From: Tiezhu Yang Date: Sat, 18 Oct 2025 08:28:15 +0000 (+0800) Subject: selftests/bpf: Silence unused-but-set build warnings X-Git-Tag: v6.19-rc1~171^2~86 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c67f4ae73798b6f9f41921b2dc81c0055f470e41;p=thirdparty%2Flinux.git selftests/bpf: Silence unused-but-set build warnings There are some set but not used build errors when compiling bpf selftests with the latest upstream mainline GCC, at the beginning add the attribute __maybe_unused for the variables, but it is better to just add the option -Wno-unused-but-set-variable to CFLAGS in Makefile to disable the errors instead of hacking the tests. tools/testing/selftests/bpf/map_tests/lpm_trie_map_basic_ops.c:229:36: error: variable ‘n_matches_after_delete’ set but not used [-Werror=unused-but-set-variable=] tools/testing/selftests/bpf/map_tests/lpm_trie_map_basic_ops.c:229:25: error: variable ‘n_matches’ set but not used [-Werror=unused-but-set-variable=] tools/testing/selftests/bpf/prog_tests/bpf_cookie.c:426:22: error: variable ‘j’ set but not used [-Werror=unused-but-set-variable=] tools/testing/selftests/bpf/prog_tests/find_vma.c:52:22: error: variable ‘j’ set but not used [-Werror=unused-but-set-variable=] tools/testing/selftests/bpf/prog_tests/perf_branches.c:67:22: error: variable ‘j’ set but not used [-Werror=unused-but-set-variable=] tools/testing/selftests/bpf/prog_tests/perf_link.c:15:22: error: variable ‘j’ set but not used [-Werror=unused-but-set-variable=] Signed-off-by: Tiezhu Yang Link: https://lore.kernel.org/r/20251018082815.20622-1-yangtiezhu@loongson.cn Signed-off-by: Alexei Starovoitov --- diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index f00587d4ede68..7437c325179e4 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -46,6 +46,7 @@ endif CFLAGS += -g $(OPT_FLAGS) -rdynamic -std=gnu11 \ -Wall -Werror -fno-omit-frame-pointer \ + -Wno-unused-but-set-variable \ $(GENFLAGS) $(SAN_CFLAGS) $(LIBELF_CFLAGS) \ -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) \ -I$(TOOLSINCDIR) -I$(TOOLSARCHINCDIR) -I$(APIDIR) -I$(OUTPUT)