[Haskell-cafe] Cabal Compiler Flag Problem
ben.derrett at googlemail.com
Wed Mar 24 01:52:49 EDT 2010
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?
On Wed, Mar 24, 2010 at 1:30 AM, Ivan Miljenovic
<ivan.miljenovic at gmail.com>wrote:
> On 24 March 2010 16:26, Ben Derrett <ben.derrett at googlemail.com> wrote:
> > 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?
> > 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 at gmail.com
Department of Mathematics
MIT Class of 2012
bderrett at mit.edu
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