There is an updated pull request by ndowens against master on the void-packages repository

https://github.com/ndowens/void-packages ardour
https://github.com/void-linux/void-packages/pull/26615

ardour: update to 6.4.0
Also fix ARM build; It was using host x86 flags

A patch file from https://github.com/void-linux/void-packages/pull/26615.patch is attached