gettext-runtime, py-pip, others broken on macOS 12.3: Symbol not found: _libiconv

[essandess (Steve Smith)]

pip-3.9 install -I --user setuptools

dyld[72966]: Symbol not found: _libiconv
  Referenced from: /opt/local/lib/libintl.8.dylib
  Expected in: /usr/lib/libiconv.2.dylib

port provides /opt/local/lib/libintl.8.dylib
/opt/local/lib/libintl.8.dylib is provided by: gettext-runtime

[ryandesign (Ryan Carsten Schmidt)]

/opt/local/lib/libintl.8.dylib should not be using /usr/lib/libiconv.2.dylib. It should be using /opt/local/lib/libiconv.2.dylib. Verify with otool -L:

$ otool -L /opt/local/lib/libintl.8.dylib
/opt/local/lib/libintl.8.dylib:
	/opt/local/lib/libintl.8.dylib (compatibility version 11.0.0, current version 11.0.0)
	/opt/local/lib/libiconv.2.dylib (compatibility version 9.0.0, current version 9.1.0)
	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1675.129.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1281.100.1)

If your output looks like mine, then the correct functioning of the library is being subverted by you (or whatever you're running when this happens) setting DYLD_LIBRARY_PATH improperly.

If your output shows /opt/local/lib/libintl.8.dylib actually linking with /usr/lib/libiconv.2.dylib, try rebuilding the gettext-runtime runtime port with sudo port -n upgrade --force gettext-runtime.

[essandess (Steve Smith)]

Replying to ryandesign:

If your output looks like mine, then the correct functioning of the library is being subverted by you (or whatever you're running when this happens) setting DYLD_LIBRARY_PATH improperly.

That's it, and thank you for helping me look in the correct place. This is a non-issue and may be closed.