windows下面的qt creator 编译：怎么老是出现下面的错误：
C:/iwmake/build_mingw_opensource/src/winmain/qtmain_win.cpp:92: undefined reference to `__gxx_personality_sj0'
C:/iwmake/build_mingw_opensource/src/winmain/qtmain_win.cpp:92: undefined reference to `_Unwind_SjLj_Register'
C:/iwmake/build_mingw_opensource/src/winmain/qtmain_win.cpp:141: undefined reference to `_Unwind_SjLj_Resume'
C:/iwmake/build_mingw_opensource/src/winmain/qtmain_win.cpp:141: undefined reference to `_Unwind_SjLj_Unregister'
