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It depends on what you mean by "32 or 64 version".


If you want to check if it uses 32-bit integers or 64-bit integers, use the following:

perl -V:ivsize # use Config; say $Config{ivsize}
  • If the returned value is 4, your Perl uses 32-bit integers.
  • If the returned value is 8, your Perl uses 64-bit integers.

If you want to check if it uses 32-bit pointers or 64-bit pointers, use the following:

perl -V:ptrsize # use Config; say $Config{ptrsize}
  • If the returned value is 4, your Perl can address 4 GB of RAM.
  • If the returned value is 8, your Perl can address "unlimited" RAM.

If you want to check if it's a 32-bit program or a 64-bit program, use the following:

perl -V:archname # use Config; say $Config{archname}
  • If the returned value includes x86_64, it's a 64-bit process.
  • If the returned value includes x86 (but not x86_64), it's a 32-bit process.

This value is also included in the output of perl -v.


Note: You shouldn't be checking use64bitint or use64bitall as these indicate what parameters were passed to Configure rather than provide information about what was actually used.


Copied from How can I check whether my Perl installation is 32 or 64 bit? on StackOverflow.


In reply to Re: Perlbrew 32 or 64 Perl by ikegami
in thread Perlbrew 32 or 64 Perl by Anonymous Monk

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