[MacPorts] #64836: ghc build error on arm: 'ffitarget_arm64.h' file not found

[MacPorts]

#64836: ghc build error on arm: 'ffitarget_arm64.h' file not found
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  Reporter:  essandess  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  ghc        |
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Comment (by ryandesign):

 Add `-I${configure.sdkroot}/usr/include/ffi` to CPPFLAGS?

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Ticket URL: <https://trac.macports.org/ticket/64836#comment:1>
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