[PATCH bpf-next v5 05/11] selftests/bpf: Make skeleton headers order-only prerequisites of .test.d

Ricardo B. Marlière
2026-04-15T20:59:49Z

The .test.d dependency files are generated by the C preprocessor and list
the headers each test file actually #includes. Skeleton headers appear in
those generated lists, so the .test.o -> .skel.h dependency is already
tracked by the .d file content.

Making skeletons order-only prerequisites of .test.d means that a missing
or skipped skeleton does not prevent .test.d generation, and regenerating a
skeleton does not force .test.d to be recreated. This avoids unnecessary
recompilation and, more importantly, avoids build errors when a skeleton
was intentionally skipped due to a BPF compilation failure.

Signed-off-by: Ricardo B. Marlière <rbm@suse.com>
---
tools/testing/selftests/bpf/Makefile | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 040617c01bbb..3c9d61023414 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -713,11 +713,11 @@ $(TRUNNER_TEST_OBJS): $(TRUNNER_OUTPUT)/%.test.o: \
$(TRUNNER_TEST_OBJS:.o=.d): $(TRUNNER_OUTPUT)/%.test.d: \
$(TRUNNER_TESTS_DIR)/%.c \
$(TRUNNER_EXTRA_HDRS) \
+ $$(BPFOBJ) | $(TRUNNER_OUTPUT) \
$(TRUNNER_BPF_SKELS) \
$(TRUNNER_BPF_LSKELS) \
$(TRUNNER_BPF_LSKELS_SIGNED) \
- $(TRUNNER_BPF_SKELS_LINKED) \
- $$(BPFOBJ) | $(TRUNNER_OUTPUT)
+ $(TRUNNER_BPF_SKELS_LINKED)

ifeq ($(filter clean docs-clean emit_tests,$(MAKECMDGOALS)),)
include $(wildcard $(TRUNNER_TEST_OBJS:.o=.d))

--
2.53.0