prog_tests/resolve_btfids.c looks for "resolve_btfids.test.o.BTF" relative to the running test_progs binary. resolve_btfids always writes .BTF next to the object it processes, so building resolve_btfids.test.o also produces resolve_btfids.test.o.BTF in the build output directory as a side effect. INSTALL_RULE never carries it over: it is not part of TEST_FILES, TEST_GEN_FILES or TRUNNER_EXTRA_FILES, and it is not copied by the *.bpf.o rsync used for TEST_INST_SUBDIRS. After "make install", every flavor of test_progs, including the default one, fails with "Failed to load BTF from resolve_btfids.test.o.BTF", even though the file built fine and BTF ID resolution itself works correctly. Install it next to the rest of the per-flavor build output, using an explicit rsync in INSTALL_RULE like the one already used for bpftool. Fixes: 522397d05e7d ("resolve_btfids: Change in-place update with raw binary output") Signed-off-by: Ricardo B. Marlière --- tools/testing/selftests/bpf/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 47911c9b4977..7260d672acf7 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -1057,10 +1057,11 @@ override define INSTALL_RULE $(DEFAULT_INSTALL_RULE) @mkdir -p $(INSTALL_PATH)/tools/sbin @rsync -a $(if $(PERMISSIVE),--ignore-missing-args) $(TRUNNER_BPFTOOL) $(INSTALL_PATH)/tools/sbin/ + @rsync -a $(if $(PERMISSIVE),--ignore-missing-args) $(OUTPUT)/resolve_btfids.test.o.BTF $(INSTALL_PATH)/ @for DIR in $(TEST_INST_SUBDIRS); do \ mkdir -p $(INSTALL_PATH)/$$DIR; \ rsync -a $(if $(PERMISSIVE),--ignore-missing-args) \ - $(OUTPUT)/$$DIR/*.bpf.o \ + $(OUTPUT)/$$DIR/*.bpf.o $(OUTPUT)/$$DIR/resolve_btfids.test.o.BTF \ $(INSTALL_PATH)/$$DIR; \ done endef -- 2.54.0