[MacPorts] #65247: OpenVPN3 build fails on older OS versions: require_free.hpp:59:14: error: expected expression

[MacPorts]

#65247: OpenVPN3 build fails on older OS versions: require_free.hpp:59:14: error:
expected expression
----------------------------+----------------------
  Reporter:  iAmInActions   |      Owner:  mascguy
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.7.2
Resolution:                 |   Keywords:
      Port:  openvpn3 asio  |
----------------------------+----------------------

Comment (by ryandesign):

 Oops, has duplicate #68833.

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Ticket URL: <https://trac.macports.org/ticket/65247#comment:10>
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