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From: nfs1165@dsacg3.dsac.dla.mil ( James L Strickland)
Newsgroups: comp.unix.wizards
Subject: Predefined Compiler Identifiers/Variables
Message-ID: <2416@dsacg3.dsac.dla.mil>
Date: 22 Aug 90 17:49:03 GMT
Organization: Defense Logistics Agency Systems Automation Center, Columbus
Lines: 14

I have run across references to predefined names/identifiers/symbols
associated with C compilers.  These appear to be things such as:
unix, vax, MSDOS, etc..., depending on the compiler.

How are these identifiers implemented on a UNIX box?  Are they
part of the compiler or in a file that is used at compile time?
How can I find out the value of the predefined identifiers for
our system?

-- 
James Strickland - Systems Programmer  jstrickland@dsac.dla.mil
Defense Logistics Agency Systems Automation Center (DSAC)
Office of Information System Facilities, AIS Software Division,
Distributed Systems (FSD)  (614) 238-9649  AV 850-9649