Updating top-level autoconf to 2.59

[Daniel Jacobowitz]

On Fri, Feb 09, 2007 at 04:13:43PM +0000, Maciej W. Rozycki wrote:
>  I see, though frankly I wouldn't consider switching from 2.59 to 2.61 too 
> much of a project.  And certainly much less than doing the 2.13 to 2.59 
> conversion at the top level.  Of course in 2.61 there may be different 
> bugs than in 2.59, but I gather the new version is not meant to imply any 
> kind of revolution.  Even if there were some subtle problems somewhere, 
> they should get sorted out as things go by stage 3.
> 
>  Or is it because of the new structure of install directories?

There's simply too many directories.  We'd want to upgrade all of src
and gcc at once.

And yes, there are some troublesome changes - like, if you don't adjust
your makefiles, you get warnings about ignoring datarootdir.

-- 
Daniel Jacobowitz
CodeSourcery