Cabal problems with an executable containing c-sources

[Einar Karttunen]

Hello

The following case seems to be broken:

Name:           tt
Version:        0.0
License:        BSD3

Executable:     tt
Main-Is:        test.hs
C-Sources:      a.c
Extensions:     ForeignFunctionInterface

a.c is completely ignored by Cabal.

A complete minimal example can be found at:
http://www.cs.helsinki.fi/u/ekarttun/haskell/executable-with-c-sources.tar.gz

- Einar Karttunen