how can i download the opencl header 2.1 or 2.2 from offical, i see header are 3.0 in github

The header does not tell you what version of OpenCL is available at runtime - after all the application might be run on a completely different machine than what was used at build time. You use clGetDeviceInfo with argument CL_DEVICE_VERSION to find out what is available at runtime.

I assume you want to ensure that you are not accidentally using features from newer OpenCL versions? In that case, see Compiling for a Specific OpenCL Version in the OpenCL-Headers repo’s readme file.

If the opencl header provided by the vendor is 3.0, how do I know which version of opencl I can use?If the vendor only implements opencl 1.2, should it only provide the 1.2 header instead of the 3.0 header?

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How can i download the opencl header 2.1 or 2.2 from offical

OpenCL

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