[AUCTeX] Symbol's function definition is void: regexp-opt

[Nicola Ceccarelli]

Dear all,
I tried to install auctex 11.55 on Mandrake 10.1.... but aftert a "make" I got 
the following error :

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Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex.el...
Wrote /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex.elc
Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-buf.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-buf.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing tex-buf.el:
Symbol's function definition is void: regexp-opt


Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/latex.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/latex.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing latex.el:
Symbol's function definition is void: regexp-opt


Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-info.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-info.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing tex-info.el:
Symbol's function definition is void: regexp-opt


Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/texmathp.el...
Wrote /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/texmathp.elc
Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/multi-prompt.el...
Wrote /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/multi-prompt.elc
Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-mik.el...
Wrote /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-mik.elc
Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/font-latex.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/font-latex.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing font-latex.el:
Symbol's function definition is void: regexp-opt


Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-font.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-font.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing tex-font.el:
Symbol's function definition is void: regexp-opt


Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/context.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/context.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing context.el:
Symbol's function definition is void: regexp-opt


Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/context-en.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/context-en.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing context-en.el:
Symbol's function definition is void: regexp-opt


Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/context-nl.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/context-nl.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing context-nl.el:
Symbol's function definition is void: regexp-opt


Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-fold.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-fold.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing tex-fold.el:
Symbol's function definition is void: regexp-opt


Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/toolbar-x.el...
Wrote /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/toolbar-x.elc
Compiling /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-bar.el...
While compiling toplevel forms in 
file /home/ceccanico/download/linux/AUC_Tex/auctex-11.55/tex-bar.el:
  !! Symbol's function definition is void ((regexp-opt))
>>Error occurred processing tex-bar.el:
Symbol's function definition is void: regexp-opt

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Done
make: *** [lisp] Error 1


anyone suggestions?

Nicola