To get Tcl/Tk to compile on Win32 systems with the EGCS compiler, you need patches available at
http://www.xraylith.wisc.edu/~khan/software/tcl/. 

See http://www.xraylith.wisc.edu/~khan/software/gnu-win32/ for more on Ming32, EGCS, and other free compilers for Win32
systems.