https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91628
--- Comment #17 from Iain Buclaw <ibuclaw at gdcproject dot org> --- I have no strong preferences, if people are wanting to go with the .S file, then that's fine by me, feel free to commit (or I will if you'd prefer). I'm just noting that I've seen a patch to implement musl support on s390x. Looks like there'll be nothing conflicting though. https://gcc.gnu.org/legacy-ml/gcc-patches/2020-01/msg01806.html
