Path: utzoo!attcan!uunet!tektronix!sequent!mntgfx!archiel
From: archiel@mntgfx.mentor.com (Archie Lachner)
Newsgroups: comp.sys.apollo
Subject: Re: C++ vs Apollo Sys Files ? (Long) Compatability ?
Message-ID: <1989Mar10.125408.2077@mntgfx.mentor.com>
Date: 10 Mar 89 20:54:07 GMT
References: <1093@cheops.eecs.unsw.oz>
Organization: Mentor Graphics Corporation, Beaverton Oregon
Lines: 37

From article <1093@cheops.eecs.unsw.oz>, by ashley@cheops.eecs.unsw.oz (Ashley M. Aitken):
> Howdy, 
> 
> Just when I thought C++ would add some productivity to my existence all hell
> breaks loose (forgive me please, it is late, very late). I am having severe 
> problems with C++ and Apollo C System files compatability.
> 
> Can someone, anyone shed some light ?
> 
> The situation is as follows. I am programming in C++ Version 1.2.1 under SR10.1
> with SR10? release of C (I think). Anyway the C++ language works well so the C
> must be later that V6.00. The problems are with Header Files, that seem to be
> incompatible with this C++ (but not the C). For example ..
> 
> The following code (I know some of them ain't C++ files ie stdio.h is not ) 

We have found that the only way to insure correct compilation, linking, and
execution is to generate C++ versions of the C header files.  In practice this
means taking the Apollo header files and modifying them so that they describe
things using C++ syntax.  This is painful to do the first time, but updating
them with Apollo header-file changes is not too bad.

In general, C++ and C are two different languages.  C++ is not upward
compatible with C, not matter who says so.  The two languages can be made
link compatible, but there are thing you must do on the C++.

Writing C++ headers for the C functions you use is one of those things.

You may want to ask your Apollo representative if they have any C++ header
files for the C library.

P.S.  If you're using C++, why not use the streams package instead of stdio?
-- 
Archie Lachner
Mentor Graphics Corporation
Beaverton, Oregon
...!{decwrl,sequent,tessi}!mntgfx!archiel