From: Hui Zhu <teawaterz@xxxxxxxxxxxxxxxxx> Got an error when I built samples/bpf in a separate directory: make O=../bk/ defconfig make -j64 bzImage make headers_install make V=1 M=samples/bpf ... ... make -C /home/teawater/kernel/linux/samples/bpf/../..//tools/build CFLAGS= LDFLAGS= fixdep make -f /home/teawater/kernel/linux/samples/bpf/../..//tools/build/Makefile.build dir=. obj=fixdep make all_cmd Warning: Kernel ABI header at 'tools/include/uapi/linux/netlink.h' differs from latest version at 'include/uapi/linux/netlink.h' Warning: Kernel ABI header at 'tools/include/uapi/linux/if_link.h' differs from latest version at 'include/uapi/linux/if_link.h' gcc -Wp,-MD,samples/bpf/../../tools/testing/selftests/bpf/.cgroup_helpers.o.d -Wall -O2 -Wmissing-prototypes -Wstrict-prototypes -I./usr/include -I/home/teawater/kernel/linux/tools/testing/selftests/bpf/ -I/home/teawater/kernel/linux/tools/lib/ -I/home/teawater/kernel/linux/tools/include -I/home/teawater/kernel/linux/tools/perf -DHAVE_ATTR_TEST=0 -c -o samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.o /home/teawater/kernel/linux/samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.c /home/teawater/kernel/linux/samples/bpf/../../tools/testing/selftests/bpf/cgroup_helpers.c:315:1: fatal error: opening dependency file samples/bpf/../../tools/testing/selftests/bpf/.cgroup_helpers.o.d: No such file or directory ls -al samples/bpf/../../tools/testing/selftests/bpf/ ls: cannot access 'samples/bpf/../../tools/testing/selftests/bpf/': No such file or directory There is no samples/bpf/../../tools/testing/selftests/bpf/ causing a compilation error. This commit add a "make -p" before build files in samples/bpf/../../tools/testing/selftests/bpf/ to handle the issue. Signed-off-by: Hui Zhu <teawaterz@xxxxxxxxxxxxxxxxx> --- samples/bpf/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index aeebf5d12f32..5b940eedf2e8 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -262,6 +262,7 @@ clean: $(LIBBPF): FORCE # Fix up variables inherited from Kbuild that tools/ build system won't like + mkdir -p $(obj)/../../tools/testing/selftests/bpf/ $(MAKE) -C $(dir $@) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \ LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ O= -- 2.17.1
