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
#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]: 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 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler