Re: buildroot uClibc busybox and associated tool versions

No direct answers, but look for lots of useful userland stuff via
Pengutronix PTXdist:
 =3D> http://www.pengutronix.de/software/ptxdist_en.html

And have you looked at Crosstool?
 =3D> http://kegel.com/crosstool/

You may find the results section especially useful if you want to
start with combinations that have already been found to work.