[Beowulf] MPI ABI

[Mark Hahn]

> There are only 2 ways to achieve ABI compatibility:
> 1) you impose/agree on a single one.

ignoring the politics for a moment, what are the technical sticking points?

for instance, I have the impression that the linux x86_64 ABI is reasonably
well-defined, and it seems to permit use of at least some libraries 
across different compilers in my experience.  so what are the problem areas?
just that the MPI Forum has chosen/failed to define constants and proper
opaque types? 

thanks, mark hahn.