Re: Build failure with GCC 15 (-std=gnu23)

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Nathan Chancellor <nathan@xxxxxxxxxx> writes:

> On Mon, Jan 20, 2025 at 04:16:30PM -0800, Kees Cook wrote:
>> On Wed, Nov 20, 2024 at 03:28:35AM +0900, Masahiro Yamada wrote:
>> > Some Makefile overriding KBUILD_CFLAGS would forget to add
>> > $(CSTD_FLAG), for the same reason as they would forget to add
>> > -std=gnu11.
>> 
>> But at least we'd have 1 place to change when we changed the std level.
>> 
>> FWIW, I just ran into this build failure too testing GCC 15 from their
>> ToT. Both EFI and compressed Makefiles needed it in my build.
>
> Yeah, I suggested the simpler diff in a separate thread, which seems to
> agree with your testing:
>
> https://lore.kernel.org/20250120182048.GA3244701@ax162/
>
> I don't mind drafting up a commit message and sending those along if
> that would be preferrable.

At this point, I'd like to see the scattered -std= in given it seems
less objectionable, even if I'd prefer one place, as we already missed
one release being GCC 15-buildable. Happy to test/ack it if you're willing to send it.

thanks,
sam




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