clGetExtensionFunctionAddressForPlatform - Returns the address of the extension function named by

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       The function clGetExtensionFunctionAddressForPlatform returns the address of the extension function named
       by funcname for a given platform. The pointer returned should be cast to a function pointer type matching
       the extension function's definition defined in the appropriate extension specification and header file.

       A return value of NULL indicates that the specified function does not exist for the implementation or
       platform is not a valid platform. A non-NULL return value for clGetExtensionFunctionAddressForPlatform
       does not guarantee that an extension function is actually supported by the platform. The application must
       also make a corresponding query using clGetPlatformInfo(3clc) (platform, CL_PLATFORM_EXTENSIONS, ... ) or
       clGetDeviceInfo(3clc) (device,CL_DEVICE_EXTENSIONS, ... ) to determine if an extension is supported by
       the OpenCL implementation.

       clGetExtensionFunctionAddressForPlatform may not be queried for core (non-extension) functions in OpenCL.
       For functions that are queryable with clGetExtensionFunctionAddressForPlatform, implementations may
       choose to also export those functions statically from the object libraries implementing those functions.
       However, portable applications cannot rely on this behavior.

       Function pointer typedefs must be declared for all extensions that add API entrypoints. These typedefs
       are a required part of the extension interface, to be provided in an appropriate header (such as cl_ext.h
       if the extension is an OpenCL extension, or cl_gl_ext.h if the extension is an OpenCL/OpenGL sharing
       extension).

       clGetExtensionFunctionAddressForPlatform - Returns the address of the extension function named by
       funcname for a given platform.

       void*clGetExtensionFunctionAddressForPlatform(cl_platform_idplatform,constchar*funcname);

        1. OpenCL Specification
           page 7, section 9.2 - Getting OpenCL API Extension Function Pointers

The Khronos Group                                  11/18/2024                         CLGETEXTENSIONFUNCTI(3clc)

funcname
           Name of an extension function.

EXTENSION(3clc)

OpenCLSpecification[1]