[FFmpeg-trac] #6893(avutil:new): Compile hwcontext_opencl.c: undefined reference to several OpenCL functions

[FFmpeg]

#6893: Compile hwcontext_opencl.c: undefined reference to several OpenCL functions
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             Reporter:  LigH        |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avutil
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by LigH):

 I am no developer, my experience in C and Unix is limited. The media-
 autobuild_suite has to work automatically if it is working correctly, I
 don't intend to patch something when it's not clearly necessary; I would
 rather delete the whole ffmpeg working directory and let it clone anew.

 Passing the CL_VERSION_1_2 check appears to be somewhat wrong, may it
 either be that my GPU does not support it at all, or that the drivers got
 somewhat downgraded since the last run of the build suite. I wonder if I
 should blame Microsoft drivers from the Windows Update, and re-install
 drivers from Nvidia.

 At the moment, GPU-Z detects OpenCL 1.1 CUDA 6.5.51 for this GeForce 9600
 GT with Nvidia drivers 342.01 (latest for Series 9).

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Ticket URL: <https://trac.ffmpeg.org/ticket/6893#comment:6>
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