[MacPorts] #69471: gtk2 @2.24.33_3+quartz fails to build: incompatible function pointer types

[MacPorts]

#69471: gtk2 @2.24.33_3+quartz fails to build: incompatible function pointer types
------------------------+----------------------
  Reporter:  DrLex0     |      Owner:  mascguy
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.9.1
Resolution:             |   Keywords:
      Port:  gtk2 gimp  |
------------------------+----------------------

Comment (by DrLex0):

 I have managed to get it to build, by manually editing 2 files inside the
 gtk2/work/gtk+-2.24.33 dir:
 1. I compared what macports tries to build, against the latest gtk2
 source, and dropped the `(GCompareFunc)` in line 1474 of gtk/gtkscale.c
 2. Fixed tests/testmenubars.c: add missing `int` type to `depth`
 parameter, drop superfluous `TRUE` arguments from invocations of this
 function. This file can never have compiled, except maybe with some really
 ancient lenient compiler. No idea why it is now being compiled, the latest
 gtk2 source no longer has this file anyhow, so the proper fix is probably
 to just delete it…

 After this, gimp2 build succeeded. But, gutenprint build failed because of
 this: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=269972
 So, I also manually patched it, and now I have a working GIMP again.

-- 
Ticket URL: <https://trac.macports.org/ticket/69471#comment:5>
MacPorts <https://www.macports.org/>
Ports system for macOS