[MacPorts] #69690: M4 fails on Ventura due to depending on /usr/lib/libiconv.2.dylib instead of /opt/local version

[MacPorts]

#69690: M4 fails on Ventura due to depending on /usr/lib/libiconv.2.dylib instead
of /opt/local version
------------------------+--------------------
  Reporter:  asvitkine  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  m4         |
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Comment (by asvitkine):

 I'm confused by the dyld error since running otool on the binary doesn't
 show a dependency to the /usr/lib file:

 ```
 $ otool -L /opt/local/bin/gm4
 /opt/local/bin/gm4:
         /opt/local/lib/libiconv.2.dylib (compatibility version 9.0.0,
 current version 9.1.0)
         /opt/local/lib/libintl.8.dylib (compatibility version 11.0.0,
 current version 11.0.0)
 /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
 (compatibility version 150.0.0, current version 1953.1.0)
         /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
 version 1319.0.0)
 ```

-- 
Ticket URL: <https://trac.macports.org/ticket/69690#comment:4>
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