From ripley at stats.ox.ac.uk  Fri Oct 22 15:49:34 2004
From: ripley at stats.ox.ac.uk (Prof Brian Ripley)
Date: Fri Oct 22 15:49:39 2004
Subject: [Rd] 64 Bit
In-Reply-To: <x2lldyewli.fsf@biostat.ku.dk>
Message-ID: <Pine.LNX.4.44.0410221438360.6010-100000@gannet.stats>

On 22 Oct 2004, Peter Dalgaard wrote:

> Prof Brian Ripley <ripley@stats.ox.ac.uk> writes:
> 
> > R does not run under (beta) 64-bit Windows on x86_64 and we have no plans
> > to port it there, but it does run under 32-bit Windows on that processor.  
> > I am sure it will run on several 64-bit operating systems on Apple
> > Macintosh's so-called G5 hardware -- I believe we have seen a report that
> > includes an in-progress version of MacOS 10.4 -- and also several 32-bit
> > ones.
> 
> Re. Windows, the issue is that we're using the mingw32 toolkit. If
> there is ever a mingw64, I'm sure we'd attempt a port almost
> immediately. 

Not that clear.  Under Win64, long is still 32bits so quite a bit of work
will required to take advantage of a 64-bit space (starting with surgery
on the memory manager).  So we would need

	Win64 (not released yet)
	mingw64 (not promised, AFAIK)
	Suitable hardware
	A volunteer with all of the above and 
	suitable C programming skills.

I was quite serious about `no plans': last time this was raised neither 
Duncan Murdoch nor I had any such plans.

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595


[Rd] 64 Bit
Prof Brian Ripley