macOS: main branch fails to compile with cranelift (unsupported section type mod_init_funcs)

[wyvernbw]

error: #[link_section = "__mod_init_func"] is not supported: unsupported section type mod_init_funcs

error: could not compile `bevy_reflect` (lib) due to 1 previous error

Bevy version and features

• main branch commit cbf989c

Relevant system information

running with cargo 1.91.0-nightly (a6c58d430 2025-08-26) on macOS 15.6

Steps to reproduce

create an empty project with bevy set to track the main branch and add cranelift to your .cargo/config.toml

[unstable]
codegen-backend = true

[profile.dev]
codegen-backend = "cranelift"

What went wrong

Project fails to compile bevy_reflect with the error

error: #[link_section = "__mod_init_func"] is not supported: unsupported section type mod_init_funcs

error: could not compile `bevy_reflect` (lib) due to 1 previous error

Related issues

This appears to be an issue in cranelift itself

• add support for mod_init_funcs (was compat: rust-ctor fails to trigger with Cranelift on MacOS, but works with LLVM) rust-lang/rustc_codegen_cranelift#1588

That being said (i think) downstream crates found workarounds?

• Add support for __mod_init_funcs on MacOS for cranelift compat dtolnay/inventory#82

im not very knowledgeable on either of these topics however so i cant say for sure.

[SkiFire13]

Can you check which version of inventory you're using in your Cargo.lock?

[wyvernbw]

# Cargo.lock
[[package]]
name = "inventory"
version = "0.3.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bc61209c082fbeb19919bee74b176221b27223e27b65d781eb91af24eb1fb46e"
dependencies = [
 "rustversion",
]

i just realized the issue on inventory's repo is one week old so i dont think theres anything to do on bevy's side other than wait for the fix to land in a release

[bjorn3]

The inventory half of this has been fixed, but the cg_clif half hasn't been yet. Basically inventory now sets the right section flag, but cg_clif doesn't yet have a way to pass this through to cranelift-object into the final object file.