[GHC] #7602: Threaded RTS performing badly on recent OS X (10.8?)

[GHC]

#7602: Threaded RTS performing badly on recent OS X (10.8?)
-------------------------------+--------------------------------------------
    Reporter:  simonmar        |       Owner:  thoughtpolice
        Type:  bug             |      Status:  new          
    Priority:  normal          |   Milestone:  _|_          
   Component:  Runtime System  |     Version:  7.7          
    Keywords:                  |          Os:  MacOS X      
Architecture:  x86_64 (amd64)  |     Failure:  None/Unknown 
  Difficulty:  Unknown         |    Testcase:               
   Blockedby:  7678            |    Blocking:               
     Related:                  |  
-------------------------------+--------------------------------------------

Comment(by chak):

 Replying to [comment:19 thoughtpolice]:
 > Sigh. I haven't seen XCode 5. The fact they EOL'd gcc finally isn't
 totally surprising.
 >
 > The summary is that I have a patch for this and it should help the
 performance loss quite a bit, but the blocker here is #7678 - clang's
 preprocessor doesn't like the way we use RULES, among other things.
 >
 > This is work-around-able, but probably not in a very nice way
 unfortunately.

 Our use of CPP was always a dirty hack and it was only a matter of time,
 before it was going to bite us. Can't we just disable cpp in modules with
 rules?

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7602#comment:20>
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