depends flex && optional_depends SSL '--enable-openssl' \ '--disable-openssl' \ 'crypto and ssl functionality' && optional_depends sqlite '--with-sqlite=/usr' \ '--without-sqlite' \ 'SQLite database support' && if is_depends_enabled $SPELL sqlite;then sub_depends sqlite ENABLE_UNLOCK_NOTIFY fi && optional_depends postgresql '--with-postgresql=/usr/bin/pg_config' \ '--without-postgresql' \ 'PostGresql database support' && optional_depends MYSQL '--with-mysql' \ '--without-mysql' \ 'MySql database support'