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[1], 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 DEPEND/RDEPEND. 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. [1] https://archives.gentoo.org/gentoo-dev-announce/message/618f39bce863911d8955ee9f83636ca4"
