The Perl approach is to create a type that's large enough to store an int or a pointer: IV. Apparently, it's not used properly everywhere, or it's misconfigured in your environment.

I know that there were a number of places where I32 was used where it shouldn't, and IV values were assigned to STRLEN variables, even though the latter can be smaller. I fixed those problems in substr for 5.12.0, but some remain elsewhere.

In reply to Re: [OT] LLP64 .v. LP64 portability by ikegami
in thread [OT] LLP64 .v. LP64 portability by BrowserUk

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