Re: Why the class is declared as undefined

Nick van Eijndhoven (Nick@phys.uu.nl)
Mon, 08 Feb 1999 15:17:06 +0100

Wei Xie wrote:
>
> Dear Rooters,
>
> Sometimes I met following problems:
>
> The shared library has been successfully built without any problem.
> When load it into ROOT and type '.class', ROOT says the class is
> not defined but the class is actually define in the code.
>
> There is no any information to help to find what's going wrong in this
> case. Could you remind me what could be the possible reason ?
>
> Sincerely yours
> Xie

Hi Xie,
This happened to me as well and the solution was very simple.
In case you create let's say 2 shared libraries (lib1.sl and lib2.sl)
but if you used in both cases the same name for the rootcint
generated dictionary, you get exactly the problem you mention.
Simple solution :
If one creates e.g. a library lib1.sl, one should make it a rule
to call the rootcint generated dict lib1dict.cxx and lib1dict.h.
In this case every library you will create will have a unique
dictionary name and the problems are solved. 

-- 


                                              Cheers,
                                               Nick.


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