Apple doesn't actually define __CL_VERSION_1_0__ when version=1.0.
Apple doesn't actually define __CL_VERSION_1_0__ when version=1.0.

This might be a shared trait with others, so if the value isn't defined,
it is initialized.

awatry/libvpx.opencl,awatry/libvpx.opencl,awatry/libvpx.opencl,awatry/libvpx.opencl