$ cat test1.pl

#! /usr/bin/perl

use warnings;
use strict;

use vars qw( $name );

$name = 'Matt';
require 'test2.pl';


$ cat test2.pl

#! /usr/bin/perl

use warnings;
use strict;

print "Hello, $name!\n";

1;

$ ./test1.pl
Hello, Matt!

$ perl -c test2.pl
Global symbol "$name" requires explicit package name at test2.pl line 6.
test2.pl had compilation errors.