[clang] [OpenMP] Implicitly include the 'cgpu' and 'mgpu' libraries for OpenMP (PR #67557)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

We may want to add something like `-nogpulibc`  to maybe disable this in cases where the user wants to use the functions from CUDA / HIP.

https://github.com/llvm/llvm-project/pull/67557