Any ideas how to fix?

g++ -O2 -pthread -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter -g -DBOOST_SPIRIT_THREADSAFE -D_FILE_OFFSET_BITS=64 -I/home/slicify/coin/ProtoShares-psforkinit/src -I/home/slicify/coin/ProtoShares-psforkinit/src/obj -DUSE_UPNP=0 -DUSE_IPV6=1 -I/home/slicify/coin/ProtoShares-psforkinit/src/leveldb/include -I/home/slicify/coin/ProtoShares-psforkinit/src/leveldb/helpers -DHAVE_BUILD_INFO -fno-stack-protector -fstack-protector-all -Wstack-protector -D_FORTIFY_SOURCE=2  -o bitcoind leveldb/libleveldb.a obj/alert.o obj/version.o obj/checkpoints.o obj/netbase.o obj/addrman.o obj/crypter.o obj/key.o obj/db.o obj/init.o obj/keystore.o obj/main.o obj/net.o obj/protocol.o obj/bitcoinrpc.o obj/rpcdump.o obj/rpcnet.o obj/rpcmining.o obj/rpcwallet.o obj/rpcblockchain.o obj/rpcrawtransaction.o obj/script.o obj/sync.o obj/util.o obj/wallet.o obj/walletdb.o obj/hash.o obj/bloom.o obj/noui.o obj/leveldb.o obj/txdb.o -Wl,-z,relro -Wl,-z,now   -Wl,-Bdynamic -l boost_system -l boost_filesystem -l boost_program_optons -l boost_thread -l db_cxx -l ssl -l crypto -l miniupnpc -Wl,-Bdynamic -l z -l dl -l pthread /home/slicify/coin/ProtoShares-psforkinit/src/leveldb/libleveldb.a /home/slicify/coin/ProtoShares-psforkinit/src/leveldb/libmemenv.a

obj/main.o: In function `CBlockHeader::GetHash() const':
/home/slicify/coin/ProtoShares-psforkinit/src/main.cpp:1335: undefined reference to `bts::momentum_verify(uint256, unsigned int, unsigned int)'

obj/main.o: In function `CBlockHeader::CalculateBestBirthdayHash(int&)':
/home/slicify/coin/ProtoShares-psforkinit/src/main.cpp:1345: undefined reference to `bts::momentum_search(uint256)'

collect2: ld returned 1 exit status
make: *** [bitcoind] Error 1

thanks
Steve