cc-mode and setting c-label-minimum-indentation

[Magnus Therning]

I've created a `.dir-locals.el` in a C project I work on:

~~~
((nil . ())
 (c-mode . ((c-file-style . "stroustrup")))
 )
~~~

However, when visiting a file in the project all labels have a minimum
indent of 1.  After quite a bit of digging I found that this behaviour
comes from `'c-label-minimum-indentation` and the GNU hook.

My questions:

1. Why is the GNU hook there at all?  (As far as I understand the
   Stroustrup style shouldn't include it.)
2. Is it possible to control the minimum label indentation from the
   style?
3. Apparently `'c-label-minimum-indentation` isn't safe for dir local
   settings, so what does the typical Emacs user do, mark the value 0
   as safe for `'c-label-minimum-indentation`, or simple set it to 0
   in `~/.emacs.d/init.el`?

Thankful for any and all answers/suggestions/replies.

/M

-- 
Magnus Therning                      OpenPGP: 0xAB4DFBA4 
email: magnus@therning.org   jabber: magnus@therning.org
twitter: magthe               http://therning.org/magnus

Most software today is very much like an Egyptian pyramid with
millions of bricks piled on top of each other, with no structural
integrity, but just done by brute force and thousands of slaves.
     -- Alan Kay

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