bug#55178: ghc cannot find libraries of ghc-comonad

[Simon Tournier]

Hi Christoph,

On Sat, 21 Jan 2023 at 13:49, Lars-Dominik Braun <lars@6xq.net> wrote:

>> guix shell --pure ghc ghc-comonad gcc-toolchain -- ghc LinkMe.hs
>> [1 of 1] Compiling Main             ( LinkMe.hs, LinkMe.o )
>> Linking LinkMe ...
>> ld: cannot find -lHScomonad-5.0.8-KDPzf2kORSz9Qeif8nQH6d
>> ld: cannot find -lHStransformers-compat-0.6.6-9ADqfwGTALm8Nq2ZeUpa4p
>> ld: cannot find -lHSindexed-traversable-0.1.1-Dfr00dUbJtB3rFEVdhtcE9
>> ld: cannot find -lHSdistributive-0.6.2.1-L7rr3EplzD03NITUnJxmCO
>> ld: cannot find -lHStagged-0.8.6.1-EiQY3za6Q5HE9cdvqupke2
>> ld: cannot find -lHSbase-orphans-0.8.5-Iz1X6ZIULaHC76vf03czEu
>> collect2: error: ld returned 1 exit status
>> `gcc' failed in phase `Linker'. (Exit code: 1)
>
> the problem here is that in Guix we link Haskell executables dynamically
> and sometimes move static libraries to a separate output without updating
> the config file (because otherwise it would create a reference, which
> we’re trying to avoid to save space).
>
> It works fine for me using
>
>       guix shell --pure ghc ghc-comonad gcc-toolchain@10 -- ghc --make 
> -dynamic -v LinkMe.hs

Does it fix your issue report in #55178?

    https://issues.guix.gnu.org/issue/55178

Closing?

Cheers,
simon