[Beowulf] MPI ABI

[Greg Lindahl]

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

MPI types
values of constants

Fortran name-mangling
Fortran LOGICAL

program startup (optional)

> for instance, I have the impression that the linux x86_64 ABI is reasonably
> well-defined,

It mostly works. We have run MPICH-1 based commercial codes by playing
shared library tricks.

-- greg
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