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Date:   Thu, 18 Mar 2021 07:55:35 -0400
From:   "Valdis Klētnieks" <>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     Kees Cook <>,
        Josh Poimboeuf <>,
        Geert Uytterhoeven <>,
        "" <>,
        Linux Kernel Mailing List <>
Subject: Re: [PATCH RESEND] gcc-plugins: avoid errors with -std=gnu++11 on old gcc

On Thu, 18 Mar 2021 11:41:29 -0000, David Laight said:

> That gcc bug just implies you need a space after "xxx".
> That is easily fixable in the sources.

It's not quite that simple.

   In file included from /usr/lib/gcc/x86_64-linux-gnu/5/plugin/include/tm.h:27,
                    from /usr/lib/gcc/x86_64-linux-gnu/5/plugin/include/gcc-plugin.h:31,
                    from /usr/lib/gcc/x86_64-linux-gnu/5/plugin/include/plugin.h:23,
                    from scripts/gcc-plugins/gcc-common.h:9,
                    from scripts/gcc-plugins/latent_entropy_plugin.c:78:
>> /usr/lib/gcc/x86_64-linux-gnu/5/plugin/include/config/elfos.h:102:21: warning: invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]
       fprintf ((FILE), "%s"HOST_WIDE_INT_PRINT_UNSIGNED"\n",\

The problem isn't in a kernel source file...  To quote an earlier message of mine:

> It looks like it's not a kernel source tree issue, it's a g++ issue fixed in g++ 6 and later.


> And it looks like there was an intent to backport it to 4.9 and 5.4:

> The bugtracker doesn't show an equivalent for 69959 being closed against 4.9.x or 5.[56],

> has a patch for one of the
> gcc-supplied files that tosses the warning, but that way lies madness...

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