[MacPorts] #64260: icu fails to configure for ppc64

[MacPorts]

#64260: icu fails to configure for ppc64
---------------------------+-------------------------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:  PowerPC, Leopard, ppc64
      Port:  icu           |
---------------------------+-------------------------------------

Comment (by kencu):

 perhaps try building a simple "hello.c" and "hello.cxx" program with gcc7
 as ppc64, and if they can be compiled, run them both to see if they work
 at all.

 Uncharted territory. gcc7 could be totally broken building 64bit ppc
 code...

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Ticket URL: <https://trac.macports.org/ticket/64260#comment:4>
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