[MacPorts] #60168: gtk3 @gtk3-3.24.14_1+quartz.darwin_18: Does not build

[MacPorts]

#60168: gtk3 @gtk3-3.24.14_1+quartz.darwin_18: Does not build
----------------------+----------------------
  Reporter:  Bachsau  |      Owner:  dbevans
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  gtk3     |
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Comment (by maehne):

 I finally found the real cause: It is a typo in {{{gdkquartz-gtk-
 only.h}}}! That header includes {{{Appkit/Appkit.h}}} instead of
 {{{AppKit/AppKit.h}}}. This doesn't matter if macOS / MacPorts is
 installed on a case-insensitive file system, but causes the failure on the
 case-sensitive file system. Patching the typo in the header fixes the
 problem. I will submit a PR.

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Ticket URL: <https://trac.macports.org/ticket/60168#comment:6>
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