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Date: Tue, 12 Apr 2016 12:46:36 -0700
From: Kees Cook <>
To: David Brown <>, Jeff Law <>
Cc: Emese Revfy <>, Masahiro Yamada <>, 
	Michal Marek <>, linux-kbuild <>, 
	PaX Team <>, Brad Spengler <>, 
	"" <>, 
	Rasmus Villemoes <>, Fengguang Wu <>, 
	Dmitry Vyukov <>, LKML <>
Subject: Re: [PATCH v6 0/6] Introduce GCC plugin infrastructure

On Tue, Apr 12, 2016 at 11:41 AM, David Brown <> wrote:
> On Tue, Apr 12, 2016 at 11:27:52AM -0700, Kees Cook wrote:
>> Awesome! Thanks for testing this. I still need to finish getting my
>> arm64 environment built...
> I've been using:
> for most stuff.
>> Do you happen to know if there's already a gcc bug open for the make
>> install problem?
> Linaro toolchain bug:
> Patch to fix it
> It is supposed to be included in the linaro 5.3-2016.03 snapshot.
> I've pinged Christophe to see if I can get any insight into when that
> will be available.

Looks like it's in the upstream tree:;a=commitdiff;h=bfe972081c3c75019fa5a6e883dcbeb5e03eea18

I'm not sure how GCC does bug fix releases. Is this going to be in 5.4
or 5.3.1? (Is there such a thing as 5.3.1 planned?) I've CCed Jeff in
case he's got a moment to peek at this.

> It is kind of nice to see that when it fails, it prints a helpful
> message, though:
>  scripts/Makefile.gcc-plugins:22: *** error, your gcc installation does not
> support plugins, perhaps the necessary headers are missing?.  Stop.
> I think it is OK to include this, even with the patches still bubbling
> through gcc releases.  It prints a helpful message when it doesn't
> work, and is only going to be selected if specifically requested.

Yeah, absolutely. It works on the other architectures, and will soon
work on arm64 too.


Kees Cook
Chrome OS & Brillo Security

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