[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):

 Replying to [comment:4 reneeotten]:
 > Replying to [comment:2 barracuda156]:
 > > By the way, I can confirm that once C++ standard is set to 14, no more
 disaster with Eigen.
 >
 > well `eigen3` claims itself to be needing CXX11 so if that's indeed
 correct there should be no need for `openbabel` to require anything else.

 I have quoted `eigen3` header above: the current version does require
 C++14. Possibly, the older one is at C++11.

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Ticket URL: <https://trac.macports.org/ticket/68559#comment:7>
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