Re: [Haskell-beginners] Problems with installing lambdabot

3 Jul 2012


      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 mailto:mail@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@gmail.com mailto:allbery.b@gmail.com
wandering unix systems administrator (available)     (412) 475-9364 vm/sms
...
_______________________________________________
Beginners mailing list
Beginners@haskell.org
http://www.haskell.org/mailman/listinfo/beginners
_______________________________________________
Beginners mailing list
Beginners@haskell.org
http://www.haskell.org/mailman/listinfo/beginners