[MacPorts] #63240: ispc @1.16.0_0: error: Unsupported architecture

[MacPorts]

#63240: ispc @1.16.0_0: error: Unsupported architecture
---------------------------+----------------------
  Reporter:  chrstphrchvz  |      Owner:  mascguy
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:
      Port:  ispc          |
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Comment (by chrstphrchvz):

 Be aware of development upstream: https://github.com/ispc/ispc/pull/2120
 attempted to follow through on this issue, but I believed the approach
 used will still fail on MacPorts build bots; I believe it was because
 `xcrun --sdk … --show-sdk-version` reportedly did not work when full Xcode
 is present. I’m not sure if it would help for CMakeLists.txt to be more
 consistent in getting the SDK path and version either using `xcodebuild`
 or `xcrun` and not both, i.e not using the output of one as an argument of
 the other: so in each step, try `xcodebuild` first, and then try `xcrun`
 if it fails (i.e. because full Xcode isn’t installed).

 Unless someone knows a good approach for retrieving `Version` from
 SDKSettings.plist, ideally without parsing XML or binary plist from CMake.

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Ticket URL: <https://trac.macports.org/ticket/63240#comment:4>
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