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Enable '-Werror' by default for all kernel builds

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  Enable '-Werror' by default for all kernel builds "Andrei Z." <no-email@invalid.invalid> - 2021-09-07 08:46 +0300

#33170 — Enable '-Werror' by default for all kernel builds

kernel/git/torvalds/linux.git
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3fe617ccafd6f5bb33c2391d6f4eeb41c1fd0151

<quote>

Enable '-Werror' by default for all kernel builds
... but make it a config option so that broken environments can disable 
it when required.

We really should always have a clean build, and will disable specific 
over-eager warnings as required, if we can't fix them. But while I 
fairly religiously enforce that in my own tree, it doesn't get enforced 
by various build robots that don't necessarily report warnings.

So this just makes '-Werror' a default compiler flag, but allows people 
to disable it for their configuration if they have some particular issues.

Occasionally, new compiler versions end up enabling new warnings, and it 
can take a while before we have them fixed (or the warnings disabled if 
that is what it takes), so the config option allows for that situation.

Hopefully this will mean that I get fewer pull requests that have new 
warnings that were not noticed by various automation we have in place.

Knock wood.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

<unquote>

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