[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):

 Replying to [comment:22 mouse07410]:
 > Clang of Xcode-10.1 does not accept {{{-syslibroot}}} argument at all.
 That's what prevents {{{gimp-print}}} from being built on Mojave:

 Yes, the compiler front end has never supported -syslibroot.  How is that
 getting passed to clang?

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Ticket URL: <https://trac.macports.org/ticket/57612#comment:23>
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