[ECOS] _impure_ptr ??

Thomas Koeller thomas@koeller.dyndns.org
Mon Mar 24 21:42:00 GMT 2003

I once proposed this, it has been rejected.
See http://sources.redhat.com/ml/ecos-patches/2002-06/msg00013.html
and related postings.


On Montag, 24. März 2003 22:25, 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 ?
> Bart
> --
> Bart Veer                       eCos Configuration Architect
> http://www.ecoscentric.com/     The eCos and RedBoot experts


Thomas Koeller, Software Development

Basler Vision Technologies
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