[MacPorts] #54149: gcc6 fails to compile because "configure: error: cannot compute sizeof (long long)"

[MacPorts]

#54149: gcc6 fails to compile because "configure: error: cannot compute sizeof
(long long)"
---------------------+-----------------
  Reporter:  RJVB    |      Owner:
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  gcc6    |
---------------------+-----------------

Comment (by RJVB):

 False alarm. I don't understand how, but this was somehow caught be an
 oversight in my libc++ patch.

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Ticket URL: <https://trac.macports.org/ticket/54149#comment:1>
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