[Hackage] #231: "buildable: False" should fail the current configuration

[Hackage]

#231: "buildable: False" should fail the current configuration
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  Reporter:  duncan         |        Owner:  nominolo 
      Type:  defect         |       Status:  new      
  Priority:  normal         |    Milestone:  Cabal-1.6
 Component:  Cabal library  |      Version:  1.2.3.0  
  Severity:  normal         |   Resolution:           
  Keywords:                 |   Difficulty:  normal   
Ghcversion:  6.8.2          |     Platform:           
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Comment (by duncan):

 Another possibility is to deprecate buildable for this use case and add
 `fail` instead which would provide an error message to indicate why a
 particular configuration is not possible.

 The semantics would be slightly different to `buildable: False`. It would
 make configuring the whole package fail, not just disable building that
 executable or library.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/231#comment:3>
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