[GSoC] Rust: Compiling the alloc crate - Status Report 5

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Project / Subsystem

gcc / rust

Date

2026-08-03

Proposer

Enes Cevik <enes@nsvke.com>

Source type

public_inbox

Consensus

Proposed

Sentiment

—/10

Technical tradeoffs

• Prioritizing alloc crate compilation over full mock core compilation due to trait solver issues.
• Accepting a potentially long review process for the complex unsized ADT patch.

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All attributes

project: gcc
subsystem: rust
patch_id: —
discussion_id: 1422be80e1e51f67711c466c4e7d9a6d@purelymail.com
source_type: public_inbox
title: [GSoC] Rust: Compiling the alloc crate - Status Report 5
headline: Rust: Compiling the alloc crate - Status Report 5
tldr: GCC Rust (gccrs) project reports progress on compiling the Rust alloc crate, with merged lang items and new unsized ADT support.
proposer: Enes Cevik <enes@nsvke.com>
consensus: Proposed
outcome: proposed
sentiment_score: —
technical_tradeoffs: • Prioritizing alloc crate compilation over full mock core compilation due to trait solver issues.
• Accepting a potentially long review process for the complex unsized ADT patch.
series_id: —
series_role: standalone
series_parts: []
tags: • gccrs
• rust
• gsoc
• alloc
• compiler-frontend
url: https://inbox.sourceware.org/gcc/1422be80e1e51f67711c466c4e7d9a6d@purelymail.com
bugzilla_url: —
date: 2026-08-03T00:00:00.000Z

[GSoC] Rust: Compiling the alloc crate - Status Report 5

This is the fifth status report for the GSoC project on compiling the Rust alloc crate with GCC Rust (gccrs). Key achievements this week include implementing four missing language items, with two already merged, and implementing infrastructure for unsized ADT coercion, enabling support for unsized ADTs and array-to-slice coercions. However, compilation of the mock core is blocked by trait solver issues, preventing progress on the alloc testsuite.