[ −aaddmark ]
[ −cchangemark ]
[ −ddeletemark ]
[ −D [ −B ]
[ −Mmark1 mark2 ] ]
[ −xdiffcmd ]
[ −− ]
[ −−help ]
[ −−version ] file1
file2 [ output ]
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
output filename is present, the output is written
there. If it is − or absent the output is
written to the standard output.
file1 or file2 argument is − the
standard input is read for that input. Clearly both cannot
Note that the
output is not necessarily compatible with all macro packages
and all preprocessors. See the BUGS section
Use the addmark for
source lines not in file1 but present in
file2. Default: +.
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.
Use the changemark for
changed source lines. Default: |.
Use the deletemark for
deleted source lines. Default: *.
Show the deleted portions from changed and deleted text.
Default delimiting marks: [[ ... ]].
Change the delimiting marks for
the −D option. It makes no sense to use this
option without −D.
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 −.
Print a usage message on standard error output and
Print version information on
the standard output and exit.
The output is
not necessarily compatible with all macro packages and all
preprocessors. A workaround that is often successful against
preprocessor problems is to run gdiffmk on the output
of all the preprocessors instead of the input source.
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
Report bugs to
Include a complete, self-contained example that will allow
the bug to be reproduced, and say which version of
gdiffmk you are using.
© 2004-2014 Free Software Foundation, Inc.
This file is
part of the gdiffmk utility, which is part of groff, a free
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.
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