[MacPorts] #66615: expat-2.5.0: Configuration logfiles contain indications of -Wimplicit-function-declaration

[MacPorts]

#66615: expat-2.5.0: Configuration logfiles contain indications of -Wimplicit-
function-declaration
---------------------+------------------------
  Reporter:  d-lamb  |      Owner:  ryandesign
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.8.0
Resolution:          |   Keywords:
      Port:  expat   |
---------------------+------------------------

Comment (by ryandesign):

 From what I can tell, `getrandom` is a glibc function. macOS doesn't use
 glibc and doesn't have this function, so this function should be added to
 the global exclusion lists. It's not specific to expat or any other port.

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Ticket URL: <https://trac.macports.org/ticket/66615#comment:2>
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