"Stephen J. Turnbull" <stephen(a)xemacs.org> writes:
 (1) synch to GNU Emacs's regexp engine (Stefan Monnier did a
_lot_ of
     work on it---he is extremely busy now but might be able to spare a
     clue or two; Jan Vroonhof, also very busy, has looked at this in
     the past) 
There were some discussions on emacs-devel recently on syncing with
GNU libc's regexp stuff.  Reducing the number of slightly different
regexp implementations in the GNU world would be a good idea...