TITLE: Linker reports undefined __vtbl


PROBLEM: ???

<Someone was having trouble with the linker complaining of an undefined
symbol __vtbl>


RESPONSE: rmartin@thor.Rational.COM (Bob Martin)

I think cfront generates the _vtbl_ in the module which contains the
implementation of the first virtual function declared in the class.
If the first virtual function in the class is pure, then no vtbl gets
generated.... 


RESPONSE: ark@alice.att.com (Andrew Koenig), 15 Jan 92
	  AT&T Bell Laboratories

You're close.

Cfront generates the vtbl in the module that contains the implementation
of the first virtual function that is neither pure nor inline.  If you
forget to define that function, the linker will often report that
the vtbl is the problem.