Adding hex+zero-index offsets output to cmp (freebsd -x option)?

[JD Fenech]

I'm not sure how you guys do things here, so I'll keep it brief.

The version of cmp included with my version of Mint is 3.7, so I 
downloaded the official source tarball of 3.8 and built it. Easy enough. 
However, it does not include any option to output values and offsets as 
zero-indexed offsets and hexadecimal base. The offsets are one-indexed 
and printed as decimal, while the values of differing bytes are given in 
octal. Not really a showstopper, but also not especially convenient for 
programmers who prefer/are used to working with hexadecimal, 
zero-indexed offsets and working with hexadecimal values.

Obviously cmp has been around for awhile, so I'm not asking to change 
the default behavior. However, in looking into why things are what they 
are, I noticed that the freebsd version includes an -x option (exactly 
the same option name I would have picked, too) that does exactly what I 
want, but the mainstream ones do not. It should be quite a simple matter 
to include this as an option without breaking compatibility, I suspect. 
I was able to modify my own copy (without adding the command line 
switch, I just tweaked the output) to display the values in hex and the 
location as a zero-index offset. No clue why the location is converted 
to a string for output yet, but it's still in decimal.

So I can't imagine it would be much more work to add the option to tweak 
the output and copy a few lines with a different format string, or even 
port the analogous line from the freebsd version (the freebsd license 
doesn't seem to forbid this, but I'm not an expert on it).

Is this something that someone would be interested in 1) adding for the 
next version or 2) incorporating if I added it myself and provided a 
diff? I'm willing to get my hands dirty adding it if there's a 
reasonable chance it will get included.