On Fri, Jun 06, 2025 at 04:45:38PM +0900, Suleiman Souhlal wrote:

When cross compiling the kernel with clang, we need to override CLANG_CROSS_FLAGS when preparing the step libraries.

Prior to commit d1d096312176 ("tools: fix annoying "mkdir -p ..." logs when building tools in parallel"), MAKEFLAGS would have been set to a value that wouldn't set a value for CLANG_CROSS_FLAGS, hiding the fact that we weren't properly overriding it.

Cc: stable@vger.kernel.org Fixes: 56a2df7615fa ("tools/resolve_btfids: Compile resolve_btfids as host program") Signed-off-by: Suleiman Souhlal suleiman@google.com

lgtm

Acked-by: Jiri Olsa jolsa@kernel.org

thanks, jirka

---

v2:

• "Signed-off-by:" instead of "Signed-of-by".

v1: https://lore.kernel.org/lkml/20250606052301.810338-1-suleiman@google.com/

tools/bpf/resolve_btfids/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/bpf/resolve_btfids/Makefile b/tools/bpf/resolve_btfids/Makefile index afbddea3a39c..ce1b556dfa90 100644 --- a/tools/bpf/resolve_btfids/Makefile +++ b/tools/bpf/resolve_btfids/Makefile @@ -17,7 +17,7 @@ endif # Overrides for the prepare step libraries. HOST_OVERRIDES := AR="$(HOSTAR)" CC="$(HOSTCC)" LD="$(HOSTLD)" ARCH="$(HOSTARCH)" \

•   CROSS_COMPILE="" EXTRA_CFLAGS="$(HOSTCFLAGS)"
  

•   CROSS_COMPILE="" CLANG_CROSS_FLAGS="" EXTRA_CFLAGS="$(HOSTCFLAGS)"
  

RM ?= rm HOSTCC ?= gcc -- 2.50.0.rc0.642.g800a2b2222-goog