The command below may be helpful to other Gentoo users that prefer to cherry-pick their updates and want to cherry-pick a dev-lang/perl update with the additional (read: required) dependencies.
root shell
emerge -upD world |
egrep '^\[ebuild.*(dev-lang/perl|virtual/perl-|dev-perl/)' |
perl -pe 's/^\[.*?\] (.*?) .*$/=\1/' |
xargs emerge -1