[racket] Detecting 32/64-bit racket

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Sat Oct 29 10:31:49 EDT 2011

(oh, this might fail if we were to get a 128bit world, I suppose :)

On Sat, Oct 29, 2011 at 9:31 AM, Robby Findler
<robby at eecs.northwestern.edu> wrote:
> Another not so great way, in Racket, to tell if the current racket is
> built as a 64 bit or 32 bit executable (is that what you're wanting?)
>  ;; 64bit? : -> boolean
>  (define (64bit?) (eq? (expt 2 61) (expt 2 61)))
> I don't know if this is promised to always work going forwards, but it
> is hard for me to imagine a future where it doesn't work.
> Of course, it would be better if there were some documented API that
> would make this definitive, but until then you're probably safe with
> this.
> Robby

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