good old [incr tcl] isn't as easy to get on RH as it used to. no rpms in sight.
trying to compile it all i had some problems with iwidgets against the
separate itcl3.3 itk3.3 packages ... going with the all in one itcl3.2.1
tarball seems to do the trick: ./configure --with-tcl=/usr/lib --with-tk=/usr/lib/ --with-itcl=..//itcl3.2.1 --prefix=/usr