🔒 Locked

linker error : vtable

Started by JPulham Apr 6, 2006 at 4:44 AM 3 replies 550+ views

Original Post

Apr 6, 2006 at 4:44 AM

I'm writing a game engine with a base calss called 'FVideoDriver'. When I inherit from that with 'FOpenGLDriver' I get the error: [linker error] undefined reference to 'vtable for Namespace::class'. this happens whenever I try to use inheritance... so whats the problem? I'm using DevCpp with MinGW. (if you need more code tell me)

Emmanuel Deloget

431

Emmanuel Deloget

Apr 6, 2006 at 5:47 AM

AFAIK, this error is generated when you forgto to properly define a declared virtual function.

Regards,

Bregma

1,022

Bregma

Apr 6, 2006 at 7:33 AM

GCC (the compiler used by MinGW) will emit the vtable (virtual function lookup table) into the object file corresponding to the translation unit containing the destructor of the object (got that?).

Try declaring a virtual non-inline destructor in your base class and make sure it's defined in a separate source file that gets included in your app. It can be pure virtual, as long as it's defined somewhere non-inline.

JPulham

Author

JPulham

Apr 6, 2006 at 9:08 AM

Thanks...I fixed it but couldn't understand how :P

Zahlman

257

Topic Locked