opencl-c-headers 2.2~2018.02.21-gb5c3680-1 (armhf binary) in ubuntu cosmic

 OpenCL (Open Computing Language) is a multi-vendor open standard for
 general-purpose parallel programming of heterogeneous systems that include
 CPUs, GPUs and other processors.
 .
 This package provides the C development header files for the OpenCL API
 as published by The Khronos Group Inc. The corresponding specification and
 documentation can be found on the Khronos website.