One of mariadb or mysql must be selected.
Package-Manager: Portage-2.3.40, Repoman-2.3.9
SLOT="0.4"
KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~ppc64 ~x86"
IUSE="mysql mariadb"
-REQUIRED_USE="mysql? ( !mariadb ) mariadb? ( !mysql )"
+REQUIRED_USE="^^ ( mariadb mysql )"
MDEPEND="mysql? ( dev-db/mysql-connector-c ) mariadb? ( dev-db/mariadb-connector-c )"
DEPEND="${DEPEND} ${MDEPEND}"
SLOT="0.5"
KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~ppc64 ~x86"
IUSE="mysql mariadb"
-REQUIRED_USE="mysql? ( !mariadb ) mariadb? ( !mysql )"
+REQUIRED_USE="^^ ( mariadb mysql )"
MDEPEND="mysql? ( dev-db/mysql-connector-c ) mariadb? ( dev-db/mariadb-connector-c )"
DEPEND="${DEPEND} ${MDEPEND}"