当运行mingw32-make.exe时报错：
Creating library file: c:\Qt\2010.02.1\qt\lib\libQtWebKitd4.a
./obj\debug\QNetworkReplyHandler.o:QNetworkReplyHandler.cpp:(.text+0x5a): undefi
ned reference to `vtable for WebCore::FormDataIODevice'
./obj\debug\QNetworkReplyHandler.o:QNetworkReplyHandler.cpp:(.text+0x12c): undef
ined reference to `vtable for WebCore::FormDataIODevice'
./obj\debug\QNetworkReplyHandler.o:QNetworkReplyHandler.cpp:(.text+0x1f1): undef
ined reference to `vtable for WebCore::FormDataIODevice'
./obj\debug\QNetworkReplyHandler.o:QNetworkReplyHandler.cpp:(.text+0x293): undef
ined reference to `vtable for WebCore::FormDataIODevice'
./obj\debug\QNetworkReplyHandler.o:QNetworkReplyHandler.cpp:(.text+0x335): undef
ined reference to `vtable for WebCore::FormDataIODevice'
./obj\debug\QNetworkReplyHandler.o:QNetworkReplyHandler.cpp:(.text+0x820): undef
ined reference to `vtable for WebCore::QNetworkReplyHandler'
./obj\debug\QNetworkReplyHandler.o:QNetworkReplyHandler.cpp:(.text+0xa9e): undef
ined reference to `vtable for WebCore::QNetworkReplyHandler'
./obj\debug\QNetworkReplyHandler.o:QNetworkReplyHandler.cpp:(.text+0xd22): undef
ined reference to `WebCore::QNetworkReplyHandler::processQueuedItems()'
./obj\debug\FrameLoaderClientQt.o:FrameLoaderClientQt.cpp:(.text+0x314b): undefi
ned reference to `QWebPage::unsupportedContent(QNetworkReply*)'
./obj\debug\FrameLoaderClientQt.o:FrameLoaderClientQt.cpp:(.text+0x425e): undefi
ned reference to `QWebPage::downloadRequested(QNetworkRequest const&)'
collect2: ld returned 1 exit status
mingw32-make[2]: *** [..\..\..\..\lib\QtWebKitd4.dll] Error 1
mingw32-make[2]: Leaving directory `C:/Qt/2010.02.1/qt/src/3rdparty/webkit/WebCo
re'
mingw32-make[1]: *** [debug-all] Error 2
mingw32-make[1]: Leaving directory `C:/Qt/2010.02.1/qt/src/3rdparty/webkit/WebCo
re'
mingw32-make: *** [sub-webkit-make_default-ordered] Error 2
不知道如何解决
