In file included from /usr/include/SDL2/SDL.h:38:0,
                 from libavdevice/sdl2.c:26:
/usr/include/SDL2/SDL_cpuinfo.h:63:5: warning: 'HAVE_IMMINTRIN_H' is not defined, evaluates to 0 [-Wundef]
 #if HAVE_IMMINTRIN_H && !defined(SDL_DISABLE_IMMINTRIN_H)
     ^~~~~~~~~~~~~~~~
In file included from libavfilter/opencl.h:31:0,
                 from libavfilter/opencl.c:26:
./libavutil/hwcontext_opencl.h:25:10: fatal error: CL/cl.h: No such file or directory
 #include 
          ^~~~~~~~~
compilation terminated.
make: *** [libavfilter/opencl.o] Error 1
make: *** Waiting for unfinished jobs....