Landing: b77cf8f055cc
Project / Subsystem
gcc / c++
Date
2026-07-15
Author
Jakub Jelinek
Commit
b77cf8f055cce3e42f09410cbbf1e4f1e196b25d
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- c++
- patch_id
- —
- commit_hash
- b77cf8f055cce3e42f09410cbbf1e4f1e196b25d
- source_type
- github
- headline
- C++: In attributes expect _Clang namespace rather than __clang__
- tldr
- C++ attribute handling now prefers '_Clang::' over '__clang__::' for compatibility with Clang.
- author
- Jakub Jelinek
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • c++
- • attributes
- • compatibility
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-15T00:00:00.000Z
GCC’s C++ frontend now better handles Clang’s attribute namespace syntax for improved compatibility. While Clang’s __clang__ macro means it uses _Clang::__attribute__ internally, GCC will now accept _Clang:: as the preferred namespace and warn if __clang__:: is used. This change also ensures correct behavior for __has_cpp_attribute and __has_attribute when targeting Clang-specific attributes.