On Sat, 26 May 2012 17:01:26 +0400
"Nikolaj Sjujskij" <sterkrig@...> wrote:

> > So I think the second part of this (x.y to x.y+1 transitions, in the
> > Python world, are generally relatively smooth) invalidates your
> > point in the first part: if the transitions are generally smooth,
> > then yes, when Python 3.3 gets stabilized, I want all of my Python
> > packages to be available from the 3.3 interpreter.
>   Let's take a "stable" user who updates (`emerge --update --deep
> --newuse @world`) his/her system regularly.
> Python 3.3 is released, added to Portage tree and eventually unmasked.
> PYTHON_TARGETS variable is changed to include 3.3. And suddenly
> `emerge --newuse @world` on stable system suggests rebuilding of
> every package using new eclass, because new (though disabled)
> USE-flags was added. And when Python 3.3 is keyworded stable, hence
> bringing new default PYTHON_TARGETS, user should now rebuild those
> packages once more, but now, at least, not uselessly.
> 
> Just yesterday I had www-servers/uwsgi recompiled because of changed  
> RUBY_TARGETS. And I even have no Ruby installed.

I suggest you report a bug against portage and/or PMS.

-- 
Best regards,
Michał Górny