Version 2.2.1 is available upstream. Please consider updating! It seems that version 2.2.1 is available upstream, while the latest version in the Gentoo tree is 2.1.0. You think this warning is false? Read more about it here.
The ScaLAPACK (or Scalable LAPACK) library includes a subset of LAPACK routines
redesigned for distributed memory MIMD parallel computers. It is currently
written in a Single-Program-Multiple-Data style using explicit message
passing for interprocessor communication. It assumes matrices are laid out
in a two-dimensional block cyclic decomposition.