[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 barracuda156):

 Replying to [comment:6 jmroot]:
 > The comments in `AssertMacros.h` actually discuss exactly this kind of
 problem, and there is a mechanism to avoid it: simply define
 `__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES` to 0 before the
 header is included. It's not immediately clear where it's being pulled in,
 however—could be in openvpn3, or asio, or somewhere else?

 Passing `-D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES=0` as a
 cppflag fixes the whole issue. Thank you.

-- 
Ticket URL: <https://trac.macports.org/ticket/65247#comment:13>
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