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From: Randy Dunlap <rdunlap@infradead.org>
To: linux-kernel@vger.kernel.org
Cc: Randy Dunlap <rdunlap@infradead.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Daniel Bristot de Oliveira <bristot@kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	linux-kbuild@vger.kernel.org
Subject: [PATCH] Makefile: use -Wno-main in the full kernel tree
Date: Fri, 13 Aug 2021 15:41:31 -0700	[thread overview]
Message-ID: <20210813224131.25803-1-rdunlap@infradead.org> (raw)

When using gcc (SUSE Linux) 7.5.0 (on openSUSE 15.3), I see a
build warning:

../kernel/trace/trace_osnoise.c: In function 'start_kthread':
../kernel/trace/trace_osnoise.c:1461:8: warning: 'main' is usually a function [-Wmain]
  void *main = osnoise_main;
        ^~~~

Quieten that warning by using "-Wno-main". It's OK to use "main" as a
declaration name in the kernel.

Build-tested on most ARCHes.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: linux-kbuild@vger.kernel.org
---
 Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-next-20210812.orig/Makefile
+++ linux-next-20210812/Makefile
@@ -522,7 +522,7 @@ KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-P
 KBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
 		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
 		   -Werror=implicit-function-declaration -Werror=implicit-int \
-		   -Werror=return-type -Wno-format-security \
+		   -Werror=return-type -Wno-format-security -Wno-main \
 		   -std=gnu89
 KBUILD_CPPFLAGS := -D__KERNEL__
 KBUILD_RUST_TARGET := $(srctree)/arch/$(SRCARCH)/rust/target.json

             reply	other threads:[~2021-08-13 22:41 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-13 22:41 Randy Dunlap [this message]
2021-08-14  0:01 ` Linus Torvalds
2021-08-14  0:29   ` Randy Dunlap
2021-08-17  0:33   ` Linus Torvalds
2021-08-17  0:38     ` Linus Torvalds
2021-08-17  1:01       ` Randy Dunlap
2021-08-17  1:31         ` Linus Torvalds
2021-08-17  2:05           ` Steven Rostedt
2021-08-21 23:26     ` Randy Dunlap
2021-09-07 22:42     ` Randy Dunlap
2021-08-16 15:08 ` Steven Rostedt

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