qt+mingw编译出错，提示undefined reference to `@*'解决思路

qt+mingw编译出错，提示undefined reference to `**@**'
D:TestBiddingsrc/soap/stdsoap2.cpp:4844: undefined reference to `setsockopt@20'
D:TestBidding

src/soap/stdsoap2.cpp:4845: undefined reference to `WSAGetLastError@0'
D:TestBiddingsrc/soap/stdsoap2.cpp:4854: 

undefined reference to `ioctlsocket@12'
D:TestBiddingsrc/soap/stdsoap2.cpp:4856: undefined reference to 

`ioctlsocket@12'
D:TestBiddingsrc/soap/stdsoap2.cpp:4859: undefined reference to `WSAGetLastError@0'
./objs

stdsoap2.o: In function `soap_cleanup':
D:TestBiddingsrc/soap/stdsoap2.cpp:4923: undefined reference to 

`WSACleanup@0'
./objsstdsoap2.o: In function `soap_send_fault':
D:TestBiddingsrc/soap/stdsoap2.cpp:15320: 

undefined reference to `recv@16'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [binBiddingAssistant.exe] 

Error 1
mingw32-make: *** [release] Error 2
The process "E:Qtmingwbinmingw32-make.exe" exited with code 2.
Error 

while building project BiddingAssistant (target: Desktop)
When executing build step 'Make'

使用qt + vc是能编译通过的

，但是使用qtcreator时则提示以上问题。使用的是Qt SDK version 1.1.4

------解决方案--------------------
Ws2_32.lib
添加这个库文件到链接