Date: Thu, 6 Sep 2007 15:25:52 -0400 From: Yan <rottled@gmail.com> To: "Luigi Rizzo" <rizzo@icir.org> Cc: current@freebsd.org Subject: Re: how to tell 64 vs 32 bit architecture ? Message-ID: <54b90fdf0709061225q48af11c2yca8d330eff514159@mail.gmail.com> In-Reply-To: <20070906111028.A83649@xorpc.icir.org> References: <20070906111028.A83649@xorpc.icir.org>
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Perhaps "if(sizeof(void*)==4) { /* 32 */} else if(sizeof(void*) ==8) { /* 64
*/ }" ?
Or do you need something for the preprocessor?
-yan
On 9/6/07, Luigi Rizzo <rizzo@icir.org> wrote:
>
> hi,
> i was wondering what is the proper way to tell a 64 vs 32 bit
> architecture.
>
> I see that some code in sys/ uses ' #ifdef __LP64__ ' but i am not
> sure if this is generic enough (ie not gcc or FreeBSD specific),
> and also suitable for userland (i.e. works on linux or other platforms
> as well).
>
> cheers
> luigi
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