[Rd] 64 bit R for Windows

[Luke Tierney]

On Wed, 31 Aug 2005, Duncan Murdoch wrote:

> Milton Lopez wrote:
>> Duncan:
>>
>> Thanks for your reply. Not being a part of the R world and having to assist with these purchases, I have to ask what "not yet" means. I realize that this is a difficult question to answer even for commercial software, but I am hoping you or someone else on the list may shed some additional light on the subject.
>
> I would say it will be at least a year, and most likely longer.  The
> tools used to build R haven't been ported to 64 bit Windows yet.  After
> those are done (by the MinGW project, not us), we'll need someone with a
> 64 bit Windows machine to handle builds there.
>
> Duncan Murdoch

An additional factor is that MinGW will almost certainly follow the MS
idea that long's are 4 bytes even under Win64, unlike what every other
64-bit OS does.  It will take a fair bit of time and someonw with the
motivation to do so to sort out the consequences (which may not be
very great but even establishing that may be non-trivial).

luke


>
>> Thanks in advance.
>>
>> Milton F. López
>> IT Guy
>> Inter-American Tuna Commission (IATTC)
>> 8604 La Jolla Shores Drive
>> La Jolla, CA 92037
>> Tel: (858) 546-7041, Fax: (858) 546-7133
>> mlopez at iattc.org
>> http://www.iattc.org
>>
>> -----Original Message-----
>> From: Duncan Murdoch [mailto:murdoch at stats.uwo.ca]
>> Sent: Tuesday, August 30, 2005 5:39 PM
>> To: Milton Lopez
>> Cc: r-devel at r-project.org
>> Subject: Re: [Rd] 64 bit R for Windows
>>
>> Milton Lopez wrote:
>>
>>> I am assisting in the purchase of 64-bit Windows XP system for researchers who run R. These systems will have AMD Opteron processors and at least 4GB of RAM. I'd appreciate advice on whether there is a working version of R that can take full advantage of such systems.
>>
>>
>> No, there are no 64 bit Windows versions yet.  You'll need to install
>> some 64 bit version of Linux on those machines to take full advantage of
>> the chips.
>>
>> Duncan Murdoch
>
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>

-- 
Luke Tierney
Chair, Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
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