slackbuilds_ponce/development/thread

Tcl Thread extension.
You can use this extension to gain script-level access to Tcl
threading capabilities.
The extension can be used with Tcl cores starting from Tcl8.4 and later.
Also, this extension supports, i.e. can be used as a loadable module of,
AOLserver 4.x series of the highly-scalable web server from America Online.

You need to have your Tcl core compiled with "--enable-threads".