linux-kernel - Re: [PATCH] Support gcc 6 for building

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Message-ID: <20150416155626.GT2366@two.firstfloor.org>
Date:	Thu, 16 Apr 2015 17:56:26 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Michal Marek <mmarek@...e.cz>
Cc:	Andi Kleen <andi@...stfloor.org>, akpm@...ux-foundation.org,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>,
	Segher Boessenkool <segher@...nel.crashing.org>
Subject: Re: [PATCH] Support gcc 6 for building

On Thu, Apr 16, 2015 at 09:57:48AM +0200, Michal Marek wrote:
> On 2015-04-15 21:45, Andi Kleen wrote:
> > From: Andi Kleen <ak@...ux.intel.com>
> > 
> > gcc recently switched to a new version number scheme, where every version
> > gets a new major version number. The current version is 5.x, the next 6.x, etc.
> > 
> > The gcc git repository trunk branch just switched to report 6.x for the next
> > major release.
> > 
> > This breaks the way Linux selects compiler-gccX.h based on the major
> > version. Every new version would require adding a new compiler-gccX.h file,
> > which wouldn't really scale.
> > 
> > Let's assume that future gccs are fairly compatible (they are unlikely
> > to break anything Linux is relying on). So we can just keep using
> > compiler-gcc5.h, and select any specific differences with #if.
> 
> Good idea. With the new scheme, we could also merge back compiler-gcc5.h
> and compiler-gcc4.h. The only difference is the KASAN_ABI_VERSION define.

Would be fine too. Are you doing that, or should I send a patch?

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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