CMake Ubuntu AUTOUIC not working?

VRonin

I'm running into a weird issue, I have a CMake project that works both in Windows and MacOS but fails in Ubuntu Xenial with the message:

CMake Error at demo/CMakeLists.txt:29 (add_executable):
  Cannot find source file:
    MainWindow.ui

I use g++6.5 and CMake 3.12.4 so i can't think of a reason why it's going wrong.

Full log available here

J.Hilk

@VRonin
any chance this could be related to

https://bugreports.qt.io/browse/QTBUG-72641

there was an error in qmake and unresolved dependencies at runtime, the error targeted MacOS, but KaiKoehne brought the issue up, if cmake handles the issue.
AFAIK noone checked that.

VRonin

I tried to downgrade to 5.11 and same result so I suspect it's not a Qt bug but something in my code