[Mpi-22] MPI-2.2 -- change ABI or not?

[Erez Haba]

C++ is a bit tricky. It will have a runtime load impact if the MPI provider exports the C++ interface from a DLL (because of the C++ func signature change). If the C++ interface was provided as a static library (or as an inline implementation in the header) that links to the C bindings, there is no runtime impact and the application does not need to rebuild.

Thanks,
.Erez

-----Original Message-----
From: mpi-22-bounces_at_[hidden] [mailto:mpi-22-bounces_at_[hidden]] On Behalf Of Jeff Squyres
Sent: Saturday, April 04, 2009 9:21 AM
To: MPI 2.2
Subject: [Mpi-22] MPI-2.2 -- change ABI or not?

On Apr 4, 2009, at 9:53 AM, Jeff Squyres (jsquyres) wrote:

> But the general point may need broad discussion next week -- have we
> been sure to adhere to the "must be ABI compatible" rule for all
> MPI-2.2 issues?
>
(changed the subjet to be more accurate)
        

I notice that ticket #5 has already had a 1st reading; it will  
certainly change the ABI.

My point: if we are taking a hard line to make it possible for any  
existing MPI-2.1 application to be able to run against MPI-2.1 and  
MPI-2.2 versions of the same implementation, we will need to review  
all MPI-2.2 tickets.


-- 
Jeff Squyres
Cisco Systems
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