[MacPorts] #65247: OpenVPN3 build fails on older OS versions

[MacPorts]

#65247: OpenVPN3 build fails on older OS versions
----------------------------+------------------------
  Reporter:  iAmInActions   |      Owner:  i0ntempest
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.7.2
Resolution:                 |   Keywords:
      Port:  openvpn3 asio  |
----------------------------+------------------------

Comment (by i0ntempest):

 I've opened an issue [https://github.com/OpenVPN/openvpn3/issues/185]
 about another build error on old macOS in openvpn3 repo, and upstream is
 unwilling to support macOS versions that are this old. This one is
 probably similar.

-- 
Ticket URL: <https://trac.macports.org/ticket/65247#comment:5>
MacPorts <https://www.macports.org/>
Ports system for macOS