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'GNU cflow' analyzes a collection of C source files and prints a graph charting control flow within the program. It can produce both direct and inverted flowgraphs for C sources, or optionally generate a cross-reference listing. It implements either POSIX or GNU (extended) output formats. Input files can optionally be preprocessed before analyzing. The package also provides an Emacs major mode, so users can examine the produced flowcharts in Emacs.


English user manual included, English user manual in Texinfo, DVI, PostScript, PDF, HTML, and plaintext formats available from

Heckert gnu.small.png This is a GNU package:cflow


Download version 1.4 (stable)
released on 11 October 2011

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LicenseVerified byVerified onNotes
GPLv3orlaterKelly Hopkins13 July 2009

Leaders and contributors

Sergey Poznyakoff Maintainer

Resources and communication

Audience Resource type URI
Developer VCS Repository Webview
Developer, user Mailing List Info/Archive

Software prerequisites

Kind Description
Weak prerequisite Emacs

This entry (in part or in whole) was last reviewed on 26 September 2014.


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