[MacPorts] #52326: gmp @6.1.1: error: C++ compiler not available, see config.log for details

[MacPorts]

#52326: gmp @6.1.1: error: C++ compiler not available, see config.log for details
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  Reporter:  alexmartin715@…  |      Owner:  mcalhoun@…
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.3.4
Resolution:                   |   Keywords:  sierra
      Port:  gmp              |
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Comment (by a.j.martin@…):

 Thanks, for the reply it could quite well be something on my machine. I
 have reinstalled Xcode and it is version 8. I did the command to install
 command line tools also and it says already installed, for updates go
 through the App Store and there are none available.

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Ticket URL: <https://trac.macports.org/ticket/52326#comment:2>
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