Re: [PATCH] compiler-clang: remove version check for BPF Tracing

[Alexei Starovoitov]

On Wed, Nov 4, 2020 at 11:11 AM Nick Desaulniers
<ndesaulniers@xxxxxxxxxx> wrote:
>
> bpftrace parses the kernel headers and uses Clang under the hood. Remove
> the version check when __BPF_TRACING__ is defined (as bpftrace does) so
> that this tool can continue to parse kernel headers, even with older
> clang sources.
>
> Cc: <stable@xxxxxxxxxxxxxxx>
> Fixes: commit 1f7a44f63e6c ("compiler-clang: add build check for clang 10.0.1")
> Reported-by: Chen Yu <yu.chen.surf@xxxxxxxxx>
> Reported-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
> Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
> ---
>  include/linux/compiler-clang.h | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
> index dd7233c48bf3..98cff1b4b088 100644
> --- a/include/linux/compiler-clang.h
> +++ b/include/linux/compiler-clang.h
> @@ -8,8 +8,10 @@
>                      + __clang_patchlevel__)
>
>  #if CLANG_VERSION < 100001
> +#ifndef __BPF_TRACING__
>  # error Sorry, your version of Clang is too old - please use 10.0.1 or newer.
>  #endif
> +#endif

I can take it through the bpf tree if no one objects.