Errors with INT64 Atomics with AMD 8790M GPU

I have someone who is trying to use some code that I have written in OpenACC with the PGI compiler. It works fine for me using NVIDIA, but he is having some trouble using it with his AMD chip.

He is using an AMD 8790M Mobile GPU and is getting errors about the OpenCL Atomics extension not being supported in the pgi_opencl_runtime.h file. In particular, I think around line 549 there is an ifdef OCL_DBL_ATOMICS or some such that then enables some sort of INT64 ATOMICS extension.

What’s going on here? I don’t have the exact error message at the moment, but I’m wondering what I can do about this?