in reply to reliably test integer size for portable bit-fiddling?

I think so. Perhaps, it is also an option for you to ask perl itself with the help of core module Config? 

 perl -e 'use Config; print $Config{use64bitint} eq "define" ? "yes, "
+ : "not ", "64bit perl\n"'

[download]

Result (here): 

yes, 64bit perl

[download]

Replies are listed 'Best First'.
Re^2: reliably test integer size for portable bit-fiddling?
by Tux (Canon) on Dec 09, 2014 at 07:32 UTC

    For that kind of inquiry, perl has extended use for the -V option, supporting regular expressions et all:

    $ perl -V:'use64bit(int|all)|[iu]vsize'
ivsize='8';
use64bitall='define';
use64bitint='define';
uvsize='8';

    [download]

    Enjoy, Have FUN! H.Merijn
[reply]
[d/l]
[select]

In Section Seekers of Perl Wisdom