Re: [PATCH] scripts/kconfig/menu.c: warning: jump may be used uninitializedin this function

From: Madhavan Srinivasan
Date: Wed Oct 30 2013 - 01:33:37 EST

On Tuesday 29 October 2013 11:23 PM, Yann E. MORIN wrote:
> Christian, All,
> On 2013-10-27 19:02 -0700, Christian Kujau spake thusly:
>> On Sun, 27 Oct 2013 at 18:28, Christian Kujau wrote:
>>> While doing "make oldconfig" on 3.12-rc7 with gcc-4.7.2 (Debian), the
>>> following warning is printed:
>>> HOSTCC scripts/kconfig/
>>> In file included from scripts/kconfig/
>>> /usr/local/src/linux-git/scripts/kconfig/menu.c: In function âget_symbol_strâ:
>>> /usr/local/src/linux-git/scripts/kconfig/menu.c:586:18: warning: âjumpâ may be used uninitialized in this function [-Wmaybe-uninitialized]
>>> /usr/local/src/linux-git/scripts/kconfig/menu.c:547:19: note: âjumpâ was declared here
>> Grrr, only after I sent this message I found this was reported in
>> September already by Madhavan Srinivasan:
>> Does anybody know the state of this fix?
My bad, somehow this slipped from my todo list.

> The solution was to properly comment that this was a gcc issue, in that
> this is a spurious error, does not appear in previous gcc versions, and
> has been fixed in later gcc versions.
I also notice this with gcc 4.8.1 (20131002) build.

> Setting 'jump' to NULL may hide reall issues in case the code is changed
> in the future, so it is not appropriate a fix. Hence why the previously-
> submitted patches were not applied.
> I'll take this on me to properly fix this. Thanks for the heads up.
> Regards,
> Yann E. MORIN.

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