Your machine must NOT be named localhost
If you receive error similar to this one (in this case during mysql installation):
* ERROR: dev-db/mysql-5.0.60-r1 failed.
* Call stack:
* ebuild.sh, line 49: Called pkg_setup
* ebuild.sh, line 1244: Called mysql_pkg_setup
* mysql.eclass, line 481: Called die
* The specific snippet of code:
* [[ "${HOSTNAME}" == "localhost" ]] && die “Your machine must NOT be named localhost”
* The die message:
* Your machine must NOT be named localhost
Make sure you have hostname variable set in /etc/conf.d/hostname file