[ET Trac] [Einstein Toolkit] #980: Remove support for the flesh-based MPI mechanism

[Einstein Toolkit]

#980: Remove support for the flesh-based MPI mechanism
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 Reporter:  hinder       |       Owner:     
     Type:  enhancement  |      Status:  new
 Priority:  major        |   Milestone:     
Component:  Cactus       |     Version:     
 Keywords:               |  
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 The flesh-based MPI mechanism has just been deprecated in favour of
 ExternalLibraries/MPI.  Even though the latter is new, it is probably a
 good idea to completely disable the old mechanism since having any mixture
 of thorns/optionlists using the old and new mechanisms is completely
 untested and will likely lead to problems and confusion.  It's better to
 give a useful fatal error message if someone still specifies "MPI = " in
 their optionlist than to have things break in other weird and wonderful
 ways.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/980>
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