Jim, After playing around for a bit on IRIX 6.5, I still haven't managed any significant progress on making nhc98 compile correctly there. However, I did get it to bootstrap correctly on an IRIX 5.3 machine. I recall in the past being able to use an executable on 6.x that had been compiled on 5.x, so I tried that here, and it kind of works. That is to say, the bootstrapped compiler runs and produces correct code, but the 6.x linker refuses to link the 6.x object file with the 5.x libraries we built earlier. The error message is: ld32: FATAL 12 : Expecting n32 objects: /grp/haskell/lib/nhc98/mips-IRIX6/main.o is o32. Can you shed any light what this might mean? Am I inadvertently using an SGI-linker rather than the Gnu one? In any case, I suspect that the linker is the underlying cause of our failure to produce a working nhc98 on 6.x in the first place. Regards, Malcolm