Apropos my previous request for help (below): I think I've managed to
diagnose it and fix it myself.
It looks like I had a previous version of ghc installed (using 'port install
ghc', which installed 6.10.x in /opt/local/bin/.
The Haskell Platform seems to install 7.0.3, in /usr/bin/.
Looks like cabal was invoking the older ghc due it being earlier in my PATH.
Fixed, and it installs ok now.
Thanks anyway,
Nikhil
On Thu, Sep 15, 2011 at 12:29 PM, Rishiyur Nikhil
I'm following the instructions on the CUFP "T5 Parallel Programming in Haskell" web page for preparing for the tutorial, where it asks that I should: 'cabal install monad-par'.
I'm doing this on a Mac, Snow Leopard 10.6.8, after installing Haskell Platform. I have Xcode 3.2.4 installed.
I get the following error; please let me know how I should fix it (can reply to me personally instead of the list, at 'nikhil at acm dot org'. Thanks.
Nikhil
$ cabal install monad-par Resolving dependencies... Configuring monad-par-0.1.0.1... Preprocessing library monad-par-0.1.0.1... Building monad-par-0.1.0.1... Control/Monad/Par/Internal.hs:4:15-71: unknown flag in {-# OPTIONS #-} pragma: -fno-warn-unused-do-bind cabal: Error: some packages failed to install: monad-par-0.1.0.1 failed during the building phase. The exception was: ExitFailure 1