Use one of the USES macros from
      Table 6.41, “Database USES Macros” to add a dependency
      on a database.
When a port needs the MySQL client library add
USES= mysql
See Section 17.58, “mysql” for more
	information.
When a port needs the PostgreSQL server version 9.6 or later add
USES= pgsql:9.6+ WANT_PGSQL= server
See Section 17.68, “pgsql” for more
	information.
All FreeBSD documents are available for download at https://download.freebsd.org/ftp/doc/
Questions that are not answered by the
    documentation may be
    sent to <freebsd-questions@FreeBSD.org>.
    Send questions about this document to <freebsd-doc@FreeBSD.org>.