X:\perl>perl -MO=Xref c:\perl\lib\strict.pm
File c:\perl\lib\strict.pm
  Subroutine (definitions)
    Package Internals
      &HvREHASH         s0
      &SvREADONLY       s0
      &SvREFCNT         s0
      &hash_seed        s0
      &hv_clear_placeholders  s0
      &rehash_seed      s0
    Package PerlIO
      &get_layers       s0
    Package Regexp
      &DESTROY          s0
    Package UNIVERSAL
      &VERSION          s0
      &can              s0
      &isa              s0
    Package Win32
      &BuildNumber      s0
      &CopyFile         s0
      &DomainName       s0
      &FormatMessage    s0
      &FsType           s0
      &GetCwd           s0
      &GetFullPathName  s0
      &GetLastError     s0
      &GetLongPathName  s0
      &GetNextAvailDrive  s0
      &GetOSVersion     s0
      &GetShortPathName  s0
      &GetTickCount     s0
      &IsWin95          s0
      &IsWinNT          s0
      &LoginName        s0
      &NodeName         s0
      &SetChildShowWindow  s0
      &SetCwd           s0
      &SetLastError     s0
      &Sleep            s0
      &Spawn            s0
  Subroutine (main)
    Package (lexical)
      $default_bits     i25
      %bitmask          i5
    Package strict
      $VERSION          3
      &bits             &25
c:\perl\lib\strict.pm syntax OK