[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:  ryandesign
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:  elcapitan legacy-os
      Port:  graphviz-gui  |
---------------------------+---------------------------------

Comment (by evanmiller):

 {{{NSToolbarItemIdentifier}}} is an {{{NSString}}} typedef that was
 introduced in 10.13:
 https://developer.apple.com/documentation/appkit/nstoolbaritemidentifier?language=objc

 There shouldn't be any problem deploying to 10.11, but right now it looks
 like the code base is assuming a 10.13+ SDK.

 The error in question originates from this change:

 https://gitlab.com/graphviz/graphviz/-/commit/544035e049fb38ab4243c5ae225aa48f2ab3b4ac

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Ticket URL: <https://trac.macports.org/ticket/63597#comment:1>
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