Makefile Formatter

Makefile Formatter accepts Makefile text as input and outputs a consistently formatted version that adheres to GNU Make conventions. It targets developers, build engineers, and teams maintaining large build systems, helping reduce diffs and improve code reviews. The tool focuses on Makefile semantics rather than command execution, so formatting changes do not affect build results.
The processor tokenizes lines, identifies targets, variables, and recipe blocks, then applies configurable rules such as converting non-tab recipe indentation to tabs, aligning left-hand sides, and optionally preserving comments. It supports common constructs like includes and simple conditionals, while avoiding changes to the underlying build logic.
With optional presets, teams can enforce per-project styles, control which sections are aligned, and decide whether to reorder definitions. The output is a deterministic reformatted Makefile plus an issues log describing any non-fatal formatting notes, enabling traceable reviews.
Typical usage includes standardizing Makefiles across repositories, preparing patches for submission, or integrating with linting and CI pipelines to enforce a consistent style without impacting build behavior.