Re: nstrftime.c fails to build due to memset overflow

[Marcus Müller]

Hi Bruna,

thanks for answering,

On 14.03.23 17:41, Bruno Haible wrote:
> The build only fails because coreutils' configure.ac turns warnings into
> errors by default in some situation.

Obviously, I agree with this on the deprecated functionality warning, but the string 
method argument overflow warning really triggered my curiosity.

> So, this is not a significant bug. It's merely a false positive flagged by
> your compiler.
Uff! Sorry for the noise then.
> There are *many* -Wstringop-overflow bugs in recent GCC versions, see
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88443
>
> Some of them even have the exact same warning message, see
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86345
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89337
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100477
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106409
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108377

Didn't expect that; I had expected integer derivation warnings are "pretty safe", as 
integer constant folding is something an optimizing compiler has to do *correctly*, 
anyway. (and, honestly, coming from a C++ background, these are *a lot of warnings* that 
we're getting here).

Thanks,

Marcus