openEMS.de

Are you sure you have the latest version? Because all of that mentioned in the link "should" be already fixed? As I said, it builds fine for me with vtk 9.0.x and 9.1 as it is... As for vtk, why is "VTK_QT_VERSION" not set in cmake for your vtk build? This is not related to openEMS at all. But as I ...

What breaking changes in vtk? It builds fine for me with vtk 9.1

And I'm still puzzled to why "VTK_QT_VERSION" is not set for your vtk? I have never seen that and really questioning if your vtk is build correctly.

Yes I understand, but then I don't know why the required Qt version cannot be read.
In any case, try to remove this from the if clause and see what happens...
In future openEMS will drop older vtk and qt4 support in any case.

Well then the gentoo vtk build is without qt5 support which makes it useless for this ...

Well that sounds to me like vtk was build without a Qt binding... That is not good and cannot be used for the openEMS GUI...

well in QCSXCAD/CMakeList.txt this line: if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4") was false, which means vtk requested a "VTK_QT_VERSION" not greater than 4... This can only mean, your vtk was build with a qt4 binding or maybe a missing qt binding... You can mayb...

Then this can only mean that this vtk was build against Qt4?
That would be very weird???
What Linux is this? Did you use vtk coming with the distro?
I'm really lost how this can be possible...

Well cmake must have found a very old vtk version (<6.4)
Please check which one and maybe why...

Well it always was the plan to make the python interface fully equal to the Matlab/Octave one... But it was always the plan that users could/would help on this too ;) So feel free to have a look at how the ports are done in general and I would happily have a look at your attempt ;) best regards Thor...

Did you try the latest github version of openEMS?
Which vtk version is installed?