Gentoo emerge mysql

Installing MySQL system tables...
080517 2:43:23 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295
080517 2:43:23 [Warning] option 'max_join_size': unsigned value 18446744073709551615 adjusted to 4294967295
Installation of system tables

Examine the logs in /var/lib/mysql for more information.
You can try to start the mysqld daemon with:
/usr/sbin/mysqld --skip-grant &

and use the command line tool
/usr/bin/mysql to connect to the mysql
database and look at the grant tables:

shell> /usr/bin/mysql -u root mysql
mysql> show tables

Try 'mysqld --help' if you have problems with paths. Using --log

gives you a log in /var/lib/mysql that may be helpful.

The latest information about MySQL is available on the web at
http://www.mysql.com
Please consult the MySQL manual section: 'Problems running mysql_install_db',
and the manual section that describes problems on your OS.
Another information source is the MySQL email archive.
Please check all of the above before mailing
And if you do mail us, you MUST use the /usr/bin/mysqlbug