anchor.diff:  %%
   %% %CopyrightBegin%
   %%
  -%% Copyright Ericsson AB 1998-2020. All Rights Reserved.
  +%% Copyright Ericsson AB 1998-2021. All Rights Reserved.
   %%
   %% Licensed under the Apache License, Version 2.0 (the "License");
   %% you may not use this file except in compliance with the License.
  
positive.code: %% pktoptions is not supported for IPv4
  recvtos_ok({unix,netbsd}, _OSVer) -> false;
  recvtos_ok({unix,openbsd}, _OSVer) -> false; % not semver_lt(OSVer, {6,9,0});
  recvtos_ok({unix,darwin}, OSVer) -> not semver_lt(OSVer, {19,4,0});
  %% Using the option returns einval, so it is not implemented.
  recvtos_ok({unix,freebsd}, OSVer) -> not semver_lt(OSVer, {12,2,0});
  recvtos_ok({unix,sunos}, OSVer) -> not semver_lt(OSVer, {5,12,0});
  
negative.code: %% pktoptions is not supported for IPv4
  recvttl_ok({unix,netbsd}, _OSVer) -> false;
  recvttl_ok({unix,openbsd}, _OSVer) -> false; % not semver_lt(OSVer, {6,9,0});
  recvttl_ok({unix,darwin}, OSVer) -> false; % not semver_lt(OSVer, {19,6,0});
  %% Using the option returns einval, so it is not implemented.
  recvttl_ok({unix,freebsd}, OSVer) -> not semver_lt(OSVer, {12,2,0});
  recvttl_ok({unix,sunos}, OSVer) -> not semver_lt(OSVer, {5,12,0});
  