Reason: they are extern by default.
Same-binary check passes:
$ ../bitcoin-maintainer-tools/build-for-compare.py e56cf67e6b3f2e87bee42aaa5ab709f479c9e6ca 446a8f9c90400518bbd4f52f82520c9a97b3a7b3
[...]
>>> [do_build] Copying object files...
>>> [do_build] Performing basic analysis pass...
>>> [do_build] Use these commands to compare results:
>>> [do_build] $ sha256sum /tmp/compare/*.stripped
>>> [do_build] $ git diff -W --word-diff /tmp/compare/e56cf67e6b3f2e87bee42aaa5ab709f479c9e6ca /tmp/compare/446a8f9c90400518bbd4f52f82520c9a97b3a7b3
$ sha256sum /tmp/compare/*.stripped
a5d4480faae4cdfb482ea70d91a19450b7da3f3134a9e477bfc1cab86c29ca8f /tmp/compare/bitcoind.446a8f9c90400518bbd4f52f82520c9a97b3a7b3.stripped
a5d4480faae4cdfb482ea70d91a19450b7da3f3134a9e477bfc1cab86c29ca8f /tmp/compare/bitcoind.e56cf67e6b3f2e87bee42aaa5ab709f479c9e6ca.stripped
$ git diff -W --word-diff /tmp/compare/e56cf67e6b3f2e87bee42aaa5ab709f479c9e6ca /tmp/compare/446a8f9c90400518bbd4f52f82520c9a97b3a7b3
$