From: Wang Mingyu <[email protected]> When CONFIG_DEBUG_INFO_BTF is enabled in the kernel, building external modules that use BPF requires the 'resolve_btfids' host tool. This tool and its dependencies live in tools/bpf/ and tools/lib/, but were not included in the kernel-devsrc package.
This caused a build failure in the SDK when running 'make scripts prepare': make[4]: *** No rule to make target '.../tools/bpf/resolve_btfids/main.o' Copy tools/bpf/ and tools/lib/ into the devsrc build directory when CONFIG_DEBUG_INFO_BTF=y is detected in the kernel config, matching the existing pattern for the 'rust' directory and for objtool. Signed-off-by: Wang Mingyu <[email protected]> --- meta/recipes-kernel/linux/kernel-devsrc.bb | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/meta/recipes-kernel/linux/kernel-devsrc.bb b/meta/recipes-kernel/linux/kernel-devsrc.bb index 237dec6b12..23779ed107 100644 --- a/meta/recipes-kernel/linux/kernel-devsrc.bb +++ b/meta/recipes-kernel/linux/kernel-devsrc.bb @@ -176,6 +176,19 @@ do_install() { cp -a --parents $(find tools/arch/${ARCH}/ -type f) $kerneldir/build/ fi + # In sdk, when CONFIG_DEBUG_INFO_BTF is enabled, building external modules + # that use BPF may require the 'resolve_btfids' host tool. This tool + # and others require sources from tools/bpf/ and tools/lib/ to be built + # within the SDK environment. + if grep -q "CONFIG_DEBUG_INFO_BTF=y" ${B}/.config; then + echo "NOTE: CONFIG_DEBUG_INFO_BTF is enabled, including BPF host tools sources in kernel-devsrc." + # The 'rust' example copies the whole dir. We do the same for consistency. + # This includes resolve_btfids and other potential BPF tools. + cp -r tools/bpf ${kerneldir}/build/tools/ + # This also requires the shared tools/lib directory. + cp -r tools/lib ${kerneldir}/build/tools/ + fi + if [ "${ARCH}" = "arm64" ]; then # arch/arm64/include/asm/xen references arch/arm cp -a --parents arch/arm/include/asm/xen $kerneldir/build/ -- 2.43.0
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