Proj:Perl are looking to remove Perl <5.22.3 from tree in the near future. However, polymake-2.14-r1 requires <dev-lang/perl-5.21 Please consider removing this legacy version.
commit 875619639e4d3592eb668301d2354189a32fd893 Author: Andreas K. Hüttel <dilfridge@gentoo.org> Date: Sat Feb 18 23:41:41 2017 +0100 sci-mathematics/polymake: Remove old Package-Manager: Portage-2.3.3, Repoman-2.3.1