[FFmpeg-user] building ffmpeg errors with vc++

[Forough Majidi]

On my system nvidia drivers is installed and I installed mingw-w64-x86_64-opencl-icd-git
and I built FFmpeg as following:
1-x86-x64 cross tools command prompt for VS 2019 run as administrator and Open mingw64 from the command prompt
2-cd c:\ffmpeg_test\ffmpeg
3-./configure -- toolchain=msvc --enable-opencl
But opencl not found
I export Path of "cl" and opencl.dll is in c:\windows\system32
Would you mind telling me how to solve it?