Function SoapySDRDevice_setClockSource 

pub unsafe extern "C" fn SoapySDRDevice_setClockSource(
    device: *mut SoapySDRDevice,
    source: *const c_char,
) -> c_int

Set the clock source on the device

\param device a pointer to a device instance \param source the name of a clock source \return an error code or 0 for success