building an embedded Linux distro into a RPM package

[Bruno Wolff III]

On Fri, Jul 24, 2015 at 23:05:07 -0400,
  Chuck Anderson <cra at WPI.EDU> wrote:
>
>Is there an existing Fedora "cross" toolchain for targeting a tiny
>i586/i686 Linux userspace with uClibc?  Maybe I could use that to
>build linuxpba and the PBA image itself.  I'd still need a custom
>kernel, because the standard kernel bzImage is already bigger than my
>entire PBA image, and that isn't counting the loadable modules.

openwrt builds on Fedora with very little work. The first part of that 
is building the cross tool chain it uses to build images.