[MacPorts] #48938: ffmpeg build failure on 10.6

[MacPorts]

#48938: ffmpeg build failure on 10.6
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  Reporter:  chilli.namesake@…  |      Owner:  devans@…
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.3.3
Resolution:                     |   Keywords:  snowleopard
      Port:  ffmpeg             |
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Comment (by ryandesign@…):

 I would strongly suspect that using some version of clang would work
 around these problems, but if we can fix the build with gcc, I'd prefer
 that. I'll look into it on my 10.6 system.

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Ticket URL: <https://trac.macports.org/ticket/48938#comment:8>
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