c:\test>\perl32\bin\perl.exe \perl32\bin\p1.pl
print length pack 'J', 1;;
4
print length pack 'L', 1;;
4
Terminating on signal SIGINT(2)

c:\test>\perl64\bin\perl.exe \perl64\bin\p1.pl
print length pack 'J', 1;;
8
print length pack 'L', 1;;
4