depend on object files that depend on source code that depend on header files, I hoped that it would be just easy to have arbitrary other targets depend on similarly complex input (in my case: the same minus one file). I put some hope in the "output_required_files()" command but it always outputs nil. Kolja -- mr. kolja waschk - haubach-39 - 22765 hh - germany fon +49 40 889130-34 - fax -35 - http://www.ixo.de