Landing: 4b0865a05625
Project / Subsystem
gcc / gcc
Date
2026-08-10
Author
Josef Melcr
Commit
4b0865a0562575358c93edac3d7c20a10422c628
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc
- patch_id
- —
- commit_hash
- 4b0865a0562575358c93edac3d7c20a10422c628
- source_type
- github
- headline
- Reject variadic functions with callback_only attribute
- tldr
- callback_only attribute handler now rejects variadic functions and updates documentation.
- author
- Josef Melcr
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • attribute
- • validation
- • documentation
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-08-10T00:00:00.000Z
GCC’s callback_only attribute handler has been updated to explicitly reject variadic functions. Previously, the handler and attribute implementation implicitly assumed non-variadic functions, which could lead to undefined behavior. This change adds necessary checks and updates documentation to reflect this restriction, ensuring correct usage of the attribute.