calls outputs a call graph of the functions in a C program. This helps the maintainer of a large program decide how expensive it might be to change the interface to a function (for example). With a little wrapper it can produce those (bogus) comment header blocks; or output just one function from a large source file (saves paper when printing).
calls-3.11: description + notes
This package also includes cdecl, a utility for composing and decomposing C declarations, and maketd, a tool for updating dependencies in Makefiles similar to makedepend.
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