Re: how does -Wstringop-truncation work?

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On Mon, Jan 30, 2023 at 6:12 PM Segher Boessenkool
<segher@xxxxxxxxxxxxxxxxxxx> wrote:
>
> The manual says
>   The effectiveness of some warnings depends on optimizations also being
>   enabled.  For example '-Wsuggest-final-types' is more effective with
>   link-time optimization and some instances of other warnings may not be
>   issued at all unless optimization is enabled.  While optimization in
>   general improves the efficacy of control and data flow sensitive
>   warnings, in some cases it may also cause false positives.
>
>
> Flags like -O1 do more than just enabling some other flags.
>

Thank you!
Another point of clarification; how is it that -foptimize-strlen is
necessary for -Wstringop-truncation to work?  Is that noted somewhere?



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