DuckDB failing to link on clang 20/22

CURRENT_TEST: duckdb.space_reclaim

$ /build/sql/mariadbd --defaults-group-suffix=.1 --defaults-file=/build/mysql-test/var/1/my.cnf --log-output=file --plugin-load-add=ha_duckdb.so --duckdb_dml_in_batch=OFF --duckdb_allow_run_in_duckdb=ON --character-set-server=utf8mb4 --character-set-collations=utf8mb4=utf8mb4_uca1400_ai_ci --loose-sequence --loose-duckdb-allow-run-in-duckdb=ON --plugin-maturity=alpha --core-file --loose-debug-sync-timeout=300

2026-07-15  0:14:10 0 [Warning] Could not increase number of max_open_files to more than 1024 (request: 32190)

2026-07-15  0:14:10 0 [Warning] Changed limits: max_open_files: 1024  max_connections: 151 (was 151)  table_cache: 421 (was 2000)

2026-07-15  0:14:10 0 [Note] Starting MariaDB 11.4.13-MariaDB-log source revision  server_uid O+yORB0RQ4p6DqjEivSzVKozjoM= as process 12930

2026-07-15  0:14:10 0 [ERROR] mariadbd: Can't open shared library '/build/mysql-test/var/plugins/ha_duckdb.so' (errno: 2, undefined symbol: _ZNK6duckdb28SimpleNamedParameterFunction8ToStringEv)

2026-07-15  0:14:10 0 [ERROR] Couldn't load plugins from 'ha_duckdb.so'.

2026-07-15  0:14:10 0 [ERROR] mariadbd: Can't open shared library '/build/mysql-test/var/plugins/ha_duckdb.so' (errno: 2, undefined symbol: _ZNK6duckdb28SimpleNamedParameterFunction8ToStringEv)

2026-07-15  0:14:10 0 [ERROR] Couldn't load plugins from 'ha_duckdb.so'.

buildbot@993b000de6e9:/build$ c++filt

_ZNK6duckdb28SimpleNamedParameterFunction8ToStringEv

duckdb::SimpleNamedParameterFunction::ToString() const

 c ^C

buildbot@993b000de6e9:/build$ ldd mysql-test/var/plugins/ha_duckdb.so

	linux-vdso.so.1 (0x00007f7b9f6d3000)

	libc++.so.1 => /msan-libs/libc++.so.1 (0x00007f7b9b70b000)

	libc++abi.so.1 => /msan-libs/libc++abi.so.1 (0x00007f7b9b64a000)

	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f7b9b552000)

	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f7b9b525000)

	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f7b9b32f000)

	/lib64/ld-linux-x86-64.so.2 (0x00007f7b9f6d5000)