# Build loaddefs.el to make sure it's up-to-date. If it's not, that
# might lead to errors during the bootstrap because something fails to
# autoload as expected. If there is no emacs binary, then we can't
-# build autoloads yet. In that case we have to use ldefs-boot.el;
-# bootstrap should always work with ldefs-boot.el. (Because
-# loaddefs.el is an automatically generated file, we don't want to
-# store it in the source repository).
+# build autoloads yet. In that case we have to use ldefs-boot.el.
+# Bootstrap should always work with ldefs-boot.el. Therefore,
+# whenever a new autoload cookie gets added that is necessary during
+# bootstrapping, ldefs-boot.el should be updated by overwriting it with
+# an up-to-date copy of loaddefs.el that is uncorrupted by
+# local changes. (Because loaddefs.el is an automatically generated
+# file, we don't want to store it in the source repository).
bootstrap-prepare:
if test -x $(EMACS); then \