linux-kernel - Re: [PATCH 1/4] Adds -Wshadow=local on KBUILD

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Message-ID: <20181017083126.GB22535@zn.tnic>
Date:   Wed, 17 Oct 2018 10:31:26 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Leonardo Brás <leobras.c@...il.com>,
        lkcamp@...ts.libreplanetbr.org, willy6545@...il.com,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, X86 ML <x86@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH 1/4] Adds -Wshadow=local on KBUILD_HOSTCFLAGS

On Wed, Oct 17, 2018 at 05:21:01PM +0900, Masahiro Yamada wrote:
> scripts/Makefile.extrawarn provides options for the target compiler (CC),
> whereas this patch adds -Wshadow=local for the host compiler (HOSTCC).

Aha, this wants to fix shadowing for the host tools, ok.

Next question: why not -Wshadow simply?

Also, -Wshadow for the target compiler is an extra warning (W=2). Why is
it enabled by default here?

-- 
Regards/Gruss,
    Boris.

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