gentoo dev-db/mysql-5.5 не стартует

Несомненно же, ты обратил внимание на то, что

# Mask 5.5/6.0 series that are alpha and and crazy experimental.

Несомненно, ты так же прочитал, что написал ебилд после установки, и несомненно сделал, что просили.

П.С не для танкистов

   # Minimal builds don't have the MySQL server
        if ! use minimal ; then
                docinto "support-files"
                for script in \
                        support-files/my-*.cnf \
                        support-files/magic \
                        support-files/ndb-config-2-node.ini
                do
                        [[ -f "${script}" ]] \
                        && dodoc "${script}"
                done

                docinto "scripts"
                for script in scripts/mysql* ; do
                        [[ -f "${script}" ]] \
                        && [[ "${script%.sh}" == "${script}" ]] \
                        && dodoc "${script}"
                done

                einfo
                elog "You might want to run:"
                elog "\"emerge --config =${CATEGORY}/${PF}\""
                elog "if this is a new install."
                einfo

                einfo
                elog "If you are upgrading major versions, you should run the"
                elog "mysql_upgrade tool."
                einfo
        fi

        if pbxt_available && use pbxt ; then
                # TODO: explain it better
                elog "    mysql> INSTALL PLUGIN pbxt SONAME 'libpbxt.so';"
                elog "    mysql> CREATE TABLE t1 (c1 int, c2 text) ENGINE=pbxt;"
                elog "if, after that, you cannot start the MySQL server,"
                elog "remove the ${MY_DATADIR}/mysql/plugin.* files, then"
                elog "use the MySQL upgrade script to restore the table"
                elog "or execute the following SQL command:"
                elog "    CREATE TABLE IF NOT EXISTS plugin ("
                elog "      name char(64) binary DEFAULT '' NOT NULL,"
                elog "      dl char(128) DEFAULT '' NOT NULL,"
                elog "      PRIMARY KEY (name)"
                elog "    ) CHARACTER SET utf8 COLLATE utf8_bin;"
        fi

        mysql_check_version_range "4.0 to 5.0.99.99" \
        && use berkdb \
        && elog "Berkeley DB support is deprecated and will be removed in future versions!"
}