Introduction to Tcl The Tcl package contains the Tool Command Language, a robust general-purpose scripting language. This package is known to build and work properly using an LFS-9.0 platform. http://www.linuxfromscratch.org/blfs/view/svn/general/tcl.html Download (HTTP): https://downloads.sourceforge.net/tcl/tcl8.6.10-src.tar.gz