[incr Tcl] is an object-oriented extension of the Tcl language.  It
was created to support more structured programming in Tcl and
introduces the notion of objects. This object-oriented paradigm
adds another level of organization on top of the basic variable/procedure
elements, and the resulting code is easier to understand and maintain.

1. build dependencies:
   1. rpm-build-tcl >= 0.4-alt1
   2. tk-devel >= 8.5.0