compilation fails with Db 6.2

[rbiegel]

db.cpp: In member function ‘void CDBEnv::EnvShutdown()’:
db.cpp:40:16: error: call of overloaded ‘DbEnv(int)’ is ambiguous
         DbEnv(0).remove(path.string().c_str(), 0);
                ^
In file included from db.h:14:0,
                 from db.cpp:6:
/usr/include/db6.2/db_cxx.h:916:2: note: candidate: DbEnv::DbEnv(const DbEnv&)
  DbEnv(const DbEnv &);
  ^
In file included from db.h:14:0,
                 from db.cpp:6:
/usr/include/db6.2/db_cxx.h:518:2: note: candidate: DbEnv::DbEnv(DB_ENV*)
  DbEnv(DB_ENV *dbenv);
  ^
/usr/include/db6.2/db_cxx.h:516:2: note: candidate: DbEnv::DbEnv(u_int32_t)
  DbEnv(u_int32_t flags);
  ^

Fix from bitcoin: bitcoin/bitcoin@323a5fe

[nopslide]

we tried with 4.8

[barrystyle]

works fine with 5.3

[aizensou]

Berkeley DB 6.2 isn't supported.