[MacPorts] #57982: waf portgroup: Support waf 2

[MacPorts]

#57982: waf portgroup: Support waf 2
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  Reporter:  ryandesign  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:              |
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Comment (by kencu):

 This is done in `mpv` as a workaround for now....
 {{{
 # Current waf doesn't support --nocache anymore. Set by PortGroup.
 configure.args-delete   --nocache
 }}}

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Ticket URL: <https://trac.macports.org/ticket/57982#comment:1>
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