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Date: Wed, 16 Mar 2016 16:41:36 +0900
From: Masahiro Yamada <>
To: Emese Revfy <>
Cc: Linux Kbuild mailing list <>,,,, Michal Marek <>,
        Kees Cook <>,
        Rasmus Villemoes <>,,
        Dmitry Vyukov <>,
        Linux Kernel Mailing List <>
Subject: Re: [PATCH v5 2/5] GCC plugin infrastructure

Hi Emese,

2016-03-15 5:52 GMT+09:00 Emese Revfy <>:
> On Fri, 11 Mar 2016 15:25:19 +0900
> Masahiro Yamada <> wrote:
>> Maybe scripts/gcc-plugins/ is better than tools/gcc ?
>> In the directory "scripts/", we have several tools used during
>> building the kernel image.
>> We have some optional programs in the directory "tools/", which are not used
>> for building the kernel image itself.
>> Please correct me if I am wrong.
> I think scripts isn't the right place because there are tools there which don't get used
> during the building of vmlinux (e.g., coccinelle, checkpatch).

No, this is not what I meant.

What I want to say is:
All the host tools used for building vmlinux should be located in the
directory "scripts/",
but the directory may also other host tools that are not used for
building vmlinux (such as checkpatch).

> The scripts name also doesn't describe gcc plugins well.

With my suggestion "scripts/gcc-plugins/",
the sub-directory name describes it very well.

> Plugins take part in the image building process
> in a different way than these tools and scripts do.
> Since there doesn't seen to be a good place for compiler plugins, maybe we should create a new toplevel directory
> called "build". Compiler plugins and other existing build tools could live there. What do you think?

In my understanding, they are plug-in'ed into the cross-compiler that
compiles vmlinux.

If so, GCC plugins should be happy in "scripts/"
because Kbuild descends into "scripts/" before building any objects for vmlinux.

Best Regards
Masahiro Yamada

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