[MacPorts] #71756: gtk3 @3.24.43_1 does not build on PPC Leopard, Mac OS X 10.5.8, because of ld: library not found for -lgcc_ext.10.5

[MacPorts]

#71756: gtk3 @3.24.43_1  does not build on PPC Leopard, Mac OS X 10.5.8, because of
ld: library not found for -lgcc_ext.10.5
------------------------+-------------------------
  Reporter:  ballapete  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.10.5
Resolution:             |   Keywords:  leopard ppc
      Port:  gtk3       |
------------------------+-------------------------

Comment (by ballapete):

 It seems no source file contains the string "gcc-mp-7". So it must be some
 external tool from MacPorts' past that is performing nonsense.

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Ticket URL: <https://trac.macports.org/ticket/71756#comment:1>
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