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BUILDDIR="$(pwd)/build/itcl${ITCLVERS}"
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 Itcl 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
		# Itcl is required for Tcl 8.4 and Tcl 8.5

		exit 0
	fi

	if [ "${TCL_VERSION}" = "unknown" ]; then
		# If we don't know what version of Tcl we are building, build
		# Itcl just in case.

		exit 0
	fi

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

if [ ! -f "${SRC}" ]; then
	mkdir 'src' >/dev/null 2>/dev/null

	wget -O "${SRC}" "${SRCURL}" || exit 1
fi