[MacPorts] #50678: makeicns does not build on Snow Leopard with libc++

[MacPorts]

#50678: makeicns does not build on Snow Leopard with libc++
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  Reporter:  steven.dwyer@…  |      Owner:  mk@…
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.3.4
Resolution:                  |   Keywords:  snowleopard
      Port:  makeicns        |
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Comment (by mojca@…):

 Ah, OK. It seems that SDK is used by default and you can only override it.
 (With an empty variable in this case which achieves the goal I wanted to
 achieve in a different way from what I envisioned.)

 So a backup solution (if most people happen to be against patching the
 SDK) would be to avoid ever using SDK in MacPorts, at least in 10.6.

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Ticket URL: <https://trac.macports.org/ticket/50678#comment:16>
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