[MacPorts] #55578: cmake @3.10.1 does not build on PPC Tiger, Mac OS X 10.4.11, because unsetenv() is not handled as void

[MacPorts]

#55578: cmake @3.10.1 does not build on PPC Tiger, Mac OS X 10.4.11, because
unsetenv() is not handled as void
------------------------+-------------------
  Reporter:  ballapete  |      Owner:
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.2
Resolution:             |   Keywords:  tiger
      Port:  cmake      |
------------------------+-------------------
Changes (by ballapete):

 * Attachment "main.log" added.

 main.log from PPC Tiger

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Ticket URL: <https://trac.macports.org/ticket/55578>
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