[ET Trac] [Einstein Toolkit] #216: Thorns in ExternalLibraries should abort if the old "extras" mechanism has been selected

[Einstein Toolkit]

#216: Thorns in ExternalLibraries should abort if the old "extras" mechanism has
been selected
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  Reporter:  hinder       |       Owner:                   
      Type:  enhancement  |      Status:  new              
  Priority:  minor        |   Milestone:                   
 Component:  Cactus       |     Version:                   
Resolution:               |    Keywords:  ExternalLibraries
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Comment (by eschnett):

 The patch is fine. I vote to apply it.

 Technically, $HDF5 could expand to a string beginning with a minus sign,
 which would make the test command "[" fail because it will interpret this
 as option. The suggested solution is to test whether "x$HDF5" is equal to
 "x" instead of testing "$HDF5" directly. I don't think this is an issue in
 practice.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/216#comment:3>
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