Currently mysql-5.6 build quite well, but we still have problems with postinst scripts.
Up to mysql-5.5 mysqld could be started with --bootstrap option to pass SQL queries which does not seem to work any more. Therefor I believe that we have to rewrite postinst from scratch.
To cover all scenarios I've started a small and :ugly: workflow diagram (libreoffice)
As I do not see any option to attach files within moinmoin here they are