QT关于中error: collect2: ld returned 1 exit status(我按网上方法找不出)
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debug/widget.o:D:\Files\QT_Project\tcp_test-build-desktop/../tcp_test/widget.cpp:21: undefined reference to `_imp___ZN12QHostAddressC1ENS_14SpecialAddressE' debug/widget.o:D:\Files\QT_Project\tcp_test-build-