Florian Weimer <fw@xxxxxxxxxxxxx> writes:
> On some large application (not written by me), GCC 4.0 does not emit
> some vtables, and link errors are the result.
>
> If I understand things correctly, a certain member is deemed the
> controlling member, and the vtable is emitted in the translation unit
> which contains this member.
>
> Is there a way to cause GCC to print this member? I think this would
> help me to debug this issue. (It's probably a bug in the application,
> but I'm not completely sure.)
>From the documentation:
C++ virtual functions are implemented in most compilers using a lookup
table, known as a vtable. The vtable contains pointers to the virtual
functions provided by a class, and each object of the class contains a
pointer to its vtable (or vtables, in some multiple-inheritance
situations). If the class declares any non-inline, non-pure virtual
functions, the first one is chosen as the ``key method'' for the class,
and the vtable is only emitted in the translation unit where the key
method is defined.
I don't know of any way to print the member.
Ian
