[MacPorts] #62480: py-numpy: Compiler clang37 not available for Darwin20 arm

[MacPorts]

#62480: py-numpy: Compiler clang37 not available for Darwin20 arm
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  Reporter:  ryandesign  |      Owner:  michaelld
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.6.4
Resolution:              |   Keywords:  arm64
      Port:  py-numpy    |
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Comment (by cjones051073):

 Thinking about it, the only way I see to do this is to remove from ports
 like this the explicit requesting of a compiler variant, and instead only
 list those they don't want. Then the PG can figure out for itself what the
 remaining set of compilers are for a given platform.

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Ticket URL: <https://trac.macports.org/ticket/62480#comment:6>
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