[ET Trac] [Einstein Toolkit] #1897: MPI thorn builds when it shouldn't

[Einstein Toolkit]

#1897: MPI thorn builds when it shouldn't
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  Reporter:  hinder                 |       Owner:                     
      Type:  defect                 |      Status:  review             
  Priority:  blocker                |   Milestone:  ET_2016_05         
 Component:  EinsteinToolkit thorn  |     Version:  development version
Resolution:                         |    Keywords:  MPI                
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Comment (by knarf):

 'done':
 - tells Cactus
   - That that thorn is 'ready'.
   - The last update time of the status of that thorn (file date). This is
 used to decide whether
     dependencies need to be rebuilt.
 - created by detect.sh if nothing needs to be built (detected installed
 library)
   Otherwise not touched there.
 - created and/or modified (touched) always after build

 'available':
 - not used by Cactus
 - tells the make system whether build.sh needs to run, i.e., whether after
 detection a build is
   necessary.
 - is created and/or updated whenever detection is run and something was
 detected.
   The update is necessary to make it newer than the file time of
 'build.sh', which is what 'make' uses as
   comparison. The comparison is done so that a re-build is triggered if
 build.sh is changed (and
   detection doesn't find anything).

 What is left is the (currently also buggy I think) case of a vanishing
 system library. In that case, 'done' would need to be removed by 'detect'
 (but isn't I think at the moment), and 'available' probably also should be
 removed in that case.

-- 
Ticket URL: <https://trac.einsteintoolkit.org/ticket/1897#comment:7>
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