[MacPorts] #60121: git-lfs @2.10.0 build cannot find <sys/clonefile.h> on macOS 10.11

[MacPorts]

#60121: git-lfs @2.10.0 build cannot find <sys/clonefile.h> on macOS 10.11
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  Reporter:  snowflake  |      Owner:  raimue
      Type:  defect     |     Status:  closed
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.6.99
Resolution:  fixed      |   Keywords:  legacy-os
      Port:  git-lfs    |
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Comment (by Wowfunhappy):

 Even if it's non-optimal, could `CGO_ENABLED=0` be conditionally set for
 operating systems < macOS 10.11? Since the alternative is it breaks
 completely.

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Ticket URL: <https://trac.macports.org/ticket/60121#comment:7>
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