Seems to me that given the state of affairs, it is best to just leave it as it is this round: That is GHC is built split-obj, but the HP libs on Windows are not. In general, split-obj only makes executables smaller at the expense of link time and memory. It is a trade-off, and I'd make the call for faster link, and now uncertainty for now. So, unless there is objection, I'd call RC4 final for Windows. - Mark