Who should be generating lists of files?

As part of cabal-rpm, I'd like to be able to package up profiling versions of libraries in a separate system-level package from normal libraries, to reduce bloat. What's the best way for me to get a list of the files that would be installed by Setup copy, and determining which are profiling files vs normal? Should I be faking this up inside cabal-rpm, or pushing the knowledge out to Cabal itself?