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Date: Fri, 25 Jan 2002 13:02:55 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: djgpp AT delorie DOT com
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CC: "Ed Collins" <emacduffie AT mediaone DOT net>
In-reply-to: <fc448.31147$pm1.5503094@typhoon.jacksonville.mediaone.net>
	(emacduffie AT mediaone DOT net)
Subject: Re: preprocesser directives
References:  <fc448.31147$pm1 DOT 5503094 AT typhoon DOT jacksonville DOT mediaone DOT net>
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> From: "Ed Collins" <emacduffie AT mediaone DOT net>
> Newsgroups: comp.os.msdos.djgpp
> Date: Fri, 25 Jan 2002 03:22:51 GMT
> 
> My question is, Does anyone know of any preprocessor directives
> I can write in a computer program to distinquish between DOS and UNIX?

If you are using DJGPP, the answer to this is in section 8.7 of the
DJGPP FAQ list.