[MacPorts] #68185: rust: source build fails when running under rosetta 2

[MacPorts]

#68185: rust: source build fails when running under rosetta 2
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  Reporter:  lukaso  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  rust    |
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Comment (by lukaso):

 If we want to work around this, this command will detect (return 1) if
 running under rosetta 2: `sysctl -n sysctl.proc_translated`.

 I'm not sure how to do an if based on running a command in a Portfile or
 I'd give it a go.

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Ticket URL: <https://trac.macports.org/ticket/68185#comment:2>
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