A 'make' in a repository clone builds Emacs with the default configuration 
options.  It would be useful if those who want to build Emacs with other 
configuration options they already know could do that without going 
through the three-step ./autogen.sh; ./configure <options>; make.  Patch 
attached, with which it becomes possible to just say e.g.:

make configure=--with-x-toolkit=lucid