A compile error about sitl

[githublearner-li]

I’m so sorry to answer you so late and congratulations on solving this problem. I solved this error by @peterbarker 's patch as written above(A compile error about sitl - #2 by peterbarker).

@peterbarker

diff --git a/libraries/AP_GyroFFT/AP_GyroFFT.cpp b/libraries/AP_GyroFFT/AP_GyroFFT.cpp index 849be3ebe6…ebf9277f0a 100644 — a/libraries/AP_GyroFFT/AP_GyroFFT.cpp +++ b/libraries/AP_GyroFFT/AP_GyroFFT.cpp @@ -384,7 +384,7 @@ uint16_t AP_GyroFFT::run_cycle() FloatBuffer& gyro_buffer = (_sample_mode == 0 ?_ins->get_raw_gyro_window(_update_axis) : _downsampled_gyro_data[_update_axis]); // if we have many more samples than the window size then we are struggling to // stay ahead of the gyro loop so drop samples so that this cycle will use all available samples - if (gyro_buffer.available() > _state->_window_size + uint16_t(_samples_per_frame >> 1)) { // half the frame size is a heuristic + if (gyro_buffer.available() > unsigned(_state->_window_size + uint16_t(_samples_per_frame >> 1))) { // half the frame size is a heuristic gyro_buffer.advance(gyro_buffer.available() - _state->_window_size); } // let’s go!

The whole process is:

1. open the ardupilot folder in your machine, find the ../libraries/AP_GyroFFT/AP_GyroFFT.cpp and open it.
2. find this the line 387: if (gyro_buffer.available() > _state->_window_size + uint16_t(_samples_per_frame >> 1)) { // half the frame size is a heuristic
3. change it to if (gyro_buffer.available() > unsigned(_state->_window_size + uint16_t(_samples_per_frame >> 1))) { // half the frame size is a heuristic
4. compile it again and you will find it works.