I have a Netlify function written in Rust which depends on ring (a crypto library) through reqwest (a HTTP client). It compiles on local environments, but the deploy bot fails to publish the function with the following error message: 5:51:57 PM: error: failed to run custom build command for `ring…

Our build system has been updated and the packages musl and musl-tools are now available. In my tests, the ring crate is now successfully compiling for the target x86_64-unknown-linux-musl.

Hey @sei0o , Sadly, Rust Functions is a very very niche area for the time being and the Support Team has little to no knowledge about it yet. We’ve passed on your issue to the engineers and would circle back once we’ve more information.

Hey @sei0o , I wanted to give you a quick update. We are still looking into this and how to solve it. For the time being, you can also work around this limitation yourself by compiling the function yourself. So either on you local machine or on a CI provider you can compile you rust function and th…

Anyone else having this issue, @chrisbiscardi has a great video explanation: Know this before deploying Rust to Netlify Functions - YouTube

Chris and I discussed this a bit in chat. We are both thinking it’s best to precompile and deploy from another CI system that supports cargo-zigbuild to cross compile the correct target. Netlify could help out by including Zig in the build environment, but not sure if that would happen. Although th…

Thank you all for replies! Yes, compiling on local environments seems reasonable for now. @talves Zig is available in Homebrew , won’t that help?

@sei0o and others, If you are interested in using Netlify for the crate cross compile builds on your Rust functions, I created a solution that works fairly well for now using cargo-zigbuild. tldr; Basically write a script to install zig binary using yarn (or npm) globally (6s install and only one …

I’ll test this later, but not sure that will work. Although it might compile, not sure GLIBC_2.28 will be available in AWS? This did work @danez . I’m curious what was needed to make this work, because locally I’m not able to make musl target correctly. ok, I see how musl-tools contains the musl-gc…

I want to add an explanation for those new to what is going on here and might be new to what we’re talking about. First, in this case, we are compiling our Rust function (crate library) to target a specific platform. Since these functions will run on AWS lambda, the operating system is linux on x86…

Hi Daniel, After some discussion, I’m of the opinion that the zigbuild solution is probably going to be better for the developer experience. Netlify should consider using it for the auto build deploy due to the fact that having local development and CI using the same solution would be better to sta…

Building ring crate for Rust-based function

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talves July 24, 2022, 6:38pm 9

Yeah, here is the post for homebrew: Now in experimental alpha: homebrew access in the build image

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Building ring crate for Rust-based function

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