On Sun, 9 Dec 2012 11:01:37 -0600, Bruce Hill wrote:

> > > What is @preserved-rebuild ?  
> > 
> > It is a portage set, hence the @ prefix, containing packages that
> > need to be rebuilt in order to link them against the installed
> > versions of libraries.
> >   
> > > workstation ~ # emerge -a @preserved-rebuild
> > > emerge: 'preserved-rebuild' is an empty set
> > > emerge: no targets left after set expansion  
> > 
> > So you have nothing that needs rebuilding. Portage will warn you when
> > the set it non-empty, telling you to run emerge @preserved-rebuild.
> > There is no need to run it at any other time.

> This alias is run with coffee every morning on 8 Gentoo installs on
> this LAN: alias ud='eix-sync && emerge -aDjNuv @world && dispatch-conf
> && emerge -a --depclean && revdep-rebuild -i && clear && exit'
> 
> So I'd venture to say there never will be such a set (must one create
> it?).

The set is created when needed, but the emerges triggered by
revdep-rebuild will clear it. However, if you read the full thread, you
will see the reasons why reserved-rebuild is the preferred usage. It
avoids breakage and is much faster, and you can always run revdep-rebuild
after to be absolutely sure.

However, because portage keeps the old libraries around for
preserved-rebuild, to avoid breakage, revdep-rebuild may fail to rebuild
all necessary packages.


-- 
Neil Bothwick

Ask a silly person, get a silly answer