[MacPorts] #61586: gimp +quartz does not build under Big Sur

[MacPorts]

#61586: gimp +quartz does not build under Big Sur
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  Reporter:  MaurizioLoreti  |      Owner:  (none)
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:
Resolution:                  |   Keywords:
      Port:  gimp            |
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Comment (by MaurizioLoreti):

 OK, I have edited the py27-gobject portfile adding "configure.cflags-
 append -Wno-implicit-function-declaration", changed the checksums and then
 installed successfully py27-gobject.

 Then I have installed gimp +quartz; but, invoking the executable, the GIMP
 icon appears in the dock (with the white dot under), stays there for about
 a minute, then disappears.  Nothing happens and the GIMP window does not
 show.

 I ran sudo port upgrade --force gimp +quartz , and reinstalled gimp
 +quartz from scratch.  Opening the executable triggers the same behavior.

 $ port -v installed gimp2
 The following ports are currently installed:
   gimp2 @2.10.22_0+python27+quartz (active) platform='darwin 20'
 archs='x86_64' date='2020-11-24T09:09:01+0100'

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Ticket URL: <https://trac.macports.org/ticket/61586#comment:6>
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