Path: utzoo!attcan!uunet!ncrlnk!ncrcae!hubcap!gatech!bloom-beacon!mit-eddie!apollo!vasta
From: vasta@apollo.COM (John Vasta)
Newsgroups: comp.sys.apollo
Subject: Re: C++ vs Apollo Sys Files ? (Long) Compatability ?
Keywords: c++ apollo system compatability
Message-ID: <4200289e.1ad5a@apollo.COM>
Date: 13 Mar 89 15:37:00 GMT
References: <1093@cheops.eecs.unsw.oz>
Reply-To: vasta@apollo.COM (John Vasta)
Organization: Apollo Computer, Chelmsford, MA
Lines: 25

I'm responsible for Apollo's C++ product. Yes, C++ is lagging behind
C in the implementation of language extensions such as __attribute()
and #options. The __attribute() syntax didn't exist when C++ was released;
the next version will support it. In the meantime, you can define macros
so that __attribute is preprocessed out:

    #define NO_ATTRIBUTE
    #define __attribute(a) NO_ATTRIBUTE

(The two macros are required to get around a bug in the macro preprocessor;
just defining __attribute(a) with a null expansion won't work.) Put these
macros in your source file, before including any header files.

The #options syntax was added to some header files after C++ was released,
also. Again, the next version will support it. This syntax cannot be
easily defined away, you'll have to edit the header files. I suggest putting

    #ifdef c_plusplus
     ...
    #endif

around it for now.

John Vasta  (vasta@apollo.com)
Apollo Computer, Inc.