linux-kernel - ARCv2 testing exposure (Re: arc build failures in -next due to ARCv2 patch)

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Message-ID: <C2D7FE5348E1B147BCA15975FBA23075CFB8734F@IN01WEMBXB.internal.synopsys.com>
Date:	Mon, 31 Aug 2015 10:35:40 +0000
From:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:	Guenter Roeck <private@...ck-us.net>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>
CC:	"arc-linux-dev@...opsys.com" <arc-linux-dev@...opsys.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
Subject: ARCv2 testing exposure (Re: arc build failures in -next due to
 ARCv2 patch)

Hi Guenter,

On Sunday 28 June 2015 08:46 PM, Vineet Gupta wrote:
> On Saturday 27 June 2015 07:46 PM, Guenter Roeck wrote:

>>> >> Thx for reporting the issue - I have pushed a fix (also attached) which shd cure
>>> >> it (don't have exactly similar oldish gcc at hand).
>> > 
>> > Not that old, really, it just isn't configured for ARCv2. Question is if I need two
>> > separate compilers or if I can configure it to support both v1 and v2.
>
> The compiler itself can support both - however issue is multilib'ing / libgcc. The
> elf32 compiler is multilib'ed - but we've been using the uclibc compiler (with
> just the right toggles) to build the kernel as well (to avoid having to use 2
> toolchains for kernel / user etc).
> 
> long story short - ATM, we need 2 different compilers to build legacy ARCompact,
> and newer ARCv2.

I was wondering about ARCv2 coverage in your build service. Do you have the needed
2nd toolchain for ARCv2 as well. If not can u add it please.

To build one, you could use upstream buildroot or the legacy scripts at

git@...hub.com:foss-for-synopsys-dwc-arc-processors/toolchain.git

Or if you so prefer, we also have prebuilt toolchains in github releases.

Thx,
-Vineet
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