14. Creating and Using Tcl Script Libraries

Like any other modern programming language, Tcl allows you to group commonly used procedure definitions into libraries that can be used by many applications. A Tcl library can be as simple as a single script file defining a few utility procedures. Or you can combine multiple library script files into a single package that you can distribute. Packages also have version numbers associated with them, so applications can distinguish among different historic versions of a package and require specific ones.

Additionally, Tcl allows you to bundle entire Tcl applications or libraries into single-file packs called Starkits. Combined with the Tclkit single-file Tcl interpreter, this gives you a handy means of distributing your Tcl applications. You can even create a single-file application executable called a Starpack, which combines a Tclkit for a particular platform with a Starkit of your software.