building cygwin

I'm going to create a standard dist for cygwin. In order to do so, according to the porting guide I need to build a set of .hc files with mingw32(same hardware) and then use hc-build with those. To create the hc files from mingw32 for use with cygwin I should just have to define toplevel build.mk as follows is that correct? GhcLibHcOpts += -keep-hc-files GhcStage1HcOpts += -keep-hc-files GhcStage2HcOpts += -keep-hc-files and then use 'find' to pull out all of the .hc files. After that It should be fairly simple to get a Cygwin build going right? -Ben