Failure to build torch-sys, manual installation

[Rushmore75]

I have these environment variables set:

export TORCH_CUDA_VERSION="cu117"
export LIBTORCH="/home/oliver/sources/libtorchcxx11"
export LD_LIBRARY_PATH="${LIBTORCH}/lib:$LD_LIBRARY_PATH"

But when I go to build, it stops on torch-sys, which fails to build. Using rust-bert = "0.19.0". The error is about 1k lines of incorrect macros and function uses. I can compile tch-rs on my computer just fine, but that uses torch-sys 0.9 instead of 0.8. I could build everything from source but it's getting to be a long process at that point. Having to host a this dependency then a dependency of this.

So basically the dependencies need to be updated (from what it appears to me, but I might have made another mistake.)

[Rushmore75]

It seems that just building this from source then tying it in as a dependency with

rust-bert = {version = "0.19.0", path="../rust-bert"}

works. And I see it uses torch-sys 0.9.0 in the cargo.toml so I guess the version from crates.io is outdated?

[guillaume-be]

Hello @Rushmore75 ,

The version published on crates.io depends on tch ~0.8.0. tch ~0.9.0 is not backward compatible with tch ~0.8.0. You have 2 options for installing the crate:

1. Use the version published on crates.io. This depends on tch ~0.8.0 which expects LIBTORCH v1.12. You would need to download this version of LIBTORCH and update your environment variables accordingly.
2. Use the latest version in this repository, which currently relies on tch ~0.9.0 and expects LIBTORCH v1.13. You would need to download and point to this version of the library instead.

When a new version of this library is released both will use LIBTORCH v1.13 (unless a new version of torch is released in the meantime). The README should be accurate for both crates.io and on this repository (but contain different information)

Please let me know if this helps.

[Rushmore75]

I didn't change what libtorch version I was using between building from source or using the version from crates.io tho?

[guillaume-be]

I believe it may be part of the issue: the libtorch version used by the version in crates.io and from this repository are indeed different.

[Rushmore75]

Ok. So shouldn't the readme be updated then? At least with a section about if not installing via source but just as a dependancy