I've got a largish project to which I've just added some XS code, and I'd like to keep the top-level directory as clean as possible. I want to put the XS file and typemap et al. into a subdirectory, but if I do, MakeMaker can't find them. So right now, they're just sitting out in the project root.
How to I tell MakeMaker to look in a subdirectory for the XS stuff so it can be built from there?