[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         |
------------------------+--------------------
Description changed by asvitkine:

Old description:

> ```
> /opt/local/bin/gm4 --version
> dyld[95941]: Symbol not found: _libiconv
>   Referenced from: <7341635B-6C89-384C-9308-A9DA7C3756D9>
> /opt/local/bin/gm4
>   Expected in:     <757EA503-9506-39CF-8357-A2F99AB99DC7>
> /usr/lib/libiconv.2.dylib
> Abort trap: 6
> ```

New description:

 /opt/local/bin/gm4 --version
 dyld[95941]: Symbol not found: _libiconv
   Referenced from: <7341635B-6C89-384C-9308-A9DA7C3756D9>
 /opt/local/bin/gm4
   Expected in:     <757EA503-9506-39CF-8357-A2F99AB99DC7>
 /usr/lib/libiconv.2.dylib
 Abort trap: 6

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Ticket URL: <https://trac.macports.org/ticket/69690#comment:1>
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