Before I go too far here, is there a CPAN module I'm overlooking?

There's Math::Int64 which has the Math::Int64::native_if_available pragma which sounds like it might be similar. I've not used it though so may have misunderstood either it or indeed your post.

🦛

In reply to Re: Supporting 64-bit ints on 32-bit perl by hippo
in thread Supporting 64-bit ints on 32-bit perl by NERDVANA

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