Unable to parse profile: '/etc/make.profile

很久没升级Gentoo了，心血来潮就升级一下，按操作手册，先emerge --sync一下
提示没有设置 gentoo profile，用命令eselest profile list ，的确显示没有选中profile，就eselect profile set 1
然后接着emerge --sync
有以下错误提示：

!!! Unable to parse profile: '/etc/make.profile'

!!! ParseError: Profile contains unsupported EAPI '5': '/usr/portage/profiles/eapi-5-files/eapi'

!!! Your current profile is invalid. If you have just changed your profile

!!! configuration, you should revert back to the previous configuration.

!!! Allowed actions are limited to --help, --info, --search, --sync, and

!!! --version.

网上逛了下，解决办法：

eselect profile set 0     #set 0 改 uclibc 库安装
emerge -u portage      #这一步是重新安装或升级安装portage都可
eselect profile set 1     #切换回正确的profile

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