On Mon, Feb 16, 2015 at 12:52 AM, Walter Dnes <waltdnes@waltdnes.org> wrote:

> On Sat, Feb 14, 2015 at 02:46:01PM +0200, Alexander Kapshuk wrote
> >
> > I didn't know that. Thanks. I seem to have quite a few in my world file
> at
> > the moment. I didn't put any of them in there by hand though, to the best
> > of my knowledge.
> >
> > grep -i libs /var/lib/portage/world
> > dev-libs/glib
> > dev-libs/libevent
> > dev-libs/libyaml
> > media-libs/gst-plugins-base
> > media-libs/gst-plugins-base:0.10
> > media-libs/gstreamer
> > media-libs/gstreamer:0.10
> > media-libs/libpng
> > media-libs/libpng:1.2
> > media-libs/libpng:1.5
> > media-libs/libv4l
> > media-libs/webrtc-audio-processing
> > sys-libs/gpm
>
>   As Peter has noted, you probably updated most of these files manually
> without supplying the "-1" (or "--oneshot") option.  I do know that
> sys-libs/gpm must be in world if you want a text-console mouse-pointer,
> because it's a user-selected install.  I checked on my system.  The
> following are on my system, but not in world.
>
> dev-libs/glib
> dev-libs/libevent
> media-libs/libpng (=media-libs/libpng-1.6.16)
>
>   If you've emerged any package with the "gstreamer" flag, then...
>
> media-libs/gst-plugins-base
> media-libs/gst-plugins-base:0.10
> media-libs/gstreamer
> media-libs/gstreamer:0.10
>
> ...don't belong in world.  If you want to clean up world safely, I
> suggest the following...
>
> 1) make a backup of /var/lib/portage/world
>
> 2) edit /var/lib/portage/world, by removing the following lines...
>
> dev-libs/glib
> dev-libs/libevent
> media-libs/libpng
> media-libs/libpng:1.2
> media-libs/libpng:1.5
> media-libs/gst-plugins-base
> media-libs/gst-plugins-base:0.10
> media-libs/gstreamer
> media-libs/gstreamer:0.10
>
> 3) run the command "emerge -p --depclean" and post the output back here
> before doing anything more.
>
> --
> Walter Dnes <waltdnes@waltdnes.org>
> I don't run "desktop environments"; I run useful applications
>
>
Thanks for your reply.

What I've done on two of my gentoo systems is, what had been suggested in
one of the earlier replies to this thread. I ran emerge -C `grep -i libs
/var/lib/portage/world`, followed by emerge @preserved-rebuild.
While on another one of my systems I tried emerge --deselect `grep -i libs
/var/lib/portage/world`, followed by emerge --depclean.

As a result, I no longer have any libs in my world set.

I should probably put sys-libs/gpm back into the world set via emerge
--noreplace, based on what you said about the package.

I should probably look into what does and what doesn't have to go into the
world file. Up until recently I assumed that portage would figure that out
for me.