[MacPorts] #42188: Dependency error in ffmpeg 2.1.3_1 on libogg 1.3.1_0

[MacPorts]

#42188: Dependency error in ffmpeg 2.1.3_1 on libogg 1.3.1_0
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  Reporter:  me@…     |      Owner:  devans@…
      Type:  defect   |     Status:  closed
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.2.1
Resolution:  invalid  |   Keywords:
      Port:  ffmpeg   |
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Comment (by me@…):

 I'm not sure this should be closed yet; ffmpeg is still misreporting the
 error, saying it's loading a different file than it's actually loading,
 and not using the fallback.

 Do you have a link describing the behavior of DYLD_LIBRARY_PATH?  From
 what you say it sounds like the "right way" is to never define it at all.
 Does `install_name_tool` work for all executables or just for macports
 executables?  Unsetting DYLD_LIBRARY_PATH and DYLD_OVERRIDE_LIBRARY_PATH
 does resolve the error.  I didn't set them by hand based on some advice,
 it was done automatically either by the Tracker installer or an installer
 for a dependency.  If the variable acts as an override, why isn't it
 DYLD_OVERRIDE_LIBRARY_PATH?

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Ticket URL: <https://trac.macports.org/ticket/42188#comment:6>
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