How to get all options from Getopt Long without specifc knowledge of the params?
use Getopt::Long qw(GetOptionsFromArray);

my %options;

my @opt_spec = qw(a:s b:s c:s d:s e:s f:s g:s h:s i:s j:s k:s l:s m:s n:s o:s p:s r:s q:s r:s s:s t:s u:s v:s w:s x:s y:s z:s);

Getopt::Long::GetOptions(%options, @opt_spec);

-a=-b -c -d -e -f g --h -- -i -j

my %options = (
    'a' => '-b',
    'c' => '',
    'd' => '',
    'e' => '',
    'f' => 'g'
    'h' => '',
);
@ARGV = (
   '-i',
   '-j',
);

my %options = (
    'a' => '-b',
    'c' => '-d',
    'e' => '-f',
    'h' => '--',
    'i' => '-j'
);
@ARGV = (
    'g',
);

my @opt_spec = map "$_:s", 'a'..'z';