linux-kernel - Re: Build failure with GCC 15 (-std=gnu23)

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Message-ID: <202501201615.F606516@keescook>
Date: Mon, 20 Jan 2025 16:16:30 -0800
From: Kees Cook <kees@...nel.org>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: Nathan Chancellor <nathan@...nel.org>, Sam James <sam@...too.org>,
	Kostadin Shishmanov <kostadinshishmanov@...tonmail.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	arnd@...db.de, linux-kbuild@...r.kernel.org
Subject: Re: Build failure with GCC 15 (-std=gnu23)

On Wed, Nov 20, 2024 at 03:28:35AM +0900, Masahiro Yamada wrote:
> Some Makefile overriding KBUILD_CFLAGS would forget to add
> $(CSTD_FLAG), for the same reason as they would forget to add
> -std=gnu11.

But at least we'd have 1 place to change when we changed the std level.

FWIW, I just ran into this build failure too testing GCC 15 from their
ToT. Both EFI and compressed Makefiles needed it in my build.

-- 
Kees Cook