Please add ppc64 keyword for sys-libs/musl. Build log to follow, but successfully ran a full stage1-3 catalyst run on Power9 VPS - see https://files.emjay-embedded.co.uk/unofficial-gentoo/powerpc-stages/hardened/musl/ .
we now have musl profiles and almost have a catalyst stage, to get real stage done we need moar keywords, this is the first one obviously. default/linux/ppc64/17.0/musl default/linux/ppc64/17.0/musl/hardened default/linux/ppc64le/17.0/musl default/linux/ppc64le/17.0/musl/hardened the following profiles merged, (exp and disabled for now)
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=931d4b0d870f9db8e9fd8be9e38ee7a25f7a8ecb https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f9af1c96cd70a4881487de9ea064cc674014257f