From: hengist podd <has.temp3@...>
Date: 2009-02-03T21:07:36+09:00
Subject: Re: How to tell if one is running 32 or 64 bit Ruby on Mac O

Wes Gamble wrote:
> All,
> 
> A friend just bought a new Mac and is trying to figure out whether they
> have 32 or 64 bit Ruby installed.  This is the output of "file `which
> ruby`":
> 
> /usr/bin/ruby: Mach-O universal binary with 2 architectures
> /usr/bin/ruby (for architecture ppc7400):       Mach-O executable ppc
> /usr/bin/ruby (for architecture i386):  Mach-O executable i386
> 
> Can't really tell from this.  Does anyone know definitively if Mac OS X
> is still shipping with a 32 - bit version of Ruby or if there is a way
> to check?

The stock Ruby 1.8.6 installation on 10.5 consists of a 4-way fat (ppc + 
ppc64 + i386 + x86_64) framework build which you'll find in 
/System/Library/Frameworks, with a 32-bit fat command line interpreter 
symlinked to /usr/bin/ruby. This means Ruby will run as 32-bit in 32-bit 
processes (e.g. when running scripts via /usr/bin/ruby) and as 64-bit in 
64-bit processes.

HTH

has
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