[MacPorts] #71453: freecad fails to pass C++14 flags which breaks build with current eigen3

[MacPorts]

#71453: freecad fails to pass C++14 flags which breaks build with current eigen3
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  Reporter:  barracuda156  |      Owner:  mbrethen
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.10.5
Resolution:                |   Keywords:
      Port:  freecad       |
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Comment (by reneeotten):

 part of the issue is likely that {{{eigen3}}} and {{{eigen3-devel}}}
 require a different CXX standard, you're here likely referring to an
 installation against {{{eigen3-devel}}}.
 But the {{{freecad}}} port is about 4 years behind upstream releases, so
 the first thing to do is update the port to the current versions, which is
 1.0.0.

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Ticket URL: <https://trac.macports.org/ticket/71453#comment:1>
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