[MacPorts] #55145: gawk @4.2.0 fails to build on PPC Tiger, Mac OS X 10.4.11, because void unsetenv() does not return an integer value for comparison

[MacPorts]

#55145: gawk @4.2.0 fails to build on PPC Tiger, Mac OS X 10.4.11, because void
unsetenv() does not return an integer value for comparison
------------------------+-------------------
  Reporter:  ballapete  |      Owner:
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.2
Resolution:             |   Keywords:  tiger
      Port:  gawk       |
------------------------+-------------------

Comment (by kencu):

 will need a patch for tiger, if there is not already one out there.

 here's how one project handled it
 <https://github.com/krb5/krb5/commit/83ef046b405dfad26538eeccc117e1ab178bdd91>

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Ticket URL: <https://trac.macports.org/ticket/55145#comment:2>
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