[MacPorts] #57912: OpenBLAS compilation fails on iMac Pro MacOS 10.13

[MacPorts]

#57912: OpenBLAS compilation fails on iMac Pro MacOS 10.13
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  Reporter:  EJFielding  |      Owner:  NicosPavlov
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.5.4
Resolution:              |   Keywords:
      Port:  OpenBLAS    |
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Comment (by NicosPavlov):

 Replying to [comment:18 kencu]:
 > we might need to let openblas run it's tests and enable/disable features
 internally. why do we override that, again?

 As far as I know, we are letting openblas do its test and set features
 most of the time. The thing is that openblas sets features based on the
 CPU architecture, and the capability of the compiler might be different
 from that, hence limiting some features in the Portfile.

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Ticket URL: <https://trac.macports.org/ticket/57912#comment:19>
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