Which configure flag enables the "setuid/guid emulation" during compilation

Hi list,

I am trying to make my own perl586.info file for use with
http://finkproject.org/ to compile perl with the "setuid/guid
emulation" enabled.

Which configure flag enables this?

Shall I add "-Dd_dosuid=y" to the compilescript to overrule the
default value = n

NB.: I need this in order to test the backup solution backuppc
http://backuppc.sourceforge.net/  based on the requirements listed
here: http://backuppc.sourceforge.net/faq/BackupPC.html#step_9__cgi_interface
(see the last paragraph under "Standard Setup")

BR
Thomas von Eyben