Landing: 40e543b940e0

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Project / Subsystem

gcc / gccrs

Date

2026-09-02

Author

Arthur Cohen

Commit

40e543b940e012b43217b6776c166f4970aa75c8

Source

github

Perf win

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: gccrs
patch_id: —
commit_hash: 40e543b940e012b43217b6776c166f4970aa75c8
source_type: github
headline: Codegen compiles extern types as C void
tldr: Rust extern types are compiled to C void, aligning with RFC 1861 for FFI safety.
author: Arthur Cohen
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • rust
• codegen
• ffi
• types
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/40e543b940e012b43217b6776c166f4970aa75c8
date: 2026-09-02T00:00:00.000Z

This change modifies the GCC Rust frontend to compile extern types as C’s void type. RFC 1861 specifies that extern types are dynamically sized and FFI-safe, requiring them to be treated as C void. This ensures correct handling and compatibility for these types when interacting with C code.