in reply to Re^2: Permanent <<use feature ":5.10";>>
in thread Permanent <<use feature ":5.10";>>

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 Section Seekers of Perl Wisdom