I also failed to communicate something that impacts what you wrote. I work on system tools that rely on the customer's OS version of Perl.
We don't embed Perl into the tool, and the customer base tends to use older OS versions.
Ha ha, you're the second person this week to surprise me!
Thanks for pointing it out.
Because all my experience (with both Perl and C++) is in an environment where we control the version of the language
and libraries, I just blindly assume that is the case for everyone. Next time, I'll ask first. :)