I'm testing a copy of 5.9 plus files/ardour-4.x-revision-naming.patch in my overlay (layman -a xmw).
commit 5b223dde216143c41b865b2ce8c737aad5fb11b6 (HEAD -> master, origin/master, origin/HEAD) Author: Michael Weber <michael@xmw.de> Date: Sat Jul 29 12:03:25 2017 +0200 media-sound/ardour: version bump (bug 626514). Package-Manager: Portage-2.3.6, Repoman-2.3.3 Manifest-Sign-Key: 0x71D573A82F434065