-parallel and error"failed to load interface for ..."

Hal Daume III hdaume@ISI.EDU
Mon, 4 Nov 2002 07:19:02 -0800 (PST)

Hi all.

Valery: You unfortunately cannot just use -parallel with the normal GHC 
compiler.  You need to download one which is actually meant to be used in 
parallel (namely GPH).  You can find information about it here:

GHC Folk: I think a better error message is in order here.  I think in the 
past two weeks three people have tripped over this and emailed this list.  
Perhaps just when -parallel is specified in a non GUM/GranSim-ified GHC, 
it barfs with "GHC not built for parallelism" in the same way that a GHC 
not built for interactivity will barf on --interactive.

 - Hal

On Mon, 4 Nov 2002, Khamenia, Valery wrote:

> Hi ghc world,
> why option -parallel leads to error while without this option everything was
> compiled OK?
> --------------------Custom Tool: ghc--------------------
> Command   : D:\pkg\ghc\ghc-5.04.1\bin\ghc.exe -parallel -package concurrent
> "Examples.hs" -o a.exe
> Directory : "C:\tmp\Haskell\try"
> Examples.hs:2:
>     failed to load interface for `Prelude':
> 	Could not find interface file for `Prelude'
> Examples.hs:5:
>     failed to load interface for `Parallel':
> 	Could not find interface file for `Parallel'
> ---------------------------------------------------------------------------
> regards,
> Valery A.Khamenya
> Bioinformatics Department
> BioVisioN AG, Hannover
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Hal Daume III

 "Computer science is no more about computers    | hdaume@isi.edu
  than astronomy is about telescopes." -Dijkstra | www.isi.edu/~hdaume