linux-kernel - Re: [GIT PULL] gcc-plugins updates for v5.11-rc1

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Message-ID: <202012161221.18C0E3B5CC@keescook>
Date:   Wed, 16 Dec 2020 12:23:05 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Masahiro Yamada <masahiroy@...nel.org>
Subject: Re: [GIT PULL] gcc-plugins updates for v5.11-rc1

On Wed, Dec 16, 2020 at 11:24:04AM -0800, Linus Torvalds wrote:
> On Tue, Dec 15, 2020 at 12:15 PM Kees Cook <keescook@...omium.org> wrote:
> >
> > Please pull these gcc-plugins updates for v5.11-rc1.
> 
> Hmm, I pulled this and then did an allmodconfig build.
> 
> I expected that to be a full rebuild, since the plugins got
> recompiled, but it turned out to just take 16 seconds because it only
> compiled the plugins, not any of the object files.

Hmm. Yeah, that's a bug. I think that's an existing bug, though. I feel
like I scratched my head on that too. I will see if there is a sensible
way to have Kbuild "notice" that -- I hope there's an easier way to
invalidate all object files instead of adding all the plugins as a dep
to all .o builds. O_o

Thanks for the heads-up!

-- 
Kees Cook