[MacPorts] #64212: ffmpeg @4.4.1_1+gpl2: ERROR: zvbi-0.2 not found using pkg-config

[MacPorts]

#64212: ffmpeg @4.4.1_1+gpl2: ERROR: zvbi-0.2 not found using pkg-config
-------------------------+---------------------
  Reporter:  evanmiller  |      Owner:  mascguy
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:  fixed       |   Keywords:
      Port:  ffmpeg      |
-------------------------+---------------------

Comment (by mouse07410):

 And it is good - some some applications (including Rust and Haskell)
 require system libiconv, so modifying system-wide rpath search works screw
 those up for sure.

 I say - remove rpath from zvbi.

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Ticket URL: <https://trac.macports.org/ticket/64212#comment:13>
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