Landing: 5d0a9050f3a1

← All landings

Project / Subsystem

gcc / fortran

Date

2026-05-11

Author

Jerry DeLisle

Commit

5d0a9050f3a1c1f9f8e89188dec3d6f39c64a06a

Source

github

Perf win

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: fortran
patch_id: —
commit_hash: 5d0a9050f3a1c1f9f8e89188dec3d6f39c64a06a
source_type: github
headline: Fortran: Implement EX format specifier for WRITE
tldr: The Fortran compiler now supports the EX format specifier for WRITE statements, outputting floating-point numbers in hexadecimal format.
author: Jerry DeLisle
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • fortran
• I/O
• format specifier
• floating-point
• hexadecimal
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/5d0a9050f3a1c1f9f8e89188dec3d6f39c64a06a
date: 2026-05-11T00:00:00.000Z

The Fortran compiler now supports the EX format specifier for WRITE statements, as defined in Fortran 2018. This change adds the ability to output floating-point numbers in hexadecimal format for KIND=4, 8, 10, and 16 real numbers, if supported by the target architecture. Proper rounding of truncated hex float strings and the implementation of the READ functions are planned for future patches.