[MacPorts] #57085: glm @0.9.9.0: build fails on 10.8 and earlier

[MacPorts]

#57085: glm @0.9.9.0: build fails on 10.8 and earlier
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  Reporter:  dbevans  |      Owner:  mamoll
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  glm      |
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Changes (by kencu):

 * Attachment "ld-latest_2019-03-22-152716_localhost.crash" added.

 this is the crashlog trying to build glm against macports-libstdc++ with
 clang-5.0 on 10.7.5

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Ticket URL: <https://trac.macports.org/ticket/57085>
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