[MacPorts] #52200: qt5 fails to build with Xcode 8 (due to removal of the deprecated xcrun executable)

[MacPorts]

#52200: qt5 fails to build with Xcode 8 (due to removal of the deprecated xcrun
executable)
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  Reporter:  howarth.at.macports@…            |      Owner:  mcalhoun@…
      Type:  defect                           |     Status:  new
  Priority:  Normal                           |  Milestone:
 Component:  ports                            |    Version:  2.3.4
Resolution:                                   |   Keywords:  sierra
      Port:  qt5 qt5-qtbase qt5-mysql-plugin  |
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Comment (by rjvbertin@…):

 Yes, that's the exact problem. xcrun doesn't always look on the PATH, it
 uses its own path for toolchain elements. You'll probably find that it
 returns something like

 {{{
 > xcrun -find clang
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
 }}}

 even though your shell will find clang as `/usr/bin/clang` .

 Incidentally this is also why it's quite tricky to build Qt with a
 different compiler (ditto for Qt dependents that use QMake).

-- 
Ticket URL: <https://trac.macports.org/ticket/52200#comment:23>
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