Re: [gentoo-user] coexisting GCC versions

[Volker Armin Hemmann]

On Sonntag 28 Juni 2009, Alan McKinnon wrote:
> On Sunday 28 June 2009 05:47:23 Volker Armin Hemmann wrote:
> > On Sonntag 28 Juni 2009, Alex Schuster wrote:
> > > Volker Armin Hemmann writes:
> > > > On Sonntag 28 Juni 2009, Alex Schuster wrote:
> > > >> Or keep 4.3 as default, I don't think you could run into problems.
> > > >
> > > > he will over time. If you switch default compiler emerge -s world has
> > > > to be done.
> > >
> > > According to Alan McKinnon's (and my own experience), this is not
> > > necessary, unless there are ABI changes. But there were none between
> > > 4.1 and 4.3.
> > >
> > > http://www.mail-archive.com/gentoo-user@l.g.o/msg83724.html
> > >
> > >         Wonko
> >
> > you don't have to compile between 4.2.0 and 4.2.1 - sure.
> >
> > But with 4.2 to 4.3 I only got a stable system after compiling everything
> > with the same compiler. So whatever Alan says - I know how borked my box
> > was with half of the libs compiled by one compiler and the rest by the
> > other.
>
> That's interesting. I run ~amd64 here and update almost daily - so I got
> practically every gcc version that hit the tree since 3.3 at some stage.
> And I never had the problem you describe.

yeah, me too ;)

>
> It's likely that you have a set of libs that indeed *are* sensitive to
> different gcc versions, and I'm not using those libs (so I don't get the
> problems).

probably, yes.

>
> I wonder if it would be worth the effort to investigate this further and
> isolate problem packages.

I don't really think so. emerge -e system or emerge -e world aren't such hard 
to type - and you can do it in the background. Just open all apps you plan to 
use in the next couple of hours ;)