globally enabling procmail with exim

[Pierfrancesco Caci <ik5pvx@penny.ik5pvx.ampr.org>]

Hello,
I would like to activate a virus scanning system that is based on
procmail.
I would like to do this globally for every user on my system, but from
the configuration examples and docs of exim, I understand that
procmail is by default called only if a ~/.procmailrc file is
present. 
How should I modified exim's config so as to check for existance of
/etc/procmailrc first and then continue as before to check for the
private ones?

Thanks 

Pf

-- 

-------------------------------------------------------------------------------
 Pierfrancesco Caci | ik5pvx | mailto:p.caci@tin.it  -  http://gusp.dyndns.org
  Firenze - Italia  | Office for the Complication of Otherwise Simple Affairs 
     Linux penny 2.4.7 #1 Thu Jul 26 14:48:56 CEST 2001 i686 unknown