[AUCTeX] Failure building AUCTeX

[Angelo Graziosi]

The following happens on Cygwin and GNU/Linux Kubuntu 8.04 with AUCTeX 
CVS rev. 5.1610 (Emacs is current trunk):

[...]
In toplevel form:
tex-buf.el:32:1:Error: Symbol's function definition is void: make-obsolote

[...]
In toplevel form:
latex.el:32:1:Error: Symbol's function definition is void: make-obsolote

In toplevel form:
tex-info.el:28:1:Error: Symbol's function definition is void: make-obsolote
[...]
In toplevel form:
font-latex.el:44:1:Error: Symbol's function definition is void: 
make-obsolote
[...]
In toplevel form:
context.el:52:1:Error: Symbol's function definition is void: make-obsolote

In toplevel form:
context-en.el:32:1:Error: Symbol's function definition is void: 
make-obsolote

In toplevel form:
context-nl.el:32:1:Error: Symbol's function definition is void: 
make-obsolote

In toplevel form:
tex-fold.el:48:1:Error: Symbol's function definition is void: make-obsolote
[...]
In toplevel form:
tex-bar.el:67:1:Error: Symbol's function definition is void: make-obsolote
[...]
In toplevel form:
tex-jp.el:35:1:Error: Symbol's function definition is void: make-obsolote
make: *** [lisp] Error 1

Cheers,
   Angelo.