Your beset bet is probably a full reinstall of the xcc.
make xcc-upgrade-from-scratch
This will remove all traces of your cross compiler, rebuild it,
reinstall it, and then remake your kernel and all bundled userspace
libraries, prgorams, and tests (including busybox).
It's the most complete "rebuild-the-world" target, but it also takes
the longest (about 10 minutes on my workstation). Given your error
though, this is probably the way to go since you appear to be pretty
far behind on your upgrades.
--
~Kevin