[MacPorts] #71515: optool fails to build on 10.6

[MacPorts]

#71515: optool fails to build on 10.6
---------------------------+-----------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.10.5
Resolution:                |   Keywords:  legacy-os
      Port:  optool        |
---------------------------+-----------------------
Changes (by raimue):

 * keywords:   => legacy-os
 * cc: raimue (removed)


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Ticket URL: <https://trac.macports.org/ticket/71515#comment:1>
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