I've pretty much addressed all my packages except for cqrlog which I guess wasn't on the list since it will compile with gcc 5. Upstream has stated they will address gcc 6 issues on the next release.

My other two packages that I could find in your list, smesh & OCE, have both been addressed and built. Unfortunately with smesh the solution was to re-enable gnu++98. Upstream was surprised to find out it even built with gcc 5.