[MacPorts] #57611: consider adding faccessat (and likely a number of other *at functions) to 10.9 and less

[MacPorts]

#57611: consider adding faccessat (and likely a number of other *at functions) to
10.9 and less
-------------------------+----------------------------
 Reporter:  kencu        |      Owner:  kencu
     Type:  enhancement  |     Status:  assigned
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  legacy-support
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 it appears that most of these functions showed up in macOS 10.10. They are
 POSIX 200809 for the most part, I believe.

 Current software is increasingly using these, most often without
 replacements.

 There are replacements for some of these in gnulib, not always completely
 replicating the functionality.

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Ticket URL: <https://trac.macports.org/ticket/57611>
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