[MacPorts] #65854: glib2 @2.70.5_0: build fails on 10.5 PPC: pragma GCC diagnostic not allowed inside functions

[MacPorts]

#65854: glib2 @2.70.5_0: build fails on 10.5 PPC: pragma GCC diagnostic not allowed
inside functions
------------------------+-------------------------
  Reporter:  ballapete  |      Owner:  mascguy
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.7.2
Resolution:             |   Keywords:  leopard ppc
      Port:  glib2      |
------------------------+-------------------------

Comment (by ballapete):

 `glib2-upstream` built with Python 3.9 instead of Python 3.10 in less than
 an hour. Over 400 times I was warned again:

 {{{
 ./config.h:370:0: warning: "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4" redefined
 }}}

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Ticket URL: <https://trac.macports.org/ticket/65854#comment:6>
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