From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID
	autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,8fec429719a29bf9
X-Google-Attributes: gid103376,public
From: "Kevin F. Quinn" <kevq@banana.demon.co.uk>
Subject: Re: Interface between ADA and C++
Date: 1996/05/23
Message-ID: <31A46A6E.4B2F@banana.demon.co.uk>#1/1
X-Deja-AN: 156313558
x-nntp-posting-host: cdc.demon.co.uk
references: <31A2C469.41C6@essiris2.atlas.de>
content-type: text/plain; charset=us-ascii
organization: Computing Devices 
mime-version: 1.0
newsgroups: comp.lang.ada
x-mailer: Mozilla 2.0 (Win16; I)
Date: 1996-05-23T00:00:00+00:00
List-Id: <comp.lang.ada>


Norbert Roeben wrote:

> I try to call an C++ function from Ada. The linker always searches for
> C - function, not for a C++ - function.

Your problem is that the C++ function name is mangled by the C++ compiler,
almost certainly.

> Does anybody has a solution for this ?

Try adding something along the lines of (un-tried)

extern "C" {
  void GlueCppHello ( char *String ) {
     CppHello(String);
  }
}

to your C++ source set - the 'extern "C" {}' construct ensures that the code
in between is treated as normal "C" code, and as such the function name
GlueCppHello isn't mangled.  Then call GlueCppHello from your Ada code.

>         Unresolved:
>         CppHello

BTW - the above is a direct result of the change in function name by the C++
compiler.  There are a number of good reasons for this, but this is not the
place to go into them.  If you have complete documentation on the C++ compiler,
it may well tell you how to determine the actual linker symbol generated, in
which case you can use this directly instead of using the 'extern "C" ' stuff.

Cheers,
Kev.