From: Daniel Berger <Daniel.Berger@...>
Date: 2005-06-23T01:12:19+09:00
Subject: Re: How I can find out on which platform I am running (32/64 bits)?

WATANABE Hirofumi wrote:
> Hi,
> 
> "Joachim Just" <joachim.just@onlinehome.de> writes:
> 
> 
>>I wonder whether within ruby there is a method to find out on which  
>>platform my application is running.
>>
>>Unfortunately, the application has to know if it is a 32-bit or 64-bit  
>>system.
>>
>>Any hints are highly appreciated.
> 
> 
> 
> 64-bit % ruby -ve 'p [0].pack("l!").size'
> ruby 1.9.0 (2005-05-31) [x86_64-netbsd]
> 8
> 
> 32-bit % ruby -ve 'p [0].pack("l!").size'
> ruby 1.9.0 (2005-06-13) [i386-linux]
> 4

That doesn't tell me much on Solaris:

 >ruby -ve 'p [0].pack("l!").size'
ruby 1.8.2 (2004-12-25) [sparc-solaris2.10]

Ara's approach should work fine, though.

Finding the bitness of Ruby itself is easy.  Finding a cross platform 
way to find the bitness of the OS itself is another matter.  I'm not 
sure what the OP is after.

If anyone knows of a good, cross-platform way of finding the bitness of 
the OS itself, I'd like to know that myself. :)

Regards,

Dan