#=======================================
# First.pm
package First;

use strict;
use warnings;

use Second;

use Exporter;
our @EXPORT_OK = qw(first_method);

sub first_method {
    print "Inside first_method\n";
}
#===================================================
# Second.pm
package Second;

use strict;
use warnings;

use First qw(first_method);

sub second_method {
    print "Inside second_method\n";
    first_method();
}
#===================================================