Method Init

src/utils/libftdi_serial.cpp:256–277

    {
    public:
        Init ()
        {
            libusb_version const &ver_obj = *libusb_get_version ();
            uint64_t usb_version = 0;
            for (uint64_t ver_part : {ver_obj.major, ver_obj.minor, ver_obj.micro, ver_obj.nano})
            {
                usb_version = (usb_version << 16) | ver_part;
            }

            // libusb_set_option was officially introduced in 1.0.22
            if (usb_version >= 0x0001000000160000)
            {
                jnienv_set = false;
                // on android, this disables device scan during usb_init, which lets it succeed
                libusb_set_option (nullptr, LIBUSB_OPTION_WEAK_AUTHORITY, nullptr);
            }
            else
            {
                // libusb is too old to pass options in
                jnienv_set = true;
            }
        }
        bool jnienv_set;
    } static init;