Re: [gentoo-user] Re: multilib - do I need it?

[covici@ccs.covici.com]

Alan McKinnon <alan.mckinnon@gmail.com> wrote:

> On 03/04/2015 18:48, covici@ccs.covici.com wrote:
> > Grant Edwards <grant.b.edwards@gmail.com> wrote:
> > 
> >> On 2015-04-03, Walter Dnes <waltdnes@waltdnes.org> wrote:
> >>> On Thu, Apr 02, 2015 at 02:12:40PM -0300, Francisco Ares wrote
> >>>> Hi,
> >>>>
> >>>> How does one know previously which packages will require 32 bit ABI ?
> >>>>
> >>>> I have two systems (among others) to consider: one is very simple, built
> >>>> using as fewer packages as possible, it is the development system for an
> >>>> embedded equipment, and it is 64 bit ABI only - no multilib;  the other is
> >>>> a general purpose workstation, with lots of packages, and someday, by some
> >>>> forgotten reason, I needed to install emul-linux-* .
> >>>
> >>>   Can you attach your /var/lib/portage/world file to a post here?  I
> >>> assume you have nothing embarressing in it.  Almost all applications
> >>> that used to require 32-bit emulation now run natively on 64-bit
> >>> no-multilib.  I recently upgraded a 7+ year old machine from 32-bit
> >>> Gentoo to 64-bit-only Gentoo (no-multilib) and I don't have any apps
> >>> with problems as 64-bit only.
> >>
> >> The only two 32-bit apps I've run into on my various XFCE machines are
> >> grub-legacy (which requires a 32-bit ncurses lib), and acroread (which
> >> requires 100+ 32-bit libraries).
> > 
> > hmmm, I have 7 emul-linux86 packages, but portage did not offer to
> > replace them when I checked today for a world update -- I didn't want to
> > remove them manually, I thought it might do more harm than good.  I am
> > not sure whether I need any 32-bit libraries, although I do have
> > multilib enabled, but I wonder about those emul-linux-x86 packages.  Any
> > way for me to tell what is going on here such as dependencies on 32-bit
> > libraries?
> 
> It's safe to remove emul-linux-x86-* to see what happens next; and
> fixing it is trivial. So:
> 
> - remove those packages
> - fiddle make.conf
> - emerge world using -p and inspect the list
> 
> If you don;t like what you see, revert your edits and remerge
> emul-linux-x86-*. They are binary packages so the emerge is rather
> quick. As long as you didn't re-merge anything else in the interim,
> nothing will break

OK, thanks.

-- 
Your life is like a penny.  You're going to lose it.  The question is:
How do
you spend it?

         John Covici
         covici@ccs.covici.com