linux-kernel - Re: linux-next: Tree for Aug 20 (Wno-alloc-size-larger-than)

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Message-ID: <20210824115859.187f272f@canb.auug.org.au>
Date:   Tue, 24 Aug 2021 11:58:59 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nathan Chancellor <nathan@...nel.org>
Subject: Re: linux-next: Tree for Aug 20 (Wno-alloc-size-larger-than)

Hi Randy,

On Mon, 23 Aug 2021 18:24:44 -0700 Randy Dunlap <rdunlap@...radead.org> wrote:
>
> This is just weird. What I am seeing is that for every source file
> where gcc emits a warning: it then follows that up with this
> >> cc1: warning: unrecognized command line option '-Wno-alloc-size-larger-than'  

I see the same, as well as:

<stdin>:1515:2: warning: #warning syscall clone3 not implemented [-Wcpp]
cc1: warning: unrecognized command line option '-Wno-alloc-size-larger-than'

But only on my gcc 7.3.1 builds (the rest are gcc 10).

> Smells like a gcc bug to me.

Yes

Also noted here: https://github.com/DynamoRIO/drmemory/issues/2099 (second comment)
-- 
Cheers,
Stephen Rothwell

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