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From: Arnd Bergmann <arnd@arndb.de>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Ard Biesheuvel <ardb@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Borislav Petkov <bp@alien8.de>,
	linux-efi <linux-efi@vger.kernel.org>
Subject: Re: [GIT PULL] EFI fixes
Date: Fri, 10 Jul 2020 12:09:36 +0200
Message-ID: <CAK8P3a3Cd30gthLj-Kw8dsNa2Cse3YfUs9q8c=nc7fHtQ-QLSg@mail.gmail.com> (raw)
In-Reply-To: <20200709103459.wenqhbp52vesr7e5@box>

On Thu, Jul 9, 2020 at 12:35 PM Kirill A. Shutemov <kirill@shutemov.name> wrote:
>
> On Thu, Jul 09, 2020 at 11:30:27AM +0200, Arnd Bergmann wrote:
> > The most interesting version to require in the future would be
> > gcc-7, which IIRC is the point at which we can just use -std=gnu99
> > or -std=gnu11 instead of -std=gnu89 without running into the
> > problem with compound literals[1].
>
> It is gcc-5, not gcc-7. This commit:
>
> https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=d303aeafa9b4

Ok, glad I was wrong here. I confirmed that with gcc-5 or higher I
can build a kernel with -std=gnu11 or -std=gnu99 instead of
-std=gnu89, but gcc-4.9.4 fails with anything other than gnu89.

I forgot why we care though -- is there any behavior of gnu11
that we prefer over the gnu99 behavior, or is it just going with
the times because it's the right thing to do? All the interesting
features of c11 seem to also be available as extensions in
gcc-4.9's gnu89, though I could not find a definite list of the
differences.

      Arnd

  reply index

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-28 18:26 Ingo Molnar
2020-06-28 18:57 ` Linus Torvalds
2020-06-28 19:26   ` Ard Biesheuvel
2020-06-28 19:34     ` Borislav Petkov
2020-07-08 16:20   ` Peter Zijlstra
2020-07-08 18:00     ` Linus Torvalds
2020-07-09  8:28       ` Peter Zijlstra
2020-07-09  9:30       ` Arnd Bergmann
2020-07-09 10:34         ` Kirill A. Shutemov
2020-07-10 10:09           ` Arnd Bergmann [this message]
2020-07-10 11:00             ` Kirill A. Shutemov
2020-07-10 11:17               ` Lukas Wunner
2020-06-28 22:05 ` pr-tracker-bot
  -- strict thread matches above, loose matches on Subject: below --
2021-06-02 17:44 Ingo Molnar
2021-06-02 19:36 ` pr-tracker-bot
2021-03-21 10:47 Ingo Molnar
2021-03-21 18:45 ` pr-tracker-bot
2020-07-25 10:32 Ingo Molnar
2020-07-25 22:30 ` pr-tracker-bot
2020-04-15  9:03 Ingo Molnar
2020-04-16  0:45 ` pr-tracker-bot
2020-03-02  7:10 Ingo Molnar
2020-03-03 23:35 ` pr-tracker-bot
2020-01-18 17:16 Ingo Molnar
2020-01-18 21:05 ` pr-tracker-bot
2019-12-17 11:09 Ingo Molnar
2019-12-17 19:20 ` pr-tracker-bot
2019-11-01 17:43 Ingo Molnar
2019-11-01 19:10 ` pr-tracker-bot
2019-10-12 13:01 Ingo Molnar
2019-10-12 22:35 ` pr-tracker-bot
2019-06-29  8:23 Ingo Molnar
2019-06-29 11:45 ` pr-tracker-bot
2019-06-02 17:35 Ingo Molnar
2019-06-02 18:15 ` pr-tracker-bot
2018-12-09 21:59 Ingo Molnar
2018-12-09 23:45 ` pr-tracker-bot
2018-11-17 10:51 Ingo Molnar
2018-11-18 20:05 ` pr-tracker-bot
2017-12-06 22:05 Ingo Molnar
2017-10-27 19:10 Ingo Molnar
2017-06-02  6:46 Ingo Molnar
2017-03-07 20:21 Ingo Molnar
2017-02-02 20:54 Ingo Molnar
2017-01-15  9:53 Ingo Molnar
2016-11-14  7:50 Ingo Molnar
2016-10-22 10:36 Ingo Molnar
2016-09-13 18:08 Ingo Molnar
2016-08-12 19:17 Ingo Molnar
2016-06-10 12:36 Ingo Molnar
2016-05-06 11:07 Ingo Molnar
2015-10-03 10:11 Ingo Molnar

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