1.1

* Thomas Kahle <tom111@...>:
> In an ebuild, how can I specify that a package needs to be rebuild after
> an upgrade of perl ?

You can't.
But perl ebuild recommends to run ´perl-cleaner´ after upgrading: 

,-- man perl-cleaner
| Clean up old perl installations, attempting to emerge --oneshot
| packages left over from a perl upgrade, as well as any packages that
| linked against the old version of libperl.so.
'--

Is this what you are looking for?
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