[MacPorts] #61555: clang-10: 10.0.1_3 build fails on sanitizer_platform_limits_posix.cpp

[MacPorts]

#61555: clang-10: 10.0.1_3 build fails on sanitizer_platform_limits_posix.cpp
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  Reporter:  blair     |      Owner:  kencu
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  clang-10  |
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Comment (by cjones051073):

 One possibility is to change the condition to check on xcode version
 instead if darwin version.

 But, yeah, the forced arches are anyway what should be picked
 automatically so forcing them on Darwin 19 as well is probably fine too.

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Ticket URL: <https://trac.macports.org/ticket/61555#comment:9>
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