[GHC] #8528: Preprocessor issues building GHC HEAD on Mavericks

[GHC]

#8528: Preprocessor issues building GHC HEAD on Mavericks
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        Reporter:  guest                |            Owner:
            Type:  bug                  |           Status:  new
        Priority:  high                 |        Milestone:
       Component:  Compiler             |          Version:  7.7
      Resolution:                       |         Keywords:  clang
Operating System:  MacOS X              |     Architecture:  x86_64 (amd64)
 Type of failure:  Building GHC failed  |       Difficulty:  Unknown
       Test Case:                       |       Blocked By:
        Blocking:                       |  Related Tickets:  #8480
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Comment (by simonmar):

 Yes I understand that clang's cpp doesn't support the same syntax as `cpp
 -traditional`.  What I don't understand is what broke in Alex and how to
 fix it.  I didn't write any indented cpp directives, and there were no
 changes to `GenericTemplate.hs` between 3.1.0 and 3.1.2.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8528#comment:9>
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