[KPhotoAlbum] cmake

[Tobias Leupold]

Hi list!

I'm not a cmake expert (at all), so I have a question. I think we will have 
some optional features in the next KPA release (libkface, libkgeomap). As far 
as I understand it, cmake searches for these packages and then, the relevant 
parts of code are enabled or disabled when KPA is built.

Will it be possible to set some flags to cmake indicating that the user does 
not want e. g. libkface related features?

The background is (I do not know if anyone of you apart from me is using 
Gentoo): here on Gentoo, we use so-called USE flags for that. So e. g. you 
will be able to emerge (saying compile it and install it) KPA with saying a 
"face" or "map" USE flag. If it's set, the library is pulled as a dependency.

So if we would not be able to disable those features, the following could 
happen:

There's libkface or libkgeomap installed, but KPA is not installed with the 
relevant USE flags. Thus, portage (Gentoo's package manager) does not claim 
those to be a dependency of KPA. If cmake only checks if the libraries are 
there, the respective code will be built anyways. So if the libraries would be 
uninstalled (because all other packages needing them would be removed), this 
would break KPA.

I just wanted to ask before a release is done later and we get an upstream bug 
report about something like that.

Cheers, Tobias