не линкуется winsock

\Documents\work\nbd\nbdsrvr.cpp||In function 'int main(int, char**)':|
\Documents\work\nbd\nbdsrvr.cpp|446|warning: unused variable 'th'|
obj\Debug\nbdsrvr.o||In function `Z4READjPhi':|
\Documents\work\nbd\nbdsrvr.cpp|72|undefined reference to `recv@16'|
\Documents\work\nbd\nbdsrvr.cpp|77|undefined reference to `WSAGetLastError@0'|
obj\Debug\nbdsrvr.o||In function `Z5WRITEjPhi':|
\Documents\work\nbd\nbdsrvr.cpp|94|undefined reference to `send@16'|
\Documents\work\nbd\nbdsrvr.cpp|99|undefined reference to `WSAGetLastError@0'|
obj\Debug\nbdsrvr.o||In function `Z5draadPv@4':|
\Documents\work\nbd\nbdsrvr.cpp|292|undefined reference to `recv@16'|
\Documents\work\nbd\nbdsrvr.cpp|382|undefined reference to `closesocket@4'|
obj\Debug\nbdsrvr.o||In function `main':|
\Documents\work\nbd\nbdsrvr.cpp|408|undefined reference to `WSAStartup@8'|
\Documents\work\nbd\nbdsrvr.cpp|411|undefined reference to `socket@12'|
\Documents\work\nbd\nbdsrvr.cpp|421|undefined reference to `htonl@4'|
\Documents\work\nbd\nbdsrvr.cpp|422|undefined reference to `htons@4'|
\Documents\work\nbd\nbdsrvr.cpp|423|undefined reference to `bind@12'|
\Documents\work\nbd\nbdsrvr.cpp|427|undefined reference to `listen@8'|
\Documents\work\nbd\nbdsrvr.cpp|439|undefined reference to `accept@12'|
\Documents\work\nbd\nbdsrvr.cpp|443|undefined reference to `inet_ntoa@4'|
||=== Build finished: 14 errors, 17 warnings ===|