linux-kernel - Re: unused-variable warning is getting disabled with clang

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Date:   Thu, 7 Dec 2017 07:26:02 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Sodagudi Prasad <psodagud@...eaurora.org>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <mmarek@...e.com>,
        Greg Hackmann <ghackmann@...gle.com>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: unused-variable warning is getting disabled with clang

On Wed, Dec 06, 2017 at 01:24:51PM -0800, Sodagudi Prasad wrote:
> 
> Hi All,
> 
> When kernel compiled with clang, following line is disabling the
> unused-variable warning. This is not the case with gcc.
> KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
> 
> Are there any specific reasons for disabling unused-variable with clang?

Try it and see why it is disabled :)