source subdirectory in package

[Simon Marlow]

On 13 June 2005 12:19, Serge D. Mechveliani wrote:

> Dear GHC developers,
> 
> I am testing Cabal in ghc-6.4.
> Consider a project of the modules        U1.hs, subdir/V1.hs
> put to the source root of                $(HOME)/user1/
> Provide some simplest source for U1, V1,
> and the package description
> 
> -- u1.cabal ---------------------
> name:            u1
> version:         0.0
> build-depends:   data
> exposed-modules: U1 V1
> ghc-options:     -isubdir
> ---------------------------------
> 
> Then,
>   runhaskell Setup.hs configure --ghc --prefix=$HOME/t/user1/inst
> and
>   runhaskell Setup.hs build
> yield
> 
>   Preprocessing library u1-0.0...
>   can't find source for V1 in ["."]

The Cabal in GHC 6.4 supports source files in a single directory only
(although you can use hierarchical module names).  To put your source
files in a subdirectory, add the field

  hs-source-dir: subdir

to your .cabal file.

The current version of Cabal allows multiple source directories, so you
can say

  hs-source-dirs: "." subdir

Cheers,
	Simon