Bug #21514: Rust deprecation warning building ruby-3.4.5/yjit/src/codegen.rs

• Status: Open
• Assignee: -
• Target version: -
• ruby -v: ruby 3.4.5 (2025-07-16 revision 20cda200d3) +PRISM [x86_64-darwin16]
• Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN

[debo (David Bohman)]

I get the following warning when building ruby-3.4.5 from the tarball release. I am using rustc-1.88.0.

warning: `extern` declarations without an explicit ABI are deprecated
    --> ../ruby-3.4.5/yjit/src/codegen.rs:7406:1
     |
7406 | extern {
     | ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
     |
     = note: `#[warn(missing_abi)]` on by default