/usr/local/lib64/python3.6/site-packages/torch/include/torch/csrc/autograd
Edit: /usr/local/lib64/python3.6/site-packages/torch/include/torch/csrc/autograd/python_fft_functions.h (128B)
#pragma once
namespace torch { namespace autograd {
void initFFTFunctions(PyObject* module);
}} // namespace torch::autograd