Landing: ea991f752fc2

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Project / Subsystem

gcc / gcc/fortran

Date

2026-07-21

Author

Thomas Koenig

Commit

ea991f752fc2a65a887c64190d8cad415edac8c9

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: gcc/fortran
patch_id: —
commit_hash: ea991f752fc2a65a887c64190d8cad415edac8c9
source_type: github
headline: Fix false positive warnings for unused/undefined variables in Fortran
tldr: Fortran compiler now correctly handles charlen in ALLOCATE, SELECT CASE expressions, and host-associated variables for warnings.
author: Thomas Koenig
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • fortran
• warnings
• compiler
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/ea991f752fc2a65a887c64190d8cad415edac8c9
date: 2026-07-21T00:00:00.000Z

The Fortran compiler has been updated to fix several instances where it incorrectly issued warnings for unused or undefined variables. Specifically, it now correctly marks the charlen of an ALLOCATE statement as used, ensures the expression in a SELECT CASE statement is recognized as used, and will not issue warnings for host-associated variables that are not declared private. These changes improve the accuracy of developer warnings.