[MacPorts] #63676: gtk2 @2.24.33_0+quartz: build error on macOS 10.11: use of undeclared identifier 'kCAContentsFormatRGBA8Uint'

[MacPorts]

#63676: gtk2 @2.24.33_0+quartz: build error on macOS 10.11: use of undeclared
identifier 'kCAContentsFormatRGBA8Uint'
---------------------------+-----------------------
  Reporter:  sambthompson  |      Owner:  mascguy
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:  fixed         |   Keywords:  elcapitan
      Port:  gtk2          |
---------------------------+-----------------------

Comment (by mascguy):

 The fix should be available after 2-3 hours. At that point, run a `sudo
 port selfupdate`, followed by `sudo port clean --work --logs gtk2`, and
 then retry the installation.

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Ticket URL: <https://trac.macports.org/ticket/63676#comment:7>
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