Cflow

GNU cflow
Developer	GNU Project
Stable release	1.8[1]  / 30 July 2025; 6 months ago (30 July 2025)
Repository	git.savannah.gnu.org/cgit/cflow.git
Operating system	Linux, UNIX
Type	flowgraph generator
License	GPL (free software)
Website	gnu.org/software/cflow/

cflow is a POSIX-defined shell command for generating a C-language flow graph. The GNU implementation reads C source code files, and generates a flow graph of external references. It uses only source files and does not need to run the program. Another implementation is available in Tru64 Unix.^[2]