What does the --with-copy-persistent-files option do?

"Makavy, Erez (Erez)" <[email protected]>
Newsgroups gmane.network.net-snmp.user
Message-ID <AAB4B3D3CF0F454F98272CBE187FDE2F0A8BD646@is0004avexu1.global.avaya.com>
The manual says:
 
--with-copy-persistent-files=\"no\" Don't copy persistent files
                                       (or use \"yes\" to copy them).
                                       (Default: yes)

 
Copy the files to where? from where? when?
 
Thanks,
Erez Makavy
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