kbuild, bpf: Specify "layout" optional feature

The "layout" feature will add metadata about BTF kinds to the
generated BTF; its absence in pahole will not trigger an error so it
is safe to add unconditionally as it will simply be ignored if pahole
does not support it.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260326145444.2076244-10-alan.maguire@oracle.com

diff --git a/scripts/Makefile.btf b/scripts/Makefile.btf
index 562a04b40e06163e2a91d91eba0381047937c796..e66e13e796538ba58fcef6da4ce11f04415566dc 100644 (file)
--- a/scripts/Makefile.btf
+++ b/scripts/Makefile.btf
@@ -18,6 +18,8 @@ pahole-flags-$(call test-ge, $(pahole-ver), 126)  = -j$(JOBS) --btf_features=enc
 
 pahole-flags-$(call test-ge, $(pahole-ver), 130) += --btf_features=attributes
 
+pahole-flags-$(call test-ge, $(pahole-ver), 131) += --btf_features=layout
+
 endif
 
 pahole-flags-$(CONFIG_PAHOLE_HAS_LANG_EXCLUDE)         += --lang_exclude=rust