linux-kernel - Re: Cannot use CONFIG_GCC_PLUGINS: your gcc version does not support plugins, you should upgrade it to at least gcc 4.5

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Date:   Sat, 27 Aug 2016 21:31:59 +0800
From:   Fengguang Wu <fengguang.wu@...el.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     kbuild-all@...org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: Cannot use CONFIG_GCC_PLUGINS: your gcc version does not support
 plugins, you should upgrade it to at least gcc 4.5

Hi Kees,

On Sat, Aug 27, 2016 at 09:28:38AM -0400, Kees Cook wrote:
>Hi,
>
>This appears to be "as expected": 4.4 gcc doesn't have either of those
>features, so it correctly failed.

OK, I'll teach the robot to use newer compiler for CONFIG_GCC_PLUGINS.

Thanks,
Fengguang

>On Sat, Aug 27, 2016 at 1:52 AM, kbuild test robot
><fengguang.wu@...el.com> wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head:   28687b935e93a9041a485b9ecdcab0e335f8eda5
>> commit: ed58c0e9eefef517aa5a547b78658e2ab4422232 gcc-plugins: abort builds cleanly when not supported
>> date:   3 weeks ago
>> config: x86_64-randconfig-s1-08271305 (attached as .config)
>> compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
>> reproduce:
>>         git checkout ed58c0e9eefef517aa5a547b78658e2ab4422232
>>         # save the attached .config to linux build tree
>>         make ARCH=x86_64
>>
>> All errors (new ones prefixed by >>):
>>
>>    scripts/Makefile.gcc-plugins:17: warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler
>>>> Cannot use CONFIG_GCC_PLUGINS: your gcc version does not support plugins, you should upgrade it to at least gcc 4.5
>>    make[1]: *** [gcc-plugins-check] Error 1
>>    make[1]: Target 'prepare' not remade because of errors.
>>    make: *** [sub-make] Error 2
>>
>> ---
>> 0-DAY kernel test infrastructure                Open Source Technology Center
>> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
>
>
>
>-- 
>Kees Cook
>Nexus Security