If MPI parcelport is not available, running HPX under mpirun should fail

[brycelelbach]

Currently, if you try to run hpx using mpirun while the MPI parcelport is not built, the application hangs; it would be nice to get a clear error message.

[sithhell]

Am 08.11.2013 21:05 schrieb "Bryce Adelstein-Lelbach" notifications@github.com:

Currently, if you try to run hpx using mpirun while the MPI parcelport is
not built, the application hangs; it would be nice to get a clear error
message.

I disagree. You might want to use mpirun using a different parcelport. For
example, on stampede, you can only start jobs through ibrun which is a
wrapper for mpirun. If you only want the ibverbs parcelport this would give
an erroneous error.

[sithhell]

To further clarify, mpirun is just a tool to start distributed processes,
like srun or pbsdsh (the only difference to those other tools is that it
sets a few more environment variables). There is no reason why hpx should
throw an error here at any time.