I've just updated from 5.1.70 and replaced /etc/mysql/my.cnf with default one provided with 5.5.39. It contains these lines: # Uncomment this to get FEDERATED engine support #plugin-load=federated=ha_federated.so loose-federated When mysqld start it print this to log: [Warning] /usr/sbin/mysqld: unknown option '--loose-federated' So I suppose this line should be removed (or fixed) from default my.cnf.
+ 28 Aug 2014; <grknight@gentoo.org> -files/mysql-5.5.32-Werror.patch, + files/my.cnf-5.5: + Cleanup old patch and remove warning for bug 519630 + No revbump needed as this is only a warning and easily changed by an admin.