I'd like to upgrade the el7 blis package (v0.4) to the latest version
(v0.6), which has a soname bump. It's not currently required by
anything else in EPEL, and the BLAS compatibility shims won't change.
The current version has a potential security problem from using popen,
and is missing optimizations. (BLIS is what you want for AVX512 BLAS,
in particular, at least until OpenBLAS sorts that out.)