Andrew Ferris wrote:
> Hello,
>
> I've been asked to get R (2.4.1) installed on a IBM p570 server. This is a 
> server with power CPUs and is running SLES 10. It currently has 12GB of RAM 
> so I'd like to make sure I have the 64 bit version of R so as to take 
> advantage of the extra memory. Since it's a power CPU server that means I'll 
> have to compile R from source. 
>
> I've searched the r_users list but most of the power CPU correspondence 
> concerns either AIX or Macs. SLES 10 uses GCC 4.1.0 by default. Could someone 
> please help me with some guidance on the necessary parameters for configure 
> to ensure a 64 bit version of R is compiled? 
>  
>
>   
Just running the 64bit version of the OS usually suffices (at least on 
Linux variants). Easiest check on a running R is

 > .Machine$sizeof.pointer
[1] 4

which gives 8 on 64-bit builds.

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