[GHC] #12479: build fail of commercialhaskell.com with stack build on mac os x sierra beta 4

[GHC]

#12479: build fail of commercialhaskell.com with stack build on mac os x sierra
beta 4
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        Reporter:  stephenb          |                Owner:
            Type:  bug               |               Status:  infoneeded
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  MacOS X           |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12198            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by mistydemeo):

 Okay, got it - I fetched the actual `ghc` invocation from `cabal` and
 added `-keep-tmp-files`. I've attached the output of `otool -l`, which
 contains the load commands, and the dylib itself.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12479#comment:7>
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