[MacPorts] #53187: gr-osmosdr fails to build on OSX 10.7.5

[MacPorts]

#53187: gr-osmosdr fails to build on OSX 10.7.5
-------------------------+-------------------
  Reporter:  nr0q        |      Owner:
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.5
Resolution:              |   Keywords:
      Port:  gr-osmosdr  |
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Comment (by kencu):

 I thought I would boot up a 10.7.5 machine I have (which has been upgraded
 to LibcxxOnOlderSystems) and see what might be going on with this port for
 you, but there is still an active problem with qt4-mac installing on this
 system when using libc++ <https://trac.macports.org/ticket/50481> and at
 the moment, things get stuck at the qt4-mac installation.

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Ticket URL: <https://trac.macports.org/ticket/53187#comment:4>
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