Landing: efe29124c748

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Project / Subsystem

gcc / libstdc++

Date

2026-04-29

Author

Tomasz Kamiński

Commit

efe29124c7486a72f23d002e40376fc0f38c21fc

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: efe29124c7486a72f23d002e40376fc0f38c21fc
source_type: github
headline: Libstdc++: Test ATOMIC_*_LOCK_FREE macros for <stdatomic.h>
tldr: This commit adds a test case for the ATOMIC_*_LOCK_FREE macros in <stdatomic.h>, ensuring compliance with the C++ standard.
author: Tomasz Kamiński
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• testsuite
• atomics
• C++
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/efe29124c7486a72f23d002e40376fc0f38c21fc
date: 2026-04-29T00:00:00.000Z

This commit adds a new test case to verify the correctness of the ATOMIC_*_LOCK_FREE macros provided by the <stdatomic.h> header. The test is a copy of an existing test for with the header include adjusted to test the freestanding header provided by the C standard. This change ensures that the libstdc++ implementation adheres to the requirements of LWG 4480, which mandates the presence of ATOMIC_CHAR8_T_LOCK_FREE.