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From: Terry Lambert <terry@lambert.org>
Message-Id: <199703042057.NAA10366@phaeton.artisoft.com>
Subject: Re: gcc question
To: guido@gvr.win.tue.nl (Guido van Rooij)
Date: Tue, 4 Mar 1997 13:57:51 -0700 (MST)
Cc: terry@lambert.org, FreeBSD-hackers@freebsd.org
In-Reply-To: <199703042032.VAA03138@gvr.win.tue.nl> from "Guido van Rooij" at Mar 4, 97 09:32:43 pm
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> > > I've got a question about interfacing between `normal' c and -traditional.
> > > 
> > > I have an API that is compiled with no -traditional flag that
> > > expects the folowing parameters:
> > > char *, char, char *
> > > 
> > > I want to call this program from within something that has to be compiled
> > > with -traditional. When I'd call this api function the secod argument
> > > will be treated differently by the -traditional program and tha API
> > > function (for which I do not have the source). My question: how can
> > > I still interface between the two, without having to write a wrapper
> > > (becasue I think that is ugly).
> > 
> > Compile the ANSI C code without a prototype in scope, and it will use
> > "traditional" stack type promotion calling conventions.
> > 
> 
> As I specifically told in my mail, I do not have the ansi c api source.

Then you must create a stub function, eg:

	/*
	 * the prototype for the real thing must be in scope for this
	 * compilation
	 */
	#include "api_header.h"

	/*
	 * Stub, compiled without prototype for stub_apicall() in scope,
	 * but *with* prototype for apicall() in scope.
	 */
	stub_apicall( xxx)
	{
		/*
		 * Calls real thing, compiled with prototype in scope
		 */
		return apicall( xxx)
	}

	...
	/*
	 * other stup_apicalls....
	 */
	...

					Regards,
					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.