Just add base as dependency in the version constraints matching that base
that is delivered with your version of GHC.
Alan Buxton
Hi
I’ve recently set up a new Haskell working environment on Ubuntu 14.04. I installed the Ubuntu packaged version of Haskell platform.
My problem is that I can’t now get ghc-mod check to work if there is a cabal file in the current directory.
I am using:
· ghc-mod 5.2.1.2 compiled by GHC 7.6.3
· cabal 1.16.0.2
See below an extract of trying to run ghc-mod check in a directory that was empty until I just ran cabal init in it:
~/tmp-ghc-mod$ ls
Setup.hs tmp-ghc-mod.cabal
~/tmp-ghc-mod$ ghc-mod check Setup.hs
Setup.hs:1:1:Could not find module `Prelude'It is a member of the hidden package `base'.Perhaps you need to add `base' to the build-depends in your .cabal file.It is a member of the hidden package `haskell98-2.0.0.2'.Perhaps you need to add `haskell98' to the build-depends in your .cabal file.It is a member of the hidden package `haskell2010-1.1.1.0'.Perhaps you need to add `haskell2010' to the build-depends in your .cabal file.Use -v to see a list of the files searched for.
~/tmp-ghc-mod$ mv tmp-ghc-mod.cabal tmp-ghc-mod.cabal.NOT
~/tmp-ghc-mod$ ls
dist Setup.hs tmp-ghc-mod.cabal.NOT
~/tmp-ghc-mod$ ghc-mod check Setup.hs
Setup.hs:2:1:Warning: Top-level binding with no type signature: main :: IO ()
~/tmp-ghc-mod$
So… ghc-mod behaves as expected when there is no cabal file, but doesn’t behave as expected if there is a cabal file.
My google fu isn’t helping me out on this: the only issues I have seen are to do with a change in format of the cabal file in newer versions of cabal.
Any ideas?
Thanks
Alan
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