Thank you. I'm using GHC 6.8.2. I can't see ghc-options in the file /root/.cabal/config, am I looking in the right place? Ben On Wed, Mar 24, 2010 at 1:30 AM, Ivan Miljenovic wrote:

On 24 March 2010 16:26, Ben Derrett wrote:

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cabal install cgi Resolving dependencies... Configuring MonadCatchIO-mtl-0.3.0.0... Preprocessing library MonadCatchIO-mtl-0.3.0.0... Building MonadCatchIO-mtl-0.3.0.0... [1 of 1] Compiling Control.Monad.CatchIO ( Control/Monad/CatchIO.hs, dist/build/Control/Monad/CatchIO.o ) Control/Monad/CatchIO.hs:146:34: Illegal signature in pattern: E.SomeException

Interesting.... the code is obviously using extensible-exceptions but it doesn't seem to work. What version of GHC are you using?

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Use -XPatternSignatures to permit it cabal: Error: some packages failed to install: MonadCatchIO-mtl-0.3.0.0 failed during the building phase. The exception was: exit: ExitFailure 1 cgi-3001.1.8 depends on MonadCatchIO-mtl-0.3.0.0 which failed to install. So, I modified my /root/.cabal/config with: -- flags: -XPatternSignatures

Nah, that's a GHC flag not a Cabal/cabal-install flag, so you'd have to edit the .cabal file to add that in (where it says ghc-options).

-- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com

-- Ben Derrett Department of Mathematics MIT Class of 2012 bderrett@mit.edu