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<p class=""><span class="">Hi,</span></p><p class=""><span class=""><br></span></p><p class=""><span class="">When I build ejabberd-16.04 on Mac-OSX, I get below warnings.</span></p><p class="">How can I fix these warnings?</p><p class=""><span class="">Best Regards,</span></p><p class=""><span class="">----------------------</span></p><p class=""><span class="">src/mod_vcard_xupdate.erl:10: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_vcard_xupdate.erl</span></p>
<p class=""><span class="">src/mod_vcard.erl:33: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_vcard.erl</span></p>
<p class=""><span class="">src/mod_shared_roster.erl:30: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_shared_roster.erl</span></p>
<p class=""><span class="">src/mod_roster.erl:42: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_roster.erl</span></p>
<p class=""><span class="">src/mod_private.erl:32: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_private.erl</span></p>
<p class=""><span class="">src/mod_privacy.erl:32: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_privacy.erl</span></p>
<p class=""><span class="">src/mod_offline.erl:39: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_offline.erl</span></p>
<p class=""><span class="">src/mod_muc.erl:34: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_muc.erl</span></p>
<p class=""><span class="">src/mod_mam.erl:31: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_mam.erl</span></p>
<p class=""><span class="">src/mod_last.erl:34: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_last.erl</span></p>
<p class=""><span class="">src/mod_irc.erl:32: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_irc.erl</span></p>
<p class=""><span class="">src/mod_carboncopy.erl:32: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_carboncopy.erl</span></p>
<p class=""><span class="">src/mod_caps.erl:36: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_caps.erl</span></p>
<p class=""><span class="">src/mod_blocking.erl:28: Warning: behaviour gen_mod undefined</span></p>
<p class=""><span class="">Compiled src/mod_blocking.erl</span></p>
<p class=""><span class="">src/mod_announce.erl:32: Warning: behaviour gen_mod undefined</span></p></div>