[bug #38092] Optionally support distributed memory machines using MPI

[Bernhard Voelker]

Follow-up Comment #5, bug #38092 (project findutils):

I don't know much about mpirun, but if

  mpirun -n 1 xargs --args-file files -P 12 -n 5 ...

doesn't work because xargs wouldn't split the files,
what about the other way round?

  xargs --arg-file files -P 12 -n 5 mpirun ...

By this, xargs splits the input files into chunks of 5,
and mpirun can run the worker program on the nodes
it likes to.

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