You are right - thanks for this observation. Further mystified! Now corrected.
The reference at 0.0299 seconds is to libOpenCl.so.1, not to libOpenCL.so - and the manual clearly distinguishes between these. I do not have file libOpenCL.so and I have never had a problem finding file libOpenCL.so.1, So I still don’t understand how OpenCL can be activated.