linux-kernel - Re: [RFC] minimum gcc version for kernel: raise to gcc-4.3 or 4.6?

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Message-ID: <20161216170043.taaanbg5objnxjlh@breakpoint.cc>
Date:   Fri, 16 Dec 2016 18:00:43 +0100
From:   Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     linux-arch@...r.kernel.org, linux-kbuild@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...r.kernel.org,
        Russell King <rmk+kernel@...linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kernel-build-reports@...ts.linaro.org,
        kvmarm@...ts.cs.columbia.edu,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [RFC] minimum gcc version for kernel: raise to gcc-4.3 or 4.6?

On 2016-12-16 11:56:21 [+0100], Arnd Bergmann wrote:
> The original gcc-4.3 release was in early 2008. If we decide to still
> support that, we probably want the first 10 quirks in this series,
> while gcc-4.6 (released in 2011) requires none of them.

It this min gcc thingy ARM only?
The current minimium (documented) is gcc v3.2. With the -fno-PIE patches
I was going to raise the bar to at least v3.4 but did not get around to
it yet. hpa said that everything < 3.4 is broken on x86 [0].
Gert is getting code compiled on gcc v4.1 not sure if it is some kind of
gcc limitation or just for fun.
Unless people are stuck with some enterprise distro I don't see a reason
why one should not try a gcc-4.6 which is 5 years old. I had problems to
verify that the current kernel compiles with gcc v3.2 on x86 (it did
with a bunch of warnings with gcc 3.4 and booted).

[0] https://lkml.kernel.org/r/63c356a8-58a3-bc7e-88db-5c8071db15e1@zytor.com
> 	Arnd

Sebastian