linux-kernel - Re: [PATCH 2/2] kbuild: remove cc-option test of -ffreestanding

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Date:   Fri, 26 Jun 2020 13:22:32 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, clang-built-linux@...glegroups.com,
        x86@...nel.org, linux-efi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] kbuild: remove cc-option test of -ffreestanding

On Sat, Jun 27, 2020 at 03:59:13AM +0900, Masahiro Yamada wrote:
> Some Makefiles already pass -ffreestanding unconditionally.
> For example, arch/arm64/lib/Makefile, arch/x86/purgatory/Makefile.
> No problem report so far about hard-coding this option. So, we can
> assume all supported compilers know -ffreestanding.
> 
> I confirmed GCC 4.8 and Clang manuals document this option.
> 
> Get rid of cc-option from -ffreestanding.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook