Sequence of commands after checking out trunk:
make maintainer-clean ;; I noticed many changes in trunk from last  
check out
./configure --enable-carbon-app
make bootstrap


Loading /Users/scotty/Sources/emacs/lisp/term/mac-win.el (source)...
Cannot open load file: url
make[2]: *** [bootstrap-emacs] Error 255
make[1]: *** [bootstrap-build] Error 2
make: *** [bootstrap] Error 2

Inspection of the require doesn't immediately jump out as being wrong  
to me...

(eval-when-compile (require 'url))