[GHC] #2979: better support for FFI C wrappers for macros in system headers

[GHC]

#2979: better support for FFI C wrappers for macros in system headers
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    Reporter:  duncan            |        Owner:                  
        Type:  feature request   |       Status:  new             
    Priority:  normal            |    Milestone:  6.12.1          
   Component:  Compiler          |      Version:  6.10.1          
    Severity:  normal            |   Resolution:                  
    Keywords:                    |   Difficulty:  Unknown         
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Changes (by iquiw):

 * cc: iku.iwasa at gmail.com (added)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2979#comment:4>
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