linux-kernel - Re: [PATCH] gcc-plugins: fix gcc 11 indigestion with plugins...

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Message-ID: <CAMuHMdU1YSODgh_T5RxqUqorveAQiy_-gQbF_SwMEj7gvG25qw@mail.gmail.com>
Date:   Mon, 11 Jan 2021 10:47:23 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Valdis Klētnieks <valdis.kletnieks@...edu>,
        linux-hardening@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH] gcc-plugins: fix gcc 11 indigestion with plugins...

Hi Kees, Valdis,

On Thu, Jan 7, 2021 at 12:11 AM Kees Cook <keescook@...omium.org> wrote:
> On Sat, 26 Dec 2020 13:21:58 -0500, Valdis Klētnieks wrote:
> > Fedora Rawhide has started including gcc 11,and the g++ compiler
> > throws a wobbly when it hits scripts/gcc-plugins:
> >
> >   HOSTCXX scripts/gcc-plugins/latent_entropy_plugin.so
> > In file included from /usr/include/c++/11/type_traits:35,
> >                  from /usr/lib/gcc/x86_64-redhat-linux/11/plugin/include/system.h:244,
> >                  from /usr/lib/gcc/x86_64-redhat-linux/11/plugin/include/gcc-plugin.h:28,
> >                  from scripts/gcc-plugins/gcc-common.h:7,
> >                  from scripts/gcc-plugins/latent_entropy_plugin.c:78:
> > /usr/include/c++/11/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO
> >  C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
> >    32 | #error This file requires compiler and library support \
> >
> > [...]
>
> Applied to for-linus/gcc-plugins, thanks!
>
> [1/1] gcc-plugins: fix gcc 11 indigestion with plugins...
>       https://git.kernel.org/kees/c/67a5a6801305

I guess this is the cause of the new "warning: invalid suffix on
literal; C++11 requires a space between literal and string macro
[-Wliteral-suffix]" with gcc 4.9 or 5.4?

https://lore.kernel.org/lkml/20210111094343.3948339-1-geert@linux-m68k.org

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds