Description of problem:
I saw you sent rrdtool spec file of Fedora Extras upstream - fine! But in cases 
like this I would like to see the subpackages/rrd bindings conditional, because 
not everybody likes PHP or Python binding always when building rrdtool RPM from 
upstream spec file.

As I'm rebuilding the Extras rrdtool package always for different reasons, I 
just conditionalized the packages and added the missing tcl subpackage/binding. 
Maybe you can apply the patch to the next build. Everything should behave like 
in the past, but there's the new rrdtool-tcl subpackage now. If you don't like 
it for Fedora Extras, just change the line
  %{!?with_tcl:%define with_tcl 1}
to
  %{!?with_tcl:%define with_tcl 0}
for getting the old behavior.

Version-Release number of selected component (if applicable):
rrdtool-1.2.15-3

Actual results:
Missing rrdtool-tcl subpackage/binding, non-conditional bindings.

Expected results:
Apply of my attached patch or better ;-)

Additional info:
I didn't conditionalize the perl binding/subpackage, because perl is a build 
requirement, so it doesn't make really sense in my eyes.