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From: grt@twitch.UUCP ( G.R.Tomasevich)
Newsgroups: net.lang.c
Subject: #if foo vs #if defined(foo)
Message-ID: <379@twitch.UUCP>
Date: Wed, 25-Jun-86 08:22:56 EDT
Article-I.D.: twitch.379
Posted: Wed Jun 25 08:22:56 1986
Date-Received: Fri, 27-Jun-86 07:03:55 EDT
References: <1586@brl-smoke.ARPA>
Organization: AT&T Bell Labs, Holmdel
Lines: 16
Keywords: Sys 5.2

Our compiler does not need a defined(), or at least I did not try whether
it is even accepted.  The following example works fine:

#if squat||foo
int yes;
#else
int no;
#endif
main() {}

if the 'cc' command includes either '-Dsquat' or '-Dfoo', then 'yes' is
selected, else 'no' is selected.  E.g.: 'cc -Dfoo -E c.c'
System: VAX-11/785 running UNIX 5.2
-- 
	George Tomasevich, ihnp4!twitch!grt
	AT&T Bell Laboratories, Holmdel, NJ