[ET Trac] [Einstein Toolkit] #2188: running on wheeler fails with error messages from MPI

[Einstein Toolkit]

#2188: running on wheeler fails with error messages from MPI
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  Reporter:  Roland Haas  |      Owner:  Erik Schnetter
      Type:  defect       |     Status:  assigned
  Priority:  major        |  Milestone:  ET_2018_08
 Component:  SimFactory   |    Version:  development version
Resolution:               |   Keywords:
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Comment (by Roland Haas):

 Good question. I had a look just now. The log file shows that the mpirun
 used was `/home/eschnett/src/spack-view/bin/mpirun` and we set MPI_DIR to
 be /home/eschnett/src/spack-view however MPI_LIB_DIRS ends up being
 configured (by MPI's detect.pl script) as
 `/home/eschnett/src/spack/opt/spack/linux-
 rhel7-x86_64/gcc-7.3.0-spack/openmpi-3.0.1-6lcorydh3sxme5eu3pculmgzo2nefolv/lib`
 . We do not (other than on Crays) use mpicc but instead use the normal
 compiler and explicitly link against the MPI library. The `mpirun` in in
 `/home/eschnett/src/spack-view/bin/mpirun` is identical to the one in
 `/home/eschnett/src/spack/opt/spack/linux-
 rhel7-x86_64/gcc-7.3.0-spack/openmpi-3.0.1-6lcorydh3sxme5eu3pculmgzo2nefolv/bin`
 so it should be compatible.

 So, it does not seem to be quite so simple.

 If I had to bet money I would bet on the system infiniband library having
 changed and one has to recompile OpenMPI to account for this.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/2188#comment:2>
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