I don't mind pointing out that either solution, compiler independent pragmas or extension import lists, would be great for the Library Infrastructure Project, since it will save us from having to include per-file command-line flags in a package configuration database (see my message to libraries@haskell.org from yesterday). Also I've mentioned several times that I think it would be great if we had another flag which turned on the features that are shared between the major Haskell implementations. So for each implementation, there would be three modes, haskell98, kitchen-sink, and shared-options, the last of which turns on extentions like multi-param type classes and hierarchical modules that are implemented in a standard way. This way, the user can tell that they're writing mostly portable code (though with no guarantees as to future compatibility). It also could possibly be used as a staging ground for the next version of Haskell once there's a "feature freeze". peace, isaac