[ECOS] _impure_ptr ??

Bob Koninckx bob.koninckx@mech.kuleuven.ac.be
Mon Mar 24 21:37:00 GMT 2003


It's a c++ thing, so I suppose it will be there for any platform

Bob

On Mon, 2003-03-24 at 22:31, Gary D. Thomas wrote:
> On Mon, 2003-03-24 at 14:26, Bart Veer wrote:
> > >>>>> "Bob" == Bob Koninckx <bob.koninckx@mech.kuleuven.ac.be> writes:
> > 
> >     Bob> This redefinition of __xca_pure_virtual seems to solve the
> >     Bob> problem. No more link errors, application runs fins.
> >     Bob> Apparently, the compiler pulls this function in as soon as
> >     Bob> you have at least one pure virtual function in your
> >     Bob> application.
> > 
> > I have now reproduced this. Using a pure virtual function used to pull
> > in a function __pure_virtual_called() or something like that, which
> > was provided by libgcc.a and just aborted the application. That could
> > happen if somehow you managed to call a virtual function while the
> > base object was still being constructed, before the derived class
> > constructor had updated the virtual function table. Nowadays it
> > pulls in a more complicated __cxa_pure_virtual() from
> > libstdc++-v3/libsup++/pure.cc which has additional library
> > dependencies, unwanted ones in an eCos setup.
> > 
> > I think we want to put our own dummy __cxa_pure_virtual() into
> > CYGPKG_HAL or CYGPKG_INFRA. Jifl, any preferences ?
> 
> If this is PowerPC only, then it goes in the HAL.
> If it is common to all versions of GCC, then I would think INFRA.
-- 
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ir. Bob Koninckx
Katholieke Universiteit Leuven
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