[MacPorts] #55687: root6 @6.12.04_1 build fail in High Sierra (XCode 8.3)

[MacPorts]

#55687: root6 @6.12.04_1 build fail in High Sierra (XCode 8.3)
----------------------+--------------------------
  Reporter:  diemort  |      Owner:  cjones051073
      Type:  defect   |     Status:  closed
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.4.2
Resolution:  invalid  |   Keywords:  highsierra
      Port:  root6    |
----------------------+--------------------------

Comment (by cjones051073):

 Replying to [comment:3 ryandesign]:
 > Replying to [comment:2 cjones051073]:
 > > Ignore the reinplace warnings, they are 'normal' ( I have to perform a
 'catch' replacement on all python scripts to make sure they specific the
 python version correctly. Not all need it but giving an explicit list
 would be unmaintainable, given the number and how they change between
 releases, so I run a catch all search. The warning is for those that do
 not need it. )
 >
 > Then use `reinplace`'s `-q` flag to silence the warning.

 Thanks ! Is that a new option ? When I first started getting this warnings
 I asked how to suppress them, and was told at the time it was not
 possible.

 >
 > > Anyway, your issue is your Xcode version is too old for macOS 10.13.
 Please update (to 9.2 as of this time) and try again.
 >
 > Agreed; the log shows clang version 802.0.38, which is from Xcode 8.3;
 macOS High Sierra requires Xcode 9.

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Ticket URL: <https://trac.macports.org/ticket/55687#comment:5>
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