Note -E doesn't turn on strict, AFAICT its equivalent is -Mfeature=:all.
Update: Sorry, that's not quite right - :all also enables experimental features and features that were removed from feature bundles of later versions, like array_base. I showed a slightly hackish workaround here.
Update 2: Here's an improved version that gives exactly the same result as the -E switch:
use Config;
use feature ":$Config{PERL_REVISION}.$Config{PERL_VERSION}";
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