tclkit.exe is a single-file Tcl/Tk runtime. The one included in TeX Live is generated with kitcreator. This program downloads and compiles tcl, tk and various pieces of infrastructure. I used kitcreator's README file for guidance in generating tclkit.exe: from the root of the unpacked kitcreator archive I first created a native Linux tclkit: ./kitcreator mv tclkit-8.6.8 tclkit-local From this same directory I ran the following script: ================ #!/bin/bash export TCLKIT=`pwd`/tclkit-local export CROSS=i686-w64-mingw32 export CC=${CROSS}-gcc export CXX=${CROSS}-c++ export AR=${CROSS}-ar export RANLIB=${CROSS}-ranlib export STRIP=${CROSS}-strip export RC=${CROSS}-windres ./kitcreator --host=${CROSS} mv tclkit-8.6.8 tclkit.exe ================ This directory contains the archives of kitcreator and the archives it downloaded during the build process. The LICENSE file is the one I found in the root of the kitcreator archive. As to the urls of the downloaded files: a command find . -name "build*.sh" -exec grep '^SRCURL=' \{} \; generated the following output: SRCURL="http://sourceforge.net/projects/incrtcl/files/%5BIncr%20Tcl_Tk%5D-source/Itcl%20${ITCLVERS}/itcl${ITCLVERS}${ITCLVERSEXTRA}.tar.gz/download" SRCURL="http://prdownloads.sourceforge.net/tcl/tcl${TCLVERS}-src.tar.gz" SRCURL="http://sourceforge.net/projects/tcl/files/Thread%20Extension/${THREADVERS}/thread${THREADVERS}.tar.gz/download" SRCURL="http://www.equi4.com/pub/mk/metakit-${MK4VERS}.tar.gz" SRCURL="http://pkgs.fedoraproject.org/repo/pkgs/metakit/metakit-${MK4VERS}.tar.gz/17330257376eea657827ed632ea62c9e/metakit-${MK4VERS}.tar.gz" SRCURL="http://prdownloads.sourceforge.net/tcl/tk${TCLVERS}-src.tar.gz" The itcl- and thread- packages listed above were not actually downloaded. Siep Kroonenberg November 2018