[Haskell-cafe] ghc package problem

[Daniel Fischer]

Am Freitag 16 April 2010 15:40:38 schrieb Phyx:
> For the first part
>
> $ cat foo.hs
> module Main (main) where
>
> import Language.Haskell.Exts
>
> main :: IO ()
> main = print $ readExtensions "BangPatterns"
>
> $ ghc --make foo.hs
>
> foo.hs:3:8:
>     Could not find module `Language.Haskell.Exts':
>       Use -v to see a list of the files searched for.
>
> So same error. This isn't just limited to HSE though, it can't find
> packages like random,time etc either. Keeps reinstalling them on every
> cabal install.

Borked compiler, then, it seems. Does it work when you pass -package flags 
on the command line instead of using --make?
It looks a bit as though neither cabal nor GHC can parse the output of ghc-
pkg.

>
> And the second part,
>
> Ghc-pkg check doesn't return anything, so I assume it thinks
> everything's fine.
>
> Full output of my ghc-pkg list is below, and as you can see in the user
> packages, it's reinstalling every and shadowing those packages
> everytime. I could just rebuild everything including the compiler and
> that should fix it, but it's kinda odd that it got in this state.
>
> $ ghc-pkg list
> C:/msys/1.0/local\lib\package.conf.d:
>     Cabal-1.9.0
>     Win32-2.2.0.1
>     array-0.3.0.0
>     base-4.2.0.0
>     bin-package-db-0.0.0.0
>     (binary-0.5.0.2)
>     bytestring-0.9.1.5
>     containers-0.3.0.0
>     directory-1.0.1.1
>     dph-base-0.4.0
>     (dph-par-0.4.0)
>     (dph-prim-interface-0.4.0)
>     (dph-prim-par-0.4.0)
>     (dph-prim-seq-0.4.0)
>     (dph-seq-0.4.0)
>     extensible-exceptions-0.1.1.1
>     ffi-1.0
>     filepath-1.1.0.4
>     ghc-6.13.20100320
>     ghc-prim-0.2.0.0
>     haskell98-1.0.1.1
>     hpc-0.5.0.5
>     integer-gmp-0.2.0.0
>     old-locale-1.0.0.2
>     old-time-1.0.0.4
>     pretty-1.0.1.1
>     process-1.0.1.2
>     random-1.0.0.2
>     rts-1.0
>     template-haskell-2.4.0.0
>     time-1.1.4
>
> C:\Users\Phyx\AppData\Roaming\ghc\i386-mingw32-6.13.20100320\package.con
>f.d: QuickCheck-2.1.0.3
>     WinDll-0.1.9
>     cpphs-1.11
>     ghc-paths-0.1.0.6
>     haskell-src-exts-1.9.0
>     haskell98-1.0.1.1
>     mtl-1.1.0.2
>     random-1.0.0.2
>     syb-0.1.0.3
>     tar-0.3.1.0
>     time-1.2.0.1
>