A number of prebuilt binary packages are available for the major platforms. These packages have been compiled against Tcl 8.6. TclRAL also has a TEA compliant build scheme and cloning the repository will give you access to all the source. Building is the usual configure, make scheme.
The following links are to package files suitable for installing with the teacup program.
The following links are to Tcl modules. The module for ral is a multi-platform module and can be used on Linux x86_64, Windows x86_64, and MacOSX. Module files need only be placed in a directory somewhere in your module path (see ::tcl::tm::path list command).
Man page documentation is also available.
The companion package, ralutil, is a Tcl only package that provides a set of convenience procedures.