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From: Rolf Campbell <rcampbell-cygwin@dragonwaveinc.com>
Subject: Re: Wrong/ inconsistent responses from diff
Date: Mon, 23 Aug 2010 15:40:02 -0400
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On 2010-08-23 09:57, Fergus wrote:
> Somehow diff identifies differences in two identical binary files. In
> the following example two duplicate files are located (i) in my home
> directory (/m/home/user) and (ii) at the root of a different drive (D:).
>
[snip]
> ~> diff -s INTERVAL.pdf /d/INTERVAL.pdf
> Files INTERVAL.pdf and /d/INTERVAL.pdf differ
> ~> diff -s ./INTERVAL.pdf /d/INTERVAL.pdf
> Files ./INTERVAL.pdf and /d/INTERVAL.pdf differ
> ~> diff -s ~/INTERVAL.pdf /d/INTERVAL.pdf
> Files /home/user/INTERVAL.pdf and /d/INTERVAL.pdf differ
> ~> diff -s /home/user/INTERVAL.pdf /d/INTERVAL.pdf
> Files /home/user/INTERVAL.pdf and /d/INTERVAL.pdf differ
> ~> diff -s /m/home/user/INTERVAL.pdf /d/INTERVAL.pdf
> Files /m/home/user/INTERVAL.pdf and /d/INTERVAL.pdf are identical
>
> Using XP Pro SP3. This happens with the current cygwin1.dll and the
> snapshot dated 20100822.
>
> Fergus

Try using "diff --binary"


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