# The declaration-only header for NCCL

The header is copied from a build of NCCL (2.18.1 as of writing).

This declaration-only header is required to query the dynamically injected
NCCL API at runtime. See the following for more information:

* [NCCL Documentation](https://docs.nvidia.com/deeplearning/nccl/index.html)
* [BSD License](https://docs.nvidia.com/deeplearning/nccl/bsd/index.html)
* [Repository](https://github.com/NVIDIA/nccl)