There is a new pull request by q66 against master on the void-packages repository

https://github.com/void-ppc64/void-packages boost
https://github.com/void-linux/void-packages/pull/11479

boost: add patch for context on ppc64
This fixes the ontop_fcontext function of boost::context on ppc64.

A patch file from https://github.com/void-linux/void-packages/pull/11479.patch is attached