[Haskell-beginners] Problems with installing lambdabot

[Brent Yorgey]

Aha, I just found this which you may find helpful:

  https://github.com/DanBurton/lambdabot-remedies

-Brent

On Tue, Jul 03, 2012 at 08:51:33PM -0400, Brent Yorgey wrote:
> This is what I mean by lambdabot being notoriously difficult to
> install.  If you work through this one there will probably be another,
> and another... I did get it to compile once but it took quite a bit of
> effort.
> 
> You would probably be better off getting lambdabot's source from the
> darcs repository (http://code.haskell.org/lambdabot/) and trying to
> build that.  Note that the last upload of the lambdabot package to
> Hackage was in January 2011 -- no one has a particular incentive to
> make sure the package stays up-to-date.
> 
> This particular error, I think, is caused by a change in the way GHC
> handles certain extensions.  Apparently lambdabot has not been updated
> to match.  You could fix it by editing Plugin/Activity.hs and adding 
> 
> {-# LANGUAGE FlexibleInstances #-}
> 
> to the top.
> 
> -Brent
> 
> On Tue, Jul 03, 2012 at 11:23:58PM +0200, Antoras wrote:
> > Ok, after changing this the linker error is gone. But now I get a
> > compile error close to the place the linker error previously
> > occurred:
> > 
> > 
> > [28 of 79] Compiling Plugin.Activity  ( Plugin/Activity.hs,
> > dist/build/lambdabot/lambdabot-tmp/Plugin/Activity.o )
> > [...]
> > Loading package IOSpec-0.2.5 ... linking ... done.
> > 
> > Plugin/Activity.hs:18:10:
> >     Illegal instance declaration for `Module
> >                                         ActivityModule ActivityState'
> >       (All instance types must be of the form (T a1 ... an)
> >        where a1 ... an are *distinct type variables*,
> >        and each type variable appears at most once in the instance head.
> >        Use -XFlexibleInstances if you want to disable this.)
> >     In the instance declaration for `Module ActivityModule ActivityState'
> > cabal: Error: some packages failed to install:
> > lambdabot-4.2.3.2 failed during the building phase. The exception was:
> > ExitFailure 1
> > 
> > 
> > On 07/03/2012 09:47 PM, Brandon Allbery wrote:
> > >On Tue, Jul 3, 2012 at 3:16 PM, Antoras <mail at antoras.de
> > ><mailto:mail at antoras.de>> wrote:
> > >
> > >    Loading package readline-1.0.1.0 ... <command line>: can't load
> > >    .so/.DLL for:
> > >    /usr/lib/gcc/x86_64-unknown-linux-gnu/4.7.1/../../../../lib/libncurses.so
> > >    (-lncursesw: cannot open shared object file: No such file or
> > >    directory)
> > >
> > >
> > >Your Linux distribution pulled a cute stunt that throws the dynamic
> > >loader (used for TH and ghci and a few other things) for a loop:
> > >libncurses.so, for backward compatibility purposes, is a GNU ld
> > >linker script which references libncursesw.so in a way the dynamic
> > >loader doesn't understand.  You can work around this in one of two
> > >ways:
> > >
> > >1. replace /usr/lib/libncurses.so with a symlink to
> > >/usr/lib/libncursesw.so; OR
> > >2. edit /usr/lib/libncurses.so, which is a text file (linker
> > >script), to reference "/usr/lib/libncursesw.so" instead of
> > >"-lncursesw".
> > >
> > >-- 
> > >brandon s allbery allbery.b at gmail.com <mailto:allbery.b at gmail.com>
> > >wandering unix systems administrator (available)     (412) 475-9364 vm/sms
> > >
> > 
> > 
> 
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