Thanks for the explanation. And if I want to add the package in Hackage then I should provide a Setup.hs On Thu, Jul 28, 2011 at 3:47 PM, Daniel Fischer wrote:

On Thursday 28 July 2011, 14:17:04, Ovidiu Deac wrote:

...

When I run cabal check I get the following message:

$ cabal check The following errors will cause portability problems on other environments: * The package is missing a Setup.hs or Setup.lhs script.

Hackage would reject this package.

...but except this the package builds fine so far and the executable runs fine.

So what does this exactly mean?

It means that, while cabal can build packages with the `simple' build type without a Setup.[l]hs, other ways to build and install a package, in particular the old

$ runhaskell ./Setup.hs configure $ runhaskell ./Setup.hs build $ runhaskell ./Setup.hs install

need a Setup.[l]hs. Most of the time the simple

module Main (main) where

import Distribution.Simple

main :: IO () main = defaultMain

works. If it doesn't, probably even cabal won't be able to build the package without a Setup script.

Cheers, Daniel