Finally I found what I had in mind, see $Config{sitelib}/sitecustomize.pl in perlrun

But contrary to toolic's PERL5OPT it's site-wide, so better think twice about what could be affected.

Cheers Rolf

In reply to Re^3: Permanent <<use feature ":5.10";>> by LanX
in thread Permanent <<use feature ":5.10";>> by juliosergio

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