Re: [gentoo-user] downgrading gcc

[Alan McKinnon <alan.mckinnon@gmail.com>]

On Monday 20 April 2009 02:05:35 Dale wrote:
> Alan McKinnon wrote:
> > On Sunday 19 April 2009 22:18:24 Mark Knecht wrote:
> >> 2) Should I expect any problems with the system if I do
> >>
> >> emerge -e system
> >> emerge -e system   [OPTIONAL]
> >> emerge -e world
> >
> > Why would you want to do this?
> >
> > Do you suspect a toolchain API/ABI breakage between 4.1.2 and 4.3.2?
>
> He has been having trouble with mythtv, separate thread, and he has ran
> out of other options.  He was following my thread and wants to back up
> to the old version of gcc to see if that corrects his problem.  I
> suspect he would need to at least do a emerge -e mythtv to test this.  I
> don't have mythtv here but I suspect that would be just about everything
> on his system and if gcc is causing this issue, he may as well test it
> all at once.
>
> That's the reason for what he is doing.

OK, so it's sort of like Windows then - when you tried everything else and 
nothing works yet, just reinstall?

I find these difficulties people are having with X somewhat amusing - my two 
personal machines have been on ~arch since forever, and even with huge amounts 
of activity in the last 18 months on X, gcc and glibc, all upgrades have been 
as smooth as silk for me.

A possibility (speaking generically now), is that X and it's drivers and a 
bunch of other stuff all need to be compile with the same gcc. nvidia is like 
this and silently barfs if you don't. It's easy to get right with an upgrade - 
go to the latest - but a downgrade is a completely different animal (you don't 
know what you should be going back to). 



-- 
alan dot mckinnon at gmail dot com