Dougal Stanton wrote:
It seems that profiling and threading are not supported at the same time in GHC6.6. At least, it objects to using both the flags at the same time, and there's a Trac entry for that issue.
So I just wanted to be sure that I really need threading. I'm passing text through some filters written in perl, just ordinary command line programs. I do it like this:
do (hin, hout, herr, ph) <- runInteractiveProcess cmd args Nothing Nothing forkIO $ hPutStr hin content >> hClose hin out <- hGetContents hout return (ph, out)
which seems to require threading. If I compile without, it will hang indefinitely, I presume deadlocked. Is there a way this can be done without threading?
You certainly can use threading with profiling, just not the "threaded RTS" that you get with the -threaded option. There are certain restrictions that apply when you don't use -threaded, but ordinary forkIO works fine. http://www.haskell.org/ghc/docs/latest/html/users_guide/options-phases.html#... Cheers, Simon