cabal-install does not recognise internal capability from Cabal 1.8

[bos]

(Imported from Trac #634, reported by @kowey on 2010-02-14)

If I understand correctly, Cabal 1.8 introduced a feature that lets our executable depend on a library from the same package (is this #89?).

We would very much like to use this for Darcs as this would speed up our build times dramatically, but it seems that the cabal-install tool does not know how to deal with this it yet. This means we can do "runghc Setup configure" but not "cabal configure"

Here is the patch that uses this for darcs: http://bugs.darcs.net/patch147

PS. I think this tracker may need to be updated with new versions (currently stops at 1.6)

[bos]

(Imported comment by @dcoutts on 2010-02-14)

Fixed in 0.8 branch. Confirmed to work by a darcs developer. Will be included in 0.8.2.