[MacPorts] #54504: xorg-server 1.18.4_2: fails to compile on siera

[MacPorts]

#54504: xorg-server 1.18.4_2: fails to compile on siera
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  Reporter:  EdHarry      |      Owner:
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.4.1
Resolution:               |   Keywords:  xorg-server sierra
      Port:  xorg-server  |
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Comment (by EdHarry):

 This update (1.18.4_2) added a build dependency on mp-clang-3.7, which I
 believe was the compiler used for the build. This could be the reason for
 the clash with the current framework?

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Ticket URL: <https://trac.macports.org/ticket/54504#comment:1>
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