GNU cflow NEWS -- history of user-visible changes. 2025-05-10
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Version 1.7.91 (git)

* Configuration system rewritten

Cflow is shipped with a set of "profiles", providing defaults for
different standards of the C language.  For example, to enable support
for gcc extensions it suffices to load the "gcc" profile:

  cflow --profile=gcc

Users can define their own profiles and place them in a well-known
disk locations for further use with the --profile option.

Site-wide or user-specific settings can be stored in the default
profile, which is always loaded.

Two more options are provided for managing profiles: --prepend-path
modifies the profile search path and -q disables the use of the
default profile.

The configuration system used in previous versions (via the
CFLOW_OPTIONS and CFLOWRC environment variables) is considered
deprecated, but is still supported for backward compatibility.

* cflow-mode improved.

* Bugfixes


Version 1.7, 2021-12-30

* Multiple start functions are allowed

The '--main' option can be given multiple times.  A separate graph
will be drawn for each function given as its argument.

* New option --target=FUNCTION

If this option is given, the produced graph will contain only paths
leading from start function (or functions) to the given FUNCTION.

Multiple '--target' options are allowed.

* New output format: dot

The '-f dot' (or '--format=dot') option instructs cflow to output
graph as a description in DOT language, suitable as input to graphviz
programs.

* cflow-mode: new commands for navigating in the graph:

  c   go to the calling function
  n   go to the next function at the same nesting level
  p   go to the previous function at the same nesting level

* Bugfixes:

** CVE-2019-16165
** CVE-2019-16166
** Fix parsing of K&R style function declarations
** Improve parsing of typecasts
** Fix recursive call detection


Version 1.6, 2019-02-23

* New option --all (-A)

Produce graphs for all global functions in the program.  Use this
option if your program contains functions which are not directly
reachable from main().

The output consist of separate flow graphs for each global function
defined in the program.  These graphs will be placed after the graph
for main() (if it exists), and will be ordered lexicographically by
the function name.

* New option --no-main

This option has the same effect as '--all', except that the graph for
main() function (if it exists) is treated same way as all the other
graphs, i.e. it will not be placed at the top of output, but in its
place as per the lexicographic ordering of function names.


Version 1.5, 2016-05-17

* Correctly handle functions returning struct/union (fixes bug #31792)
* Gracefully handle invalid inputs (fixes bug #44113)
* Debugging output goes to stderr
* Add a manpage
* Consistent use of exit codes


Version 1.4, 2011-10-11

* Symbol aliases

The `--symbol' option has been extended to allow for defining
symbol aliases.  Aliases are useful for declaring reserved
words such as `__restrict' or `__inline'.  For example,
the option `--symbol __restrict:=restrict' instructs cflow
to treat `__restrict' exactly as `restrict'.

* New syntactic class: qualifiers

Tokens in this class can legitimately appear in place
of C qualifiers, such as `static' or `inline'.  This class
is useful for some compiler-depending keywords, such as
`__extension__' in gcc.  The usual declaration of this symbol
is `--symbol __extension__:qualifier'.

* Speed up recursive call detection.

* Fix parsing of typedefs after `struct'.
* Fix the output of branch marks in tree mode.
* Fix processing of static inline functions (RH bug 650716).


Version 1.3, 2009-07-11

* Optimize symbol tables.

New symbol tables considerably improve the program performance.

* Bugfixes.


Version 1.2, 2007-06-29

* Licensed under the GPLv3


Version 1.1, 2006-07-09

* Bugfixes:
** Fix stack overflow on erroneous nameless function arguments.
** Fix global/static and static/static name clashes.
** Fix initial allocation for level mark array

* New localization: Danish and Vietnamese


Version 1.0, 2005-10-15

* First official release.


Version 0.2.3:

* Finished documentation.

* Added `--no-' options.


Version 0.2.2:

* Added testsuite

* New option --number=N (-nN) - print line numbers along with the flow tree
(default in POSIX mode)

* Added localization support. New localizations: Polish and Ukrainian.


Version 0.2:

* Added autoconf suite.
* Added POSIX output support.


Version 0.1:

Initial version restored from 1997 snapshots. 


----------------------------------------------------------------------
* Copyright information:

Copyright (C) 2005-2025 Sergey Poznyakoff

   Permission is granted to anyone to make or distribute verbatim copies
   of this document as received, in any medium, provided that the
   copyright notice and this permission notice are preserved,
   thus giving the recipient permission to redistribute in turn.

   Permission is granted to distribute modified versions
   of this document, or of portions of it,
   under the above conditions, provided also that they
   carry prominent notices stating who last changed them.

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