[MacPorts] #61444: lemon 1.39_2: implicit declaration of 'access' invalid

[MacPorts]

#61444: lemon 1.39_2: implicit declaration of 'access' invalid
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 Reporter:  MaddTheSane  |      Owner:  (none)
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.6.99
 Keywords:               |       Port:  lemon
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 Recent changes in what Clang marks as errors has resulted in lemon now
 failing to build. This is specifically with the `access` function.
 `access` is defined in `<unistd.h>`, so a simple patch including that
 header should be easy to do.

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Ticket URL: <https://trac.macports.org/ticket/61444>
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