Compiling Digikam

[Gilles Caulier]

Hi Marcel,

Compiling yourself OpenCV 3.4.4 is fine. I do it myself on my host
computer with more recent version.

But take a care to not mix headers installed on your system from an
older version (as 2.x for example). You can lets older binary packages
on your system, but devel packages must be removed.

If you can remove both, it's always better.

The second point is the OpenCV module to active or not. digiKam use
only few one, as OpenCV is a big puzzles. I written a bootstrap script
to start to configure the OpenCV cmake first stage with only the
strict minimum. It's here :

https://invent.kde.org/kde/digikam/-/blob/master/project/scripts/bootstrap.opencv-minimal-linux.sh

Copy this script on root directory of OpenCV source code, start it, go
to build, run make and sudo make install..

That all.

A last point : i always install OpenCV in /usr, not /usr/local, as
this last one is a little bit problematic to discover OpenCV module
detection, especially if older version still installed at the same
time.

Voilà, Don't hesitate to post future Q in this room.

Gilles Caulier

PS : have you read the dependencies section from API doc ?

https://www.digikam.org/api/index.html#externaldeps


Le mar. 31 mars 2020 à 22:57, Marcel Mathis <maeseee at gmail.com> a écrit :
>
> Hi all together
>
> I'm a professional software developer in C++. At the moment the company I'm working for has closed because of the current situation of the corona virus.
>
> Anyway, I would like to contribute to the this project in my spare time. Unfortunately I got some errors running the CMake of Digikam. I could track it down to the variable OpenCV_FOUND in core/CMakeLists.txt. On my desktop Ubuntu 18.04 is running. Anyway the package from the main repository has a too old version so I compiled openCV on my own. Executing the command "opencv_version" returns "3.4.4" (the version I compiled).
>
> Can anybody help me, that I can start working on this project? Thank you a lot in advance.
>
> Best regards
> Marcel