Cannot find OpenCL headers?

[vaanwd]

I have installed Nvidia CUDA Toolkit 8.0.61 in e:\FFMPEG\CUDA and setting the env. variable CUDA_PATH=e:\FFMPEG\CUDA

Then:

project_generate.exe --enable-gpl --enable-version3 --enable-bzlib --enable-iconv --enable-lzma --enable-sdl2 --enable-zlib --enable-avisynth --enable-libfdk-aac --enable-dxva2 --enable-d3d11va --enable-nonfree --enable-libmp3lame --enable-libvorbis --enable-libspeex --enable-libopus --enable-libilbc --enable-libtheora --enable-libx264 --enable-libx265 --enable-libxvid --enable-libvpx --enable-libgme --enable-libmodplug --enable-libsoxr --enable-librtmp --enable-libfreetype --enable-fontconfig --enable-libfribidi --enable-libass --enable-libxml2 --enable-gnutls --enable-pic --enable-runtime-cpudetect --enable-gcrypt --enable-gmp --enable-libssh --enable-libcdio --enable-libbluray --enable-libmfx --enable-nvenc --enable-nvdec --enable-ffnvcodec --enable-opencl --enable-opengl --enable-cuda --enable-cuvid --enable-amf --toolchain=msvc

Project generator (this may take several minutes, please wait)...
  Passing configure file...
  Warning: Reserved option (pic) was passed in command line option (--enable-pic)
           This option is reserved and will be ignored
  Outputting config.h...
  Outputting avconfig.h...
  Outputting ffversion.h...
  Outputting enabled components file libavfilter/filter_list.c...
  Outputting enabled components file libavcodec/codec_list.c...
  Outputting enabled components file libavcodec/parser_list.c...
  Outputting enabled components file libavcodec/bsf_list.c...
  Outputting enabled components file libavformat/demuxer_list.c...
  Outputting enabled components file libavformat/muxer_list.c...
  Outputting enabled components file libavdevice/indev_list.c...
  Outputting enabled components file libavdevice/outdev_list.c...
  Outputting enabled components file libavformat/protocol_list.c...
  Generating from Makefile (../../ffmpeg/libavdevice/MakeFile)...
  Generating missing DCE symbols (libavdevice)...
  Generating project exports file (libavdevice)...
  Generating project file (libavdevice)...
  Generating from Makefile (../../ffmpeg/libavfilter/MakeFile)...
  Generating from Makefile (../../ffmpeg/libavfilter/x86/MakeFile)...
  Error: Could not find valid source file for object (opencl/avgblur)
Press any key to continue . . .