CUDA Mining Problem

I did not find any cuda plugin generated in target folder
I need to build cuda plugin. but I don’t know how to do.
how to config grin-miner.toml to use gpu mining?

How to use or install the following because default is c29 and want to mine C31. Cuckatoo_mean_cuda_gtx_31.cuckooplugin thank you for the help. Very much appreciated