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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Daniel Bristot de Oliveira <bristot@kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>
Subject: Re: [PATCH] Makefile: use -Wno-main in the full kernel tree
Date: Mon, 16 Aug 2021 14:33:28 -1000	[thread overview]
Message-ID: <CAHk-=wgnvC=Tyejg_ts1O7yZYRxAgS+mxStCWM+PcyFPnaw1sw@mail.gmail.com> (raw)
In-Reply-To: <CAHk-=wj4chmL3TUdXHhAV+eU-YVNj-ZtZBjNJEFBzTnPMP3_bA@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 420 bytes --]

On Fri, Aug 13, 2021 at 2:01 PM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> From a quick google, it seems like '-Wmain' means something else for
> clang. But it is probably ok.

So the warnings that clang gives with -Wmain seem to be much more reasonable.

Which makes me think that the '-Wno-main' thing would likely be better
as a gcc-only thing.

Maybe something like this instead?

              Linus

[-- Attachment #2: patch.diff --]
[-- Type: text/x-patch, Size: 539 bytes --]

 Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Makefile b/Makefile
index c19d1638da25..a33fba083df7 100644
--- a/Makefile
+++ b/Makefile
@@ -803,6 +803,8 @@ else
 # Disabled for clang while comment to attribute conversion happens and
 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=5,)
+# gcc inanely warns about local variables called 'main'
+KBUILD_CFLAGS += -Wno-main
 endif
 
 # These warnings generated too much noise in a regular build.

  parent reply	other threads:[~2021-08-17  0:33 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-13 22:41 Randy Dunlap
2021-08-14  0:01 ` Linus Torvalds
2021-08-14  0:29   ` Randy Dunlap
2021-08-17  0:33   ` Linus Torvalds [this message]
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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