bump Autoconf and Libtool versions?

[Ralf Wildenhues]

* Paolo Bonzini wrote on Sun, Sep 19, 2010 at 11:11:30AM CEST:
> On 09/19/2010 11:05 AM, Ralf Wildenhues wrote:
> >any plans to bump Autoconf and Libtool versions used in GCC?
> >I'd like to see 2.68 and 2.4.0 in 4.6 in due course of course
> >(i.e., after both have been released, and before stage 1 ends).
> 
> Regarding Libtool, sure.  However, we need to ascertain if and how
> the new sysroot functionality affects GCC (in particular if the
> configure options are incompatible).

Of course.

> Regarding Autoconf, I'd rather see a further upstream release before
> upgrading, and also waiting a month after the release.  I'm not
> comfortable with forcing GCC contributors to use a release with
> known regressions (though not affecting GCC).
> 
> On the other hand, given the above plan I would be okay with
> upgrading Autoconf during early stage 3.

That sounds all very reasonable, thanks.

Cheers,
Ralf