Version 1.9.0 is available upstream. Please consider updating! It seems that version 1.9.0 is available upstream, while the latest version in the Gentoo tree is 1.8.0. You think this warning is false? Read more about it here.
Ginkgo is a high-performance linear algebra library for manycore
systems, with a focus on sparse solution of linear systems. It is
implemented using modern C++, with GPU kernels implemented in CUDA.