More and more recently we have found ourselves talking about Mir’s abstraction layer, MirAL. It turns out that this set of interfaces to Mir has advanced from being a hobby project by a Canonical developer to now being a formal project within the organization and more of Unity 8 is making use of MirAL’s API/ABI…

Source: Phoronix – The Story of Ubuntu’s Mir Abstraction Layer (MirAL)