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From: Arnd Bergmann <arnd@kernel.org>
To: Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Nathan Chancellor <natechancellor@gmail.com>,
	Nick Desaulniers <ndesaulniers@google.com>,
	linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
	clang-built-linux@googlegroups.com
Subject: [PATCH 2/2] Makefile.extrawarn: limit -Wnested-externs to clang
Date: Mon, 26 Oct 2020 23:03:14 +0100	[thread overview]
Message-ID: <20201026220331.3896226-2-arnd@kernel.org> (raw)
In-Reply-To: <20201026220331.3896226-1-arnd@kernel.org>

From: Arnd Bergmann <arnd@arndb.de>

The -Wnested-externs warning has become useless with gcc, since
this warns every time that BUILD_BUG_ON() or similar macros
are used.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 scripts/Makefile.extrawarn | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 6baee1200615..9406f752e355 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -61,7 +61,10 @@ endif
 ifneq ($(findstring 2, $(KBUILD_EXTRA_WARN)),)
 
 KBUILD_CFLAGS += -Wdisabled-optimization
+ifdef CONFIG_CC_IS_CLANG
 KBUILD_CFLAGS += -Wnested-externs
+endif
+
 KBUILD_CFLAGS += -Wshadow
 KBUILD_CFLAGS += $(call cc-option, -Wlogical-op)
 KBUILD_CFLAGS += -Wmissing-field-initializers
-- 
2.27.0


  reply	other threads:[~2020-10-26 22:03 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-26 22:03 [PATCH 1/2] Makefile.extrawarn: move -Wcast-align to W=3 Arnd Bergmann
2020-10-26 22:03 ` Arnd Bergmann [this message]
2020-10-27  1:48   ` [PATCH 2/2] Makefile.extrawarn: limit -Wnested-externs to clang Nathan Chancellor
2020-10-27  4:32     ` Nathan Chancellor
2020-11-23 12:00       ` Masahiro Yamada
2020-10-27  1:42 ` [PATCH 1/2] Makefile.extrawarn: move -Wcast-align to W=3 Nathan Chancellor
2020-11-23 11:17   ` Masahiro Yamada
2020-11-24 15:42     ` Arnd Bergmann

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