I recently needed to use a few (slightly) non-standard encodings in a tclkit and wondered how I can register them at runtime. The solution that I eventually found was to copy the '''*.enc''' file into the ''encoding'' subdir of $tcl_library, like this:

 file copy shiftjis.enc [file join $tcl_library encoding]

For '''tclkit'''s the $tcl_library directory is a virtual one, so it's probably ok to mess around with it. Are there any solutions for plain tcl shells? 

At first, the '''encoding''' man page led me to beleive it would be enough to just append ''my-encodings-dir'' to the ''tcl_libPath'' variable but that doesn't work... 

Couldn't one have an encoding subcommand for this task, maybe something like "encoding create <name> <channel>" ?