Hello

Having read the papers on Nested Data Parallelism in the Haskell I wanted to play around with the de-sugared implementation in the GHC library NDP. I have built GHC from source, on RHE5, and then installed the NDP library from the tar ball. Following the build instructions in the README I got to building the library which resulted in the following error being reported:

ghc-6-6.1: combination not supported: Threaded/Profiling

This seems to be down to the fact that -prof and -threaded have been specified on a particular build line, although I emit not to be completely sure about this.

Looking through the GHC page on its SMP support it seems to imply that the option -threaded is not needed when building code, rather when linking a parallel program, but it is unclear if this is the case when building a library such as NDP.

Having scanned through the GHC source tree it seems that -prof is referenced in numerous places such that it would be a bit of a pain to have to remove these over removing the single reference to -threaded in the ndp.mk file.

Thanks for any help that you can provide on this.

Many Regards,

Ben

Benedict R. Gaster
S/W Architecture Team Lead
ClearSpeed Technology Plc
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