[MacPorts] #67352: glib2-upstream compilation failures on 10.5

[MacPorts]

#67352: glib2-upstream compilation failures on 10.5
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  Reporter:  rmottola        |      Owner:  mascguy
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:
Resolution:                  |   Keywords:  leopard
      Port:  glib2-upstream  |
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Comment (by rmottola):

 gcc 7 has the same errors as clang 7

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Ticket URL: <https://trac.macports.org/ticket/67352#comment:1>
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