[R-SIG-Mac] Change Rscript to 64-bit

[Simon Urbanek]

On Feb 23, 2013, at 8:45 AM, Alton Ing wrote:

> Hi Simon,
> 
> I completely agree with you. However, on my 64-bit Mac Book Pro Retina
> with Mountain Lion 10.8.2:
> 
> Rscript -e 'sessionInfo()$platform'
> [1] "i386-apple-darwin9.8.0/i386 (32-bit)"
> 
> file `which Rscript`
> /usr/bin/Rscript: Mach-O universal binary with 2 architectures
> /usr/bin/Rscript (for architecture i386):	Mach-O executable i386
> /usr/bin/Rscript (for architecture x86_64):	Mach-O 64-bit executable x86_64
> 
> file -h `which Rscript`
> /usr/bin/Rscript: symbolic link to
> /Library/Frameworks/R.framework/Resources/bin/Rscript
> 
> How can I get Rscript to DEFAULT to 64-bit mode like your computer?
> 

Ah, hold on - you are on Mountain Lion and you may have installed R with 32-bit default since 10.8 was omitted from the list of supported 64-bit systems at the time - try installing latest R 2.15.3 RC from
http://r.research.att.com/

As a side note, I suspect that the architecture is actually irrelevant since Rscript as it turns out is just calling the R script but without setting R_ARCH so that is the R shell script that decides the architecture. So I have to apologize, I was wrong, it doesn't behave the way it should. We probably want to have Rscript pass the arch on if not set explicitly.

Thanks,
Simon


> -Alton
> 
> On Sat, Feb 23, 2013 at 5:29 AM, Simon Urbanek
> <simon.urbanek at r-project.org> wrote:
>> 
>> On Feb 23, 2013, at 5:38 AM, Alton Ing wrote:
>> 
>>> To get Rscript running in 64-bit mode on your 64-bit Mac OS X (Mountain Lion):
>>> 
>>> sudo ln -s /Library/Frameworks/R.framework/Resources/bin/Rscript
>>> /usr/bin/Rscript32
>>> sudo rm /usr/bin/Rscript
>>> sudo echo '/Library/Frameworks/R.framework/Resources/bin/Rscript
>>> --arch=x86_64 "$@"' > /usr/local/bin/Rscript64
>>> sudo cp /usr/local/bin/Rscript64 /usr/bin/Rscript
>>> sudo chown root:admin /usr/bin/Rscript
>>> sudo chmod 775 /usr/bin/Rscript
>>> 
>> 
>> This is probably the worst possible way to go about this - so readers please be warned - you really don't want to do that.
>> 
>> We do provide Rscript in both variants so if you really want to force the one or another into /usr/bin/Rscript, just symlink the architecture you want.
>> 
>> Cheers,
>> Simon
>> 
>> 
>> 
>> 
>> 
>>> If your old scripts encounter problems try using /usr/bin/Rscript32
>>> instead. Otherwise, you can revert /usr/bin/Rscript back using:
>>> sudo rm /usr/bin/Rscript
>>> sudo ln -s /Library/Frameworks/R.framework/Resources/bin/Rscript
>>> /usr/bin/Rscript
>>> 
>>> -Alton
>>> 
>>> 
>>> On Fri, Feb 22, 2013 at 10:57 PM, Prof Brian Ripley
>>> <ripley at stats.ox.ac.uk> wrote:
>>>> On 23/02/2013 04:32, Alton Ing wrote:
>>>>> 
>>>>> How can we change Rscript to execute in 64-bit?
>>>>> 
>>>>> The following script prints "i386-apple-darwin9.8.0/i386 (32-bit)" :
>>>>> 
>>>>> #!/usr/bin/env Rscript
>>>>> sessionInfo()$platform
>>>>> 
>>>>> I want to run RHadoop (rmr2) locally on Mac OS X 10.8.2 (Mountain
>>>>> Lion) but it only works with Rscript in 64-bit mode.
>>>> 
>>>> 
>>>> Where is that one from (we can't tell?)
>>>> 
>>>> On a CRAN installation
>>>> 
>>>> /Library/Frameworks/R.framework/Resources/bin/exec/x86_64/Rscript
>>>> 
>>>> is 64-bit.  And you can always run "Rscript --arch=x86_64" (not using env,
>>>> though).
>>>> 
>>>> 
>>>> 
>>>> --
>>>> Brian D. Ripley,                  ripley at 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
>>>> 
>>>> 
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>>>> R-SIG-Mac at r-project.org
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>>> 
>>> _______________________________________________
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>>> 
>>> 
>> 
> 
>