[MacPorts] #65910: harfbuzz 5.2 won't compile -- syntax error from mmintrin.h?

[MacPorts]

#65910: harfbuzz 5.2 won't compile -- syntax error from mmintrin.h?
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  Reporter:  michael-j-oconnor  |      Owner:  ryandesign
      Type:  defect             |     Status:  assigned
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:
Resolution:                     |   Keywords:
      Port:  harfbuzz           |
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Comment (by michael-j-oconnor):

 I see the same issue with harfbuzz 5.3.1.  See attached logs.

 The big difference between what MacPorts buildbots test with is Xcode 9.4
 vs Xcode 10.1 (latest for 10.13.6).  Any reason not to use the
 latest/lastest Xcode?

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Ticket URL: <https://trac.macports.org/ticket/65910#comment:4>
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