[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 nkpart):

 Aha! I have a fix. Although I'm still pretty confused about where the bug
 really is.

 Initially, I installed the latest versions of alex (3.1.2) and happy
 (1.19.1) available on hackage. These were updated in the last couple of
 days.

 Rolling back alex to 3.1.0 seems to resolve it.

 I the clean rebuild process I used was:

 {{{
     # Change the alex link
     git clean -fdx
     perl boot
     ./configure
     make
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8528#comment:4>
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