Landing: 3872da84760f

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Project / Subsystem

gcc / fortran

Date

2026-06-07

Author

Paul Thomas

Commit

3872da84760f827365fc0f8d1fdc45ca25810f89

Source

github

Perf win

No

Breaking

No

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All attributes

project: gcc
subsystem: fortran
patch_id: —
commit_hash: 3872da84760f827365fc0f8d1fdc45ca25810f89
source_type: github
headline: Fortran requires MODULE prefix for separate module procedures
tldr: The Fortran compiler now correctly enforces the `MODULE` prefix for separate module procedures, preventing incorrect linking and improving diagnostic messages.
author: Paul Thomas
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • fortran
• compiler-bug
• language-compliance
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/3872da84760f827365fc0f8d1fdc45ca25810f89
date: 2026-06-07T00:00:00.000Z

The Fortran compiler was incorrectly suppressing a diagnostic for missing MODULE prefixes on separate module procedures when they were made accessible through host association in submodules. This allowed incorrectly linked code to compile. The compiler now uses the module_procedure attribute, which is not cleared during host association, to guard the diagnostic. This restores the intended error message and provides a clearer explanation of the requirement, ensuring correct handling of separate module procedures.