[MacPorts] #54518: gtk3 @3.22.17_0 +quartz+universal: fails to build on Yosemite (10.10.5)

[MacPorts]

#54518: gtk3 @3.22.17_0 +quartz+universal: fails to build on Yosemite (10.10.5)
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  Reporter:  mopihopi  |      Owner:  dbevans
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  gtk3      |
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Comment (by jjstickel):

 I experienced the same error. I am also on Yosemite with Xcode 7.2.1, and
 using +quartz (but not universal).

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Ticket URL: <https://trac.macports.org/ticket/54518#comment:3>
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