[ET Trac] [Einstein Toolkit] #1667: ExternalLibraries/MPI should report error messages

[Einstein Toolkit]

#1667: ExternalLibraries/MPI should report error messages
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  Reporter:  hinder  |       Owner:                     
      Type:  defect  |      Status:  new                
  Priority:  minor   |   Milestone:                     
 Component:  Cactus  |     Version:  development version
Resolution:          |    Keywords:  MPI                
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Comment (by hinder):

 Bruno: I just ran into this on Hydra, which is similar to supermuc, and
 setting MPI_DIR to some directory solves the problem. It is never used, so
 you can set it to anything.

 Erik: NO_BUILD means "don't use a preinstalled version".  I would say this
 is misnamed.  There might not be a single directory which corresponds to
 the MPI installation directory, and both MPI_LIB_DIRS and MPI_INC_DIRS
 need to be set.  In that case, there is no meaningful content to put in
 MPI_DIR, as it will never be used.  You seem to be defending the current
 system and suggesting that people should not have found it confusing.  I
 find it very confusing.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1667#comment:10>
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