On 11/22/18 1:50 PM, Gilles Caulier wrote:
> OpenCV > 3.x is not yet supported.
>
> Only OpenCV 3.x is supported. There is no plan to port all code to
> openCV 4 for the moment.
Opencv 4.0.0-4 is now in Arch Linux testing
They compiled digikam 5.9 with opencv 4 !!!
https://www.archlinux.org/packages/testing/x86_64/digikam/Otherwise, I compiled digikam git r41326 successfully with opencv 3.4.4-1 :)