Landing: c2dfe9cf64ab
Project / Subsystem
gcc / avr
Date
2026-08-22
Author
Georg-Johann Lay
Commit
c2dfe9cf64ab960d65d72e1eb6aa7069fce9a137
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- avr
- patch_id
- —
- commit_hash
- c2dfe9cf64ab960d65d72e1eb6aa7069fce9a137
- source_type
- github
- headline
- AVR object files tagged with C++ virtual table address space.
- tldr
- AVR object files now indicate the address space used for C++ virtual tables.
- author
- Georg-Johann Lay
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • avr
- • compiler
- • object file
- • c++
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-08-22T00:00:00.000Z
This patch adds the .gnu_attribute 4 (Tag_GNU_AVR_VTABLE_AS) tag to AVR object files, indicating the address space used for C++ virtual tables. This tag will be valuable for future extensions that might support vtables in non-generic address spaces. The compiler identifies vtable usage by tracking indirect calls to vtable entries and checking for vtable declarations in the varpool.