This works for me:

$ cat 3perl.pl

use strict;
use warnings;
use 5.010;
use Getopt::Long;

Getopt::Long::Configure(qw{no_auto_abbrev no_ignore_case_always});

my $verbose = "";
GetOptions ('verbose|v' => \$verbose);

say $verbose;

[download]
$ perl 3perl.pl -v
1

$ perl 3perl.pl -V
Unknown option: V

$ perl 3perl.pl -verbose
1

$ perl 3perl.pl -Verbose
Unknown option: Verbose

$ perl 3perl.pl -ver    
Unknown option: ver

[download]

In reply to Re: How can I have both short and long options with Getopt::Long? by 7stud
in thread How can I have both short and long options with Getopt::Long? by Anonymous Monk

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