[MacPorts] #66577: py311-numpy uses -march=native on PPC, which breaks the build

[MacPorts]

#66577: py311-numpy uses -march=native on PPC, which breaks the build
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  Reporter:  barracuda156  |      Owner:  michaelld
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.0
Resolution:                |   Keywords:  snowleopard, rosetta, powerpc
      Port:  py311-numpy   |
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Comment (by barracuda156):

 Should actually be not too hard to fix. If arch detection is made sane, it
 will likely fix the build.

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Ticket URL: <https://trac.macports.org/ticket/66577#comment:6>
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