Hi,
On Tue May 19, 2026 at 1:41 PM CEST, Harish via lists.openembedded.org Sadineni
wrote:
> From: Harish Sadineni <[email protected]>
>
> Enabling the Rust in-kernel feature pulls in clang-native as a
> dependency for the kernel build. During the perf build, the presence of clang
> causes all BUILD_BPF_SKEL dependency checks to succeed, which makes perf
> attempt
> to build bpftool as part of its build process and make build to fail.
>
> Previously, When Rust support was not enabled, BUILD_BPF_SKEL is set 0 due to
> missing
> clang dependency.
>
> Error:
> | make[3]: *** ../bpf/bpftool: No such file or directory. Stop.
>
> As a workaround currently disabling BUILD_BPF_SKEL to make perf to build.
>
> Signed-off-by: Harish Sadineni <[email protected]>
> ---
> meta/recipes-kernel/perf/perf.bb | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/meta/recipes-kernel/perf/perf.bb
> b/meta/recipes-kernel/perf/perf.bb
> index c3ef25fd99..9fc100e961 100644
> --- a/meta/recipes-kernel/perf/perf.bb
> +++ b/meta/recipes-kernel/perf/perf.bb
> @@ -438,3 +438,9 @@ perf_fix_sources () {
> fi
> done
> }
> +
> +python () {
> + kernel_features = d.getVar('KERNEL_FEATURES')
> + if 'rust' in kernel_features:
> + d.appendVar('EXTRA_OEMAKE', ' BUILD_BPF_SKEL=0')
> +}
I believe this could be done as:
EXTRA_OEMAKE += "${@bb.utils.contains('KERNEL_FEATURES', 'rust',
'BUILD_BPF_SKEL=0', '', d)}
This is the standard approach done in various places in OE-Core. Unless there's
a particular need for an anonymous Python function.
And since this is a workaround, a comment in the file explaining the reason for
it would be nice, I think, so we keep track of why we are doing this in the
first place.
Antonin
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