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

# Determine if Threads is even needed
(
	TCL_VERSION="unknown"
	if [ -f "${TCLCONFIGDIR}/tclConfig.sh" ]; then
		source "${TCLCONFIGDIR}/tclConfig.sh"
	fi

	if echo "${TCL_VERSION}" | grep '^8\.[45]$' >/dev/null; then
		# Threads may be required for Tcl 8.4 and Tcl 8.5

                exit 0
        fi

	if [ "${TCL_VERSION}" = "unknown" ]; then
		# If we dont know what version of Tcl we are building, build
		# Threads just in case.

		exit 0
	fi

	# All other versions do not require Threads
	echo "Skipping building Threads, not required for ${TCL_VERSION}"
	exit 1
) || exit 0

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