ddd --version (return code: 0)
GNU DDD 3.3.12 (x86_64-pc-linux-gnu)
Copyright (C) 1995-1999 Technische Universität Braunschweig, Germany.
Copyright (C) 1999-2001 Universität Passau, Germany.
Copyright (C) 2001 Universität des Saarlandes, Germany.
Copyright (C) 2001-2009 Free Software Foundation, Inc.
ddd --help (return code: 0)
GNU DDD 3.3.12 (x86_64-pc-linux-gnu)
Copyright (C) 1995-1999 Technische Universität Braunschweig, Germany.
Copyright (C) 1999-2001 Universität Passau, Germany.
Copyright (C) 2001 Universität des Saarlandes, Germany.
Copyright (C) 2001-2009 Free Software Foundation, Inc.
This is DDD, the data display debugger, based on GDB, the GNU debugger.
Usage:
ddd [options...] executable-file [core-file | process-id]
Options (including GDB options):
--bash Invoke Bash as inferior debugger.
--configuration Show the DDD configuration flags and exit.
--dbg Invoke DBG as inferior debugger.
--dbx Invoke DBX as inferior debugger.
--debugger CMD Invoke inferior debugger as CMD.
--gdb Invoke GDB as inferior debugger.
--host USER@HOST Run inferior debugger on HOST.
--jdb Invoke JDB as inferior debugger.
--ladebug Invoke Ladebug as inferior debugger.
--license Show the DDD license and exit.
--make Invoke remake (GNU Make) inferior debugger.
--manual Show the DDD manual and exit.
--news Show the DDD news and exit.
--perl Invoke Perl as inferior debugger.
--pydb Invoke PYDB as inferior debugger.
--rhost USER@HOST Like --host, but use a rlogin connection.
--trace Show interaction with inferior debugger on standard error.
--tty Use controlling tty as additional debugger console.
--version Show the DDD version and exit.
--wdb Invoke WDB as inferior debugger.
--xdb Invoke XDB as inferior debugger.
Standard X options are also accepted, such as:
-display DISPLAY Run on X server DISPLAY.
-geometry GEOMETRY Specify initial size and location.
-iconic Start-up in iconic mode.
-foreground COLOR Use COLOR as foreground color.
-background COLOR Use COLOR as background color.
-xrm RESOURCE Specify a resource name and value.
For more information, consult the DDD `Help' menu, type `help' from
within DDD, and see the DDD and GDB documentation.