On Sun, Dec 3, 2017 at 3:43 PM, <tu...@posteo.de> wrote: > 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 <dilfri...@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 <dilfri...@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 >
If they are installed, make sure they are not active, then uninstall them.
