Landing: baa4e4ddf800

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Project / Subsystem

gcc / pe/coff

Date

2026-08-09

Author

Oleg Tolmatcev

Commit

baa4e4ddf800602d818470ef493d3508c4e1e32a

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: pe/coff
patch_id: —
commit_hash: baa4e4ddf800602d818470ef493d3508c4e1e32a
source_type: github
headline: PE/COFF: Implement visibility attribute via .drectve
tldr: PE/COFF targets now support the visibility attribute by emitting directives to the .drectve section, matching Clang's behavior.
author: Oleg Tolmatcev
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • PE/COFF
• visibility
• linker
• MinGW
• Cygwin
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/baa4e4ddf800602d818470ef493d3508c4e1e32a
date: 2026-08-09T00:00:00.000Z

GCC’s PE/COFF targets (MinGW, Cygwin) previously ignored the visibility attribute with a warning. This commit implements support for VISIBILITY_HIDDEN and VISIBILITY_INTERNAL by emitting -exclude-symbols directives into the .drectve section. This behavior aligns with Clang and ensures that hidden symbols are correctly excluded from DLL exports, as the GNU linker respects these directives during auto-export processing.