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From: Ian Collins <ian-news@hotmail.com>
Newsgroups: comp.programming
Subject: Re: 64 bit check?
Date: Wed, 03 Apr 2013 10:09:24 +1300
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bob wrote:
> Is this a foolproof way to check if your code is running in 64 bit mode?
>
> int pointer_size = sizeof(int*);
> boolean sixty_four_bit = (pointer_size==8) ? true : false;

Define a constant at compile time based on the compiler's built in flags.

-- 
Ian Collins