On Thu, 2007-05-31 at 22:36 -0400, Peter Gavin wrote:

Oops, I guess I hit the send button too early :)

On 5/31/07, Peter Gavin wrote:

...

Ok, so I've taken a look at the cabal sources, and I've decided to add a very simple way for preprocessors to specify dependecies. Basically, I'm going to add a field to the PreProcessor datatype: calcDependencies :: (FilePath, FilePath) -> Verbosity -> IO [Module], that returns the modules that should be preprocessed before the source file passed as the first argument. The only preprocessor that will really take advantage of this is the C2hs one, of course. Then the preprocessSources function will call calcDependencies to build the dependency graph.

How does that sound?

That sounds sensible. I'm cc'ing the cabal-devel list which is the place to ask questions and get opinions and where patches should be sent for wider review by cabal hackers. Duncan