[MacPorts] #66246: -stdlib= flag added by compilers PG breaks builds with GCC on PPC

[MacPorts]

#66246: -stdlib= flag added by compilers PG breaks builds with GCC on PPC
---------------------------+----------------------
  Reporter:  barracuda156  |      Owner:  kencu
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.0
Resolution:                |   Keywords:
      Port:                |
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Comment (by cjones051073):

 The principle of setting stdlib correctly with gcc is not the problem. The
 issue is the compilers PG was not taking into account the fact this option
 is not available on PPC.

 https://github.com/macports/macports-
 ports/commit/b82f938ab16e0ca63baa90f3adbb0732fc9dbd20

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Ticket URL: <https://trac.macports.org/ticket/66246#comment:6>
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