[MacPorts] #70665: ngspice-lib fails to build: error: duplicate member 'component'

[MacPorts]

#70665: ngspice-lib fails to build: error: duplicate member 'component'
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  Reporter:  barracuda156          |      Owner:  bpdegnan
      Type:  defect                |     Status:  assigned
  Priority:  Normal                |  Milestone:
 Component:  ports                 |    Version:  2.10.1
Resolution:                        |   Keywords:
      Port:  ngspice, ngspice-lib  |
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Comment (by markemer):

 We don't hardcode arch do we? Or is that in ngspice? I have zero way to
 test this, I haven't had a working PPC machine quite sometime. If you have
 a way to fix it without breaking modern macOS, I'm more than happy to
 merge it.

 We probably should set the required C++ standard no matter what.

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Ticket URL: <https://trac.macports.org/ticket/70665#comment:1>
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