#7651: Buiding GHC with parallel IO manager freezes on Mac (not on FreeBSD) ---------------------------------+------------------------------------------ Reporter: kazu-yamamoto | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Build System | Version: 7.7 Keywords: | Os: MacOS X Architecture: Unknown/Multiple | Failure: Building GHC failed Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Comment(by kazu-yamamoto): Andreas wrote C programs to simulate the parallel IO manager: https://github.com/AndreasVoellmy/epollbug kqueueserver2 uses kevent64() while kqueueserver3 uses kevent(). kqueue2 disclosed that kevent64() is unstable. The details are described in: https://discussions.apple.com/thread/4783301 We stopped using kevent64() and started using kevent() in the parallel IO manager. But building GHC still freezes. So, workaround is still necessary on Mac. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7651#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler