x264 OpenCL on OS X?

[Rash]

Has anyone ever been able to use OpenCL on OS X? I get an error during the shader's compilation.

[libx264 @ 0x7fd2b9003200] OpenCL acceleration enabled with NVIDIA GeForce GTX 680MX
[libx264 @ 0x7fd2b9003200] Compiling OpenCL kernels...
[libx264 @ 0x7fd2b9003200] OpenCL: OpenCL Build Warning : Compiler build log:
<program source>:91:5: warning: no previous prototype for function 'parallel_sum'
int parallel_sum( int value, int x, volatile local int *array )
^
(There are more)

This is on ffmpeg 2.8 and x264 core:146 r2555. OS X is on the latest updates.

I don't know if there is anything else for me to do at this point, so this is mostly a curiosity.