Description
Due to a problem in the Intel® FPGA SDK for OpenCL version 19.3, this error may be seen when simulating an OpenCL kernel which doesn’t include the “kernel” keyword in it’s source file .
The kernel keyword ie (_kernel) should be in front of any function that is intended to be an OpenCL kernel, an example below
__kernel void vector_add
Resolution
This problem is fixed in Intel® FPGA SDK for OpenCL software version 20.1.