redo-ifchange rc_vars
. ./rc_vars

NL="
"

# Escape double-quote and backslash so they can
# be included as a C-style double-quoted string.
cquote() {
	local v="$(printf '%s' "$1" | sed -e 's,[\"\\],\\&,g' -e 's,$, \\,')"
	printf '"%s"' "${v% \\}"
}

is_number() {
	expr "$1" + 1 >/dev/null 2>&1
}

(
	echo "/* Automatically generated by redoconf.h.od */"
	IFS="$NL"
	for k in $RC_KEYS; do
		[ "$k" != "RC_KEYS" ] || continue
		[ "$k" != "RC_INCLUDES" ] || continue
		eval v=\$$k
		if [ -z "$v" ]; then
			echo "#undef $k"
		elif is_number "$v"; then
			echo "#define $k $v"
		else
			echo "#define $k $(cquote "$v")"
		fi
	done
) >$3
redo-stamp <$3