[GHC] #3681: hsc2hs wrapper script throws away $HSC2HS_EXTRA's value when specified C compiler to use

[GHC]

#3681: hsc2hs wrapper script throws away $HSC2HS_EXTRA's value when specified C
compiler to use
------------------------+---------------------------------------------------
    Reporter:  nwn      |        Owner:            
        Type:  bug      |       Status:  new       
    Priority:  normal   |    Milestone:  6.14.1    
   Component:  hsc2hs   |      Version:  6.12.1 RC1
    Keywords:           |   Difficulty:            
          Os:  MacOS X  |     Testcase:            
Architecture:  x86      |      Failure:  Other     
------------------------+---------------------------------------------------

Comment(by igloo):

 The above kludge patch is in 6.12.1.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3681#comment:9>
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