Perl include file dynamically -

i have doubt in perl , need filename in command line arguments/switches/options , based on need include/require/use file in script. using getopt variable able done. if have used "use strict" in script not it. please on this

i tried follows , working

base.pm:

our $def_name = "me"; 

main.pl:

my $name = "mathlib.pm"; require $name; print $def_name; 

when include follwoing lines in main.pl , base.pm,

use strict; use warnings; 

i getting error,

global symbol "$def_name" requires explicit package name . execution of main.pl aborted due compilation errors. 

$def_name hasn't been exported mathlib.pm, it's package variable not global. $mathlib::def_name work, or can use exporter module export namespace of module uses it.