This package now provides the non-cuda version (as known as the
'cpy only' build).
If you want caffe2 with cuda support, use package caffe-cuda.
This new package naming schema will better reflect the package
contents. This conforms to tensorflow package naming from the
official repositories.
The newly released NCCL version 2 requires registration at the
NVIDIA developer webiste and a manual download. As this breaks
automated builds by AUR helpers, NCCL was disabled by default in
this package. It can still be enabled by uncommenting the proper
lines in the PKGBUILD file (instructions are at the top of the
PKGBUILD file).