[cxx-abi-dev] vtables by different compilers

[Mark Mitchell]

--On Friday, July 26, 2002 04:33:00 PM -0700 Jessica Han 
<jessica at cup.hp.com> wrote:

>
> I am working on the interoperability issues on IA64 HPUX between g++ and
> aCC.
> I noticed that g++ put vtables into different sections with names like
> gnu.linkonce.d.VTABLENAME, but aCC puts all the vtables into .data
> sections.

Yes; this is because the GNU linker does not support COMDAT.

We don't *think* this should could problems -- but we don't know that for
sure.

The two ways to make the compilers match are to a) have GCC emit things
in COMDAT, or b) have aCC generate them in the linkonce sections, and
then add support for that to the HP linker.

But, if we can avoid that, it would be better.  If the aCC symbols are
weak, I would think things would work OK.

--
Mark Mitchell                   mark at codesourcery.com
CodeSourcery, LLC               http://www.codesourcery.com