Dirk,
Glasgow parallel Haskell (GpH) doesn't work with GHC 4.04,
but will real soon: (in 4.06 I believe). More info on GpH,
including the mailing list can be found on
http://www.cee.hw.ac.uk/~dsg/gph/
Phil
> -----Original Message-----
> From: Dirk Nowotka TUCS [mailto:[EMAIL PROTECTED]]
> Sent: None
> To: [EMAIL PROTECTED]
> Subject: ghc -parallel ...
>
>
> Hi,
>
> I've been trying to compile a toy example with GHC's parallel option.
>
> The `impossible' happened ...
>
> How do I get the parallel machinery working?
>
> Best,
> Dirk
>
>
> Here is the verbose compiler report:
> (the program code follows after that)
>
> droog:~/Hacks/haskell/Equations/src/test> ghc -parallel
> -i/softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4.04/imports/concurrent
> :/softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4.04/imports/std -v
> parFact.hs
> The Glorious Glasgow Haskell Compilation System, version 4.04, patchlevel 1
>
> Effective command line: -parallel
> -i/softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4.04/imports/concurrent
> :/softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4.04/imports/std -v
> ghc: unrecognised option: -fstack-check
>
> Ineffective C pre-processor:
> echo '{-# LINE 1 "parFact.hs" -}' > /tmp/ghc21755.cpp && cat
> parFact.hs >> /tmp/ghc21755.cpp
>
> real 0.0
> user 0.0
> sys 0.0
> ghc:compile:Output file parFact.o doesn't exist
> ghc:compile:Interface file parFact.hi doesn't exist
> ghc:recompile:Input file parFact.hs newer than parFact.o
>
> Haskell compiler:
> /softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4.04/hsc
> /tmp/ghc21755.cpp -fparallel -fignore-interface-pragmas
> -fomit-interface-pragmas -fsimplify [ -finline-phase2
> -fmax-simplifier-iterations4 ] -fwarn-overlapping-patterns
> -fwarn-missing-methods -fwarn-duplicate-exports -fhi-version=404 -static
> -himap=/softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4.04/imports/concu
> rrent%.hi:/softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4.04/imports/st
> d%.hi:.%.hi:/softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4.04/imports/
> concurrent%.mp_hi:/softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4.04/im
> ports/concurrent%.mp_hi:/softa/zeus/prg/fptools/lib/sparc-sun-solaris2/ghc-4
> .04/imports/std%.mp_hi -v -hifile=/tmp/ghc21755.hi -C=/tmp/ghc21755.hc
> -F=/tmp/ghc21755_stb.c -FH=/tmp/ghc21755_stb.h +RTS -H6000000 -K1000000
> Glasgow Haskell Compiler, version 4.04, for Haskell 98, compiled by GHC
> version 4.04
>
> panic! (the `impossible' happened):
> closureCodeBody:arg_regs
>
> Please report it as a compiler bug to [EMAIL PROTECTED]
>
>
>
> real 2.5
> user 2.3
> sys 0.1
> deleting... /tmp/ghc21755.cpp /tmp/ghc21755.hi /tmp/ghc21755.hc
> /tmp/ghc21755_stb.c /tmp/ghc21755_stb.h
>
> rm -f /tmp/ghc21755*
>
>
>
>
> parFact.hs:
>
> module Main(main) where
>
> import IO
> import Parallel
>
> pfc :: Int -> Int -> Int -> Int
> pfc x y c
> | y - x > c = f1 `par` (f2 `seq` (f1+f2))
> | x == y = x
> | otherwise = pf x m + pf (m+1) y
> where
> m = (x+y) `div` 2
> f1 = pfc x m c
> f2 = pfc (m+1) y c
>
> pf :: Int -> Int -> Int
> pf x y
> | x < y = pf x m + pf (m+1) y
> | otherwise = x
> where
> m = (x+y) `div` 2
>
> parfact x c = pfc 1 x c
>
> mk_num :: String -> Int
> mk_num s = (fst . head) (reads s :: [(Int,String)])
>
> main = do putStr "argument 1: "
> arg1 <- getLine
> putStr "argument 2: "
> arg2 <- getLine
> putStrLn (show (parfact (mk_num arg1) (mk_num arg2)))
>
--------------------------------------------------
Phil Trinder
Department of Computing and Electrical Engineering
Heriot Watt University
Riccarton
Edinburgh, EH14 4AS
E-mail: [EMAIL PROTECTED]
Teleph: +44 (0)131 451 3435
Depart: +44 (0)131 451 3328
Fasmly: +44 (0)131 451 3327
Intrnt: www:http://www.cee.hw.ac.uk/~trinder
