HIP rocm-4.5.x install from source on NVIDIA platform

[jakub-homola]

If I understand correctly, with the new rocm-4.5.x branches, this HIP repository contains only several things common to both NVIDIA and AMD platforms. Then there is the hipamd repository, which "provides HIP implementation specifically for AMD platform", according to the readme. I did not find anything about hipnvidia or anything like that.

The INSTALL.md seems to be relevant only for the AMD platform, since it mentions ROC* requirements, which are required only on the AMD platform.

So, what is currently the correct way of installing HIP from source on the NVIDIA platform?

I tried using only HIP as in previous versions, but hipcc complains about <hip/hip_version.h> not found, which really isn't there. Also the *_detail include directories are missing.

hipamd does work on the NVIDIA platform, but it seems weird, since it is supposed to be designed specifically for AMD.