xxdiff is a graphical file and directories comparator and merge tool.
If you have not already done so, install the its-release package that grants access to ITS’s yum repository.
Then install as follows:
% sudo yum install xxdiff-unc
Files are installed in /opt/unc.
The latest version available is xxdiff 4.0.1 Vendor release date: May 15, 2016.
This package can be managed using the lpm command.
% lpm load xxdiff
will set the PATH environment variable so that the xxdiff binary can be accessed.