[MacPorts] #42558: gnome-settings-daemon fails to build with gtk3 +quartz -x11

[MacPorts]

#42558: gnome-settings-daemon fails to build with gtk3 +quartz -x11
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  Reporter:  neverpanic             |      Owner:  dbevans
      Type:  defect                 |     Status:  new
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:  2.2.1
Resolution:                         |   Keywords:
      Port:  gnome-settings-daemon  |
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Comment (by cooljeanius):

 > gnome-settings-daemon should at least use the active_variants PortGroup
 to require gtk3 +x11 – I suppose you might also want to report this
 upstream.

 So, the port does in fact now do an active variants check, but this is
 still less than satisfactory; a preferable solution would be able to get
 it to actually work with the quartz backend, as per #60511

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Ticket URL: <https://trac.macports.org/ticket/42558#comment:2>
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