[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 mascguy):

 Replying to [comment:18 jp-hoehmann]:
 > Replying to [comment:16 mascguy]:
 > > Jean-Pierre, are you referring to the issues related to `m4`? Or the
 other build errors?
 >
 > Sorry, I should have specified. I am getting the same build error. I see
 the issue with `m4` as well, but that one shows up only under 15.3.

 Makes sense, thanks for clarifying. And a fix was made for the issue
 you're experiencing.

 Can you re-sync your ports with `sudo port selfupdate`, and then try the
 installation again?

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Ticket URL: <https://trac.macports.org/ticket/69471#comment:19>
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