[MacPorts] #66488: lerc fails to build on Mountain Lion

[MacPorts]

#66488: lerc fails to build on Mountain Lion
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  Reporter:  RobK88  |      Owner:  Veence
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.8.0
Resolution:          |   Keywords:
      Port:  lerc    |
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Comment (by jmroot):

 Standard library headers can include other headers internally, so it's
 possible to get a header included without explicitly asking for it. But
 you can't rely on this happening since it's an implementation detail that
 can easily change between stdlib implementations and different versions of
 the same stdlib.

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Ticket URL: <https://trac.macports.org/ticket/66488#comment:5>
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