From: Nathan Chancellor <nathan@kernel.org>
To: masahiroy@kernel.org
Cc: ndesaulniers@google.com, nicolas@fjasle.eu, trix@redhat.com,
linux-kbuild@vger.kernel.org, llvm@lists.linux.dev,
Nathan Chancellor <nathan@kernel.org>,
Heiko Carstens <hca@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
linux-s390@vger.kernel.org
Subject: [PATCH v2 11/14] s390/purgatory: Remove unused '-MD' and unnecessary '-c' flags
Date: Wed, 11 Jan 2023 20:05:08 -0700 [thread overview]
Message-ID: <20221228-drop-qunused-arguments-v2-11-9adbddd20d86@kernel.org> (raw)
In-Reply-To: <20221228-drop-qunused-arguments-v2-0-9adbddd20d86@kernel.org>
When clang's -Qunused-arguments is dropped from KBUILD_CPPFLAGS, it
warns while building objects in the purgatory folder:
clang-16: error: argument unused during compilation: '-MD' [-Werror,-Wunused-command-line-argument]
'-MMD' is always passed to the preprocessor via c_flags, even when
KBUILD_CFLAGS is overridden in a folder, so clang complains the addition
of '-MD' will be unused. Remove '-MD' to clear up this warning, as it is
unnecessary with '-MMD'.
Additionally, '-c' is also unnecessary, remove it while in the area.
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
---
Cc: linux-s390@vger.kernel.org
---
arch/s390/purgatory/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/purgatory/Makefile b/arch/s390/purgatory/Makefile
index d237bc6841cb..32573b4f9bd2 100644
--- a/arch/s390/purgatory/Makefile
+++ b/arch/s390/purgatory/Makefile
@@ -24,7 +24,7 @@ KCSAN_SANITIZE := n
KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes
KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare
KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding
-KBUILD_CFLAGS += -c -MD -Os -m64 -msoft-float -fno-common
+KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common
KBUILD_CFLAGS += -fno-stack-protector
KBUILD_CFLAGS += $(CLANG_FLAGS)
KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
--
2.39.0
next prev parent reply other threads:[~2023-01-12 3:05 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-12 3:04 [PATCH v2 00/14] Remove clang's -Qunused-arguments from KBUILD_CPPFLAGS Nathan Chancellor
2023-01-12 3:04 ` Nathan Chancellor
2023-01-12 3:04 ` Nathan Chancellor
2023-01-12 3:04 ` [PATCH v2 01/14] x86/boot/compressed: prefer cc-option for CFLAGS additions Nathan Chancellor
2023-01-12 3:04 ` [PATCH v2 02/14] MIPS: Always use -Wa,-msoft-float and eliminate GAS_HAS_SET_HARDFLOAT Nathan Chancellor
2023-01-12 3:05 ` [PATCH v2 03/14] MIPS: Prefer cc-option for additions to cflags Nathan Chancellor
2023-01-12 3:05 ` [PATCH v2 04/14] kbuild: Update assembler calls to use proper flags and language target Nathan Chancellor
2023-01-12 3:05 ` [PATCH v2 05/14] powerpc: Remove linker flag from KBUILD_AFLAGS Nathan Chancellor
2023-01-12 3:05 ` Nathan Chancellor
2023-01-25 4:11 ` Michael Ellerman
2023-01-25 4:11 ` Michael Ellerman
2023-01-26 1:29 ` Masahiro Yamada
2023-01-26 1:29 ` Masahiro Yamada
2023-01-26 2:07 ` Nathan Chancellor
2023-01-26 2:07 ` Nathan Chancellor
2023-01-26 4:22 ` Masahiro Yamada
2023-01-26 4:22 ` Masahiro Yamada
2023-01-26 10:05 ` Michael Ellerman
2023-01-26 10:05 ` Michael Ellerman
2023-01-12 3:05 ` [PATCH v2 06/14] powerpc/vdso: Remove unused '-s' flag from ASFLAGS Nathan Chancellor
2023-01-12 3:05 ` Nathan Chancellor
2023-01-25 4:12 ` Michael Ellerman
2023-01-25 4:12 ` Michael Ellerman
2023-01-12 3:05 ` [PATCH v2 07/14] powerpc/vdso: Improve linker flags Nathan Chancellor
2023-01-12 3:05 ` Nathan Chancellor
2023-01-12 18:02 ` Sedat Dilek
2023-01-12 18:02 ` Sedat Dilek
2023-01-12 18:21 ` Nathan Chancellor
2023-01-12 18:21 ` Nathan Chancellor
2023-01-12 18:47 ` Sedat Dilek
2023-01-12 18:47 ` Sedat Dilek
2023-01-22 17:27 ` Masahiro Yamada
2023-01-22 17:27 ` Masahiro Yamada
2023-01-22 18:01 ` Nathan Chancellor
2023-01-22 18:01 ` Nathan Chancellor
2023-01-23 15:07 ` Segher Boessenkool
2023-01-23 15:07 ` Segher Boessenkool
2023-01-24 16:14 ` Nathan Chancellor
2023-01-24 16:14 ` Nathan Chancellor
2023-01-24 16:30 ` Segher Boessenkool
2023-01-24 16:30 ` Segher Boessenkool
2023-01-12 3:05 ` [PATCH v2 08/14] powerpc/vdso: Remove an unsupported flag from vgettimeofday-32.o with clang Nathan Chancellor
2023-01-12 3:05 ` Nathan Chancellor
2023-01-12 3:05 ` [PATCH v2 09/14] s390/vdso: Drop unused '-s' flag from KBUILD_AFLAGS_64 Nathan Chancellor
2023-01-12 3:05 ` [PATCH v2 10/14] s390/vdso: Drop '-shared' from KBUILD_CFLAGS_64 Nathan Chancellor
2023-01-12 3:05 ` Nathan Chancellor [this message]
2023-01-12 3:05 ` [PATCH v2 12/14] drm/amd/display: Do not add '-mhard-float' to dml_ccflags for clang Nathan Chancellor
2023-01-12 3:05 ` Nathan Chancellor
2023-01-12 3:05 ` [PATCH v2 13/14] kbuild: Turn a couple more of clang's unused option warnings into errors Nathan Chancellor
2023-01-12 3:05 ` [PATCH v2 14/14] kbuild: Stop using '-Qunused-arguments' with clang Nathan Chancellor
2023-01-22 17:28 ` [PATCH v2 00/14] Remove clang's -Qunused-arguments from KBUILD_CPPFLAGS Masahiro Yamada
2023-01-22 17:28 ` Masahiro Yamada
2023-01-22 17:28 ` Masahiro Yamada
2023-01-23 13:58 ` Naresh Kamboju
2023-01-23 13:58 ` Naresh Kamboju
2023-01-23 13:58 ` Naresh Kamboju
2023-01-23 16:11 ` Nathan Chancellor
2023-01-23 16:11 ` Nathan Chancellor
2023-01-23 16:11 ` Nathan Chancellor
2023-01-24 15:29 ` Naresh Kamboju
2023-01-24 15:29 ` Naresh Kamboju
2023-01-24 15:29 ` Naresh Kamboju
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