C:\>type test.pl
#!/usr/bin/perl

use strict;
our ( $HELLO, $WORLD );

# fake the behaviour of -s
{
    no strict;
    my @other = ();
    while(my $term = shift @ARGV) {
        $term =~ s/^\-/\$/ ? eval $term : push @other, $term;
    }
    @ARGV = @other;
}

print "Got $HELLO $WORLD\n";
print "\@ARGV = ( @ARGV )\n";

C:\>perl test.pl -HELLO=hello -WORLD=world other arguments
Got hello world
@ARGV = ( other arguments )