rootcint and inlines

From: Damir Buskulic (buskulic@lapp.in2p3.fr)
Date: Thu Sep 09 1999 - 17:54:57 MEST 

Hi,

I have a problem that I'm not able to handle alone. It goes down to this
very simple case. Consider the header file below that gives me trouble :
=====================================================================
#include "TNamed.h"

class VOptions : public TNamed
{
public :
   void              Copy(TObject& obj);
   ClassDef(VOptions,1)  // General options used in a VEGA session
};
=====================================================================

Simple (and simplified) indeed. When one tries to run rootcint on it, 

[toto]$ rootcint -f options.cc -c -I$ROOTSYS/include VOptions.h
LinkDef.h

The linkdef file is given below. Then, compile the produced file :

[toto]$ g++ -g -fPIC -fno-rtti -fno-exceptions -I$ROOTSYS/include -c
options.cc

And see the symbols defined with

[toto]$ nm -C options.o | grep VOptions
                 U VOptions::DeclFileLine(void)
                 U VOptions::DeclFileName(void)
(among other things).
So, the inline DeclFileLine is not defined. When I link the rest of my
program, I end up with complaints from the linker about undefined
references to `VOptions virtual table` and `VOption::DeclFileLine(void)`

Now the point is that if I remove the derivation from TNamed OR use a
method Copy() instead of Copy(TObject& obj);, there is no more warning
and everything goes OK, but it's not what I want.
There was an explanation some time ago about such inline problems. Is it
possible to make rootcint generate code that will force the compiler to
do the right thing (what ever that means)

By the way, I tried everything I could imagine (put constructors, move
normal inlines around, etc...). Is there a way out of this ? Force some
other part of the code to use this class ? Make a special ClassDef
without inlines ?

Sorry for this long message

Damir

==========================LinkDef.h
#ifdef __CINT__

#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;

#pragma link C++ class VOptions;

#endif
=====================================

-- 
=====================================================================
| Damir Buskulic                  | Universite de Savoie/LAPP       |
|                                 | Chemin de Bellevue, B.P. 110    |
| Tel : +33 (0)450091600          | F-74941 Annecy-le-Vieux Cedex   |
| e-mail: buskulic@lapp.in2p3.fr  | FRANCE                          |
=====================================================================
mailto:buskulic@lapp.in2p3.fr

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