I tried both VTK 9.0.0.rc2 and VTK 9.0.0.rc3 on my Ubuntu 18.04 using CMake 3.14.4 and nothing works. There are no examples e.g. Cone* nor libQVTKWidgetPlugin.so after the build.
I thought there may be a problem with my cmake or system. I build vtk 8.2.0 and everything works. Maybe 9.0 has a bug?
Probably but I did the same as I built 8.2.0: configuring using cmake-gui, enabling example and qt and use release. Is there something different between 8 and 9 configuration I am missing?