Forgot to mention the Illuminant Profile Generator utility.
It's a simple program that doesn't get compiled by CMake, and you won't need it for normal Krita usage. It let you create your own Illuminant Profiles, using a raw Illuminant Spectrum. It depends upon GMM, GMP and Octave.

To compile it, you should go into its directory and type
.../ipg:$ sh compile

To run it, you should type
.../ipg:$ ./ipg input output

It will generate a Illuminant Profile file, that then you can put into the profile data directory of your installation.