Re: [PATCH] selftests/bpf: ignore pointer types check with clang

[Ilya Leoshkevich]

On Fri, Apr 14, 2023 at 08:15:03AM +0200, Andrea Righi wrote:
> On Thu, Apr 13, 2023 at 09:56:00PM -0700, Alexei Starovoitov wrote:
> > On Wed, Apr 12, 2023 at 2:59 AM Andrea Righi <andrea.righi@xxxxxxxxxxxxx> wrote:
> > >
> > > Building bpf selftests with clang can trigger errors like the following:
> > >
> > >   CLNG-BPF [test_maps] bpf_iter_netlink.bpf.o
> > > progs/bpf_iter_netlink.c:32:4: error: incompatible pointer types assigning to 'struct sock *' from 'struct sock___17 *' [-Werror,-Wincompatible-pointer-types]
> > >         s = &nlk->sk;
> > >           ^ ~~~~~~~~
> > > 1 error generated.
> > 
> > I cannot reproduce this and BPF CI doesn't complain about it either.
> > What kind of clang do you use?
> > Some special version and build flags?
> 
> I'm using Ubuntu clang version 15.0.7 (Ubuntu 23.04), no special build
> flag (unless Ubuntu enables some different default flags, but it
> shouldn't be the case... I'll double check).
> 
> -Andrea

Hi,

FWIW, I see similar errors when I don't use recent pahole.

Best regards,
Ilya