[MacPorts] #69158: htop does not build on 10.7 Lion missing _mach_port_t.h

[MacPorts]

#69158: htop does not build on 10.7 Lion missing _mach_port_t.h
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  Reporter:  rmottola  |      Owner:  neverpanic
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  Lion
      Port:  htop      |
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Comment (by neverpanic):

 Thanks for the report. I support the last three major versions of macOS,
 and Lion isn't among those. I will happily accept a pull request that
 fixes this conditionally on affected operating systems, though. Do you
 think you can open one?

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Ticket URL: <https://trac.macports.org/ticket/69158#comment:3>
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