<p style="white-space: pre-wrap; word-wrap: break-word;">Kevin means, PJSIP_EXPIRES_NOT_SPECIFIED does not exists in PJSIP 2.9 and earlier, for example. When I compile with an external PJProject and that external PJProject is 2.9 or earlier, the build fails. Consequently, this new (un)signed stuff must be detected somehow.</p><p><a href="https://gerrit.asterisk.org/c/asterisk/+/14413">View Change</a></p><ul style="list-style: none; padding: 0;"></ul><p>To view, visit <a href="https://gerrit.asterisk.org/c/asterisk/+/14413">change 14413</a>. To unsubscribe, or for help writing mail filters, visit <a href="https://gerrit.asterisk.org/settings">settings</a>.</p><div itemscope itemtype="http://schema.org/EmailMessage"><div itemscope itemprop="action" itemtype="http://schema.org/ViewAction"><link itemprop="url" href="https://gerrit.asterisk.org/c/asterisk/+/14413"/><meta itemprop="name" content="View Change"/></div></div>

<div style="display:none"> Gerrit-Project: asterisk </div>
<div style="display:none"> Gerrit-Branch: 16 </div>
<div style="display:none"> Gerrit-Change-Id: Iec8821c6cbbc08c369d0e3cd2f14e691b41d0c81 </div>
<div style="display:none"> Gerrit-Change-Number: 14413 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: Kevin Harwell <kharwell@digium.com> </div>
<div style="display:none"> Gerrit-Reviewer: Friendly Automation </div>
<div style="display:none"> Gerrit-Reviewer: Kevin Harwell <kharwell@digium.com> </div>
<div style="display:none"> Gerrit-CC: Alexander Traud <pabstraud@compuserve.com> </div>
<div style="display:none"> Gerrit-CC: George Joseph <gjoseph@digium.com> </div>
<div style="display:none"> Gerrit-Comment-Date: Mon, 18 May 2020 15:30:12 +0000 </div>
<div style="display:none"> Gerrit-HasComments: No </div>
<div style="display:none"> Gerrit-Has-Labels: No </div>
<div style="display:none"> Gerrit-MessageType: comment </div>