-Occasionally the file "lisp/loaddefs.el" will need be updated to
-reflect new autoloaded functions. If you see errors about undefined
-lisp functions during compilation, that may be the reason. Another
-symptom may be an error saying that "loaddefs.el" could not be found;
-this is due to a change in the way loaddefs.el was handled in CVS, and
-should only happen once, for users that are updating old CVS trees.
+Occasionally the file "lisp/loaddefs.el" (and similar automatically
+generated files, such as esh-groups.el, and *-loaddefs.el in some
+subdirectories of lisp/, e.g. mh-e/ and calendar/) will need to be
+updated to reflect new autoloaded functions. If you see errors (rather
+than warnings) about undefined lisp functions during compilation, that
+may be the reason. Another symptom may be an error saying that
+"loaddefs.el" could not be found; this is due to a change in the way
+loaddefs.el was handled in CVS, and should only happen once, for users
+that are updating old CVS trees. Finally, sometimes there can be build
+failures related to *loaddefs.el (e.g. "required feature `esh-groups'
+was not provided"). In that case, follow the instructions below.