You may find the specification file, that you can use to build the rpm
binaries on your Redhat (Suse may also work) system at:
  http://jfontain.free.fr/tcltk-8.4.4-1.spec

To build, download the Tcl/Tk 8.4.4 and Thread 2.5.2 sources from
http://prdownloads.sourceforge.net/tcl/ into your
/usr/src/redhat/SOURCES/ directory, place the specification file in
your /usr/src/redhat/SPECS/ directory, then from that directory, type:
  # rpmbuild -bb --clean tcltk-8.4.4-1.spec

Note: you may change the installation directory and turn on the thread
extension at the beginning of the specification file.

Jean-Luc Fontaine (http://jfontain.free.fr/)