Re: Abstract base class problems with CINT

Rene Brun (Rene.Brun@cern.ch)
Thu, 08 Jul 1999 16:29:42 +0000


Hi Gene,
This should work correctly and we have many such examples in Root
itself.
My guess is that you are missing the implementation of a member function
in the derived class.
Could you package your two headers with a dummy implementation
into one file and sent it to me?

Rene Brun

Gene Van Buren wrote:
>
> Hi, I have an abstract base class and an associated
> derived class which I'd like to use in ROOT CINT. I have
> no compile-time errors/warnings. However, I cannot
> load the shared library into ROOT because the __vtbl
> for the abstract base class is undefined. When I look
> in the shared library with nm, I see that not only is
> the __vtbl undefined, but so are the Class, Dictionary,
> ImplFileLine, and ImplFileName member functions.
>
> Both the base and derived classes have the ClassDef
> statements (with input number=0), and the derived
> class implementation file has its ClassImp.
>
> If anyone has suggestions for something I can look at
> or I've left out, please let me know. Thanks,
>
> -Gene Van Buren
> gene@bnl.gov