[commit 1/3] Import gnulib's update-copyright script

[Joel Brobecker]

> > gdb/ChangeLog:
> > 
> >         * gnulib/extra/update-copyright: New file, imported from gnulib.
> 
> 
> It looks like this file was simply copied over instead of imported with
> gnulib-tool?  If I reimport the gnulib/ directory from scratch, we lose it:

I am pretty sure I pulled it using gnulib tool... But I think
I then just selectively checked the script in only, to avoid
bringing in more changes than necessary.

This business of maintaining our gnulib import is getting a little
silly, because we cannot determine for sure how people might have
imported stuff. Perhaps we should just go ahead with the script
I wrote to import/update our gnulib import, and make sure people
use that? It might not be the perfect way of doing it, but at least
it would be consistent.

> If I pull the "update-copyright" gnulib module in addition, with:
[...]
> then we get it back, but, we get an older 2010 version, thus we end up
> with a non-empty diff, see below.

Do you know why? I thought that it would just import whatever version
you have checked out. Did you do the import using the exact same
version that you used during the last import?

When I did this, I just pulled the latest gnulib from git, and then
called gnulib tool. That's why I am a little confused by you saying
that you'll update gnulib using gnulib-tool.

> It doesn't look like we miss anything important for us.  I think I'll
> apply this,

We'll need the latest version by the end of the year. There are two
things that it brings which we use: warnings when an FSF copyright
isn't found, and also merging all copyright years together into
one single range.

> Okay in principle?

Sure! I think you know how to use gnulib way better than I do.

-- 
Joel