[MacPorts] #55072: py27-matplotlib doesn't build on macOS 10.13 (High Sierra)

[MacPorts]

#55072: py27-matplotlib doesn't build on macOS 10.13 (High Sierra)
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  Reporter:  GeneralDuke9   |      Owner:  seanfarley
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.4.2
Resolution:                 |   Keywords:  highsierra
      Port:  py-matplotlib  |
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Comment (by ryandesign):

 The log shows you have clang 800.0.42.1, which is from Xcode 8.2.1. For
 High Sierra, you need Xcode 9 or later, and the corresponding version of
 the command line tools.

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Ticket URL: <https://trac.macports.org/ticket/55072#comment:2>
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