While the majority of Tcllib consists of packages written in pure Tcl
a number of packages also have [term accelerators] associated with them.

These are [syscmd critcl]-based C packages whose use will boost the
performance of the packages using them.

These accelerators are optional, and they are not built by default.
If they are built according to the instructions below then they will
also be installed as well.

[para] To build the accelerators the normally optional dependency on
       [syscmd critcl] becomes required.

[para] To build and install Tcllib with the accelerators in a
       Unix-like environment invoke:

[example {
  ./configure
  make critcl  # Builds the shared library and package holding
               # the accelerators, tcllibc
  make install # Installs all packages, including the new tcllibc.
}]

[para] The underlying tool is [file sak.tcl] in the toplevel directory
of Tcllib and the command [cmd {make critcl}] is just a wrapper around

[example {
  ./sak.tcl critcl
}]

[para] Therefore in a Windows environment instead invoke

[example {
  ./sak.tcl critcl
  ./installer.tcl
}]

from within a DOS window, i.e. [syscmd cmd.exe].