databases/mysql*-[server|client] and security/trousers (a dependency of security/gnutls) both define the symbol my_init. This causes trouble for ports that try to link against both mysql and gnutls, such as audio/amarok-kde4 (if one of its many dependencies has been configured to use security/gnutls).
The fix is available upstream:
over to maintainer
Ping? It's still affecting Amarok users, and the fix in trousers looks simple enough.
A commit references this bug:
Date: Wed Aug 6 06:39:22 UTC 2014
New revision: 364153
Remove reference to my_init and my_fini. These functions were causing
symbol conflicts with other software like MySQL.
Sorry for the delay. Fixed in r364153. Thank you for your report.