File list of package libdb5.3++-dev in bullseye of architecture amd64
/usr/include/db_cxx.h /usr/lib/x86_64-linux-gnu/libdb_cxx-5.3.a /usr/lib/x86_64-linux-gnu/libdb_cxx.a /usr/lib/x86_64-linux-gnu/libdb_cxx.so /usr/share/doc/libdb5.3++-dev
/usr/include/db_cxx.h /usr/lib/x86_64-linux-gnu/libdb_cxx-5.3.a /usr/lib/x86_64-linux-gnu/libdb_cxx.a /usr/lib/x86_64-linux-gnu/libdb_cxx.so /usr/share/doc/libdb5.3++-dev