perl -MO=Xref script.pl 2>errs 1>output

##</code><code>##

$ head UNIVERSAL.pm

package UNIVERSAL;

# UNIVERSAL should not contain any extra subs/methods beyond those
# that it exists to define. The use of Exporter below is a historical
# accident that should be fixed sometime.
require Exporter;
*import = \&Exporter::import;
@EXPORT_OK = qw(isa can);

1;


$ perl -MO=Xref UNIVERSAL.pm

File UNIVERSAL.pm
  Subroutine (definitions)
    Package UNIVERSAL
      &VERSION          s0
      &can              s0
      &isa              s0
    Package attributes
      &bootstrap        s0
  Subroutine (main)
    Package Exporter
      &import           7
    Package UNIVERSAL
      *import           7
      @EXPORT_OK        8
UNIVERSAL.pm syntax OK
$