[MacPorts] #68559: openbabel build fails to set correct C++ standard: C++14 is required due to Eigen

[MacPorts]

#68559: openbabel build fails to set correct C++ standard: C++14 is required due to
Eigen
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  Reporter:  barracuda156  |      Owner:  reneeotten
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:  openbabel     |
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Comment (by barracuda156):

 On a side note, I have opened an issue with `Eigen` re that silly error,
 hopefully they gonna fix it:
 https://gitlab.com/libeigen/eigen/-/issues/2741
 It is really confusing atm.

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Ticket URL: <https://trac.macports.org/ticket/68559#comment:3>
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