+
+ <sect id="perl_upgrades">
+ <heading>Perl Package Upgrades</heading>
+ <p>
+ Starting from <package>perl</package> 5.12.3-2, a dpkg trigger
+ named <var>perl-major-upgrade</var> will be triggered by the
+ postinst of the <package>perl</package> package during major
+ upgrades. Some examples of things which constitute a major upgrade
+ are an upgrade which would change the value of versioned
+ directories in <tt>@INC</tt>, or one which changes <tt>abiname</tt>.
+ Any package may declare an interest in the trigger, especially
+ packages including long-running daemons which would stop working
+ until restart.
+ </p>
+ <p>
+ It is suggested that such packages include an appropriate section
+ in their postinst to handle the trigger by restarting relevant
+ daemons or notifying users of further action.
+ </p>
+ </sect>