not better
test cpp engine for medfilt2d ... ok
testOpenCLMedFilt2d (silx.image.test.test_medianfilter.TestMedianFilterEngines)
test cpp engine for medfilt2d ... pocl error: lt_dlopen("(null)") or lt_dlsym()
failed with 'can't close resident module'.
note: missing symbols in the kernel binary might be reported as 'file not
found' errors.The next step will be to ding in the code and find the culprite.
