In file included from ./libavutil/common.h:48:0,
                 from ./libavutil/avutil.h:301,
                 from ./libavutil/opt.h:31,
                 from libavdevice/sdl2.c:31:
./config.h:335:0: warning: 'HAVE_PTHREAD_SETNAME_NP' redefined
 #define HAVE_PTHREAD_SETNAME_NP 0
 
In file included from /usr/include/SDL2/SDL_stdinc.h:31:0,
                 from /usr/include/SDL2/SDL_main.h:25,
                 from /usr/include/SDL2/SDL.h:32,
                 from libavdevice/sdl2.c:26:
/usr/include/SDL2/SDL_config.h:186:0: note: this is the location of the previous definition
 #define HAVE_PTHREAD_SETNAME_NP 1
 
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....