[GHC] #5019: OS X: ld: warning: could not create compact unwind for _ffi_call_unix64

[GHC]

#5019: OS X: ld: warning: could not create compact unwind for _ffi_call_unix64
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    Reporter:  altaic          |        Owner:  igloo                            
        Type:  bug             |       Status:  new                              
    Priority:  high            |    Milestone:  7.2.1                            
   Component:  Compiler        |      Version:  7.1                              
    Keywords:                  |     Testcase:                                   
   Blockedby:                  |   Difficulty:                                   
          Os:  MacOS X         |     Blocking:                                   
Architecture:  x86_64 (amd64)  |      Failure:  Incorrect warning at compile-time
-------------------------------+--------------------------------------------

Comment(by chak):

 This warning turns into a fatal error with Xcode 4.2, see #5293

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5019#comment:15>
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