qt官方说在qt5.14版本后还是支持win7蓝牙，但是需要配置：
Qt 5.14 adds a native Win32 port supporting Classic Bluetooth on Windows 7 or newer, and Bluetooth LE on Windows 8 or newer. It must be enabled at build time by configuration option -native-win32-bluetooth. The UWP backend is used by default if this option is not set and the Win32 target platform supports the required UWP APIs (minimal requirement is Windows 10 version 1507, with slightly improved service discovery since Windows 10 version 1607).
“ -native-win32-bluetooth”这句话应该在哪配置啊
