[MacPorts] #41154: openscad: fix build with libc++

[MacPorts]

#41154: openscad: fix build with libc++
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  Reporter:  ecronin@…  |      Owner:  macsforever2000@…
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.2.1
Resolution:             |   Keywords:  mavericks libc++
      Port:  openscad   |
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Comment (by macsforever2000@…):

 Replying to [comment:1 jeremyhu@…]:

 Can you please elaborate how to implement this - ideally in the form of a
 Portfile patch?

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Ticket URL: <https://trac.macports.org/ticket/41154#comment:2>
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