[MacPorts] #66477: mpich-default +native: clang: error: the clang compiler does not support '-march=native'

[MacPorts]

#66477: mpich-default +native: clang: error: the clang compiler does not support
'-march=native'
----------------------------+----------------------
  Reporter:  chaochinyang   |      Owner:  eborisch
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.8.0
Resolution:                 |   Keywords:  arm64
      Port:  mpich-default  |
----------------------------+----------------------

Comment (by kencu):

 I tried adding some simple compiler blacklisting into the native variant
 for arm builds, but it doesn't seem to work as expected for me. These
 mpich ports are quite detailed in their construction and they may not obey
 standard blacklisting statements, perhaps.

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Ticket URL: <https://trac.macports.org/ticket/66477#comment:9>
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