[MacPorts] #55529: py-matplotlib @2.1.1_0 fails building on 10.5.8

[MacPorts]

#55529: py-matplotlib @2.1.1_0 fails building on 10.5.8
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  Reporter:  udbraumann     |      Owner:
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:  powerpc
      Port:  py-matplotlib  |
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Comment (by udbraumann):

 Why not? I think some compiler switch like `-std=c99` should solve the
 issue.

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Ticket URL: <https://trac.macports.org/ticket/55529#comment:2>
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