Possible arguments: (none), version, client (default), server, embedded

Provide support for MySQL. If no version is given, try to find the current installed version. Fall back to the default version, MySQL-5.6. The possible versions are 55, 55m, 55p, 56, 56p, 56w, 57, 57p, 80, 100m, 101m, and 102m. The m and p suffixes are for the MariaDB and Percona variants of MySQL. server and embedded add a build- and run-time dependency on the MySQL server. When using server or embedded, add client to also add a dependency on libmysqlclient.so. A port can set IGNORE_WITH_MYSQL if some versions are not supported.

The framework sets MYSQL_VER to the detected MySQL version.