Why do I get the error “‘clGetProfileDataDeviceIntelFPGA’ was not declared in this scope” when compiling OpenCL host code? - Why do I get the error “‘clGetProfileDataDeviceIntelFPGA’ was not declared in this scope” when compiling OpenCL host code? Description The library function clGetProfileDataDeviceIntelFPGA must be called in the host code when dynamically profiling an autorun kernel. If this function is called directly, the host code compilation may fail with an error like the ones below. Linux (gcc) error: ‘clGetProfileDataDeviceIntelFPGA’ was not declared in this scope Windows (Microsoft Visual Studio) error: unresolved external symbol clGetProfileDataDeviceIntelFPGA If the system is using the ICD driver, non-standard functions such as *IntelFPGA functions cannot be used directly. The OpenCL call clGetExtensionFunctionAddress must be used to get a function pointer for the non-standard function and that pointer must be used to call it. Resolution Using the prototype of the function, located in CL/ext.h extern CL_API_ENTRY cl_int CL_API_CALL clGetProfileDataDeviceIntelFPGA( cl_device_id /*device_id*/, cl_program /*program*/, cl_bool /*read_enqueue_kernels*/, cl_bool /*read_auto_enqueued*/, cl_bool /*clear_counters_after_readback*/, size_t /*param_value_size*/, void * /*param_value*/, size_t * /*param_value_size_ret*/, cl_int * /*errcode_ret*/ ); Replace the function call cl_int status = clGetProfileDataDeviceIntelFPGA (device, program, false, true, false, 0, NULL, NULL, NULL); with code using the syntax below cl_int (*get_profile_fn)(cl_device_id, cl_program, cl_bool,cl_bool,cl_bool,size_t, void *,size_t *,cl_int *); get_profile_fn = (cl_int (*) (cl_device_id, cl_program, cl_bool,cl_bool,cl_bool,size_t, void *,size_t *,cl_int *))clGetExtensionFunctionAddress("clGetProfileDataDeviceIntelFPGA"); cl_int status = (cl_int)(*get_profile_fn) (device, program, false, true, false, 0, NULL, NULL, NULL); Custom Fields values: ['novalue'] Troubleshooting FB: 1408570460; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro', 'FPGA Dev Tools Quartus® Prime Software Standard'] novalue 17.1 ['Programmable Logic Devices'] ['HLD Tools OpenCL'] ['novalue'] ['novalue']