[MacPorts] #57814: installing grep aborts with error code 71

[MacPorts]

#57814: installing grep aborts with error code 71
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  Reporter:  lemzwerg  |      Owner:  Schamschula
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  grep      |
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Comment (by raimue):

 MacPorts overrides the `PATH` completely for compilation phases. The
 problem was probably introduced when configuring this custom MacPorts
 installation. Also check `binpath` in
 `${prefix}/etc/macports/macports.conf`.

 Note the guide also covers this:
 https://guide.macports.org/#installing.macports.source.multiple

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Ticket URL: <https://trac.macports.org/ticket/57814#comment:4>
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