[MacPorts] #63597: graphviz-gui @2.49.1_0.darwin_15.x86_64: unknown type name 'NSToolbarItemIdentifier'

[MacPorts]

#63597: graphviz-gui @2.49.1_0.darwin_15.x86_64: unknown type name
'NSToolbarItemIdentifier'
---------------------------+---------------------------------
  Reporter:  thetrial      |      Owner:  mascguy
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:  elcapitan legacy-os
      Port:  graphviz-gui  |
---------------------------+---------------------------------

Comment (by mascguy):

 Interestingly enough, `graphviz-gui` is only failing to build on one of
 our buildbots - macOS 10.11:

 https://ports.macports.org/port/graphviz-gui/details/

 With the details here, though it looks like it's the same issue:

 https://build.macports.org/builders/ports-10.11_x86_64-builder/builds/155777/steps
 /install-port/logs/stdio

 Ryan/anyone, thoughts as to what the "right" fix for this should be...?

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Ticket URL: <https://trac.macports.org/ticket/63597#comment:5>
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