Hello, http://distcc.samba.org/problems.html#MD says: "This problem can only occur if you're using gcc 3.0 or later, have the source and object files in different directories or under different names, and you are not using -MD or -MMD but not -MF. " That ywin not in last line is probably a typo ? "... and you are using -MD or -MMD but not -MF." perhaps ? :-) Blaz Antonic