安装mysql时候的Your machine must NOT be named localhost错误

gentoo上安装mysql
emerge --config =dev-db/mysql-5.1.51的时候 出现下面的
Your machine must NOT be named localhost错误

# emacs /etc/conf.d/hostname
HOSTNAME="mockhost"
# emacs /etc/hosts
127.0.0.1 mockhost localhost
# hostname mockhost
# hostname -f