Hi,
I'm going to bump libxc to the newly released 3.0.0 version in rawhide. This introduces some changes to the API as well as a split of the libraries, which may require changes to programs compiling against libxc.
The list for the affected packages is a rather short one
$ repoquery --disablerepo=* --enablerepo=rawhide --source --whatrequires "libxc.so.1()(64bit)"|sort|uniq
ape-2.2.0-2.fc22.src.rpm cp2k-3.0-1.fc25.src.rpm elk-3.3.17-17.fc24.src.rpm exciting-10-2.fc24.src.rpm gpaw-0.11.0.13004-20.fc24.src.rpm libxc-2.1.2-6.fc24.src.rpm
I will handle the rebuilds for these packages.