I've been getting this for awhile, and a cvs update last night didn't
solve it. Is something broken in the makefiles, or do I have something
locally corrupt (in other words - is anybody else getting this error?)

  # make install
  [ lots of messages ...]

  install.man in doc/man/Xau done
  make: don't know how to make install. Stop
  *** Error code 2

  Stop.
  #