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Date:   Fri, 18 Dec 2020 20:33:37 +0000
From:   Jon Hunter <>
To:     Linus Torvalds <>
CC:     Marek Szyprowski <>,
        Masahiro Yamada <>,
        Linux Kbuild mailing list <>,
        Kees Cook <>,
        "Emese Revfy" <>,
        "Nathan Chancellor" <>,
        Nick Desaulniers <>,
        clang-built-linux <>,
        Linux Kernel Mailing List <>,
        linux-tegra <>
Subject: Re: [PATCH] gcc-plugins: simplify GCC plugin-dev capability test

On 18/12/2020 17:54, Linus Torvalds wrote:
> On Fri, Dec 18, 2020 at 7:33 AM Jon Hunter <> wrote:
>> However, if you are saying that this is a problem/bug with our builders,
>> then of course we will have to get this fixed.
> This seems to be a package dependency problem with the gcc plugins -
> they clearly want libgmp, but apparently the package hasn't specified
> that dependency.
> If this turns out to be a big problem, I guess we can't simplify the
> plugin check after all.
> We historically just disabled gcc-plugins if that header didn't build,
> which obviously meant that it "worked" for people, but it also means
> that clearly the coverage can't have been as good as it could/should
> be.
> So if it's as simple as just installing the GNU multiprecision
> libraries ("gmp-devel" on most rpm-based systems, "libgmp-dev" on most
> debian systems), then I think that's the right thing to do. You'll get
> a working build again, and equally importantly, your build servers
> will actually do a better job of covering the different build options.

Thanks. I have reported this issue to the team that administers the
builders. So hopefully, they will install the necessary packages for us



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