Your package flann failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=12815553 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild
Created attachment 1124576 [details] build.log
Created attachment 1124577 [details] root.log
Created attachment 1124578 [details] state.log
Fixed includes and function name for c++11.