[MacPorts] #52258: cmake upgrade to 3.6.2_0 fails

[MacPorts]

#52258: cmake upgrade to 3.6.2_0 fails
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  Reporter:  dersh@…  |      Owner:  macports-tickets@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.3.4
Resolution:           |   Keywords:
      Port:  cmake    |
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Comment (by michaelld@…):

 Hmm ... as an update? I don't see it, and I do the beta program. Ah; OK;
 you get it via direct download. Hmmm ... I'm worried about installing it.
 I'd advise you to revert back to Xcode 7 if you can. And/or wait for 10.12
 & upgrade to it.

 The basic issue is that we need to set the SDK properly by the host OS. In
 your case here, the build is trying to use the 10.12 SDK while you're
 running on 10.11. That's asking for problems. I'm not sure what the
 correct solution is off the top of my head.

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Ticket URL: <https://trac.macports.org/ticket/52258#comment:8>
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