How to setup Octave for GPU CUDA computing

I am using the xcorr function from Octave’s signal package on Linux:
https://sourceforge.net/p/octave/signal/ci/stable/tree/inst/xcorr.m

It has a bunch of fft, ifft, conj, etc in the script.

How to configure/compile Octave to use CUDA capabilities specifically for this xcorr function? Maybe using cuFFT somehow? Which gpu-accelerated library is the best for this function?

You are likely to get a better (and/or faster) answer by asking on the Octave help mailing list:

https://lists.gnu.org/mailman/listinfo/help-octave

I am using Octave to calculate two-dimensional (large) fields. That uses a lot of FFTs and IFFTs. To fasten the calculation I tried the CUDA-libraries. cuBLAS (from CUDA V8.0) is working fine but has no optimisation for the FFT-Routines. The video under “Drop-in Acceleration on GPUs with Libraries” - “Learning Libraries” shows how to use the CUDA-FFT instead of FFTW. I managed to install the octave sources (V. 4.0.3) and to compile a new binary that workes well. Unfortunately I am not so familiar with coding under Linux that I managed to replace the FFTW with the CUFFT. Has anyone made this and can provide me with the changed sources/files or a “howto”? That would be very helpful!
Thanks in advance!

Cross reference: http://lists.gnu.org/archive/html/help-octave/2016-12/msg00081.html