AW: [Haskell-cafe] Building MissingH on Windows - now problems with hslogger

27 Nov 2007

      Ok, it looked good, but then I had to install first the hslogger. Here I
found the same problem, but I had now the scheme, so I began to change.

This it worked fine for configure, but when I try to build, I get:

[6 of 6] Compiling System.Log.Logger ( src/System/Log/Logger.hs,
dist\build/System/Log/Logger.o )

src/System/Log/Logger.hs:348:22:
    Illegal signature in pattern: String
        Use -XPatternSignatures to permit it

I was thinking that by adding PatternSignatures to the extensions would do
the job, but then I get:

Setup.hs: hslogger.cabal:28: Parse of field 'extensions' failed

Now it looks that we have in the data type Extension from the module
Distribution.Extension no data constructor for this kind of extension
(PatternSignatures). The only thing with patterns is PatternGuards.

I tried also to reformulate a little bit that offending line 348 - there is
something like:

case Map.lookup x lt of
   Left (_::String) -> ...

But beeing very late, I gave up after a few tries...

Nicu
...
-----Ursprüngliche Nachricht-----
Von: haskell-cafe-bounces@haskell.org 
[mailto:haskell-cafe-bounces@haskell.org] Im Auftrag von 
Thomas Schilling
Gesendet: Montag, 26. November 2007 21:42
An: haskell-cafe@haskell.org
Betreff: Re: [Haskell-cafe] Building MissingH on Windows
On Mon, 2007-11-26 at 21:24 +0100, nionita@lycos.de wrote:
...
Hi,
I'm trying to build MissingH (0.18.6) on Windows, but it looks like 
(probably because of changes in Cabal) the Setup.hs is broken. Im 
using GHC 6.8.1. Following message:
$ runhaskell Setup.hs configure
Setup.hs:19:35:
    Couldn't match expected type `(Either
                                     GenericPackageDescription 
PackageDescription,
                                   HookedBuildInfo)'
           against inferred type `PackageDescription'
    In the first argument of `(confHook defaultUserHooks)', namely
        `mydescrip'
    In the expression:
        let
          mydescrip = case os of
                        "mingw32" -> ...
                        _ -> ...
        in (confHook defaultUserHooks) mydescrip flags
    In the definition of `customConfHook':
        customConfHook descrip flags
                         = let mydescrip = ...
                           in (confHook defaultUserHooks) mydescrip 
flags
I'm new to Cabal and I couldn't see a fast way to fix it.
Thanks,
Nicu
Try replacing the original files with the attached files.