Re: [PATCH] bpftool: build bpf bits with -std=gnu11

[Quentin Monnet <qmo@kernel.org>]

On 02/05/2025 09:57, Holger Hoffstätte wrote:
> A gcc-15-based bpf toolchain defaults to C23 and fails to compile various
> kernel headers due to their use of a custom 'bool' type.
> Explicitly using -std=gnu11 works with both clang and bpf-toolchain.
> 
> Signed-off-by: Holger Hoffstätte <holger@applied-asynchrony.com>

Thanks! I tested that it still works with clang.

Acked-by: Quentin Monnet <qmo@kernel.org>

I didn't manage to compile with gcc, though. I tried with gcc 15.1.1 but
option '--target=bpf' is apparently unrecognised by the gcc version on
my setup.

Out of curiosity, how did you build using gcc for the skeleton? Was it
enough to run "CLANG=gcc make"? Does it pass the clang-bpf-co-re build
probe successfully?

Thanks,
Quentin