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GDIFFMK(1)		    General Commands Manual		    GDIFFMK(1)

NAME
SYNOPSIS
       gdiffmk [ -aaddmark ] [ -cchangemark ] [	-ddeletemark ] [ -D [ -B ]
	       [ -Mmark1 mark2 ] ] [ -xdiffcmd ] [ -- ]	[ --help ]
	       [ --version ] file1 file2 [ output ]

DESCRIPTION
       gdiffmk	compares  two groff(1),	nroff(1), or troff(1) documents, file1
       and file2, and creates an output	which  is  file2  with	added  `margin
       character' (.mc)	commands that indicate the differences.

       If  the output filename is present, the output is written there.	 If it
       is - or absent the output is written to the standard output.

       If the file1 or file2 argument is - the standard	input is read for that
       input.  Clearly both cannot be -.

       Note that the output is not necessarily compatible with all macro pack-
       ages and	all preprocessors.  See	the BUGS section below.

OPTIONS
       -aaddmark
	      Use the addmark for source lines not in  file1  but  present  in
	      file2.  Default: +.

       -B     By  default,  the	deleted	texts marked by	the -D option end with
	      an added troff break command, .br, to ensure that	the  deletions
	      are  marked  properly.   This  is	the only way to	guarantee that
	      deletions	and small changes get flagged.	 This  option  directs
	      the program not to insert	these breaks; it makes no sense	to use
	      it without -D.

       -cchangemark
	      Use the changemark for changed source lines.  Default: |.

       -ddeletemark
	      Use the deletemark for deleted source lines.  Default: *.

       -D     Show the deleted portions	from changed and  deleted  text.   De-
	      fault delimiting marks: [[ ... ]].

       -Mmark1 mark2
	      Change  the  delimiting  marks  for  the -D option.  It makes no
	      sense to use this	option without -D.

       -xdiffcmd
	      Use the diffcmd command to perform the comparison	of  file1  and
	      file2.  In particular, diffcmd should accept the GNU diff	-Dname
	      option.  Default:	diff(1).

       --     All the following	arguments are treated as file names,  even  if
	      they begin with -.

       --help Print a usage message on standard	error output and exit.

       --version
	      Print version information	on the standard	output and exit.

BUGS
       The  output  is	not necessarily	compatible with	all macro packages and
       all preprocessors.  A workaround	that is	often successful against  pre-
       processor  problems  is	to  run	 gdiffmk on the	output of all the pre-
       processors instead of the input source.

       gdiffmk relies on the -Dname option of GNU diff(1)  to  make  a	merged
       `#ifdef'	 output	 format.  It hasn't been tested	whether	other versions
       of diff(1) do support this option.  See also the	-xdiffcmd option.

       Report bugs to <bug-groff@gnu.org>.  Include a complete,	self-contained
       example that will allow the bug to be reproduced, and say which version
       of gdiffmk you are using.

COPYRIGHT
       Copyright (C) 2004-2014 Free Software Foundation, Inc.

       This file is part of the	gdiffmk	utility, which is  part	 of  groff,  a
       free software project.

       You  can	 redistribute and/or modify gdiffmk under the terms of the GNU
       General Public License as published by the  Free	 Software  Foundation,
       either version 3	of the License,	or (at your option) any	later version.

       gdiffmk	is distributed in the hope that	it will	be useful, but WITHOUT
       ANY WARRANTY; without even the implied warranty of  MERCHANTABILITY  or
       FITNESS	FOR  A PARTICULAR PURPOSE.  See	the GNU	General	Public License
       for more	details.

       You should have received	a copy of the GNU General Public License along
       with this program.  If not, see <http://www.gnu.org/licenses/>.

AUTHORS
       This document was written and is	maintained by Mike Bianchi

SEE ALSO
       groff(1), nroff(1), gtroff(1), diff(1)

Groff Version 1.22.3		4 November 2014			    GDIFFMK(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | BUGS | COPYRIGHT | AUTHORS | SEE ALSO

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