Re: [gentoo-user] Emerge does want to tell me...what?

[Heiko Baums <lists@baums-on-web.de>]

Am Sun, 3 Dec 2017 05:43:39 +0100
schrieb tuxic@posteo.de:

> Hi,
> 
> I started emerge -e @world
> 
> and it stops with this message:
> 
> The following mask changes are necessary to proceed:
>  (see "package.unmask" in the portage(5) man page for more details)
> # required by @selected
> # required by @world (argument)
> # /usr/portage/profiles/releases/17.0/package.mask:
> # Andreas K. Huettel <dilfridge@gentoo.org> (27 May 2017)
> # In the 17.0 profiles we assume that our system compiler uses C++14
> # or later as default language setting. This means it has to be at
> # least GCC 6. If you need an older compiler for specific purposes,
> # feel free to unmask it, however, using it for normal emerging of
> # packages is neither recommended nor supported in any way.
> =sys-devel/gcc-5.4.0-r3
> # required by @selected
> # required by @world (argument)
> # /usr/portage/profiles/releases/17.0/package.mask:
> # Andreas K. Huettel <dilfridge@gentoo.org> (27 May 2017)
> # In the 17.0 profiles we assume that our system compiler uses C++14
> # or later as default language setting. This means it has to be at
> # least GCC 6. If you need an older compiler for specific purposes,
> # feel free to unmask it, however, using it for normal emerging of
> # packages is neither recommended nor supported in any way.
> =sys-devel/gcc-4.9.4

I'd suggest you first do a clean gcc upgrade to gcc-6.4.0 or gcc-7.2.0
depending on whether you run a stable or a testing system.

https://wiki.gentoo.org/wiki/Upgrading_GCC

And then follow exactly the steps in the news item after the step of
rebuilding gcc.

Or in detail:

Run these commands:
# gcc-config -l
# gcc-config set <number of the latest gcc profile>
# emerge -1 sys-devel/gcc
# gcc-config -l
# gcc-config set <number of the latest gcc profile>
# source /etc/profile
# emerge -1 sys-devel/libtool
# gcc --version
# emerge --depclean =sys-devel/gcc-<versionnumber> [for all installed
gcc versions except for the latest (6.4.0 or 7.2.0)]
# emerge -1 sys-devel/binutils
# emerge -1 sys-libs/glibc
# emerge -e @world

Heiko