Strange Emacs autoloaded library

[a at zeos.net]

On Thu, Jan 11, 2007 at 09:20:57AM -0500, Lowell Gilbert wrote:
> a at zeos.net writes:
> 
> >> I have removed the files
> >> menu-bar.el.gz
> >> menu-bar.elc
> >> from /usr/local/share/emacs/22.0.50/lisp.
> >> But load-history variable still shows me
> >> /usr/local/share/emacs/22.0.50/lisp/menu-bar.elc
> >> loaded and menu-bar appeared at emacs startup.
> >> 
> >> What is this?
> >> 
> >> Any other library from /usr/local/share/emacs/22.0.50/lisp/
> >> does not load being deleted.
> >> 
> >> Elisej Babenko
> >
> > I was wrong with the last thesis:
> > startup.el.gz
> > startup.elc
> > and may be some other libraries behave in the same strange manner.
> > They are loaded being deleted from /usr/local/share/emacs/22.0.50/lisp/.
> >
> > My question is the same.
> 
> Some libraries are dumped with the executable. 

Where such a dumping is described?
I want to prevent some libraries from dumping into the executable.
Is it possible during port building?

Thank you in advance.