Re: [RFC 1/2] perf build: Allow passing extra Clang flags via EXTRA_BPF_FLAGS

[Arnaldo Carvalho de Melo <acme@kernel.org>]

On Tue, Feb 10, 2026 at 01:54:49PM +0800, hupu wrote:
> On Wed, Dec 24, 2025 at 2:20 AM Namhyung Kim <namhyung@kernel.org> wrote:
> >
> > Hello,
> >
> > On Tue, Dec 23, 2025 at 04:43:34PM +0800, hupu wrote:
> > > Add support for EXTRA_BPF_FLAGS in the eBPF skeleton build, allowing
> > > users to pass additional Clang options such as --sysroot or custom
> > > include paths when cross-compiling perf.
> > >
> > > This is primarily intended for cross-build scenarios where the default
> > > host include paths do not match the target kernel version.
> > >
> > > Example usage:
> > >     make perf ARCH="arm64" EXTRA_BPF_FLAGS="--sysroot=..."
> > >
> > > Change history:
> > >   v5:
> > >     - Update commit message
> > >   v4:
> > >     - Apply EXTRA_BPF_FLAGS directly to BPF skeleton build command
> > >       instead of modifying CLANG_OPTIONS
> > >   v3:
> > >     - Move the variable description comment to the top of Makefile.perf
> > >     - Update commit message
> > >   v2:
> > >     - Rename EXTRA_CLANG_FLAGS to EXTRA_BPF_FLAGS
> > >     - Update commit message
> > >   v1:
> > >     - Introduce EXTRA_CLANG_FLAGS to allow passing extra Clang options
> > >
> > > Signed-off-by: hupu <hupu.gm@gmail.com>
> >
> > Reviewed-by: Namhyung Kim <namhyung@kernel.org>
> >
> 
> Hi Namhyung,
> 
> Sorry to bother you.
> 
> I noticed that the patch adding support for EXTRA_BPF_FLAGS, which was
> previously reviewed by you, does not seem to be included in the latest
> released version. I just wanted to follow up and check on the current
> status of this patch, in case it was missed or delayed for some
> reason.
> 
> Thanks a lot for your time and review.

Applied this one,

- Arnaldo