Tested msvc2013. The linker can not find _imp_CommandLineToArgvW@8. It's in shell32.lib. I see qtmain.lib use the function CommandLineToArgvW, and winmain.pro add -lshell32 flag. But qtmain.lib is a static lib, so that flag does nothing i think. I change a line in mkspecs/win32-msvc2013/qmake.conf
QMAKE_LIBS_QT_ENTRY = -lqtmain
to
QMAKE_LIBS_QT_ENTRY = -lqtmain -lshell32
and it works
修改mkspecs/win32-msvc2013（对应的vs版本）/qmake.conf
找到
QMAKE_LIBS_QT_ENTRY = -lqtmain
修改为
QMAKE_LIBS_QT_ENTRY = -lqtmain -lshell32
参考：https://bugreports.qt.io/browse/QTBUG-44862