> > Just to be sure, 15.sml (in my sources) is an empty file. > > Yes. I am continuing to investigate. I was messing up and not using the right x86codegen.h. I've now successfully done a NJ-G0, all the regressions, and then a G1 and G2. cvs ci done. BTW, here's the time to build G2 from G1. MLton finished in 290.73 + 205.25 (41% GC)