新手请教，关于 QblueToothZero for windows

改pro档 的 LIBS += -lQBluetoothZero -lQt5Widgets 居然无效....难道不是缺lib link的问题??
以下是错误讯息之一
------------------------------------------
QChatWidgetClient.obj:-1: error: LNK2019: 无法解析的外部符号 "__declspec(dllimport) public: void __thiscall QWidget::addAction(class QAction *)" (__imp_?addAction@QWidget@@QAEXPAVQAction@@@Z) 在函式 "private: void __thiscall QChatWidgetClient::Setup(void)" (?Setup@QChatWidgetClient@@AAEXXZ) 中被参考
请问这是怎样的错误？

QT += widgets 这句远本就有了....
我不过是想在windows底下写蓝芽简单应用而已，能够扫秒到附近设备,能抓到RSSI强度就行，
怎么就是找不到一个可以用的Lib
以下是 QuteMessager.pro, 大哥能看出哪里有问题吗？
vs2012 + QT5.4
==================
TEMPLATE = app
TARGET = QuteMessenger
QT += core \
gui \
widgets
HEADERS += QChatWidgetClient.h \
QChatWidgetServer.h \
QChatWidget.h \
QuteMessenger.h \
QInputBox.h
SOURCES += QChatWidgetClient.cpp \
QChatWidgetServer.cpp \
QChatWidget.cpp \
main.cpp \
QuteMessenger.cpp \
QInputBox.cpp
FORMS += chatWidget.ui \
QuteMessenger.ui
RESOURCES += imageResources.qrc
symbian
{
INCLUDEPATH += /epoc32/include/QBluetoothZero
TARGET.UID3 = 0xE8D3B2DA
LIBS += -lQBluetoothZero -lQt5Widgets
TARGET.CAPABILITY = LocalServices \
NetworkServices \
ReadUserData \
UserEnvironment \
WriteUserData
customrules.pkg_prerules = \
";QBluetoothZero" \
"@\"$$(EPOCROOT)Epoc32/InstallToDevice/QBluetoothZero.sis\",(0xA003328D)"\
" "
DEP LOYMENT += customrules
}
win32
{
LIBS += -lQBluetoothZero -lQt5Widgets
INCLUDEPATH += ./QBluetoothZero
HEADERS += QBluetoothZero.h
}
ICON = val1.svg