linux-kernel - [PATCH] bpftool, selftests/hid/bpf: fix 29 clang warnings

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Date: Sun,  5 May 2024 14:56:36 -0700
From: John Hubbard <jhubbard@...dia.com>
To: Shuah Khan <shuah@...nel.org>
Cc: Jiri Kosina <jikos@...nel.org>,
	Benjamin Tissoires <bentiss@...nel.org>,
	Justin Stitt <justinstitt@...gle.com>,
	Peter Hutterer <peter.hutterer@...-t.net>,
	Jason Gerecke <jason.gerecke@...om.com>,
	Joshua Dickens <joshua@...hua-dickens.com>,
	Quentin Monnet <qmo@...nel.org>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Eduard Zingerman <eddyz87@...il.com>,
	Song Liu <song@...nel.org>,
	Yonghong Song <yonghong.song@...ux.dev>,
	John Fastabend <john.fastabend@...il.com>,
	KP Singh <kpsingh@...nel.org>,
	Stanislav Fomichev <sdf@...gle.com>,
	Hao Luo <haoluo@...gle.com>,
	Jiri Olsa <jolsa@...nel.org>,
	bpf@...r.kernel.org,
	linux-input@...r.kernel.org,
	Valentin Obst <kernel@...entinobst.de>,
	linux-kselftest@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	llvm@...ts.linux.dev,
	John Hubbard <jhubbard@...dia.com>
Subject: [PATCH] bpftool, selftests/hid/bpf: fix 29 clang warnings

When building either tools/bpf/bpftool, or tools/testing/selftests/hid,
(the same Makefile is used for these), clang generates many instances of
a warning that is useless here:

    "clang: warning: -lLLVM-17: 'linker' input unused"

Silence this in both locations, by disabling that warning when building
with clang.

Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 tools/bpf/bpftool/Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
index e9154ace80ff..c7457921d136 100644
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile
@@ -133,6 +133,10 @@ CFLAGS += -DUSE_LIBCAP
 LIBS += -lcap
 endif
 
+ifneq ($(LLVM),)
+    CFLAGS += -Wno-unused-command-line-argument
+endif
+
 include $(wildcard $(OUTPUT)*.d)
 
 all: $(OUTPUT)bpftool

base-commit: f462ae0edd3703edd6f22fe41d336369c38b884b
prerequisite-patch-id: b901ece2a5b78503e2fb5480f20e304d36a0ea27
-- 
2.45.0