[pjmlp]

Khronos is to blame by having OpenCL be a C only game, while CUDA was C, C++ and Fortran with PTX for anyone else that wanted to write a compiler fronted for CUDA.

It took them being beaten by NVidia to actually care to add SPIR and C++ support to OpenCL.

Even now, while CUDA brings C++ compiler out of the box with their SDK, for OpenCL one needs to go to Codeplay and download their ComputeCpp Community edition compiler for SYSCL support, that might or not, support a given card. Hardly any better.