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'
