rust-gpu how to use as a dependency? - rust

Question

I am trying to integrate rust-gpu into a project. The docs explain how to use it as a build dependency but the examples use it as a straight dependency, I have struggled with both but I would prefer to get the dependency version to work as it's more suited for my purposes.
I downloaded the rust-gpu git repo and compiled the ash example, which runs.
This is the toml I used for compilation:
[package]
name = "example-runner-ash"
version = "0.0.0"
authors = ["Embark <opensource#embark-studios.com>"]
edition = "2021"
license = "MIT OR Apache-2.0"
publish = false
# See rustc_codegen_spirv/Cargo.toml for details on these features
[features]
default = ["use-compiled-tools"]
use-installed-tools = ["spirv-builder/use-installed-tools"]
use-compiled-tools = ["spirv-builder/use-compiled-tools"]
[dependencies]
ash = "0.35"
ash-window = "0.9"
winit = "0.26"
structopt = "0.3.20"
cfg-if = "1.0.0"
shared = { path = "../../shaders/shared" }
spirv-builder = { path = "../../../crates/spirv-builder", default-features = false }
# TODO: Remove this once no longer needed, only needed to make cargo-deny happy for some reason.
# https://rustsec.org/advisories/RUSTSEC-2021-0119
nix = "0.20.2"
[target.'cfg(target_os = "macos")'.dependencies]
ash-molten = { version = "0.12.0", features = ["pre-built"] }
So I thought if I did something similar on my own code it would work:
[package]
name = "vulkan_bindings"
version = "0.1.0"
edition = "2021"
[features]
default = ["use-compiled-tools"]
use-installed-tools = ["spirv-builder/use-installed-tools"]
use-compiled-tools = ["spirv-builder/use-compiled-tools"]
[dependencies]
ash = { version = "0.37.0" }
glfw = { version = "0.45.0", features = ["vulkan"] }
gpu-allocator = "0.18.0"
ash-window = "0.9"
winit = "0.26"
structopt = "0.3.20"
cfg-if = "1.0.0"
# shared = { path = "../../shaders/shared" }
spirv-builder = { path = "rust-gpu/crates/spirv-builder", default-features = false }
paste = "1.0.8"
termcolor = "1.1.3"
But this fails with a multiplicity of errors, the first of which is:
error[E0432]: unresolved import `rustc_codegen_ssa::METADATA_FILENAME`
--> /home/makogan/.cargo/git/checkouts/rust-gpu-e0a37a82a46176e6/8052971/crates/rustc_codegen_spirv/src/link.rs:9:52
|
9 | use rustc_codegen_ssa::{CodegenResults, NativeLib, METADATA_FILENAME};
| ^^^^^^^^^^^^^^^^^ no `METADATA_FILENAME` in the root
Not that I am pointing my project to the spirv-builder crate in the rust-gpu repo I downloaded, which worked for the ash example.
I also tried just following the instructions in the docs
So I declared spirv-builder as a build-dependency (using the git link) and I made a build.rs build script and copy pasted the snippet in the docs, as described.
I get the same error about missing METADATA_FILENAME.
I do have a rust-toolchain file setup just like the docs mentioned, and I tried switching the edition field in the toml to 2018, but I consistently get the same error.
I am nto sure what to do now.