[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):

 first thing I would do is build gcc7 in an isolated way outside macports,
 with the default multilib left enabled, and see if it is broken building
 64 bit then.

 If it is, complain to gcc.

 If that one works, then it's a macports issue of some kind...

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Ticket URL: <https://trac.macports.org/ticket/64260#comment:7>
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