Re: Interface between ADA and C++

["Kevin F. Quinn" <kevq@banana.demon.co.uk>]

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.