hyperleveldb compile warnings & error

compile.txt

  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/bloom.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/env_posix.o
../deps/leveldb/leveldb-hyper/util/env_posix.cc: In member function ‘virtual leveldb::Status leveldb::{anonymous}::PosixEnv::CopyFile(const string&, const string&)’:
../deps/leveldb/leveldb-hyper/util/env_posix.cc:570:30: warning: ‘fd2’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/env.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/histogram.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/coding.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/hash.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/logging.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/filter_policy.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/arena.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/cache.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/comparator.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/status.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/options.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/util/crc32c.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/db/c.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/db/log_reader.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/db/repair.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/db/table_cache.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/db/log_writer.o
../deps/leveldb/leveldb-hyper/db/log_writer.cc: In member function ‘leveldb::Status leveldb::log::Writer::AddRecord(const leveldb::Slice&)’:
../deps/leveldb/leveldb-hyper/db/log_writer.cc:50:7: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
../deps/leveldb/leveldb-hyper/db/log_writer.cc:83:5: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/db/dbformat.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/db/write_batch.o
  CXX(target) Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/db/db_impl.o
In file included from ../deps/leveldb/leveldb-hyper/db/db_impl.cc:5:0:
../deps/leveldb/leveldb-hyper/db/db_impl.h: In constructor ‘leveldb::DBImpl::DBImpl(const leveldb::Options&, const string&)’:
../deps/leveldb/leveldb-hyper/db/db_impl.h:180:17: warning: ‘leveldb::DBImpl::bg_fg_cv_’ will be initialized after [-Wreorder]
../deps/leveldb/leveldb-hyper/db/db_impl.h:176:8: warning:   ‘bool leveldb::DBImpl::allow_background_activity_’ [-Wreorder]
../deps/leveldb/leveldb-hyper/db/db_impl.cc:110:1: warning:   when initialized here [-Wreorder]
../deps/leveldb/leveldb-hyper/db/db_impl.cc: In member function ‘leveldb::Status leveldb::DBImpl::DoCompactionWork(leveldb::DBImpl::CompactionState*)’:
../deps/leveldb/leveldb-hyper/db/db_impl.cc:1084:12: warning: unused variable ‘i’ [-Wunused-variable]
../deps/leveldb/leveldb-hyper/db/db_impl.cc: In member function ‘virtual void leveldb::DBImpl::ReleaseReplayIterator(leveldb::ReplayIterator*)’:
../deps/leveldb/leveldb-hyper/db/db_impl.cc:1378:69: error: ‘dynamic_cast’ not permitted with -fno-rtti
../deps/leveldb/leveldb-hyper/db/db_impl.cc: In member function ‘leveldb::Status leveldb::DBImpl::SequenceWriteBegin(leveldb::DBImpl::Writer*, leveldb::WriteBatch*)’:
../deps/leveldb/leveldb-hyper/db/db_impl.cc:1483:8: warning: unused variable ‘allow_delay’ [-Wunused-variable]
make: *** [Release/obj.target/leveldb/deps/leveldb/leveldb-hyper/db/db_impl.o] Error 1