How about breaking out the big system case construct from configure.in?

[Jeffrey A Law]

  In message < 200011011719.SAA01293@ignucius.axis.se >you write:
  > Into (say) config.gcc a' la bfd/config.bfd et al.  I'm thinking
  > of everything inside the "for machine in $build $host $target; do".
  > 
  > No more regenerating configure "every time a new target is added". ;-)
  > No more changequote errors.  It doesn't need autoconf constructs.
Seems reasonable to me.

jeff