Your package ClanLib failed to build from source in current rawhide. https://koji.fedoraproject.org/koji/taskinfo?taskID=17710921 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1251536 [details] build.log
Created attachment 1251537 [details] root.log
Created attachment 1251538 [details] state.log
jwrdegoede's ClanLib-2.3.7-11.fc26 completed http://koji.fedoraproject.org/koji/buildinfo?buildID=860600
Fixed in rawhide, closing.