[petsc-dev] Runtime errors for spooles on BlueGene/Q

[Stefano Zampini]

Hi all,

on BG/Q, I cannot use the current version of spooles when configuring petsc
with download-spooles=1.
Namely, I get runtime errors related on MPI buffers aliasing in
MPI_Allgather calls.
Aliasing is prohibited by the MPI standard as in Fortran standards.

Attached please find some modified spooles' files which work on BG/Q.
I only changed the files that use MPI_Allgather. I don't know if there are
other aliasings inside the code.
I tested them and now it works. No more runtime errors.

Could you patch the PETSc version of spooles with these new files?

-- 
Stefano
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