from the logs it looks like this an cmake + python2.6 problem
Created attachment 192566 [details] emerge --info
Created attachment 192568 [details] portage compile message
Please don't CC herds on your own.
Hi BlGene, Please try the most recent version of paraview (3.6.1) in portage and see if it works for you. If it still fails, please open a new bug against paraview-3.6.1. Thanks, Markus