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[Serge D. Mechveliani]

Tim,

You write

> I'm trying to build DoCon which requires Haskell.
>
> Actually, I now understand the problem better.
> Haskell requires happy to build.
> happy requires Haskell to build. 
> (ldl is a compiler switch to haskell /usr/bin/ghc -ldl)
> So I need to install Haskell before I can build Haskell.
> I've installed it and am trying to continue the build.


Generally, concerning  Glasgow Haskell  (ghc)  installation and usage,

ask        glasgow-haskell-users@haskell.org

They know GHC and Haskell much better and will help promptly.
Explain them what system and processor you have.

GHC compiles and `makes' itself.
And for the  first time,   you need to install Glasgow Haskell  (ghc)
from  binary  distribution, not from source.
Take from       
              http://haskell.org/ghc/

the binary distribution appropriate to your system  
(Linux, Intel ... ?)
DoCon needs version     ghc-5.02.2  or  ghc-5.02.3

If you have  Debian Linux,  then install ghc-5.02.2 from the package
of Debian distribution.
Binary installation does  not  require the Happy parser to be 
installed earlier.

Then, see  install.txt  of  DoCon. 
Also I shall help  - only, after about April 25.

-----------------
Serge Mechveliani
mechvel@botik.ru