Landing: cbf217f4c707

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Project / Subsystem

gcc / avr

Date

2026-08-17

Author

Georg-Johann Lay

Commit

cbf217f4c7076d4e23a34735d403a192d4e78191

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: avr
patch_id: —
commit_hash: cbf217f4c7076d4e23a34735d403a192d4e78191
source_type: github
headline: AVR: New option for strict address space subset relations
tldr: Introduces `-mstrict-addr-space-subsets` to enforce precise address space subset rules on AVR.
author: Georg-Johann Lay
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • avr
• compiler option
• address space
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/cbf217f4c7076d4e23a34735d403a192d4e78191
date: 2026-08-17T00:00:00.000Z

A new target option, -mstrict-addr-space-subsets, is introduced for the AVR architecture. This option enforces stricter address space subset relations, preventing code that attempts to access memory across unrelated spaces, such as reading from Flash as if it were RAM, unless explicitly allowed.