[MacPorts] #56366: protobuf3-cpp fails to compile on OSX 10.8

[MacPorts]

#56366: protobuf3-cpp fails to compile on OSX 10.8
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  Reporter:  letaage        |      Owner:  blair@…
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.4.2
Resolution:                 |   Keywords:  mountainlion legacy-os
      Port:  protobuf3-cpp  |
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Changes (by letaage):

 * Attachment "main_3.log" added.

 Log file compiling with clang-5.0 installed, port clean --all
 protobuf3-cpp run first

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Ticket URL: <https://trac.macports.org/ticket/56366>
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