Index: kitcreator
==================================================================
--- kitcreator
+++ kitcreator
@@ -20,14 +20,19 @@
 	mode="distclean"
 fi
 
 CONFIGUREEXTRA="$@"
 export CONFIGUREEXTRA
+
+# Add packages implied by the additional arguments
+if echo " ${CONFIGUREEXTRA} " | grep ' --enable-threads' >/dev/null 2>/dev/null; then
+	ADDPKGS="${ADDPKGS} thread"
+fi
 
 failedpkgs=""
 buildfailed="0"
-for pkg in tcl tk itcl mk4tcl tclvfs zlib kitsh; do
+for pkg in tcl tk itcl mk4tcl tclvfs zlib ${ADDPKGS} kitsh; do
 	if [ "${mode}" = "distclean" ]; then
 		rm -rf "${pkg}/src"
 	fi
 
 	if [ "${mode}" = "clean" -o "${mode}" = "distclean" ]; then

ADDED   thread/build.sh
Index: thread/build.sh
==================================================================
--- thread/build.sh
+++ thread/build.sh
@@ -0,0 +1,57 @@
+#! /bin/bash
+
+if [ ! -f 'build.sh' ]; then
+	echo 'ERROR: This script must be run from the directory it is in' >&2
+
+	exit 1
+fi
+if [ -z "${TCLVERS}" ]; then
+	echo 'ERROR: The TCLVERS environment variable is not set' >&2
+
+	exit 1
+fi
+
+THREADVERS="2.6.5"
+SRC="src/thread-${THREADVERS}.tar.gz"
+SRCURL="http://sourceforge.net/projects/tcl/files/Thread%20Extension/${THREADVERS}/thread${THREADVERS}.tar.gz/download"
+BUILDDIR="$(pwd)/build/thread${THREADVERS}"
+OUTDIR="$(pwd)/out"
+INSTDIR="$(pwd)/inst"
+export ITCLVERS SRC SRCURL BUILDDIR OUTDIR INSTDIR
+
+rm -rf 'build' 'out' 'inst'
+mkdir 'build' 'out' 'inst' || exit 1
+
+if [ ! -f "${SRC}" ]; then
+	mkdir 'src' >/dev/null 2>/dev/null
+
+	rm -f "${SRC}.tmp"
+	wget -O "${SRC}.tmp" "${SRCURL}" || exit 1
+	mv "${SRC}.tmp" "${SRC}"
+fi
+
+(
+	cd 'build' || exit 1
+
+	if [ ! -d '../buildsrc' ]; then
+		gzip -dc "../${SRC}" | tar -xf -
+	else    
+		cp -rp ../buildsrc/* './'
+	fi
+
+	cd "${BUILDDIR}" || exit 1
+	./configure --enable-shared --disable-symbols --prefix="${INSTDIR}" --exec-prefix="${INSTDIR}" --with-tcl="${TCLCONFIGDIR}" ${CONFIGUREEXTRA}
+
+	${MAKE:-make} || exit 1
+
+	${MAKE:-make} install
+
+	mkdir "${OUTDIR}/lib" || exit 1
+	cp -r "${INSTDIR}/lib"/thread*/ "${OUTDIR}/lib/"
+
+	"${STRIP:-strip}" -g "${OUTDIR}"/lib/thread*/*.so >/dev/null 2>/dev/null
+
+	exit 0
+) || exit 1
+
+exit 0