[web-devel] GHCi runtime linker: fatal error: I found a duplicate definition for symbol (Yesod)

[Anton Cheshkov]

Hi Rick! I got the the same error day ago on my server. Probably it happens
because you have two *network* packages in you system.

Try to compile all your packages  only on  network-2.2.1.10, and delete
package network-2.3

Hope it helps you

2011/3/23 Rick Richardson <rick.richardson at gmail.com>

>
> I just installed the generic 7.0.2 binary on Ubuntu  on both 32 bit and 64
> bit machines.  Then I rm'd   .ghc and .cabal  then fetched the current
> haskell platform. Built and installed.
>
> After cabal installing all of the dependencies cabal said were required for
> yesod,  I run yesod.. the script creates the project.
>
> When executing runhaskell devel-server.hs  I get this message
>
> GHCi runtime linker: fatal error: I found a duplicate definition for symbol
>    ghczm7zi0zi2_AsmCodeGen_zdfMonadCmmOptM2_closure
> whilst processing object file
>    /usr/local/lib/ghc-7.0.2/ghc-7.0.2/libHSghc-7.0.2.a
> This could be caused by:
>    * Loading two different object files which export the same symbol
>    * Specifying the same object file twice on the GHCi command line
>    * An incorrect `package.conf' entry, causing some object to be
>      loaded twice.
> GHCi cannot safely continue in this situation.  Exiting now.  Sorry.
>
>
> it's the same on both 32 and 64 bit.
>
> Any ideas?   I am going to try to build 7.0.2 from source to see if that
> fixes it.
>
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>
>


-- 
Best regards,
Cheshkov Anton
Phone: +7 909 005 18 82
Skype: cheshkov_anton
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