+#
+# make bootstrap
+# Recompiles all the Emacs Lisp files using the latest source,
+# then rebuilds Emacs.
+#
+# make bootfast
+# Recompiles changed Emacs Lisp files using the latest C source,
+# then rebuilds Emacs. This is faster than `make bootstrap'
+# but once in a while an old .elc file can cause trouble.