namecoin-qt-build_err

g++ -m64 -fstack-protector-all -Wl,-O1 -o namecoin-qt build/auxpow.o build/util.o build/script.o build/db.o build/net.o build/irc.o build/key.o build/keystore.o build/main.o build/wallet.o build/rpc.o build/init.o build/sha.o build/cpu.o build/namecoin.o build/netbase.o build/bitcoin.o build/bitcoingui.o build/transactiontablemodel.o build/addresstablemodel.o build/optionsdialog.o build/sendcoinsdialog.o build/addressbookpage.o build/signverifymessagedialog.o build/aboutdialog.o build/editaddressdialog.o build/bitcoinaddressvalidator.o build/clientmodel.o build/guiutil.o build/transactionrecord.o build/optionsmodel.o build/monitoreddatamapper.o build/transactiondesc.o build/transactiondescdialog.o build/bitcoinstrings.o build/bitcoinamountfield.o build/transactionfilterproxy.o build/transactionview.o build/walletmodel.o build/overviewpage.o build/csvmodelwriter.o build/sendcoinsentry.o build/qvalidatedlineedit.o build/bitcoinunits.o build/qvaluecombobox.o build/askpassphrasedialog.o build/notificator.o build/paymentserver.o build/rpcconsole.o build/moc_bitcoingui.o build/moc_transactiontablemodel.o build/moc_addresstablemodel.o build/moc_optionsdialog.o build/moc_sendcoinsdialog.o build/moc_addressbookpage.o build/moc_signverifymessagedialog.o build/moc_aboutdialog.o build/moc_editaddressdialog.o build/moc_bitcoinaddressvalidator.o build/moc_clientmodel.o build/moc_guiutil.o build/moc_optionsmodel.o build/moc_monitoreddatamapper.o build/moc_transactiondesc.o build/moc_transactiondescdialog.o build/moc_bitcoinamountfield.o build/moc_transactionfilterproxy.o build/moc_transactionview.o build/moc_walletmodel.o build/moc_overviewpage.o build/moc_csvmodelwriter.o build/moc_sendcoinsentry.o build/moc_qvalidatedlineedit.o build/moc_bitcoinunits.o build/moc_qvaluecombobox.o build/moc_askpassphrasedialog.o build/moc_notificator.o build/moc_paymentserver.o build/moc_rpcconsole.o build/qrc_bitcoin.o -L/usr/lib/x86_64-linux-gnu -lrt -lssl -lcrypto -ldb_cxx -lboost_system-mgw46-mt-1_50 -lboost_filesystem-mgw46-mt-1_50 -lboost_program_options-mgw46-mt-1_50 -lboost_thread-mgw46-mt-1_50 -lpthread -lQtGui -lQtNetwork -lQtCore

/usr/bin/ld: cannot find -lboost_system-mgw46-mt-1_50

/usr/bin/ld: cannot find -lboost_filesystem-mgw46-mt-1_50

/usr/bin/ld: cannot find -lboost_program_options-mgw46-mt-1_50

/usr/bin/ld: cannot find -lboost_thread-mgw46-mt-1_50

collect2: ld returned 1 exit status

make: *** [namecoin-qt] Error 1