Commit ebf3787a authored by kazu-yamamoto's avatar kazu-yamamoto Committed by tibbe

Adding a comment about the workaround of the parallel IO manager on Mac.

parent 5186ffc5
......@@ -316,6 +316,15 @@ registerFd mgr cb fd evs = do
return r
{-# INLINE registerFd #-}
{-
Building GHC with parallel IO manager on Mac freezes when
compiling the dph libraries in the phase 2. As workaround, we
don't use oneshot and we wake up an IO manager on Mac every time
when we register an event.
For more information, please read:
http://hackage.haskell.org/trac/ghc/ticket/7651
-}
-- | Wake up the event manager.
wakeManager :: EventManager -> IO ()
#if defined(darwin_HOST_OS)
......
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