[MacPorts] #71993: needs bump in compiler version

[MacPorts]

#71993: needs bump in compiler version
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  Reporter:  rmottola                         |      Owner:  mascguy
      Type:  defect                           |     Status:  assigned
  Priority:  Normal                           |  Milestone:
 Component:  ports                            |    Version:
Resolution:                                   |   Keywords:  leopard gcc
      Port:  gtk-osx-application-common-gtk2  |
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Comment (by jmroot):

 Presumably `G_DECLARE_FINAL_TYPE` also expands to a typedef.

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Ticket URL: <https://trac.macports.org/ticket/71993#comment:1>
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