llvm.lists.linux.dev archive mirror
 help / color / mirror / Atom feed
From: Nathan Chancellor <nathan@kernel.org>
To: masahiroy@kernel.org, ndesaulniers@google.com
Cc: nicolas@fjasle.eu, trix@redhat.com, linux-kbuild@vger.kernel.org,
	llvm@lists.linux.dev, Nathan Chancellor <nathan@kernel.org>,
	kernel test robot <lkp@intel.com>
Subject: [PATCH 13/14] kbuild: Turn a couple more of clang's unused option warnings into errors
Date: Wed, 04 Jan 2023 12:54:30 -0700	[thread overview]
Message-ID: <20221228-drop-qunused-arguments-v1-13-658cbc8fc592@kernel.org> (raw)
In-Reply-To: <20221228-drop-qunused-arguments-v1-0-658cbc8fc592@kernel.org>

Currently, these warnings are hidden with -Qunused-arguments in
KBUILD_CPPFLAGS. Once that option is removed, these warnings should be
turned into hard errors to make unconditionally added but unsupported
flags for the current compilation mode or target obvious due to a failed
build; otherwise, the warnings might just be ignored if the build log is
not checked.

Link: https://github.com/ClangBuiltLinux/linux/issues/1587
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
 scripts/Makefile.clang | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scripts/Makefile.clang b/scripts/Makefile.clang
index 87285b76adb2..70b354fa1cb4 100644
--- a/scripts/Makefile.clang
+++ b/scripts/Makefile.clang
@@ -36,6 +36,8 @@ endif
 # so they can be implemented or wrapped in cc-option.
 CLANG_FLAGS	+= -Werror=unknown-warning-option
 CLANG_FLAGS	+= -Werror=ignored-optimization-argument
+CLANG_FLAGS	+= -Werror=option-ignored
+CLANG_FLAGS	+= -Werror=unused-command-line-argument
 KBUILD_CFLAGS	+= $(CLANG_FLAGS)
 KBUILD_AFLAGS	+= $(CLANG_FLAGS)
 export CLANG_FLAGS

-- 
2.39.0

  parent reply	other threads:[~2023-01-04 19:55 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-04 19:54 [PATCH 00/14] Remove clang's -Qunused-arguments from KBUILD_CPPFLAGS Nathan Chancellor
2023-01-04 19:54 ` [PATCH 01/14] x86/boot/compressed: prefer cc-option for CFLAGS additions Nathan Chancellor
2023-01-04 19:54 ` [PATCH 02/14] MIPS: Always use -Wa,-msoft-float and eliminate GAS_HAS_SET_HARDFLOAT Nathan Chancellor
2023-01-09 21:18   ` Nick Desaulniers
2023-01-10  7:45   ` Philippe Mathieu-Daudé
2023-01-10  8:30   ` Thomas Bogendoerfer
2023-01-04 19:54 ` [PATCH 03/14] MIPS: Prefer cc-option for additions to cflags Nathan Chancellor
2023-01-09 21:21   ` Nick Desaulniers
2023-01-10  7:42   ` Philippe Mathieu-Daudé
2023-01-10  8:30   ` Thomas Bogendoerfer
2023-01-04 19:54 ` [PATCH 04/14] kbuild: Update assembler calls to use proper flags and language target Nathan Chancellor
2023-01-04 19:54 ` [PATCH 05/14] powerpc: Remove linker flag from KBUILD_AFLAGS Nathan Chancellor
2023-01-09 21:24   ` Nick Desaulniers
2023-01-04 19:54 ` [PATCH 06/14] powerpc/vdso: Remove unused '-s' flag from ASFLAGS Nathan Chancellor
2023-01-09 21:58   ` Nick Desaulniers
2023-01-09 22:15     ` Nathan Chancellor
2023-01-09 22:21       ` Nick Desaulniers
2023-01-09 22:23     ` Segher Boessenkool
2023-01-09 22:37       ` Nathan Chancellor
2023-01-09 22:47         ` Segher Boessenkool
2023-01-09 23:14       ` Nick Desaulniers
2023-01-10  0:51         ` Nathan Chancellor
2023-01-10 11:45           ` Segher Boessenkool
2023-01-10 15:02             ` Nathan Chancellor
     [not found]     ` <20230109222337.GM25951__25255.3859770828$1673303520$gmane$org@gate.crashing.org>
2023-01-10  0:22       ` Andreas Schwab
2023-01-10  0:43         ` Segher Boessenkool
2023-01-04 19:54 ` [PATCH 07/14] powerpc/vdso: Improve linker flags Nathan Chancellor
2023-01-09 22:08   ` Nick Desaulniers
2023-01-09 22:15     ` Nathan Chancellor
2023-01-04 19:54 ` [PATCH 08/14] powerpc/vdso: Remove an unsupported flag from vgettimeofday-32.o with clang Nathan Chancellor
2023-01-09 22:12   ` Nick Desaulniers
2023-01-09 22:38     ` Nathan Chancellor
2023-01-09 23:16       ` Nick Desaulniers
2023-01-04 19:54 ` [PATCH 09/14] s390/vdso: Drop unused '-s' flag from KBUILD_AFLAGS_64 Nathan Chancellor
2023-01-05  7:27   ` Sven Schnelle
2023-01-04 19:54 ` [PATCH 10/14] s390/vdso: Drop '-shared' from KBUILD_CFLAGS_64 Nathan Chancellor
2023-01-05  7:31   ` Sven Schnelle
2023-01-04 19:54 ` [PATCH 11/14] s390/purgatory: Remove unused '-MD' and unnecessary '-c' flags Nathan Chancellor
2023-01-05  7:33   ` Sven Schnelle
2023-01-04 19:54 ` [PATCH 12/14] drm/amd/display: Do not add '-mhard-float' to dml_ccflags for clang Nathan Chancellor
2023-01-05 14:21   ` Alex Deucher
2023-01-04 19:54 ` Nathan Chancellor [this message]
2023-01-09 22:15   ` [PATCH 13/14] kbuild: Turn a couple more of clang's unused option warnings into errors Nick Desaulniers
2023-01-04 19:54 ` [PATCH 14/14] kbuild: Stop using '-Qunused-arguments' with clang Nathan Chancellor
2023-01-09 22:17   ` Nick Desaulniers
2023-01-05  8:00 ` [PATCH 00/14] Remove clang's -Qunused-arguments from KBUILD_CPPFLAGS Heiko Carstens

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20221228-drop-qunused-arguments-v1-13-658cbc8fc592@kernel.org \
    --to=nathan@kernel.org \
    --cc=linux-kbuild@vger.kernel.org \
    --cc=lkp@intel.com \
    --cc=llvm@lists.linux.dev \
    --cc=masahiroy@kernel.org \
    --cc=ndesaulniers@google.com \
    --cc=nicolas@fjasle.eu \
    --cc=trix@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).