We've got a bunch of these bugs still left, a lot of them just need stabilisation where a fix was added.
Original text from grknight:
"THIS IS A MASS FILING TO ALL PACKAGE WITH A DEPEND ON virtual/mysql
As was announced on the gentoo-dev-announce mailing list,
virtual/mysql is no longer viable to depend on providing the client libraries
or the mysql_config tool.
Most uses of DEPEND="virtual/mysql" (or conditionals based upon it) will not
work in the future.
If this package (optionally) depends on libmysqlclient.so* or mysql_config for
building, you will need to have dev-db/mysql-connector-c as the DEPEND/RDEPEND.
If this package (optionally) depends on libmariadb.so* or mariadb_config for
building, you will need to have dev-db/mariadb-connector-c as the
If this package requires the server running locally, virtual/mysql is
acceptible for RDEPEND and only in DEPEND when tests demand it.
The rare exception when server only files are required at build time should you
keep a compatible server listed.
After 60 days, roughly mid-October 2018, remaining packages will be forcefully
changed to mysql-connector-c with little or no testing. The server packages
will drop their compatibility DEPEND shortly after.