[MacPorts] #64264: glib2 fails for PowerPC (ppc, ppc64 and universal)

[MacPorts]

#64264: glib2 fails for PowerPC (ppc, ppc64 and universal)
---------------------------+-------------------------------------
  Reporter:  barracuda156  |      Owner:  ryandesign
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:  PowerPC, Leopard, ppc64
      Port:  glib2         |
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Comment (by barracuda156):

 Replying to [comment:13 ryandesign]:
 > and we need to focus on getting icu to build universal first.

 Is there a way to specify an external compiler to build icu? I have gcc10
 now that can build ppc64 binaries, but outside Macports.
 Alternatively, if there is a way to set external compiler globally for
 Macports, I could do that temporarily to build ports that require newer
 gcc (so do not build as universal).

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Ticket URL: <https://trac.macports.org/ticket/64264#comment:15>
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