[faiss] Add new port

[ahojnnes]

This PR adds FAISS as a new port. This resolves issue #1405.

[ahojnnes]

Thanks @NancyLi1013. I applied your suggested changes.

[NancyLi1013]

Could not locate cached archive: W:\0e\0e7428e6609fee29b8a0de5708cac8bece9a6ff9.zip
-- Downloading https://github.com/facebookresearch/faiss/archive/a17a631dc326b3b394f4e9fb63d0a7af475534dc.tar.gz...
CMake Error at scripts/cmake/vcpkg_download_distfile.cmake:102 (message):
  

  File does not have expected hash:

          File path: [ D:/downloads/temp/facebookresearch-faiss-a17a631dc326b3b394f4e9fb63d0a7af475534dc.tar.gz ]
      Expected hash: [ 78b85aa14d183e7e65bf79e70c2c13195728055957ca6c7618081097446aa9b8418d032ca6fc34d18461b8e9f080df88fe4eb62723f7044a794862c3e9efff56 ]
        Actual hash: [ f1ab5b3c4bb89d26c0bc425b59deb42c614d58c8c0d14447dc91db6428e9efe7e7e469d7e2ad3d00e1f068ae8ed997e6a9555e6b8427ab785f63637c2cd947a9 ]

  The file may have been corrupted in transit.  This can be caused by
  proxies.  If you use a proxy, please set the HTTPS_PROXY and HTTP_PROXY
  environment variables to
  "https://user:***@your-proxy-ip-address:port/".

You should also update the hash value.

[ahojnnes]

@NancyLi1013 It happened what I suspected to happen. The older version 1.6.3 doesn't compile, because they did not have CMake build files back then. I suggest to revert back to the proposed commit from above. Since then also many bug fixes have gone into the code, so we should really try to be on the latest version in the master branch.

[NancyLi1013]

Hi @ahojnnes
The version 1.6.3 doesn't support CMake, which is not related with the problem. The current issue is that the archive file failed to download.

I checked the upstream. There is another new release, we might update it to 1.7.4.

[ahojnnes]

@NancyLi1013 I updated to v1.6.4. It should work now.

[NancyLi1013]

Thanks for your quick update.
Have you tested the feature? Does it work fine?

[ahojnnes]

@NancyLi1013 I have tested the package for a while already. It works fine. One remaining open question is how to best manage the dependency against lapack and openblas, which both typically compile with special instruction sets. The current package configuration of faiss here compiles against lapack/openblas statically, which means that the produced package is not redistributable to another machine. Not sure what the best way is to manage this problem in vcpkg. Typically, you would always want to use an optimized lapack/blas implementation for your specific machine. Any suggestions?

[NancyLi1013]

Hi @ahojnnes
Is there any problem that the dependency includes lapack and openblas?

I noticed that other ports such as armadilloalso have the same dependency as faiss.

[ahojnnes]

@NancyLi1013 It seems like it is all fine. I also checked other libraries depending on lapack and openblas. I think we can get this PR merged as is. I tested this quite extensively on Windows & Linux over the last weeks.

[NancyLi1013]

LGTM now, thanks for your PR @ahojnnes.

[BillyONeal]

Thanks for your contribution!