Re: vc compare with last version differs from rcsdiff

[Aaron S. Hawley]

This is more an Emacs question than RCS, and I know little about Emacs,
but I'd use:
``M-x debug-on-entry vc-diff''

then to find out how to use the Emacs debugger try:
 ``C-h b''

This is what I saw in a session:

* vc-do-command("*vc-diff*" 2 "rcsdiff" "/www/htdocs/Files/file.php"
WORKFILE nil "-q" "-r1.4" nil "-c")
vc-backend-diff("/www/htdocs/Files/file.php")

so it looks like you should make sure your rcsdiff can handle:

rcsdiff -q -c -r1.4 myprog.sh

otherwise, try the emacs list.  perhaps one of the vc-mode authors will
pipe in here though.
/a

On Thu, 13 Nov 2003, Nikiforuk, Kevin wrote:

> I recently installed GNU Emacs 21.2.1 (hppa2.0n-hp-hpux11.00) of
> 2002-08-21 and after making some changes in a file, I tried to compare
> it to the previous version.  To my surprise, I was told that there had
> been no changes since the latest version of the file, which was
> obviously not the case.  To compare, I ran rcsdiff myprog.sh against it
> and it returned a whole raft of output.  Using the ps command I know
> what emacs ran the command
>
> /usr/bin/rcsdiff -r2.23 myprog.sh
>
> Unfortunately, HPUX truncates the output of ps, so I can't tell if any
> other flags were run.  Is there a way to turn on debugging so I can see
> what emacs runs and figure out why it thinks there were no changes?
>
> Thanks,
> Kevin

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