imported target "Qt6::qtchartsqml2" references the file

 "/usr/lib/x86_64-linux-gnu/qt6/qml/QtCharts/libqtchartsqml2plugin.so"

but this file does not exist.

That file is not in Kubuntu's apt repository too. With Kubuntu 22.10 compiling was succesfull.

[10110111]

Debian provides this file in qml6-module-qtcharts package. If Ubuntu doesn't, it's a question to Ubuntu's packagers.

[ilkant]

Ubuntu repository has

http://fi.archive.ubuntu.com/ubuntu lunar/universe amd64 qml6-module-qtcharts amd64 6.4.2-2 [26,7 kB]

Now message is:

CMake Error at /usr/lib/x86_64-linux-gnu/cmake/Qt6Qml/QmlPlugins/Qt6quick3dspatialaudioTargets.cmake:96 (message):
The imported target "Qt6::quick3dspatialaudio" references the file

 "/usr/lib/x86_64-linux-gnu/qt6/qml/QtQuick3D/SpatialAudio/libquick3dspatialaudioplugin.so"

but this file does not exist.

[10110111]

Try using apt-file to find it.

[gzotti]

I wonder why it is even looking for anything QML.

[ilkant]

I removed Indi PPA and I remove packets from there. And perhaps whole KStars.

$ sudo add-apt-repository --remove ppa:mutlaqja/ppa

Now I have other activity and I continue with this issue some hours later. Thank you.

[alex-w]

Please check https://github.com/Stellarium/stellarium-ppa/blob/qt64/debian/control

[ilkant]

File CMakeCache.txt in stellarium/build/unix/ directory contains lines:

//Define whether the Scenery3d plugin should be created.
USE_PLUGIN_SCENERY3D:BOOL=1

Is this ok? Does that setting cause Qt Qml errors? And which process produces CMakeCache.txt file?

[10110111]

AFAIK, nothing in desktop Stellarium uses QML. And CMakeCache.txt is produced by cmake that you run before building.

[alex-w]

QML may be added as an dependency for QWidgets stuff

[gzotti]

Usually programs use either traditional widgets or more recent QML. Mixing is possible (see examples), but a dependency of the older system on the newer sounds very unlikely.

[gzotti]

You can try to deselect all optional parts, plugins (USE_PLUGIN_*:BOOL=0), Multimedia, XLS, ... to identify the critical component. However, given that it works on Kubuntu 22.10, and not on 23.04, this sounds like a Kubuntu 23.04 config/package issue that should be reported there.

[ilkant]

Thank you helping me! I found libquick3dspatialaudioplugin.so from Ubuntun package qml6-module-qtquick3d-spatialaudio. Then cmake worked without errors and compilation produced Stellarium verison 23.1.117-96f9d30 [master]. It's compiled today 27th April 2023.

Next task to me could be to see Stellarium code observe list exporting and importing. And I can try to solve that. But I am not very competent of Stellarium code. :) I think that he who has coded Stellarium, does it much more efficiently and quickly.