
OpenMPI includes cuda_runtime.h, which errors with `#error -- unsupported GNU version! gcc versions later than 9 are not supported!` By inheriting CudaPackage, the proper conflicts between `cuda` and `gcc`/`clang` are added.
OpenMPI includes cuda_runtime.h, which errors with `#error -- unsupported GNU version! gcc versions later than 9 are not supported!` By inheriting CudaPackage, the proper conflicts between `cuda` and `gcc`/`clang` are added.