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Fix host tools build directory structure by separating obj/ from output (HOST_BUILD_DIR now points to $(OBJ_DIR)/host/obj) 2. Properly propagate CROSS_COMPILE to libbpf sub-make invocation 3. Add missing $(HOST_BPFOBJ) build rule with proper host toolchain flags (ARCH=3D, CROSS_COMPILE=3D, explicit HOSTCC/HOSTLD) 4. Consistently quote $(HOSTCC) in bpftool build rule 5. Change LDFLAGS assignment to +=3D to allow external extensions The changes ensure proper cross-compilation behavior while maintaining backward compatibility with native builds. Host tools are now correctly built with the host toolchain while target binaries use the cross-toolchain. Signed-off-by: yangsonghua --- tools/sched_ext/Makefile | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/tools/sched_ext/Makefile b/tools/sched_ext/Makefile index ca3815e572d8..d68780e2e03d 100644 --- a/tools/sched_ext/Makefile +++ b/tools/sched_ext/Makefile @@ -61,8 +61,8 @@ SCXOBJ_DIR :=3D $(OBJ_DIR)/sched_ext BINDIR :=3D $(OUTPUT_DIR)/bin BPFOBJ :=3D $(BPFOBJ_DIR)/libbpf.a ifneq ($(CROSS_COMPILE),) -HOST_BUILD_DIR :=3D $(OBJ_DIR)/host -HOST_OUTPUT_DIR :=3D host-tools +HOST_BUILD_DIR :=3D $(OBJ_DIR)/host/obj +HOST_OUTPUT_DIR :=3D $(OBJ_DIR)/host HOST_INCLUDE_DIR :=3D $(HOST_OUTPUT_DIR)/include else HOST_BUILD_DIR :=3D $(OBJ_DIR) @@ -98,7 +98,7 @@ ifneq ($(LLVM),) CFLAGS +=3D -Wno-unused-command-line-argument endif =20 -LDFLAGS =3D -lelf -lz -lpthread +LDFLAGS +=3D -lelf -lz -lpthread =20 IS_LITTLE_ENDIAN =3D $(shell $(CC) -dM -E -