[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 EJFielding):

 >For the time being, it seems to me that a good (albeit temporary) fix
 would be to deactivate AVX512 in openblas to ensure compilation, but let
 it in the *-devel port where there is active development on that matter.

 Yes, I would be happy if the main OpenBLAS port would deactivate the use
 of the AVX512 enhanced performance option so that people like me can get a
 working version on the iMac Pro, even if it is somewhat slower. I agree
 that this may be more a problem in the gfortran compiler than in the
 OpenBLAS code.

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Ticket URL: <https://trac.macports.org/ticket/57912#comment:21>
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