[ANNOUNCE] Shaking up GHC

[George Colpitts]

with ghc 8.0.0.20160111, cabal install shake fails with

[43 of 47] Compiling Development.Shake.Args (
src/Development/Shake/Args.hs, dist/build/Development/Shake/Args.o )

src/Development/Shake/Args.hs:1:1: error:
    solveWanteds: too many iterations (limit = 4)
      Unsolved: WC {wc_simple =
                      [D] _ :: Eq a (CDictCan)
                      [D] _ :: Ord a (CDictCan)
                      [D] _ :: Read a (CDictCan)
                      [D] _ :: Show a (CDictCan)
                      [W] hole{a4gTO} :: a ~ a (CNonCanonical)
                      [D] _ :: Eq a (CDictCan)}
      New superclasses found
      Set limit with -fconstraint-solver-iterations=n; n=0 for no limit

Is this a known problem?

Thanks


On Sat, Jan 23, 2016 at 9:05 AM, Andrey Mokhov <
andrey.mokhov at newcastle.ac.uk> wrote:

> Thanks David!
>
>
>
> > Are there any plans as to how to include it in the GHC tree? Does it
>
> > ship with all the libraries required to build the build system, will we
>
> > have a mini-build system to bootstrap it? If I recall correctly, we rely
>
> > on Cabal sandboxes on Linux/OSX and global Cabal library
>
> > installations on Windows in order to run it.
>
>
>
> The simplest way is to add the 'shake-build' folder to the GHC tree and
>
> ask first adopters of the new build system to globally install the
>
> dependencies (ansi-terminal, mtl, shake, QuickCheck). Then 'build.sh'
>
> and 'build.bat' scripts should work.
>
>
>
> I am open to suggestions on how to make this more convenient and
>
> robust. I've never used anything more advanced than a global cabal
>
> installation, so I'd appreciate input from more experienced users.
>
>
>
> Could you create a ticket on github suggesting possible approaches?
>
> I'm afraid our discussion may get lost in ghc-devs mailing list.
>
>
>
> Many thanks!
>
> Andrey
>
>
>
> > From: David Luposchainsky <dluposchainsky at googlemail.com>
>
> > To: ghc-devs at haskell.org
>
> > Subject: Re: [ANNOUNCE] Shaking up GHC
>
> > Message-ID: <56A27EB1.1080701 at gmail.com>
>
> > Content-Type: text/plain; charset=windows-1252
>
> >
>
> > Great work Andrey!
>
> >
>
> > I'm actually (pleasantly) surprised this is becoming part of the GHC
>
> > tree so soon
>
> > .
>
> >
>
> > Are there any plans as to how to include it in the GHC tree? Does it
>
> > ship with
>
> > all the libraries required to build the build system, will we have a
>
> > mini-build
>
> > system to bootstrap it? If I recall correctly, we rely on Cabal
>
> > sandboxes on
>
> > Linux/OSX and global Cabal library installations on Windows in order to
>
> > run it.
>
> >
>
> > Greetings,
>
> > David
>
> _______________________________________________
> ghc-devs mailing list
> ghc-devs at haskell.org
> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>
>
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