Many TEA based Tcl extensions, when found in a CVS such as one finds at SourceForge, have need of a config or tclconfig directory that isn't found in the CVS.
The contents of this directory can be found in the sampleextension module that is a part of http://tcl.sf.net/ . It contains some TEA specific files.
Note that this directory is not directly related to tclConfig.sh , however, both are a part of the Tcl Extension Architecture.