Landing: 5d225c5aa3d4

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Project / Subsystem

gcc / libstdc++

Date

2026-05-05

Author

Jonathan Wakely

Commit

5d225c5aa3d40cbf479d99c0bb2ca22291a11568

Source

github

Perf win

Breaking

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project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: 5d225c5aa3d40cbf479d99c0bb2ca22291a11568
source_type: github
headline: libstdc++: Remove non-concepts fallback for make_shared_for_overwrite
tldr: The libstdc++ now requires compilers to support C++20 concepts for `std::make_shared_for_overwrite`.
author: Jonathan Wakely
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• C++20
• concepts
• memory management
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/5d225c5aa3d40cbf479d99c0bb2ca22291a11568
date: 2026-05-05T00:00:00.000Z

The libstdc++ now requires C++20 concepts for std::make_shared_for_overwrite. The non-concepts fallback implementation is removed, simplifying the code. This change is possible because Clang 10 and later provide support for concepts.