[MacPorts] #58820: stellarium @0.19.1: error: missing default argument on parameter

[MacPorts]

#58820: stellarium @0.19.1: error: missing default argument on parameter
-------------------------+-----------------------
  Reporter:  kencu       |      Owner:  michaelld
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  lion
      Port:  stellarium  |
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Comment (by kencu):

 Given the upcoming changes in MacPorts, I'm not testing against anything
 less than clang-5.0 any longer.

 I'm not sure which MacOS clang version passes the test to build this, ie
 where the clang version line should be drawn. There is nothing about
 `stellarium` on `packages.macports.org` to shed light on this, either, I'm
 afraid.

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Ticket URL: <https://trac.macports.org/ticket/58820#comment:1>
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