[MacPorts] #57612: clang does not respect -syslibroot when linking

[MacPorts]

#57612: clang does not respect -syslibroot when linking
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  Reporter:  kencu   |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:          |
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Comment (by jeremyhu):

 > A copy of the MacOSX10.13.sdk is installed in the proper place in Xcode:
 >
 > $ ls -la
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/

 That will invalidate your Xcode.app bundle signature, meaning that updates
 from the store will download the update, fail to apply, then download the
 full app.

 I suggest you place the 10.13 SDK at /Library/Developer/SDKs

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Ticket URL: <https://trac.macports.org/ticket/57612#comment:17>
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