Thanks to Mr. Erik Smistad's excellent minimalist introduction to OpenCL, I have managed to set up AMD's OpenCL implementation on my development computer.

Soon after, I had clsurf up and running. It required some massage in order to work with a recent OpenCL version:
But it eventually compiled and ran successfully using CPU device (I don't have a dedicated GPU on my dev computer) to produce this lovely image:

Lena with SURF features marked with clsurf

Not bad for a midnight hack!

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