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Commit 3db30913 authored by Aron Helser's avatar Aron Helser
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Add mpi large-message support from mpich 4.x to vtkMPICommunicator

Variants of mpi calls allow for message lengths > MAX_INT in
mpi 4.x and later. Checks the MPI_VERSION to enable. Makes
64bit versions of methods available and checks for overflow if
large messages aren't available.
parent 53e6ce92
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