RTTI portability

[Martin von Loewis]

> > itself - that one is in libcxa.so. Since the compiler will also need
> > to use the ABI routines for processing typeinfo objects from
> > libcxa.so, there will be no problem.
> 
> Ummm...  There are no ABI routines currently specified.

I was thinking of __dynamic_cast. It's only a single routine, but it
is part of the ABI, right? 

Likewise, the typeinfo pointers stuffed into struct
__cxa_throw_type_info are processed by libcxa.so routines only.

Regards,
Martin