Hi Gerry. The missing symbols look to be something which should be provided by Tcl's stubs library, i.e. libtclstub.a or whatever the equivalent name under Windows(tm). I suspect that whatever Makefile you use is not supplying this library to the link step, or supplying it incorrectly. As I am not firm (anymore) with regard building on Windows, I would recommend/propose to ask the question on the tcl-core mailing list, and then feed any corrections you get back to Richard so that he can update the Makefile in question. IIRC Jan Nijtmans is doing Windows-builds, and listening on Tcl-core. Other names I remember as associated with Tcl on Windows are Harald Oehlmann and Francois Vogel, also on that list. Hopefully this helps.