[GHC] #7343: Potential build issues on some UNIX versions

[GHC]

#7343: Potential build issues on some UNIX versions
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 Reporter:  SimonHengel       |          Owner:                  
     Type:  bug               |         Status:  new             
 Priority:  normal            |      Component:  libraries/unix  
  Version:  7.6.1             |       Keywords:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
  Failure:  None/Unknown      |       Testcase:                  
Blockedby:                    |       Blocking:                  
  Related:                    |  
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 In {{{HsUnix.c}}} {{{unsetenv}}} is used even if {{{HAVE_UNSETENV}}} is
 not defined.  It's probably not a big deal as it has been like that for
 four years.

 But AFAIK, this would at least fail to build with relatively recent
 versions of HPUX.

 If we conclude that this check is not necessary, then I would remove them
 from {{{System.Posix.Env}}}, too.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7343>
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