[GHC] #5172: unix-compat does not build because of strangeness in GHC's header files.

[GHC]

#5172: unix-compat does not build because of strangeness in GHC's header files.
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  Reporter:  rtvd            |          Owner:                  
      Type:  bug             |         Status:  closed          
  Priority:  normal          |      Milestone:                  
 Component:  Runtime System  |        Version:  7.0.3           
Resolution:  worksforme      |       Keywords:  unix-compat     
  Testcase:                  |      Blockedby:                  
Difficulty:                  |             Os:  Unknown/Multiple
  Blocking:                  |   Architecture:  Unknown/Multiple
   Failure:  Other           |  
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Comment(by simonmar):

 I think `unix-compat` should not need to `#include "HsUnix.h"`, removing
 that would also fix the problem.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5172#comment:4>
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