[flashlight-cuda] New Port

[jacobkahn]

Adds a new port for flashlight, an ML library written in C++. I'm one of the project authors.

A few things to note:

• This port only contains support for the CUDA backend in flashlight. OpenCL/CPU backend support will be added in a separate port later when they are complete.
• The library depends on NCCL for which there doesn't currently exist a port (I've just created a PR, ideally, we commit that port first) - it uses find_package natively with a FindNCCL.cmake module. NCCL and cuDNN are very similar in their installations next to CUDA, so the NCCL port works exactly like the vcpkg cuDNN port.
  • CI will probably fail until the NCCL port is committed
• The features in the port depend on other features of the port:

lib
 ^
 |
 fl <— imgclass
 ^
 |
asr

• Which triplets are supported/not supported? Have you updated the CI baseline?

Supports linux for now. I've tested x64-linux. The port has !(windows|osx), but I will test the port on macOS shortly. I don't expect Windows integration to be complete for some time, but I will update the port if/when it is.

• Does your PR follow the maintainer guide?

Yes.

cc @tlikhomanenko @vineelpratap @xuqiantong @avidov @andresy @syhw @padentomasello

[JackBoosY]

Can you revert changes about nccl and depends on #14683?

[jacobkahn]

@JackBoosY done — I'll rebase on top of the NCCL port once it's done though.

[jacobkahn]

@JackBoosY how can I get detailed logs of this failure in CI?

[JackBoosY]

https://dev.azure.com/vcpkg/public/_build/results?buildId=45830&view=artifacts&pathAsName=false&type=publishedArtifacts
Do you have permission?

[jacobkahn]

@JackBoosY I have permission. How do I get to this page for future CI runs?

[JackBoosY]

@jacobkahn
Details-> View more details on Azure Pipelines -> * artifacts produced

@strega-nil Maybe we need to write documentation to the contributors.

[jacobkahn]

@JackBoosY is there some way I can know what command CI ran when this error happened? I'm unable to reproduce it.

[JackBoosY]

@jacobkahn Maybe the environment of our CI machine is different from yours. You can only use the log content to solve the regression.
And if you need more details of the regression, I will manually test it on the same machine and provide to you.

[jacobkahn]

@JackBoosY fixed the issue. Needed a default feature.

[strega-nil]

Thanks @jacobkahn