Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!purdue!haven!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn )
Newsgroups: comp.unix.questions
Subject: Re: Telling csh about multiple, machine-dependent libraries
Message-ID: <8991@smoke.BRL.MIL>
Date: 27 Nov 88 13:19:26 GMT
References: <142@minya.UUCP>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 17

In article <142@minya.UUCP> jc@minya.UUCP (John Chambers) writes:
> I wonder what "class" and "ident" do?  The cpp(1) page doesn't mention them.

#class indicates that the "classes preprocessor" is to be run.
This support for "C with classes" is now obsolete; it has been
replaced by C++.

#ident "string" causes the string to be placed in a special ident
record in the object module, so that it can be found by "what"
without wasting space in the actual load image.  This is an AT&T
innovation.

Neither #class nor #ident, nor system-dependent predefined macros
not starting with at least one underscore, are allowed in a C
implementation that conforms to the proposed ANSI standard.

#elif (not shown in your list) is required.