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

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Date:	Thu, 16 Apr 2015 09:57:48 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	Andi Kleen <andi@...stfloor.org>
CC:	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 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.

Michal
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