[Swig-user] ImportError: undefined symbol...what could this mean?

[FermiPhysics <ant...@ya...>]

I am trying to wrap a C++ class for Python.  The platform is scientific
Linux.

The class I want my Python code to have access to is called feb. It inherits
from a class called Frames.  Here is the code for my feb.i file:

%module feb
%{
#include "feb.h"
#include "Frames.h"
#include "trips.h"
#include "FrameTypes.h"
%}

class Frames {
public:
   Frames();
   virtual ~Frames();
   unsigned char *message;
   void MakeDeviceFrameTransmit(Devices, Broadcasts, Directions, unsigned
int, unsigned int);
   virtual void MakeMessage();
   bool CheckForErrors();
   inline unsigned char *GetOutgoingMessage();
   void DeleteOutgoingMessage();
 };
 
 class feb : public Frames {
    feb(int, bool, febAddresses, int reg);
    ~feb();    
    febAddresses inline GetBoardNumber();
    int inline GetFWB();
    int inline GetMaxHits();
    bool inline GetInit();
    inline unsigned char *GetBuffer(); 
    void inline SetMaxHits(int a);
    void inline SetInitialized(bool a);
    void SetFEBDefaultValues();
    void ShowValues();
    void MakeMessage();
    void DecodeMessage(int);
    inline trips *GetTrip(int i);
    int inline WriteMessageLength();
    unsigned char inline GetTripPowerOff();
    unsigned short inline GetHVActual();
    unsigned short inline GetHVTarget();
    unsigned short inline GetHVPeriodAuto();
};

I include both the feb and Frames class declarations here.  I used the
following commands to generate the code:

swig -c++ -python -o feb_wrap.cpp feb.i
g++ -fPIC feb.cpp
g++ -fPIC feb_wrap.cpp -I/home/users/chris/include/python2.6
g++ -shared feb.o feb_wrap.o -o _feb.so

This worked fine, and I got a module _feb.so.  Running swig also produced a
module feb.py to import.  When I ran python and tried to import it I got
this error

>>> import feb
Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
    File "feb.py", line 28, in <module>
        _feb = swig_import_helper()
    File "feb.py", line 25, in swig_import_helper
        import _feb
ImportError: ./_feb.so: undefined symbol: _ZTV6Frames

I think this could have to do with my inheritance situation, since the
symbol probably comes from the Frames class.  Where is my mistake?

Thanks in advance,
Chris
-- 
View this message in context: http://www.nabble.com/ImportError%3A-undefined-symbol...what-could-this-mean--tp24739582p24739582.html
Sent from the swig-user mailing list archive at Nabble.com.