Another speculation on whay you may want:

#Test getopt

use strict;
use warnings;
use Getopt::Long;

my %opt; # Main options
my %oa=( # Option attributes..
   this=>  { type=>'i', ifset=>sub{print qq(this is set\n)} },
   that=>  { type=>'s' },
   other=> { type=>'i' , ifset=>sub{print qq(Other is set=) .shift().q
+q(\n)} }
   );

my @GetOpt_str;

push @GetOpt_str ,"$_=$oa{$_}{type}" for keys %oa;
#print "\tOptStr=@GetOpt_str;\n";

GetOptions (\%opt ,   @GetOpt_str);

# Call all procs specified ..
exists $oa{$_}{ifset} and $oa{$_}{ifset}->($opt{$_})
   for keys %opt;


--Run with options and output---
>perl test-getopt.pl -other=44 -this=9999
Other is set=44
this is set
[download]

Note - the output is coming from the called sub's.