BEGIN {
  use constant ();

  my $have_valid_inodes = 0;

  # We accept DEV:INO as valid if two files in the same directory have the
  #  same DEV and different INO values.  We use two modules from this
  #  library for this test and retrieve their actual locations from %INC.
  my @stat_record = stat $INC{'WARC/Record.pm'};
  my @stat_volume = stat $INC{'WARC/Volume.pm'};

  $have_valid_inodes = 1
    if (scalar @stat_record && scalar @stat_volume # both stat calls worked
	&& $stat_record[0] == $stat_volume[0]	   # both have same DEV
	&& $stat_record[1] != $stat_volume[1]);	   # different INO values

  constant->import(HAVE_VALID_INODES => $have_valid_inodes);
}