[MacPorts] #61525: py38-scikit-learn fails to build on macOS 11 Big Sur

[MacPorts]

#61525: py38-scikit-learn fails to build on macOS 11 Big Sur
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  Reporter:  smeingast        |      Owner:  stromnov
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.6.4
Resolution:                   |   Keywords:
      Port:  py-scikit-learn  |
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Comment (by cjones051073):

 Another options is to patch the macports clang 9.0 and 10 compilers to
 understand 11.0 as a deployment target. I am not sure if this is just a
 matter of adjusting some logic to handle 11.x as well as 10.x, or more
 involved. Ken, thoughts ?

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Ticket URL: <https://trac.macports.org/ticket/61525#comment:4>
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