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From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: comp.lang.c
Subject: Re: _sys_* etc.
Message-ID: <5513@brl-smoke.ARPA>
Date: Tue, 13-Jan-87 17:08:51 EST
Article-I.D.: brl-smok.5513
Posted: Tue Jan 13 17:08:51 1987
Date-Received: Sat, 17-Jan-87 00:50:43 EST
References: <2144@brl-adm.ARPA> <5497@brl-smoke.ARPA> <1258@ho95e.UUCP>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 14

In article <1258@ho95e.UUCP> wcs@ho95e.UUCP (Bill Stewart 1-201-949-0705 ihnp4!ho95c!wcs HO 2G202) writes:
>... why not let
>_sys_ and _machine_ be preprocessor variables, leading to
>	#define	_sys_	SysVR2
>	#define	_machine_	u3b2
>and
>	#if _machine_ = vax

Because the last line has no meaning unless the symbol `vax' is
also macro defined to something like an integer constant (further, all
possible system symbols would have to be assigned different constant
values).  (The `=' is not a string compare as in Bourne shell scripts.)

Nice try, though.