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Date: Wed, 24 Dec 1997 14:19:01 +0200
From: Nadav Eiron <nadav@barcode.co.il>
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Subject: Re: "__P"
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Alexander Karpov wrote:
> 
> What is __P in FreeBSD sources? It's MACRO?
> 
> Thanks, Alex.

Yeah, it's a #define, designed to make prototypes work even when
compiling on old K&R style compilers (i.e. when prototypes should not
include the parameters). When used on an ANSI-C compiler it can be
ignored , i.e. int foo(__P((char *bar))) is just like 
int foo(char *bar).

Nadav