find_cuda_library("cudnn",tk) returns nothing about cudaapi.jl HOT 4 CLOSED

Oh sorry, forgot about that. Yes, this was the reason for the breaking 3.0 release: I removed most of the version databases in this package to lower the maintenance burden. Downstream users have to have some notion about the versions of a library that they support anyway, so I opted for having them pass that instead. For CUDNN, generally passing [v"7"] or whatever you require should work.

For CUDA itself, a minimal set of versions is maintained as it is required to discover the toolkit itself. You can them figure out the version of that toolkit by calling parse_toolkit_version with a tool that has a --version option (like nvdisasm or ptxas) and use that version to discover libraries that have the same version as the toolkit (CUBLAS, CUFFT, etc).

from cudaapi.jl.

Where exactly is the CUDNN DLL? Also please run with JULIA_DEBUG=CUDAapi.

from cudaapi.jl.

cudnn.lib is in C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\lib\x64
cudnn64_7.dll is in C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\bin

Debug: Looking for CUDA toolkit via environment variables CUDA_PATH    
└ @ CUDAapi C:\Julia-1.3.0\.julia\packages\CUDAapi\wYUAO\src\CUDAapi.jl:8
┌ Debug: Request to look for library cudnn
│   locations =
│    1-element Array{String,1}:
│     "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v10.1"
└ @ CUDAapi C:\Julia-1.3.0\.julia\packages\CUDAapi\wYUAO\src\CUDAapi.jl:8
┌ Debug: Looking for library cudnn64, cudnn
│   locations =
│    6-element Array{String,1}:
│     "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v10.1"
│     ⋮
│     "C:\\Program Files\\NVIDIA GPU Computing Toolkit\\CUDA\\v10.1\\bin\\x64"
└ @ CUDAapi C:\Julia-1.3.0\.julia\packages\CUDAapi\wYUAO\src\CUDAapi.jl:8

Fortunately I had an older sysimage compiled for Knet, which uses:

CUDAapi uuid = "3895d2a7-ec45-59b8-82bb-cfc6a382f9b3"
version = "2.1.0"

This one works

from cudaapi.jl.

Update:
It seems that versions variable from find_cuda_library is not populated.
version = "2.1.0" of CUDAapi has:

find_cuda_library(name::String, toolkit_dirs::Vector{String}=String[];
                  versions::Vector{VersionNumber}=reverse(get(cuda_versions, name, cuda_versions["toolkit"])),
                  kwargs...)

while latest version has:

function find_cuda_library(name::String, toolkit_dirs::Vector{String}=String[],
                           versions::Vector{VersionNumber}=VersionNumber[]; kwargs...)

from cudaapi.jl.